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xen-devel
Re: [Xen-devel] File System Performance - 10x slower
> I am evaluating File I/O performance using Xen & comparing it with
> baseline (Fedora Core 3, with 2.6.9 kernel).
>
[snip poor I/O results]
>
> Can someone why I am getting such huge difference in performance
> compared to baseline ??
What version of Xen are you using? 2.0.x [preferably 2.0.3]?
Did you move /lib/tls out of the way on the various root filesystems?
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).
Can you post the output of Xen / dom0 / domU booting, and your
configuration files?
cheers,
S.
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