16 Feb
2022
16 Feb
'22
6:33 p.m.
On Wed, 16 Feb 2022 10:09:14 -0800 Linus Torvalds torvalds@linux-foundation.org wrote:
Byungchul, could you fix those two issues? Some of your reports may well be entirely valid, but the hard-to-read hex offsets and the knowledge that at least some of them are confused about how prepare_to_wait -> wait actually works makes the motivation to look at the details much less..
Hi Byungchul,
I'm not sure what your tool is using to attach to the kernel to analyze the events (perhaps tracepoints?). But you can have the prepare_to_wait event just flag the task is about to wait, and then attach to the schedule (sched_switch) event to denote that it actually waited.
Of course have the finish_wait() clear the flag.
-- Steve