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  1. 31 5月, 2012 9 次提交
    • N
      perf evlist: Pass third argument to ioctl explicitly · 55da8005
      由 Namhyung Kim 提交于 
      The ioctl on perf event fd wants 3 arguments but we only passed 2. As
the only user of the functions is perf record and it calls them for
every event (regardless of group setting), just pass 0 for now.
Signed-off-by: NNamhyung Kim <namhyung.kim@lge.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1338443506-25009-3-git-send-email-namhyung.kim@lge.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      55da8005
    • N
      perf tools: Update ioctl documentation for PERF_IOC_FLAG_GROUP · a59e64a1
      由 Namhyung Kim 提交于 
      The ioctl interface of perf event fd receives 3 arguments to control
event group behavior but it lacked documentation.
Signed-off-by: NNamhyung Kim <namhyung.kim@lge.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1338443506-25009-2-git-send-email-namhyung.kim@lge.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      a59e64a1
    • A
      perf tools: Make --version show kernel version instead of pull req tag · aa5cdd30
      由 Arnaldo Carvalho de Melo 提交于 
      Before:

  $ perf --version
  perf version perf.urgent.for.mingo.5.g37da28

After:

  $ perf --version
  perf version 3.4.8941.g37da28.dirty

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-vc9b4e6023iegz9kabr3yvyv@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      aa5cdd30
    • N
      perf tools: Check if callchain is corrupted · 114067b6
      由 Namhyung Kim 提交于 
      We faced segmentation fault on perf top -G at very high sampling rate
due to a corrupted callchain. While the root cause was not revealed (I
failed to figure it out), this patch tries to protect us from the
segfault on such cases.
Reported-by: NArnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: NNamhyung Kim <namhyung.kim@lge.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Sunjin Yang <fan4326@gmail.com>
Link: http://lkml.kernel.org/r/1338443007-24857-2-git-send-email-namhyung.kim@lge.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      114067b6
    • N
      perf callchain: Make callchain cursors TLS · 47260645
      由 Namhyung Kim 提交于 
      perf top -G has a race on callchain cursor between main thread and
display thread. Since the callchain cursors are used locally make them
thread-local data would solve the problem.
Signed-off-by: NNamhyung Kim <namhyung.kim@lge.com>
Reported-by: NSunjin Yang <fan4326@gmail.com>
Suggested-by: NArnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Sunjin Yang <fan4326@gmail.com>
Link: http://lkml.kernel.org/r/1338443007-24857-1-git-send-email-namhyung.kim@lge.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      47260645
    • A
      perf tools: Fix pager on minimal-install embedded systems · ea1b3eba
      由 Avik Sil 提交于 
      Some Distributions may lack "less" package being included by default,
e.g., Linaro nano rootfs. In those cases use the portable "pager"
command instead of "less".
Signed-off-by: NAvik Sil <avik.sil@linaro.org>
Acked-by: NIngo Molnar <mingo@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1338287725-26382-1-git-send-email-avik.sil@linaro.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      ea1b3eba
    • A
      perf tools: Fix make tarballs · f1439c31
      由 Arnaldo Carvalho de Melo 提交于 
      The patch series that introduced the top level tools/ makefile and the
libtraceevent broke this feature where files needed to build in a
detached tarball were not included in the MANIFEST file and thus not
included in the tarball.

Fix it by adding the relevant files to the MANIFEST.

Cc: Borislav Petkov <borislav.petkov@amd.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/n/tip-z3mjj74927xvqwhlmu18kj80@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      f1439c31
    • D
      perf script: Fix regression in callchain dso name · 52deff71
      由 David Ahern 提交于 
      $ perf script -i /tmp/perf.data
...
gcc 13623 544315.062858: context-switches:
    ffffffff815f65c9 __schedule ([kernel.kallsyms])
    ffffffff81087cea __cond_resched ([kernel.kallsyms])
    ffffffff815f6b92 _cond_resched ([kernel.kallsyms])
    ffffffff815fb87a do_page_fault ([kernel.kallsyms])
    ffffffff815f8465 page_fault ([kernel.kallsyms])
        2b7a71ea0303 _dl_lookup_symbol_x ([kernel.kallsyms])
        2b7a71ea1eb5 _dl_relocate_object ([kernel.kallsyms])
        2b7a71e99b2e dl_main ([kernel.kallsyms])
        2b7a71eab7f4 _dl_sysdep_start ([kernel.kallsyms])

All DSO's in a callchain are printed as [kernel.kallsyms].

git bisect chased it to:

547a92e0 is the first bad commit
commit 547a92e0
Author: Akihiro Nagai <akihiro.nagai.hw@hitachi.com>
Date:   Mon Jan 30 13:42:57 2012 +0900

    perf script: Unify the expressions indicating "unknown"

    The perf script command uses various expressions to indicate "unknown".

    It is unfriendly for user scripts to parse it. So, this patch unifies
    the expressions to "[unknown]".

Looks like a copy-paste in that the other references use al.map but this one
should be node->map.

With this patch you get:

$ perf script -i /tmp/perf.data
...
gcc 13623 544315.062858: context-switches:
    ffffffff815f65c9 __schedule ([kernel.kallsyms])
    ffffffff81087cea __cond_resched ([kernel.kallsyms])
    ffffffff815f6b92 _cond_resched ([kernel.kallsyms])
    ffffffff815fb87a do_page_fault ([kernel.kallsyms])
    ffffffff815f8465 page_fault ([kernel.kallsyms])
        2b7a71ea0303 _dl_lookup_symbol_x (/lib64/ld-2.14.90.so)
        2b7a71ea1eb5 _dl_relocate_object (/lib64/ld-2.14.90.so)
        2b7a71e99b2e dl_main (/lib64/ld-2.14.90.so)
        2b7a71eab7f4 _dl_sysdep_start (/lib64/ld-2.14.90.so)
Signed-off-by: NDavid Ahern <dsahern@gmail.com>
Cc: Akihiro Nagai <akihiro.nagai.hw@hitachi.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1338353906-60706-1-git-send-email-dsahern@gmail.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      52deff71
    • A
      perf stat: Initialize default events wrt exclude_{guest,host} · 79695e1b
      由 Arnaldo Carvalho de Melo 提交于 
      When no event is specified the tools use perf_evlist__add_default(), that will
call event_attr_init to initialize the KVM exclusion bits.

When the change was made to the tools so that by default guest samples would be
excluded, the changes were made just to the parsing routines and to
perf_evlist__add_default(), not to perf_evlist__add_attrs, that is used so far
just by perf stat to add multiple events, according to the level of detail
specified.

Recently the tools were changed to reconstruct the event name from all the
details in perf_event_attr, not just from .type and .config, but taking into
account all the feature bits (.exclude_{guest,host,user,kernel,etc},
.precise_ip, etc).

That is when we noticed that the default for perf stat wasn't the one for the
rest of the tools, i.e. the .exclude_guest bit wasn't being set.

I.e. the default, that doesn't call event_attr_init was showing the :HG
modifier:

  $ perf stat usleep 1

   Performance counter stats for 'usleep 1':

            0.942119 task-clock                #    0.454 CPUs utilized
                   1 context-switches          #    0.001 M/sec
                   0 CPU-migrations            #    0.000 K/sec
                 126 page-faults               #    0.134 M/sec
             693,193 cycles:HG                 #    0.736 GHz                     [40.11%]
             407,461 stalled-cycles-frontend:HG #   58.78% frontend cycles idle    [72.29%]
             365,403 stalled-cycles-backend:HG #   52.71% backend  cycles idle
             465,982 instructions:HG           #    0.67  insns per cycle
                                               #    0.87  stalled cycles per insn
              89,760 branches:HG               #   95.275 M/sec
               6,178 branch-misses:HG          #    6.88% of all branches

         0.002077228 seconds time elapsed

While if one explicitely specifies the same events, which will make the parsing code
to be called and thus event_attr_init is called:

  $ perf stat -e task-clock,context-switches,migrations,page-faults,cycles,stalled-cycles-frontend,stalled-cycles-backend,instructions,branches,branch-misses usleep 1

   Performance counter stats for 'usleep 1':

            1.040349 task-clock                #    0.500 CPUs utilized
                   2 context-switches          #    0.002 M/sec
                   0 CPU-migrations            #    0.000 K/sec
                 127 page-faults               #    0.122 M/sec
             587,966 cycles                    #    0.565 GHz                     [13.18%]
             459,167 stalled-cycles-frontend   #   78.09% frontend cycles idle
             390,249 stalled-cycles-backend    #   66.37% backend  cycles idle
             504,006 instructions              #    0.86  insns per cycle
                                               #    0.91  stalled cycles per insn
              96,455 branches                  #   92.714 M/sec
               6,522 branch-misses             #    6.76% of all branches         [96.12%]

         0.002078681 seconds time elapsed

Fix it by introducing a perf_evlist__add_default_attrs method that will call
evlist_attr_init in all the perf_event_attr entries before adding the events.
Reported-by: NIngo Molnar <mingo@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-4eysr236r0pgiyum9epwxw7s@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      79695e1b
  3. 30 5月, 2012 31 次提交