Commit f852fd62 authored Nov 01, 2013 by Adrian Hunter Committed by Arnaldo Carvalho de Melo Nov 04, 2013

perf evsel: Add a debug print if perf_event_open fails



There is a debug print (at verbose level 2) for each call to
perf_event_open.  Add another debug print if the call fails, and print
the error number.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1383313899-15987-2-git-send-email-adrian.hunter@intel.com


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

parent 4dfced35

tools/perf/util/evsel.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -1051,6 +1051,8 @@ static int __perf_evsel__open(struct perf_evsel evsel, struct cpu_map cpus,
		group_fd, flags);
		if (FD(evsel, cpu, thread) < 0) {
		err = -errno;
		pr_debug2("perf_event_open failed, error %d\n",
		err);
		goto try_fallback;
		}
		set_rlimit = NO_CHANGE;