Messages in this thread Patch in this message | | | From | Namhyung Kim <> | Subject | [PATCH 3/8] perf top: Add error message for EMFILE | Date | Sun, 8 Jan 2012 02:25:27 +0900 |
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When a user tries to open so many events, perf_event_open syscall may fail with EMFILE. Provide advise for that case.
Signed-off-by: Namhyung Kim <namhyung@gmail.com> --- tools/perf/builtin-top.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index 4f81eeb99875..ad18dd37e87d 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -889,6 +889,10 @@ try_again: ui__warning("The %s event is not supported.\n", event_name(counter)); goto out_err; + } else if (err == EMFILE) { + ui__warning("Too many events are opened.\n" + "Try again after reducing the number of events\n"); + goto out_err; } ui__warning("The sys_perf_event_open() syscall " -- 1.7.6
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