Commit-ID: cfd70a26aadf0a9af80bbce035e5760736727a94
Gitweb: http://git.kernel.org/tip/cfd70a26aadf0a9af80bbce035e5760736727a94
Author: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
AuthorDate: Sat, 21 Feb 2015 10:09:55 -0800
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Sun, 22 Feb 2015 22:14:25 -0300
perf evlist: Introduce set_filter_pid method
To filter out events for a certain pid, for instance, when tracing
system wide, so that the tracer itself doesn't creates an event loop.
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Don Zickus <dzickus@xxxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Mike Galbraith <efault@xxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Link: http://lkml.kernel.org/n/tip-byoia9dzu4gmkdv87etnd9zf@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/util/evlist.c | 13 +++++++++++++
tools/perf/util/evlist.h | 1 +
2 files changed, 14 insertions(+)
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index a8b2c57..39302a4 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -1085,6 +1085,19 @@ int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter)
return err;
}
+int perf_evlist__set_filter_pid(struct perf_evlist *evlist, pid_t pid)
+{
+ char *filter;
+ int ret;
+
+ if (asprintf(&filter, "common_pid != %d", pid) < 0)
+ return -1;
+
+ ret = perf_evlist__set_filter(evlist, filter);
+ free(filter);
+ return ret;
+}
+
bool perf_evlist__valid_sample_type(struct perf_evlist *evlist)
{
struct perf_evsel *pos;
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index c94a9e0..715fa3a 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -77,6 +77,7 @@ int perf_evlist__add_newtp(struct perf_evlist *evlist,
const char *sys, const char *name, void *handler);
int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter);
+int perf_evlist__set_filter_pid(struct perf_evlist *evlist, pid_t pid);
struct perf_evsel *
perf_evlist__find_tracepoint_by_id(struct perf_evlist *evlist, int id);
--
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