Hi Yang Jihong,
On 06/08/24 07:27, Yang Jihong wrote:
The --show-prio option is used to display the priority of task.
It is disabled by default, which is consistent with original behavior.
The display format is xxx (priority does not change during task running)
or xxx->yyy (priority changes during task running)
I had done the following steps.
1) Ran 'perf sched record stress-ng --cpu 32 -l 50 --timeout 40s'
2) Changed the nice value of stress-ng while the record was going on.
ps -C stress-ng -o pid=
64195
renice -n 10 -p 64195
3) Then ran 'perf sched timehist --show-prio'
343918.720052 [0015] stress-ng[64195] 120 0.013 0.013 21.719
.
.
343958.797257 [0009] stress-ng[64195] 130 40076.812 0.007 0.393
The output shows the final priority change of stress-ng from 120 to 130,
but the transition format xxx->yyy is not displayed.
Am I missing something?