Monday Jun 09, 2008

xVM performance counters

It's possible to access performance counters through the xen console and I wonder whether it would be a good idea to have these enabled by default in the shipping xVM product? I've opened an RFE to track this idea and if anyone reading this is a user of xVM, I would be interested in hearing your opinion about this.

If the runtime overhead of maintaining the counters is sufficiently low, I'm in favour. I found them to be very useful in diagnosing a problem in 64 bit HVM guest performance and I'm sure there's a lot more information they can tell us that will help improve xVM performance.

Take a look at:

6699320 xvm/hypervisor performance slow on HVM guests

6704764 Enable performance counters by default

for more details.

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garypen

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