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xen-devel
Re: [Xen-devel] open/stat64 syscalls run faster on Xen VM than standard
Petersson, Mats wrote:
-----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,
I will do this experiments and see what is happening (as I promised in the
popen threads).
Thanks.
Xuehai
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