linux-kernel - Re: [git pull] scheduler fixes

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Message-ID: <49730617.3090807@redhat.com>
Date:	Sun, 18 Jan 2009 12:36:07 +0200
From:	Avi Kivity <avi@...hat.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Mike Galbraith <efault@....de>,
	Kevin Shanahan <kmshanah@...b.org.au>,
	Andrew Morton <akpm@...ux-foundation.org>,
	a.p.zijlstra@...llo.nl, torvalds@...ux-foundation.org,
	linux-kernel@...r.kernel.org
Subject: Re: [git pull] scheduler fixes

Avi Kivity wrote:
> Avi Kivity wrote:
>>
>> A simple test running 10 idle guests over 4 cores doesn't reproduce 
>> (2.6.29-rc).  However we likely need a more complicated setup.
>>
>
> Letting the ping run for a while, I see
>
>> --- 10.35.18.172 ping statistics ---
>> 846 packets transmitted, 846 received, 0% packet loss, time 845917ms
>> rtt min/avg/max/mdev = 0.131/2.572/305.452/20.236 ms
>
> So it does reproduce.

I had a large Vista guest on that machine, so it was swapping heavily.  
Without swapping, latency is never more than a few milliseconds, and 
usually 150 microseconds.

-- 
error compiling committee.c: too many arguments to function

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