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authorAdrian Hunter <adrian.hunter@intel.com>2014-07-14 13:02:57 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2014-07-16 17:57:37 -0300
commit2afd2bcfc3a026d6e4c2184bf41ccd74eb05758b (patch)
tree6bc8b7c959c016d9924d27aed48f05471e976e82 /tools/perf
parent6ff1ce763921f605aaf98c7a828b7df24d6923dc (diff)
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: Adrian 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: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
-rw-r--r--tools/perf/util/evsel.c5
-rw-r--r--tools/perf/util/evsel.h1
2 files changed, 6 insertions, 0 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 40626e5fc1c0..90f58cdd0fb0 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -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)
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index 8dfec05bcec2..d7f93ce0ebc1 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;