RE: [Xen-devel] open/stat64 syscalls run faster on Xen VM than standard Linux

["Petersson, Mats" <mats.petersson@xxxxxxx>]

> -----Original Message-----
> From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of 
> Anthony Liguori
> Sent: 28 November 2005 14:39
> To: xuehai zhang
> Cc: Xen Mailing List
> Subject: Re: [Xen-devel] open/stat64 syscalls run faster on 
> Xen VM than standard Linux
> 
> This may just be the difference between having the extra 
> level of block caching from using a loop back device.
> 
> Try running the same benchmark on a domain that uses an 
> actual partition.  While the syscalls may appear to be 
> faster, I imagine it's because the cost of pulling in a block 
> has already been payed so the overall workload is unaffected.

And this would be the same as running standard linux with the loopback
file-system mounted and chroot to the local file-system, or would that
be different? [I'm asking because I don't actually understand enough
about how it works to know what difference it makes, and I would like to
know, because at some point I'll probably need to know this.]

--
Mats
> 
> Regards,
> 
> Anthony Liguori
> 
> xuehai zhang wrote:
[snip]


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