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authorAdrian Hunter <adrian.hunter@intel.com>2013-11-01 17:51:29 +0400
committerArnaldo Carvalho de Melo <acme@redhat.com>2013-11-04 19:18:17 +0400
commitf852fd621ca19f557f2e3d05900366be7c7afb83 (patch)
tree23da3a0b5e20b418a2f549e9c0d7da1ea8481a6f /tools
parent4dfced359fbc719a35527416f1b4b3999647f68b (diff)
downloadlinux-f852fd621ca19f557f2e3d05900366be7c7afb83.tar.xz
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>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/util/evsel.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 3a334f001997..f0e65dec66a5 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -1051,6 +1051,8 @@ retry_open:
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;