From: Jiri Olsa <jo...@kernel.org>
We should support this because it would allow easily to collect metrics
for different threads in applications.
Original patch from posted by Jin Yao in here [1].
1. Current output, for example:
root@skl:/tmp# perf stat --per-thread -p 21623
^C
Performance counter stats for process id '21623':
vmstat-21623 0.517479 task-clock (msec) #
0.000 CPUs utilized
vmstat-21623 1 context-switches
vmstat-21623 0 cpu-migrations
vmstat-21623 0 page-faults
vmstat-21623 461,306 cycles
vmstat-21623 630,724 instructions
vmstat-21623 136,265 branches
vmstat-21623 2,520 branch-misses
1.444020756 seconds time elapsed
root@skl:/tmp# perf stat --per-thread --metrics ipc -p 21623
^C
Performance counter stats for process id '21623':
vmstat-21623 631,185 inst_retired.any
vmstat-21623 605,893 cpu_clk_unhalted.thread
1.415679293 seconds time elapsed
2. With this patch, the result would be:
root@skl:/tmp# perf stat --per-thread -p 21623
^C
Performance counter stats for process id '21623':
vmstat-21623 0.533759 task-clock (msec) #
0.000 CPUs utilized
vmstat-21623 1 context-switches #
0.002 M/sec
vmstat-21623 0 cpu-migrations #
0.000 K/sec
vmstat-21623 0 page-faults #
0.000 K/sec
vmstat-21623 473,896 cycles #
0.888 GHz
vmstat-21623 631,072 instructions #
1.33 insn per cycle
vmstat-21623 136,307 branches #
255.372 M/sec
vmstat-21623 2,524 branch-misses #
1.85% of all branches
1.544862861 seconds time elapsed
root@skl:/tmp# perf stat --per-thread --metrics ipc -p 21623
^C
Performance counter stats for process id '21623':
vmstat-21623 1,259,104 inst_retired.any #
1.2 IPC
vmstat-21623 1,056,756 cpu_clk_unhalted.thread
2.040954502 seconds time elapsed
[1] https://marc.info/?l=linux-kernel&m=150777054620511&w=2
Originally-from: Jin Yao <yao....@linux.intel.com>
Signed-off-by: Jiri Olsa <jo...@kernel.org>
Cc: Andi Kleen <a...@firstfloor.org>
Cc: Changbin Du <changbin...@intel.com>
Cc: David Ahern <dsah...@gmail.com>
Cc: Namhyung Kim <namhy...@kernel.org>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: Wang Nan <wangn...@huawei.com>
Link: http://lkml.kernel.org/n/tip-tr8ntktxmy4qc5769ajg5...@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com>
---
tools/perf/util/stat.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/tools/perf/util/stat.c b/tools/perf/util/stat.c
index ef00c91e2553..203f5d8d11d1 100644
--- a/tools/perf/util/stat.c
+++ b/tools/perf/util/stat.c
@@ -278,6 +278,8 @@ process_counter_values(struct perf_stat_config *config,
struct perf_evsel *evsel
perf_counts_values__scale(count, config->scale, NULL);
if (config->aggr_mode == AGGR_NONE)
perf_stat__update_shadow_stats(evsel, count->val, cpu);
+ if (config->aggr_mode == AGGR_THREAD)
+ perf_stat__update_shadow_stats(evsel, count->val, 0);
break;
case AGGR_GLOBAL:
aggr->val += count->val;
--
2.13.6
