On Thu, Dec 8, 2011 at 2:29 PM, Mark Wu wrote:
> I tried to optimize the zero detecting code with SSE instruction. The idea
> comes from Paolo's patch "migration: vectorize is_dup_page". It's expected
> to give us an noticeable improvement. But I didn't find any improvement in
> the qemu-io tes
I tried to optimize the zero detecting code with SSE instruction. The
idea comes from Paolo's patch "migration: vectorize is_dup_page". It's
expected to give us an noticeable improvement. But I didn't find any
improvement in the qemu-io test even though I increased the image size
to 5GB. Th
The QED image format is able to efficiently represent clusters
containing zeroes with a magic offset value. This patch implements zero
write detection for allocating writes so that image streaming can copy
over zero clusters from a backing file without expanding the image file
unnecessarily.
This
