8:15 a.m.
On Thu, Feb 18, 2016 at 12:59:52PM +0100, John Obaterspok wrote:
2016-02-18 11:25 GMT+01:00 Martin Kletzander
<mkletzan(a)redhat.com>:
> On Thu, Feb 18, 2016 at 10:41:42AM +0100, John Obaterspok wrote:
>
>> 2016-02-18 10:13 GMT+01:00 Martin Kletzander <mkletzan(a)redhat.com>:
>>
>> On Thu, Feb 18, 2016 at 08:49:38AM +0100, John Obaterspok wrote:
>>>
>>> Hello,
>>>>
>>>> I'm using virt-manager on my F23 box to run a Windows 10 image but
the
>>>> performance is so bad it's killing me.
>>>>
>>>> I have "vmx" flag in /proc/cpuinfo
>>>>
>>>> # lsmod |grep kvm
>>>> kvm_intel 167936 6
>>>> kvm 503808 1 kvm_intel
>>>>
>>>> virtio-win-0.1.112-1.noarch
>>>>
>>>> But no virtio modules loaded. Should they be loaded nowadays?
>>>>
>>>>
>>> Not on the host AFAIK.
>>>
>>> The disk format used is vmdk with no caching and native mode.
>>>
>>>> The io is 100% in windows task manager performing less than 1MB/s
>>>>
>>>> Any clues?
>>>>
>>>>
>>>> What are the figures from the host? What is qemu doing and what are the
>>> other processes and devices doing?
>>>
>>>
>>> What is the best way to find this out?
>>
>>
> {,a,h}top should do for the initial runs, just to see if the block layer
> is busy or the CPU is busy or something else is blocking it
>
>
atop seems to indicate that sdd is busy?
DSK | sdd | busy 96% | | read 1455 | write
1319 | KiB/r 5 | KiB/w 9 | | MBr/s 0.74 | MBw/s
1.26 | avq 1.01 | | avio 3.43 ms |
# mount | grep sdd
/dev/sdd2 on /vm type ext4 (rw,relatime,seclabel,data=ordered)
And it doesn't do that in any other process on the host? It looks like
it's not related to virtualisation...
guest configuration is below:
<domain type='kvm'>
<name>win10-box</name>
<uuid>d4a67adb-5d30-42f8-b8c6-d3c4598700f2</uuid>
<memory unit='KiB'>4194304</memory>
<currentMemory unit='KiB'>4194304</currentMemory>
<vcpu placement='static'>4</vcpu>
<os>
<type arch='x86_64' machine='pc-i440fx-2.4'>hvm</type>
</os>
<features>
<acpi/>
<apic/>
<pae/>
<hyperv>
<relaxed state='on'/>
<vapic state='on'/>
<spinlocks state='on' retries='8191'/>
</hyperv>
<kvm>
<hidden state='on'/>
</kvm>
<vmport state='off'/>
</features>
<cpu mode='host-model'>
<model fallback='allow'/>
</cpu>
<clock offset='localtime'>
<timer name='rtc' tickpolicy='catchup'/>
<timer name='pit' tickpolicy='delay'/>
<timer name='hpet' present='no'/>
<timer name='hypervclock' present='yes'/>
</clock>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>restart</on_crash>
<pm>
<suspend-to-mem enabled='no'/>
<suspend-to-disk enabled='no'/>
</pm>
<devices>
<emulator>/usr/bin/qemu-kvm</emulator>
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
<source file='/usr/share/virtio-win/virtio-win.iso'/>
<target dev='hda' bus='ide'/>
<readonly/>
<address type='drive' controller='0' bus='0'
target='0' unit='0'/>
</disk>
<disk type='file' device='disk'>
<driver name='qemu' type='vmdk' cache='none'
io='native'/>
<source file='/vm/storage/win10-box.img'/>
<target dev='vda' bus='virtio'/>
<boot order='1'/>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x0a'
function='0x0'/>
</disk>
<controller type='usb' index='0' model='ich9-ehci1'>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x06'
function='0x7'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci1'>
<master startport='0'/>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x06'
function='0x0' multifunction='on'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci2'>
<master startport='2'/>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x06'
function='0x1'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci3'>
<master startport='4'/>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x06'
function='0x2'/>
</controller>
<controller type='pci' index='0' model='pci-root'/>
<controller type='ide' index='0'>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x01'
function='0x1'/>
</controller>
<controller type='virtio-serial' index='0'>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x05'
function='0x0'/>
</controller>
<controller type='sata' index='0'>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x08'
function='0x0'/>
</controller>
<interface type='direct'>
<mac address='52:54:00:cc:f0:31'/>
<source dev='eno1' mode='bridge'/>
<model type='virtio'/>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x03'
function='0x0'/>
</interface>
<serial type='pty'>
<target port='0'/>
</serial>
<console type='pty'>
<target type='serial' port='0'/>
</console>
<input type='tablet' bus='usb'/>
<input type='mouse' bus='ps2'/>
<input type='keyboard' bus='ps2'/>
<graphics type='spice' autoport='yes'/>
<sound model='ich6'>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x04'
function='0x0'/>
</sound>
<video>
<model type='vga' vram='16384' heads='1'/>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x02'
function='0x0'/>
</video>
<memballoon model='virtio'>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x07'
function='0x0'/>
</memballoon>
</devices>
</domain>