Re: [Xen-users] Xen Partition Performance

[Mark Williamson <mark.williamson@xxxxxxxxxxxx>]

> Also be aware that the devices go through the buffer cache on dom0.  I
> would not be surprised that the performance to a partition, LVM volume, or
> loop device is not that different, since they all hit the buffer cache,
> especially if your tests do mostly reads.

I'm pretty sure the blkback driver bypasses the buffer cache...  Caching in 
dom0 might occur when using the loop device (due to the stack including the 
filesystem layer), but it shouldn't with the others.

Cheers,
Mark

-- 
Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!

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