Commit a2ea67d7 authored by Stanislav Fomichev's avatar Stanislav Fomichev Committed by Arnaldo Carvalho de Melo
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perf trace: Add pagefault statistics 



'perf trace' can show summary of events using -S option. This commit
also reports number of major/minor pagefault events in this summary.

$ perf trace -s --pf all -- sleep 1

 Summary of events:

 sleep (18604), 275 events, 99.6%, 197 minfaults, 0.000 msec

   syscall            calls      min       avg       max      stddev
                               (msec)    (msec)    (msec)        (%)
   --------------- -------- --------- --------- ---------     ------
   read                   2     0.000     0.001     0.002    100.00%
   open                   3     0.004     0.005     0.007     21.13%
   close                  3     0.001     0.001     0.001      1.37%
   fstat                  3     0.001     0.002     0.002     10.66%
   mmap                   8     0.002     0.004     0.006     10.69%
   mprotect               4     0.003     0.005     0.008     24.68%
   munmap                 1     0.005     0.005     0.005      0.00%
   brk                    3     0.001     0.002     0.003     28.08%
   access                 3     0.002     0.003     0.005     24.48%
   nanosleep              1  1000.747  1000.747  1000.747      0.00%
   execve                 8     0.000     0.033     0.246     91.00%
   arch_prctl             1     0.001     0.001     0.001      0.00%

Signed-off-by: default avatarStanislav Fomichev <stfomichev@yandex-team.ru>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1404842716-19190-1-git-send-email-stfomichev@yandex-team.ru


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 071266bf

tools/perf/builtin-trace.c

+17 −0
Original line number Diff line number Diff line
@@ -1133,6 +1133,7 @@ struct thread_trace { 
	u64		  exit_time;

	bool		  entry_pending;

	unsigned long	  nr_events;

	unsigned long	  pfmaj, pfmin;

	char		  *entry_str;

	double		  runtime_ms;

	struct {
@@ -1804,8 +1805,20 @@ static int trace__pgfault(struct trace *trace, 
	u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;

	struct addr_location al;

	char map_type = 'd';

	struct thread_trace *ttrace;



	thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);

	ttrace = thread__trace(thread, trace->output);

	if (ttrace == NULL)

		return -1;



	if (evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)

		ttrace->pfmaj++;

	else

		ttrace->pfmin++;



	if (trace->summary_only)

		return 0;



	thread__find_addr_location(thread, trace->host, cpumode, MAP__FUNCTION,

			      sample->ip, &al);
@@ -2346,6 +2359,10 @@ static int trace__fprintf_one_thread(struct thread *thread, void *priv) 
	printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid);

	printed += fprintf(fp, "%lu events, ", ttrace->nr_events);

	printed += fprintf(fp, "%.1f%%", ratio);

	if (ttrace->pfmaj)

		printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj);

	if (ttrace->pfmin)

		printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin);

	printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms);

	printed += thread__dump_stats(ttrace, trace, fp);

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