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Re: [Xen-users] The bottleneck of using multinetwork card?

On Mon, Sep 6, 2010 at 1:57 PM, ma qiang <maqiang1984@xxxxxxxxx> wrote:
> 20% is the vm's utilization of cpu, not dom0's.
> My domU is hvm and centos linux.

HVM is known to have slower disk/network I/O.
Here are some things you could check:
- look at CPU performance on both dom0 and domU using a program that
can show individual CPU load (like htop). My guess is one CPU is at
100% utilization
- check to see if you're already using PV drivers. If not, using it
might increase throughput. See http://pastebin.com/fb6fe631 for
example (basically you need to make sure the correct modules are
loaded while others are blacklisted)
- Try using PV domU, and compare the results.


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