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| author |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2011-01-10 13:36:24 -0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2011-01-10 13:36:24 -0200 |
| commit | aa7bc7ef73efc46d7c3a0e185eefaf85744aec98 (patch) | |
| tree | 638bfb5be868a450fd1802e672aa9e7ab9bb76c8 /tools/perf/builtin-top.c | |
| parent | perf stat: better error message for unsupported events (diff) | |
| download | linux-dev-aa7bc7ef73efc46d7c3a0e185eefaf85744aec98.tar.xz linux-dev-aa7bc7ef73efc46d7c3a0e185eefaf85744aec98.zip | |
perf tools: Emit clearer message for sys_perf_event_open ENOENT return
Improve sys_perf_event_open ENOENT return handling in top and record, just
like 5a3446b does for stat.
Cc: David Ahern <daahern@cisco.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-top.c')
| -rw-r--r-- | tools/perf/builtin-top.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index 1e67ab9c7ebc..6ce4042421bd 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -1247,6 +1247,8 @@ try_again: die("Permission error - are you root?\n" "\t Consider tweaking" " /proc/sys/kernel/perf_event_paranoid.\n"); + if (err == ENOENT) + die("%s event is not supported. ", event_name(evsel)); /* * If it's cycles then fall back to hrtimer * based cpu-clock-tick sw counter, which |