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

[Avi Kivity]

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.

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