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perf auxtrace: Add CPU filter support

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Decoding auxtrace data can take a long time. To avoid decoding
unnecessarily, filter auxtrace data that is collected per-cpu before it is
decoded.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/1495786658-18063-38-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2017-05-26 11:17:38 +03:00 committed by Arnaldo Carvalho de Melo
parent 38b65b0891
commit 644e0840ad
4 changed files with 14 additions and 0 deletions
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1
tools/perf/builtin-report.c
View File

@ -557,6 +557,7 @@ static int __cmd_report(struct report *rep)
ui__error("failed to set cpu bitmap\n");
return ret;
}
session->itrace_synth_opts->cpu_bitmap = rep->cpu_bitmap;
}
if (rep->show_threads) {

1
tools/perf/builtin-script.c
View File

@ -2992,6 +2992,7 @@ int cmd_script(int argc, const char **argv)
err = perf_session__cpu_bitmap(session, cpu_list, cpu_bitmap);
if (err < 0)
goto out_delete;
itrace_synth_opts.cpu_bitmap = cpu_bitmap;
}
if (!no_callchain)

10
tools/perf/util/auxtrace.c
View File

@ -322,6 +322,13 @@ static int auxtrace_queues__add_event_buffer(struct auxtrace_queues *queues,
return auxtrace_queues__add_buffer(queues, idx, buffer);
}
static bool filter_cpu(struct perf_session *session, int cpu)
{
unsigned long *cpu_bitmap = session->itrace_synth_opts->cpu_bitmap;
return cpu_bitmap && cpu != -1 && !test_bit(cpu, cpu_bitmap);
}
int auxtrace_queues__add_event(struct auxtrace_queues *queues,
struct perf_session *session,
union perf_event *event, off_t data_offset,
@ -331,6 +338,9 @@ int auxtrace_queues__add_event(struct auxtrace_queues *queues,
unsigned int idx;
int err;
if (filter_cpu(session, event->auxtrace.cpu))
return 0;
buffer = zalloc(sizeof(struct auxtrace_buffer));
if (!buffer)
return -ENOMEM;

2
tools/perf/util/auxtrace.h
View File

@ -74,6 +74,7 @@ enum itrace_period_type {
* @period: 'instructions' events period
* @period_type: 'instructions' events period type
* @initial_skip: skip N events at the beginning.
* @cpu_bitmap: CPUs for which to synthesize events, or NULL for all
*/
struct itrace_synth_opts {
bool set;
@ -96,6 +97,7 @@ struct itrace_synth_opts {
unsigned long long period;
enum itrace_period_type period_type;
unsigned long initial_skip;
unsigned long *cpu_bitmap;
};
/**