I will be re-doing the whole
test with a 4GB hard limit on the memory (for both the native case and the HVM
case) and also with 2 VCPU allocated for Dom0.
I don’t know what the difference
is in our environments. Maybe he was looking at overall time spent? I am
interested in the maximum jobs/minute which can be an indication of how much
horsepower we can get out of a guest VM.
Any answers for my other
From: Xu, Anthony
Sent: Thursday, January 31, 2008 5:11 PM
To: Kayvan Sylvan; xen-ia64-devel
Subject: RE: [Xen-ia64-devel] HVM Multi-Processor Performance followup
can see the drop in performance starts to get really bad at about 9 CPUs and
you increase guest vCPU number, the bottleneck may be dom0 vCPU number( only
1vCPU for dom0).
can try configure two/four vCPU for dom0, the performance may be back.
said there are ~70% degradation on RE-AIM7,
test result seems much better than his.
the difference of your test environment?
[mailto:xen-ia64-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Kayvan
Sent: 2008年2月1日 8:57
Subject: [Xen-ia64-devel] HVM Multi-Processor Performance followup
A follow-up on the multiprocessor performance benchmark on
We ran the RE-AIM7 benchmarks on a 5-cell (40 CPU) machine
and a single-cell 8-cpu NEC machine.
Here are the jobs per minute maximums.
You can see the drop in performance starts to get really bad
at about 9 CPUs and beyond.
What can I do to help improve this situation?
Are there any other experiments I can run?
What tools/profilers will help to gather more data here?
I am very interested in helping to solve this problem!
Thanks for your ideas and suggestions.