perf session: Remove sample_type_check from event_ops

This is really something tools need to do before asking for the
events to be processed, leaving perf_session__process_events to
do just that, process events.

Also add a msg parameter to perf_session__has_traces() so that
the right message can be printed, fixing a regression added by
me in the previous cset (right timechart message) and also
fixing 'perf kmem', that was not asking if 'perf kmem record'
was ran.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1261957026-15580-6-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 4 insertions, 3 deletions

diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index d65098c42990..e862e71f4e68 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -1657,17 +1657,18 @@ static struct perf_event_ops event_ops = {
         .process_sample_event   = process_sample_event,
         .process_comm_event     = event__process_comm,
         .process_lost_event     = process_lost_event,
-        .sample_type_check      = perf_session__has_traces,
 };
 
 static int read_events(void)
 {
-        int err;
+        int err = -EINVAL;
         struct perf_session *session = perf_session__new(input_name, O_RDONLY, 0);
         if (session == NULL)
                 return -ENOMEM;
 
-        err = perf_session__process_events(session, &event_ops);
+        if (perf_session__has_traces(session, "record -R"))
+                err = perf_session__process_events(session, &event_ops);
+
         perf_session__delete(session);
         return err;
 }