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@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1325957132-10600-3-git-send-email-namhyung@gmail.com Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
parent
c30ab8aa08
commit
cdce445906
@ -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 "
|
||||
|
Loading…
Reference in New Issue
Block a user