Messages in this thread | | | Date | Tue, 24 Nov 2009 19:04:31 +0800 | From | Li Zefan <> | Subject | Re: [PATCH 0/5] perf kmem: Add more functions and show more statistics |
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>> Do perf-sched and perf-timechart work on this box? > > yeah: > > aldebaran:~> perf sched record sleep 1 > [ perf record: Woken up 1 times to write data ] > [ perf record: Captured and wrote 0.017 MB perf.data (~758 samples) ] > aldebaran:~> perf trace | tail -5 > distccd-20944 [010] 1792.787376: sched_stat_runtime: comm=distccd pid=20944 runtime=11196 [ns] vruntime=696395420043 [ns] > init-0 [009] 1792.914837: sched_stat_wait: comm=x86_64-linux-gc pid=881 delay=10686 [ns] > init-0 [009] 1792.915082: sched_stat_sleep: comm=events/9 pid=44 delay=2183651362 [ns] > as-889 [013] 1793.008008: sched_stat_runtime: comm=as pid=889 runtime=156807 [ns] vruntime=1553569219042 [ns] > init-0 [004] 1793.154400: sched_stat_wait: comm=events/4 pid=39 delay=12155 [ns] > > aldebaran:~> perf kmem record sleep 1 > [ perf record: Woken up 1 times to write data ] > [ perf record: Captured and wrote 0.078 MB perf.data (~3398 samples) ] > aldebaran:~> perf trace | tail -5 > aldebaran:~> > > the perf.data has mmap and exit events - but no kmem events. >
I was using yesterday's -tip tree, and I just updated to the latest -tip, and I found perf tools are not working:
# ./perf kmem record sleep 3 ... # ./perf trace perf-1805 [001] 66.239160: kmem_cache_free: ... perf-1806 [000] 66.403561: kmem_cache_alloc: ... swapper-0 [000] 66.420099: kmem_cache_free: ... # ./perf kmem record sleep 3 ... # ./perf trace # ./perf sched record sleep 3 .../ # ./perf trace perf-1825 [000] 103.543014: sched_stat_runtime: ... # ./perf sched record sleep 3 ... # ./perf trace #
So I think some new updates on kernel perf_event break.
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