Re: [Xen-users] TAP:AIO much slower then file: ?!

["Javier Guerra" <javier@xxxxxxxxxxx>]

On Thu, Jul 31, 2008 at 8:17 AM, MS <ms@xxxxxxxxxx> wrote:
> Hi!
>
> i checked the io performance with bonnie++ on an domU.
> With "file:" i get a goot result (nearly the dom0 results):

that "440M" is the test size? if so, it sounds too small.  it should
at least be twice (5-10x is better) the size of cache available.
remember, "file:" devices might be cached by the Dom0, "tap:" won't.
with small files it's common to see this pattern on most tests, but
won't benefit most real world uses.


-- 
Javier

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