linux-kernel - RE: fair group scheduler not so fair?

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Message-ID: <5FD5754DDBA0B1499B5A0B4BB54194850357ED61@fmsmsx411.amr.corp.intel.com>
Date:	Thu, 22 May 2008 13:18:33 -0700
From:	"Li, Tong N" <tong.n.li@...el.com>
To:	"Peter Zijlstra" <a.p.zijlstra@...llo.nl>,
	"Chris Friesen" <cfriesen@...tel.com>
Cc:	<linux-kernel@...r.kernel.org>, <vatsa@...ux.vnet.ibm.com>,
	<mingo@...e.hu>, <pj@....com>
Subject: RE: fair group scheduler not so fair?

Peter,

I didn't look at your patches, but I thought you were flattening group
weights down to task-level so that the scheduler only looks at per-task
weights. That'd make group fairness as good as task fairness gets. Is
this still the case?

  tong

>-----Original Message-----
>From: linux-kernel-owner@...r.kernel.org [mailto:linux-kernel-
>owner@...r.kernel.org] On Behalf Of Peter Zijlstra
>Sent: Thursday, May 22, 2008 1:08 PM
>To: Chris Friesen
>Cc: linux-kernel@...r.kernel.org; vatsa@...ux.vnet.ibm.com;
mingo@...e.hu;
>pj@....com
>Subject: Re: fair group scheduler not so fair?
>
>On Thu, 2008-05-22 at 14:02 -0600, Chris Friesen wrote:
>
>> I haven't really dug into the scheduler yet (although that's next),
but
>> based on these results it doesn't really look like the load balancer
is
>> properly group-aware.
>
>I'm trying, but its turning out to be rather more difficult than
>expected. Any help here would be much appreciated.
>
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