From mboxrd@z Thu Jan  1 00:00:00 1970
From: Avi Kivity <avi@redhat.com>
Subject: Re: Windows Server 2008 VM performance
Date: Wed, 03 Jun 2009 00:48:43 +0300
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Cc: Andrew Theurer <habanero@linux.vnet.ibm.com>,
	KVM list <kvm@vger.kernel.org>
To: Javier Guerra <javier@guerrag.com>
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Javier Guerra wrote:
> On Tue, Jun 2, 2009 at 4:38 PM, Avi Kivity <avi@redhat.com> wrote:
>   
>> Andrew Theurer wrote:
>>     
>>> P.S. Here is the qemu cmd line for the windows VMs:
>>> /usr/local/bin/qemu-system-x86_64 -name newcastle-xdbt01 -hda
>>> /dev/disk/by-id/scsi-3600a0b80000f1eb10000074f4a02b08a
>>>       
>> Use: -drive /dev/very-long-name,cache=none instead of -hda to disable the
>> host cache.  Won't make much of a differnence for 5 MB/s though.
>>     
>
> would emulating SCSI instead of IDE help while we hope and wait for
> virtio_block drivers? (and better virtio_net).
>   

I don't think the scsi emulation currently supports command parallelism, 
but I could be wrong.

Worth trying.

-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.