There's nothing in syslog for the VM or host that would imply performance degradation.
I have done this with hugepages and made sure huge page use was consistent. Previously I disabled hugepages and didn't see a difference but I haven't tested again.
I'm using (C)LVM back off FCoE/SAN but I haven't tried local LVM/qcow2 type backing.
I'm using libvirt, but the command line ends up looking like this, if you would like I can provide XML for libvirt as well.
There's nothing in syslog for the VM or host that would imply performance degradation.
I have done this with hugepages and made sure huge page use was consistent. Previously I disabled hugepages and didn't see a difference but I haven't tested again.
I'm using (C)LVM back off FCoE/SAN but I haven't tried local LVM/qcow2 type backing.
I'm using libvirt, but the command line ends up looking like this, if you would like I can provide XML for libvirt as well.
/usr/bin/kvm -name one-10 -S -M pc-1.3 -cpu Westmere -enable-kvm -m 73728 -smp 16,sockets= 2,cores= 8,threads= 1 -uuid 5ee0afd3- df3f-fb1f- 02bd-7cde2bc4ee 95 -no-user-config -nodefaults -chardev socket, id=charmonitor, path=/var/ lib/libvirt/ qemu/one- 10.monitor, server, nowait -mon chardev= charmonitor, id=monitor, mode=control -rtc base=utc, driftfix= slew -no-shutdown -device piix3-usb- uhci,id= usb,bus= pci.0,addr= 0x1.0x2 -drive file=/var/ lib/one/ /datastores/ 0/10/disk. 0,if=none, id=drive- virtio- disk0,format= raw,cache= none -device virtio- blk-pci, scsi=off, bus=pci. 0,addr= 0x4,drive= drive-virtio- disk0,id= virtio- disk0,bootindex =1 -drive file=/var/ lib/one/ /datastores/ 0/10/disk. 1,if=none, id=drive- ide0-0- 0,readonly= on,format= raw -device ide-cd, bus=ide. 0,unit= 0,drive= drive-ide0- 0-0,id= ide0-0- 0 -netdev tap,fd= 23,id=hostnet0 -device virtio- net-pci, netdev= hostnet0, id=net0, mac=02: 00:0a:64: 02:fd,bus= pci.0,addr= 0x3 -vnc 0.0.0.0:10,password -vga cirrus -device virtio- balloon- pci,id= balloon0, bus=pci. 0,addr= 0x5
I'll try experimenting more with THP disabled and different IO backends.