From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Ahern Subject: [PATCH] perf stat: tell user about unsupported events in the list Date: Fri, 29 Apr 2011 16:04:15 -0600 Message-ID: <1304114655-10600-1-git-send-email-dsahern@gmail.com> Return-path: Received: from mail-pv0-f174.google.com ([74.125.83.174]:41619 "EHLO mail-pv0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757844Ab1D2WEV (ORCPT ); Fri, 29 Apr 2011 18:04:21 -0400 Sender: linux-perf-users-owner@vger.kernel.org List-ID: To: linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Cc: acme@ghostprotocols.net, mingo@elte.hu, David Ahern 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': dTLB-prefetch-misses 1.001884783 seconds time elapsed Signed-off-by: David Ahern --- tools/perf/builtin-stat.c | 6 +++++- 1 files changed, 5 insertions(+), 1 deletions(-) diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index c8b535b..602c3c9 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -377,8 +377,12 @@ static int run_perf_stat(int argc __used, const char **argv) list_for_each_entry(counter, &evsel_list->entries, node) { if (create_perf_stat_counter(counter) < 0) { - if (errno == EINVAL || errno == ENOSYS || errno == ENOENT) + if (errno == EINVAL || errno == ENOSYS || errno == ENOENT) { + if (verbose) + ui__warning("%s event is not supported by the kernel.\n", + event_name(counter)); continue; + } if (errno == EPERM || errno == EACCES) { error("You may not have permission to collect %sstats.\n" -- 1.7.4.4