On 4 May 2015, at 09:35, Martijn Grendelman <martijn.grendelman@isaac.nl> wrote:
Hi,
Ever since our first Windows Server 2012 deployment on oVirt (3.4 back then, now 3.5.1), I have noticed that working on these VMs via RDP or on the console via VNC is noticeably slower than on Windows 2008 guests on the same oVirt environment. [snip]
Does anyone share this experience? Any idea why this could happen and how it can be fixed? Any other information I should share to get a better idea? Hi Martijn, Can you please provide the QEMU command line, together with kvm and qemu version?
This information will be helpful for reproducing the problem. However, if the problem is not reproducible on a local setup, we will probably need to ask collecting some performance information with xperf tool.
Sure!
Command line is this:
/usr/libexec/qemu-kvm -name Getafix -S -M rhel6.5.0 -cpu Penryn,hv_relaxed -enable-kvm -m 2048 -realtime mlock=off -smp 2,maxcpus=16,sockets=16,cores=1,threads=1 -uuid 34951c25-9a37-4712-a16a-fdfc98f4febc -smbios type=1,manufacturer=oVirt,product=oVirt Node,version=6-6.el6.centos.12.2,serial=44454C4C-3400-1058-804C-B1C04F42344A,uuid=34951c25-9a37-4712-a16a-fdfc98f4febc -nodefconfig -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/Getafix.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=2015-01-12T11:14:02,clock=vm,driftfix=slew -no-kvm-pit-reinjection -no-shutdown -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -device virtio-serial-pci,id=virtio-serial0,max_ports=16,bus=pci.0,addr=0x4 -drive if=none,media=cdrom,id=drive-ide0-1-0,readonly=on,format=raw,serial= -device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -drive file=/rhev/data-center/aefd5844-6e01-4070-b3b9-c0d73cc40c78/52678e67-a202-4306-b7ed-5fed8df10edf/images/28cc9a6c-6f2e-4b09-b361-f2a09f27dbc5/4c7b571e-4b29-47b9-ab4b-5799d64f28f9,if=none,id=drive-virtio-disk0,format=raw,serial=28cc9a6c-6f2e-4b09-b361-f2a09f27dbc5,cache=none,werror=stop,rerror=stop,aio=threads -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -netdev tap,fd=41,id=hostnet0,vhost=on,vhostfd=43 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=00:1a:4a:74:59:a2,bus=pci.0,addr=0x3 -chardev socket,id=charchannel0,path=/var/lib/libvirt/qemu/channels/34951c25-9a37-4712-a16a-fdfc98f4febc.com.redhat.rhevm.vdsm,server,nowait -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.rhevm.vdsm -chardev socket,id=charchannel1,path=/var/lib/libvirt/qemu/channels/34951c25-9a37-4712-a16a-fdfc98f4febc.org.qemu.guest_agent.0,server,nowait -device virtserialport,bus=virtio-serial0.0,nr=2,chardev=charchannel1,id=channel1,name=org.qemu.guest_agent.0 -device usb-tablet,id=input0 -vnc 172.17.6.14:7,password -k en-us -vga cirrus -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x6 -msg timestamp=on
Qemu version:
qemu-kvm-rhev-0.12.1.2-2.415.el6_5.14.x86_64
Please let me know if I can do more to help!
How about trying virtio-scsi? Same difference? We'll be supporting virtio blk dataplane in 3.6, that may affect the performance significantly. Also a EL7 hypervisor could change results a lot. Do you have any at hand to give it a try? Well, also hyperv enlightnment? Not sure, but worth a try. It's currently disabled in osinfo entry for Win8/2012, can you try that?(on a non-production VM;) Thanks, michal
Best regards, Martijn. _______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users