linux.git/tools/perf/util/session.c, branch v4.20

perf tools: Remove perf_tool from event_op3

2018-09-19T13:25:10+00:00

Now that we keep a perf_tool pointer inside perf_session, there's no need
to have a perf_tool argument in the event_op3 callback. Remove it.

Signed-off-by: Jiri Olsa 
Cc: Alexander Shishkin 
Cc: Alexey Budankov 
Cc: Andi Kleen 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/20180913125450.21342-3-jolsa@kernel.org
[ Fix the builtin-inject.c build for !HAVE_AUXTRACE_SUPPORT ]
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Remove perf_tool from event_op2

2018-09-19T13:25:10+00:00

Now that we keep a perf_tool pointer inside perf_session, there's no
need to have a perf_tool argument in the event_op2 callback. Remove it.

Signed-off-by: Jiri Olsa 
Cc: Alexander Shishkin 
Cc: Alexey Budankov 
Cc: Andi Kleen 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/20180913125450.21342-2-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf evsel: Add has_callchain() helper to make code more compact/clear

2018-06-05T13:09:54+00:00

Its common to have the (evsel->attr.sample_type & PERF_SAMPLE_CALLCHAIN),
so add an evsel__has_callchain(evsel) helper.

This will actually get more uses as we check that instead of
symbol_conf.use_callchain in places where that produces the same result
but makes this decision to be more fine grained, per evsel.

Cc: Adrian Hunter 
Cc: David Ahern 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Wang Nan 
Link: https://lkml.kernel.org/n/tip-145340oytbthatpfeaq1do18@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf symbols: Unify symbol maps

2018-04-27T13:47:06+00:00

Remove the split of symbol tables for data (MAP__VARIABLE) and for
functions (MAP__FUNCTION), its unneeded and there were various places
doing two lookups to find a symbol, so simplify this.

We still will consider only the symbols that matched the filters in
place, i.e. see the (elf_(sec,sym)|symbol_type)__filter() routines in
the patch, just so that we consider only the same symbols as before,
to reduce the possibility of regressions.

All the tests on 50-something build environments, in varios versions
of lots of distros and cross build environments were performed without
build regressions, as usual with all pull requests the other tests were
also performed: 'perf test' and 'make -C tools/perf build-test'.

Also this was done at a great granularity so that regressions can be
bisected more easily.

Cc: Adrian Hunter 
Cc: David Ahern 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Wang Nan 
Link: https://lkml.kernel.org/n/tip-hiq0fy2rsleupnqqwuojo1ne@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf report: Remove duplicated 'samples' in lost samples warning

2018-04-05T17:34:09+00:00

The following message, emitted when samples are lost due to system
overload, had one 'samples' too many, ditch it:

   Processed 25333 samples and lost 20.88% samples!

Cc: Adrian Hunter 
Cc: David Ahern 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Wang Nan 
Cc: Kan Liang 
Link: https://lkml.kernel.org/n/tip-oev1469y02hmfere6r2kkxp6@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf report: Fix regression when decoding intel_pt traces

2018-01-23T12:51:36+00:00

Commit (93d10af26bb7 perf tools: Optimize sample parsing for ordered
events) breaks intelPT trace decoding by invariably returning an error
if the event type isn't a PERF_SAMPLE_TIME.

With this patch the timestamp is initialised and processing is allowed
to continue if the error returned by function
perf_evlist__parse_sample_timestamp() is not a fault.

Signed-off-by: Mathieu Poirier 
Acked-by: Adrian Hunter 
Acked-by: Jiri Olsa 
Cc: Alexander Shishkin 
Cc: Peter Zijlstra 
Fixes: 93d10af26bb7 ("perf tools: Optimize sample parsing for ordered events")
Link: http://lkml.kernel.org/r/1515616312-27645-1-git-send-email-mathieu.poirier@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Make the tool's warning messages optional

2018-01-10T15:00:55+00:00

I want to display the pure events status coming in the next patch and
the tool's warnings are superfluous in the output. Making it optional,
enabled by default.

Signed-off-by: Jiri Olsa 
Cc: Alexander Shishkin 
Cc: Andi Kleen 
Cc: David Ahern 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/20180107160356.28203-11-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf report: Fix -D output for user metadata events

2017-11-29T21:18:02+00:00

The PERF_RECORD_USER_ events are synthesized by the tool to assist in
processing the PERF_RECORD_ ones generated by the kernel, the printing
of that information doesn't come with a perf_sample structure, so, when
dumping the event fields using 'perf report -D' there were columns that
end up not being printed.

To tidy up a bit this, fake a perf_sample structure with zeroes to have
the missing columns printed and avoid the occasional surprise with that.

Before:

0 0x45b8 [0x68]: PERF_RECORD_MMAP -1/0: [0xffffffffc12ec000(0x4000) @ 0]: x /lib/modules/4.14.0+/kernel/fs/nls/nls_utf8.ko
0x4620 [0x28]: PERF_RECORD_THREAD_MAP nr: 1 thread: 27820
0x4648 [0x18]: PERF_RECORD_CPU_MAP: 0-3
0 0x4660 [0x28]: PERF_RECORD_COMM: perf:27820/27820
0x4a58 [0x8]: PERF_RECORD_FINISHED_ROUND
447723433020976 0x4688 [0x28]: PERF_RECORD_SAMPLE(IP, 0x4001): 27820/27820: 0xffffffff8f1b6d7a period: 1 addr: 0

After:

  $ perf report -D | grep PERF_RECORD_ | head
  0 0xe8 [0x20]: PERF_RECORD_TIME_CONV: unhandled!
  0 0x108 [0x28]: PERF_RECORD_THREAD_MAP nr: 1 thread: 32555
  0 0x130 [0x18]: PERF_RECORD_CPU_MAP: 0-3
  0 0x148 [0x28]: PERF_RECORD_COMM: perf:32555/32555
  0 0x4e8 [0x8]: PERF_RECORD_FINISHED_ROUND
  448743409421205 0x170 [0x28]: PERF_RECORD_COMM exec: sleep:32555/32555
  448743409431883 0x198 [0x68]: PERF_RECORD_MMAP2 32555/32555: [0x55e11d75a000(0x208000) @ 0 fd:00 3147174 2566255743]: r-xp /usr/bin/sleep
  448743409443873 0x200 [0x70]: PERF_RECORD_MMAP2 32555/32555: [0x7f0ced316000(0x229000) @ 0 fd:00 3151761 2566238119]: r-xp /usr/lib64/ld-2.25.so
  448743409454790 0x270 [0x60]: PERF_RECORD_MMAP2 32555/32555: [0x7ffe84f6d000(0x2000) @ 0 00:00 0 0]: r-xp [vdso]
  448743409479500 0x2d0 [0x28]: PERF_RECORD_SAMPLE(IP, 0x4002): 32555/32555: 0xffffffff8f84c7e7 period: 1 addr: 0
  $

Cc: Adrian Hunter 
Cc: Andi Kleen 
Cc: David Ahern 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Wang Nan 
Cc: Thomas Gleixner 
Fixes: 9aefcab0de47 ("perf session: Consolidate the dump code")
Link: https://lkml.kernel.org/n/tip-todcu15x0cwgppkh1gi6uhru@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Optimize sample parsing for ordered events

2017-11-17T15:16:04+00:00

Currently when using ordered events we parse the sample twice (the
perf_evlist__parse_sample function). Once before we queue the sample for
sorting:

  perf_session__process_event
    perf_evlist__parse_sample(sample)
    perf_session__queue_event(sample.time)

And then when we deliver the sorted sample:

  ordered_events__deliver_event
    perf_evlist__parse_sample
    perf_session__deliver_event

We can skip the initial full sample parsing by using
perf_evlist__parse_sample_timestamp function, which got introduced
earlier. The new path looks like:

  perf_session__process_event
    perf_evlist__parse_sample_timestamp
    perf_session__queue_event

  ordered_events__deliver_event
    perf_session__deliver_event
      perf_evlist__parse_sample

It saves some instructions and is slightly faster:

Before:
 Performance counter stats for './perf.old report --stdio' (5 runs):

    64,396,007,225      cycles:u                                                      ( +-  0.97% )
   105,882,112,735      instructions:u            #    1.64  insn per cycle           ( +-  0.00% )

      21.618103465 seconds time elapsed                                          ( +-  1.12% )

After:
 Performance counter stats for './perf report --stdio' (5 runs):

    60,567,807,182      cycles:u                                                      ( +-  0.40% )
   104,853,333,514      instructions:u            #    1.73  insn per cycle           ( +-  0.00% )

      20.168895243 seconds time elapsed                                          ( +-  0.32% )

Signed-off-by: Jiri Olsa 
Cc: Adrian Hunter 
Cc: David Ahern 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Wang Nan 
Link: http://lkml.kernel.org/n/tip-cjp2tuk0qkjs9dxzlpmm34ua@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf ordered_events: Pass timestamp arg in perf_session__queue_event

2017-11-17T15:14:09+00:00

There's no need to pass whole sample data, because it's only timestamp
that is used.

Signed-off-by: Jiri Olsa 
Cc: Adrian Hunter 
Cc: David Ahern 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Wang Nan 
Link: http://lkml.kernel.org/n/tip-xd1hpoze3kgb1rb639o3vehb@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo