linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
* [GIT PULL 00/22] perf/core improvements and fixes
@ 2016-12-13 15:09 Arnaldo Carvalho de Melo
  2016-12-13 15:09 ` [PATCH 01/22] perf tools: Move headers check into bash script Arnaldo Carvalho de Melo
                   ` (21 more replies)
  0 siblings, 22 replies; 23+ messages in thread
From: Arnaldo Carvalho de Melo @ 2016-12-13 15:09 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: linux-kernel, Arnaldo Carvalho de Melo, Adrian Hunter,
	Alexander Shishkin, Alexei Starovoitov, Alexis Berlemont,
	Andi Kleen, Daniel Borkmann, David Ahern, Hemant Kumar,
	Jiri Olsa, Joe Stringer, Masami Hiramatsu, Minchan Kim,
	Namhyung Kim, Peter Zijlstra, Wang Nan

From: Arnaldo Carvalho de Melo <acme@redhat.com>

Hi Ingo,

	Please consider pulling, I had most of this queued before your first
pull req to Linus for 4.10, most are fixes, with 'perf sched timehist --idle'
as a followup new feature to the 'perf sched timehist' command introduced in
this window.

Thanks,

- Arnaldo

Test results at the end of this message, as usual.

The following changes since commit b0c1ef52959582144bbea9a2b37db7f4c9e399f7:

  perf/x86: Fix exclusion of BTS and LBR for Goldmont (2016-12-11 13:06:09 +0100)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git tags/perf-core-for-mingo-20161213

for you to fetch changes up to a03f73547fb6e0f7f2942c46cce9b48df50238ba:

  samples/bpf: Drop unnecessary build targets. (2016-12-13 10:38:10 -0300)

----------------------------------------------------------------
perf/core improvements and fixes:

New features:

- Introduce 'perf sched timehist --idle', to analyse processes
  going to/from idle state (Namhyung Kim)

- Add scanning of SDT (Software Defined Tracing) probles arguments (Alexis Berlemont)

Fixes:

- Allow 'perf record -u user' to continue when facing races with threads
  going away after having scanned them via /proc (Jiri Olsa)

- Fix 'perf mem' --all-user/--all-kernel options (Jiri Olsa)

Infrastructure:

- Switch over samples/bpf/ to tools/lib/bpf, removing libbpf duplication (Joe Stringer)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

----------------------------------------------------------------
Alexis Berlemont (1):
      perf sdt: Add scanning of sdt probles arguments

Arnaldo Carvalho de Melo (1):
      perf tools: Remove some needless __maybe_unused

Jiri Olsa (6):
      perf tools: Move headers check into bash script
      perf mem: Fix --all-user/--all-kernel options
      perf evsel: Use variable instead of repeating lengthy FD macro
      perf thread_map: Add thread_map__remove function
      perf evsel: Allow to ignore missing pid
      perf record: Force ignore_missing_thread for uid option

Joe Stringer (8):
      tools lib bpf: Sync {tools,}/include/uapi/linux/bpf.h
      tools lib bpf: use __u32 from linux/types.h
      tools lib bpf: Add flags to bpf_create_map()
      samples/bpf: Make samples more libbpf-centric
      samples/bpf: Switch over to libbpf
      samples/bpf: Remove perf_event_open() declaration
      samples/bpf: Move open_raw_sock to separate header
      samples/bpf: Drop unnecessary build targets.

Namhyung Kim (6):
      perf sched timehist: Split is_idle_sample()
      perf sched timehist: Introduce struct idle_time_data
      perf sched timehist: Save callchain when entering idle
      perf sched timehist: Skip non-idle events when necessary
      perf sched timehist: Add -I/--idle-hist option
      perf sched timehist: Show callchains for idle stat

 samples/bpf/Makefile                              |  60 ++---
 samples/bpf/README.rst                            |   4 +-
 samples/bpf/bpf_load.c                            |  20 +-
 samples/bpf/fds_example.c                         |  10 +-
 samples/bpf/lathist_user.c                        |   3 +-
 samples/bpf/libbpf.c                              | 155 -------------
 samples/bpf/libbpf.h                              |  25 +--
 samples/bpf/map_perf_test_user.c                  |   1 +
 samples/bpf/offwaketime_user.c                    |  10 +-
 samples/bpf/sampleip_user.c                       |   8 +-
 samples/bpf/sock_example.c                        |  11 +-
 samples/bpf/sock_example.h                        |  35 +++
 samples/bpf/sockex1_user.c                        |   9 +-
 samples/bpf/sockex2_user.c                        |   7 +-
 samples/bpf/sockex3_user.c                        |   7 +-
 samples/bpf/spintest_user.c                       |  10 +-
 samples/bpf/tc_l2_redirect_user.c                 |   4 +-
 samples/bpf/test_cgrp2_array_pin.c                |   4 +-
 samples/bpf/test_current_task_under_cgroup_user.c |  10 +-
 samples/bpf/test_maps.c                           | 142 ++++++------
 samples/bpf/test_overhead_user.c                  |   2 +
 samples/bpf/test_probe_write_user_user.c          |   4 +-
 samples/bpf/test_verifier.c                       |   8 +-
 samples/bpf/trace_event_user.c                    |  24 +-
 samples/bpf/trace_output_user.c                   |   6 +-
 samples/bpf/tracex1_user.c                        |   2 +
 samples/bpf/tracex2_user.c                        |  12 +-
 samples/bpf/tracex3_user.c                        |   6 +-
 samples/bpf/tracex4_user.c                        |   6 +-
 samples/bpf/tracex5_user.c                        |   2 +
 samples/bpf/tracex6_user.c                        |   7 +-
 samples/bpf/xdp1_user.c                           |   4 +-
 tools/include/uapi/linux/bpf.h                    |  51 +++++
 tools/lib/bpf/bpf.c                               |   7 +-
 tools/lib/bpf/bpf.h                               |   6 +-
 tools/lib/bpf/libbpf.c                            |   3 +-
 tools/perf/Documentation/perf-sched.txt           |   4 +
 tools/perf/Makefile.perf                          |  94 +-------
 tools/perf/builtin-c2c.c                          |  13 +-
 tools/perf/builtin-mem.c                          |   4 +-
 tools/perf/builtin-record.c                       |   3 +
 tools/perf/builtin-report.c                       |   2 +-
 tools/perf/builtin-sched.c                        | 261 +++++++++++++++++++---
 tools/perf/builtin-stat.c                         |   6 +-
 tools/perf/check-headers.sh                       |  59 +++++
 tools/perf/perf.h                                 |   1 +
 tools/perf/tests/builtin-test.c                   |   4 +
 tools/perf/tests/tests.h                          |   1 +
 tools/perf/tests/thread-map.c                     |  44 ++++
 tools/perf/util/evsel.c                           |  61 ++++-
 tools/perf/util/evsel.h                           |   1 +
 tools/perf/util/symbol-elf.c                      |  25 ++-
 tools/perf/util/symbol.h                          |   1 +
 tools/perf/util/thread_map.c                      |  22 ++
 tools/perf/util/thread_map.h                      |   1 +
 55 files changed, 786 insertions(+), 506 deletions(-)
 delete mode 100644 samples/bpf/libbpf.c
 create mode 100644 samples/bpf/sock_example.h
 create mode 100755 tools/perf/check-headers.sh

  # uname -a
  Linux jouet 4.9.0-rc8+ #1 SMP Mon Dec 12 11:20:49 BRT 2016 x86_64 x86_64 x86_64 GNU/Linux
  # perf test
   1: vmlinux symtab matches kallsyms            : Ok
   2: Detect openat syscall event                : Ok
   3: Detect openat syscall event on all cpus    : Ok
   4: Read samples using the mmap interface      : Ok
   5: Parse event definition strings             : Ok
   6: PERF_RECORD_* events & perf_sample fields  : Ok
   7: Parse perf pmu format                      : Ok
   8: DSO data read                              : Ok
   9: DSO data cache                             : Ok
  10: DSO data reopen                            : Ok
  11: Roundtrip evsel->name                      : Ok
  12: Parse sched tracepoints fields             : Ok
  13: syscalls:sys_enter_openat event fields     : Ok
  14: Setup struct perf_event_attr               : Ok
  15: Match and link multiple hists              : Ok
  16: 'import perf' in python                    : Ok
  17: Breakpoint overflow signal handler         : Ok
  18: Breakpoint overflow sampling               : Ok
  19: Number of exit events of a simple workload : Ok
  20: Software clock events period values        : Ok
  21: Object code reading                        : Ok
  22: Sample parsing                             : Ok
  23: Use a dummy software event to keep tracking: Ok
  24: Parse with no sample_id_all bit set        : Ok
  25: Filter hist entries                        : Ok
  26: Lookup mmap thread                         : Ok
  27: Share thread mg                            : Ok
  28: Sort output of hist entries                : Ok
  29: Cumulate child hist entries                : Ok
  30: Track with sched_switch                    : Ok
  31: Filter fds with revents mask in a fdarray  : Ok
  32: Add fd to a fdarray, making it autogrow    : Ok
  33: kmod_path__parse                           : Ok
  34: Thread map                                 : Ok
  35: LLVM search and compile                    :
  35.1: Basic BPF llvm compile                    : Ok
  35.2: kbuild searching                          : Ok
  35.3: Compile source for BPF prologue generation: Ok
  35.4: Compile source for BPF relocation         : Ok
  36: Session topology                           : Ok
  37: BPF filter                                 :
  37.1: Basic BPF filtering                      : Ok
  37.2: BPF prologue generation                  : Ok
  37.3: BPF relocation checker                   : Ok
  38: Synthesize thread map                      : Ok
  39: Remove thread map                          : Ok
  40: Synthesize cpu map                         : Ok
  41: Synthesize stat config                     : Ok
  42: Synthesize stat                            : Ok
  43: Synthesize stat round                      : Ok
  44: Synthesize attr update                     : Ok
  45: Event times                                : Ok
  46: Read backward ring buffer                  : Ok
  47: Print cpu map                              : Ok
  48: Probe SDT events                           : Ok
  49: is_printable_array                         : Ok
  50: Print bitmap                               : Ok
  51: perf hooks                                 : Ok
  52: builtin clang support                      : Skip (not compiled in)
  53: x86 rdpmc                                  : Ok
  54: Convert perf time to TSC                   : Ok
  55: DWARF unwind                               : Ok
  56: x86 instruction decoder - new instructions : Ok
  57: Intel cqm nmi context read                 : Skip
  #
  # time dm
     1 alpine:3.4: Ok
     2 android-ndk:r12b-arm: Ok
     3 archlinux:latest: Ok
     4 centos:5: Ok
     5 centos:6: Ok
     6 centos:7: Ok
     7 debian:7: Ok
     8 debian:8: Ok
     9 debian:experimental: Ok
    10 debian:experimental-x-mips64: Ok
    11 fedora:20: Ok
    12 fedora:21: Ok
    13 fedora:22: Ok
    14 fedora:23: Ok
    15 fedora:24: Ok
    16 fedora:24-x-ARC-uClibc: Ok
    17 fedora:25: Ok
    18 fedora:rawhide: Ok
    19 mageia:5: Ok
    20 opensuse:13.2: Ok
    21 opensuse:42.1: Ok
    22 opensuse:tumbleweed: Ok
    23 ubuntu:12.04.5: Ok
    24 ubuntu:14.04.4-x-linaro-arm64: Ok
    25 ubuntu:16.04: Ok
    26 ubuntu:16.04-x-arm: Ok
    27 ubuntu:16.04-x-arm64: Ok
    28 ubuntu:16.04-x-powerpc: Ok
    29 ubuntu:16.04-x-powerpc64: Ok
    30 ubuntu:16.04-x-powerpc64el: Ok
    31 ubuntu:16.04-x-s390: Ok
    32 ubuntu:16.10: Ok
  #
  [acme@felicio linux]$ make -C tools/perf build-test
  make: Entering directory `/home/acme/git/linux/tools/perf'
  - tarpkg: ./tests/perf-targz-src-pkg .
        make_with_babeltrace_O: make LIBBABELTRACE=1
         make_with_clangllvm_O: make LIBCLANGLLVM=1
                    make_doc_O: make doc
                 make_cscope_O: make cscope
                  make_debug_O: make DEBUG=1
             make_no_scripts_O: make NO_LIBPYTHON=1 NO_LIBPERL=1
                 make_perf_o_O: make perf.o
            make_install_bin_O: make install-bin
                make_no_newt_O: make NO_NEWT=1
               make_no_slang_O: make NO_SLANG=1
              make_clean_all_O: make clean all
                   make_help_O: make help
           make_no_libbionic_O: make NO_LIBBIONIC=1
  make_no_libdw_dwarf_unwind_O: make NO_LIBDW_DWARF_UNWIND=1
            make_no_demangle_O: make NO_DEMANGLE=1
              make_no_libelf_O: make NO_LIBELF=1
                   make_pure_O: make
             make_no_libnuma_O: make NO_LIBNUMA=1
              make_no_libbpf_O: make NO_LIBBPF=1
                make_no_gtk2_O: make NO_GTK2=1
           make_no_libpython_O: make NO_LIBPYTHON=1
             make_no_libperl_O: make NO_LIBPERL=1
            make_no_libaudit_O: make NO_LIBAUDIT=1
                 make_static_O: make LDFLAGS=-static
             make_util_map_o_O: make util/map.o
   make_install_prefix_slash_O: make install prefix=/tmp/krava/
         make_install_prefix_O: make install prefix=/tmp/krava
       make_util_pmu_bison_o_O: make util/pmu-bison.o
                   make_tags_O: make tags
                  make_no_ui_O: make NO_NEWT=1 NO_SLANG=1 NO_GTK2=1
                make_install_O: make install
            make_no_auxtrace_O: make NO_AUXTRACE=1
           make_no_backtrace_O: make NO_BACKTRACE=1
                make_minimal_O: make NO_LIBPERL=1 NO_LIBPYTHON=1 NO_NEWT=1 NO_GTK2=1 NO_DEMANGLE=1 NO_LIBELF=1 NO_LIBUNWIND=1 NO_BACKTRACE=1 NO_LIBNUMA=1 NO_LIBAUDIT=1 NO_LIBBIONIC=1 NO_LIBDW_DWARF_UNWIND=1 NO_AUXTRACE=1 NO_LIBBPF=1 NO_LIBCRYPTO=1 NO_SDT=1 NO_JVMTI=1
           make_no_libunwind_O: make NO_LIBUNWIND=1
  OK
  make: Leaving directory `/home/acme/git/linux/tools/perf'
  [acme@felicio linux]$

^ permalink raw reply	[flat|nested] 23+ messages in thread

* [PATCH 01/22] perf tools: Move headers check into bash script
  2016-12-13 15:09 [GIT PULL 00/22] perf/core improvements and fixes Arnaldo Carvalho de Melo
@ 2016-12-13 15:09 ` Arnaldo Carvalho de Melo
  2016-12-13 15:09 ` [PATCH 02/22] perf sched timehist: Split is_idle_sample() Arnaldo Carvalho de Melo
                   ` (20 subsequent siblings)
  21 siblings, 0 replies; 23+ messages in thread
From: Arnaldo Carvalho de Melo @ 2016-12-13 15:09 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: linux-kernel, Jiri Olsa, David Ahern, Namhyung Kim,
	Peter Zijlstra, Arnaldo Carvalho de Melo

From: Jiri Olsa <jolsa@kernel.org>

To make it nicer and easily maintainable.

Also moving the check into fixdep sub make, so its output is not
scattered around the build output.

Removing extra $$ from mman*.h checks.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1481030331-31944-5-git-send-email-jolsa@kernel.org
[ Use /bin/sh, and 'function check() {' -> 'check () {' to make it work with busybox, in Alpine Linux, for instance ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/Makefile.perf    | 94 +--------------------------------------------
 tools/perf/check-headers.sh | 59 ++++++++++++++++++++++++++++
 2 files changed, 60 insertions(+), 93 deletions(-)
 create mode 100755 tools/perf/check-headers.sh

diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 8f1c258b151a..e9ec531131ca 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -201,6 +201,7 @@ goals := $(filter-out all sub-make, $(MAKECMDGOALS))
 $(goals) all: sub-make
 
 sub-make: fixdep
+	@./check-headers.sh
 	$(Q)$(MAKE) FIXDEP=1 -f Makefile.perf $(goals)
 
 else # force_fixdep
@@ -404,99 +405,6 @@ export JEVENTS
 build := -f $(srctree)/tools/build/Makefile.build dir=. obj
 
 $(PERF_IN): prepare FORCE
-	@(test -f ../../include/uapi/linux/perf_event.h && ( \
-        (diff -B ../include/uapi/linux/perf_event.h ../../include/uapi/linux/perf_event.h >/dev/null) \
-        || echo "Warning: tools/include/uapi/linux/perf_event.h differs from kernel" >&2 )) || true
-	@(test -f ../../include/linux/hash.h && ( \
-        (diff -B ../include/linux/hash.h ../../include/linux/hash.h >/dev/null) \
-        || echo "Warning: tools/include/linux/hash.h differs from kernel" >&2 )) || true
-	@(test -f ../../include/uapi/linux/hw_breakpoint.h && ( \
-        (diff -B ../include/uapi/linux/hw_breakpoint.h ../../include/uapi/linux/hw_breakpoint.h >/dev/null) \
-        || echo "Warning: tools/include/uapi/linux/hw_breakpoint.h differs from kernel" >&2 )) || true
-	@(test -f ../../arch/x86/include/asm/disabled-features.h && ( \
-        (diff -B ../arch/x86/include/asm/disabled-features.h ../../arch/x86/include/asm/disabled-features.h >/dev/null) \
-        || echo "Warning: tools/arch/x86/include/asm/disabled-features.h differs from kernel" >&2 )) || true
-	@(test -f ../../arch/x86/include/asm/required-features.h && ( \
-        (diff -B ../arch/x86/include/asm/required-features.h ../../arch/x86/include/asm/required-features.h >/dev/null) \
-        || echo "Warning: tools/arch/x86/include/asm/required-features.h differs from kernel" >&2 )) || true
-	@(test -f ../../arch/x86/include/asm/cpufeatures.h && ( \
-        (diff -B ../arch/x86/include/asm/cpufeatures.h ../../arch/x86/include/asm/cpufeatures.h >/dev/null) \
-        || echo "Warning: tools/arch/x86/include/asm/cpufeatures.h differs from kernel" >&2 )) || true
-	@(test -f ../../arch/x86/lib/memcpy_64.S && ( \
-        (diff -B -I "^EXPORT_SYMBOL" -I "^#include <asm/export.h>" ../arch/x86/lib/memcpy_64.S ../../arch/x86/lib/memcpy_64.S >/dev/null) \
-        || echo "Warning: tools/arch/x86/lib/memcpy_64.S differs from kernel" >&2 )) || true
-	@(test -f ../../arch/x86/lib/memset_64.S && ( \
-        (diff -B -I "^EXPORT_SYMBOL" -I "^#include <asm/export.h>" ../arch/x86/lib/memset_64.S ../../arch/x86/lib/memset_64.S >/dev/null) \
-        || echo "Warning: tools/arch/x86/lib/memset_64.S differs from kernel" >&2 )) || true
-	@(test -f ../../arch/arm/include/uapi/asm/perf_regs.h && ( \
-        (diff -B ../arch/arm/include/uapi/asm/perf_regs.h ../../arch/arm/include/uapi/asm/perf_regs.h >/dev/null) \
-        || echo "Warning: tools/arch/arm/include/uapi/asm/perf_regs.h differs from kernel" >&2 )) || true
-	@(test -f ../../arch/arm64/include/uapi/asm/perf_regs.h && ( \
-        (diff -B ../arch/arm64/include/uapi/asm/perf_regs.h ../../arch/arm64/include/uapi/asm/perf_regs.h >/dev/null) \
-        || echo "Warning: tools/arch/arm64/include/uapi/asm/perf_regs.h differs from kernel" >&2 )) || true
-	@(test -f ../../arch/powerpc/include/uapi/asm/perf_regs.h && ( \
-        (diff -B ../arch/powerpc/include/uapi/asm/perf_regs.h ../../arch/powerpc/include/uapi/asm/perf_regs.h >/dev/null) \
-        || echo "Warning: tools/arch/powerpc/include/uapi/asm/perf_regs.h differs from kernel" >&2 )) || true
-	@(test -f ../../arch/x86/include/uapi/asm/perf_regs.h && ( \
-        (diff -B ../arch/x86/include/uapi/asm/perf_regs.h ../../arch/x86/include/uapi/asm/perf_regs.h >/dev/null) \
-        || echo "Warning: tools/arch/x86/include/uapi/asm/perf_regs.h differs from kernel" >&2 )) || true
-	@(test -f ../../arch/x86/include/uapi/asm/kvm.h && ( \
-        (diff -B ../arch/x86/include/uapi/asm/kvm.h ../../arch/x86/include/uapi/asm/kvm.h >/dev/null) \
-        || echo "Warning: tools/arch/x86/include/uapi/asm/kvm.h differs from kernel" >&2 )) || true
-	@(test -f ../../arch/x86/include/uapi/asm/kvm_perf.h && ( \
-        (diff -B ../arch/x86/include/uapi/asm/kvm_perf.h ../../arch/x86/include/uapi/asm/kvm_perf.h >/dev/null) \
-        || echo "Warning: tools/arch/x86/include/uapi/asm/kvm_perf.h differs from kernel" >&2 )) || true
-	@(test -f ../../arch/x86/include/uapi/asm/svm.h && ( \
-        (diff -B ../arch/x86/include/uapi/asm/svm.h ../../arch/x86/include/uapi/asm/svm.h >/dev/null) \
-        || echo "Warning: tools/arch/x86/include/uapi/asm/svm.h differs from kernel" >&2 )) || true
-	@(test -f ../../arch/x86/include/uapi/asm/vmx.h && ( \
-        (diff -B ../arch/x86/include/uapi/asm/vmx.h ../../arch/x86/include/uapi/asm/vmx.h >/dev/null) \
-        || echo "Warning: tools/arch/x86/include/uapi/asm/vmx.h differs from kernel" >&2 )) || true
-	@(test -f ../../arch/powerpc/include/uapi/asm/kvm.h && ( \
-        (diff -B ../arch/powerpc/include/uapi/asm/kvm.h ../../arch/powerpc/include/uapi/asm/kvm.h >/dev/null) \
-        || echo "Warning: tools/arch/powerpc/include/uapi/asm/kvm.h differs from kernel" >&2 )) || true
-	@(test -f ../../arch/s390/include/uapi/asm/kvm.h && ( \
-        (diff -B ../arch/s390/include/uapi/asm/kvm.h ../../arch/s390/include/uapi/asm/kvm.h >/dev/null) \
-        || echo "Warning: tools/arch/s390/include/uapi/asm/kvm.h differs from kernel" >&2 )) || true
-	@(test -f ../../arch/s390/include/uapi/asm/kvm_perf.h && ( \
-        (diff -B ../arch/s390/include/uapi/asm/kvm_perf.h ../../arch/s390/include/uapi/asm/kvm_perf.h >/dev/null) \
-        || echo "Warning: tools/arch/s390/include/uapi/asm/kvm_perf.h differs from kernel" >&2 )) || true
-	@(test -f ../../arch/s390/include/uapi/asm/sie.h && ( \
-        (diff -B ../arch/s390/include/uapi/asm/sie.h ../../arch/s390/include/uapi/asm/sie.h >/dev/null) \
-        || echo "Warning: tools/arch/s390/include/uapi/asm/sie.h differs from kernel" >&2 )) || true
-	@(test -f ../../arch/arm/include/uapi/asm/kvm.h && ( \
-        (diff -B ../arch/arm/include/uapi/asm/kvm.h ../../arch/arm/include/uapi/asm/kvm.h >/dev/null) \
-        || echo "Warning: tools/arch/arm/include/uapi/asm/kvm.h differs from kernel" >&2 )) || true
-	@(test -f ../../arch/arm64/include/uapi/asm/kvm.h && ( \
-        (diff -B ../arch/arm64/include/uapi/asm/kvm.h ../../arch/arm64/include/uapi/asm/kvm.h >/dev/null) \
-        || echo "Warning: tools/arch/arm64/include/uapi/asm/kvm.h differs from kernel" >&2 )) || true
-	@(test -f ../../include/asm-generic/bitops/arch_hweight.h && ( \
-        (diff -B ../include/asm-generic/bitops/arch_hweight.h ../../include/asm-generic/bitops/arch_hweight.h >/dev/null) \
-        || echo "Warning: tools/include/asm-generic/bitops/arch_hweight.h differs from kernel" >&2 )) || true
-	@(test -f ../../include/asm-generic/bitops/const_hweight.h && ( \
-        (diff -B ../include/asm-generic/bitops/const_hweight.h ../../include/asm-generic/bitops/const_hweight.h >/dev/null) \
-        || echo "Warning: tools/include/asm-generic/bitops/const_hweight.h differs from kernel" >&2 )) || true
-	@(test -f ../../include/asm-generic/bitops/__fls.h && ( \
-        (diff -B ../include/asm-generic/bitops/__fls.h ../../include/asm-generic/bitops/__fls.h >/dev/null) \
-        || echo "Warning: tools/include/asm-generic/bitops/__fls.h differs from kernel" >&2 )) || true
-	@(test -f ../../include/asm-generic/bitops/fls.h && ( \
-        (diff -B ../include/asm-generic/bitops/fls.h ../../include/asm-generic/bitops/fls.h >/dev/null) \
-        || echo "Warning: tools/include/asm-generic/bitops/fls.h differs from kernel" >&2 )) || true
-	@(test -f ../../include/asm-generic/bitops/fls64.h && ( \
-        (diff -B ../include/asm-generic/bitops/fls64.h ../../include/asm-generic/bitops/fls64.h >/dev/null) \
-        || echo "Warning: tools/include/asm-generic/bitops/fls64.h differs from kernel" >&2 )) || true
-	@(test -f ../../include/linux/coresight-pmu.h && ( \
-	(diff -B ../include/linux/coresight-pmu.h ../../include/linux/coresight-pmu.h >/dev/null) \
-	|| echo "Warning: tools/include/linux/coresight-pmu.h differs from kernel" >&2 )) || true
-	@(test -f ../../include/uapi/asm-generic/mman-common.h && ( \
-	(diff -B ../include/uapi/asm-generic/mman-common.h ../../include/uapi/asm-generic/mman-common.h >/dev/null) \
-	|| echo "Warning: tools/include/uapi/asm-generic/mman-common.h differs from kernel" >&2 )) || true
-	@(test -f ../../include/uapi/asm-generic/mman.h && ( \
-	(diff -B -I "^#include <\(uapi/\)*asm-generic/mman-common.h>$$" ../include/uapi/asm-generic/mman.h ../../include/uapi/asm-generic/mman.h >/dev/null) \
-	|| echo "Warning: tools/include/uapi/asm-generic/mman.h differs from kernel" >&2 )) || true
-	@(test -f ../../include/uapi/linux/mman.h && ( \
-	(diff -B -I "^#include <\(uapi/\)*asm/mman.h>$$" ../include/uapi/linux/mman.h ../../include/uapi/linux/mman.h >/dev/null) \
-	|| echo "Warning: tools/include/uapi/linux/mman.h differs from kernel" >&2 )) || true
 	$(Q)$(MAKE) $(build)=perf
 
 $(JEVENTS_IN): FORCE
diff --git a/tools/perf/check-headers.sh b/tools/perf/check-headers.sh
new file mode 100755
index 000000000000..c747bfd7f14d
--- /dev/null
+++ b/tools/perf/check-headers.sh
@@ -0,0 +1,59 @@
+#!/bin/sh
+
+HEADERS='
+include/uapi/linux/perf_event.h
+include/linux/hash.h
+include/uapi/linux/hw_breakpoint.h
+arch/x86/include/asm/disabled-features.h
+arch/x86/include/asm/required-features.h
+arch/x86/include/asm/cpufeatures.h
+arch/arm/include/uapi/asm/perf_regs.h
+arch/arm64/include/uapi/asm/perf_regs.h
+arch/powerpc/include/uapi/asm/perf_regs.h
+arch/x86/include/uapi/asm/perf_regs.h
+arch/x86/include/uapi/asm/kvm.h
+arch/x86/include/uapi/asm/kvm_perf.h
+arch/x86/include/uapi/asm/svm.h
+arch/x86/include/uapi/asm/vmx.h
+arch/powerpc/include/uapi/asm/kvm.h
+arch/s390/include/uapi/asm/kvm.h
+arch/s390/include/uapi/asm/kvm_perf.h
+arch/s390/include/uapi/asm/sie.h
+arch/arm/include/uapi/asm/kvm.h
+arch/arm64/include/uapi/asm/kvm.h
+include/asm-generic/bitops/arch_hweight.h
+include/asm-generic/bitops/const_hweight.h
+include/asm-generic/bitops/__fls.h
+include/asm-generic/bitops/fls.h
+include/asm-generic/bitops/fls64.h
+include/linux/coresight-pmu.h
+include/uapi/asm-generic/mman-common.h
+'
+
+check () {
+  file=$1
+  opts=
+
+  shift
+  while [ -n "$*" ]; do
+    opts="$opts \"$1\""
+    shift
+  done
+
+  cmd="diff $opts ../$file ../../$file > /dev/null"
+
+  test -f ../../$file &&
+  eval $cmd || echo "Warning: $file differs from kernel" >&2
+}
+
+
+# simple diff check
+for i in $HEADERS; do
+  check $i -B
+done
+
+# diff with extra ignore lines
+check arch/x86/lib/memcpy_64.S        -B -I "^EXPORT_SYMBOL" -I "^#include <asm/export.h>"
+check arch/x86/lib/memset_64.S        -B -I "^EXPORT_SYMBOL" -I "^#include <asm/export.h>"
+check include/uapi/asm-generic/mman.h -B -I "^#include <\(uapi/\)*asm-generic/mman-common.h>"
+check include/uapi/linux/mman.h       -B -I "^#include <\(uapi/\)*asm/mman.h>"
-- 
2.9.3

^ permalink raw reply related	[flat|nested] 23+ messages in thread

* [PATCH 02/22] perf sched timehist: Split is_idle_sample()
  2016-12-13 15:09 [GIT PULL 00/22] perf/core improvements and fixes Arnaldo Carvalho de Melo
  2016-12-13 15:09 ` [PATCH 01/22] perf tools: Move headers check into bash script Arnaldo Carvalho de Melo
@ 2016-12-13 15:09 ` Arnaldo Carvalho de Melo
  2016-12-13 15:09 ` [PATCH 03/22] perf sched timehist: Introduce struct idle_time_data Arnaldo Carvalho de Melo
                   ` (19 subsequent siblings)
  21 siblings, 0 replies; 23+ messages in thread
From: Arnaldo Carvalho de Melo @ 2016-12-13 15:09 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: linux-kernel, Namhyung Kim, Andi Kleen, Jiri Olsa, Minchan Kim,
	Peter Zijlstra, Arnaldo Carvalho de Melo

From: Namhyung Kim <namhyung@kernel.org>

The is_idle_sample() function actually does more than determining
whether sample come from idle task.  Split the callchain part into
save_task_callchain() to make it clearer.

Also checking prev_pid from trace data looks preferred than just
checking sample->pid since it's possible, although rare, to have invalid
0 pid/tid on scheduling an exiting task.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: David Ahern <dsahern@gmail.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20161208144755.16673-2-namhyung@kernel.org
[ Remove some needless () in some return statements ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/builtin-sched.c | 39 ++++++++++++++++++++-------------------
 1 file changed, 20 insertions(+), 19 deletions(-)

diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index 1a3f1be93372..966eddce1609 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -1939,39 +1939,40 @@ static void timehist_update_runtime_stats(struct thread_runtime *r,
 	r->total_run_time += r->dt_run;
 }
 
-static bool is_idle_sample(struct perf_sched *sched,
-			   struct perf_sample *sample,
-			   struct perf_evsel *evsel,
-			   struct machine *machine)
+static bool is_idle_sample(struct perf_sample *sample,
+			   struct perf_evsel *evsel)
 {
-	struct thread *thread;
-	struct callchain_cursor *cursor = &callchain_cursor;
-
 	/* pid 0 == swapper == idle task */
-	if (sample->pid == 0)
-		return true;
+	if (strcmp(perf_evsel__name(evsel), "sched:sched_switch") == 0)
+		return perf_evsel__intval(evsel, sample, "prev_pid") == 0;
 
-	if (strcmp(perf_evsel__name(evsel), "sched:sched_switch") == 0) {
-		if (perf_evsel__intval(evsel, sample, "prev_pid") == 0)
-			return true;
-	}
+	return sample->pid == 0;
+}
+
+static void save_task_callchain(struct perf_sched *sched,
+				struct perf_sample *sample,
+				struct perf_evsel *evsel,
+				struct machine *machine)
+{
+	struct callchain_cursor *cursor = &callchain_cursor;
+	struct thread *thread;
 
 	/* want main thread for process - has maps */
 	thread = machine__findnew_thread(machine, sample->pid, sample->pid);
 	if (thread == NULL) {
 		pr_debug("Failed to get thread for pid %d.\n", sample->pid);
-		return false;
+		return;
 	}
 
 	if (!symbol_conf.use_callchain || sample->callchain == NULL)
-		return false;
+		return;
 
 	if (thread__resolve_callchain(thread, cursor, evsel, sample,
 				      NULL, NULL, sched->max_stack + 2) != 0) {
 		if (verbose)
 			error("Failed to resolve callchain. Skipping\n");
 
-		return false;
+		return;
 	}
 
 	callchain_cursor_commit(cursor);
@@ -1994,8 +1995,6 @@ static bool is_idle_sample(struct perf_sched *sched,
 
 		callchain_cursor_advance(cursor);
 	}
-
-	return false;
 }
 
 /*
@@ -2111,7 +2110,7 @@ static struct thread *timehist_get_thread(struct perf_sched *sched,
 {
 	struct thread *thread;
 
-	if (is_idle_sample(sched, sample, evsel, machine)) {
+	if (is_idle_sample(sample, evsel)) {
 		thread = get_idle_thread(sample->cpu);
 		if (thread == NULL)
 			pr_err("Failed to get idle thread for cpu %d.\n", sample->cpu);
@@ -2124,6 +2123,8 @@ static struct thread *timehist_get_thread(struct perf_sched *sched,
 			pr_debug("Failed to get thread for tid %d. skipping sample.\n",
 				 sample->tid);
 		}
+
+		save_task_callchain(sched, sample, evsel, machine);
 	}
 
 	return thread;
-- 
2.9.3

^ permalink raw reply related	[flat|nested] 23+ messages in thread

* [PATCH 03/22] perf sched timehist: Introduce struct idle_time_data
  2016-12-13 15:09 [GIT PULL 00/22] perf/core improvements and fixes Arnaldo Carvalho de Melo
  2016-12-13 15:09 ` [PATCH 01/22] perf tools: Move headers check into bash script Arnaldo Carvalho de Melo
  2016-12-13 15:09 ` [PATCH 02/22] perf sched timehist: Split is_idle_sample() Arnaldo Carvalho de Melo
@ 2016-12-13 15:09 ` Arnaldo Carvalho de Melo
  2016-12-13 15:09 ` [PATCH 04/22] perf sched timehist: Save callchain when entering idle Arnaldo Carvalho de Melo
                   ` (18 subsequent siblings)
  21 siblings, 0 replies; 23+ messages in thread
From: Arnaldo Carvalho de Melo @ 2016-12-13 15:09 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: linux-kernel, Namhyung Kim, Andi Kleen, Jiri Olsa, Minchan Kim,
	Peter Zijlstra, Arnaldo Carvalho de Melo

From: Namhyung Kim <namhyung@kernel.org>

The struct idle_time_data is to keep idle stats with callchains entering
to the idle task.  The normal thread_runtime calculation is done
transparently since it extends the struct thread_runtime.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: David Ahern <dsahern@gmail.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20161208144755.16673-3-namhyung@kernel.org
[ Align struct field names ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/builtin-sched.c | 37 +++++++++++++++++++++++++++++++++----
 1 file changed, 33 insertions(+), 4 deletions(-)

diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index 966eddce1609..e108b0f6a246 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -230,6 +230,15 @@ struct evsel_runtime {
 	u32 ncpu;       /* highest cpu slot allocated */
 };
 
+/* per cpu idle time data */
+struct idle_thread_runtime {
+	struct thread_runtime	tr;
+	struct thread		*last_thread;
+	struct rb_root		sorted_root;
+	struct callchain_root	callchain;
+	struct callchain_cursor	cursor;
+};
+
 /* track idle times per cpu */
 static struct thread **idle_threads;
 static int idle_max_cpu;
@@ -1997,13 +2006,31 @@ static void save_task_callchain(struct perf_sched *sched,
 	}
 }
 
+static int init_idle_thread(struct thread *thread)
+{
+	struct idle_thread_runtime *itr;
+
+	thread__set_comm(thread, idle_comm, 0);
+
+	itr = zalloc(sizeof(*itr));
+	if (itr == NULL)
+		return -ENOMEM;
+
+	init_stats(&itr->tr.run_stats);
+	callchain_init(&itr->callchain);
+	callchain_cursor_reset(&itr->cursor);
+	thread__set_priv(thread, itr);
+
+	return 0;
+}
+
 /*
  * Track idle stats per cpu by maintaining a local thread
  * struct for the idle task on each cpu.
  */
 static int init_idle_threads(int ncpu)
 {
-	int i;
+	int i, ret;
 
 	idle_threads = zalloc(ncpu * sizeof(struct thread *));
 	if (!idle_threads)
@@ -2017,7 +2044,9 @@ static int init_idle_threads(int ncpu)
 		if (idle_threads[i] == NULL)
 			return -ENOMEM;
 
-		thread__set_comm(idle_threads[i], idle_comm, 0);
+		ret = init_idle_thread(idle_threads[i]);
+		if (ret < 0)
+			return ret;
 	}
 
 	return 0;
@@ -2064,8 +2093,8 @@ static struct thread *get_idle_thread(int cpu)
 		idle_threads[cpu] = thread__new(0, 0);
 
 		if (idle_threads[cpu]) {
-			idle_threads[cpu]->tid = 0;
-			thread__set_comm(idle_threads[cpu], idle_comm, 0);
+			if (init_idle_thread(idle_threads[cpu]) < 0)
+				return NULL;
 		}
 	}
 
-- 
2.9.3

^ permalink raw reply related	[flat|nested] 23+ messages in thread

* [PATCH 04/22] perf sched timehist: Save callchain when entering idle
  2016-12-13 15:09 [GIT PULL 00/22] perf/core improvements and fixes Arnaldo Carvalho de Melo
                   ` (2 preceding siblings ...)
  2016-12-13 15:09 ` [PATCH 03/22] perf sched timehist: Introduce struct idle_time_data Arnaldo Carvalho de Melo
@ 2016-12-13 15:09 ` Arnaldo Carvalho de Melo
  2016-12-13 15:09 ` [PATCH 05/22] perf sched timehist: Skip non-idle events when necessary Arnaldo Carvalho de Melo
                   ` (17 subsequent siblings)
  21 siblings, 0 replies; 23+ messages in thread
From: Arnaldo Carvalho de Melo @ 2016-12-13 15:09 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: linux-kernel, Namhyung Kim, Andi Kleen, Jiri Olsa, Minchan Kim,
	Peter Zijlstra, Arnaldo Carvalho de Melo

From: Namhyung Kim <namhyung@kernel.org>

In order to investigate the idleness reason, it is necessary to keep the
callchains when entering idle.  This can be identified by the
sched:sched_switch event having the next_pid field as 0.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: David Ahern <dsahern@gmail.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20161208144755.16673-4-namhyung@kernel.org
Link: http://lkml.kernel.org/r/20161213080632.19099-1-namhyung@kernel.org
[ Merged fix from Namhyung, see second Link: tag ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/builtin-sched.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index e108b0f6a246..dc83b803ca54 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -200,6 +200,7 @@ struct perf_sched {
 	/* options for timehist command */
 	bool		summary;
 	bool		summary_only;
+	bool		idle_hist;
 	bool		show_callchain;
 	unsigned int	max_stack;
 	bool		show_cpu_visual;
@@ -2101,6 +2102,15 @@ static struct thread *get_idle_thread(int cpu)
 	return idle_threads[cpu];
 }
 
+static void save_idle_callchain(struct idle_thread_runtime *itr,
+				struct perf_sample *sample)
+{
+	if (!symbol_conf.use_callchain || sample->callchain == NULL)
+		return;
+
+	callchain_cursor__copy(&itr->cursor, &callchain_cursor);
+}
+
 /*
  * handle runtime stats saved per thread
  */
@@ -2154,6 +2164,26 @@ static struct thread *timehist_get_thread(struct perf_sched *sched,
 		}
 
 		save_task_callchain(sched, sample, evsel, machine);
+		if (sched->idle_hist) {
+			struct thread *idle;
+			struct idle_thread_runtime *itr;
+
+			idle = get_idle_thread(sample->cpu);
+			if (idle == NULL) {
+				pr_err("Failed to get idle thread for cpu %d.\n", sample->cpu);
+				return NULL;
+			}
+
+			itr = thread__priv(idle);
+			if (itr == NULL)
+				return NULL;
+
+			itr->last_thread = thread;
+
+			/* copy task callchain when entering to idle */
+			if (perf_evsel__intval(evsel, sample, "next_pid") == 0)
+				save_idle_callchain(itr, sample);
+		}
 	}
 
 	return thread;
-- 
2.9.3

^ permalink raw reply related	[flat|nested] 23+ messages in thread

* [PATCH 05/22] perf sched timehist: Skip non-idle events when necessary
  2016-12-13 15:09 [GIT PULL 00/22] perf/core improvements and fixes Arnaldo Carvalho de Melo
                   ` (3 preceding siblings ...)
  2016-12-13 15:09 ` [PATCH 04/22] perf sched timehist: Save callchain when entering idle Arnaldo Carvalho de Melo
@ 2016-12-13 15:09 ` Arnaldo Carvalho de Melo
  2016-12-13 15:09 ` [PATCH 06/22] perf sched timehist: Add -I/--idle-hist option Arnaldo Carvalho de Melo
                   ` (16 subsequent siblings)
  21 siblings, 0 replies; 23+ messages in thread
From: Arnaldo Carvalho de Melo @ 2016-12-13 15:09 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: linux-kernel, Namhyung Kim, Andi Kleen, Jiri Olsa, Minchan Kim,
	Peter Zijlstra, Arnaldo Carvalho de Melo

From: Namhyung Kim <namhyung@kernel.org>

Sometimes it only focuses on idle-related events like upcoming idle-hist
feature.  In this case we don't want to see other event to reduce noise.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: David Ahern <dsahern@gmail.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20161208144755.16673-5-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/builtin-sched.c | 25 ++++++++++++++++++-------
 1 file changed, 18 insertions(+), 7 deletions(-)

diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index dc83b803ca54..c8e7848e71a7 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -2190,7 +2190,9 @@ static struct thread *timehist_get_thread(struct perf_sched *sched,
 }
 
 static bool timehist_skip_sample(struct perf_sched *sched,
-				 struct thread *thread)
+				 struct thread *thread,
+				 struct perf_evsel *evsel,
+				 struct perf_sample *sample)
 {
 	bool rc = false;
 
@@ -2199,10 +2201,19 @@ static bool timehist_skip_sample(struct perf_sched *sched,
 		sched->skipped_samples++;
 	}
 
+	if (sched->idle_hist) {
+		if (strcmp(perf_evsel__name(evsel), "sched:sched_switch"))
+			rc = true;
+		else if (perf_evsel__intval(evsel, sample, "prev_pid") != 0 &&
+			 perf_evsel__intval(evsel, sample, "next_pid") != 0)
+			rc = true;
+	}
+
 	return rc;
 }
 
 static void timehist_print_wakeup_event(struct perf_sched *sched,
+					struct perf_evsel *evsel,
 					struct perf_sample *sample,
 					struct machine *machine,
 					struct thread *awakened)
@@ -2215,8 +2226,8 @@ static void timehist_print_wakeup_event(struct perf_sched *sched,
 		return;
 
 	/* show wakeup unless both awakee and awaker are filtered */
-	if (timehist_skip_sample(sched, thread) &&
-	    timehist_skip_sample(sched, awakened)) {
+	if (timehist_skip_sample(sched, thread, evsel, sample) &&
+	    timehist_skip_sample(sched, awakened, evsel, sample)) {
 		return;
 	}
 
@@ -2261,7 +2272,7 @@ static int timehist_sched_wakeup_event(struct perf_tool *tool,
 	/* show wakeups if requested */
 	if (sched->show_wakeups &&
 	    !perf_time__skip_sample(&sched->ptime, sample->time))
-		timehist_print_wakeup_event(sched, sample, machine, thread);
+		timehist_print_wakeup_event(sched, evsel, sample, machine, thread);
 
 	return 0;
 }
@@ -2288,8 +2299,8 @@ static void timehist_print_migration_event(struct perf_sched *sched,
 	if (thread == NULL)
 		return;
 
-	if (timehist_skip_sample(sched, thread) &&
-	    timehist_skip_sample(sched, migrated)) {
+	if (timehist_skip_sample(sched, thread, evsel, sample) &&
+	    timehist_skip_sample(sched, migrated, evsel, sample)) {
 		return;
 	}
 
@@ -2374,7 +2385,7 @@ static int timehist_sched_change_event(struct perf_tool *tool,
 		goto out;
 	}
 
-	if (timehist_skip_sample(sched, thread))
+	if (timehist_skip_sample(sched, thread, evsel, sample))
 		goto out;
 
 	tr = thread__get_runtime(thread);
-- 
2.9.3

^ permalink raw reply related	[flat|nested] 23+ messages in thread

* [PATCH 06/22] perf sched timehist: Add -I/--idle-hist option
  2016-12-13 15:09 [GIT PULL 00/22] perf/core improvements and fixes Arnaldo Carvalho de Melo
                   ` (4 preceding siblings ...)
  2016-12-13 15:09 ` [PATCH 05/22] perf sched timehist: Skip non-idle events when necessary Arnaldo Carvalho de Melo
@ 2016-12-13 15:09 ` Arnaldo Carvalho de Melo
  2016-12-13 15:09 ` [PATCH 07/22] perf sched timehist: Show callchains for idle stat Arnaldo Carvalho de Melo
                   ` (15 subsequent siblings)
  21 siblings, 0 replies; 23+ messages in thread
From: Arnaldo Carvalho de Melo @ 2016-12-13 15:09 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: linux-kernel, Namhyung Kim, Andi Kleen, Jiri Olsa, Minchan Kim,
	Peter Zijlstra, Arnaldo Carvalho de Melo

From: Namhyung Kim <namhyung@kernel.org>

The --idle-hist option is to analyze system idle state so which process
makes cpu to go idle.  If this option is specified, non-idle events will
be skipped and processes switching to/from idle will be shown.

This option is mostly useful when used with --summary(-only) option.  In
the idle-time summary view, idle time is accounted to previous thread
which is run before idle task.

The example output looks like following:

  Idle-time summary
                  comm parent sched-out idle-time min-idle avg-idle max-idle stddev migrations
                                (count)    (msec)   (msec)   (msec)   (msec)      %
  --------------------------------------------------------------------------------------------
        rcu_preempt[7]      2        95   550.872    0.011    5.798   23.146   7.63      0
       migration/1[16]      2         1    15.558   15.558   15.558   15.558   0.00      0
        khugepaged[39]      2         1     3.062    3.062    3.062    3.062   0.00      0
     kworker/0:1H[124]      2         2     4.728    0.611    2.364    4.116  74.12      0
  systemd-journal[167]      1         1     4.510    4.510    4.510    4.510   0.00      0
    kworker/u16:3[558]      2        13    74.737    0.080    5.749   12.960  21.96      0
   irq/34-iwlwifi[628]      2        21   118.403    0.032    5.638   23.990  24.00      0
    kworker/u17:0[673]      2         1     3.523    3.523    3.523    3.523   0.00      0
      dbus-daemon[722]      1         1     6.743    6.743    6.743    6.743   0.00      0
          ifplugd[741]      1         1    58.826   58.826   58.826   58.826   0.00      0
  wpa_supplicant[1490]      1         1    13.302   13.302   13.302   13.302   0.00      0
     wpa_actiond[1492]      1         2     4.064    0.168    2.032    3.896  91.72      0
         dockerd[1500]      1         1     0.055    0.055    0.055    0.055   0.00      0
  ...

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: David Ahern <dsahern@gmail.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20161208144755.16673-6-namhyung@kernel.org
Link: http://lkml.kernel.org/r/20161213080632.19099-2-namhyung@kernel.org
[ Merged fix sent by Namhyumg, as posted in the second Link: tag ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/Documentation/perf-sched.txt |  4 +++
 tools/perf/builtin-sched.c              | 46 +++++++++++++++++++++++++++++----
 2 files changed, 45 insertions(+), 5 deletions(-)

diff --git a/tools/perf/Documentation/perf-sched.txt b/tools/perf/Documentation/perf-sched.txt
index 7775b1eb2bee..76173969ab80 100644
--- a/tools/perf/Documentation/perf-sched.txt
+++ b/tools/perf/Documentation/perf-sched.txt
@@ -132,6 +132,10 @@ OPTIONS for 'perf sched timehist'
 --migrations::
 	Show migration events.
 
+-I::
+--idle-hist::
+	Show idle-related events only.
+
 --time::
 	Only analyze samples within given time window: <start>,<stop>. Times
 	have the format seconds.microseconds. If start is not given (i.e., time
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index c8e7848e71a7..0b14265432df 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -2421,7 +2421,36 @@ static int timehist_sched_change_event(struct perf_tool *tool,
 			t = ptime->end;
 	}
 
-	timehist_update_runtime_stats(tr, t, tprev);
+	if (!sched->idle_hist || thread->tid == 0) {
+		timehist_update_runtime_stats(tr, t, tprev);
+
+		if (sched->idle_hist) {
+			struct idle_thread_runtime *itr = (void *)tr;
+			struct thread_runtime *last_tr;
+
+			BUG_ON(thread->tid != 0);
+
+			if (itr->last_thread == NULL)
+				goto out;
+
+			/* add current idle time as last thread's runtime */
+			last_tr = thread__get_runtime(itr->last_thread);
+			if (last_tr == NULL)
+				goto out;
+
+			timehist_update_runtime_stats(last_tr, t, tprev);
+			/*
+			 * remove delta time of last thread as it's not updated
+			 * and otherwise it will show an invalid value next
+			 * time.  we only care total run time and run stat.
+			 */
+			last_tr->dt_run = 0;
+			last_tr->dt_wait = 0;
+			last_tr->dt_delay = 0;
+
+			itr->last_thread = NULL;
+		}
+	}
 
 	if (!sched->summary_only)
 		timehist_print_sample(sched, sample, &al, thread, t);
@@ -2543,9 +2572,15 @@ static void timehist_print_summary(struct perf_sched *sched,
 	if (comm_width < 30)
 		comm_width = 30;
 
-	printf("\nRuntime summary\n");
-	printf("%*s  parent   sched-in  ", comm_width, "comm");
-	printf("   run-time    min-run     avg-run     max-run  stddev  migrations\n");
+	if (sched->idle_hist) {
+		printf("\nIdle-time summary\n");
+		printf("%*s  parent  sched-out  ", comm_width, "comm");
+		printf("  idle-time   min-idle    avg-idle    max-idle  stddev  migrations\n");
+	} else {
+		printf("\nRuntime summary\n");
+		printf("%*s  parent   sched-in  ", comm_width, "comm");
+		printf("   run-time    min-run     avg-run     max-run  stddev  migrations\n");
+	}
 	printf("%*s            (count)  ", comm_width, "");
 	printf("     (msec)     (msec)      (msec)      (msec)       %%\n");
 	printf("%.117s\n", graph_dotted_line);
@@ -2561,7 +2596,7 @@ static void timehist_print_summary(struct perf_sched *sched,
 		printf("<no terminated tasks>\n");
 
 	/* CPU idle stats not tracked when samples were skipped */
-	if (sched->skipped_samples)
+	if (sched->skipped_samples && !sched->idle_hist)
 		return;
 
 	printf("\nIdle stats:\n");
@@ -3107,6 +3142,7 @@ int cmd_sched(int argc, const char **argv, const char *prefix __maybe_unused)
 	OPT_BOOLEAN('w', "wakeups", &sched.show_wakeups, "Show wakeup events"),
 	OPT_BOOLEAN('M', "migrations", &sched.show_migrations, "Show migration events"),
 	OPT_BOOLEAN('V', "cpu-visual", &sched.show_cpu_visual, "Add CPU visual"),
+	OPT_BOOLEAN('I', "idle-hist", &sched.idle_hist, "Show idle events only"),
 	OPT_STRING(0, "time", &sched.time_str, "str",
 		   "Time span for analysis (start,stop)"),
 	OPT_PARENT(sched_options)
-- 
2.9.3

^ permalink raw reply related	[flat|nested] 23+ messages in thread

* [PATCH 07/22] perf sched timehist: Show callchains for idle stat
  2016-12-13 15:09 [GIT PULL 00/22] perf/core improvements and fixes Arnaldo Carvalho de Melo
                   ` (5 preceding siblings ...)
  2016-12-13 15:09 ` [PATCH 06/22] perf sched timehist: Add -I/--idle-hist option Arnaldo Carvalho de Melo
@ 2016-12-13 15:09 ` Arnaldo Carvalho de Melo
  2016-12-13 15:09 ` [PATCH 08/22] tools lib bpf: Sync {tools,}/include/uapi/linux/bpf.h Arnaldo Carvalho de Melo
                   ` (14 subsequent siblings)
  21 siblings, 0 replies; 23+ messages in thread
From: Arnaldo Carvalho de Melo @ 2016-12-13 15:09 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: linux-kernel, Namhyung Kim, Andi Kleen, Jiri Olsa, Minchan Kim,
	Peter Zijlstra, Arnaldo Carvalho de Melo

From: Namhyung Kim <namhyung@kernel.org>

When --idle-hist option is used with --summary, it now shows idle stats
with callchains like below:

  Idle stats by callchain:
  CPU  0:   902.195 msec
  Idle time (msec)    Count Callchains
  ----------------  ------- --------------------------------------------------
           370.589       69 futex_wait_queue_me <- futex_wait <- do_futex <- sys_futex <- entry_SYSCALL_64_fastpath
           178.799       17 worker_thread <- kthread <- ret_from_fork
           128.352       17 schedule_timeout <- rcu_gp_kthread <- kthread <- ret_from_fork
           125.111       19 schedule_hrtimeout_range_clock <- schedule_hrtimeout_range <- poll_schedule_timeout <- do_select <- core_sys_select
            71.599       50 schedule_hrtimeout_range_clock <- schedule_hrtimeout_range <- poll_schedule_timeout <- do_sys_poll <- sys_poll
            23.146        1 rcu_gp_kthread <- kthread <- ret_from_fork
             4.510        1 schedule_hrtimeout_range_clock <- schedule_hrtimeout_range <- ep_poll <- sys_epoll_wait <- do_syscall_64
             0.085        1 schedule_hrtimeout_range_clock <- schedule_hrtimeout_range <- poll_schedule_timeout <- do_sys_poll <- do_restart_poll
  ...

Committer notes:

Extra testing:

  # uname -a
  Linux jouet 4.8.8-300.fc25.x86_64 #1 SMP Tue Nov 15 18:10:06 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

1) Run 'perf sched record -g'

2) Run 'perf sched timehist --idle --summary'

<SNIP>
  Idle stats by callchain:
  CPU  0: 13456.840 msec
  Idle time (msec) Count Callchains
  ---------------- ----- --------------------------------------------------
          5386.637  3283 schedule_hrtimeout_range_clock <- schedule_hrtimeout_range <- poll_schedule_timeout <- do_sys_poll <- sys_poll
          2750.238  2299 futex_wait_queue_me <- futex_wait <- do_futex <- sys_futex <- do_syscall_64
          1275.672  1287 schedule_hrtimeout_range_clock <- schedule_hrtimeout_range <- ep_poll <- sys_epoll_wait <- entry_SYSCALL_64_fastpath
           936.322   452 worker_thread <- kthread <- ret_from_fork
           741.311   385 rcu_nocb_kthread <- kthread <- ret_from_fork
           729.385   248 schedule_hrtimeout_range_clock <- schedule_hrtimeout_range <- poll_schedule_timeout <- do_sys_poll <- sys_ppoll
           365.386   229 irq_thread <- kthread <- ret_from_fork
           338.934   265 futex_wait_queue_me <- futex_wait <- do_futex <- sys_futex <- entry_SYSCALL_64_fastpath
           219.488   201 schedule_timeout <- rcu_gp_kthread <- kthread <- ret_from_fork
           186.839   410 schedule_hrtimeout_range_clock <- schedule_hrtimeout_range <- ep_poll <- sys_epoll_wait <- do_syscall_64
           142.541    59 kvm_vcpu_block <- kvm_arch_vcpu_ioctl_run <- kvm_vcpu_ioctl <- do_vfs_ioctl <- sys_ioctl
            83.887    92 smpboot_thread_fn <- kthread <- ret_from_fork
            62.722    96 do_exit <- do_group_exit <- 0x2a5594 <- entry_SYSCALL_64_fastpath
            47.894    83 pipe_wait <- pipe_read <- __vfs_read <- vfs_read <- sys_read
            46.554    61 rcu_gp_kthread <- kthread <- ret_from_fork
            34.337    21 schedule_timeout <- intel_fbc_work_fn <- process_one_work <- worker_thread <- kthread
            29.521    14 schedule_hrtimeout_range_clock <- schedule_hrtimeout_range <- poll_schedule_timeout <- do_select <- core_sys_select
            20.274    10 schedule_timeout <- io_schedule_timeout <- bit_wait_io <- __wait_on_bit <- out_of_line_wait_on_bit
            15.085    55 schedule_timeout <- unix_stream_read_generic <- unix_stream_recvmsg <- sock_recvmsg <- SYSC_recvfrom
<SNIP>

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: David Ahern <dsahern@gmail.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20161208144755.16673-7-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/builtin-sched.c | 86 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)

diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index 0b14265432df..c1c07bfe132c 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -2448,6 +2448,9 @@ static int timehist_sched_change_event(struct perf_tool *tool,
 			last_tr->dt_wait = 0;
 			last_tr->dt_delay = 0;
 
+			if (itr->cursor.nr)
+				callchain_append(&itr->callchain, &itr->cursor, t - tprev);
+
 			itr->last_thread = NULL;
 		}
 	}
@@ -2557,6 +2560,60 @@ static int show_deadthread_runtime(struct thread *t, void *priv)
 	return __show_thread_runtime(t, priv);
 }
 
+static size_t callchain__fprintf_folded(FILE *fp, struct callchain_node *node)
+{
+	const char *sep = " <- ";
+	struct callchain_list *chain;
+	size_t ret = 0;
+	char bf[1024];
+	bool first;
+
+	if (node == NULL)
+		return 0;
+
+	ret = callchain__fprintf_folded(fp, node->parent);
+	first = (ret == 0);
+
+	list_for_each_entry(chain, &node->val, list) {
+		if (chain->ip >= PERF_CONTEXT_MAX)
+			continue;
+		if (chain->ms.sym && chain->ms.sym->ignore)
+			continue;
+		ret += fprintf(fp, "%s%s", first ? "" : sep,
+			       callchain_list__sym_name(chain, bf, sizeof(bf),
+							false));
+		first = false;
+	}
+
+	return ret;
+}
+
+static size_t timehist_print_idlehist_callchain(struct rb_root *root)
+{
+	size_t ret = 0;
+	FILE *fp = stdout;
+	struct callchain_node *chain;
+	struct rb_node *rb_node = rb_first(root);
+
+	printf("  %16s  %8s  %s\n", "Idle time (msec)", "Count", "Callchains");
+	printf("  %.16s  %.8s  %.50s\n", graph_dotted_line, graph_dotted_line,
+	       graph_dotted_line);
+
+	while (rb_node) {
+		chain = rb_entry(rb_node, struct callchain_node, rb_node);
+		rb_node = rb_next(rb_node);
+
+		ret += fprintf(fp, "  ");
+		print_sched_time(chain->hit, 12);
+		ret += 16;  /* print_sched_time returns 2nd arg + 4 */
+		ret += fprintf(fp, " %8d  ", chain->count);
+		ret += callchain__fprintf_folded(fp, chain);
+		ret += fprintf(fp, "\n");
+	}
+
+	return ret;
+}
+
 static void timehist_print_summary(struct perf_sched *sched,
 				   struct perf_session *session)
 {
@@ -2615,6 +2672,35 @@ static void timehist_print_summary(struct perf_sched *sched,
 			printf("    CPU %2d idle entire time window\n", i);
 	}
 
+	if (sched->idle_hist && symbol_conf.use_callchain) {
+		callchain_param.mode  = CHAIN_FOLDED;
+		callchain_param.value = CCVAL_PERIOD;
+
+		callchain_register_param(&callchain_param);
+
+		printf("\nIdle stats by callchain:\n");
+		for (i = 0; i < idle_max_cpu; ++i) {
+			struct idle_thread_runtime *itr;
+
+			t = idle_threads[i];
+			if (!t)
+				continue;
+
+			itr = thread__priv(t);
+			if (itr == NULL)
+				continue;
+
+			callchain_param.sort(&itr->sorted_root, &itr->callchain,
+					     0, &callchain_param);
+
+			printf("  CPU %2d:", i);
+			print_sched_time(itr->tr.total_run_time, 6);
+			printf(" msec\n");
+			timehist_print_idlehist_callchain(&itr->sorted_root);
+			printf("\n");
+		}
+	}
+
 	printf("\n"
 	       "    Total number of unique tasks: %" PRIu64 "\n"
 	       "Total number of context switches: %" PRIu64 "\n"
-- 
2.9.3

^ permalink raw reply related	[flat|nested] 23+ messages in thread

* [PATCH 08/22] tools lib bpf: Sync {tools,}/include/uapi/linux/bpf.h
  2016-12-13 15:09 [GIT PULL 00/22] perf/core improvements and fixes Arnaldo Carvalho de Melo
                   ` (6 preceding siblings ...)
  2016-12-13 15:09 ` [PATCH 07/22] perf sched timehist: Show callchains for idle stat Arnaldo Carvalho de Melo
@ 2016-12-13 15:09 ` Arnaldo Carvalho de Melo
  2016-12-13 15:09 ` [PATCH 09/22] tools lib bpf: use __u32 from linux/types.h Arnaldo Carvalho de Melo
                   ` (13 subsequent siblings)
  21 siblings, 0 replies; 23+ messages in thread
From: Arnaldo Carvalho de Melo @ 2016-12-13 15:09 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: linux-kernel, Joe Stringer, Alexei Starovoitov, Daniel Borkmann,
	Arnaldo Carvalho de Melo

From: Joe Stringer <joe@ovn.org>

The tools version of this header is out of date; update it to the latest
version from the kernel headers.

Signed-off-by: Joe Stringer <joe@ovn.org>
Acked-by: Wang Nan <wangnan0@huawei.com>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Link: http://lkml.kernel.org/r/20161209024620.31660-2-joe@ovn.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/include/uapi/linux/bpf.h | 51 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)

diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index 9e5fc168c8a3..f09c70b97eca 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -95,6 +95,7 @@ enum bpf_prog_type {
 	BPF_PROG_TYPE_SCHED_ACT,
 	BPF_PROG_TYPE_TRACEPOINT,
 	BPF_PROG_TYPE_XDP,
+	BPF_PROG_TYPE_PERF_EVENT,
 };
 
 #define BPF_PSEUDO_MAP_FD	1
@@ -375,6 +376,56 @@ enum bpf_func_id {
 	 */
 	BPF_FUNC_probe_write_user,
 
+	/**
+	 * bpf_current_task_under_cgroup(map, index) - Check cgroup2 membership of current task
+	 * @map: pointer to bpf_map in BPF_MAP_TYPE_CGROUP_ARRAY type
+	 * @index: index of the cgroup in the bpf_map
+	 * Return:
+	 *   == 0 current failed the cgroup2 descendant test
+	 *   == 1 current succeeded the cgroup2 descendant test
+	 *    < 0 error
+	 */
+	BPF_FUNC_current_task_under_cgroup,
+
+	/**
+	 * bpf_skb_change_tail(skb, len, flags)
+	 * The helper will resize the skb to the given new size,
+	 * to be used f.e. with control messages.
+	 * @skb: pointer to skb
+	 * @len: new skb length
+	 * @flags: reserved
+	 * Return: 0 on success or negative error
+	 */
+	BPF_FUNC_skb_change_tail,
+
+	/**
+	 * bpf_skb_pull_data(skb, len)
+	 * The helper will pull in non-linear data in case the
+	 * skb is non-linear and not all of len are part of the
+	 * linear section. Only needed for read/write with direct
+	 * packet access.
+	 * @skb: pointer to skb
+	 * @len: len to make read/writeable
+	 * Return: 0 on success or negative error
+	 */
+	BPF_FUNC_skb_pull_data,
+
+	/**
+	 * bpf_csum_update(skb, csum)
+	 * Adds csum into skb->csum in case of CHECKSUM_COMPLETE.
+	 * @skb: pointer to skb
+	 * @csum: csum to add
+	 * Return: csum on success or negative error
+	 */
+	BPF_FUNC_csum_update,
+
+	/**
+	 * bpf_set_hash_invalid(skb)
+	 * Invalidate current skb>hash.
+	 * @skb: pointer to skb
+	 */
+	BPF_FUNC_set_hash_invalid,
+
 	__BPF_FUNC_MAX_ID,
 };
 
-- 
2.9.3

^ permalink raw reply related	[flat|nested] 23+ messages in thread

* [PATCH 09/22] tools lib bpf: use __u32 from linux/types.h
  2016-12-13 15:09 [GIT PULL 00/22] perf/core improvements and fixes Arnaldo Carvalho de Melo
                   ` (7 preceding siblings ...)
  2016-12-13 15:09 ` [PATCH 08/22] tools lib bpf: Sync {tools,}/include/uapi/linux/bpf.h Arnaldo Carvalho de Melo
@ 2016-12-13 15:09 ` Arnaldo Carvalho de Melo
  2016-12-13 15:09 ` [PATCH 10/22] tools lib bpf: Add flags to bpf_create_map() Arnaldo Carvalho de Melo
                   ` (12 subsequent siblings)
  21 siblings, 0 replies; 23+ messages in thread
From: Arnaldo Carvalho de Melo @ 2016-12-13 15:09 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: linux-kernel, Joe Stringer, Alexei Starovoitov, Daniel Borkmann,
	Arnaldo Carvalho de Melo

From: Joe Stringer <joe@ovn.org>

Fixes the following issue when building without access to 'u32' type:

./tools/lib/bpf/bpf.h:27:23: error: unknown type name ‘u32’

Signed-off-by: Joe Stringer <joe@ovn.org>
Acked-by: Wang Nan <wangnan0@huawei.com>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Link: http://lkml.kernel.org/r/20161209024620.31660-3-joe@ovn.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/lib/bpf/bpf.c | 4 ++--
 tools/lib/bpf/bpf.h | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 8143536b462a..89e8e8e5b60e 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -70,7 +70,7 @@ int bpf_create_map(enum bpf_map_type map_type, int key_size,
 
 int bpf_load_program(enum bpf_prog_type type, struct bpf_insn *insns,
 		     size_t insns_cnt, char *license,
-		     u32 kern_version, char *log_buf, size_t log_buf_sz)
+		     __u32 kern_version, char *log_buf, size_t log_buf_sz)
 {
 	int fd;
 	union bpf_attr attr;
@@ -98,7 +98,7 @@ int bpf_load_program(enum bpf_prog_type type, struct bpf_insn *insns,
 }
 
 int bpf_map_update_elem(int fd, void *key, void *value,
-			u64 flags)
+			__u64 flags)
 {
 	union bpf_attr attr;
 
diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h
index 253c3dbb06b4..61130170a6ad 100644
--- a/tools/lib/bpf/bpf.h
+++ b/tools/lib/bpf/bpf.h
@@ -30,11 +30,11 @@ int bpf_create_map(enum bpf_map_type map_type, int key_size, int value_size,
 #define BPF_LOG_BUF_SIZE 65536
 int bpf_load_program(enum bpf_prog_type type, struct bpf_insn *insns,
 		     size_t insns_cnt, char *license,
-		     u32 kern_version, char *log_buf,
+		     __u32 kern_version, char *log_buf,
 		     size_t log_buf_sz);
 
 int bpf_map_update_elem(int fd, void *key, void *value,
-			u64 flags);
+			__u64 flags);
 
 int bpf_map_lookup_elem(int fd, void *key, void *value);
 int bpf_map_delete_elem(int fd, void *key);
-- 
2.9.3

^ permalink raw reply related	[flat|nested] 23+ messages in thread

* [PATCH 10/22] tools lib bpf: Add flags to bpf_create_map()
  2016-12-13 15:09 [GIT PULL 00/22] perf/core improvements and fixes Arnaldo Carvalho de Melo
                   ` (8 preceding siblings ...)
  2016-12-13 15:09 ` [PATCH 09/22] tools lib bpf: use __u32 from linux/types.h Arnaldo Carvalho de Melo
@ 2016-12-13 15:09 ` Arnaldo Carvalho de Melo
  2016-12-13 15:09 ` [PATCH 11/22] samples/bpf: Make samples more libbpf-centric Arnaldo Carvalho de Melo
                   ` (11 subsequent siblings)
  21 siblings, 0 replies; 23+ messages in thread
From: Arnaldo Carvalho de Melo @ 2016-12-13 15:09 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: linux-kernel, Joe Stringer, Alexei Starovoitov, Daniel Borkmann,
	Arnaldo Carvalho de Melo

From: Joe Stringer <joe@ovn.org>

Commit 6c905981743 ("bpf: pre-allocate hash map elements") introduces
map_flags to bpf_attr for BPF_MAP_CREATE command. Expose this new
parameter in libbpf.

By exposing it, users can access flags such as whether or not to
preallocate the map.

Signed-off-by: Joe Stringer <joe@ovn.org>
Acked-by: Wang Nan <wangnan0@huawei.com>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Link: http://lkml.kernel.org/r/20161209024620.31660-4-joe@ovn.org
[ Added clarifying comment made by Wang Nan ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/lib/bpf/bpf.c    | 3 ++-
 tools/lib/bpf/bpf.h    | 2 +-
 tools/lib/bpf/libbpf.c | 3 ++-
 3 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 89e8e8e5b60e..d0afb26c2e0f 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -54,7 +54,7 @@ static int sys_bpf(enum bpf_cmd cmd, union bpf_attr *attr,
 }
 
 int bpf_create_map(enum bpf_map_type map_type, int key_size,
-		   int value_size, int max_entries)
+		   int value_size, int max_entries, __u32 map_flags)
 {
 	union bpf_attr attr;
 
@@ -64,6 +64,7 @@ int bpf_create_map(enum bpf_map_type map_type, int key_size,
 	attr.key_size = key_size;
 	attr.value_size = value_size;
 	attr.max_entries = max_entries;
+	attr.map_flags = map_flags;
 
 	return sys_bpf(BPF_MAP_CREATE, &attr, sizeof(attr));
 }
diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h
index 61130170a6ad..7fcdce16fd62 100644
--- a/tools/lib/bpf/bpf.h
+++ b/tools/lib/bpf/bpf.h
@@ -24,7 +24,7 @@
 #include <linux/bpf.h>
 
 int bpf_create_map(enum bpf_map_type map_type, int key_size, int value_size,
-		   int max_entries);
+		   int max_entries, __u32 map_flags);
 
 /* Recommend log buffer size */
 #define BPF_LOG_BUF_SIZE 65536
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 2e974593f3e8..84e6b35da4bd 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -854,7 +854,8 @@ bpf_object__create_maps(struct bpf_object *obj)
 		*pfd = bpf_create_map(def->type,
 				      def->key_size,
 				      def->value_size,
-				      def->max_entries);
+				      def->max_entries,
+				      0);
 		if (*pfd < 0) {
 			size_t j;
 			int err = *pfd;
-- 
2.9.3

^ permalink raw reply related	[flat|nested] 23+ messages in thread

* [PATCH 11/22] samples/bpf: Make samples more libbpf-centric
  2016-12-13 15:09 [GIT PULL 00/22] perf/core improvements and fixes Arnaldo Carvalho de Melo
                   ` (9 preceding siblings ...)
  2016-12-13 15:09 ` [PATCH 10/22] tools lib bpf: Add flags to bpf_create_map() Arnaldo Carvalho de Melo
@ 2016-12-13 15:09 ` Arnaldo Carvalho de Melo
  2016-12-13 15:09 ` [PATCH 12/22] samples/bpf: Switch over to libbpf Arnaldo Carvalho de Melo
                   ` (10 subsequent siblings)
  21 siblings, 0 replies; 23+ messages in thread
From: Arnaldo Carvalho de Melo @ 2016-12-13 15:09 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: linux-kernel, Joe Stringer, Alexei Starovoitov, Daniel Borkmann,
	Wang Nan, Arnaldo Carvalho de Melo

From: Joe Stringer <joe@ovn.org>

Switch all of the sample code to use the function names from
tools/lib/bpf so that they're consistent with that, and to declare their
own log buffers. This allow the next commit to be purely devoted to
getting rid of the duplicate library in samples/bpf.

Signed-off-by: Joe Stringer <joe@ovn.org>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/20161209024620.31660-5-joe@ovn.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 samples/bpf/bpf_load.c                            |  17 ++-
 samples/bpf/fds_example.c                         |   9 +-
 samples/bpf/lathist_user.c                        |   3 +-
 samples/bpf/libbpf.c                              |  23 ++--
 samples/bpf/libbpf.h                              |  18 +--
 samples/bpf/map_perf_test_user.c                  |   1 +
 samples/bpf/offwaketime_user.c                    |  10 +-
 samples/bpf/sampleip_user.c                       |   5 +-
 samples/bpf/sock_example.c                        |  10 +-
 samples/bpf/sockex1_user.c                        |   8 +-
 samples/bpf/sockex2_user.c                        |   6 +-
 samples/bpf/sockex3_user.c                        |   6 +-
 samples/bpf/spintest_user.c                       |  10 +-
 samples/bpf/tc_l2_redirect_user.c                 |   4 +-
 samples/bpf/test_cgrp2_array_pin.c                |   4 +-
 samples/bpf/test_current_task_under_cgroup_user.c |  10 +-
 samples/bpf/test_maps.c                           | 142 +++++++++++-----------
 samples/bpf/test_overhead_user.c                  |   2 +
 samples/bpf/test_probe_write_user_user.c          |   4 +-
 samples/bpf/test_verifier.c                       |   8 +-
 samples/bpf/trace_event_user.c                    |  15 +--
 samples/bpf/trace_output_user.c                   |   3 +-
 samples/bpf/tracex1_user.c                        |   2 +
 samples/bpf/tracex2_user.c                        |  12 +-
 samples/bpf/tracex3_user.c                        |   6 +-
 samples/bpf/tracex4_user.c                        |   6 +-
 samples/bpf/tracex5_user.c                        |   2 +
 samples/bpf/tracex6_user.c                        |   4 +-
 samples/bpf/xdp1_user.c                           |   4 +-
 29 files changed, 200 insertions(+), 154 deletions(-)

diff --git a/samples/bpf/bpf_load.c b/samples/bpf/bpf_load.c
index 97913e109b14..f8e3c58a0897 100644
--- a/samples/bpf/bpf_load.c
+++ b/samples/bpf/bpf_load.c
@@ -18,7 +18,6 @@
 #include <poll.h>
 #include <ctype.h>
 #include "libbpf.h"
-#include "bpf_helpers.h"
 #include "bpf_load.h"
 
 #define DEBUGFS "/sys/kernel/debug/tracing/"
@@ -26,17 +25,26 @@
 static char license[128];
 static int kern_version;
 static bool processed_sec[128];
+char bpf_log_buf[BPF_LOG_BUF_SIZE];
 int map_fd[MAX_MAPS];
 int prog_fd[MAX_PROGS];
 int event_fd[MAX_PROGS];
 int prog_cnt;
 int prog_array_fd = -1;
 
+struct bpf_map_def {
+	unsigned int type;
+	unsigned int key_size;
+	unsigned int value_size;
+	unsigned int max_entries;
+	unsigned int map_flags;
+};
+
 static int populate_prog_array(const char *event, int prog_fd)
 {
 	int ind = atoi(event), err;
 
-	err = bpf_update_elem(prog_array_fd, &ind, &prog_fd, BPF_ANY);
+	err = bpf_map_update_elem(prog_array_fd, &ind, &prog_fd, BPF_ANY);
 	if (err < 0) {
 		printf("failed to store prog_fd in prog_array\n");
 		return -1;
@@ -77,9 +85,10 @@ static int load_and_attach(const char *event, struct bpf_insn *prog, int size)
 		return -1;
 	}
 
-	fd = bpf_prog_load(prog_type, prog, size, license, kern_version);
+	fd = bpf_load_program(prog_type, prog, size, license, kern_version,
+			      NULL, 0);
 	if (fd < 0) {
-		printf("bpf_prog_load() err=%d\n%s", errno, bpf_log_buf);
+		printf("bpf_load_program() err=%d\n%s", errno, bpf_log_buf);
 		return -1;
 	}
 
diff --git a/samples/bpf/fds_example.c b/samples/bpf/fds_example.c
index 625e797be6ef..4ffd8f340496 100644
--- a/samples/bpf/fds_example.c
+++ b/samples/bpf/fds_example.c
@@ -58,8 +58,9 @@ static int bpf_prog_create(const char *object)
 		assert(!load_bpf_file((char *)object));
 		return prog_fd[0];
 	} else {
-		return bpf_prog_load(BPF_PROG_TYPE_SOCKET_FILTER,
-				     insns, sizeof(insns), "GPL", 0);
+		return bpf_load_program(BPF_PROG_TYPE_SOCKET_FILTER,
+					insns, sizeof(insns), "GPL", 0, NULL,
+					0);
 	}
 }
 
@@ -83,12 +84,12 @@ static int bpf_do_map(const char *file, uint32_t flags, uint32_t key,
 	}
 
 	if ((flags & BPF_F_KEY_VAL) == BPF_F_KEY_VAL) {
-		ret = bpf_update_elem(fd, &key, &value, 0);
+		ret = bpf_map_update_elem(fd, &key, &value, 0);
 		printf("bpf: fd:%d u->(%u:%u) ret:(%d,%s)\n", fd, key, value,
 		       ret, strerror(errno));
 		assert(ret == 0);
 	} else if (flags & BPF_F_KEY) {
-		ret = bpf_lookup_elem(fd, &key, &value);
+		ret = bpf_map_lookup_elem(fd, &key, &value);
 		printf("bpf: fd:%d l->(%u):%u ret:(%d,%s)\n", fd, key, value,
 		       ret, strerror(errno));
 		assert(ret == 0);
diff --git a/samples/bpf/lathist_user.c b/samples/bpf/lathist_user.c
index 65da8c1576de..bcdee00816b2 100644
--- a/samples/bpf/lathist_user.c
+++ b/samples/bpf/lathist_user.c
@@ -23,6 +23,7 @@ struct cpu_hist {
 };
 
 static struct cpu_hist cpu_hist[MAX_CPU];
+char bpf_log_buf[BPF_LOG_BUF_SIZE];
 
 static void stars(char *str, long val, long max, int width)
 {
@@ -73,7 +74,7 @@ static void get_data(int fd)
 	for (c = 0; c < MAX_CPU; c++) {
 		for (i = 0; i < MAX_ENTRIES; i++) {
 			key = c * MAX_ENTRIES + i;
-			bpf_lookup_elem(fd, &key, &value);
+			bpf_map_lookup_elem(fd, &key, &value);
 
 			cpu_hist[c].data[i] = value;
 			if (value > cpu_hist[c].max)
diff --git a/samples/bpf/libbpf.c b/samples/bpf/libbpf.c
index 9969e35550c3..e5c5a69996fc 100644
--- a/samples/bpf/libbpf.c
+++ b/samples/bpf/libbpf.c
@@ -32,7 +32,7 @@ int bpf_create_map(enum bpf_map_type map_type, int key_size, int value_size,
 	return syscall(__NR_bpf, BPF_MAP_CREATE, &attr, sizeof(attr));
 }
 
-int bpf_update_elem(int fd, void *key, void *value, unsigned long long flags)
+int bpf_map_update_elem(int fd, void *key, void *value, unsigned long long flags)
 {
 	union bpf_attr attr = {
 		.map_fd = fd,
@@ -44,7 +44,7 @@ int bpf_update_elem(int fd, void *key, void *value, unsigned long long flags)
 	return syscall(__NR_bpf, BPF_MAP_UPDATE_ELEM, &attr, sizeof(attr));
 }
 
-int bpf_lookup_elem(int fd, void *key, void *value)
+int bpf_map_lookup_elem(int fd, void *key, void *value)
 {
 	union bpf_attr attr = {
 		.map_fd = fd,
@@ -55,7 +55,7 @@ int bpf_lookup_elem(int fd, void *key, void *value)
 	return syscall(__NR_bpf, BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr));
 }
 
-int bpf_delete_elem(int fd, void *key)
+int bpf_map_delete_elem(int fd, void *key)
 {
 	union bpf_attr attr = {
 		.map_fd = fd,
@@ -65,7 +65,7 @@ int bpf_delete_elem(int fd, void *key)
 	return syscall(__NR_bpf, BPF_MAP_DELETE_ELEM, &attr, sizeof(attr));
 }
 
-int bpf_get_next_key(int fd, void *key, void *next_key)
+int bpf_map_get_next_key(int fd, void *key, void *next_key)
 {
 	union bpf_attr attr = {
 		.map_fd = fd,
@@ -78,19 +78,18 @@ int bpf_get_next_key(int fd, void *key, void *next_key)
 
 #define ROUND_UP(x, n) (((x) + (n) - 1u) & ~((n) - 1u))
 
-char bpf_log_buf[LOG_BUF_SIZE];
-
-int bpf_prog_load(enum bpf_prog_type prog_type,
-		  const struct bpf_insn *insns, int prog_len,
-		  const char *license, int kern_version)
+int bpf_load_program(enum bpf_prog_type prog_type,
+		     const struct bpf_insn *insns, int prog_len,
+		     const char *license, int kern_version,
+		     char *log_buf, size_t log_buf_sz)
 {
 	union bpf_attr attr = {
 		.prog_type = prog_type,
 		.insns = ptr_to_u64((void *) insns),
 		.insn_cnt = prog_len / sizeof(struct bpf_insn),
 		.license = ptr_to_u64((void *) license),
-		.log_buf = ptr_to_u64(bpf_log_buf),
-		.log_size = LOG_BUF_SIZE,
+		.log_buf = ptr_to_u64(log_buf),
+		.log_size = log_buf_sz,
 		.log_level = 1,
 	};
 
@@ -99,7 +98,7 @@ int bpf_prog_load(enum bpf_prog_type prog_type,
 	 */
 	attr.kern_version = kern_version;
 
-	bpf_log_buf[0] = 0;
+	log_buf[0] = 0;
 
 	return syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
 }
diff --git a/samples/bpf/libbpf.h b/samples/bpf/libbpf.h
index ac6edb61b64a..1325152be4cd 100644
--- a/samples/bpf/libbpf.h
+++ b/samples/bpf/libbpf.h
@@ -6,20 +6,20 @@ struct bpf_insn;
 
 int bpf_create_map(enum bpf_map_type map_type, int key_size, int value_size,
 		   int max_entries, int map_flags);
-int bpf_update_elem(int fd, void *key, void *value, unsigned long long flags);
-int bpf_lookup_elem(int fd, void *key, void *value);
-int bpf_delete_elem(int fd, void *key);
-int bpf_get_next_key(int fd, void *key, void *next_key);
+int bpf_map_update_elem(int fd, void *key, void *value, unsigned long long flags);
+int bpf_map_lookup_elem(int fd, void *key, void *value);
+int bpf_map_delete_elem(int fd, void *key);
+int bpf_map_get_next_key(int fd, void *key, void *next_key);
 
-int bpf_prog_load(enum bpf_prog_type prog_type,
-		  const struct bpf_insn *insns, int insn_len,
-		  const char *license, int kern_version);
+int bpf_load_program(enum bpf_prog_type prog_type,
+		     const struct bpf_insn *insns, int insn_len,
+		     const char *license, int kern_version,
+		     char *log_buf, size_t log_buf_sz);
 
 int bpf_obj_pin(int fd, const char *pathname);
 int bpf_obj_get(const char *pathname);
 
-#define LOG_BUF_SIZE 65536
-extern char bpf_log_buf[LOG_BUF_SIZE];
+#define BPF_LOG_BUF_SIZE 65536
 
 /* ALU ops on registers, bpf_add|sub|...: dst_reg += src_reg */
 
diff --git a/samples/bpf/map_perf_test_user.c b/samples/bpf/map_perf_test_user.c
index 3147377e8fd3..62ed870590cc 100644
--- a/samples/bpf/map_perf_test_user.c
+++ b/samples/bpf/map_perf_test_user.c
@@ -37,6 +37,7 @@ static __u64 time_get_ns(void)
 #define PERCPU_HASH_KMALLOC	(1 << 3)
 
 static int test_flags = ~0;
+char bpf_log_buf[BPF_LOG_BUF_SIZE];
 
 static void test_hash_prealloc(int cpu)
 {
diff --git a/samples/bpf/offwaketime_user.c b/samples/bpf/offwaketime_user.c
index 6f002a9c24fa..dd2598b1fabc 100644
--- a/samples/bpf/offwaketime_user.c
+++ b/samples/bpf/offwaketime_user.c
@@ -20,6 +20,8 @@
 
 #define PRINT_RAW_ADDR 0
 
+char bpf_log_buf[BPF_LOG_BUF_SIZE];
+
 static void print_ksym(__u64 addr)
 {
 	struct ksym *sym;
@@ -49,14 +51,14 @@ static void print_stack(struct key_t *key, __u64 count)
 	int i;
 
 	printf("%s;", key->target);
-	if (bpf_lookup_elem(map_fd[3], &key->tret, ip) != 0) {
+	if (bpf_map_lookup_elem(map_fd[3], &key->tret, ip) != 0) {
 		printf("---;");
 	} else {
 		for (i = PERF_MAX_STACK_DEPTH - 1; i >= 0; i--)
 			print_ksym(ip[i]);
 	}
 	printf("-;");
-	if (bpf_lookup_elem(map_fd[3], &key->wret, ip) != 0) {
+	if (bpf_map_lookup_elem(map_fd[3], &key->wret, ip) != 0) {
 		printf("---;");
 	} else {
 		for (i = 0; i < PERF_MAX_STACK_DEPTH; i++)
@@ -77,8 +79,8 @@ static void print_stacks(int fd)
 	struct key_t key = {}, next_key;
 	__u64 value;
 
-	while (bpf_get_next_key(fd, &key, &next_key) == 0) {
-		bpf_lookup_elem(fd, &next_key, &value);
+	while (bpf_map_get_next_key(fd, &key, &next_key) == 0) {
+		bpf_map_lookup_elem(fd, &next_key, &value);
 		print_stack(&next_key, value);
 		key = next_key;
 	}
diff --git a/samples/bpf/sampleip_user.c b/samples/bpf/sampleip_user.c
index 260a6bdd6413..09ab620b324c 100644
--- a/samples/bpf/sampleip_user.c
+++ b/samples/bpf/sampleip_user.c
@@ -28,6 +28,7 @@
 #define PAGE_OFFSET	0xffff880000000000
 
 static int nr_cpus;
+char bpf_log_buf[BPF_LOG_BUF_SIZE];
 
 static void usage(void)
 {
@@ -95,8 +96,8 @@ static void print_ip_map(int fd)
 
 	/* fetch IPs and counts */
 	key = 0, i = 0;
-	while (bpf_get_next_key(fd, &key, &next_key) == 0) {
-		bpf_lookup_elem(fd, &next_key, &value);
+	while (bpf_map_get_next_key(fd, &key, &next_key) == 0) {
+		bpf_map_lookup_elem(fd, &next_key, &value);
 		counts[i].ip = next_key;
 		counts[i++].count = value;
 		key = next_key;
diff --git a/samples/bpf/sock_example.c b/samples/bpf/sock_example.c
index 28b60baa9fa8..7ab636c30154 100644
--- a/samples/bpf/sock_example.c
+++ b/samples/bpf/sock_example.c
@@ -55,8 +55,8 @@ static int test_sock(void)
 		BPF_EXIT_INSN(),
 	};
 
-	prog_fd = bpf_prog_load(BPF_PROG_TYPE_SOCKET_FILTER, prog, sizeof(prog),
-				"GPL", 0);
+	prog_fd = bpf_load_program(BPF_PROG_TYPE_SOCKET_FILTER, prog, sizeof(prog),
+				   "GPL", 0, NULL, 0);
 	if (prog_fd < 0) {
 		printf("failed to load prog '%s'\n", strerror(errno));
 		goto cleanup;
@@ -72,13 +72,13 @@ static int test_sock(void)
 
 	for (i = 0; i < 10; i++) {
 		key = IPPROTO_TCP;
-		assert(bpf_lookup_elem(map_fd, &key, &tcp_cnt) == 0);
+		assert(bpf_map_lookup_elem(map_fd, &key, &tcp_cnt) == 0);
 
 		key = IPPROTO_UDP;
-		assert(bpf_lookup_elem(map_fd, &key, &udp_cnt) == 0);
+		assert(bpf_map_lookup_elem(map_fd, &key, &udp_cnt) == 0);
 
 		key = IPPROTO_ICMP;
-		assert(bpf_lookup_elem(map_fd, &key, &icmp_cnt) == 0);
+		assert(bpf_map_lookup_elem(map_fd, &key, &icmp_cnt) == 0);
 
 		printf("TCP %lld UDP %lld ICMP %lld packets\n",
 		       tcp_cnt, udp_cnt, icmp_cnt);
diff --git a/samples/bpf/sockex1_user.c b/samples/bpf/sockex1_user.c
index 678ce4693551..2956d893d732 100644
--- a/samples/bpf/sockex1_user.c
+++ b/samples/bpf/sockex1_user.c
@@ -6,6 +6,8 @@
 #include <unistd.h>
 #include <arpa/inet.h>
 
+char bpf_log_buf[BPF_LOG_BUF_SIZE];
+
 int main(int ac, char **argv)
 {
 	char filename[256];
@@ -32,13 +34,13 @@ int main(int ac, char **argv)
 		int key;
 
 		key = IPPROTO_TCP;
-		assert(bpf_lookup_elem(map_fd[0], &key, &tcp_cnt) == 0);
+		assert(bpf_map_lookup_elem(map_fd[0], &key, &tcp_cnt) == 0);
 
 		key = IPPROTO_UDP;
-		assert(bpf_lookup_elem(map_fd[0], &key, &udp_cnt) == 0);
+		assert(bpf_map_lookup_elem(map_fd[0], &key, &udp_cnt) == 0);
 
 		key = IPPROTO_ICMP;
-		assert(bpf_lookup_elem(map_fd[0], &key, &icmp_cnt) == 0);
+		assert(bpf_map_lookup_elem(map_fd[0], &key, &icmp_cnt) == 0);
 
 		printf("TCP %lld UDP %lld ICMP %lld bytes\n",
 		       tcp_cnt, udp_cnt, icmp_cnt);
diff --git a/samples/bpf/sockex2_user.c b/samples/bpf/sockex2_user.c
index 8a4085c2d117..c43958a67cca 100644
--- a/samples/bpf/sockex2_user.c
+++ b/samples/bpf/sockex2_user.c
@@ -7,6 +7,8 @@
 #include <arpa/inet.h>
 #include <sys/resource.h>
 
+char bpf_log_buf[BPF_LOG_BUF_SIZE];
+
 struct pair {
 	__u64 packets;
 	__u64 bytes;
@@ -39,8 +41,8 @@ int main(int ac, char **argv)
 		int key = 0, next_key;
 		struct pair value;
 
-		while (bpf_get_next_key(map_fd[0], &key, &next_key) == 0) {
-			bpf_lookup_elem(map_fd[0], &next_key, &value);
+		while (bpf_map_get_next_key(map_fd[0], &key, &next_key) == 0) {
+			bpf_map_lookup_elem(map_fd[0], &next_key, &value);
 			printf("ip %s bytes %lld packets %lld\n",
 			       inet_ntoa((struct in_addr){htonl(next_key)}),
 			       value.bytes, value.packets);
diff --git a/samples/bpf/sockex3_user.c b/samples/bpf/sockex3_user.c
index 3fcfd8c4b2a3..2cb9011ea440 100644
--- a/samples/bpf/sockex3_user.c
+++ b/samples/bpf/sockex3_user.c
@@ -7,6 +7,8 @@
 #include <arpa/inet.h>
 #include <sys/resource.h>
 
+char bpf_log_buf[BPF_LOG_BUF_SIZE];
+
 struct bpf_flow_keys {
 	__be32 src;
 	__be32 dst;
@@ -54,8 +56,8 @@ int main(int argc, char **argv)
 
 		sleep(1);
 		printf("IP     src.port -> dst.port               bytes      packets\n");
-		while (bpf_get_next_key(map_fd[2], &key, &next_key) == 0) {
-			bpf_lookup_elem(map_fd[2], &next_key, &value);
+		while (bpf_map_get_next_key(map_fd[2], &key, &next_key) == 0) {
+			bpf_map_lookup_elem(map_fd[2], &next_key, &value);
 			printf("%s.%05d -> %s.%05d %12lld %12lld\n",
 			       inet_ntoa((struct in_addr){htonl(next_key.src)}),
 			       next_key.port16[0],
diff --git a/samples/bpf/spintest_user.c b/samples/bpf/spintest_user.c
index 311ede532230..8950a3d27a92 100644
--- a/samples/bpf/spintest_user.c
+++ b/samples/bpf/spintest_user.c
@@ -7,6 +7,8 @@
 #include "libbpf.h"
 #include "bpf_load.h"
 
+char bpf_log_buf[BPF_LOG_BUF_SIZE];
+
 int main(int ac, char **argv)
 {
 	struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
@@ -31,8 +33,8 @@ int main(int ac, char **argv)
 	for (i = 0; i < 5; i++) {
 		key = 0;
 		printf("kprobing funcs:");
-		while (bpf_get_next_key(map_fd[0], &key, &next_key) == 0) {
-			bpf_lookup_elem(map_fd[0], &next_key, &value);
+		while (bpf_map_get_next_key(map_fd[0], &key, &next_key) == 0) {
+			bpf_map_lookup_elem(map_fd[0], &next_key, &value);
 			assert(next_key == value);
 			sym = ksym_search(value);
 			printf(" %s", sym->name);
@@ -41,8 +43,8 @@ int main(int ac, char **argv)
 		if (key)
 			printf("\n");
 		key = 0;
-		while (bpf_get_next_key(map_fd[0], &key, &next_key) == 0)
-			bpf_delete_elem(map_fd[0], &next_key);
+		while (bpf_map_get_next_key(map_fd[0], &key, &next_key) == 0)
+			bpf_map_delete_elem(map_fd[0], &next_key);
 		sleep(1);
 	}
 
diff --git a/samples/bpf/tc_l2_redirect_user.c b/samples/bpf/tc_l2_redirect_user.c
index 4013c5337b91..28995a776560 100644
--- a/samples/bpf/tc_l2_redirect_user.c
+++ b/samples/bpf/tc_l2_redirect_user.c
@@ -60,9 +60,9 @@ int main(int argc, char **argv)
 	}
 
 	/* bpf_tunnel_key.remote_ipv4 expects host byte orders */
-	ret = bpf_update_elem(array_fd, &array_key, &ifindex, 0);
+	ret = bpf_map_update_elem(array_fd, &array_key, &ifindex, 0);
 	if (ret) {
-		perror("bpf_update_elem");
+		perror("bpf_map_update_elem");
 		goto out;
 	}
 
diff --git a/samples/bpf/test_cgrp2_array_pin.c b/samples/bpf/test_cgrp2_array_pin.c
index 70e86f7be69d..8a1b8b5d8def 100644
--- a/samples/bpf/test_cgrp2_array_pin.c
+++ b/samples/bpf/test_cgrp2_array_pin.c
@@ -85,9 +85,9 @@ int main(int argc, char **argv)
 		}
 	}
 
-	ret = bpf_update_elem(array_fd, &array_key, &cg2_fd, 0);
+	ret = bpf_map_update_elem(array_fd, &array_key, &cg2_fd, 0);
 	if (ret) {
-		perror("bpf_update_elem");
+		perror("bpf_map_update_elem");
 		goto out;
 	}
 
diff --git a/samples/bpf/test_current_task_under_cgroup_user.c b/samples/bpf/test_current_task_under_cgroup_user.c
index 30b0bce884f9..054915324aeb 100644
--- a/samples/bpf/test_current_task_under_cgroup_user.c
+++ b/samples/bpf/test_current_task_under_cgroup_user.c
@@ -28,6 +28,8 @@
 #define log_err(MSG, ...) fprintf(stderr, "(%s:%d: errno: %s) " MSG "\n", \
 	__FILE__, __LINE__, clean_errno(), ##__VA_ARGS__)
 
+char bpf_log_buf[BPF_LOG_BUF_SIZE];
+
 static int join_cgroup(char *path)
 {
 	int fd, rc = 0;
@@ -94,7 +96,7 @@ int main(int argc, char **argv)
 		goto cleanup_cgroup_err;
 	}
 
-	if (bpf_update_elem(map_fd[0], &idx, &cg2, BPF_ANY)) {
+	if (bpf_map_update_elem(map_fd[0], &idx, &cg2, BPF_ANY)) {
 		log_err("Adding target cgroup to map");
 		goto cleanup_cgroup_err;
 	}
@@ -109,7 +111,7 @@ int main(int argc, char **argv)
 	 */
 
 	sync();
-	bpf_lookup_elem(map_fd[1], &idx, &remote_pid);
+	bpf_map_lookup_elem(map_fd[1], &idx, &remote_pid);
 
 	if (local_pid != remote_pid) {
 		fprintf(stderr,
@@ -123,10 +125,10 @@ int main(int argc, char **argv)
 		goto leave_cgroup_err;
 
 	remote_pid = 0;
-	bpf_update_elem(map_fd[1], &idx, &remote_pid, BPF_ANY);
+	bpf_map_update_elem(map_fd[1], &idx, &remote_pid, BPF_ANY);
 
 	sync();
-	bpf_lookup_elem(map_fd[1], &idx, &remote_pid);
+	bpf_map_lookup_elem(map_fd[1], &idx, &remote_pid);
 
 	if (local_pid == remote_pid) {
 		fprintf(stderr, "BPF cgroup negative test did not work\n");
diff --git a/samples/bpf/test_maps.c b/samples/bpf/test_maps.c
index cce2b59751eb..2618394a3cc7 100644
--- a/samples/bpf/test_maps.c
+++ b/samples/bpf/test_maps.c
@@ -36,68 +36,68 @@ static void test_hashmap_sanity(int i, void *data)
 	key = 1;
 	value = 1234;
 	/* insert key=1 element */
-	assert(bpf_update_elem(map_fd, &key, &value, BPF_ANY) == 0);
+	assert(bpf_map_update_elem(map_fd, &key, &value, BPF_ANY) == 0);
 
 	value = 0;
 	/* BPF_NOEXIST means: add new element if it doesn't exist */
-	assert(bpf_update_elem(map_fd, &key, &value, BPF_NOEXIST) == -1 &&
+	assert(bpf_map_update_elem(map_fd, &key, &value, BPF_NOEXIST) == -1 &&
 	       /* key=1 already exists */
 	       errno == EEXIST);
 
-	assert(bpf_update_elem(map_fd, &key, &value, -1) == -1 && errno == EINVAL);
+	assert(bpf_map_update_elem(map_fd, &key, &value, -1) == -1 && errno == EINVAL);
 
 	/* check that key=1 can be found */
-	assert(bpf_lookup_elem(map_fd, &key, &value) == 0 && value == 1234);
+	assert(bpf_map_lookup_elem(map_fd, &key, &value) == 0 && value == 1234);
 
 	key = 2;
 	/* check that key=2 is not found */
-	assert(bpf_lookup_elem(map_fd, &key, &value) == -1 && errno == ENOENT);
+	assert(bpf_map_lookup_elem(map_fd, &key, &value) == -1 && errno == ENOENT);
 
 	/* BPF_EXIST means: update existing element */
-	assert(bpf_update_elem(map_fd, &key, &value, BPF_EXIST) == -1 &&
+	assert(bpf_map_update_elem(map_fd, &key, &value, BPF_EXIST) == -1 &&
 	       /* key=2 is not there */
 	       errno == ENOENT);
 
 	/* insert key=2 element */
-	assert(bpf_update_elem(map_fd, &key, &value, BPF_NOEXIST) == 0);
+	assert(bpf_map_update_elem(map_fd, &key, &value, BPF_NOEXIST) == 0);
 
 	/* key=1 and key=2 were inserted, check that key=0 cannot be inserted
 	 * due to max_entries limit
 	 */
 	key = 0;
-	assert(bpf_update_elem(map_fd, &key, &value, BPF_NOEXIST) == -1 &&
+	assert(bpf_map_update_elem(map_fd, &key, &value, BPF_NOEXIST) == -1 &&
 	       errno == E2BIG);
 
 	/* update existing element, thought the map is full */
 	key = 1;
-	assert(bpf_update_elem(map_fd, &key, &value, BPF_EXIST) == 0);
+	assert(bpf_map_update_elem(map_fd, &key, &value, BPF_EXIST) == 0);
 	key = 2;
-	assert(bpf_update_elem(map_fd, &key, &value, BPF_ANY) == 0);
+	assert(bpf_map_update_elem(map_fd, &key, &value, BPF_ANY) == 0);
 	key = 1;
-	assert(bpf_update_elem(map_fd, &key, &value, BPF_ANY) == 0);
+	assert(bpf_map_update_elem(map_fd, &key, &value, BPF_ANY) == 0);
 
 	/* check that key = 0 doesn't exist */
 	key = 0;
-	assert(bpf_delete_elem(map_fd, &key) == -1 && errno == ENOENT);
+	assert(bpf_map_delete_elem(map_fd, &key) == -1 && errno == ENOENT);
 
 	/* iterate over two elements */
-	assert(bpf_get_next_key(map_fd, &key, &next_key) == 0 &&
+	assert(bpf_map_get_next_key(map_fd, &key, &next_key) == 0 &&
 	       (next_key == 1 || next_key == 2));
-	assert(bpf_get_next_key(map_fd, &next_key, &next_key) == 0 &&
+	assert(bpf_map_get_next_key(map_fd, &next_key, &next_key) == 0 &&
 	       (next_key == 1 || next_key == 2));
-	assert(bpf_get_next_key(map_fd, &next_key, &next_key) == -1 &&
+	assert(bpf_map_get_next_key(map_fd, &next_key, &next_key) == -1 &&
 	       errno == ENOENT);
 
 	/* delete both elements */
 	key = 1;
-	assert(bpf_delete_elem(map_fd, &key) == 0);
+	assert(bpf_map_delete_elem(map_fd, &key) == 0);
 	key = 2;
-	assert(bpf_delete_elem(map_fd, &key) == 0);
-	assert(bpf_delete_elem(map_fd, &key) == -1 && errno == ENOENT);
+	assert(bpf_map_delete_elem(map_fd, &key) == 0);
+	assert(bpf_map_delete_elem(map_fd, &key) == -1 && errno == ENOENT);
 
 	key = 0;
 	/* check that map is empty */
-	assert(bpf_get_next_key(map_fd, &key, &next_key) == -1 &&
+	assert(bpf_map_get_next_key(map_fd, &key, &next_key) == -1 &&
 	       errno == ENOENT);
 	close(map_fd);
 }
@@ -123,54 +123,54 @@ static void test_percpu_hashmap_sanity(int task, void *data)
 	key = 1;
 	/* insert key=1 element */
 	assert(!(expected_key_mask & key));
-	assert(bpf_update_elem(map_fd, &key, value, BPF_ANY) == 0);
+	assert(bpf_map_update_elem(map_fd, &key, value, BPF_ANY) == 0);
 	expected_key_mask |= key;
 
 	/* BPF_NOEXIST means: add new element if it doesn't exist */
-	assert(bpf_update_elem(map_fd, &key, value, BPF_NOEXIST) == -1 &&
+	assert(bpf_map_update_elem(map_fd, &key, value, BPF_NOEXIST) == -1 &&
 	       /* key=1 already exists */
 	       errno == EEXIST);
 
 	/* -1 is an invalid flag */
-	assert(bpf_update_elem(map_fd, &key, value, -1) == -1 &&
+	assert(bpf_map_update_elem(map_fd, &key, value, -1) == -1 &&
 	       errno == EINVAL);
 
 	/* check that key=1 can be found. value could be 0 if the lookup
 	 * was run from a different cpu.
 	 */
 	value[0] = 1;
-	assert(bpf_lookup_elem(map_fd, &key, value) == 0 && value[0] == 100);
+	assert(bpf_map_lookup_elem(map_fd, &key, value) == 0 && value[0] == 100);
 
 	key = 2;
 	/* check that key=2 is not found */
-	assert(bpf_lookup_elem(map_fd, &key, value) == -1 && errno == ENOENT);
+	assert(bpf_map_lookup_elem(map_fd, &key, value) == -1 && errno == ENOENT);
 
 	/* BPF_EXIST means: update existing element */
-	assert(bpf_update_elem(map_fd, &key, value, BPF_EXIST) == -1 &&
+	assert(bpf_map_update_elem(map_fd, &key, value, BPF_EXIST) == -1 &&
 	       /* key=2 is not there */
 	       errno == ENOENT);
 
 	/* insert key=2 element */
 	assert(!(expected_key_mask & key));
-	assert(bpf_update_elem(map_fd, &key, value, BPF_NOEXIST) == 0);
+	assert(bpf_map_update_elem(map_fd, &key, value, BPF_NOEXIST) == 0);
 	expected_key_mask |= key;
 
 	/* key=1 and key=2 were inserted, check that key=0 cannot be inserted
 	 * due to max_entries limit
 	 */
 	key = 0;
-	assert(bpf_update_elem(map_fd, &key, value, BPF_NOEXIST) == -1 &&
+	assert(bpf_map_update_elem(map_fd, &key, value, BPF_NOEXIST) == -1 &&
 	       errno == E2BIG);
 
 	/* check that key = 0 doesn't exist */
-	assert(bpf_delete_elem(map_fd, &key) == -1 && errno == ENOENT);
+	assert(bpf_map_delete_elem(map_fd, &key) == -1 && errno == ENOENT);
 
 	/* iterate over two elements */
-	while (!bpf_get_next_key(map_fd, &key, &next_key)) {
+	while (!bpf_map_get_next_key(map_fd, &key, &next_key)) {
 		assert((expected_key_mask & next_key) == next_key);
 		expected_key_mask &= ~next_key;
 
-		assert(bpf_lookup_elem(map_fd, &next_key, value) == 0);
+		assert(bpf_map_lookup_elem(map_fd, &next_key, value) == 0);
 		for (i = 0; i < nr_cpus; i++)
 			assert(value[i] == i + 100);
 
@@ -180,18 +180,18 @@ static void test_percpu_hashmap_sanity(int task, void *data)
 
 	/* Update with BPF_EXIST */
 	key = 1;
-	assert(bpf_update_elem(map_fd, &key, value, BPF_EXIST) == 0);
+	assert(bpf_map_update_elem(map_fd, &key, value, BPF_EXIST) == 0);
 
 	/* delete both elements */
 	key = 1;
-	assert(bpf_delete_elem(map_fd, &key) == 0);
+	assert(bpf_map_delete_elem(map_fd, &key) == 0);
 	key = 2;
-	assert(bpf_delete_elem(map_fd, &key) == 0);
-	assert(bpf_delete_elem(map_fd, &key) == -1 && errno == ENOENT);
+	assert(bpf_map_delete_elem(map_fd, &key) == 0);
+	assert(bpf_map_delete_elem(map_fd, &key) == -1 && errno == ENOENT);
 
 	key = 0;
 	/* check that map is empty */
-	assert(bpf_get_next_key(map_fd, &key, &next_key) == -1 &&
+	assert(bpf_map_get_next_key(map_fd, &key, &next_key) == -1 &&
 	       errno == ENOENT);
 	close(map_fd);
 }
@@ -211,41 +211,41 @@ static void test_arraymap_sanity(int i, void *data)
 	key = 1;
 	value = 1234;
 	/* insert key=1 element */
-	assert(bpf_update_elem(map_fd, &key, &value, BPF_ANY) == 0);
+	assert(bpf_map_update_elem(map_fd, &key, &value, BPF_ANY) == 0);
 
 	value = 0;
-	assert(bpf_update_elem(map_fd, &key, &value, BPF_NOEXIST) == -1 &&
+	assert(bpf_map_update_elem(map_fd, &key, &value, BPF_NOEXIST) == -1 &&
 	       errno == EEXIST);
 
 	/* check that key=1 can be found */
-	assert(bpf_lookup_elem(map_fd, &key, &value) == 0 && value == 1234);
+	assert(bpf_map_lookup_elem(map_fd, &key, &value) == 0 && value == 1234);
 
 	key = 0;
 	/* check that key=0 is also found and zero initialized */
-	assert(bpf_lookup_elem(map_fd, &key, &value) == 0 && value == 0);
+	assert(bpf_map_lookup_elem(map_fd, &key, &value) == 0 && value == 0);
 
 
 	/* key=0 and key=1 were inserted, check that key=2 cannot be inserted
 	 * due to max_entries limit
 	 */
 	key = 2;
-	assert(bpf_update_elem(map_fd, &key, &value, BPF_EXIST) == -1 &&
+	assert(bpf_map_update_elem(map_fd, &key, &value, BPF_EXIST) == -1 &&
 	       errno == E2BIG);
 
 	/* check that key = 2 doesn't exist */
-	assert(bpf_lookup_elem(map_fd, &key, &value) == -1 && errno == ENOENT);
+	assert(bpf_map_lookup_elem(map_fd, &key, &value) == -1 && errno == ENOENT);
 
 	/* iterate over two elements */
-	assert(bpf_get_next_key(map_fd, &key, &next_key) == 0 &&
+	assert(bpf_map_get_next_key(map_fd, &key, &next_key) == 0 &&
 	       next_key == 0);
-	assert(bpf_get_next_key(map_fd, &next_key, &next_key) == 0 &&
+	assert(bpf_map_get_next_key(map_fd, &next_key, &next_key) == 0 &&
 	       next_key == 1);
-	assert(bpf_get_next_key(map_fd, &next_key, &next_key) == -1 &&
+	assert(bpf_map_get_next_key(map_fd, &next_key, &next_key) == -1 &&
 	       errno == ENOENT);
 
 	/* delete shouldn't succeed */
 	key = 1;
-	assert(bpf_delete_elem(map_fd, &key) == -1 && errno == EINVAL);
+	assert(bpf_map_delete_elem(map_fd, &key) == -1 && errno == EINVAL);
 
 	close(map_fd);
 }
@@ -269,12 +269,12 @@ static void test_percpu_arraymap_many_keys(void)
 		values[i] = i + 10;
 
 	for (key = 0; key < nr_keys; key++)
-		assert(bpf_update_elem(map_fd, &key, values, BPF_ANY) == 0);
+		assert(bpf_map_update_elem(map_fd, &key, values, BPF_ANY) == 0);
 
 	for (key = 0; key < nr_keys; key++) {
 		for (i = 0; i < nr_cpus; i++)
 			values[i] = 0;
-		assert(bpf_lookup_elem(map_fd, &key, values) == 0);
+		assert(bpf_map_lookup_elem(map_fd, &key, values) == 0);
 		for (i = 0; i < nr_cpus; i++)
 			assert(values[i] == i + 10);
 	}
@@ -300,40 +300,40 @@ static void test_percpu_arraymap_sanity(int i, void *data)
 
 	key = 1;
 	/* insert key=1 element */
-	assert(bpf_update_elem(map_fd, &key, values, BPF_ANY) == 0);
+	assert(bpf_map_update_elem(map_fd, &key, values, BPF_ANY) == 0);
 
 	values[0] = 0;
-	assert(bpf_update_elem(map_fd, &key, values, BPF_NOEXIST) == -1 &&
+	assert(bpf_map_update_elem(map_fd, &key, values, BPF_NOEXIST) == -1 &&
 	       errno == EEXIST);
 
 	/* check that key=1 can be found */
-	assert(bpf_lookup_elem(map_fd, &key, values) == 0 && values[0] == 100);
+	assert(bpf_map_lookup_elem(map_fd, &key, values) == 0 && values[0] == 100);
 
 	key = 0;
 	/* check that key=0 is also found and zero initialized */
-	assert(bpf_lookup_elem(map_fd, &key, values) == 0 &&
+	assert(bpf_map_lookup_elem(map_fd, &key, values) == 0 &&
 	       values[0] == 0 && values[nr_cpus - 1] == 0);
 
 
 	/* check that key=2 cannot be inserted due to max_entries limit */
 	key = 2;
-	assert(bpf_update_elem(map_fd, &key, values, BPF_EXIST) == -1 &&
+	assert(bpf_map_update_elem(map_fd, &key, values, BPF_EXIST) == -1 &&
 	       errno == E2BIG);
 
 	/* check that key = 2 doesn't exist */
-	assert(bpf_lookup_elem(map_fd, &key, values) == -1 && errno == ENOENT);
+	assert(bpf_map_lookup_elem(map_fd, &key, values) == -1 && errno == ENOENT);
 
 	/* iterate over two elements */
-	assert(bpf_get_next_key(map_fd, &key, &next_key) == 0 &&
+	assert(bpf_map_get_next_key(map_fd, &key, &next_key) == 0 &&
 	       next_key == 0);
-	assert(bpf_get_next_key(map_fd, &next_key, &next_key) == 0 &&
+	assert(bpf_map_get_next_key(map_fd, &next_key, &next_key) == 0 &&
 	       next_key == 1);
-	assert(bpf_get_next_key(map_fd, &next_key, &next_key) == -1 &&
+	assert(bpf_map_get_next_key(map_fd, &next_key, &next_key) == -1 &&
 	       errno == ENOENT);
 
 	/* delete shouldn't succeed */
 	key = 1;
-	assert(bpf_delete_elem(map_fd, &key) == -1 && errno == EINVAL);
+	assert(bpf_map_delete_elem(map_fd, &key) == -1 && errno == EINVAL);
 
 	close(map_fd);
 }
@@ -359,21 +359,21 @@ static void test_map_large(void)
 	for (i = 0; i < MAP_SIZE; i++) {
 		key = (struct bigkey) {.c = i};
 		value = i;
-		assert(bpf_update_elem(map_fd, &key, &value, BPF_NOEXIST) == 0);
+		assert(bpf_map_update_elem(map_fd, &key, &value, BPF_NOEXIST) == 0);
 	}
 	key.c = -1;
-	assert(bpf_update_elem(map_fd, &key, &value, BPF_NOEXIST) == -1 &&
+	assert(bpf_map_update_elem(map_fd, &key, &value, BPF_NOEXIST) == -1 &&
 	       errno == E2BIG);
 
 	/* iterate through all elements */
 	for (i = 0; i < MAP_SIZE; i++)
-		assert(bpf_get_next_key(map_fd, &key, &key) == 0);
-	assert(bpf_get_next_key(map_fd, &key, &key) == -1 && errno == ENOENT);
+		assert(bpf_map_get_next_key(map_fd, &key, &key) == 0);
+	assert(bpf_map_get_next_key(map_fd, &key, &key) == -1 && errno == ENOENT);
 
 	key.c = 0;
-	assert(bpf_lookup_elem(map_fd, &key, &value) == 0 && value == 0);
+	assert(bpf_map_lookup_elem(map_fd, &key, &value) == 0 && value == 0);
 	key.a = 1;
-	assert(bpf_lookup_elem(map_fd, &key, &value) == -1 && errno == ENOENT);
+	assert(bpf_map_lookup_elem(map_fd, &key, &value) == -1 && errno == ENOENT);
 
 	close(map_fd);
 }
@@ -423,10 +423,10 @@ static void do_work(int fn, void *data)
 	for (i = fn; i < MAP_SIZE; i += TASKS) {
 		key = value = i;
 		if (do_update) {
-			assert(bpf_update_elem(map_fd, &key, &value, BPF_NOEXIST) == 0);
-			assert(bpf_update_elem(map_fd, &key, &value, BPF_EXIST) == 0);
+			assert(bpf_map_update_elem(map_fd, &key, &value, BPF_NOEXIST) == 0);
+			assert(bpf_map_update_elem(map_fd, &key, &value, BPF_EXIST) == 0);
 		} else {
-			assert(bpf_delete_elem(map_fd, &key) == 0);
+			assert(bpf_map_delete_elem(map_fd, &key) == 0);
 		}
 	}
 }
@@ -454,19 +454,19 @@ static void test_map_parallel(void)
 	run_parallel(TASKS, do_work, data);
 
 	/* check that key=0 is already there */
-	assert(bpf_update_elem(map_fd, &key, &value, BPF_NOEXIST) == -1 &&
+	assert(bpf_map_update_elem(map_fd, &key, &value, BPF_NOEXIST) == -1 &&
 	       errno == EEXIST);
 
 	/* check that all elements were inserted */
 	key = -1;
 	for (i = 0; i < MAP_SIZE; i++)
-		assert(bpf_get_next_key(map_fd, &key, &key) == 0);
-	assert(bpf_get_next_key(map_fd, &key, &key) == -1 && errno == ENOENT);
+		assert(bpf_map_get_next_key(map_fd, &key, &key) == 0);
+	assert(bpf_map_get_next_key(map_fd, &key, &key) == -1 && errno == ENOENT);
 
 	/* another check for all elements */
 	for (i = 0; i < MAP_SIZE; i++) {
 		key = MAP_SIZE - i - 1;
-		assert(bpf_lookup_elem(map_fd, &key, &value) == 0 &&
+		assert(bpf_map_lookup_elem(map_fd, &key, &value) == 0 &&
 		       value == key);
 	}
 
@@ -476,7 +476,7 @@ static void test_map_parallel(void)
 
 	/* nothing should be left */
 	key = -1;
-	assert(bpf_get_next_key(map_fd, &key, &key) == -1 && errno == ENOENT);
+	assert(bpf_map_get_next_key(map_fd, &key, &key) == -1 && errno == ENOENT);
 }
 
 static void run_all_tests(void)
diff --git a/samples/bpf/test_overhead_user.c b/samples/bpf/test_overhead_user.c
index d291167fd3c7..74b79af98ba2 100644
--- a/samples/bpf/test_overhead_user.c
+++ b/samples/bpf/test_overhead_user.c
@@ -24,6 +24,8 @@
 
 #define MAX_CNT 1000000
 
+char bpf_log_buf[BPF_LOG_BUF_SIZE];
+
 static __u64 time_get_ns(void)
 {
 	struct timespec ts;
diff --git a/samples/bpf/test_probe_write_user_user.c b/samples/bpf/test_probe_write_user_user.c
index a44bf347bedd..29af2160e4e2 100644
--- a/samples/bpf/test_probe_write_user_user.c
+++ b/samples/bpf/test_probe_write_user_user.c
@@ -9,6 +9,8 @@
 #include <netinet/in.h>
 #include <arpa/inet.h>
 
+char bpf_log_buf[BPF_LOG_BUF_SIZE];
+
 int main(int ac, char **argv)
 {
 	int serverfd, serverconnfd, clientfd;
@@ -50,7 +52,7 @@ int main(int ac, char **argv)
 	mapped_addr_in->sin_port = htons(5555);
 	mapped_addr_in->sin_addr.s_addr = inet_addr("255.255.255.255");
 
-	assert(!bpf_update_elem(map_fd[0], &mapped_addr, &serv_addr, BPF_ANY));
+	assert(!bpf_map_update_elem(map_fd[0], &mapped_addr, &serv_addr, BPF_ANY));
 
 	assert(listen(serverfd, 5) == 0);
 
diff --git a/samples/bpf/test_verifier.c b/samples/bpf/test_verifier.c
index 369ffaad3799..2e85a8e2d696 100644
--- a/samples/bpf/test_verifier.c
+++ b/samples/bpf/test_verifier.c
@@ -24,6 +24,8 @@
 
 #define MAX_FIXUPS 8
 
+char bpf_log_buf[BPF_LOG_BUF_SIZE];
+
 struct bpf_test {
 	const char *descr;
 	struct bpf_insn	insns[MAX_INSNS];
@@ -2466,9 +2468,9 @@ static int test(void)
 
 		printf("#%d %s ", i, tests[i].descr);
 
-		prog_fd = bpf_prog_load(prog_type ?: BPF_PROG_TYPE_SOCKET_FILTER,
-					prog, prog_len * sizeof(struct bpf_insn),
-					"GPL", 0);
+		prog_fd = bpf_load_program(prog_type ?: BPF_PROG_TYPE_SOCKET_FILTER,
+					   prog, prog_len * sizeof(struct bpf_insn),
+					   "GPL", 0, NULL, 0);
 
 		if (unpriv && tests[i].result_unpriv != UNDEF)
 			expected_result = tests[i].result_unpriv;
diff --git a/samples/bpf/trace_event_user.c b/samples/bpf/trace_event_user.c
index 9a130d31ecf2..de8fd0266d78 100644
--- a/samples/bpf/trace_event_user.c
+++ b/samples/bpf/trace_event_user.c
@@ -24,6 +24,7 @@
 #define SAMPLE_FREQ 50
 
 static bool sys_read_seen, sys_write_seen;
+char bpf_log_buf[BPF_LOG_BUF_SIZE];
 
 static void print_ksym(__u64 addr)
 {
@@ -61,14 +62,14 @@ static void print_stack(struct key_t *key, __u64 count)
 	int i;
 
 	printf("%3lld %s;", count, key->comm);
-	if (bpf_lookup_elem(map_fd[1], &key->kernstack, ip) != 0) {
+	if (bpf_map_lookup_elem(map_fd[1], &key->kernstack, ip) != 0) {
 		printf("---;");
 	} else {
 		for (i = PERF_MAX_STACK_DEPTH - 1; i >= 0; i--)
 			print_ksym(ip[i]);
 	}
 	printf("-;");
-	if (bpf_lookup_elem(map_fd[1], &key->userstack, ip) != 0) {
+	if (bpf_map_lookup_elem(map_fd[1], &key->userstack, ip) != 0) {
 		printf("---;");
 	} else {
 		for (i = PERF_MAX_STACK_DEPTH - 1; i >= 0; i--)
@@ -98,10 +99,10 @@ static void print_stacks(void)
 	int fd = map_fd[0], stack_map = map_fd[1];
 
 	sys_read_seen = sys_write_seen = false;
-	while (bpf_get_next_key(fd, &key, &next_key) == 0) {
-		bpf_lookup_elem(fd, &next_key, &value);
+	while (bpf_map_get_next_key(fd, &key, &next_key) == 0) {
+		bpf_map_lookup_elem(fd, &next_key, &value);
 		print_stack(&next_key, value);
-		bpf_delete_elem(fd, &next_key);
+		bpf_map_delete_elem(fd, &next_key);
 		key = next_key;
 	}
 
@@ -111,8 +112,8 @@ static void print_stacks(void)
 	}
 
 	/* clear stack map */
-	while (bpf_get_next_key(stack_map, &stackid, &next_id) == 0) {
-		bpf_delete_elem(stack_map, &next_id);
+	while (bpf_map_get_next_key(stack_map, &stackid, &next_id) == 0) {
+		bpf_map_delete_elem(stack_map, &next_id);
 		stackid = next_id;
 	}
 }
diff --git a/samples/bpf/trace_output_user.c b/samples/bpf/trace_output_user.c
index 661a7d052f2c..9c38f7aa4515 100644
--- a/samples/bpf/trace_output_user.c
+++ b/samples/bpf/trace_output_user.c
@@ -27,6 +27,7 @@ static int pmu_fd;
 int page_size;
 int page_cnt = 8;
 volatile struct perf_event_mmap_page *header;
+char bpf_log_buf[BPF_LOG_BUF_SIZE];
 
 typedef void (*print_fn)(void *data, int size);
 
@@ -162,7 +163,7 @@ static void test_bpf_perf_event(void)
 	pmu_fd = perf_event_open(&attr, -1/*pid*/, 0/*cpu*/, -1/*group_fd*/, 0);
 
 	assert(pmu_fd >= 0);
-	assert(bpf_update_elem(map_fd[0], &key, &pmu_fd, BPF_ANY) == 0);
+	assert(bpf_map_update_elem(map_fd[0], &key, &pmu_fd, BPF_ANY) == 0);
 	ioctl(pmu_fd, PERF_EVENT_IOC_ENABLE, 0);
 }
 
diff --git a/samples/bpf/tracex1_user.c b/samples/bpf/tracex1_user.c
index 31a48183beea..aa60cc3ef38c 100644
--- a/samples/bpf/tracex1_user.c
+++ b/samples/bpf/tracex1_user.c
@@ -4,6 +4,8 @@
 #include "libbpf.h"
 #include "bpf_load.h"
 
+char bpf_log_buf[BPF_LOG_BUF_SIZE];
+
 int main(int ac, char **argv)
 {
 	FILE *f;
diff --git a/samples/bpf/tracex2_user.c b/samples/bpf/tracex2_user.c
index ab5b19e68acf..5dd128cc5785 100644
--- a/samples/bpf/tracex2_user.c
+++ b/samples/bpf/tracex2_user.c
@@ -10,6 +10,8 @@
 #define MAX_INDEX	64
 #define MAX_STARS	38
 
+char bpf_log_buf[BPF_LOG_BUF_SIZE];
+
 static void stars(char *str, long val, long max, int width)
 {
 	int i;
@@ -46,12 +48,12 @@ static void print_hist_for_pid(int fd, void *task)
 	long max_value = 0;
 	int i, ind;
 
-	while (bpf_get_next_key(fd, &key, &next_key) == 0) {
+	while (bpf_map_get_next_key(fd, &key, &next_key) == 0) {
 		if (memcmp(&next_key, task, SIZE)) {
 			key = next_key;
 			continue;
 		}
-		bpf_lookup_elem(fd, &next_key, values);
+		bpf_map_lookup_elem(fd, &next_key, values);
 		value = 0;
 		for (i = 0; i < nr_cpus; i++)
 			value += values[i];
@@ -81,7 +83,7 @@ static void print_hist(int fd)
 	int task_cnt = 0;
 	int i;
 
-	while (bpf_get_next_key(fd, &key, &next_key) == 0) {
+	while (bpf_map_get_next_key(fd, &key, &next_key) == 0) {
 		int found = 0;
 
 		for (i = 0; i < task_cnt; i++)
@@ -134,8 +136,8 @@ int main(int ac, char **argv)
 
 	for (i = 0; i < 5; i++) {
 		key = 0;
-		while (bpf_get_next_key(map_fd[0], &key, &next_key) == 0) {
-			bpf_lookup_elem(map_fd[0], &next_key, &value);
+		while (bpf_map_get_next_key(map_fd[0], &key, &next_key) == 0) {
+			bpf_map_lookup_elem(map_fd[0], &next_key, &value);
 			printf("location 0x%lx count %ld\n", next_key, value);
 			key = next_key;
 		}
diff --git a/samples/bpf/tracex3_user.c b/samples/bpf/tracex3_user.c
index 48716f7f0d8b..9c6ee595a882 100644
--- a/samples/bpf/tracex3_user.c
+++ b/samples/bpf/tracex3_user.c
@@ -18,6 +18,8 @@
 
 #define SLOTS 100
 
+char bpf_log_buf[BPF_LOG_BUF_SIZE];
+
 static void clear_stats(int fd)
 {
 	unsigned int nr_cpus = sysconf(_SC_NPROCESSORS_CONF);
@@ -26,7 +28,7 @@ static void clear_stats(int fd)
 
 	memset(values, 0, sizeof(values));
 	for (key = 0; key < SLOTS; key++)
-		bpf_update_elem(fd, &key, values, BPF_ANY);
+		bpf_map_update_elem(fd, &key, values, BPF_ANY);
 }
 
 const char *color[] = {
@@ -87,7 +89,7 @@ static void print_hist(int fd)
 	int i;
 
 	for (key = 0; key < SLOTS; key++) {
-		bpf_lookup_elem(fd, &key, values);
+		bpf_map_lookup_elem(fd, &key, values);
 		value = 0;
 		for (i = 0; i < nr_cpus; i++)
 			value += values[i];
diff --git a/samples/bpf/tracex4_user.c b/samples/bpf/tracex4_user.c
index bc4a3bdea6ed..8b2f98c6c99a 100644
--- a/samples/bpf/tracex4_user.c
+++ b/samples/bpf/tracex4_user.c
@@ -15,6 +15,8 @@
 #include "libbpf.h"
 #include "bpf_load.h"
 
+char bpf_log_buf[BPF_LOG_BUF_SIZE];
+
 struct pair {
 	long long val;
 	__u64 ip;
@@ -37,8 +39,8 @@ static void print_old_objects(int fd)
 	key = write(1, "\e[1;1H\e[2J", 12); /* clear screen */
 
 	key = -1;
-	while (bpf_get_next_key(map_fd[0], &key, &next_key) == 0) {
-		bpf_lookup_elem(map_fd[0], &next_key, &v);
+	while (bpf_map_get_next_key(map_fd[0], &key, &next_key) == 0) {
+		bpf_map_lookup_elem(map_fd[0], &next_key, &v);
 		key = next_key;
 		if (val - v.val < 1000000000ll)
 			/* object was allocated more then 1 sec ago */
diff --git a/samples/bpf/tracex5_user.c b/samples/bpf/tracex5_user.c
index 36b5925bb137..035beea6b31c 100644
--- a/samples/bpf/tracex5_user.c
+++ b/samples/bpf/tracex5_user.c
@@ -8,6 +8,8 @@
 #include "bpf_load.h"
 #include <sys/resource.h>
 
+char bpf_log_buf[BPF_LOG_BUF_SIZE];
+
 /* install fake seccomp program to enable seccomp code path inside the kernel,
  * so that our kprobe attached to seccomp_phase1() can be triggered
  */
diff --git a/samples/bpf/tracex6_user.c b/samples/bpf/tracex6_user.c
index 8ea4976cfcf1..7a3b4a4b19f3 100644
--- a/samples/bpf/tracex6_user.c
+++ b/samples/bpf/tracex6_user.c
@@ -13,6 +13,8 @@
 
 #define SAMPLE_PERIOD  0x7fffffffffffffffULL
 
+char bpf_log_buf[BPF_LOG_BUF_SIZE];
+
 static void test_bpf_perf_event(void)
 {
 	int nr_cpus = sysconf(_SC_NPROCESSORS_CONF);
@@ -36,7 +38,7 @@ static void test_bpf_perf_event(void)
 			goto exit;
 		}
 
-		bpf_update_elem(map_fd[0], &i, &pmu_fd[i], BPF_ANY);
+		bpf_map_update_elem(map_fd[0], &i, &pmu_fd[i], BPF_ANY);
 		ioctl(pmu_fd[i], PERF_EVENT_IOC_ENABLE, 0);
 	}
 
diff --git a/samples/bpf/xdp1_user.c b/samples/bpf/xdp1_user.c
index a5e109e398a1..7302322f26ff 100644
--- a/samples/bpf/xdp1_user.c
+++ b/samples/bpf/xdp1_user.c
@@ -18,6 +18,8 @@
 #include "bpf_load.h"
 #include "libbpf.h"
 
+char bpf_log_buf[BPF_LOG_BUF_SIZE];
+
 static int set_link_xdp_fd(int ifindex, int fd)
 {
 	struct sockaddr_nl sa;
@@ -134,7 +136,7 @@ static void poll_stats(int interval)
 		for (key = 0; key < nr_keys; key++) {
 			__u64 sum = 0;
 
-			assert(bpf_lookup_elem(map_fd[0], &key, values) == 0);
+			assert(bpf_map_lookup_elem(map_fd[0], &key, values) == 0);
 			for (i = 0; i < nr_cpus; i++)
 				sum += (values[i] - prev[key][i]);
 			if (sum)
-- 
2.9.3

^ permalink raw reply related	[flat|nested] 23+ messages in thread

* [PATCH 12/22] samples/bpf: Switch over to libbpf
  2016-12-13 15:09 [GIT PULL 00/22] perf/core improvements and fixes Arnaldo Carvalho de Melo
                   ` (10 preceding siblings ...)
  2016-12-13 15:09 ` [PATCH 11/22] samples/bpf: Make samples more libbpf-centric Arnaldo Carvalho de Melo
@ 2016-12-13 15:09 ` Arnaldo Carvalho de Melo
  2016-12-13 15:09 ` [PATCH 13/22] samples/bpf: Remove perf_event_open() declaration Arnaldo Carvalho de Melo
                   ` (9 subsequent siblings)
  21 siblings, 0 replies; 23+ messages in thread
From: Arnaldo Carvalho de Melo @ 2016-12-13 15:09 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: linux-kernel, Joe Stringer, Alexei Starovoitov, Daniel Borkmann,
	Wang Nan, Arnaldo Carvalho de Melo

From: Joe Stringer <joe@ovn.org>

Now that libbpf under tools/lib/bpf/* is synced with the version from
samples/bpf, we can get rid most of the libbpf library here.

Signed-off-by: Joe Stringer <joe@ovn.org>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/20161209024620.31660-6-joe@ovn.org
[ Use -I$(srctree)/tools/lib/ to support out of source code tree builds, as noticed by Wang Nan ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 samples/bpf/Makefile   |  60 +++++++++++++-------------
 samples/bpf/README.rst |   4 +-
 samples/bpf/libbpf.c   | 111 -------------------------------------------------
 samples/bpf/libbpf.h   |  19 +--------
 tools/lib/bpf/Makefile |   2 +
 5 files changed, 38 insertions(+), 158 deletions(-)

diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 72c58675973e..7307b2bf43be 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -29,35 +29,38 @@ hostprogs-y += trace_event
 hostprogs-y += sampleip
 hostprogs-y += tc_l2_redirect
 
-test_verifier-objs := test_verifier.o libbpf.o
-test_maps-objs := test_maps.o libbpf.o
-sock_example-objs := sock_example.o libbpf.o
-fds_example-objs := bpf_load.o libbpf.o fds_example.o
-sockex1-objs := bpf_load.o libbpf.o sockex1_user.o
-sockex2-objs := bpf_load.o libbpf.o sockex2_user.o
-sockex3-objs := bpf_load.o libbpf.o sockex3_user.o
-tracex1-objs := bpf_load.o libbpf.o tracex1_user.o
-tracex2-objs := bpf_load.o libbpf.o tracex2_user.o
-tracex3-objs := bpf_load.o libbpf.o tracex3_user.o
-tracex4-objs := bpf_load.o libbpf.o tracex4_user.o
-tracex5-objs := bpf_load.o libbpf.o tracex5_user.o
-tracex6-objs := bpf_load.o libbpf.o tracex6_user.o
-test_probe_write_user-objs := bpf_load.o libbpf.o test_probe_write_user_user.o
-trace_output-objs := bpf_load.o libbpf.o trace_output_user.o
-lathist-objs := bpf_load.o libbpf.o lathist_user.o
-offwaketime-objs := bpf_load.o libbpf.o offwaketime_user.o
-spintest-objs := bpf_load.o libbpf.o spintest_user.o
-map_perf_test-objs := bpf_load.o libbpf.o map_perf_test_user.o
-test_overhead-objs := bpf_load.o libbpf.o test_overhead_user.o
-test_cgrp2_array_pin-objs := libbpf.o test_cgrp2_array_pin.o
-xdp1-objs := bpf_load.o libbpf.o xdp1_user.o
+# Libbpf dependencies
+LIBBPF := libbpf.o ../../tools/lib/bpf/bpf.o
+
+test_verifier-objs := test_verifier.o $(LIBBPF)
+test_maps-objs := test_maps.o $(LIBBPF)
+sock_example-objs := sock_example.o $(LIBBPF)
+fds_example-objs := bpf_load.o $(LIBBPF) fds_example.o
+sockex1-objs := bpf_load.o $(LIBBPF) sockex1_user.o
+sockex2-objs := bpf_load.o $(LIBBPF) sockex2_user.o
+sockex3-objs := bpf_load.o $(LIBBPF) sockex3_user.o
+tracex1-objs := bpf_load.o $(LIBBPF) tracex1_user.o
+tracex2-objs := bpf_load.o $(LIBBPF) tracex2_user.o
+tracex3-objs := bpf_load.o $(LIBBPF) tracex3_user.o
+tracex4-objs := bpf_load.o $(LIBBPF) tracex4_user.o
+tracex5-objs := bpf_load.o $(LIBBPF) tracex5_user.o
+tracex6-objs := bpf_load.o $(LIBBPF) tracex6_user.o
+test_probe_write_user-objs := bpf_load.o $(LIBBPF) test_probe_write_user_user.o
+trace_output-objs := bpf_load.o $(LIBBPF) trace_output_user.o
+lathist-objs := bpf_load.o $(LIBBPF) lathist_user.o
+offwaketime-objs := bpf_load.o $(LIBBPF) offwaketime_user.o
+spintest-objs := bpf_load.o $(LIBBPF) spintest_user.o
+map_perf_test-objs := bpf_load.o $(LIBBPF) map_perf_test_user.o
+test_overhead-objs := bpf_load.o $(LIBBPF) test_overhead_user.o
+test_cgrp2_array_pin-objs := $(LIBBPF) test_cgrp2_array_pin.o
+xdp1-objs := bpf_load.o $(LIBBPF) xdp1_user.o
 # reuse xdp1 source intentionally
-xdp2-objs := bpf_load.o libbpf.o xdp1_user.o
-test_current_task_under_cgroup-objs := bpf_load.o libbpf.o \
+xdp2-objs := bpf_load.o $(LIBBPF) xdp1_user.o
+test_current_task_under_cgroup-objs := bpf_load.o $(LIBBPF) \
 				       test_current_task_under_cgroup_user.o
-trace_event-objs := bpf_load.o libbpf.o trace_event_user.o
-sampleip-objs := bpf_load.o libbpf.o sampleip_user.o
-tc_l2_redirect-objs := bpf_load.o libbpf.o tc_l2_redirect_user.o
+trace_event-objs := bpf_load.o $(LIBBPF) trace_event_user.o
+sampleip-objs := bpf_load.o $(LIBBPF) sampleip_user.o
+tc_l2_redirect-objs := bpf_load.o $(LIBBPF) tc_l2_redirect_user.o
 
 # Tell kbuild to always build the programs
 always := $(hostprogs-y)
@@ -89,7 +92,7 @@ always += test_current_task_under_cgroup_kern.o
 always += trace_event_kern.o
 always += sampleip_kern.o
 
-HOSTCFLAGS += -I$(objtree)/usr/include
+HOSTCFLAGS += -I$(objtree)/usr/include -I$(srctree)/tools/lib/
 
 HOSTCFLAGS_bpf_load.o += -I$(objtree)/usr/include -Wno-unused-variable
 HOSTLOADLIBES_fds_example += -lelf
@@ -123,6 +126,7 @@ CLANG ?= clang
 
 # Trick to allow make to be run from this directory
 all:
+	$(MAKE) -C ../../ tools/lib/bpf/
 	$(MAKE) -C ../../ $$PWD/
 
 clean:
diff --git a/samples/bpf/README.rst b/samples/bpf/README.rst
index a43eae3f0551..79f9a58f1872 100644
--- a/samples/bpf/README.rst
+++ b/samples/bpf/README.rst
@@ -1,8 +1,8 @@
 eBPF sample programs
 ====================
 
-This directory contains a mini eBPF library, test stubs, verifier
-test-suite and examples for using eBPF.
+This directory contains a test stubs, verifier test-suite and examples
+for using eBPF. The examples use libbpf from tools/lib/bpf.
 
 Build dependencies
 ==================
diff --git a/samples/bpf/libbpf.c b/samples/bpf/libbpf.c
index e5c5a69996fc..d9af876b4a2c 100644
--- a/samples/bpf/libbpf.c
+++ b/samples/bpf/libbpf.c
@@ -4,8 +4,6 @@
 #include <linux/unistd.h>
 #include <unistd.h>
 #include <string.h>
-#include <linux/netlink.h>
-#include <linux/bpf.h>
 #include <errno.h>
 #include <net/ethernet.h>
 #include <net/if.h>
@@ -13,115 +11,6 @@
 #include <arpa/inet.h>
 #include "libbpf.h"
 
-static __u64 ptr_to_u64(void *ptr)
-{
-	return (__u64) (unsigned long) ptr;
-}
-
-int bpf_create_map(enum bpf_map_type map_type, int key_size, int value_size,
-		   int max_entries, int map_flags)
-{
-	union bpf_attr attr = {
-		.map_type = map_type,
-		.key_size = key_size,
-		.value_size = value_size,
-		.max_entries = max_entries,
-		.map_flags = map_flags,
-	};
-
-	return syscall(__NR_bpf, BPF_MAP_CREATE, &attr, sizeof(attr));
-}
-
-int bpf_map_update_elem(int fd, void *key, void *value, unsigned long long flags)
-{
-	union bpf_attr attr = {
-		.map_fd = fd,
-		.key = ptr_to_u64(key),
-		.value = ptr_to_u64(value),
-		.flags = flags,
-	};
-
-	return syscall(__NR_bpf, BPF_MAP_UPDATE_ELEM, &attr, sizeof(attr));
-}
-
-int bpf_map_lookup_elem(int fd, void *key, void *value)
-{
-	union bpf_attr attr = {
-		.map_fd = fd,
-		.key = ptr_to_u64(key),
-		.value = ptr_to_u64(value),
-	};
-
-	return syscall(__NR_bpf, BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr));
-}
-
-int bpf_map_delete_elem(int fd, void *key)
-{
-	union bpf_attr attr = {
-		.map_fd = fd,
-		.key = ptr_to_u64(key),
-	};
-
-	return syscall(__NR_bpf, BPF_MAP_DELETE_ELEM, &attr, sizeof(attr));
-}
-
-int bpf_map_get_next_key(int fd, void *key, void *next_key)
-{
-	union bpf_attr attr = {
-		.map_fd = fd,
-		.key = ptr_to_u64(key),
-		.next_key = ptr_to_u64(next_key),
-	};
-
-	return syscall(__NR_bpf, BPF_MAP_GET_NEXT_KEY, &attr, sizeof(attr));
-}
-
-#define ROUND_UP(x, n) (((x) + (n) - 1u) & ~((n) - 1u))
-
-int bpf_load_program(enum bpf_prog_type prog_type,
-		     const struct bpf_insn *insns, int prog_len,
-		     const char *license, int kern_version,
-		     char *log_buf, size_t log_buf_sz)
-{
-	union bpf_attr attr = {
-		.prog_type = prog_type,
-		.insns = ptr_to_u64((void *) insns),
-		.insn_cnt = prog_len / sizeof(struct bpf_insn),
-		.license = ptr_to_u64((void *) license),
-		.log_buf = ptr_to_u64(log_buf),
-		.log_size = log_buf_sz,
-		.log_level = 1,
-	};
-
-	/* assign one field outside of struct init to make sure any
-	 * padding is zero initialized
-	 */
-	attr.kern_version = kern_version;
-
-	log_buf[0] = 0;
-
-	return syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
-}
-
-int bpf_obj_pin(int fd, const char *pathname)
-{
-	union bpf_attr attr = {
-		.pathname	= ptr_to_u64((void *)pathname),
-		.bpf_fd		= fd,
-	};
-
-	return syscall(__NR_bpf, BPF_OBJ_PIN, &attr, sizeof(attr));
-}
-
-int bpf_obj_get(const char *pathname)
-{
-	union bpf_attr attr = {
-		.pathname	= ptr_to_u64((void *)pathname),
-	};
-
-	return syscall(__NR_bpf, BPF_OBJ_GET, &attr, sizeof(attr));
-}
-
 int open_raw_sock(const char *name)
 {
 	struct sockaddr_ll sll;
diff --git a/samples/bpf/libbpf.h b/samples/bpf/libbpf.h
index 1325152be4cd..cc815624aacf 100644
--- a/samples/bpf/libbpf.h
+++ b/samples/bpf/libbpf.h
@@ -2,24 +2,9 @@
 #ifndef __LIBBPF_H
 #define __LIBBPF_H
 
-struct bpf_insn;
-
-int bpf_create_map(enum bpf_map_type map_type, int key_size, int value_size,
-		   int max_entries, int map_flags);
-int bpf_map_update_elem(int fd, void *key, void *value, unsigned long long flags);
-int bpf_map_lookup_elem(int fd, void *key, void *value);
-int bpf_map_delete_elem(int fd, void *key);
-int bpf_map_get_next_key(int fd, void *key, void *next_key);
-
-int bpf_load_program(enum bpf_prog_type prog_type,
-		     const struct bpf_insn *insns, int insn_len,
-		     const char *license, int kern_version,
-		     char *log_buf, size_t log_buf_sz);
+#include <bpf/bpf.h>
 
-int bpf_obj_pin(int fd, const char *pathname);
-int bpf_obj_get(const char *pathname);
-
-#define BPF_LOG_BUF_SIZE 65536
+struct bpf_insn;
 
 /* ALU ops on registers, bpf_add|sub|...: dst_reg += src_reg */
 
diff --git a/tools/lib/bpf/Makefile b/tools/lib/bpf/Makefile
index 62d89d50fcbd..616bd55f3be8 100644
--- a/tools/lib/bpf/Makefile
+++ b/tools/lib/bpf/Makefile
@@ -149,6 +149,8 @@ CMD_TARGETS = $(LIB_FILE)
 
 TARGETS = $(CMD_TARGETS)
 
+libbpf: all
+
 all: fixdep $(VERSION_FILES) all_cmd
 
 all_cmd: $(CMD_TARGETS)
-- 
2.9.3

^ permalink raw reply related	[flat|nested] 23+ messages in thread

* [PATCH 13/22] samples/bpf: Remove perf_event_open() declaration
  2016-12-13 15:09 [GIT PULL 00/22] perf/core improvements and fixes Arnaldo Carvalho de Melo
                   ` (11 preceding siblings ...)
  2016-12-13 15:09 ` [PATCH 12/22] samples/bpf: Switch over to libbpf Arnaldo Carvalho de Melo
@ 2016-12-13 15:09 ` Arnaldo Carvalho de Melo
  2016-12-13 15:09 ` [PATCH 14/22] samples/bpf: Move open_raw_sock to separate header Arnaldo Carvalho de Melo
                   ` (8 subsequent siblings)
  21 siblings, 0 replies; 23+ messages in thread
From: Arnaldo Carvalho de Melo @ 2016-12-13 15:09 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: linux-kernel, Joe Stringer, Alexei Starovoitov, Daniel Borkmann,
	Wang Nan, Arnaldo Carvalho de Melo

From: Joe Stringer <joe@ovn.org>

This declaration was made in samples/bpf/libbpf.c for convenience, but
there's already one in tools/perf/perf-sys.h. Reuse that one.

Committer notes:

Testing it:

  $ make -j4 O=../build/v4.9.0-rc8+ samples/bpf/
  make[1]: Entering directory '/home/build/v4.9.0-rc8+'
    CHK     include/config/kernel.release
    GEN     ./Makefile
    CHK     include/generated/uapi/linux/version.h
    Using /home/acme/git/linux as source for kernel
    CHK     include/generated/utsrelease.h
    CHK     include/generated/timeconst.h
    CHK     include/generated/bounds.h
    CHK     include/generated/asm-offsets.h
    CALL    /home/acme/git/linux/scripts/checksyscalls.sh
    HOSTCC  samples/bpf/test_verifier.o
    HOSTCC  samples/bpf/libbpf.o
    HOSTCC  samples/bpf/../../tools/lib/bpf/bpf.o
    HOSTCC  samples/bpf/test_maps.o
    HOSTCC  samples/bpf/sock_example.o
    HOSTCC  samples/bpf/bpf_load.o
<SNIP>
    HOSTLD  samples/bpf/trace_event
    HOSTLD  samples/bpf/sampleip
    HOSTLD  samples/bpf/tc_l2_redirect
  make[1]: Leaving directory '/home/build/v4.9.0-rc8+'
  $

Signed-off-by: Joe Stringer <joe@ovn.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/20161209024620.31660-7-joe@ovn.org
[ Use -I$(srctree)/tools/lib/ to support out of source code tree builds ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 samples/bpf/Makefile            | 3 ++-
 samples/bpf/bpf_load.c          | 3 ++-
 samples/bpf/libbpf.c            | 7 -------
 samples/bpf/libbpf.h            | 3 ---
 samples/bpf/sampleip_user.c     | 3 ++-
 samples/bpf/trace_event_user.c  | 9 +++++----
 samples/bpf/trace_output_user.c | 3 ++-
 samples/bpf/tracex6_user.c      | 3 ++-
 8 files changed, 15 insertions(+), 19 deletions(-)

diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 7307b2bf43be..0bcc3906361b 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -92,7 +92,8 @@ always += test_current_task_under_cgroup_kern.o
 always += trace_event_kern.o
 always += sampleip_kern.o
 
-HOSTCFLAGS += -I$(objtree)/usr/include -I$(srctree)/tools/lib/
+HOSTCFLAGS += -I$(objtree)/usr/include -I$(srctree)/tools/lib/ \
+	      -I$(srctree)/tools/include -I$(srctree)/tools/perf
 
 HOSTCFLAGS_bpf_load.o += -I$(objtree)/usr/include -Wno-unused-variable
 HOSTLOADLIBES_fds_example += -lelf
diff --git a/samples/bpf/bpf_load.c b/samples/bpf/bpf_load.c
index f8e3c58a0897..d683bd278171 100644
--- a/samples/bpf/bpf_load.c
+++ b/samples/bpf/bpf_load.c
@@ -19,6 +19,7 @@
 #include <ctype.h>
 #include "libbpf.h"
 #include "bpf_load.h"
+#include "perf-sys.h"
 
 #define DEBUGFS "/sys/kernel/debug/tracing/"
 
@@ -168,7 +169,7 @@ static int load_and_attach(const char *event, struct bpf_insn *prog, int size)
 	id = atoi(buf);
 	attr.config = id;
 
-	efd = perf_event_open(&attr, -1/*pid*/, 0/*cpu*/, -1/*group_fd*/, 0);
+	efd = sys_perf_event_open(&attr, -1/*pid*/, 0/*cpu*/, -1/*group_fd*/, 0);
 	if (efd < 0) {
 		printf("event %d fd %d err %s\n", id, efd, strerror(errno));
 		return -1;
diff --git a/samples/bpf/libbpf.c b/samples/bpf/libbpf.c
index d9af876b4a2c..bee473a494f1 100644
--- a/samples/bpf/libbpf.c
+++ b/samples/bpf/libbpf.c
@@ -34,10 +34,3 @@ int open_raw_sock(const char *name)
 
 	return sock;
 }
-
-int perf_event_open(struct perf_event_attr *attr, int pid, int cpu,
-		    int group_fd, unsigned long flags)
-{
-	return syscall(__NR_perf_event_open, attr, pid, cpu,
-		       group_fd, flags);
-}
diff --git a/samples/bpf/libbpf.h b/samples/bpf/libbpf.h
index cc815624aacf..09aedc320009 100644
--- a/samples/bpf/libbpf.h
+++ b/samples/bpf/libbpf.h
@@ -188,7 +188,4 @@ struct bpf_insn;
 /* create RAW socket and bind to interface 'name' */
 int open_raw_sock(const char *name);
 
-struct perf_event_attr;
-int perf_event_open(struct perf_event_attr *attr, int pid, int cpu,
-		    int group_fd, unsigned long flags);
 #endif
diff --git a/samples/bpf/sampleip_user.c b/samples/bpf/sampleip_user.c
index 09ab620b324c..476a11947180 100644
--- a/samples/bpf/sampleip_user.c
+++ b/samples/bpf/sampleip_user.c
@@ -21,6 +21,7 @@
 #include <sys/ioctl.h>
 #include "libbpf.h"
 #include "bpf_load.h"
+#include "perf-sys.h"
 
 #define DEFAULT_FREQ	99
 #define DEFAULT_SECS	5
@@ -50,7 +51,7 @@ static int sampling_start(int *pmu_fd, int freq)
 	};
 
 	for (i = 0; i < nr_cpus; i++) {
-		pmu_fd[i] = perf_event_open(&pe_sample_attr, -1 /* pid */, i,
+		pmu_fd[i] = sys_perf_event_open(&pe_sample_attr, -1 /* pid */, i,
 					    -1 /* group_fd */, 0 /* flags */);
 		if (pmu_fd[i] < 0) {
 			fprintf(stderr, "ERROR: Initializing perf sampling\n");
diff --git a/samples/bpf/trace_event_user.c b/samples/bpf/trace_event_user.c
index de8fd0266d78..ccb0cba8324a 100644
--- a/samples/bpf/trace_event_user.c
+++ b/samples/bpf/trace_event_user.c
@@ -20,6 +20,7 @@
 #include <sys/resource.h>
 #include "libbpf.h"
 #include "bpf_load.h"
+#include "perf-sys.h"
 
 #define SAMPLE_FREQ 50
 
@@ -126,9 +127,9 @@ static void test_perf_event_all_cpu(struct perf_event_attr *attr)
 
 	/* open perf_event on all cpus */
 	for (i = 0; i < nr_cpus; i++) {
-		pmu_fd[i] = perf_event_open(attr, -1, i, -1, 0);
+		pmu_fd[i] = sys_perf_event_open(attr, -1, i, -1, 0);
 		if (pmu_fd[i] < 0) {
-			printf("perf_event_open failed\n");
+			printf("sys_perf_event_open failed\n");
 			goto all_cpu_err;
 		}
 		assert(ioctl(pmu_fd[i], PERF_EVENT_IOC_SET_BPF, prog_fd[0]) == 0);
@@ -147,9 +148,9 @@ static void test_perf_event_task(struct perf_event_attr *attr)
 	int pmu_fd;
 
 	/* open task bound event */
-	pmu_fd = perf_event_open(attr, 0, -1, -1, 0);
+	pmu_fd = sys_perf_event_open(attr, 0, -1, -1, 0);
 	if (pmu_fd < 0) {
-		printf("perf_event_open failed\n");
+		printf("sys_perf_event_open failed\n");
 		return;
 	}
 	assert(ioctl(pmu_fd, PERF_EVENT_IOC_SET_BPF, prog_fd[0]) == 0);
diff --git a/samples/bpf/trace_output_user.c b/samples/bpf/trace_output_user.c
index 9c38f7aa4515..64e692fd7d51 100644
--- a/samples/bpf/trace_output_user.c
+++ b/samples/bpf/trace_output_user.c
@@ -21,6 +21,7 @@
 #include <signal.h>
 #include "libbpf.h"
 #include "bpf_load.h"
+#include "perf-sys.h"
 
 static int pmu_fd;
 
@@ -160,7 +161,7 @@ static void test_bpf_perf_event(void)
 	};
 	int key = 0;
 
-	pmu_fd = perf_event_open(&attr, -1/*pid*/, 0/*cpu*/, -1/*group_fd*/, 0);
+	pmu_fd = sys_perf_event_open(&attr, -1/*pid*/, 0/*cpu*/, -1/*group_fd*/, 0);
 
 	assert(pmu_fd >= 0);
 	assert(bpf_map_update_elem(map_fd[0], &key, &pmu_fd, BPF_ANY) == 0);
diff --git a/samples/bpf/tracex6_user.c b/samples/bpf/tracex6_user.c
index 7a3b4a4b19f3..1681cb7cd713 100644
--- a/samples/bpf/tracex6_user.c
+++ b/samples/bpf/tracex6_user.c
@@ -10,6 +10,7 @@
 #include <linux/bpf.h>
 #include "libbpf.h"
 #include "bpf_load.h"
+#include "perf-sys.h"
 
 #define SAMPLE_PERIOD  0x7fffffffffffffffULL
 
@@ -32,7 +33,7 @@ static void test_bpf_perf_event(void)
 	};
 
 	for (i = 0; i < nr_cpus; i++) {
-		pmu_fd[i] = perf_event_open(&attr_insn_pmu, -1/*pid*/, i/*cpu*/, -1/*group_fd*/, 0);
+		pmu_fd[i] = sys_perf_event_open(&attr_insn_pmu, -1/*pid*/, i/*cpu*/, -1/*group_fd*/, 0);
 		if (pmu_fd[i] < 0) {
 			printf("event syscall failed\n");
 			goto exit;
-- 
2.9.3

^ permalink raw reply related	[flat|nested] 23+ messages in thread

* [PATCH 14/22] samples/bpf: Move open_raw_sock to separate header
  2016-12-13 15:09 [GIT PULL 00/22] perf/core improvements and fixes Arnaldo Carvalho de Melo
                   ` (12 preceding siblings ...)
  2016-12-13 15:09 ` [PATCH 13/22] samples/bpf: Remove perf_event_open() declaration Arnaldo Carvalho de Melo
@ 2016-12-13 15:09 ` Arnaldo Carvalho de Melo
  2016-12-13 15:09 ` [PATCH 15/22] perf sdt: Add scanning of sdt probles arguments Arnaldo Carvalho de Melo
                   ` (7 subsequent siblings)
  21 siblings, 0 replies; 23+ messages in thread
From: Arnaldo Carvalho de Melo @ 2016-12-13 15:09 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: linux-kernel, Joe Stringer, Alexei Starovoitov, Daniel Borkmann,
	Wang Nan, Arnaldo Carvalho de Melo

From: Joe Stringer <joe@ovn.org>

This function was declared in libbpf.c and was the only remaining
function in this library, but has nothing to do with BPF. Shift it out
into a new header, sock_example.h, and include it from the relevant
samples.

Signed-off-by: Joe Stringer <joe@ovn.org>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/20161209024620.31660-8-joe@ovn.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 samples/bpf/Makefile                     | 2 +-
 samples/bpf/fds_example.c                | 1 +
 samples/bpf/libbpf.h                     | 3 ---
 samples/bpf/sock_example.c               | 1 +
 samples/bpf/{libbpf.c => sock_example.h} | 3 +--
 samples/bpf/sockex1_user.c               | 1 +
 samples/bpf/sockex2_user.c               | 1 +
 samples/bpf/sockex3_user.c               | 1 +
 8 files changed, 7 insertions(+), 6 deletions(-)
 rename samples/bpf/{libbpf.c => sock_example.h} (92%)

diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 0bcc3906361b..9ffa6a2c061d 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -30,7 +30,7 @@ hostprogs-y += sampleip
 hostprogs-y += tc_l2_redirect
 
 # Libbpf dependencies
-LIBBPF := libbpf.o ../../tools/lib/bpf/bpf.o
+LIBBPF := ../../tools/lib/bpf/bpf.o
 
 test_verifier-objs := test_verifier.o $(LIBBPF)
 test_maps-objs := test_maps.o $(LIBBPF)
diff --git a/samples/bpf/fds_example.c b/samples/bpf/fds_example.c
index 4ffd8f340496..7ae3b19f5c42 100644
--- a/samples/bpf/fds_example.c
+++ b/samples/bpf/fds_example.c
@@ -14,6 +14,7 @@
 
 #include "bpf_load.h"
 #include "libbpf.h"
+#include "sock_example.h"
 
 #define BPF_F_PIN	(1 << 0)
 #define BPF_F_GET	(1 << 1)
diff --git a/samples/bpf/libbpf.h b/samples/bpf/libbpf.h
index 09aedc320009..3705fba453a0 100644
--- a/samples/bpf/libbpf.h
+++ b/samples/bpf/libbpf.h
@@ -185,7 +185,4 @@ struct bpf_insn;
 		.off   = 0,					\
 		.imm   = 0 })
 
-/* create RAW socket and bind to interface 'name' */
-int open_raw_sock(const char *name);
-
 #endif
diff --git a/samples/bpf/sock_example.c b/samples/bpf/sock_example.c
index 7ab636c30154..bb418fd0a1f2 100644
--- a/samples/bpf/sock_example.c
+++ b/samples/bpf/sock_example.c
@@ -27,6 +27,7 @@
 #include <linux/ip.h>
 #include <stddef.h>
 #include "libbpf.h"
+#include "sock_example.h"
 
 static int test_sock(void)
 {
diff --git a/samples/bpf/libbpf.c b/samples/bpf/sock_example.h
similarity index 92%
rename from samples/bpf/libbpf.c
rename to samples/bpf/sock_example.h
index bee473a494f1..09f7fe7e5fd7 100644
--- a/samples/bpf/libbpf.c
+++ b/samples/bpf/sock_example.h
@@ -1,4 +1,3 @@
-/* eBPF mini library */
 #include <stdlib.h>
 #include <stdio.h>
 #include <linux/unistd.h>
@@ -11,7 +10,7 @@
 #include <arpa/inet.h>
 #include "libbpf.h"
 
-int open_raw_sock(const char *name)
+static inline int open_raw_sock(const char *name)
 {
 	struct sockaddr_ll sll;
 	int sock;
diff --git a/samples/bpf/sockex1_user.c b/samples/bpf/sockex1_user.c
index 2956d893d732..5cdddc5c9015 100644
--- a/samples/bpf/sockex1_user.c
+++ b/samples/bpf/sockex1_user.c
@@ -3,6 +3,7 @@
 #include <linux/bpf.h>
 #include "libbpf.h"
 #include "bpf_load.h"
+#include "sock_example.h"
 #include <unistd.h>
 #include <arpa/inet.h>
 
diff --git a/samples/bpf/sockex2_user.c b/samples/bpf/sockex2_user.c
index c43958a67cca..7ae4e2e5cf3a 100644
--- a/samples/bpf/sockex2_user.c
+++ b/samples/bpf/sockex2_user.c
@@ -3,6 +3,7 @@
 #include <linux/bpf.h>
 #include "libbpf.h"
 #include "bpf_load.h"
+#include "sock_example.h"
 #include <unistd.h>
 #include <arpa/inet.h>
 #include <sys/resource.h>
diff --git a/samples/bpf/sockex3_user.c b/samples/bpf/sockex3_user.c
index 2cb9011ea440..a100cf6c95bb 100644
--- a/samples/bpf/sockex3_user.c
+++ b/samples/bpf/sockex3_user.c
@@ -3,6 +3,7 @@
 #include <linux/bpf.h>
 #include "libbpf.h"
 #include "bpf_load.h"
+#include "sock_example.h"
 #include <unistd.h>
 #include <arpa/inet.h>
 #include <sys/resource.h>
-- 
2.9.3

^ permalink raw reply related	[flat|nested] 23+ messages in thread

* [PATCH 15/22] perf sdt: Add scanning of sdt probles arguments
  2016-12-13 15:09 [GIT PULL 00/22] perf/core improvements and fixes Arnaldo Carvalho de Melo
                   ` (13 preceding siblings ...)
  2016-12-13 15:09 ` [PATCH 14/22] samples/bpf: Move open_raw_sock to separate header Arnaldo Carvalho de Melo
@ 2016-12-13 15:09 ` Arnaldo Carvalho de Melo
  2016-12-13 15:09 ` [PATCH 16/22] perf tools: Remove some needless __maybe_unused Arnaldo Carvalho de Melo
                   ` (6 subsequent siblings)
  21 siblings, 0 replies; 23+ messages in thread
From: Arnaldo Carvalho de Melo @ 2016-12-13 15:09 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: linux-kernel, Alexis Berlemont, Alexander Shishkin, Hemant Kumar,
	Peter Zijlstra, Arnaldo Carvalho de Melo

From: Alexis Berlemont <alexis.berlemont@gmail.com>

During a "perf buildid-cache --add" command, the section ".note.stapsdt"
of the "added" binary is scanned in order to list the available SDT
markers available in a binary. The parts containing the probes arguments
were left unscanned.

The whole section is now parsed; the probe arguments are extracted for
later use.

Signed-off-by: Alexis Berlemont <alexis.berlemont@gmail.com>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Hemant Kumar <hemant@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20161126005803.25693-2-alexis.berlemont@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/symbol-elf.c | 25 +++++++++++++++++++++++--
 tools/perf/util/symbol.h     |  1 +
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c
index 99400b0e8f2a..7725c3f9d6a2 100644
--- a/tools/perf/util/symbol-elf.c
+++ b/tools/perf/util/symbol-elf.c
@@ -1822,7 +1822,7 @@ void kcore_extract__delete(struct kcore_extract *kce)
 static int populate_sdt_note(Elf **elf, const char *data, size_t len,
 			     struct list_head *sdt_notes)
 {
-	const char *provider, *name;
+	const char *provider, *name, *args;
 	struct sdt_note *tmp = NULL;
 	GElf_Ehdr ehdr;
 	GElf_Addr base_off = 0;
@@ -1881,6 +1881,25 @@ static int populate_sdt_note(Elf **elf, const char *data, size_t len,
 		goto out_free_prov;
 	}
 
+	args = memchr(name, '\0', data + len - name);
+
+	/*
+	 * There is no argument if:
+	 * - We reached the end of the note;
+	 * - There is not enough room to hold a potential string;
+	 * - The argument string is empty or just contains ':'.
+	 */
+	if (args == NULL || data + len - args < 2 ||
+		args[1] == ':' || args[1] == '\0')
+		tmp->args = NULL;
+	else {
+		tmp->args = strdup(++args);
+		if (!tmp->args) {
+			ret = -ENOMEM;
+			goto out_free_name;
+		}
+	}
+
 	if (gelf_getclass(*elf) == ELFCLASS32) {
 		memcpy(&tmp->addr, &buf, 3 * sizeof(Elf32_Addr));
 		tmp->bit32 = true;
@@ -1892,7 +1911,7 @@ static int populate_sdt_note(Elf **elf, const char *data, size_t len,
 	if (!gelf_getehdr(*elf, &ehdr)) {
 		pr_debug("%s : cannot get elf header.\n", __func__);
 		ret = -EBADF;
-		goto out_free_name;
+		goto out_free_args;
 	}
 
 	/* Adjust the prelink effect :
@@ -1917,6 +1936,8 @@ static int populate_sdt_note(Elf **elf, const char *data, size_t len,
 	list_add_tail(&tmp->note_list, sdt_notes);
 	return 0;
 
+out_free_args:
+	free(tmp->args);
 out_free_name:
 	free(tmp->name);
 out_free_prov:
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 6c358b7ed336..9222c7e702f3 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -351,6 +351,7 @@ int arch__choose_best_symbol(struct symbol *syma, struct symbol *symb);
 struct sdt_note {
 	char *name;			/* name of the note*/
 	char *provider;			/* provider name */
+	char *args;
 	bool bit32;			/* whether the location is 32 bits? */
 	union {				/* location, base and semaphore addrs */
 		Elf64_Addr a64[3];
-- 
2.9.3

^ permalink raw reply related	[flat|nested] 23+ messages in thread

* [PATCH 16/22] perf tools: Remove some needless __maybe_unused
  2016-12-13 15:09 [GIT PULL 00/22] perf/core improvements and fixes Arnaldo Carvalho de Melo
                   ` (14 preceding siblings ...)
  2016-12-13 15:09 ` [PATCH 15/22] perf sdt: Add scanning of sdt probles arguments Arnaldo Carvalho de Melo
@ 2016-12-13 15:09 ` Arnaldo Carvalho de Melo
  2016-12-13 15:09 ` [PATCH 17/22] perf mem: Fix --all-user/--all-kernel options Arnaldo Carvalho de Melo
                   ` (5 subsequent siblings)
  21 siblings, 0 replies; 23+ messages in thread
From: Arnaldo Carvalho de Melo @ 2016-12-13 15:09 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: linux-kernel, Arnaldo Carvalho de Melo, Adrian Hunter,
	David Ahern, Jiri Olsa, Namhyung Kim, Wang Nan

From: Arnaldo Carvalho de Melo <acme@redhat.com>

I.e. those parameters/functions _are_ used, so ditch that misleading attribute.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-13cqtjh0yojg5gzvpq1zzpl0@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/builtin-c2c.c    | 13 ++++++-------
 tools/perf/builtin-report.c |  2 +-
 tools/perf/builtin-stat.c   |  6 +++---
 3 files changed, 10 insertions(+), 11 deletions(-)

diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index 4b419631753d..f8ca7a4ebabc 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -208,7 +208,7 @@ static void compute_stats(struct c2c_hist_entry *c2c_he,
 static int process_sample_event(struct perf_tool *tool __maybe_unused,
 				union perf_event *event,
 				struct perf_sample *sample,
-				struct perf_evsel *evsel __maybe_unused,
+				struct perf_evsel *evsel,
 				struct machine *machine)
 {
 	struct c2c_hists *c2c_hists = &c2c.hists;
@@ -379,7 +379,7 @@ static int symbol_width(struct hists *hists, struct sort_entry *se)
 
 static int c2c_width(struct perf_hpp_fmt *fmt,
 		     struct perf_hpp *hpp __maybe_unused,
-		     struct hists *hists __maybe_unused)
+		     struct hists *hists)
 {
 	struct c2c_fmt *c2c_fmt;
 	struct c2c_dimension *dim;
@@ -1127,7 +1127,7 @@ MEAN_ENTRY(mean_lcl_entry,  lcl_hitm);
 MEAN_ENTRY(mean_load_entry, load);
 
 static int
-cpucnt_entry(struct perf_hpp_fmt *fmt __maybe_unused, struct perf_hpp *hpp,
+cpucnt_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
 	     struct hist_entry *he)
 {
 	struct c2c_hist_entry *c2c_he;
@@ -1141,7 +1141,7 @@ cpucnt_entry(struct perf_hpp_fmt *fmt __maybe_unused, struct perf_hpp *hpp,
 }
 
 static int
-cl_idx_entry(struct perf_hpp_fmt *fmt __maybe_unused, struct perf_hpp *hpp,
+cl_idx_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
 	     struct hist_entry *he)
 {
 	struct c2c_hist_entry *c2c_he;
@@ -1155,7 +1155,7 @@ cl_idx_entry(struct perf_hpp_fmt *fmt __maybe_unused, struct perf_hpp *hpp,
 }
 
 static int
-cl_idx_empty_entry(struct perf_hpp_fmt *fmt __maybe_unused, struct perf_hpp *hpp,
+cl_idx_empty_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
 		   struct hist_entry *he)
 {
 	int width = c2c_width(fmt, hpp, he->hists);
@@ -1779,7 +1779,6 @@ static int c2c_hists__init(struct c2c_hists *hists,
 	return hpp_list__parse(&hists->list, NULL, sort);
 }
 
-__maybe_unused
 static int c2c_hists__reinit(struct c2c_hists *c2c_hists,
 			     const char *output,
 			     const char *sort)
@@ -2658,7 +2657,7 @@ static int perf_c2c__report(int argc, const char **argv)
 	return err;
 }
 
-static int parse_record_events(const struct option *opt __maybe_unused,
+static int parse_record_events(const struct option *opt,
 			       const char *str, int unset __maybe_unused)
 {
 	bool *event_set = (bool *) opt->value;
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index d2afbe4a240d..06cc759a4597 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -648,7 +648,7 @@ report_parse_ignore_callees_opt(const struct option *opt __maybe_unused,
 }
 
 static int
-parse_branch_mode(const struct option *opt __maybe_unused,
+parse_branch_mode(const struct option *opt,
 		  const char *str __maybe_unused, int unset)
 {
 	int *branch_mode = opt->value;
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 688dea7cb08f..a02f2e965628 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -2195,7 +2195,7 @@ static int process_stat_round_event(struct perf_tool *tool __maybe_unused,
 }
 
 static
-int process_stat_config_event(struct perf_tool *tool __maybe_unused,
+int process_stat_config_event(struct perf_tool *tool,
 			      union perf_event *event,
 			      struct perf_session *session __maybe_unused)
 {
@@ -2238,7 +2238,7 @@ static int set_maps(struct perf_stat *st)
 }
 
 static
-int process_thread_map_event(struct perf_tool *tool __maybe_unused,
+int process_thread_map_event(struct perf_tool *tool,
 			     union perf_event *event,
 			     struct perf_session *session __maybe_unused)
 {
@@ -2257,7 +2257,7 @@ int process_thread_map_event(struct perf_tool *tool __maybe_unused,
 }
 
 static
-int process_cpu_map_event(struct perf_tool *tool __maybe_unused,
+int process_cpu_map_event(struct perf_tool *tool,
 			  union perf_event *event,
 			  struct perf_session *session __maybe_unused)
 {
-- 
2.9.3

^ permalink raw reply related	[flat|nested] 23+ messages in thread

* [PATCH 17/22] perf mem: Fix --all-user/--all-kernel options
  2016-12-13 15:09 [GIT PULL 00/22] perf/core improvements and fixes Arnaldo Carvalho de Melo
                   ` (15 preceding siblings ...)
  2016-12-13 15:09 ` [PATCH 16/22] perf tools: Remove some needless __maybe_unused Arnaldo Carvalho de Melo
@ 2016-12-13 15:09 ` Arnaldo Carvalho de Melo
  2016-12-13 15:09 ` [PATCH 18/22] perf evsel: Use variable instead of repeating lengthy FD macro Arnaldo Carvalho de Melo
                   ` (4 subsequent siblings)
  21 siblings, 0 replies; 23+ messages in thread
From: Arnaldo Carvalho de Melo @ 2016-12-13 15:09 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: linux-kernel, Jiri Olsa, David Ahern, Namhyung Kim,
	Peter Zijlstra, Arnaldo Carvalho de Melo

From: Jiri Olsa <jolsa@kernel.org>

Removing extra '--' prefix.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Fixes: ad16511b0e40 ("perf mem: Add -U/-K (--all-user/--all-kernel) options")
Link: http://lkml.kernel.org/r/1481538943-21874-2-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/builtin-mem.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/builtin-mem.c b/tools/perf/builtin-mem.c
index d1ce29be560e..cd7bc4d104e2 100644
--- a/tools/perf/builtin-mem.c
+++ b/tools/perf/builtin-mem.c
@@ -70,8 +70,8 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem)
 	OPT_UINTEGER(0, "ldlat", &perf_mem_events__loads_ldlat, "mem-loads latency"),
 	OPT_INCR('v', "verbose", &verbose,
 		 "be more verbose (show counter open errors, etc)"),
-	OPT_BOOLEAN('U', "--all-user", &all_user, "collect only user level data"),
-	OPT_BOOLEAN('K', "--all-kernel", &all_kernel, "collect only kernel level data"),
+	OPT_BOOLEAN('U', "all-user", &all_user, "collect only user level data"),
+	OPT_BOOLEAN('K', "all-kernel", &all_kernel, "collect only kernel level data"),
 	OPT_END()
 	};
 
-- 
2.9.3

^ permalink raw reply related	[flat|nested] 23+ messages in thread

* [PATCH 18/22] perf evsel: Use variable instead of repeating lengthy FD macro
  2016-12-13 15:09 [GIT PULL 00/22] perf/core improvements and fixes Arnaldo Carvalho de Melo
                   ` (16 preceding siblings ...)
  2016-12-13 15:09 ` [PATCH 17/22] perf mem: Fix --all-user/--all-kernel options Arnaldo Carvalho de Melo
@ 2016-12-13 15:09 ` Arnaldo Carvalho de Melo
  2016-12-13 15:09 ` [PATCH 19/22] perf thread_map: Add thread_map__remove function Arnaldo Carvalho de Melo
                   ` (3 subsequent siblings)
  21 siblings, 0 replies; 23+ messages in thread
From: Arnaldo Carvalho de Melo @ 2016-12-13 15:09 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: linux-kernel, Jiri Olsa, David Ahern, Namhyung Kim,
	Peter Zijlstra, Arnaldo Carvalho de Melo

From: Jiri Olsa <jolsa@kernel.org>

It's more readable and will ease up following patches.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1481538943-21874-3-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/evsel.c | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index b2365a63db45..fd61ebd77c26 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -1474,7 +1474,7 @@ static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
 	for (cpu = 0; cpu < cpus->nr; cpu++) {
 
 		for (thread = 0; thread < nthreads; thread++) {
-			int group_fd;
+			int fd, group_fd;
 
 			if (!evsel->cgrp && !evsel->system_wide)
 				pid = thread_map__pid(threads, thread);
@@ -1484,21 +1484,22 @@ static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
 			pr_debug2("sys_perf_event_open: pid %d  cpu %d  group_fd %d  flags %#lx",
 				  pid, cpus->map[cpu], group_fd, flags);
 
-			FD(evsel, cpu, thread) = sys_perf_event_open(&evsel->attr,
-								     pid,
-								     cpus->map[cpu],
-								     group_fd, flags);
-			if (FD(evsel, cpu, thread) < 0) {
+			fd = sys_perf_event_open(&evsel->attr, pid, cpus->map[cpu],
+						 group_fd, flags);
+
+			FD(evsel, cpu, thread) = fd;
+
+			if (fd < 0) {
 				err = -errno;
 				pr_debug2("\nsys_perf_event_open failed, error %d\n",
 					  err);
 				goto try_fallback;
 			}
 
-			pr_debug2(" = %d\n", FD(evsel, cpu, thread));
+			pr_debug2(" = %d\n", fd);
 
 			if (evsel->bpf_fd >= 0) {
-				int evt_fd = FD(evsel, cpu, thread);
+				int evt_fd = fd;
 				int bpf_fd = evsel->bpf_fd;
 
 				err = ioctl(evt_fd,
-- 
2.9.3

^ permalink raw reply related	[flat|nested] 23+ messages in thread

* [PATCH 19/22] perf thread_map: Add thread_map__remove function
  2016-12-13 15:09 [GIT PULL 00/22] perf/core improvements and fixes Arnaldo Carvalho de Melo
                   ` (17 preceding siblings ...)
  2016-12-13 15:09 ` [PATCH 18/22] perf evsel: Use variable instead of repeating lengthy FD macro Arnaldo Carvalho de Melo
@ 2016-12-13 15:09 ` Arnaldo Carvalho de Melo
  2016-12-13 15:09 ` [PATCH 20/22] perf evsel: Allow to ignore missing pid Arnaldo Carvalho de Melo
                   ` (2 subsequent siblings)
  21 siblings, 0 replies; 23+ messages in thread
From: Arnaldo Carvalho de Melo @ 2016-12-13 15:09 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: linux-kernel, Jiri Olsa, David Ahern, Namhyung Kim,
	Peter Zijlstra, Arnaldo Carvalho de Melo

From: Jiri Olsa <jolsa@kernel.org>

Add thread_map__remove function to remove thread from thread map.

Add automated test also.

Committer notes:

Testing it:

  # perf test "Remove thread map"
  39: Remove thread map                          : Ok
  # perf test -v "Remove thread map"
  39: Remove thread map                          :
  --- start ---
  test child forked, pid 4483
  2 threads: 4482, 4483
  1 thread: 4483
  0 thread:
  test child finished with 0
  ---- end ----
  Remove thread map: Ok
  #

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1481538943-21874-4-git-send-email-jolsa@kernel.org
[ Added stdlib.h, to get the free() declaration ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/tests/builtin-test.c |  4 ++++
 tools/perf/tests/tests.h        |  1 +
 tools/perf/tests/thread-map.c   | 44 +++++++++++++++++++++++++++++++++++++++++
 tools/perf/util/thread_map.c    | 22 +++++++++++++++++++++
 tools/perf/util/thread_map.h    |  1 +
 5 files changed, 72 insertions(+)

diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 23605202d4a1..a77dcc0d24e3 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -186,6 +186,10 @@ static struct test generic_tests[] = {
 		.func = test__thread_map_synthesize,
 	},
 	{
+		.desc = "Remove thread map",
+		.func = test__thread_map_remove,
+	},
+	{
 		.desc = "Synthesize cpu map",
 		.func = test__cpu_map_synthesize,
 	},
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index 0d7b251305af..a512f0c8ff5b 100644
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -80,6 +80,7 @@ const char *test__bpf_subtest_get_desc(int subtest);
 int test__bpf_subtest_get_nr(void);
 int test_session_topology(int subtest);
 int test__thread_map_synthesize(int subtest);
+int test__thread_map_remove(int subtest);
 int test__cpu_map_synthesize(int subtest);
 int test__synthesize_stat_config(int subtest);
 int test__synthesize_stat(int subtest);
diff --git a/tools/perf/tests/thread-map.c b/tools/perf/tests/thread-map.c
index cee2a2cdc933..a4a4b4625ac3 100644
--- a/tools/perf/tests/thread-map.c
+++ b/tools/perf/tests/thread-map.c
@@ -1,3 +1,4 @@
+#include <stdlib.h>
 #include <sys/types.h>
 #include <unistd.h>
 #include <sys/prctl.h>
@@ -93,3 +94,46 @@ int test__thread_map_synthesize(int subtest __maybe_unused)
 
 	return 0;
 }
+
+int test__thread_map_remove(int subtest __maybe_unused)
+{
+	struct thread_map *threads;
+	char *str;
+	int i;
+
+	TEST_ASSERT_VAL("failed to allocate map string",
+			asprintf(&str, "%d,%d", getpid(), getppid()) >= 0);
+
+	threads = thread_map__new_str(str, NULL, 0);
+
+	TEST_ASSERT_VAL("failed to allocate thread_map",
+			threads);
+
+	if (verbose)
+		thread_map__fprintf(threads, stderr);
+
+	TEST_ASSERT_VAL("failed to remove thread",
+			!thread_map__remove(threads, 0));
+
+	TEST_ASSERT_VAL("thread_map count != 1", threads->nr == 1);
+
+	if (verbose)
+		thread_map__fprintf(threads, stderr);
+
+	TEST_ASSERT_VAL("failed to remove thread",
+			!thread_map__remove(threads, 0));
+
+	TEST_ASSERT_VAL("thread_map count != 0", threads->nr == 0);
+
+	if (verbose)
+		thread_map__fprintf(threads, stderr);
+
+	TEST_ASSERT_VAL("failed to not remove thread",
+			thread_map__remove(threads, 0));
+
+	for (i = 0; i < threads->nr; i++)
+		free(threads->map[i].comm);
+
+	free(threads);
+	return 0;
+}
diff --git a/tools/perf/util/thread_map.c b/tools/perf/util/thread_map.c
index 40585f5b7027..f9eab200fd75 100644
--- a/tools/perf/util/thread_map.c
+++ b/tools/perf/util/thread_map.c
@@ -448,3 +448,25 @@ bool thread_map__has(struct thread_map *threads, pid_t pid)
 
 	return false;
 }
+
+int thread_map__remove(struct thread_map *threads, int idx)
+{
+	int i;
+
+	if (threads->nr < 1)
+		return -EINVAL;
+
+	if (idx >= threads->nr)
+		return -EINVAL;
+
+	/*
+	 * Free the 'idx' item and shift the rest up.
+	 */
+	free(threads->map[idx].comm);
+
+	for (i = idx; i < threads->nr - 1; i++)
+		threads->map[i] = threads->map[i + 1];
+
+	threads->nr--;
+	return 0;
+}
diff --git a/tools/perf/util/thread_map.h b/tools/perf/util/thread_map.h
index bd3b971588da..ea0ef08c6303 100644
--- a/tools/perf/util/thread_map.h
+++ b/tools/perf/util/thread_map.h
@@ -58,4 +58,5 @@ static inline char *thread_map__comm(struct thread_map *map, int thread)
 
 void thread_map__read_comms(struct thread_map *threads);
 bool thread_map__has(struct thread_map *threads, pid_t pid);
+int thread_map__remove(struct thread_map *threads, int idx);
 #endif	/* __PERF_THREAD_MAP_H */
-- 
2.9.3

^ permalink raw reply related	[flat|nested] 23+ messages in thread

* [PATCH 20/22] perf evsel: Allow to ignore missing pid
  2016-12-13 15:09 [GIT PULL 00/22] perf/core improvements and fixes Arnaldo Carvalho de Melo
                   ` (18 preceding siblings ...)
  2016-12-13 15:09 ` [PATCH 19/22] perf thread_map: Add thread_map__remove function Arnaldo Carvalho de Melo
@ 2016-12-13 15:09 ` Arnaldo Carvalho de Melo
  2016-12-13 15:09 ` [PATCH 21/22] perf record: Force ignore_missing_thread for uid option Arnaldo Carvalho de Melo
  2016-12-13 15:09 ` [PATCH 22/22] samples/bpf: Drop unnecessary build targets Arnaldo Carvalho de Melo
  21 siblings, 0 replies; 23+ messages in thread
From: Arnaldo Carvalho de Melo @ 2016-12-13 15:09 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: linux-kernel, Jiri Olsa, Jiri Olsa, David Ahern, Namhyung Kim,
	Peter Zijlstra, Arnaldo Carvalho de Melo

From: Jiri Olsa <jolsa@redhat.com>

Adding perf_evsel::ignore_missing_cpu_thread bool.

When set true, it allows perf to ignore error of missing pid of perf
event syscall.

We remove missing thread id from the thread_map, so the rest of the
processing like ioctl and mmap won't get disturbed with -1 fd.

The reason for supporting this is to ease up monitoring group of pids,
that 'disappear' before perf opens their event. This currently leads
perf to report error and exit and makes perf record's -u option unusable
under certain setup.

With this change we will allow this race and ignore such failure with
following warning:

  WARNING: Ignored open failure for pid 8605

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20161213074622.GA3084@krava
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/perf.h       |  1 +
 tools/perf/util/evsel.c | 44 ++++++++++++++++++++++++++++++++++++++++++++
 tools/perf/util/evsel.h |  1 +
 3 files changed, 46 insertions(+)

diff --git a/tools/perf/perf.h b/tools/perf/perf.h
index 9a0236a4cf95..1c27d947c2fe 100644
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -55,6 +55,7 @@ struct record_opts {
 	bool	     all_user;
 	bool	     tail_synthesize;
 	bool	     overwrite;
+	bool	     ignore_missing_thread;
 	unsigned int freq;
 	unsigned int mmap_pages;
 	unsigned int auxtrace_mmap_pages;
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index fd61ebd77c26..04e536ae4d88 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -990,6 +990,8 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts,
 	 * it overloads any global configuration.
 	 */
 	apply_config_terms(evsel, opts);
+
+	evsel->ignore_missing_thread = opts->ignore_missing_thread;
 }
 
 static int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
@@ -1419,6 +1421,33 @@ static int __open_attr__fprintf(FILE *fp, const char *name, const char *val,
 	return fprintf(fp, "  %-32s %s\n", name, val);
 }
 
+static bool ignore_missing_thread(struct perf_evsel *evsel,
+				  struct thread_map *threads,
+				  int thread, int err)
+{
+	if (!evsel->ignore_missing_thread)
+		return false;
+
+	/* The system wide setup does not work with threads. */
+	if (evsel->system_wide)
+		return false;
+
+	/* The -ESRCH is perf event syscall errno for pid's not found. */
+	if (err != -ESRCH)
+		return false;
+
+	/* If there's only one thread, let it fail. */
+	if (threads->nr == 1)
+		return false;
+
+	if (thread_map__remove(threads, thread))
+		return false;
+
+	pr_warning("WARNING: Ignored open failure for pid %d\n",
+		   thread_map__pid(threads, thread));
+	return true;
+}
+
 static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
 			      struct thread_map *threads)
 {
@@ -1491,6 +1520,21 @@ static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
 
 			if (fd < 0) {
 				err = -errno;
+
+				if (ignore_missing_thread(evsel, threads, thread, err)) {
+					/*
+					 * We just removed 1 thread, so take a step
+					 * back on thread index and lower the upper
+					 * nthreads limit.
+					 */
+					nthreads--;
+					thread--;
+
+					/* ... and pretend like nothing have happened. */
+					err = 0;
+					continue;
+				}
+
 				pr_debug2("\nsys_perf_event_open failed, error %d\n",
 					  err);
 				goto try_fallback;
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index 6abb89cd27f9..06ef6f29efa1 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -120,6 +120,7 @@ struct perf_evsel {
 	bool			tracking;
 	bool			per_pkg;
 	bool			precise_max;
+	bool			ignore_missing_thread;
 	/* parse modifier helper */
 	int			exclude_GH;
 	int			nr_members;
-- 
2.9.3

^ permalink raw reply related	[flat|nested] 23+ messages in thread

* [PATCH 21/22] perf record: Force ignore_missing_thread for uid option
  2016-12-13 15:09 [GIT PULL 00/22] perf/core improvements and fixes Arnaldo Carvalho de Melo
                   ` (19 preceding siblings ...)
  2016-12-13 15:09 ` [PATCH 20/22] perf evsel: Allow to ignore missing pid Arnaldo Carvalho de Melo
@ 2016-12-13 15:09 ` Arnaldo Carvalho de Melo
  2016-12-13 15:09 ` [PATCH 22/22] samples/bpf: Drop unnecessary build targets Arnaldo Carvalho de Melo
  21 siblings, 0 replies; 23+ messages in thread
From: Arnaldo Carvalho de Melo @ 2016-12-13 15:09 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: linux-kernel, Jiri Olsa, David Ahern, Namhyung Kim,
	Peter Zijlstra, Arnaldo Carvalho de Melo

From: Jiri Olsa <jolsa@kernel.org>

Enable perf_evsel::ignore_missing_thread for -u option to ignore
complete failure if any of the user's processes die between its
enumeration and time we open the event.

Committer notes:

While doing a 'make -j4 allmodconfig' we sometimes get into the race:

Before:

  # perf record -u acme
  Error:
  The sys_perf_event_open() syscall returned with 3 (No such process) for event (cycles:ppp).
  /bin/dmesg may provide additional information.
  No CONFIG_PERF_EVENTS=y kernel support configured?
  #

After:

  [root@jouet ~]# perf record -u acme
  WARNING: Ignored open failure for pid 9888
  WARNING: Ignored open failure for pid 18059
  [root@jouet ~]#

Which is an improvement, with the races not preventing the remaining threads
for the specified user from being monitored, but the message probably needs
further clarification.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1481538943-21874-6-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/builtin-record.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index fa26865364b6..74d6a035133a 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -1687,6 +1687,9 @@ int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused)
 		goto out;
 	}
 
+	/* Enable ignoring missing threads when -u option is defined. */
+	rec->opts.ignore_missing_thread = rec->opts.target.uid != UINT_MAX;
+
 	err = -ENOMEM;
 	if (perf_evlist__create_maps(rec->evlist, &rec->opts.target) < 0)
 		usage_with_options(record_usage, record_options);
-- 
2.9.3

^ permalink raw reply related	[flat|nested] 23+ messages in thread

* [PATCH 22/22] samples/bpf: Drop unnecessary build targets.
  2016-12-13 15:09 [GIT PULL 00/22] perf/core improvements and fixes Arnaldo Carvalho de Melo
                   ` (20 preceding siblings ...)
  2016-12-13 15:09 ` [PATCH 21/22] perf record: Force ignore_missing_thread for uid option Arnaldo Carvalho de Melo
@ 2016-12-13 15:09 ` Arnaldo Carvalho de Melo
  21 siblings, 0 replies; 23+ messages in thread
From: Arnaldo Carvalho de Melo @ 2016-12-13 15:09 UTC (permalink / raw)
  To: Ingo Molnar
  Cc: linux-kernel, Joe Stringer, Alexei Starovoitov, Daniel Borkmann,
	Arnaldo Carvalho de Melo

From: Joe Stringer <joe@ovn.org>

Commit f72179ef11db ("samples/bpf: Switch over to libbpf") added these
two makefile changes that were unnecessary for switching samples to use
libbpf. The extra make is already handled by the build dependency, and
libbpf target doesn't build because it lacks main(). Remove these.

Reported-by: Wang Nan <wangnan0@huawei.com>
Signed-off-by: Joe Stringer <joe@ovn.org>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Link: http://lkml.kernel.org/r/20161209175109.6779-1-joe@ovn.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 samples/bpf/Makefile   | 1 -
 tools/lib/bpf/Makefile | 2 --
 2 files changed, 3 deletions(-)

diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 9ffa6a2c061d..60ffc8115b67 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -127,7 +127,6 @@ CLANG ?= clang
 
 # Trick to allow make to be run from this directory
 all:
-	$(MAKE) -C ../../ tools/lib/bpf/
 	$(MAKE) -C ../../ $$PWD/
 
 clean:
diff --git a/tools/lib/bpf/Makefile b/tools/lib/bpf/Makefile
index 616bd55f3be8..62d89d50fcbd 100644
--- a/tools/lib/bpf/Makefile
+++ b/tools/lib/bpf/Makefile
@@ -149,8 +149,6 @@ CMD_TARGETS = $(LIB_FILE)
 
 TARGETS = $(CMD_TARGETS)
 
-libbpf: all
-
 all: fixdep $(VERSION_FILES) all_cmd
 
 all_cmd: $(CMD_TARGETS)
-- 
2.9.3

^ permalink raw reply related	[flat|nested] 23+ messages in thread

end of thread, other threads:[~2016-12-13 15:15 UTC | newest]

Thread overview: 23+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2016-12-13 15:09 [GIT PULL 00/22] perf/core improvements and fixes Arnaldo Carvalho de Melo
2016-12-13 15:09 ` [PATCH 01/22] perf tools: Move headers check into bash script Arnaldo Carvalho de Melo
2016-12-13 15:09 ` [PATCH 02/22] perf sched timehist: Split is_idle_sample() Arnaldo Carvalho de Melo
2016-12-13 15:09 ` [PATCH 03/22] perf sched timehist: Introduce struct idle_time_data Arnaldo Carvalho de Melo
2016-12-13 15:09 ` [PATCH 04/22] perf sched timehist: Save callchain when entering idle Arnaldo Carvalho de Melo
2016-12-13 15:09 ` [PATCH 05/22] perf sched timehist: Skip non-idle events when necessary Arnaldo Carvalho de Melo
2016-12-13 15:09 ` [PATCH 06/22] perf sched timehist: Add -I/--idle-hist option Arnaldo Carvalho de Melo
2016-12-13 15:09 ` [PATCH 07/22] perf sched timehist: Show callchains for idle stat Arnaldo Carvalho de Melo
2016-12-13 15:09 ` [PATCH 08/22] tools lib bpf: Sync {tools,}/include/uapi/linux/bpf.h Arnaldo Carvalho de Melo
2016-12-13 15:09 ` [PATCH 09/22] tools lib bpf: use __u32 from linux/types.h Arnaldo Carvalho de Melo
2016-12-13 15:09 ` [PATCH 10/22] tools lib bpf: Add flags to bpf_create_map() Arnaldo Carvalho de Melo
2016-12-13 15:09 ` [PATCH 11/22] samples/bpf: Make samples more libbpf-centric Arnaldo Carvalho de Melo
2016-12-13 15:09 ` [PATCH 12/22] samples/bpf: Switch over to libbpf Arnaldo Carvalho de Melo
2016-12-13 15:09 ` [PATCH 13/22] samples/bpf: Remove perf_event_open() declaration Arnaldo Carvalho de Melo
2016-12-13 15:09 ` [PATCH 14/22] samples/bpf: Move open_raw_sock to separate header Arnaldo Carvalho de Melo
2016-12-13 15:09 ` [PATCH 15/22] perf sdt: Add scanning of sdt probles arguments Arnaldo Carvalho de Melo
2016-12-13 15:09 ` [PATCH 16/22] perf tools: Remove some needless __maybe_unused Arnaldo Carvalho de Melo
2016-12-13 15:09 ` [PATCH 17/22] perf mem: Fix --all-user/--all-kernel options Arnaldo Carvalho de Melo
2016-12-13 15:09 ` [PATCH 18/22] perf evsel: Use variable instead of repeating lengthy FD macro Arnaldo Carvalho de Melo
2016-12-13 15:09 ` [PATCH 19/22] perf thread_map: Add thread_map__remove function Arnaldo Carvalho de Melo
2016-12-13 15:09 ` [PATCH 20/22] perf evsel: Allow to ignore missing pid Arnaldo Carvalho de Melo
2016-12-13 15:09 ` [PATCH 21/22] perf record: Force ignore_missing_thread for uid option Arnaldo Carvalho de Melo
2016-12-13 15:09 ` [PATCH 22/22] samples/bpf: Drop unnecessary build targets Arnaldo Carvalho de Melo

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).