linux.git/tools/perf/util/header.c, branch v2.6.38

perf symbols: Avoid resolving [kernel.kallsyms] to real path for buildid cache

2011-03-09T16:44:10+00:00

kallsyms has a virtual file name [kernel.kallsyms].  Currently, it can't
be added to buildid cache successfully because the code
(build_id_cache__add_s) tries to resolve [kernel.kallsyms] to a real
absolute pathname and that fails.

Fixes it by not resolving it and just use the name [kernel.kallsyms].
So dir ~/.debug/[kernel.kallsyms] is created.

Original bug report at:
https://lkml.org/lkml/2011/3/1/524

Tested-by: Han Pingtian 
Cc: Han Pingtian 
Cc: Ingo Molnar 
Cc: Peter Zijlstra 
LKML-Reference: <1299165837-27817-1-git-send-email-ming.m.lin@intel.com>
Signed-off-by: Lin Ming 
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Fix 64 bit integer format strings

2011-01-23T01:41:57+00:00

Using %L[uxd] has issues in some architectures, like on ppc64.  Fix it
by making our 64 bit integers typedefs of stdint.h types and using
PRI[ux]64 like, for instance, git does.

Reported by Denis Kirjanov that provided a patch for one case, I went
and changed all cases.

Reported-by: Denis Kirjanov 
Tested-by: Denis Kirjanov 
LKML-Reference: <20110120093246.GA8031@hera.kernel.org>
Cc: Denis Kirjanov 
Cc: Frederic Weisbecker 
Cc: Ingo Molnar 
Cc: Mike Galbraith 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Cc: Pingtian Han 
Cc: Stephane Eranian 
Cc: Tom Zanussi 
Signed-off-by: Arnaldo Carvalho de Melo

Merge branch 'perf/test' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux-2.6 into perf/core

2011-01-04T07:10:28+00:00

Merge commit 'v2.6.37-rc8' into perf/core

2011-01-04T07:08:54+00:00

Merge reason: pick up latest -rc.

Signed-off-by: Ingo Molnar

perf util: Move do_read from session to util

2011-01-03T18:50:55+00:00

Not really something to be exported from session.c. Rename it to
'readn' as others did in the past.

Cc: Frederic Weisbecker 
Cc: Ingo Molnar 
Cc: Mike Galbraith 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Cc: Stephane Eranian 
Cc: Tom Zanussi 
LKML-Reference: 
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Introduce event selectors

2011-01-03T18:39:04+00:00

Out of ad-hoc code and global arrays with hard coded sizes.

This is the first step on having a library that will be first
used on regression tests in the 'perf test' tool.

[acme@felicio linux]$ size /tmp/perf.before
   text	   data	    bss	    dec	    hex	filename
1273776	  97384	5104416	6475576	 62cf38	/tmp/perf.before
[acme@felicio linux]$ size /tmp/perf.new
   text	   data	    bss	    dec	    hex	filename
1275422	  97416	1392416	2765254	 2a31c6	/tmp/perf.new

Cc: Frederic Weisbecker 
Cc: Ingo Molnar 
Cc: Mike Galbraith 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Cc: Stephane Eranian 
Cc: Tom Zanussi 
LKML-Reference: 
Signed-off-by: Arnaldo Carvalho de Melo

perf buildid-cache: Fix symbolic link handling

2010-12-16T11:41:45+00:00

This was broken since link(2) doesn't dereference symbolic
links. Instead 'filename' becomes a symbolic link to the same file
that 'name' refers to.

This had the bad effect to create dangling symlinks in the case that
even can't be removed with perf-buildid-cache(1).

LKML-Reference: 
Signed-off-by: Franck Bui-Huu 
Signed-off-by: Arnaldo Carvalho de Melo

Merge branch 'perf/urgent' into perf/core

2010-12-16T10:22:27+00:00

Merge reason: We want to apply a dependent patch.

Signed-off-by: Ingo Molnar

perf tools: Catch a few uncheck calloc/malloc's

2010-12-06T14:52:35+00:00

There were a few stray calloc()'s and malloc()'s which were not having
their return values checked for success.

As the calling code either already coped with failure or didn't actually
care we just return -ENOMEM at that point.

Cc: Ingo Molnar 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Signed-off-by: Chris Samuel 
LKML-Reference: <4CDDF95A.1050400@csamuel.org>
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Ask for ID PERF_SAMPLE_ info on all PERF_RECORD_ events

2010-12-05T01:08:40+00:00

So that we can use -T == --timestamp, asking for PERF_SAMPLE_TIME:

  $ perf record -aT
  $ perf report -D | grep PERF_RECORD_
  
   3   5951915425 0x47530 [0x58]: PERF_RECORD_SAMPLE(IP, 1): 16811/16811: 0xffffffff8138c1a2 period: 215979 cpu:3
   3   5952026879 0x47588 [0x90]: PERF_RECORD_SAMPLE(IP, 1): 16811/16811: 0xffffffff810cb480 period: 215979 cpu:3
   3   5952059959 0x47618 [0x38]: PERF_RECORD_FORK(6853:6853):(16811:16811)
   3   5952138878 0x47650 [0x78]: PERF_RECORD_SAMPLE(IP, 1): 16811/16811: 0xffffffff811bac35 period: 431478 cpu:3
   3   5952375068 0x476c8 [0x30]: PERF_RECORD_COMM: find:6853
   3   5952395923 0x476f8 [0x50]: PERF_RECORD_MMAP 6853/6853: [0x400000(0x25000) @ 0]: /usr/bin/find
   3   5952413756 0x47748 [0xa0]: PERF_RECORD_SAMPLE(IP, 1): 6853/6853: 0xffffffff810d080f period: 859332 cpu:3
   3   5952419837 0x477e8 [0x58]: PERF_RECORD_MMAP 6853/6853: [0x3f44600000(0x21d000) @ 0]: /lib64/ld-2.5.so
   3   5952437929 0x47840 [0x48]: PERF_RECORD_MMAP 6853/6853: [0x7fff7e1c9000(0x1000) @ 0x7fff7e1c9000]: [vdso]
   3   5952570127 0x47888 [0x58]: PERF_RECORD_MMAP 6853/6853: [0x3f46200000(0x218000) @ 0]: /lib64/libselinux.so.1
   3   5952623637 0x478e0 [0x58]: PERF_RECORD_MMAP 6853/6853: [0x3f44a00000(0x356000) @ 0]: /lib64/libc-2.5.so
   3   5952675720 0x47938 [0x58]: PERF_RECORD_MMAP 6853/6853: [0x3f44e00000(0x204000) @ 0]: /lib64/libdl-2.5.so
   3   5952710080 0x47990 [0x58]: PERF_RECORD_MMAP 6853/6853: [0x3f45a00000(0x246000) @ 0]: /lib64/libsepol.so.1
   3   5952847802 0x479e8 [0x58]: PERF_RECORD_SAMPLE(IP, 1): 6853/6853: 0xffffffff813897f0 period: 1142536 cpu:3
  

First column is the cpu and the second the timestamp.

That way we can investigate problems in the event stream.

If the new perf binary is run on an older kernel, it will disable this feature
automatically.

Tested-by: Thomas Gleixner 
Reviewed-by: Thomas Gleixner 
Acked-by: Ian Munsie 
Acked-by: Thomas Gleixner 
Cc: Frédéric Weisbecker 
Cc: Ian Munsie 
Cc: Mike Galbraith 
Cc: Peter Zijlstra 
Cc: Paul Mackerras 
Cc: Stephane Eranian 
LKML-Reference: <1291318772-30880-5-git-send-email-acme@infradead.org>
Signed-off-by: Arnaldo Carvalho de Melo