Re: [Qemu-devel] [PATCH] migration: use XBZRLE only after bulk stage

[Peter Lieven]

On 01.03.2013 15:08, Eric Blake wrote:
> On 03/01/2013 07:06 AM, Peter Lieven wrote:
> > > Do you have any benchmark numbers?  At any rate, the explanation seems
> > > sound, so a benchmark should show this.
> >
> > Do you have a particular test pattern in mind? If there is nothing going on
> > in the VM XBZRLE will not be better than normal copy at all.
> >
> > Otherwise you will have N xbzrle misses and 0 xbzrle pages without the
> > patch
> > and 0 xbzrle misses and 0 xbzrle pages with the patch.
>
> How about a migration of a guest running the synthetic r/w load
> generator in docs/xbzrle.txt?
Good idea. I will leave max downtime and bandwidth at default values.

Would you be happy with 1GB vRAM and 256MB page cache?

Peter