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From: | Karl Rister |
Subject: | Re: [Qemu-devel] [PATCH v4 00/13] aio: experimental virtio-blk polling mode |
Date: | Mon, 5 Dec 2016 10:40:49 -0600 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 |
On 12/05/2016 08:56 AM, Stefan Hajnoczi wrote: <snip> > Karl: do you have time to run a bigger suite of benchmarks to identify a > reasonable default poll-max-ns value? Both aio=native and aio=threads > are important. > > If there is a sweet spot that improves performance without pathological > cases then we could even enable polling by default in QEMU. > > Otherwise we'd just document the recommended best polling duration as a > starting point for users. > I have collected a baseline on the latest patches and am currently collecting poll-max-ns=16384. I can certainly throw in a few more scenarios. Do we want to stick with powers of 2 or some other strategy? -- Karl Rister <address@hidden>
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