[PATCH v3 0/5] Perf tool fixes for ARC + uClibc

[PATCH v3 0/5] Perf tool fixes for ARC + uClibc

[Vineet Gupta]

Hi,

This series based off linux-next of 20150105 allows us to build/use perf
for ARC with uClibc based userland.

v3: Changes since v2 [2]
* 1/5	: Ack from Jiri
* 2/5	: no changes
* 3/5	: sys/syscall.h included	  [Jiri]
* 4/5	: no changes
* 5/5	: -lpthread added to link target  [Jiri]
* {1,5} : Changelog updated so scissor lines don't start at column 1

v2: Change since v1 [1]
* [1-3]/5 : no changes
* 4/5     : Make perf_evsel__alloc_id agnostic of zero threads [Namhyung Kim]
* 5/5     : Add missing test file

v1:
* 1/5 is really a resend of old patch posted by Alexey a while back
* 2/5 is uClibc build spew seen on ARM as well
* 3/5 likewise
* 4/5 is uClibc config specific
* 5/5 is uClibc pthread library flavour specific
  It adds a stub for pthread_attr_setaffinity_np
  I can rework it to disable the futex tests altogether if people think that is
  cleaner

Please review and consider applying.
W/o these perf doesn't build and/or work for ARC.

[1] http://www.spinics.net/linux/lists/kernel/msg1897268.html
[2] http://www.spinics.net/linux/lists/kernel/msg1900706.html

Thx,
-Vineet


Alexey Brodkin (1):
  perf tools: [uclibc] fix statfs.f_type data type mismatch build error

Vineet Gupta (4):
  perf tools: [uclibc] Elide strlcpy warning
  perf tools: [uclibc] Avoid build splat for syscall numbers
  perf tools: [uclibc] don't rely on glibc malloc working for sz 0
  perf tools: [uclibc] provide stub for pthread_attr_setaffinity_np

 tools/lib/api/fs/debugfs.c                                 |  2 +-
 tools/lib/api/fs/fs.c                                      |  2 +-
 tools/perf/bench/futex.h                                   | 13 +++++++++++++
 tools/perf/bench/sched-pipe.c                              |  2 +-
 tools/perf/builtin-top.c                                   |  1 -
 tools/perf/config/Makefile                                 |  6 ++++++
 tools/perf/config/feature-checks/Makefile                  |  4 ++++
 tools/perf/config/feature-checks/test-all.c                |  5 +++++
 .../feature-checks/test-pthread-attr-setaffinity-np.c      | 14 ++++++++++++++
 tools/perf/perf-sys.h                                      |  1 -
 tools/perf/util/cache.h                                    |  2 ++
 tools/perf/util/evsel.c                                    |  3 +++
 12 files changed, 50 insertions(+), 5 deletions(-)
 create mode 100644 tools/perf/config/feature-checks/test-pthread-attr-setaffinity-np.c

-- 
1.9.1

[PATCH v3 0/5] Perf tool fixes for ARC + uClibc

[Vineet Gupta]

Hi,

This series based off linux-next of 20150105 allows us to build/use perf
for ARC with uClibc based userland.

v3: Changes since v2 [2]
* 1/5	: Ack from Jiri
* 2/5	: no changes
* 3/5	: sys/syscall.h included	  [Jiri]
* 4/5	: no changes
* 5/5	: -lpthread added to link target  [Jiri]
* {1,5} : Changelog updated so scissor lines don't start at column 1

v2: Change since v1 [1]
* [1-3]/5 : no changes
* 4/5     : Make perf_evsel__alloc_id agnostic of zero threads [Namhyung Kim]
* 5/5     : Add missing test file

v1:
* 1/5 is really a resend of old patch posted by Alexey a while back
* 2/5 is uClibc build spew seen on ARM as well
* 3/5 likewise
* 4/5 is uClibc config specific
* 5/5 is uClibc pthread library flavour specific
  It adds a stub for pthread_attr_setaffinity_np
  I can rework it to disable the futex tests altogether if people think that is
  cleaner

Please review and consider applying.
W/o these perf doesn't build and/or work for ARC.

[1] http://www.spinics.net/linux/lists/kernel/msg1897268.html
[2] http://www.spinics.net/linux/lists/kernel/msg1900706.html

Thx,
-Vineet


Alexey Brodkin (1):
  perf tools: [uclibc] fix statfs.f_type data type mismatch build error

Vineet Gupta (4):
  perf tools: [uclibc] Elide strlcpy warning
  perf tools: [uclibc] Avoid build splat for syscall numbers
  perf tools: [uclibc] don't rely on glibc malloc working for sz 0
  perf tools: [uclibc] provide stub for pthread_attr_setaffinity_np

 tools/lib/api/fs/debugfs.c                                 |  2 +-
 tools/lib/api/fs/fs.c                                      |  2 +-
 tools/perf/bench/futex.h                                   | 13 +++++++++++++
 tools/perf/bench/sched-pipe.c                              |  2 +-
 tools/perf/builtin-top.c                                   |  1 -
 tools/perf/config/Makefile                                 |  6 ++++++
 tools/perf/config/feature-checks/Makefile                  |  4 ++++
 tools/perf/config/feature-checks/test-all.c                |  5 +++++
 .../feature-checks/test-pthread-attr-setaffinity-np.c      | 14 ++++++++++++++
 tools/perf/perf-sys.h                                      |  1 -
 tools/perf/util/cache.h                                    |  2 ++
 tools/perf/util/evsel.c                                    |  3 +++
 12 files changed, 50 insertions(+), 5 deletions(-)
 create mode 100644 tools/perf/config/feature-checks/test-pthread-attr-setaffinity-np.c

-- 
1.9.1

[PATCH v3 1/5] perf tools: [uclibc] fix statfs.f_type data type mismatch build error

[Vineet Gupta]

From: Alexey Brodkin <abrodkin@synopsys.com>

ARC Linux uses the no legacy syscalls abi and corresponding uClibc headers
statfs defines f_type to be U32 which causes perf build breakage

http://git.uclibc.org/uClibc/tree/libc/sysdeps/linux/common-generic/bits/statfs.h

   ----------->8---------------
  CC       fs/fs.o
fs/fs.c: In function 'fs__valid_mount':
fs/fs.c:82:24: error: comparison between signed and unsigned integer
expressions [-Werror=sign-compare]
  else if (st_fs.f_type != magic)
                        ^
cc1: all warnings being treated as errors
   ----------->8---------------

Cc: Borislav Petkov <bp@suse.de>
Cc: Cody P Schafer <dev@codyps.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: linux-perf-users@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Acked-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>

---
v4:
 * Add Ack from Jiri Olsa

v3: Changes since v2 [2]
 * Made Changelog a bit more concise, no code changes [vgupta]

v2: Changes since v1 [1]
 * Added type cast to DEBUGFS_MAGIC in "debugfs.c" [Arnaldo]
 * Added verbose explanation of root cause

[2] https://lkml.org/lkml/2014/9/16/296
[1] https://lkml.org/lkml/2014/8/13/529

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
 tools/lib/api/fs/debugfs.c | 2 +-
 tools/lib/api/fs/fs.c      | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/lib/api/fs/debugfs.c b/tools/lib/api/fs/debugfs.c
index a74fba6d7743..93aa4cd2416f 100644
--- a/tools/lib/api/fs/debugfs.c
+++ b/tools/lib/api/fs/debugfs.c
@@ -67,7 +67,7 @@ int debugfs_valid_mountpoint(const char *debugfs)
 
 	if (statfs(debugfs, &st_fs) < 0)
 		return -ENOENT;
-	else if (st_fs.f_type != (long) DEBUGFS_MAGIC)
+	else if ((long) st_fs.f_type != (long) DEBUGFS_MAGIC)
 		return -ENOENT;
 
 	return 0;
diff --git a/tools/lib/api/fs/fs.c b/tools/lib/api/fs/fs.c
index 65d9be3f9887..15e64921ea84 100644
--- a/tools/lib/api/fs/fs.c
+++ b/tools/lib/api/fs/fs.c
@@ -79,7 +79,7 @@ static int fs__valid_mount(const char *fs, long magic)
 
 	if (statfs(fs, &st_fs) < 0)
 		return -ENOENT;
-	else if (st_fs.f_type != magic)
+	else if ((long) st_fs.f_type != magic)
 		return -ENOENT;
 
 	return 0;
-- 
1.9.1

[PATCH v3 1/5] perf tools: [uclibc] fix statfs.f_type data type mismatch build error

[Vineet Gupta]

From: Alexey Brodkin <abrodkin@synopsys.com>

ARC Linux uses the no legacy syscalls abi and corresponding uClibc headers
statfs defines f_type to be U32 which causes perf build breakage

http://git.uclibc.org/uClibc/tree/libc/sysdeps/linux/common-generic/bits/statfs.h

   ----------->8---------------
  CC       fs/fs.o
fs/fs.c: In function 'fs__valid_mount':
fs/fs.c:82:24: error: comparison between signed and unsigned integer
expressions [-Werror=sign-compare]
  else if (st_fs.f_type != magic)
                        ^
cc1: all warnings being treated as errors
   ----------->8---------------

Cc: Borislav Petkov <bp@suse.de>
Cc: Cody P Schafer <dev@codyps.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: linux-perf-users@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Acked-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>

---
v4:
 * Add Ack from Jiri Olsa

v3: Changes since v2 [2]
 * Made Changelog a bit more concise, no code changes [vgupta]

v2: Changes since v1 [1]
 * Added type cast to DEBUGFS_MAGIC in "debugfs.c" [Arnaldo]
 * Added verbose explanation of root cause

[2] https://lkml.org/lkml/2014/9/16/296
[1] https://lkml.org/lkml/2014/8/13/529

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
 tools/lib/api/fs/debugfs.c | 2 +-
 tools/lib/api/fs/fs.c      | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/lib/api/fs/debugfs.c b/tools/lib/api/fs/debugfs.c
index a74fba6d7743..93aa4cd2416f 100644
--- a/tools/lib/api/fs/debugfs.c
+++ b/tools/lib/api/fs/debugfs.c
@@ -67,7 +67,7 @@ int debugfs_valid_mountpoint(const char *debugfs)
 
 	if (statfs(debugfs, &st_fs) < 0)
 		return -ENOENT;
-	else if (st_fs.f_type != (long) DEBUGFS_MAGIC)
+	else if ((long) st_fs.f_type != (long) DEBUGFS_MAGIC)
 		return -ENOENT;
 
 	return 0;
diff --git a/tools/lib/api/fs/fs.c b/tools/lib/api/fs/fs.c
index 65d9be3f9887..15e64921ea84 100644
--- a/tools/lib/api/fs/fs.c
+++ b/tools/lib/api/fs/fs.c
@@ -79,7 +79,7 @@ static int fs__valid_mount(const char *fs, long magic)
 
 	if (statfs(fs, &st_fs) < 0)
 		return -ENOENT;
-	else if (st_fs.f_type != magic)
+	else if ((long) st_fs.f_type != magic)
 		return -ENOENT;
 
 	return 0;
-- 
1.9.1

[PATCH v3 2/5] perf tools: [uclibc] Elide strlcpy warning

[Vineet Gupta]

   ----------------->8------------------
  CC       bench/sched-pipe.o
In file included from builtin-annotate.c:13:0:
util/cache.h:76:15: warning: redundant redeclaration of 'strlcpy'
[-Wredundant-decls]
 extern size_t strlcpy(char *dest, const char *src, size_t size);
               ^
In file included from util/util.h:55:0,
                 from builtin.h:4,
                 from builtin-annotate.c:8:
~/vineetg/arc/gnu/INSTALL_1412-arc-2014.12-rc1/arc-snps-linux-uclibc/sysroot/usr/include/string.h:396:15:
note: previous declaration of 'strlcpy' was here
 extern size_t strlcpy(char *__restrict dst, const char *__restrict src,
   ----------------->8------------------

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
 tools/perf/util/cache.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/perf/util/cache.h b/tools/perf/util/cache.h
index 5cf9e1b5989d..d04d770d90f6 100644
--- a/tools/perf/util/cache.h
+++ b/tools/perf/util/cache.h
@@ -71,7 +71,9 @@ extern char *perf_path(const char *fmt, ...) __attribute__((format (printf, 1, 2
 extern char *perf_pathdup(const char *fmt, ...)
 	__attribute__((format (printf, 1, 2)));
 
+#ifndef __UCLIBC__
 /* Matches the libc/libbsd function attribute so we declare this unconditionally: */
 extern size_t strlcpy(char *dest, const char *src, size_t size);
+#endif
 
 #endif /* __PERF_CACHE_H */
-- 
1.9.1

[PATCH v3 2/5] perf tools: [uclibc] Elide strlcpy warning

[Vineet Gupta]

   ----------------->8------------------
  CC       bench/sched-pipe.o
In file included from builtin-annotate.c:13:0:
util/cache.h:76:15: warning: redundant redeclaration of 'strlcpy'
[-Wredundant-decls]
 extern size_t strlcpy(char *dest, const char *src, size_t size);
               ^
In file included from util/util.h:55:0,
                 from builtin.h:4,
                 from builtin-annotate.c:8:
~/vineetg/arc/gnu/INSTALL_1412-arc-2014.12-rc1/arc-snps-linux-uclibc/sysroot/usr/include/string.h:396:15:
note: previous declaration of 'strlcpy' was here
 extern size_t strlcpy(char *__restrict dst, const char *__restrict src,
   ----------------->8------------------

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
 tools/perf/util/cache.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/perf/util/cache.h b/tools/perf/util/cache.h
index 5cf9e1b5989d..d04d770d90f6 100644
--- a/tools/perf/util/cache.h
+++ b/tools/perf/util/cache.h
@@ -71,7 +71,9 @@ extern char *perf_path(const char *fmt, ...) __attribute__((format (printf, 1, 2
 extern char *perf_pathdup(const char *fmt, ...)
 	__attribute__((format (printf, 1, 2)));
 
+#ifndef __UCLIBC__
 /* Matches the libc/libbsd function attribute so we declare this unconditionally: */
 extern size_t strlcpy(char *dest, const char *src, size_t size);
+#endif
 
 #endif /* __PERF_CACHE_H */
-- 
1.9.1

[PATCH v3 3/5] perf tools: [uclibc] Avoid build splat for syscall numbers

[Vineet Gupta]

This is due to duplicated unistd inclusion (via uClibc headers + kernel headers)
Also seen on ARM uClibc based tools

   ------- ARC build ---------->8-------------

  CC       util/evlist.o
In file included from
~/arc/k.org/arch/arc/include/uapi/asm/unistd.h:25:0,
                 from util/../perf-sys.h:10,
                 from util/../perf.h:15,
                 from util/event.h:7,
                 from util/event.c:3:
~/arc/k.org/include/uapi/asm-generic/unistd.h:906:0:
warning: "__NR_fcntl64" redefined [enabled by default]
 #define __NR_fcntl64 __NR3264_fcntl
 ^
In file included from
~/arc/gnu/INSTALL_1412-arc-2014.12-rc1/arc-snps-linux-uclibc/sysroot/usr/include/sys/syscall.h:24:0,
                 from util/../perf-sys.h:6,
   ----------------->8-------------------

   ------- ARM build ---------->8-------------

  CC FPIC  plugin_scsi.o
In file included from util/../perf-sys.h:9:0,
                 from util/../perf.h:15,
                 from util/cache.h:7,
                 from perf.c:12:
~/arc/k.org/arch/arm/include/uapi/asm/unistd.h:28:0:
warning: "__NR_restart_syscall" redefined [enabled by default]
In file included from
~/buildroot/host/usr/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/sys/syscall.h:25:0,
                 from util/../perf-sys.h:6,
                 from util/../perf.h:15,
                 from util/cache.h:7,
                 from perf.c:12:
~/buildroot/host/usr/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/bits/sysnum.h:17:0:
note: this is the location of the previous definition
   ----------------->8-------------------

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
 tools/perf/bench/sched-pipe.c | 2 +-
 tools/perf/builtin-top.c      | 1 -
 tools/perf/perf-sys.h         | 1 -
 3 files changed, 1 insertion(+), 3 deletions(-)

diff --git a/tools/perf/bench/sched-pipe.c b/tools/perf/bench/sched-pipe.c
index 07a8d7646a15..005cc283790c 100644
--- a/tools/perf/bench/sched-pipe.c
+++ b/tools/perf/bench/sched-pipe.c
@@ -19,12 +19,12 @@
 #include <stdlib.h>
 #include <signal.h>
 #include <sys/wait.h>
-#include <linux/unistd.h>
 #include <string.h>
 #include <errno.h>
 #include <assert.h>
 #include <sys/time.h>
 #include <sys/types.h>
+#include <sys/syscall.h>
 
 #include <pthread.h>
 
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 0aa7747ff139..233ffff1b31b 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -66,7 +66,6 @@
 #include <sys/utsname.h>
 #include <sys/mman.h>
 
-#include <linux/unistd.h>
 #include <linux/types.h>
 
 static volatile int done;
diff --git a/tools/perf/perf-sys.h b/tools/perf/perf-sys.h
index 3183809ff6d9..7b7cb7396b69 100644
--- a/tools/perf/perf-sys.h
+++ b/tools/perf/perf-sys.h
@@ -6,7 +6,6 @@
 #include <sys/syscall.h>
 #include <linux/types.h>
 #include <linux/perf_event.h>
-#include <asm/unistd.h>
 
 #if defined(__i386__)
 #define mb()		asm volatile("lock; addl $0,0(%%esp)" ::: "memory")
-- 
1.9.1

[PATCH v3 3/5] perf tools: [uclibc] Avoid build splat for syscall numbers

[Vineet Gupta]

This is due to duplicated unistd inclusion (via uClibc headers + kernel headers)
Also seen on ARM uClibc based tools

   ------- ARC build ---------->8-------------

  CC       util/evlist.o
In file included from
~/arc/k.org/arch/arc/include/uapi/asm/unistd.h:25:0,
                 from util/../perf-sys.h:10,
                 from util/../perf.h:15,
                 from util/event.h:7,
                 from util/event.c:3:
~/arc/k.org/include/uapi/asm-generic/unistd.h:906:0:
warning: "__NR_fcntl64" redefined [enabled by default]
 #define __NR_fcntl64 __NR3264_fcntl
 ^
In file included from
~/arc/gnu/INSTALL_1412-arc-2014.12-rc1/arc-snps-linux-uclibc/sysroot/usr/include/sys/syscall.h:24:0,
                 from util/../perf-sys.h:6,
   ----------------->8-------------------

   ------- ARM build ---------->8-------------

  CC FPIC  plugin_scsi.o
In file included from util/../perf-sys.h:9:0,
                 from util/../perf.h:15,
                 from util/cache.h:7,
                 from perf.c:12:
~/arc/k.org/arch/arm/include/uapi/asm/unistd.h:28:0:
warning: "__NR_restart_syscall" redefined [enabled by default]
In file included from
~/buildroot/host/usr/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/sys/syscall.h:25:0,
                 from util/../perf-sys.h:6,
                 from util/../perf.h:15,
                 from util/cache.h:7,
                 from perf.c:12:
~/buildroot/host/usr/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/bits/sysnum.h:17:0:
note: this is the location of the previous definition
   ----------------->8-------------------

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
 tools/perf/bench/sched-pipe.c | 2 +-
 tools/perf/builtin-top.c      | 1 -
 tools/perf/perf-sys.h         | 1 -
 3 files changed, 1 insertion(+), 3 deletions(-)

diff --git a/tools/perf/bench/sched-pipe.c b/tools/perf/bench/sched-pipe.c
index 07a8d7646a15..005cc283790c 100644
--- a/tools/perf/bench/sched-pipe.c
+++ b/tools/perf/bench/sched-pipe.c
@@ -19,12 +19,12 @@
 #include <stdlib.h>
 #include <signal.h>
 #include <sys/wait.h>
-#include <linux/unistd.h>
 #include <string.h>
 #include <errno.h>
 #include <assert.h>
 #include <sys/time.h>
 #include <sys/types.h>
+#include <sys/syscall.h>
 
 #include <pthread.h>
 
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 0aa7747ff139..233ffff1b31b 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -66,7 +66,6 @@
 #include <sys/utsname.h>
 #include <sys/mman.h>
 
-#include <linux/unistd.h>
 #include <linux/types.h>
 
 static volatile int done;
diff --git a/tools/perf/perf-sys.h b/tools/perf/perf-sys.h
index 3183809ff6d9..7b7cb7396b69 100644
--- a/tools/perf/perf-sys.h
+++ b/tools/perf/perf-sys.h
@@ -6,7 +6,6 @@
 #include <sys/syscall.h>
 #include <linux/types.h>
 #include <linux/perf_event.h>
-#include <asm/unistd.h>
 
 #if defined(__i386__)
 #define mb()		asm volatile("lock; addl $0,0(%%esp)" ::: "memory")
-- 
1.9.1

[PATCH v3 4/5] perf tools: [uclibc] don't rely on glibc malloc working for sz 0

[Vineet Gupta]

When running perf on ARC (uClibc based userspace), ran into this issue
   ------------->8----------------
	[ARCLinux]$ ./perf record ls
	bin             etc             perf            sys
	debug           init            perf.data       tmp
	[ perf record: Woken up 1 times to write data ]
	[ perf record: Captured and wrote 0.001 MB perf.data (~24 samples) ]

	[ARCLinux]$ ./perf report
	incompatible file format (rerun with -v to learn more)
   ------------->8----------------

The problem happens in the following call stack when zalloc is called
with size zero

glibc default / uClibc with MALLOC_GLIBC_COMPAT are OK, but not if that
config option is not enabled.

  cmd_report
     perf_session__new
	perf_session__open
	    perf_session__read_header
		read_attr(fd, header, &f_attr)
		nr_ids = f_attr.ids.size / sizeof(u64); <-- 0
		perf_evsel__alloc_id(vsel, 1, nr_ids)
			zalloc(ncpus * nthreads * sizeof(u64)) <-- 0

header.c: read_attr()

(gdb) p *f_attr
$17 = {
  attr = {
    type = 0,
    size = 96,
    config = 0,
    {
      sample_period = 4000,
      sample_freq = 4000
    },
...
  ids = {
    offset = 104,
    size = 0      <------
  }
}

Suggested-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
 tools/perf/util/evsel.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 1e90c8557ede..1d826d63bc20 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -797,6 +797,9 @@ int perf_evsel__enable(struct perf_evsel *evsel, int ncpus, int nthreads)
 
 int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads)
 {
+	if (ncpus == 0 || nthreads == 0)
+		return 0;
+
 	if (evsel->system_wide)
 		nthreads = 1;
 
-- 
1.9.1

[PATCH v3 4/5] perf tools: [uclibc] don't rely on glibc malloc working for sz 0

[Vineet Gupta]

When running perf on ARC (uClibc based userspace), ran into this issue
   ------------->8----------------
	[ARCLinux]$ ./perf record ls
	bin             etc             perf            sys
	debug           init            perf.data       tmp
	[ perf record: Woken up 1 times to write data ]
	[ perf record: Captured and wrote 0.001 MB perf.data (~24 samples) ]

	[ARCLinux]$ ./perf report
	incompatible file format (rerun with -v to learn more)
   ------------->8----------------

The problem happens in the following call stack when zalloc is called
with size zero

glibc default / uClibc with MALLOC_GLIBC_COMPAT are OK, but not if that
config option is not enabled.

  cmd_report
     perf_session__new
	perf_session__open
	    perf_session__read_header
		read_attr(fd, header, &f_attr)
		nr_ids = f_attr.ids.size / sizeof(u64); <-- 0
		perf_evsel__alloc_id(vsel, 1, nr_ids)
			zalloc(ncpus * nthreads * sizeof(u64)) <-- 0

header.c: read_attr()

(gdb) p *f_attr
$17 = {
  attr = {
    type = 0,
    size = 96,
    config = 0,
    {
      sample_period = 4000,
      sample_freq = 4000
    },
...
  ids = {
    offset = 104,
    size = 0      <------
  }
}

Suggested-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
 tools/perf/util/evsel.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 1e90c8557ede..1d826d63bc20 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -797,6 +797,9 @@ int perf_evsel__enable(struct perf_evsel *evsel, int ncpus, int nthreads)
 
 int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads)
 {
+	if (ncpus == 0 || nthreads == 0)
+		return 0;
+
 	if (evsel->system_wide)
 		nthreads = 1;
 
-- 
1.9.1

[PATCH v3 5/5] perf tools: [uclibc] provide stub for pthread_attr_setaffinity_np

[Vineet Gupta]

uClibc Linuxthreads.old doesnt support pthread_attr_setaffinity_np()
call

   ----------------->8-----------------------
  CC       bench/futex-hash.o
  CC       bench/futex-wake.o
bench/futex-hash.c: In function 'bench_futex_hash':
bench/futex-hash.c:161:3: error: implicit declaration of function
'pthread_attr_setaffinity_np' [-Werror=implicit-function-declaration]
   ret = pthread_attr_setaffinity_np(&thread_attr, sizeof(cpu_set_t),
&cpu);
   ^
bench/futex-hash.c:161:3: error: nested extern declaration of
'pthread_attr_setaffinity_np' [-Werror=nested-externs]
   ----------------->8-----------------------

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
 tools/perf/bench/futex.h                                   | 13 +++++++++++++
 tools/perf/config/Makefile                                 |  6 ++++++
 tools/perf/config/feature-checks/Makefile                  |  4 ++++
 tools/perf/config/feature-checks/test-all.c                |  5 +++++
 .../feature-checks/test-pthread-attr-setaffinity-np.c      | 14 ++++++++++++++
 5 files changed, 42 insertions(+)
 create mode 100644 tools/perf/config/feature-checks/test-pthread-attr-setaffinity-np.c

diff --git a/tools/perf/bench/futex.h b/tools/perf/bench/futex.h
index 71f2844cf97f..7ed22ff1e1ac 100644
--- a/tools/perf/bench/futex.h
+++ b/tools/perf/bench/futex.h
@@ -68,4 +68,17 @@ futex_cmp_requeue(u_int32_t *uaddr, u_int32_t val, u_int32_t *uaddr2, int nr_wak
 		 val, opflags);
 }
 
+#ifndef HAVE_PTHREAD_ATTR_SETAFFINITY_NP
+#include <pthread.h>
+static inline int pthread_attr_setaffinity_np(pthread_attr_t *attr,
+					      size_t cpusetsize,
+					      cpu_set_t *cpuset)
+{
+	attr = attr;
+	cpusetsize = cpusetsize;
+	cpuset = cpuset;
+	return 0;
+}
+#endif
+
 #endif /* _FUTEX_H */
diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
index 5d4b039fe1ed..6b59662136fa 100644
--- a/tools/perf/config/Makefile
+++ b/tools/perf/config/Makefile
@@ -198,6 +198,7 @@ CORE_FEATURE_TESTS =			\
 	libpython-version		\
 	libslang			\
 	libunwind			\
+	pthread-attr-setaffinity-np	\
 	stackprotector-all		\
 	timerfd				\
 	libdw-dwarf-unwind		\
@@ -226,6 +227,7 @@ VF_FEATURE_TESTS =			\
 	libelf-getphdrnum		\
 	libelf-mmap			\
 	libpython-version		\
+	pthread-attr-setaffinity-np	\
 	stackprotector-all		\
 	timerfd				\
 	libunwind-debug-frame		\
@@ -301,6 +303,10 @@ ifeq ($(feature-sync-compare-and-swap), 1)
   CFLAGS += -DHAVE_SYNC_COMPARE_AND_SWAP_SUPPORT
 endif
 
+ifeq ($(feature-pthread-attr-setaffinity-np), 1)
+  CFLAGS += -DHAVE_PTHREAD_ATTR_SETAFFINITY_NP
+endif
+
 ifndef NO_BIONIC
   $(call feature_check,bionic)
   ifeq ($(feature-bionic), 1)
diff --git a/tools/perf/config/feature-checks/Makefile b/tools/perf/config/feature-checks/Makefile
index 53f19b5dbc37..42ac05aaf8ac 100644
--- a/tools/perf/config/feature-checks/Makefile
+++ b/tools/perf/config/feature-checks/Makefile
@@ -25,6 +25,7 @@ FILES=					\
 	test-libslang.bin		\
 	test-libunwind.bin		\
 	test-libunwind-debug-frame.bin	\
+	test-pthread-attr-setaffinity-np.bin	\
 	test-stackprotector-all.bin	\
 	test-timerfd.bin		\
 	test-libdw-dwarf-unwind.bin	\
@@ -47,6 +48,9 @@ test-all.bin:
 test-hello.bin:
 	$(BUILD)
 
+test-pthread-attr-setaffinity-np.bin:
+	$(BUILD) -Werror -lpthread
+
 test-stackprotector-all.bin:
 	$(BUILD) -Werror -fstack-protector-all
 
diff --git a/tools/perf/config/feature-checks/test-all.c b/tools/perf/config/feature-checks/test-all.c
index 652e0098eba6..6d4d09323922 100644
--- a/tools/perf/config/feature-checks/test-all.c
+++ b/tools/perf/config/feature-checks/test-all.c
@@ -97,6 +97,10 @@
 # include "test-zlib.c"
 #undef main
 
+#define main main_test_pthread_attr_setaffinity_np
+# include "test-pthread_attr_setaffinity_np.c"
+#undef main
+
 int main(int argc, char *argv[])
 {
 	main_test_libpython();
@@ -121,6 +125,7 @@ int main(int argc, char *argv[])
 	main_test_libdw_dwarf_unwind();
 	main_test_sync_compare_and_swap(argc, argv);
 	main_test_zlib();
+	main_test_pthread_attr_setaffinity_np();
 
 	return 0;
 }
diff --git a/tools/perf/config/feature-checks/test-pthread-attr-setaffinity-np.c b/tools/perf/config/feature-checks/test-pthread-attr-setaffinity-np.c
new file mode 100644
index 000000000000..0a0d3ecb4e8a
--- /dev/null
+++ b/tools/perf/config/feature-checks/test-pthread-attr-setaffinity-np.c
@@ -0,0 +1,14 @@
+#include <stdint.h>
+#include <pthread.h>
+
+int main(void)
+{
+	int ret = 0;
+	pthread_attr_t thread_attr;
+
+	pthread_attr_init(&thread_attr);
+	/* don't care abt exact args, just the API itself in libpthread */
+	ret = pthread_attr_setaffinity_np(&thread_attr, 0, NULL);
+
+	return ret;
+}
-- 
1.9.1

[PATCH v3 5/5] perf tools: [uclibc] provide stub for pthread_attr_setaffinity_np

[Vineet Gupta]

uClibc Linuxthreads.old doesnt support pthread_attr_setaffinity_np()
call

   ----------------->8-----------------------
  CC       bench/futex-hash.o
  CC       bench/futex-wake.o
bench/futex-hash.c: In function 'bench_futex_hash':
bench/futex-hash.c:161:3: error: implicit declaration of function
'pthread_attr_setaffinity_np' [-Werror=implicit-function-declaration]
   ret = pthread_attr_setaffinity_np(&thread_attr, sizeof(cpu_set_t),
&cpu);
   ^
bench/futex-hash.c:161:3: error: nested extern declaration of
'pthread_attr_setaffinity_np' [-Werror=nested-externs]
   ----------------->8-----------------------

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
 tools/perf/bench/futex.h                                   | 13 +++++++++++++
 tools/perf/config/Makefile                                 |  6 ++++++
 tools/perf/config/feature-checks/Makefile                  |  4 ++++
 tools/perf/config/feature-checks/test-all.c                |  5 +++++
 .../feature-checks/test-pthread-attr-setaffinity-np.c      | 14 ++++++++++++++
 5 files changed, 42 insertions(+)
 create mode 100644 tools/perf/config/feature-checks/test-pthread-attr-setaffinity-np.c

diff --git a/tools/perf/bench/futex.h b/tools/perf/bench/futex.h
index 71f2844cf97f..7ed22ff1e1ac 100644
--- a/tools/perf/bench/futex.h
+++ b/tools/perf/bench/futex.h
@@ -68,4 +68,17 @@ futex_cmp_requeue(u_int32_t *uaddr, u_int32_t val, u_int32_t *uaddr2, int nr_wak
 		 val, opflags);
 }
 
+#ifndef HAVE_PTHREAD_ATTR_SETAFFINITY_NP
+#include <pthread.h>
+static inline int pthread_attr_setaffinity_np(pthread_attr_t *attr,
+					      size_t cpusetsize,
+					      cpu_set_t *cpuset)
+{
+	attr = attr;
+	cpusetsize = cpusetsize;
+	cpuset = cpuset;
+	return 0;
+}
+#endif
+
 #endif /* _FUTEX_H */
diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
index 5d4b039fe1ed..6b59662136fa 100644
--- a/tools/perf/config/Makefile
+++ b/tools/perf/config/Makefile
@@ -198,6 +198,7 @@ CORE_FEATURE_TESTS =			\
 	libpython-version		\
 	libslang			\
 	libunwind			\
+	pthread-attr-setaffinity-np	\
 	stackprotector-all		\
 	timerfd				\
 	libdw-dwarf-unwind		\
@@ -226,6 +227,7 @@ VF_FEATURE_TESTS =			\
 	libelf-getphdrnum		\
 	libelf-mmap			\
 	libpython-version		\
+	pthread-attr-setaffinity-np	\
 	stackprotector-all		\
 	timerfd				\
 	libunwind-debug-frame		\
@@ -301,6 +303,10 @@ ifeq ($(feature-sync-compare-and-swap), 1)
   CFLAGS += -DHAVE_SYNC_COMPARE_AND_SWAP_SUPPORT
 endif
 
+ifeq ($(feature-pthread-attr-setaffinity-np), 1)
+  CFLAGS += -DHAVE_PTHREAD_ATTR_SETAFFINITY_NP
+endif
+
 ifndef NO_BIONIC
   $(call feature_check,bionic)
   ifeq ($(feature-bionic), 1)
diff --git a/tools/perf/config/feature-checks/Makefile b/tools/perf/config/feature-checks/Makefile
index 53f19b5dbc37..42ac05aaf8ac 100644
--- a/tools/perf/config/feature-checks/Makefile
+++ b/tools/perf/config/feature-checks/Makefile
@@ -25,6 +25,7 @@ FILES=					\
 	test-libslang.bin		\
 	test-libunwind.bin		\
 	test-libunwind-debug-frame.bin	\
+	test-pthread-attr-setaffinity-np.bin	\
 	test-stackprotector-all.bin	\
 	test-timerfd.bin		\
 	test-libdw-dwarf-unwind.bin	\
@@ -47,6 +48,9 @@ test-all.bin:
 test-hello.bin:
 	$(BUILD)
 
+test-pthread-attr-setaffinity-np.bin:
+	$(BUILD) -Werror -lpthread
+
 test-stackprotector-all.bin:
 	$(BUILD) -Werror -fstack-protector-all
 
diff --git a/tools/perf/config/feature-checks/test-all.c b/tools/perf/config/feature-checks/test-all.c
index 652e0098eba6..6d4d09323922 100644
--- a/tools/perf/config/feature-checks/test-all.c
+++ b/tools/perf/config/feature-checks/test-all.c
@@ -97,6 +97,10 @@
 # include "test-zlib.c"
 #undef main
 
+#define main main_test_pthread_attr_setaffinity_np
+# include "test-pthread_attr_setaffinity_np.c"
+#undef main
+
 int main(int argc, char *argv[])
 {
 	main_test_libpython();
@@ -121,6 +125,7 @@ int main(int argc, char *argv[])
 	main_test_libdw_dwarf_unwind();
 	main_test_sync_compare_and_swap(argc, argv);
 	main_test_zlib();
+	main_test_pthread_attr_setaffinity_np();
 
 	return 0;
 }
diff --git a/tools/perf/config/feature-checks/test-pthread-attr-setaffinity-np.c b/tools/perf/config/feature-checks/test-pthread-attr-setaffinity-np.c
new file mode 100644
index 000000000000..0a0d3ecb4e8a
--- /dev/null
+++ b/tools/perf/config/feature-checks/test-pthread-attr-setaffinity-np.c
@@ -0,0 +1,14 @@
+#include <stdint.h>
+#include <pthread.h>
+
+int main(void)
+{
+	int ret = 0;
+	pthread_attr_t thread_attr;
+
+	pthread_attr_init(&thread_attr);
+	/* don't care abt exact args, just the API itself in libpthread */
+	ret = pthread_attr_setaffinity_np(&thread_attr, 0, NULL);
+
+	return ret;
+}
-- 
1.9.1

Re: [PATCH v3 0/5] Perf tool fixes for ARC + uClibc

[Jiri Olsa]

On Tue, Jan 13, 2015 at 07:13:19PM +0530, Vineet Gupta wrote:
> Hi,
> 
> This series based off linux-next of 20150105 allows us to build/use perf
> for ARC with uClibc based userland.
> 
> v3: Changes since v2 [2]
> * 1/5	: Ack from Jiri
> * 2/5	: no changes
> * 3/5	: sys/syscall.h included	  [Jiri]
> * 4/5	: no changes
> * 5/5	: -lpthread added to link target  [Jiri]
> * {1,5} : Changelog updated so scissor lines don't start at column 1

Acked-by: Jiri Olsa <jolsa@kernel.org>

thanks,
jirka

Re: [PATCH v3 0/5] Perf tool fixes for ARC + uClibc

[Arnaldo Carvalho de Melo]

Em Wed, Jan 14, 2015 at 01:00:00PM +0100, Jiri Olsa escreveu:
> On Tue, Jan 13, 2015 at 07:13:19PM +0530, Vineet Gupta wrote:
> > Hi,
> > 
> > This series based off linux-next of 20150105 allows us to build/use perf
> > for ARC with uClibc based userland.
> > 
> > v3: Changes since v2 [2]
> > * 1/5	: Ack from Jiri
> > * 2/5	: no changes
> > * 3/5	: sys/syscall.h included	  [Jiri]
> > * 4/5	: no changes
> > * 5/5	: -lpthread added to link target  [Jiri]
> > * {1,5} : Changelog updated so scissor lines don't start at column 1
> 
> Acked-by: Jiri Olsa <jolsa@kernel.org>

Most are already in my perf/urgent branch.

- Arnaldo

[tip:perf/urgent] perf tools: Elide strlcpy warning with uclibc

[tip-bot for Vineet Gupta]

Commit-ID:  a83d869f300bf91df07443b5272db7a5a8eb18b7
Gitweb:     http://git.kernel.org/tip/a83d869f300bf91df07443b5272db7a5a8eb18b7
Author:     Vineet Gupta <Vineet.Gupta1@synopsys.com>
AuthorDate: Tue, 13 Jan 2015 19:13:21 +0530
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Fri, 16 Jan 2015 17:49:29 -0300

perf tools: Elide strlcpy warning with uclibc

   ----------------->8------------------
  CC       bench/sched-pipe.o
In file included from builtin-annotate.c:13:0:
util/cache.h:76:15: warning: redundant redeclaration of 'strlcpy'
[-Wredundant-decls]
 extern size_t strlcpy(char *dest, const char *src, size_t size);
               ^
In file included from util/util.h:55:0,
                 from builtin.h:4,
                 from builtin-annotate.c:8:
~/vineetg/arc/gnu/INSTALL_1412-arc-2014.12-rc1/arc-snps-linux-uclibc/sysroot/usr/include/string.h:396:15:
note: previous declaration of 'strlcpy' was here
 extern size_t strlcpy(char *__restrict dst, const char *__restrict src,
   ----------------->8------------------

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Alexey Brodkin <Alexey.Brodkin@synopsys.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1421156604-30603-3-git-send-email-vgupta@synopsys.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/cache.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/perf/util/cache.h b/tools/perf/util/cache.h
index 5cf9e1b..d04d770 100644
--- a/tools/perf/util/cache.h
+++ b/tools/perf/util/cache.h
@@ -71,7 +71,9 @@ extern char *perf_path(const char *fmt, ...) __attribute__((format (printf, 1, 2
 extern char *perf_pathdup(const char *fmt, ...)
 	__attribute__((format (printf, 1, 2)));
 
+#ifndef __UCLIBC__
 /* Matches the libc/libbsd function attribute so we declare this unconditionally: */
 extern size_t strlcpy(char *dest, const char *src, size_t size);
+#endif
 
 #endif /* __PERF_CACHE_H */

[tip:perf/urgent] perf tools: Avoid build splat for syscall numbers with uclibc

[tip-bot for Vineet Gupta]

Commit-ID:  ea1fe3a88763d4dfef7e2529ba606f96e8e6b271
Gitweb:     http://git.kernel.org/tip/ea1fe3a88763d4dfef7e2529ba606f96e8e6b271
Author:     Vineet Gupta <Vineet.Gupta1@synopsys.com>
AuthorDate: Tue, 13 Jan 2015 19:13:22 +0530
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Fri, 16 Jan 2015 17:49:29 -0300

perf tools: Avoid build splat for syscall numbers with uclibc

This is due to duplicated unistd inclusion (via uClibc headers + kernel headers)
Also seen on ARM uClibc based tools

   ------- ARC build ---------->8-------------

  CC       util/evlist.o
In file included from
~/arc/k.org/arch/arc/include/uapi/asm/unistd.h:25:0,
                 from util/../perf-sys.h:10,
                 from util/../perf.h:15,
                 from util/event.h:7,
                 from util/event.c:3:
~/arc/k.org/include/uapi/asm-generic/unistd.h:906:0:
warning: "__NR_fcntl64" redefined [enabled by default]
 #define __NR_fcntl64 __NR3264_fcntl
 ^
In file included from
~/arc/gnu/INSTALL_1412-arc-2014.12-rc1/arc-snps-linux-uclibc/sysroot/usr/include/sys/syscall.h:24:0,
                 from util/../perf-sys.h:6,
   ----------------->8-------------------

   ------- ARM build ---------->8-------------

  CC FPIC  plugin_scsi.o
In file included from util/../perf-sys.h:9:0,
                 from util/../perf.h:15,
                 from util/cache.h:7,
                 from perf.c:12:
~/arc/k.org/arch/arm/include/uapi/asm/unistd.h:28:0:
warning: "__NR_restart_syscall" redefined [enabled by default]
In file included from
~/buildroot/host/usr/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/sys/syscall.h:25:0,
                 from util/../perf-sys.h:6,
                 from util/../perf.h:15,
                 from util/cache.h:7,
                 from perf.c:12:
~/buildroot/host/usr/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/include/bits/sysnum.h:17:0:
note: this is the location of the previous definition
   ----------------->8-------------------

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Alexey Brodkin <Alexey.Brodkin@synopsys.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1421156604-30603-4-git-send-email-vgupta@synopsys.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/bench/sched-pipe.c | 2 +-
 tools/perf/builtin-top.c      | 1 -
 tools/perf/perf-sys.h         | 1 -
 3 files changed, 1 insertion(+), 3 deletions(-)

diff --git a/tools/perf/bench/sched-pipe.c b/tools/perf/bench/sched-pipe.c
index 07a8d76..005cc28 100644
--- a/tools/perf/bench/sched-pipe.c
+++ b/tools/perf/bench/sched-pipe.c
@@ -19,12 +19,12 @@
 #include <stdlib.h>
 #include <signal.h>
 #include <sys/wait.h>
-#include <linux/unistd.h>
 #include <string.h>
 #include <errno.h>
 #include <assert.h>
 #include <sys/time.h>
 #include <sys/types.h>
+#include <sys/syscall.h>
 
 #include <pthread.h>
 
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 961cea1..616f0fc 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -66,7 +66,6 @@
 #include <sys/utsname.h>
 #include <sys/mman.h>
 
-#include <linux/unistd.h>
 #include <linux/types.h>
 
 static volatile int done;
diff --git a/tools/perf/perf-sys.h b/tools/perf/perf-sys.h
index a3b13d7..6ef6816 100644
--- a/tools/perf/perf-sys.h
+++ b/tools/perf/perf-sys.h
@@ -6,7 +6,6 @@
 #include <sys/syscall.h>
 #include <linux/types.h>
 #include <linux/perf_event.h>
-#include <asm/unistd.h>
 
 #if defined(__i386__)
 #define mb()		asm volatile("lock; addl $0,0(%%esp)" ::: "memory")

Re: [PATCH v3 0/5] Perf tool fixes for ARC + uClibc

[Vineet Gupta]

Hi Arnaldo,

On Wednesday 14 January 2015 07:29 PM, Arnaldo Carvalho de Melo wrote:
> Em Wed, Jan 14, 2015 at 01:00:00PM +0100, Jiri Olsa escreveu:
>> > On Tue, Jan 13, 2015 at 07:13:19PM +0530, Vineet Gupta wrote:
>>> > > Hi,
>>> > > 
>>> > > This series based off linux-next of 20150105 allows us to build/use perf
>>> > > for ARC with uClibc based userland.
>>> > > 
>>> > > v3: Changes since v2 [2]
>>> > > * 1/5	: Ack from Jiri
>>> > > * 2/5	: no changes
>>> > > * 3/5	: sys/syscall.h included	  [Jiri]
>>> > > * 4/5	: no changes
>>> > > * 5/5	: -lpthread added to link target  [Jiri]
>>> > > * {1,5} : Changelog updated so scissor lines don't start at column 1
>> > 
>> > Acked-by: Jiri Olsa <jolsa@kernel.org>
> Most are already in my perf/urgent branch.
> 
> - Arnaldo

Are you planning to add {4,5}/5 for next window or did u drop/miss them ?

Thx,
-Vineet

Re: [PATCH v3 0/5] Perf tool fixes for ARC + uClibc

[Vineet Gupta]

Hi Arnaldo,

On Wednesday 14 January 2015 07:29 PM, Arnaldo Carvalho de Melo wrote:
> Em Wed, Jan 14, 2015 at 01:00:00PM +0100, Jiri Olsa escreveu:
>> > On Tue, Jan 13, 2015 at 07:13:19PM +0530, Vineet Gupta wrote:
>>> > > Hi,
>>> > > 
>>> > > This series based off linux-next of 20150105 allows us to build/use perf
>>> > > for ARC with uClibc based userland.
>>> > > 
>>> > > v3: Changes since v2 [2]
>>> > > * 1/5	: Ack from Jiri
>>> > > * 2/5	: no changes
>>> > > * 3/5	: sys/syscall.h included	  [Jiri]
>>> > > * 4/5	: no changes
>>> > > * 5/5	: -lpthread added to link target  [Jiri]
>>> > > * {1,5} : Changelog updated so scissor lines don't start at column 1
>> > 
>> > Acked-by: Jiri Olsa <jolsa@kernel.org>
> Most are already in my perf/urgent branch.
> 
> - Arnaldo

Are you planning to add {4,5}/5 for next window or did u drop/miss them ?

Thx,
-Vineet

Re: [PATCH v3 0/5] Perf tool fixes for ARC + uClibc

[Arnaldo Carvalho de Melo]

Em Mon, Jan 19, 2015 at 10:05:08AM +0530, Vineet Gupta escreveu:
> Hi Arnaldo,
> 
> On Wednesday 14 January 2015 07:29 PM, Arnaldo Carvalho de Melo wrote:
> > Em Wed, Jan 14, 2015 at 01:00:00PM +0100, Jiri Olsa escreveu:
> >> > On Tue, Jan 13, 2015 at 07:13:19PM +0530, Vineet Gupta wrote:
> >>> > > Hi,
> >>> > > 
> >>> > > This series based off linux-next of 20150105 allows us to build/use perf
> >>> > > for ARC with uClibc based userland.
> >>> > > 
> >>> > > v3: Changes since v2 [2]
> >>> > > * 1/5	: Ack from Jiri
> >>> > > * 2/5	: no changes
> >>> > > * 3/5	: sys/syscall.h included	  [Jiri]
> >>> > > * 4/5	: no changes
> >>> > > * 5/5	: -lpthread added to link target  [Jiri]
> >>> > > * {1,5} : Changelog updated so scissor lines don't start at column 1

> >> > Acked-by: Jiri Olsa <jolsa@kernel.org>
> > Most are already in my perf/urgent branch.

> Are you planning to add {4,5}/5 for next window or did u drop/miss them ?

I will, IIRC those were not that trivial, so could wait, I'll make sure
I review them and merge for perf/core if I find no issues.

- Arnaldo

Re: [PATCH v3 0/5] Perf tool fixes for ARC + uClibc

[Vineet Gupta]

Hi Arnaldo,

On Monday 19 January 2015 07:28 PM, Arnaldo Carvalho de Melo wrote:
>>>>> Acked-by: Jiri Olsa <jolsa@kernel.org>
>>> > > Most are already in my perf/urgent branch.
>> > Are you planning to add {4,5}/5 for next window or did u drop/miss them ?
> I will, IIRC those were not that trivial, so could wait, I'll make sure
> I review them and merge for perf/core if I find no issues.

Sorry for annoying pestering on this. I don't see the patches in ur perf/core yet
and given that we are so close to next window, I fear that we will miss them if we
don't add them soon.

We need them to be able to use perf on ARC - fixing build issue (5/5) as well as
run time issue (4/5)

Thx,
-Vineet

Re: [PATCH v3 0/5] Perf tool fixes for ARC + uClibc

[Vineet Gupta]

Hi Arnaldo,

On Monday 19 January 2015 07:28 PM, Arnaldo Carvalho de Melo wrote:
>>>>> Acked-by: Jiri Olsa <jolsa@kernel.org>
>>> > > Most are already in my perf/urgent branch.
>> > Are you planning to add {4,5}/5 for next window or did u drop/miss them ?
> I will, IIRC those were not that trivial, so could wait, I'll make sure
> I review them and merge for perf/core if I find no issues.

Sorry for annoying pestering on this. I don't see the patches in ur perf/core yet
and given that we are so close to next window, I fear that we will miss them if we
don't add them soon.

We need them to be able to use perf on ARC - fixing build issue (5/5) as well as
run time issue (4/5)

Thx,
-Vineet

Re: [PATCH v3 0/5] Perf tool fixes for ARC + uClibc

[Arnaldo Carvalho de Melo]

Em Tue, Jan 27, 2015 at 03:59:59PM +0530, Vineet Gupta escreveu:
> Hi Arnaldo,
> 
> On Monday 19 January 2015 07:28 PM, Arnaldo Carvalho de Melo wrote:
> >>>>> Acked-by: Jiri Olsa <jolsa@kernel.org>
> >>> > > Most are already in my perf/urgent branch.
> >> > Are you planning to add {4,5}/5 for next window or did u drop/miss them ?
> > I will, IIRC those were not that trivial, so could wait, I'll make sure
> > I review them and merge for perf/core if I find no issues.
> 
> Sorry for annoying pestering on this. I don't see the patches in ur perf/core yet
> and given that we are so close to next window, I fear that we will miss them if we
> don't add them soon.
> 
> We need them to be able to use perf on ARC - fixing build issue (5/5) as well as
> run time issue (4/5)

Applied the remaining ones to my perf/core branch, will be on my next
pull req to Ingo.

- Arnaldo

[tip:perf/core] perf evsel: Don't rely on malloc working for sz 0

[tip-bot for Vineet Gupta]

Commit-ID:  8d9cbd8f870e1aab00fb0f8a465887877a1d6f82
Gitweb:     http://git.kernel.org/tip/8d9cbd8f870e1aab00fb0f8a465887877a1d6f82
Author:     Vineet Gupta <Vineet.Gupta1@synopsys.com>
AuthorDate: Tue, 13 Jan 2015 19:13:23 +0530
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Wed, 28 Jan 2015 12:43:32 -0300

perf evsel: Don't rely on malloc working for sz 0

When running perf on ARC (uClibc based userspace), ran into this issue
   ------------->8----------------
	[ARCLinux]$ ./perf record ls
	bin             etc             perf            sys
	debug           init            perf.data       tmp
	[ perf record: Woken up 1 times to write data ]
	[ perf record: Captured and wrote 0.001 MB perf.data (~24 samples) ]

	[ARCLinux]$ ./perf report
	incompatible file format (rerun with -v to learn more)
   ------------->8----------------

The problem happens in the following call stack when zalloc is called
with size zero

glibc default / uClibc with MALLOC_GLIBC_COMPAT are OK, but not if that
config option is not enabled.

  cmd_report
     perf_session__new
	perf_session__open
	    perf_session__read_header
		read_attr(fd, header, &f_attr)
		nr_ids = f_attr.ids.size / sizeof(u64); <-- 0
		perf_evsel__alloc_id(vsel, 1, nr_ids)
			zalloc(ncpus * nthreads * sizeof(u64)) <-- 0

header.c: read_attr()

(gdb) p *f_attr
$17 = {
  attr = {
    type = 0,
    size = 96,
    config = 0,
    {
      sample_period = 4000,
      sample_freq = 4000
    },
...
  ids = {
    offset = 104,
    size = 0      <------
  }
}

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Suggested-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexey Brodkin <Alexey.Brodkin@synopsys.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1421156604-30603-5-git-send-email-vgupta@synopsys.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/evsel.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 1e90c85..1d826d6 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -797,6 +797,9 @@ int perf_evsel__enable(struct perf_evsel *evsel, int ncpus, int nthreads)
 
 int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads)
 {
+	if (ncpus == 0 || nthreads == 0)
+		return 0;
+
 	if (evsel->system_wide)
 		nthreads = 1;
 

[tip:perf/core] perf tools: Provide stub for missing pthread_attr_setaffinity_np

[tip-bot for Vineet Gupta]

Commit-ID:  459a3df76c99124fd222586be7f10f862547e7a9
Gitweb:     http://git.kernel.org/tip/459a3df76c99124fd222586be7f10f862547e7a9
Author:     Vineet Gupta <Vineet.Gupta1@synopsys.com>
AuthorDate: Tue, 13 Jan 2015 19:13:24 +0530
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Wed, 28 Jan 2015 12:43:32 -0300

perf tools: Provide stub for missing pthread_attr_setaffinity_np

uClibc Linuxthreads.old doesn't support the pthread_attr_setaffinity_np()
functioo:

   ----------------->8-----------------------
  CC       bench/futex-hash.o
  CC       bench/futex-wake.o
bench/futex-hash.c: In function 'bench_futex_hash':
bench/futex-hash.c:161:3: error: implicit declaration of function
'pthread_attr_setaffinity_np' [-Werror=implicit-function-declaration]
   ret = pthread_attr_setaffinity_np(&thread_attr, sizeof(cpu_set_t),
&cpu);
   ^
bench/futex-hash.c:161:3: error: nested extern declaration of
'pthread_attr_setaffinity_np' [-Werror=nested-externs]
   ----------------->8-----------------------

So introduce a test to check that and if not available provide a stub.

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexey Brodkin <Alexey.Brodkin@synopsys.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1421156604-30603-6-git-send-email-vgupta@synopsys.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/bench/futex.h                                   | 13 +++++++++++++
 tools/perf/config/Makefile                                 |  6 ++++++
 tools/perf/config/feature-checks/Makefile                  |  4 ++++
 tools/perf/config/feature-checks/test-all.c                |  5 +++++
 .../feature-checks/test-pthread-attr-setaffinity-np.c      | 14 ++++++++++++++
 5 files changed, 42 insertions(+)

diff --git a/tools/perf/bench/futex.h b/tools/perf/bench/futex.h
index 71f2844..7ed22ff 100644
--- a/tools/perf/bench/futex.h
+++ b/tools/perf/bench/futex.h
@@ -68,4 +68,17 @@ futex_cmp_requeue(u_int32_t *uaddr, u_int32_t val, u_int32_t *uaddr2, int nr_wak
 		 val, opflags);
 }
 
+#ifndef HAVE_PTHREAD_ATTR_SETAFFINITY_NP
+#include <pthread.h>
+static inline int pthread_attr_setaffinity_np(pthread_attr_t *attr,
+					      size_t cpusetsize,
+					      cpu_set_t *cpuset)
+{
+	attr = attr;
+	cpusetsize = cpusetsize;
+	cpuset = cpuset;
+	return 0;
+}
+#endif
+
 #endif /* _FUTEX_H */
diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
index 648e31f..cc22408 100644
--- a/tools/perf/config/Makefile
+++ b/tools/perf/config/Makefile
@@ -198,6 +198,7 @@ CORE_FEATURE_TESTS =			\
 	libpython-version		\
 	libslang			\
 	libunwind			\
+	pthread-attr-setaffinity-np	\
 	stackprotector-all		\
 	timerfd				\
 	libdw-dwarf-unwind		\
@@ -226,6 +227,7 @@ VF_FEATURE_TESTS =			\
 	libelf-getphdrnum		\
 	libelf-mmap			\
 	libpython-version		\
+	pthread-attr-setaffinity-np	\
 	stackprotector-all		\
 	timerfd				\
 	libunwind-debug-frame		\
@@ -301,6 +303,10 @@ ifeq ($(feature-sync-compare-and-swap), 1)
   CFLAGS += -DHAVE_SYNC_COMPARE_AND_SWAP_SUPPORT
 endif
 
+ifeq ($(feature-pthread-attr-setaffinity-np), 1)
+  CFLAGS += -DHAVE_PTHREAD_ATTR_SETAFFINITY_NP
+endif
+
 ifndef NO_BIONIC
   $(call feature_check,bionic)
   ifeq ($(feature-bionic), 1)
diff --git a/tools/perf/config/feature-checks/Makefile b/tools/perf/config/feature-checks/Makefile
index 53f19b5..42ac05a 100644
--- a/tools/perf/config/feature-checks/Makefile
+++ b/tools/perf/config/feature-checks/Makefile
@@ -25,6 +25,7 @@ FILES=					\
 	test-libslang.bin		\
 	test-libunwind.bin		\
 	test-libunwind-debug-frame.bin	\
+	test-pthread-attr-setaffinity-np.bin	\
 	test-stackprotector-all.bin	\
 	test-timerfd.bin		\
 	test-libdw-dwarf-unwind.bin	\
@@ -47,6 +48,9 @@ test-all.bin:
 test-hello.bin:
 	$(BUILD)
 
+test-pthread-attr-setaffinity-np.bin:
+	$(BUILD) -Werror -lpthread
+
 test-stackprotector-all.bin:
 	$(BUILD) -Werror -fstack-protector-all
 
diff --git a/tools/perf/config/feature-checks/test-all.c b/tools/perf/config/feature-checks/test-all.c
index 652e009..6d4d093 100644
--- a/tools/perf/config/feature-checks/test-all.c
+++ b/tools/perf/config/feature-checks/test-all.c
@@ -97,6 +97,10 @@
 # include "test-zlib.c"
 #undef main
 
+#define main main_test_pthread_attr_setaffinity_np
+# include "test-pthread_attr_setaffinity_np.c"
+#undef main
+
 int main(int argc, char *argv[])
 {
 	main_test_libpython();
@@ -121,6 +125,7 @@ int main(int argc, char *argv[])
 	main_test_libdw_dwarf_unwind();
 	main_test_sync_compare_and_swap(argc, argv);
 	main_test_zlib();
+	main_test_pthread_attr_setaffinity_np();
 
 	return 0;
 }
diff --git a/tools/perf/config/feature-checks/test-pthread-attr-setaffinity-np.c b/tools/perf/config/feature-checks/test-pthread-attr-setaffinity-np.c
new file mode 100644
index 0000000..0a0d3ec
--- /dev/null
+++ b/tools/perf/config/feature-checks/test-pthread-attr-setaffinity-np.c
@@ -0,0 +1,14 @@
+#include <stdint.h>
+#include <pthread.h>
+
+int main(void)
+{
+	int ret = 0;
+	pthread_attr_t thread_attr;
+
+	pthread_attr_init(&thread_attr);
+	/* don't care abt exact args, just the API itself in libpthread */
+	ret = pthread_attr_setaffinity_np(&thread_attr, 0, NULL);
+
+	return ret;
+}