On 12/11/21 12:09 AM, Dexuan Cui wrote: >> From: Dexuan Cui >> Sent: Friday, December 10, 2021 7:45 PM >> >>> From: Jens Axboe <axboe@xxxxxxxxx> >>> >>> Just out of curiosity, can you do: >>> >>> # perf record -a -g -- sleep 3 >>> >>> when you see the excessive CPU usage, then attach the output of >>> >>> # perf report -g >>> >>> to a reply? > > I realized you only asked for the output of "pref report -g", which > is much smaller. Please see the attachment for it. > try_to_grab_pending() is the hottest function, e.g. see line 2479. Sorry, can you do: # perf report -g --no-children instead? -- Jens Axboe
