Re: [Qemu-devel] [PATCH] net: optimize checksum computation

[Jason Wang]

On 2017年01月08日 17:03, Dmitry Fleytman wrote:
> > On 6 Jan 2017, at 10:08 AM, Ladi Prosek <address@hidden> wrote:
> >
> > Very simple loop optimization with a significant performance impact.
> >
> > Microbenchmark results, modern x86-64:
> >
> > buffer size | speed up
> > ------------+---------
> > 1500        | 1.7x
> > 64          | 1.5x
> > 8           | 1.15x
> >
> > Microbenchmark results, POWER7:
> >
> > buffer size | speed up
> > ------------+---------
> > 1500        | 5x
> > 64          | 3.3x
> > 8           | 1.13x
> >
> > There is a lot of room for further improvement at the expense of
> > code complexity - aligned multibyte reads, LE/BE considerations,
> > architecture-specific optimizations, etc. This patch still keeps
> > things simple and readable.
> Reviewed-by: Dmitry Fleytman <address@hidden>

Applied to -net.

Thanks