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RE: [Xen-users] Performance issues

  • To: Stephan Austermühle <au@xxxxxxx>, <xen-users@xxxxxxxxxxxxxxxxxxx>
  • From: "Zhao, Yunfeng" <yunfeng.zhao@xxxxxxxxx>
  • Date: Wed, 12 Apr 2006 13:32:10 +0800
  • Delivery-date: Tue, 11 Apr 2006 22:33:07 -0700
  • List-id: Xen user discussion <xen-users.lists.xensource.com>
  • Thread-index: AcZd8VXVm+bQ7059Teqf0vtaKwcl3wAALDww
  • Thread-topic: [Xen-users] Performance issues

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

>-----Original Message-----
>From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
>[mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Stephan
>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?

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