On Tuesday 30 November 2010 17:10:11 lidong chen wrote: > sr-iov also meet this problem, MSIX mask waste a lot of cpu resource. > > I test kvm with sriov, which the vf driver could not disable msix. > so the host os waste a lot of cpu. cpu rate of host os is 90%. > > then I test xen with sriov, there ara also a lot of vm exits caused by > MSIX mask. > but the cpu rate of xen and domain0 is less than kvm. cpu rate of xen > and domain0 is 60%. > > without sr-iov, the cpu rate of xen and domain0 is higher than kvm. > > so i think the problem is kvm waste more cpu resource to deal with MSIX > mask. and we can see how xen deal with MSIX mask. > > if this problem sloved, maybe with MSIX enabled, the performace is better. Please refer to my posted patches for this issue. http://www.spinics.net/lists/kvm/msg44992.html -- regards Yang, Sheng > > 2010/11/23 Avi Kivity <avi@xxxxxxxxxx>: > > On 11/23/2010 09:27 AM, lidong chen wrote: > >> can you tell me something about this problem. > >> thanks. > > > > Which problem? > > > > -- > > I have a truly marvellous patch that fixes the bug which this > > signature is too narrow to contain. -- 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
