Message-ID: <1460574934.3775.77.camel@gmail.com>
Subject: Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource
 group and PRIO_RGRP
From: Mike Galbraith <umgwanakikbuti@gmail.com>
To: Tejun Heo <tj@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
        Johannes Weiner <hannes@cmpxchg.org>, torvalds@linux-foundation.org,
        akpm@linux-foundation.org, mingo@redhat.com, lizefan@huawei.com,
        pjt@google.com, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org,
        linux-api@vger.kernel.org, kernel-team@fb.com
Date: Wed, 13 Apr 2016 21:15:34 +0200
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On Wed, 2016-04-13 at 11:59 -0400, Tejun Heo wrote:

> Are you saying that you're aware that google or another big outfit is
> making active use of internal tasks competing against sibling cgroups
> for proportional CPU distribution?  If so, can you please be more
> specific?

What I'm aware of is a big outfit that moves thread pool workers in/out
of a large number of cpu/cpuacct cgroups.  What all a worker thread may
spawn in a cgroup, or find already there upon arrival and thus compete
with I do not know. 

I'm baffled by why anyone would care which entity competes with which
other entity.  An entity is an entity is an entity.

	-Mike