Commit-ID: cdce445906852d90efdc773ca7ba460e6e41664d Gitweb: http://git.kernel.org/tip/cdce445906852d90efdc773ca7ba460e6e41664d Author: Namhyung Kim <namhyung@xxxxxxxxx> AuthorDate: Sun, 8 Jan 2012 02:25:27 +0900 Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> CommitDate: Sun, 8 Jan 2012 13:26:11 -0200 perf top: Add error message for EMFILE When a user tries to open so many events, perf_event_open syscall may fail with EMFILE. Provide advise for that case. Cc: Ingo Molnar <mingo@xxxxxxx> Cc: Paul Mackerras <paulus@xxxxxxxxx> Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> Link: http://lkml.kernel.org/r/1325957132-10600-3-git-send-email-namhyung@xxxxxxxxx Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxx> Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> --- 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 d89dec9..8f80df8 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -888,6 +888,10 @@ 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 " -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html