----- Original Message ----- From: "Avi Kivity" <avi@xxxxxxxxxx> To: "David Cure" <kvm@xxxxxxxxxxx> Cc: kvm@xxxxxxxxxxxxxxx, "Vadim Rozenfeld" <vrozenfe@xxxxxxxxxx> Sent: Tuesday, February 14, 2012 3:32:16 PM Subject: Re: performance trouble On 02/10/2012 12:09 PM, David Cure wrote: > hello, > > Le Sun, Feb 05, 2012 at 11:38:34AM +0200, Avi Kivity ecrivait : > > > > Please post a trace as documented in http://www.linux-kvm.org/page/Tracing. > > I made the trace : started just before the slow function launch > and stoped just after. I start only one VM with 2 vcpus/16G RAM and only one > user connected to the VM to launch the test. > > The trace file is too big to post here, I gzip it and the file > is available here : http://www.roullier.net/report.txt.gz > > I hope you can find something strange. > It's reading the HPET like crazy. There are also tons of interrupts. Please use the windows performance tools to see which devices trigger these interrupts. [VR] +1 Try Microsoft Windows Performance Toolkit from Windows SDK http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=3138 It's really good. The HPET issue will be fixed by the hyper-V enlightenments, but these will take some time to cook. You can also try vhost-net to improve networking latency. -- error compiling committee.c: too many arguments to function -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
