| From | Alexander Shishkin <> | Subject | [PATCH v0 26/71] perf evsel: Add 'immediate' option | Date | Wed, 11 Dec 2013 14:36:38 +0200 |
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From: Adrian Hunter <adrian.hunter@intel.com>
Add an option to cause a selected event to be enabled immediately when configured by perf_evsel__config().
This is needed when using the sched_switch tracepoint to follow object code execution. By having sched_switch enabled immediately the first sched_switch event always precedes the start of other tracing.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> --- tools/perf/util/evsel.c | 5 +++++ tools/perf/util/evsel.h | 1 + 2 files changed, 6 insertions(+)
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index dbf737c..5fcd7cb 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -661,6 +661,11 @@ void perf_evsel__config(struct perf_evsel *evsel, */ if (target__none(&opts->target) && perf_evsel__is_group_leader(evsel)) attr->enable_on_exec = 1; + + if (evsel->immediate) { + attr->disabled = 0; + attr->enable_on_exec = 0; + } } int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads) diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index af38e2c..de1b36e 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -84,6 +84,7 @@ struct perf_evsel { bool supported; bool needs_swap; bool no_aux_samples; + bool immediate; /* parse modifier helper */ int exclude_GH; int nr_members; -- 1.8.5.1
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