linux-kernel - Re: [PATCH RFC] ioctl based CAT interface

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Message-ID: <20151113172740.GA13490@amt.cnet>
Date:	Fri, 13 Nov 2015 15:27:40 -0200
From:	Marcelo Tosatti <mtosatti@...hat.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Luiz Capitulino <lcapitulino@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Vikas Shivappa <vikas.shivappa@...el.com>,
	Tejun Heo <tj@...nel.org>, Yu Fenghua <fenghua.yu@...el.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH RFC] ioctl based CAT interface

On Fri, Nov 13, 2015 at 05:51:00PM +0100, Peter Zijlstra wrote:
> On Fri, Nov 13, 2015 at 02:39:33PM -0200, Marcelo Tosatti wrote:
> > + * 	* one tcrid entry can be in different locations 
> > + * 	  in different sockets.
> 
> NAK on that without cpuset integration.
> 
> I do not want freely migratable tasks having radically different
> performance profiles depending on which CPU they land.

Please expand on what "cpuset integration" means, operationally.
I hope it does not mean "i prefer cgroups as an interface",
because that does not mean much to me.

So you are saying this should be based on cgroups? Have you seen the
cgroups proposal and the issues with it, that have been posted? 


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