perf events: Default to using event__process_lost

Tool developers have to fill in a 'perf_event_ops' method table to
specify how to handle each event, so far the ones that were not
explicitely especified would get a stub that would just discard the
event.

Change that so that tool developers can get the lost event details and
the total number of such events at the end of 'perf report -D' output.

Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
CC: Thomas Gleixner <tglx@linutronix.de>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index fa9d652c2dc3c07182028d4a196293333be75d78..3d56047394938c436714d79c912d2e91f3846b93 100644 (file)
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -262,7 +262,7 @@ static void perf_event_ops__fill_defaults(struct perf_event_ops *handler)
        if (handler->exit == NULL)
                handler->exit = process_event_stub;
        if (handler->lost == NULL)
-               handler->lost = process_event_stub;
+               handler->lost = event__process_lost;
        if (handler->read == NULL)
                handler->read = process_event_stub;
        if (handler->throttle == NULL)