From: Erik Rull <erik.rull@rdsoftware.de>
To: Avi Kivity <avi@redhat.com>
Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>
Subject: Re: Interrupt Assignment on host
Date: Thu, 05 Nov 2009 20:09:11 +0100 [thread overview]
Message-ID: <4AF322D7.8080509@rdsoftware.de> (raw)
In-Reply-To: <4AEDAC47.8000908@redhat.com>
Avi Kivity wrote:
> On 10/28/2009 11:16 PM, Erik Rull wrote:
>> Hi all,
>>
>> after several tests it seems that the interrupt assignment on the host
>> systems influences the kvm performance drastically. If eth0, video and
>> usb
>> are on seperate interrupts the perfomance is way better than if they are
>> shared (that means on the same one).
>>
>> Normally this should not matter. But why is it within kvm? Does kvm
>> somehow
>> hook up into the interrupt service routines?
>
> No.
>
>> My guest is Windows XP SP3.
>
> Can you describe how performance suffers?
>
> Please provide vmstat (for host int/sec) and "kvm_stat -l -f
> 'exits|irq_exits'" output.
>
I'm sorry, but my target system has no python installed. Any ideas how to
do that manually?
- Erik
next prev parent reply other threads:[~2009-11-05 19:09 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-28 21:16 Interrupt Assignment on host Erik Rull
2009-11-01 15:41 ` Avi Kivity
2009-11-05 19:09 ` Erik Rull [this message]
2009-11-08 8:50 ` Avi Kivity
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