Avi Kivity wrote:
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?
There is only one qemu thread for the 4-cpu guest.
--
Tomasz Chmielewski
http://wpkg.org
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