| From | Adrian Hunter <> | Subject | [PATCH V3 01/11] perf evsel: Add a debug print if perf_event_open fails | Date | Fri, 1 Nov 2013 15:51:29 +0200 |
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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> --- 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
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