On Tue, Feb 08, 2011 at 04:08:28PM +0100, Aurelien Jarno wrote: > Aurelien Jarno a écrit : > > Paolo Bonzini a écrit : > >> On 02/08/2011 12:15 PM, Aurelien Jarno wrote: > >>> however > >>> it should not be done ignoring all the*current* drawbacks of the > >>> iothread mode. We know them (at least for some of them), so let's try to > >>> solve them. > >> Let's also enumerate them. > >> > > > > From what I know: > > - performance regression in TCG mode > > I setup an x86_64 guest on an x86_64 host (Intel Xeon E5345). Nothing > was running except the standard daemons and the CPU governor was set to > "performance" on all CPU. I then compared the network performance using > netperf in default mode, through a tap interface and a virtio nic. I got > the following results (quite reproducible, std below 0.5): > - without IO thread: 107.36 MB/s > - with IO thread: 89.93 MB/s >
And the same test on the code from september 2009: - without IO thread: 141.8 MB/s -- Aurelien Jarno GPG: 1024D/F1BCDB73 aurel...@aurel32.net http://www.aurel32.net
