qemu-devel@nongnu.org
[Top] [All Lists]

Re: [Qemu-devel] [PATCH] block-raw: Make cache=off default again

Subject: Re: [Qemu-devel] [PATCH] block-raw: Make cache=off default again
From: Avi Kivity
Date: Mon, 22 Jun 2009 14:55:37 +0300
On 06/22/2009 02:44 PM, Kevin Wolf wrote:
I haven't done real benchmarks for some time, but my simple test cases
like "run mke2fs on an empty image" have shown great improvement (at
least on IDE, for virtio I haven't understood yet what influences the
size of its requests - you should have received a private mail from Dor
about this). Possibly we could even enable cache=off for qcow2 now.

IIUC, you have a nice setup to measure block performance now. Maybe
you'd like to let it run with qcow2 and cache=wb/none?

Were your refcount-combining patches merged? I don't see them, and performance will suck without them.

--
error compiling committee.c: too many arguments to function



<Prev in Thread] Current Thread [Next in Thread>