RE: [Xen-users] Performance issues

["Zhao, Yunfeng" <yunfeng.zhao@xxxxxxxxx>]

Hi,Stephan
Are you using UP or SMP kernel for the performance testing?

Thanks
Yunfeng
>-----Original Message-----
>From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
>[mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Stephan
>Austermühle
>Sent: 2006年4月12日 13:23
>To: xen-users@xxxxxxxxxxxxxxxxxxx
>Subject: Re: [Xen-users] Performance issues
>
>Hi Randy!
>
>Randy Thelen schrieb:
>
>>>             native    domU    loss
>>> make -j4      553s      666s   -17%
>>> make -j2      565s      713s   -22%
>>> make                1,026s    1,199s   -14%
>>
>> This is very interesting, Stephan.  Could you run a test with dom0
>> compiling the kernel?
>
>I have setup a dom0 with 512 MByte RAM and got the following results:
>
>               native  dom0    loss
>make -j4         553s    778s  -29%
>make -j2         565s  1,458s  -61% (!)
>make           1,026s  1,434s  -28%
>
>These results look quite strange to me -- the dom0 performance is worse
> than the domU one. I ran the compile sequence with '-j2' three times --
>the remarkable bad result is reproducable. It would be nice if somebody
>can confirm my results.
>
>Anybody having an explanation for that?
>
>Stephan

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