| From | Alexander Shishkin <> | Subject | [PATCH v0 25/71] perf evsel: Add 'no_aux_samples' option | Date | Wed, 11 Dec 2013 14:36:37 +0200 |
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From: Adrian Hunter <adrian.hunter@intel.com>
Add an option to prevent additional samples being added to a selected event by perf_evsel__config().
This is needed when using the sched_switch tracepoint to follow object code execution. Since sched_switch will be used only for switch information, additional sampling is wasteful.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> --- tools/perf/util/evsel.c | 6 +++--- tools/perf/util/evsel.h | 1 + 2 files changed, 4 insertions(+), 3 deletions(-)
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 7b510fd..dbf737c 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -596,7 +596,7 @@ void perf_evsel__config(struct perf_evsel *evsel, attr->mmap_data = track; } - if (opts->call_graph) { + if (opts->call_graph && !evsel->no_aux_samples) { perf_evsel__set_sample_bit(evsel, CALLCHAIN); if (opts->call_graph == CALLCHAIN_DWARF) { @@ -619,7 +619,7 @@ void perf_evsel__config(struct perf_evsel *evsel, target__has_cpu(&opts->target) || per_cpu)) perf_evsel__set_sample_bit(evsel, TIME); - if (opts->raw_samples) { + if (opts->raw_samples && !evsel->no_aux_samples) { perf_evsel__set_sample_bit(evsel, TIME); perf_evsel__set_sample_bit(evsel, RAW); perf_evsel__set_sample_bit(evsel, CPU); @@ -632,7 +632,7 @@ void perf_evsel__config(struct perf_evsel *evsel, attr->watermark = 0; attr->wakeup_events = 1; } - if (opts->branch_stack) { + if (opts->branch_stack && !evsel->no_aux_samples) { perf_evsel__set_sample_bit(evsel, BRANCH_STACK); attr->branch_sample_type = opts->branch_stack; } diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index 8120eeb..af38e2c 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -83,6 +83,7 @@ struct perf_evsel { int is_pos; bool supported; bool needs_swap; + bool no_aux_samples; /* parse modifier helper */ int exclude_GH; int nr_members; -- 1.8.5.1
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