Re: [PATCH] tick-sched: fix idle and iowait sleeptime accounting vs CPU hotplug

[Frederic Weisbecker]

Le Mon, Jan 22, 2024 at 10:19:30AM -0800, Tim Chen a écrit :
> On Mon, 2024-01-15 at 17:35 +0100, Heiko Carstens wrote:
> > 
> >  
> > +	idle_sleeptime = ts->idle_sleeptime;
> > +	iowait_sleeptime = ts->iowait_sleeptime;
> >  	memset(ts, 0, sizeof(*ts));
> > +	ts->idle_sleeptime = idle_sleeptime;
> > +	ts->iowait_sleeptime = iowait_sleeptime;
> >  }
> 
> Should idle_calls and idle_sleeps be preserved and
> restored too?  
> 
> Seems like if we preserve the
> idle_sleeptime, and wish to compute the average
> sleep time per sleep, we will need to know the value of
> idle_sleeps that's also preserved across CPU offline/online.

I guess those can be saved as well. Would you like to send the patch?

Thanks.

> 
> Tim