From: Adrian Hunter <adrian.hun...@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.hun...@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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