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From: Anthony Liguori <anthony@codemonkey.ws>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [5578] Increase default IO timeout from 10ms to 5s
Date: Fri, 31 Oct 2008 15:13:21 -0500	[thread overview]
Message-ID: <490B66E1.2070604@codemonkey.ws> (raw)
In-Reply-To: <20081031194105.GC16128@shareable.org>

Jamie Lokier wrote:
> Anthony Liguori wrote:
>   
>> With this patch, I see the number of wake-ups with an idle dynamic
>> ticks guest drop from 80 per second to about 15 times per second.
>>     
>
> That's great, it really is, but shouldn't it be less than that?
>
> Did you look at the wakeup rate shown by powertop in the guest, to see
> how many extra wakeups are caused by QEMU internals?
>   

I don't have a guest handy that I could run powertop on, but I know of 
at least a few timers that can be gotten rid of (like the rtc timers).

Regards,

Anthony Liguori

> -- Jamie
>
>
>   

      reply	other threads:[~2008-10-31 20:13 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-10-31 18:40 [Qemu-devel] [5578] Increase default IO timeout from 10ms to 5s Anthony Liguori
2008-10-31 18:52 ` Anthony Liguori
2008-11-02 19:08   ` [Qemu-devel] " Jan Kiszka
2008-11-03 20:04     ` Anthony Liguori
2008-11-03 20:36       ` Jan Kiszka
2008-11-03 21:50         ` Jan Kiszka
2008-11-03 22:00           ` Anthony Liguori
2008-11-03 22:03             ` Jan Kiszka
2008-11-04  8:07             ` andrzej zaborowski
2008-11-04  8:22               ` Jan Kiszka
2008-11-04  8:33                 ` andrzej zaborowski
2008-11-04 11:32                   ` Jamie Lokier
2008-11-04 16:22                     ` M. Warner Losh
2008-11-04 17:10                       ` Jan Kiszka
2008-11-04 17:55                         ` M. Warner Losh
2008-11-04 19:08                           ` Jan Kiszka
2008-11-05 15:00                       ` Jamie Lokier
2008-11-05 16:10                         ` M. Warner Losh
2008-11-05 18:21                           ` Jan Kiszka
2008-11-05 18:41                             ` Daniel P. Berrange
2008-11-05 20:16                             ` andrzej zaborowski
2008-11-05 20:28                               ` Daniel P. Berrange
2008-11-05 23:38                                 ` Jamie Lokier
2008-11-06  0:53                           ` Jamie Lokier
2008-11-06  5:19                             ` M. Warner Losh
2008-11-04  8:29           ` Avi Kivity
2008-10-31 19:41 ` [Qemu-devel] " Jamie Lokier
2008-10-31 20:13   ` Anthony Liguori [this message]

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