Re: [PATCH 0/2 v4] sched: Rewrite per entity runnable load average tracking

From: Peter Zijlstra
Date: Wed Jul 30 2014 - 06:21:45 EST

On Wed, Jul 30, 2014 at 11:13:31AM +0100, Morten Rasmussen wrote:
> It is a very real problem when user-space uses priorities extensively
> like Android does. Tasks related to audio run at very high priorities
> but only for a very short amount of time, but due the to priority
> scaling their load ends up being several times higher than tasks running
> all the time at normal priority. Hence task load is a very poor
> indicator of utilization.

FWIW Android (which I think does this through binder) is utterly insane
in this regard. But yes, we have to live with it.

Attachment: pgpOkFMrFVieL.pgp
Description: PGP signature