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Re: [Xen-users] Performance issues

  • To: xen-users@xxxxxxxxxxxxxxxxxxx
  • From: Stephan Austermühle <au@xxxxxxx>
  • Date: Wed, 12 Apr 2006 07:22:58 +0200
  • Delivery-date: Tue, 11 Apr 2006 22:23:40 -0700
  • List-id: Xen user discussion <xen-users.lists.xensource.com>

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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