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

2017-01-08 Thread Jason Wang
On 2017年01月08日 17:03, Dmitry Fleytman wrote: On 6 Jan 2017, at 10:08 AM, Ladi Prosek 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

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

2017-01-08 Thread Dmitry Fleytman
> On 6 Jan 2017, at 10:08 AM, Ladi Prosek 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 > > Microben

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

2017-01-06 Thread Ladi Prosek
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