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| From: | Avi Kivity |
| Subject: | Re: [Qemu-devel] Re: [PATCH 2/3] virtio-pci: Use ioeventfd for virtqueue notify |
| Date: | Sun, 14 Nov 2010 14:19:10 +0200 |
| User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.12) Gecko/20101027 Fedora/3.1.6-1.fc14 Lightning/1.0b3pre Thunderbird/3.1.6 |
On 11/14/2010 01:05 PM, Avi Kivity wrote:
I agree, but let's enable virtio-ioeventfd carefully because bad code is out there.Sure. Note as long as the thread waiting on ioeventfd doesn't consume too much cpu, it will awaken quickly and we won't have the "transaction per timeslice" effect.btw, what about virtio-blk with linux-aio? Have you benchmarked that with and without ioeventfd?
And, what about efficiency? As in bits/cycle? -- error compiling committee.c: too many arguments to function
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