Re: kvm very slow

[Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>]

Ulrich Schreiner wrote:
> dmesg|grep kvm
>
> SELinux: initialized (dev kvmfs, type kvmfs), uses genfs_contexts
> kvm: emulating exchange as write
>
>   

There may be messages that aren't prefixed with 'kvm:' (that's a bug 
btw).  Please check.

> now booting into a F7 image, after the system is ready (and in idle):
>
> top
>    PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
> 14917 root      20   0  332m  71m  66m S    6  0.9   1:17.05 qemu-kvm
> 14954 root      20   0 14552 1072  812 R    0  0.0   0:00.01 top
>      1 root      20   0 10320  680  572 S    0  0.0   0:02.02 init
>
> kvm_stat (snapshot):
>
> kvm statistics
>
>   exits        12254399   79079
>   halt_exits     326543    4632
>   invlpg              0       0
>   io_exits      6539798   74320
>   irq_exits       43523      29
>   irq_window       4984       0
>   mmio_exits    1319016       0
>   pf_fixed      3140955      56
>   pf_guest       448187       6
>   request_irq         0       0
>   signal_exit     39728       0
>   tlb_flush       29511      31
>   

Wow -- lots of I/O exits.  What does 'top' in the guest say? 'hdparm 
/dev/hda' in the guest?

> when logging into the virtual machine (via ssh) the virtual world is 
> very slow: i set the time with "ntpdate" and wait exact one minute in 
> reality. in the virtual image only 24sec are gone!
>
> and everything else in the image is really slow.
>
>   

-- 
error compiling committee.c: too many arguments to function


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