RE: [Xen-devel] File System Performance - 10x slower

["Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>]

Check that the domain 0 kernel you are using has the appropriate drivers
for your hardware. It's probably using PIO or something daft.

> I ask since it should be almost *impossible* to get anything more 
> than a very small % slowdown on disk I/O unless things are very 
> broken -- most of our benchmarks to date show 0% slowdown (and 
> in some cases involving domU, a speedup due to additional buffering). 

Ian


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