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Re: [Xen-devel] [PATCH][HVM] remove qemu shadow_vram patch forperformance

On 20/3/07 09:36, "Li, Xin B" <xin.b.li@xxxxxxxxx> wrote:

> The major problem this patch is trying to fix is the performance drop
> when multiple HVM guests are running, and I think we need a better
> solution for this.

>From my own reading of the code I would have thought that by removing that
SSE memcmp we'd be replacing periodic SSE block memcmp with periodic
pixel-by-pixel comparison (which is what I think we end up doing if we get
past the SSE memcmp?). I'm thinking particularly of the VNC side of things
rather than SDL here, by the way: you guys use SDL most of the time, right?

 -- Keir

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