Adding processing of stat and stat round events.
The stat data com in stat events, using generic function
process_stat_round_event to store data under perf_evsel object.
The stat-round events comes each interval or as last event in non
interval mode. The function process_stat_round_event process stored data
for each perf_evsel object and print it out.
Committer note:
After this patch:
$ perf stat record usleep 1
Performance counter stats for 'usleep 1':
0.498381 task-clock (msec) # 0.571 CPUs utilized
2 context-switches # 0.004 M/sec
0 cpu-migrations # 0.000 K/sec
149 page-faults # 0.299 M/sec
1,271,635 cycles # 2.552 GHz
928,712 stalled-cycles-frontend # 73.03% frontend cycles idle
663,286 stalled-cycles-backend # 52.16% backend cycles idle
792,614 instructions # 0.62 insns per cycle
# 1.17 stalled cycles per insn
136,850 branches # 274.589 M/sec
<not counted> branch-misses (0.00%)
0.000873419 seconds time elapsed
$
$ perf stat report
Performance counter stats for '/home/acme/bin/perf stat record usleep 1':
0.498381 task-clock (msec) # 0.571 CPUs utilized
2 context-switches # 0.004 M/sec
0 cpu-migrations # 0.000 K/sec
149 page-faults # 0.299 M/sec
1,271,635 cycles # 2.552 GHz
928,712 stalled-cycles-frontend # 73.03% frontend cycles idle
663,286 stalled-cycles-backend # 52.16% backend cycles idle
792,614 instructions # 0.62 insns per cycle
# 1.17 stalled cycles per insn
136,850 branches # 274.589 M/sec
<not counted> branch-misses (0.00%)
0.000873419 seconds time elapsed
$
Reported-by: Kan Liang <kan.liang@intel.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1446734469-11352-16-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
a56f9390aa