perf record: Don't exit in live mode when no tracepoints are enabled
With this I was able to actually test Tom Zanussi's two previous patches
in my usual perf testing ways, i.e. without any tracepoints activated.
Cc: Frédéric 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: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index e382d93..ac989e9 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -666,12 +666,15 @@
nr_counters,
process_synthesized_event,
session);
- if (err <= 0) {
- pr_err("Couldn't record tracing data.\n");
- return err;
- }
-
- advance_output(err);
+ /*
+ * FIXME err <= 0 here actually means that there were no tracepoints
+ * so its not really an error, just that we don't need to synthesize
+ * anything.
+ * We really have to return this more properly and also propagate
+ * errors that now are calling die()
+ */
+ if (err > 0)
+ advance_output(err);
}
machine = perf_session__find_host_machine(session);