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| author | Stephane Eranian <eranian@google.com> | 2012-09-20 18:19:45 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2012-09-20 14:44:17 -0300 |
| commit | 1863fbbb781b1129da0cfdad46ef875370a34117 (patch) | |
| tree | 5ba7b070ff5a21f8d4c2f0cea4c021a09c252ef8 /tools/perf/builtin-record.c | |
| parent | 8f28f19a87cb48d13570ba774a3e85776eb36bb4 (diff) | |
| download | linux-1863fbbb781b1129da0cfdad46ef875370a34117.tar.gz linux-1863fbbb781b1129da0cfdad46ef875370a34117.tar.bz2 linux-1863fbbb781b1129da0cfdad46ef875370a34117.zip | |
perf record: Print event causing perf_event_open() to fail
Got tired of not getting the event that caused the perf_event_open()
syscall to fail. So I fixed the error message. This is very useful when
monitoring lots of events in a single run.
Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20120920161945.GA7064@quad
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-record.c')
| -rw-r--r-- | tools/perf/builtin-record.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index c643ed669ef9..2cb74343de3e 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -297,8 +297,10 @@ try_again: } printf("\n"); - error("sys_perf_event_open() syscall returned with %d (%s). /bin/dmesg may provide additional information.\n", - err, strerror(err)); + error("sys_perf_event_open() syscall returned with %d " + "(%s) for event %s. /bin/dmesg may provide " + "additional information.\n", + err, strerror(err), perf_evsel__name(pos)); #if defined(__i386__) || defined(__x86_64__) if (attr->type == PERF_TYPE_HARDWARE && |