diff options
| author | Arun Sharma <aruns@google.com> | 2010-06-04 11:27:10 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2010-06-05 09:35:53 -0300 |
| commit | f60f359383edf2a0ec3aa32cf8be98ad815bdf65 (patch) | |
| tree | a2e544f8a1c80f2fa34018903bef1e61d71b768a /tools/perf/util/event.c | |
| parent | 41a37e20178b081193b08b228030d8f562bfee62 (diff) | |
perf report: Implement --sort cpu
In a shared multi-core environment, users want to analyze why their
program was slow. In particular, if the code ran slower only on certain
CPUs due to interference from other programs or kernel threads, the user
should be able to notice that.
Sample usage:
perf record -f -a -- sleep 3
perf report --sort cpu,comm
Workload:
program is running on 16 CPUs
Experiencing interference from an antagonist only on 4 CPUs.
Samples: 106218177676 cycles
Overhead CPU Command
........ ... ...............
6.25% 2 program
6.24% 6 program
6.24% 11 program
6.24% 5 program
6.24% 9 program
6.24% 10 program
6.23% 15 program
6.23% 7 program
6.23% 3 program
6.23% 14 program
6.22% 1 program
6.20% 13 program
3.17% 12 program
3.15% 8 program
3.14% 0 program
3.13% 4 program
3.11% 4 antagonist
3.11% 0 antagonist
3.10% 8 antagonist
3.07% 12 antagonist
Cc: David S. Miller <davem@davemloft.net>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <20100505181612.GA5091@sharma-home.net>
Signed-off-by: Arun Sharma <aruns@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/event.c')
| -rw-r--r-- | tools/perf/util/event.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c index ed3e14ff6df..a7460868124 100644 --- a/tools/perf/util/event.c +++ b/tools/perf/util/event.c @@ -710,6 +710,7 @@ int event__preprocess_sample(const event_t *self, struct perf_session *session, al->map ? al->map->dso->long_name : al->level == 'H' ? "[hypervisor]" : "<not found>"); al->sym = NULL; + al->cpu = data->cpu; if (al->map) { if (symbol_conf.dso_list && |