Commit c63ca0c01d73563d4e2ab174bb3dd1e5efb907e6
Committed by
Ingo Molnar
Ingo Molnar
1 parent
947b4ad1d1
Exists in
master
and in
20 other branches
perf stat: Tell user about unsupported events in the list
Similar to perf-record, tell user about unsupported events
that will not be counted if invoked in verbose mode.
e.g.,
$ perf stat -e dTLB-prefetch-misses -v -- sleep 1
dTLB-prefetch-misses event is not supported by the kernel.
dTLB-prefetch-misses: 0 0 0
Performance counter stats for 'sleep 1':
<not counted> dTLB-prefetch-misses
1.001884783 seconds time elapsed
Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/1304114655-10600-1-git-send-email-dsahern@gmail.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Showing 1 changed file with 5 additions and 1 deletions Side-by-side Diff
tools/perf/builtin-stat.c
| ... | ... | @@ -377,8 +377,12 @@ |
| 377 | 377 | |
| 378 | 378 | list_for_each_entry(counter, &evsel_list->entries, node) { |
| 379 | 379 | if (create_perf_stat_counter(counter) < 0) { |
| 380 | - if (errno == EINVAL || errno == ENOSYS || errno == ENOENT) | |
| 380 | + if (errno == EINVAL || errno == ENOSYS || errno == ENOENT) { | |
| 381 | + if (verbose) | |
| 382 | + ui__warning("%s event is not supported by the kernel.\n", | |
| 383 | + event_name(counter)); | |
| 381 | 384 | continue; |
| 385 | + } | |
| 382 | 386 | |
| 383 | 387 | if (errno == EPERM || errno == EACCES) { |
| 384 | 388 | error("You may not have permission to collect %sstats.\n" |