diff options
| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2011-01-11 13:58:54 -0500 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2011-01-11 14:31:26 -0500 |
| commit | 4ad9f594d7199c99f6b1b3ef88c64bd5920a4592 (patch) | |
| tree | 29786c4cc76908f6313f1d9fc55088fde9e61597 /tools/perf/builtin-top.c | |
| parent | cc841580aa58ad7498b23e282859d07f8b721e24 (diff) | |
Revert "perf tools: Emit clearer message for sys_perf_event_open ENOENT return"
This reverts commit aa7bc7ef73efc46d7c3a0e185eefaf85744aec98.
It removed the fallback from hardware profiling to software profiling.
.e.g., in a VM with no PMU.
Reported-by: David Ahern <daahern@cisco.com>
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, 0 insertions, 2 deletions
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index 568b1950e632..05344c6210ac 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c | |||
| @@ -1247,8 +1247,6 @@ try_again: | |||
| 1247 | die("Permission error - are you root?\n" | 1247 | die("Permission error - are you root?\n" |
| 1248 | "\t Consider tweaking" | 1248 | "\t Consider tweaking" |
| 1249 | " /proc/sys/kernel/perf_event_paranoid.\n"); | 1249 | " /proc/sys/kernel/perf_event_paranoid.\n"); |
| 1250 | if (err == ENOENT) | ||
| 1251 | die("%s event is not supported. ", event_name(evsel)); | ||
| 1252 | /* | 1250 | /* |
| 1253 | * If it's cycles then fall back to hrtimer | 1251 | * If it's cycles then fall back to hrtimer |
| 1254 | * based cpu-clock-tick sw counter, which | 1252 | * based cpu-clock-tick sw counter, which |