From: tip-bot2 for Alexey Budankov <tip-bot2@linutronix.de>
To: linux-tip-commits@vger.kernel.org
Cc: linux-kernel@vger.kernel.org,
Peter Zijlstra <peterz@infradead.org>,
Namhyung Kim <namhyung@kernel.org>,
Kan Liang <kan.liang@linux.intel.com>,
Jiri Olsa <jolsa@redhat.com>, Jin Yao <yao.jin@linux.intel.com>,
Andi Kleen <ak@linux.intel.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Alexey Budankov <alexey.budankov@linux.intel.com>
Subject: [tip: perf/core] perf report: Prefer DWARF callstacks to LBR ones when captured both
Date: Fri, 23 Aug 2019 02:28:08 -0000 [thread overview]
Message-ID: <156652728884.12704.14948438831949421867.tip-bot2@tip-bot2> (raw)
In-Reply-To: <ccbd9583-82f4-dec5-7e84-64bf56e351fb@linux.intel.com>
The following commit has been merged into the perf/core branch of tip:
Commit-ID: 10ccbc1cc0b8a05a5c8491630d36d1e2672036c1
Gitweb: https://git.kernel.org/tip/10ccbc1cc0b8a05a5c8491630d36d1e2672036c1
Author: Alexey Budankov <alexey.budankov@linux.intel.com>
AuthorDate: Fri, 09 Aug 2019 18:31:28 +03:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Tue, 20 Aug 2019 12:20:16 -03:00
perf report: Prefer DWARF callstacks to LBR ones when captured both
Display DWARF based callchains when the perf.data file contains raw thread
stack data as LBR callstack data.
Commiter testing:
This changes the output from the branch stack based one, i.e. without
this patch, for the same file as in the previous csets:
# perf report --stdio
# To display the perf.data header info, please use --header/--header-only options.
#
# Total Lost Samples: 0
#
# Samples: 13 of event 'cycles'
# Event count (approx.): 13
#
# Overhead Command Source Shared Object Source Symbol Target Symbol Basic Block Cycles
# ........ ....... .................... ........................... ......................................... ..................
#
7.69% ls libpthread-2.29.so [.] _init [.] __pthread_initialize_minimal_internal 6827
7.69% ls ld-2.29.so [k] _start [k] _dl_start -
7.69% ls ld-2.29.so [.] _dl_start_user [.] _dl_init -24790
7.69% ls ld-2.29.so [k] _dl_start [k] _dl_sysdep_start 278
7.69% ls ld-2.29.so [k] dl_main [k] _dl_map_object_deps 15581
7.69% ls ld-2.29.so [k] open_verify.constprop.0 [k] lseek64 4228
7.69% ls ld-2.29.so [k] _dl_map_object [k] open_verify.constprop.0 55
7.69% ls ld-2.29.so [k] openaux [k] _dl_map_object 67
7.69% ls ld-2.29.so [k] _dl_map_object_deps [k] 0x00007f441b57c090 112
7.69% ls ld-2.29.so [.] call_init.part.0 [.] _init 334
7.69% ls ld-2.29.so [.] _dl_init [.] call_init.part.0 383
7.69% ls ld-2.29.so [k] _dl_sysdep_start [k] dl_main 45
7.69% ls ld-2.29.so [k] _dl_catch_exception [k] openaux 116
#
# (Tip: For memory address profiling, try: perf mem record / perf mem report)
#
To the one that shows call chains:
# perf report --stdio
# To display the perf.data header info, please use --header/--header-only options.
#
#
# Total Lost Samples: 0
#
# Samples: 10 of event 'cycles'
# Event count (approx.): 3204047
#
# Children Self Command Shared Object Symbol
# ........ ........ ....... .................. .........................................
#
55.01% 0.00% ls [kernel.vmlinux] [k] entry_SYSCALL_64_after_hwframe
|
---entry_SYSCALL_64_after_hwframe
do_syscall_64
|
--16.01%--__x64_sys_execve
__do_execve_file.isra.0
search_binary_handler
load_elf_binary
elf_map
vm_mmap_pgoff
do_mmap
mmap_region
perf_event_mmap
perf_iterate_sb
perf_iterate_ctx
perf_event_mmap_output
perf_output_copy
memcpy_erms
55.01% 39.00% ls [kernel.vmlinux] [k] do_syscall_64
|
|--39.00%--0xffffffffffffffff
| _dl_map_object
| open_verify.constprop.0
| __lseek64 (inlined)
| entry_SYSCALL_64_after_hwframe
| do_syscall_64
|
--16.01%--do_syscall_64
__x64_sys_execve
__do_execve_file.isra.0
search_binary_handler
load_elf_binary
elf_map
vm_mmap_pgoff
do_mmap
mmap_region
perf_event_mmap
perf_iterate_sb
perf_iterate_ctx
perf_event_mmap_output
perf_output_copy
memcpy_erms
42.95% 42.95% ls libpthread-2.29.so [.] __pthread_initialize_minimal_internal
|
---_init
__pthread_initialize_minimal_internal
42.95% 0.00% ls libpthread-2.29.so [.] _init
|
---_init
__pthread_initialize_minimal_internal
<SNIP>
#
# (Tip: Profiling branch (mis)predictions with: perf record -b / perf report)
#
#
The branch stack view be explicitely selected using:
# perf report -h branch-stack
Usage: perf report [<options>]
-b, --branch-stack use branch records for per branch histogram filling
#
I.e. after this patch:
# perf report -b --stdio
# To display the perf.data header info, please use --header/--header-only options.
#
#
# Total Lost Samples: 0
#
# Samples: 13 of event 'cycles'
# Event count (approx.): 13
#
# Overhead Command Source Shared Object Source Symbol Target Symbol Basic Block Cycles
# ........ ....... .................... ........................... ......................................... ..................
#
7.69% ls libpthread-2.29.so [.] _init [.] __pthread_initialize_minimal_internal 6827
7.69% ls ld-2.29.so [k] _start [k] _dl_start -
7.69% ls ld-2.29.so [.] _dl_start_user [.] _dl_init -24790
7.69% ls ld-2.29.so [k] _dl_start [k] _dl_sysdep_start 278
7.69% ls ld-2.29.so [k] dl_main [k] _dl_map_object_deps 15581
7.69% ls ld-2.29.so [k] open_verify.constprop.0 [k] lseek64 4228
7.69% ls ld-2.29.so [k] _dl_map_object [k] open_verify.constprop.0 55
7.69% ls ld-2.29.so [k] openaux [k] _dl_map_object 67
7.69% ls ld-2.29.so [k] _dl_map_object_deps [k] 0x00007f441b57c090 112
7.69% ls ld-2.29.so [.] call_init.part.0 [.] _init 334
7.69% ls ld-2.29.so [.] _dl_init [.] call_init.part.0 383
7.69% ls ld-2.29.so [k] _dl_sysdep_start [k] dl_main 45
7.69% ls ld-2.29.so [k] _dl_catch_exception [k] openaux 116
#
# (Tip: Show current config key-value pairs: perf config --list)
#
#
Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/ccbd9583-82f4-dec5-7e84-64bf56e351fb@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/builtin-report.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 5e003d0..79dfb11 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -1281,6 +1281,8 @@ int cmd_report(int argc, const char **argv)
has_br_stack = perf_header__has_feat(&session->header,
HEADER_BRANCH_STACK);
+ if (perf_evlist__combined_sample_type(session->evlist) & PERF_SAMPLE_STACK_USER)
+ has_br_stack = false;
setup_forced_leader(&report, session->evlist);
prev parent reply other threads:[~2019-08-23 2:28 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-09 15:16 [PATCH v1 0/3] collect LBR callstack together with thread stack data Alexey Budankov
2019-08-09 15:23 ` [PATCH v1 1/3] perf record: enable LBR callstack capture jointly with thread stack Alexey Budankov
2019-08-23 2:28 ` [tip: perf/core] perf record: Enable " tip-bot2 for Alexey Budankov
2019-08-09 15:26 ` [PATCH v1 2/3] perf report: dump LBR callstack data by -D " Alexey Budankov
2019-08-23 2:28 ` [tip: perf/core] perf report: Dump " tip-bot2 for Alexey Budankov
2019-08-09 15:31 ` [PATCH v1 3/3] perf report: prefer dwarf callstacks to LBR ones when captured both Alexey Budankov
2019-08-23 2:28 ` tip-bot2 for Alexey Budankov [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=156652728884.12704.14948438831949421867.tip-bot2@tip-bot2 \
--to=tip-bot2@linutronix.de \
--cc=acme@redhat.com \
--cc=ak@linux.intel.com \
--cc=alexander.shishkin@linux.intel.com \
--cc=alexey.budankov@linux.intel.com \
--cc=jolsa@redhat.com \
--cc=kan.liang@linux.intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-tip-commits@vger.kernel.org \
--cc=namhyung@kernel.org \
--cc=peterz@infradead.org \
--cc=yao.jin@linux.intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
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).