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authorIngo Molnar <mingo@elte.hu>2009-09-13 18:15:54 +0200
committerIngo Molnar <mingo@elte.hu>2009-09-14 15:45:11 +0200
commitea57c4f5203d82c7844c54cdef54e972cf4e9d1f (patch)
tree13eb76a07480adbfe1bcabd25cde7cdd12907ddb /tools/perf/util
parentaa1ab9d26ae9fe2566a9036e3cb83e7d555b3987 (diff)
perf tools: Implement counter output multiplexing
Finish the -M/--multiplex option implementation: - separate it out from group_fd - correctly set it via the ioctl and dont mmap counters that are multiplexed - modify the perf record event loop to deal with buffer-less counters. - remove the -g option from perf sched record - account for unordered events in perf sched latency - (add -f to perf sched record to ease measurements) - skip idle threads (pid==0) in latency output The result is better latency output by 'perf sched latency': ----------------------------------------------------------------------------------- Task | Runtime ms | Switches | Average delay ms | Maximum delay ms | ----------------------------------------------------------------------------------- ksoftirqd/8 | 0.071 ms | 2 | avg: 0.458 ms | max: 0.913 ms | at-spi-registry | 0.609 ms | 19 | avg: 0.013 ms | max: 0.023 ms | perf | 3.316 ms | 16 | avg: 0.013 ms | max: 0.054 ms | Xorg | 0.392 ms | 19 | avg: 0.011 ms | max: 0.018 ms | sleep | 0.537 ms | 2 | avg: 0.009 ms | max: 0.009 ms | ----------------------------------------------------------------------------------- TOTAL: | 4.925 ms | 58 | --------------------------------------------- Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/util')
-rw-r--r--tools/perf/util/trace-event-parse.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/tools/perf/util/trace-event-parse.c b/tools/perf/util/trace-event-parse.c
index 64d6e302751..f6a8437141c 100644
--- a/tools/perf/util/trace-event-parse.c
+++ b/tools/perf/util/trace-event-parse.c
@@ -2722,8 +2722,10 @@ void print_event(int cpu, void *data, int size, unsigned long long nsecs,
type = trace_parse_common_type(data);
event = trace_find_event(type);
- if (!event)
- die("ug! no event found for type %d", type);
+ if (!event) {
+ printf("ug! no event found for type %d\n", type);
+ return;
+ }
pid = parse_common_pid(data);