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Commit 1863fbbb authored by Stephane Eranian's avatar Stephane Eranian Committed by Arnaldo Carvalho de Melo
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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: default avatarStephane 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 8f28f19a

tools/perf/builtin-record.c

+4 −2
Original line number Diff line number Diff line
@@ -297,8 +297,10 @@ static int perf_record__open(struct perf_record *rec) 
			}



			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 &&