Date: Mon, 24 Aug 2015 17:40:00 -0400
From: Tejun Heo <tj@kernel.org>
To: Paul Turner <pjt@google.com>
Cc: Austin S Hemmelgarn <ahferroin7@gmail.com>,
        Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@redhat.com>,
        Johannes Weiner <hannes@cmpxchg.org>, lizefan@huawei.com,
        cgroups <cgroups@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>,
        kernel-team <kernel-team@fb.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH 3/3] sched: Implement interface for cgroup unified
 hierarchy
Message-ID: <20150824214000.GL28944@mtj.duckdns.org>
References: <20150818203117.GC15739@mtj.duckdns.org>
 <CAPM31RJNy3jgG=DYe6GO=wyL4BPPxwUm1f2S6YXacQmo7viFZA@mail.gmail.com>
 <20150822182916.GE20768@mtj.duckdns.org>
 <55DB3C76.5010009@gmail.com>
 <20150824170427.GA27262@mtj.duckdns.org>
 <CAPM31RJi07qs42YsH=4JQSbZ+J-zCLv8e7yELb3tF_qAZmLqRA@mail.gmail.com>
 <20150824210223.GH28944@mtj.duckdns.org>
 <CAPM31R+i7BD8x9h_6wZVTa0zCB7XP0SGL5dSA-n6h9PTeAEhug@mail.gmail.com>
 <20150824211707.GJ28944@mtj.duckdns.org>
 <CAPM31R+vt1oAPCB-q6570RqZtJVBu5MH=gcQD2m9mjauStV7MA@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <CAPM31R+vt1oAPCB-q6570RqZtJVBu5MH=gcQD2m9mjauStV7MA@mail.gmail.com>
User-Agent: Mutt/1.5.23 (2014-03-12)
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1145
Lines: 25

On Mon, Aug 24, 2015 at 02:19:29PM -0700, Paul Turner wrote:
> > Would it be possible for you to give realistic and concrete examples?
> > I'm not trying to play down the use cases but concrete examples are
> > usually helpful at putting things in perspective.
> 
> I don't think there's anything that's not realistic or concrete about
> the example above.  The "suppose" parts were only for qualifying the
> pool sizes for vcpu and non-vcpu threads above since discussion of
> implementation using nice is dependent on knowing these counts.

Hmm... I was hoping for an actual configurations and usage scenarios.
Preferably something people can set up and play with.  I take that the
CPU intensive helper threads are usually IO workers?  Is the scenario
where the VM is set up with a lot of IO devices and different ones may
consume large amount of CPU cycles at any given point?

Thanks.

-- 
tejun
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/