Yes I'd expect it to be very different. Make sure you enable hyperv enlightenment. Also disable USB, that will help too.
Cheers, Felipe Sent from my phone On 23 Feb 2016, at 09:01, Jean-Pierre Ribeauville <jpribeauvi...@axway.com<mailto:jpribeauvi...@axway.com>> wrote: Hi, Not yet … I’ ll do that . Is it a chance that it will be different with 2012R2 ? Regards, J.P. De : Felipe Franciosi [mailto:fel...@nutanix.com] Envoyé : lundi 22 février 2016 23:02 À : Jean-Pierre Ribeauville; Daniel P. Berrange Cc : qemu-devel@nongnu.org<mailto:qemu-devel@nongnu.org> Objet : Re: [Qemu-devel] %cpu used by qemu-kvm processes Out of curiosity: I noticed your VM is called WS2008r2. Do you still see this high cpu utilisation with WS2012r2? Thanks, Felipe From: <qemu-devel-bounces+felipe=nutanix....@nongnu.org<mailto:qemu-devel-bounces+felipe=nutanix....@nongnu.org>> on behalf of Jean-Pierre Ribeauville <jpribeauvi...@axway.com<mailto:jpribeauvi...@axway.com>> Date: Friday, 19 February 2016 12:06 To: "Daniel P. Berrange" <berra...@redhat.com<mailto:berra...@redhat.com>> Cc: "qemu-devel@nongnu.org<mailto:qemu-devel@nongnu.org>" <qemu-devel@nongnu.org<mailto:qemu-devel@nongnu.org>> Subject: Re: [Qemu-devel] %cpu used by qemu-kvm processes Hi, As I'm using a RHEV platform , most of these options are automatically adjusted by ovirt ( I presume) . Linux Guest: qemu 120443 1 1 Feb16 ? 00:59:57 /usr/libexec/qemu-kvm -name VM_RHEL7-1 -S -machine rhel6.5.0,accel=kvm,usb=off -cpu SandyBridge -m 4096 -realtime mlock=off -smp 2,maxcpus=16,sockets=16,cores=1,threads=1 -uuid ad1a8b0e-f8b6-4038-be3d-275f38e66eb3 -smbios type=1,manufacturer=oVirt,product=oVirt Node,version=7.1-1.el7,serial=4C4C4544-0044-3710-8057-B6C04F4D3632,uuid=ad1a8b0e-f8b6-4038-be3d-275f38e66eb3 -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-VM_RHEL7-1/monitor.sock,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=2016-02-16T15:13:59,driftfix=slew -global kvm-pit.lost_tick_policy=discard -no-hpet -no-shutdown -boot menu=on,strict=on -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -device virtio-scsi-pci,id=scsi0,bus=pci.0,addr=0x6 -device virtio-serial-pci,id=virtio-serial0,max_ports=16,bus=pci.0,addr=0x4 -drive if=none,id=drive-ide0-1-0,readonly=on,format=raw,serial= -device ide-cd,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -drive file=/rhev/data-center/00000002-0002-0002-0002-0000000002c5/3988b428-7ca9-4348-9604-89a74e5954a2/images/9d1986c5-2306-47c4-a968-f5d892120b4e/4d0e24fe-4321-4088-a6d2-d4b1093e3df8,if=none,id=drive-virtio-disk0,format=raw,serial=9d1986c5-2306-47c4-a968-f5d892120b4e,cache=none,werror=stop,rerror=stop,aio=native -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -netdev tap,fd=32,id=hostnet0,vhost=on,vhostfd=37 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=00:1a:4a:5c:db:00,bus=pci.0,addr=0x3 -chardev socket,id=charchannel0,path=/var/lib/libvirt/qemu/channels/ad1a8b0e-f8b6-4038-be3d-275f38e66eb3.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/ad1a8b0e-f8b6-4038-be3d-275f38e66eb3.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 -chardev socket,id=charchannel2,path=//var/lib/libvirt/qemu/VM_RHEL7-1_omnivision_1.agent,server,nowait -device virtserialport,bus=virtio-serial0.0,nr=3,chardev=charchannel2,id=channel2,name=omnivision_1.agent -chardev pty,id=charconsole0 -device virtconsole,chardev=charconsole0,id=console0 -device usb-tablet,id=input0 -vnc 10.147.60.186:5,password -k fr -device cirrus-vga,id=video0,bus=pci.0,addr=0x2 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x7 -msg timestamp=on [root@ldc01omv01 Unix_Agents_And_Servers]# Windows Guest : qemu 47377 1 10 Feb15 ? 09:48:47 /usr/libexec/qemu-kvm -name W2008R2-2 -S -machine rhel6.5.0,accel=kvm,usb=off -cpu SandyBridge,hv_relaxed -m 2048 -realtime mlock=off -smp 1,maxcpus=16,sockets=16,cores=1,threads=1 -uuid b59a0b76-a04f-4bd8-ac8d-093ac558341f -smbios type=1,manufacturer=oVirt,product=oVirt Node,version=7.1-1.el7,serial=4C4C4544-0044-3710-8057-B6C04F4D3632,uuid=b59a0b76-a04f-4bd8-ac8d-093ac558341f -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-W2008R2-2/monitor.sock,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=2016-02-15T12:26:10,clock=vm,driftfix=slew -global kvm-pit.lost_tick_policy=discard -no-hpet -no-shutdown -boot menu=on,strict=on -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -device virtio-scsi-pci,id=scsi0,bus=pci.0,addr=0x4 -device virtio-serial-pci,id=virtio-serial0,max_ports=16,bus=pci.0,addr=0x5 -drive if=none,id=drive-ide0-1-0,readonly=on,format=raw,serial= -device ide-cd,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -drive file=/rhev/data-center/00000002-0002-0002-0002-0000000002c5/aa48bdee-af68-4935-9e80-15886531b659/images/7bcde760-a0b5-4a1e-9e47-18ca562e59ab/bd6e4baa-d089-4d60-b8c9-34db10671883,if=none,id=drive-virtio-disk0,format=raw,serial=7bcde760-a0b5-4a1e-9e47-18ca562e59ab,cache=none,werror=stop,rerror=stop,aio=native -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x6,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -netdev tap,fd=35,id=hostnet0,vhost=on,vhostfd=36 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=00:1a:4a:5c:db:03,bus=pci.0,addr=0x3 -chardev socket,id=charchannel0,path=/var/lib/libvirt/qemu/channels/b59a0b76-a04f-4bd8-ac8d-093ac558341f.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/b59a0b76-a04f-4bd8-ac8d-093ac558341f.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 -chardev socket,id=charchannel2,path=//var/lib/libvirt/qemu/W2008R2-2_omnivision_1.agent,server,nowait -device virtserialport,bus=virtio-serial0.0,nr=3,chardev=charchannel2,id=channel2,name=omnivision_1.agent -chardev pty,id=charconsole0 -device virtconsole,chardev=charconsole0,id=console0 -device usb-tablet,id=input0 -vnc 10.147.60.186:4,password -k fr -device cirrus-vga,id=video0,bus=pci.0,addr=0x2 -incoming tcp:[::]:49152 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x7 -msg timestamp=on Thx. Regards, J.P. -----Message d'origine----- De : Daniel P. Berrange [mailto:berra...@redhat.com] Envoyé : vendredi 19 février 2016 13:01 À : Jean-Pierre Ribeauville Cc : qemu-devel@nongnu.org<mailto:qemu-devel@nongnu.org> Objet : Re: [Qemu-devel] %cpu used by qemu-kvm processes On Fri, Feb 19, 2016 at 11:58:38AM +0000, Jean-Pierre Ribeauville wrote: > Hi, > > My Guest users ask me why , from Host point of view , there is a big > difference interm of CPU % used by qemu-kvmcontrolling processs : > > Result of "top" on the host : > > For Windows guests: > > 8680 qemu 20 0 4939588 4.092g 9668 S 12.6 8.7 927:46.78 qemu-kvm > 47377 qemu 20 0 2903560 2.121g 9676 S 11.6 4.5 587:08.42 qemu-kvm > > For Linux Guests: > > 120443 qemu 20 0 4832180 1.312g 9628 S 1.7 2.8 59:43.79 qemu-kvm > 43224 qemu 20 0 4825724 2.235g 9664 S 1.0 4.8 105:27.18 qemu-kvm > 44894 qemu 20 0 4864728 1.450g 9648 S 1.0 3.1 41:30.73 qemu-kvm > 45000 qemu 20 0 4862676 1.508g 9648 S 0.3 3.2 39:41.45 qemu-kvm > > > These guests are just booted , nothing special running on it as shown by > "top" ran on the Linux Guest : > > %Cpu(s): 0.0 us, 0.2 sy, 0.0 ni, 99.8 id, 0.0 wa, 0.0 hi, 0.0 > si, 0.0 st > > Or on the Windows Guest > > C:\Users\Administrator>wmic cpu get loadpercentage LoadPercentage > 0 > 0 > > Any idea to help me to answer them ? At the very least please show the command line arguments used to boot the windows guests, and the arguments used with the Linux guests. The choice of hardware config can have a significant impact on performance of different guests Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|
