> What workload is this? Are you using virtio? yes,i using virtio and vhost. the cpu rate is 70%. I found it maybe caused by 2M HugePages. if didn't use 2M HugePages, there are no vm exits caused by ept violation. I will test the performance without 2M Hugepages later, and see why HugePage cause such a result. 2010/11/8 Avi Kivity <avi@xxxxxxxxxx>: > On 11/08/2010 02:15 PM, lidong chen wrote: >> >> I run my application both on xen and kvm, and I found the performance >> on kvm is worse than xen. >> >> kvm: 2.6.32-60.el6.x86_64 redhat 6 bate 2 >> xen: xen3.4.2 >> >> then i stat the vm exit reason, and i found the ept violation reason, >> kvm is much more than xen. the static result is : >> >> __ratelimit: 387 callbacks suppressed >> error gpa is 4273995776 >> error gpa is 4273995776 >> error gpa is 4273995776 >> error gpa is 4273995776 >> error gpa is 4273995776 > > fec00000, this is the IOAPIC. > > What workload is this? Are you using virtio? > >> error gpa is 782336 >> error gpa is 782336 >> error gpa is 782336 >> error gpa is 782336 >> error gpa is 782336 >> __ratelimit: 387 callbacks suppressed >> error gpa is 782336 >> error gpa is 782336 >> error gpa is 782336 >> error gpa is 782336 >> error gpa is 782336 >> error gpa is 782336 >> error gpa is 782336 >> error gpa is 782336 >> error gpa is 782336 >> error gpa is 782336 >> > > bf000, this is the display. What display mode are you using? is the > workload display intensive? > > Please provide reports using > > $ trace-cmd record -e kvm:kvm_page_fault > ^C > $ trace-cmd report > > > -- > 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
