Re: [GIT PULL 00/13] perf/core improvements and fixes

[Stephane Eranian]

On Tue, Sep 9, 2014 at 9:14 AM, Adrian Hunter <adrian.hunter@xxxxxxxxx> wrote:
> On 09/09/2014 07:59 AM, Ingo Molnar wrote:
>>
>> * Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> wrote:
>>
>>> Hi Ingo,
>>>
>>>      Please consider pulling,
>>>
>>> - Arnaldo
>>>
>>> The following changes since commit 39b5a56ec0be5effe9b7d0f18cb27724bf2e5d47:
>>>
>>>   Merge branch 'rfc/perf' into perf/core, because it's ready for inclusion (2014-08-24 22:35:42 +0200)
>>>
>>> are available in the git repository at:
>>>
>>>
>>>   git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git tags/perf-core-for-mingo
>>>
>>> for you to fetch changes up to fa3480cb0a96c8af9ded1a8c836c91bd5704bda1:
>>>
>>>   perf tools: Add perf_pmu__scan_file() (2014-09-08 17:16:06 -0300)
>>>
>>> ----------------------------------------------------------------
>>> perf/core improvements and fixes:
>>>
>>> User visible:
>>>
>>> o Add +field argument support for --sort option (Jiri Olsa)
>>>
>>> Infrastructure:
>>>
>>> o More intel PT prep work, from Adrian Hunter, including:
>>>
>>>   - Let a user specify a PMU event without any config terms
>>>   - Add perf-with-kcore script
>>>   - Build programs to copy 32-bit compatibility VDSOs
>>>   - Add support for 32-bit compatibility VDSOs
>>>   - Let default config be defined for a PMU
>>>   - Add perf_pmu__scan_file()
>>>
>>> o Add feature checks to .gitignore (Alexander Shishkin)
>>>
>>> o "perf kvm stat report" improvements by Alexander Yarygin:
>>>   o  Save pid string in opts.target.pid
>>>   o  Enable the target.system_wide flag
>>>   o  Unify the title bar output
>>>
>>> o Fix build issue on powerpc when DWARF support is disabled (Anton Blanchard)
>>>
>>> o Allow to specify lib compile variable for spec usage (Jiri Olsa)
>>>
>>> Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
>>>
>>> ----------------------------------------------------------------
>>> Adrian Hunter (6):
>>>       perf tools: Let a user specify a PMU event without any config terms
>>>       perf tools: Add perf-with-kcore script
>>>       perf tools: Build programs to copy 32-bit compatibility VDSOs
>>>       perf tools: Add support for 32-bit compatibility VDSOs
>>>       perf tools: Let default config be defined for a PMU
>>>       perf tools: Add perf_pmu__scan_file()
>>>
>>> Alexander Shishkin (1):
>>>       perf tools: Add feature checks to .gitignore
>>>
>>> Alexander Yarygin (3):
>>>       perf kvm stat report: Save pid string in opts.target.pid
>>>       perf kvm stat report: Enable the target.system_wide flag
>>>       perf kvm stat report: Unify the title bar output
>>>
>>> Anton Blanchard (1):
>>>       perf tools powerpc: Fix build issue when DWARF support is disabled
>>>
>>> Jiri Olsa (2):
>>>       perf tools: Add +field argument support for --sort option
>>>       perf tools: Allow to specify lib compile variable for spec usage
>>>
>>>  tools/perf/.gitignore            |   2 +
>>>  tools/perf/Makefile.perf         |  42 ++++++-
>>>  tools/perf/arch/powerpc/Makefile |   2 +-
>>>  tools/perf/builtin-kvm.c         |  23 ++--
>>>  tools/perf/config/Makefile       |  33 ++++-
>>>  tools/perf/config/Makefile.arch  |   8 ++
>>>  tools/perf/perf-read-vdso.c      |  59 +++++++++
>>>  tools/perf/perf-with-kcore.sh    | 259 +++++++++++++++++++++++++++++++++++++++
>>>  tools/perf/tests/pmu.c           |   2 +-
>>>  tools/perf/util/kvm-stat.h       |   1 -
>>>  tools/perf/util/parse-events.c   |  13 +-
>>>  tools/perf/util/parse-events.y   |  10 ++
>>>  tools/perf/util/pmu.c            |  79 +++++++++---
>>>  tools/perf/util/pmu.h            |  12 +-
>>>  tools/perf/util/sort.c           |  37 +++++-
>>>  tools/perf/util/vdso.c           | 170 ++++++++++++++++++++++++-
>>>  tools/perf/util/vdso.h           |   4 +-
>>>  17 files changed, 712 insertions(+), 44 deletions(-)
>>>  create mode 100644 tools/perf/perf-read-vdso.c
>>>  create mode 100644 tools/perf/perf-with-kcore.sh
>>
>> Hm, so I'm getting this error, when trying to profile a 32-bit
>> ELF binary on a 64-bit kernel, on a testbox:
>>
>>  $ perf record ~/hackbench  10
>>  Time: 0.115
>>  [ perf record: Woken up 1 times to write data ]
>>  [ perf record: Captured and wrote 0.373 MB perf.data (~16279 samples) ]
>>  sh: perf-read-vdso32: command not found
>
> Presumably perf-read-vdso32 is not in the PATH.  Did you 'make install'?
>
Why are we relying on an external command now in perf record?

>>
>> comet:~/tip> file ~/hackbench
>> /home/mingo/hackbench: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.2.5, not stripped
>>
>> 64-bit executables work fine:
>>
>>  $ perf record perf bench sched pipe
>>  # Running 'sched/pipe' benchmark:
>>  # Executed 1000000 pipe operations between two processes
>>
>>       Total time: 13.374 [sec]
>>
>>        13.374352 usecs/op
>>            74769 ops/sec
>>  [ perf record: Woken up 14 times to write data ]
>>  [ perf record: Captured and wrote 3.602 MB perf.data (~157354 samples) ]
>>
>> The kernel is an older one:
>>
>>  $ uname -a
>>  Linux comet 3.14.17-100.fc19.x86_64 #1 SMP Thu Aug 14 17:17:26
>>  UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
>>
>> Thanks,
>>
>>       Ingo
>>
>>
>
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