Re: 0.11: SMP guests using one host CPU only?

[Avi Kivity <avi@redhat.com>]

On 10/20/2009 07:17 PM, Tomasz Chmielewski wrote:
> Avi Kivity wrote:
>> On 10/20/2009 06:03 PM, Tomasz Chmielewski wrote:
>>> On a 8 CPU host, I created a guest with 4 CPUs (-smp 4).
>>>
>>> Unfortunately, the guest only uses one host CPU.
>>> For example, running "cat /dev/urandom | gzip -9 >/dev/null &" 
>>> several times on this guest causes load on only one host CPU.
>>>
>>> Is it expected?
>>
>> No.  What does 'top -H' show?
>
> In the guest - 4 CPUs with ~100% usage each (when I press "1"), 
> otherwise, in the task list, multiple "cat" processes taking most CPU 
> time (as it reads from /dev/urandom).
>
>
> In the host - qemu-system-x86 (one process/thread) taking ~100% CPU; 
> when I press "1", I see only one CPU is used 100%, 7 other CPUs are 
> more or less not used.
>

I meant, how many qemu threads are there, and how much cpu does each take?

-- 
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.