Messages in this thread | | | Date | Fri, 29 Nov 2019 11:06:39 +0100 | From | Michal Koutný <> | Subject | Re: [PATCH v2 1/3] sched/numa: advanced per-cgroup numa statistic |
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On Fri, Nov 29, 2019 at 01:19:33PM +0800, 王贇 <yun.wang@linux.alibaba.com> wrote: > I did some research regarding cpuacct, and find cpuacct_charge() is a good > place to do hierarchical update, however, what we get there is the execution > time delta since last update_curr(). I wouldn't extend cpuacct, I'd like to look into using the rstat mechanism for per-CPU runtime collection. (Most certainly I won't get down to this until mid December though.)
> I'm afraid we can't just do local/remote accumulation since the sample period > now is changing, still have to accumulate the execution time into locality > regions. My idea was to decouple time from the locality counters completely. It'd be up to the monitoring application to normalize differences wrt sampling rate (and handle wrap arounds).
Michal [unhandled content-type:application/pgp-signature] | |