perf trace: No need to enable evsels for workload started from perf

As they will have perf_event_attr.enable_on_exec set, starting as soon
as we exec() the workload.

Cc: Adrian Hunter <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Don Zickus <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 7e935f1083ec64b8ea23b0d870a1241c759b724c..66300aea08b0f1ed06794dca1948439797e1338e 100644 (file)
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -2109,10 +2109,10 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
        if (err < 0)
                goto out_error_mmap;
 
-       perf_evlist__enable(evlist);
-
        if (forks)
                perf_evlist__start_workload(evlist);
+       else
+               perf_evlist__enable(evlist);
 
        trace->multiple_threads = evlist->threads->map[0] == -1 || evlist->threads->nr > 1;
 again: