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From: | Anthony Liguori |
Subject: | Re: [Qemu-devel] Re: [RFC][PATCH] performance improvement for windows guests, running on top of virtio block device |
Date: | Mon, 11 Jan 2010 09:32:44 -0600 |
User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.5) Gecko/20091209 Fedora/3.0-4.fc12 Lightning/1.0pre Thunderbird/3.0 |
On 01/11/2010 09:31 AM, Avi Kivity wrote:
On 01/11/2010 05:22 PM, Anthony Liguori wrote:Based on our experiences with virtio-net, what I'd suggest is to make a lot of tunable options (ring size, various tx mitigation schemes, timeout durations, etc) and then we can do some deep performance studies to see how things interact with each other.I think we should do that before making any changes because I'm deeply concerned that we'll introduce significant performance regressions.I agree. We can start with this patch, with a tunable depth, defaulting to current behaviour.
I wouldn't be opposed to that provided we made it clear that these options were not supported long term. I don't want management tools (like libvirt) to start relying on them.
Regards, Anthony Liguori
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