[libvirt-users] Processor usage of qemu process.
Dominique Ramaekers
dominique.ramaekers at cometal.be
Fri Mar 13 15:56:02 UTC 2015
Small update: traceFlag T8038 => no improvement...
-----Oorspronkelijk bericht-----
Van: Dominique Ramaekers
Verzonden: vrijdag 13 maart 2015 16:35
Aan: 'Daniel P. Berrange'; Andrey Korolyov
CC: libvirt-users at redhat.com
Onderwerp: RE: [libvirt-users] Processor usage of qemu process.
Results
----------
First I want to show my appreciation to Daniel and Andrey. So thanks...
I've implemented Spice, removed the touchpad and implemented enlightenment timer...
PCVIRT1 with Windows 8.1 is on 5% host CPU usage... (OK)
CmsrvAPP2 with Server 2012 R2 is still on 50% (Bummer...) A new freshly installed Server 2012 R2 with nothing activated or installed on gives 12% (Not completely happy)
More tips are welcome....
See traceFlag T8038 section on https://pve.proxmox.com/wiki/Performance_Tweaks
I've also noticed it on other sources... On the CmsrvAPP2 the SQL server is a SQL essential, so I have to figure out how to set the traceFlag on a SQL essential...
-----Oorspronkelijk bericht-----
Van: Daniel P. Berrange [mailto:berrange at redhat.com]
Verzonden: vrijdag 13 maart 2015 11:41
Aan: Andrey Korolyov
CC: Dominique Ramaekers; libvirt-users at redhat.com
Onderwerp: Re: [libvirt-users] Processor usage of qemu process.
On Fri, Mar 13, 2015 at 12:58:32PM +0300, Andrey Korolyov wrote:
> On Fri, Mar 13, 2015 at 12:35 PM, Daniel P. Berrange
> <berrange at redhat.com> wrote:
> > On Fri, Mar 13, 2015 at 10:32:14AM +0100, Dominique Ramaekers wrote:
> >> Dear Daniel, my XML's:
> >>
> >> Note: It seems I was to quick, the Windows 8.1 isn't fixed...
> >>
> >> Windows Server 2015 R2
> >>
> >> <domain type='kvm' id='146'>
> >> <name>CmsrvAPP2</name>
> >> <uuid>02c5daef-662a-85ba-7291-485118badc64</uuid>
> >> <memory unit='KiB'>3149824</memory>
> >> <currentMemory unit='KiB'>3149824</currentMemory>
> >> <memoryBacking>
> >> <hugepages/>
> >> </memoryBacking>
> >> <vcpu placement='static'>4</vcpu>
> >> <resource>
> >> <partition>/machine</partition>
> >> </resource>
> >> <os>
> >> <type arch='x86_64' machine='pc-i440fx-trusty'>hvm</type>
> >> <boot dev='hd'/>
> >> <boot dev='cdrom'/>
> >> <bootmenu enable='yes'/>
> >> </os>
> >> <features>
> >> <acpi/>
> >> <apic/>
> >> <pae/>
> >> </features>
> >> <cpu mode='custom' match='exact'>
> >> <model fallback='allow'>Westmere</model>
> >> <vendor>Intel</vendor>
> >> <feature policy='require' name='pbe'/>
> >> <feature policy='require' name='rdtscp'/>
> >> <feature policy='require' name='est'/>
> >> <feature policy='require' name='vmx'/>
> >> <feature policy='require' name='ds'/>
> >> <feature policy='require' name='smx'/>
> >> <feature policy='require' name='ss'/>
> >> <feature policy='require' name='vme'/>
> >> <feature policy='require' name='dtes64'/>
> >> <feature policy='require' name='tm2'/>
> >> <feature policy='require' name='ht'/>
> >> <feature policy='require' name='dca'/>
> >> <feature policy='require' name='pcid'/>
> >> <feature policy='require' name='tm'/>
> >> <feature policy='require' name='pdcm'/>
> >> <feature policy='require' name='pdpe1gb'/>
> >> <feature policy='require' name='ds_cpl'/>
> >> <feature policy='require' name='pclmuldq'/>
> >> <feature policy='require' name='xtpr'/>
> >> <feature policy='require' name='acpi'/>
> >> <feature policy='require' name='monitor'/>
> >> </cpu>
> >> <clock offset='localtime'/>
> >> <on_poweroff>destroy</on_poweroff>
> >> <on_reboot>restart</on_reboot>
> >> <on_crash>restart</on_crash>
> >> <devices>
> >> <emulator>/usr/bin/kvm-spice</emulator>
> >> <disk type='file' device='cdrom'>
> >> <driver name='qemu' type='raw' cache='none'/>
> >> <source file='/var/lib/libvirt/images/poolCmsrvVH2/virtiodrivers.iso'/>
> >> <target dev='hda' bus='ide'/>
> >> <readonly/>
> >> <alias name='ide0-0-0'/>
> >> <address type='drive' controller='0' bus='0' target='0' unit='0'/>
> >> </disk>
> >> <disk type='file' device='cdrom'>
> >> <driver name='qemu' type='raw' cache='none'/>
> >> <source file='/var/lib/libvirt/images/poolCmsrvVH2/WIN2012R2.iso'/>
> >> <target dev='hdc' bus='ide'/>
> >> <readonly/>
> >> <shareable/>
> >> <alias name='ide0-1-0'/>
> >> <address type='drive' controller='0' bus='1' target='0' unit='0'/>
> >> </disk>
> >> <disk type='file' device='disk'>
> >> <driver name='qemu' type='raw' cache='none'/>
> >> <source file='/var/lib/libvirt/images/poolCmsrvVH2/CmsrvAPP2.raw'/>
> >> <target dev='vda' bus='virtio'/>
> >> <alias name='virtio-disk0'/>
> >> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
> >> </disk>
> >> <controller type='ide' index='0'>
> >> <alias name='ide0'/>
> >> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
> >> </controller>
> >> <controller type='usb' index='0'>
> >> <alias name='usb0'/>
> >> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
> >> </controller>
> >> <controller type='pci' index='0' model='pci-root'>
> >> <alias name='pci.0'/>
> >> </controller>
> >> <interface type='bridge'>
> >> <mac address='52:54:00:d2:40:25'/>
> >> <source bridge='br0'/>
> >> <target dev='vnet1'/>
> >> <model type='virtio'/>
> >> <alias name='net0'/>
> >> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
> >> </interface>
> >> <serial type='pty'>
> >> <source path='/dev/pts/2'/>
> >> <target port='0'/>
> >> <alias name='serial0'/>
> >> </serial>
> >> <console type='pty' tty='/dev/pts/2'>
> >> <source path='/dev/pts/2'/>
> >> <target type='serial' port='0'/>
> >> <alias name='serial0'/>
> >> </console>
> >> <input type='tablet' bus='usb'>
> >> <alias name='input0'/>
> >> </input>
> >> <input type='mouse' bus='ps2'/>
> >> <input type='keyboard' bus='ps2'/>
> >> <graphics type='vnc' port='5902' autoport='yes' listen='127.0.0.1'>
> >> <listen type='address' address='127.0.0.1'/>
> >> </graphics>
> >> <sound model='ich6'>
> >> <alias name='sound0'/>
> >> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
> >> </sound>
> >> <video>
> >> <model type='vmvga' vram='9216' heads='1'/>
> >> <alias name='video0'/>
> >> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
> >> </video>
> >> <memballoon model='virtio'>
> >> <alias name='balloon0'/>
> >> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
> >> </memballoon>
> >> </devices>
> >> <seclabel type='dynamic' model='apparmor' relabel='yes'>
> >> <label>libvirt-02c5daef-662a-85ba-7291-485118badc64</label>
> >> <imagelabel>libvirt-02c5daef-662a-85ba-7291-485118badc64</imagelabel>
> >> </seclabel>
> >> </domain>
> >
> > The USB tablet could be a culprint, as could the choice of video mode.
> >
> > I'd suggest that you want to install the QXL video driver, and setup
> > SPICE instead of VNC, along with the SPICE guest agent. This gives a
> > much better performing graphics layer, and better performing mouse.
> > instead of the USB tablet which is known to have high CPU cost.
> >
> > Regards,
> > Daniel
>
> There is none of enlightenment timer features enabled, I`d suggest to
> start fixing the issue by adding them in the config. USB tablet is a
> great problem too for a generated additional workload in idle, though
> usb3 tablet connection results in much lower cpu consumption than
> usb2.
The guest XML shown has not got either USB2 or USB3 controllers present, so the tablet will be operating in USB1 mode which is awful for performance
Regards,
Daniel
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