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Commit 2afd2bcf authored by Adrian Hunter's avatar Adrian Hunter Committed by Arnaldo Carvalho de Melo
Browse files

perf evsel: Add 'immediate' option 



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 precedes the start of other tracing.

Signed-off-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1405332185-4050-34-git-send-email-adrian.hunter@intel.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 6ff1ce76

tools/perf/util/evsel.c

+5 −0
Original line number Diff line number Diff line
@@ -681,6 +681,11 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts) 
	if (target__none(&opts->target) && perf_evsel__is_group_leader(evsel) &&

		!opts->initial_delay)

		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)

tools/perf/util/evsel.h

+1 −0
Original line number Diff line number Diff line
@@ -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;