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Date: Fri, 1 Nov 2013 15:51:29 +0200 From: Adrian Hunter <adrian.hunter@...el.com> To: Arnaldo Carvalho de Melo <acme@...stprotocols.net> Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>, Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org, David Ahern <dsahern@...il.com>, Frederic Weisbecker <fweisbec@...il.com>, Jiri Olsa <jolsa@...hat.com>, Mike Galbraith <efault@....de>, Namhyung Kim <namhyung@...il.com>, Paul Mackerras <paulus@...ba.org>, Stephane Eranian <eranian@...gle.com> Subject: [PATCH V3 01/11] 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@...el.com> --- tools/perf/util/evsel.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index ec0cc1e..e09c7e6 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -1052,6 +1052,8 @@ 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; -- 1.7.11.7 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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