> -----Original Message----- > From: dev [mailto:[email protected]] On Behalf Of Jens Freimann > Sent: Monday, August 28, 2017 2:31 PM > To: Bie, Tiwei <[email protected]> > Cc: [email protected]; [email protected]; [email protected]; > Wang, Zhihong <[email protected]>; Yang, Zhiyong > <[email protected]> > Subject: Re: [dpdk-dev] [PATCH] vhost: adaptively batch small guest memory > copies > > Hi Tiwei, > > On Thu, Aug 24, 2017 at 10:19:39AM +0800, Tiwei Bie wrote: > >This patch adaptively batches the small guest memory copies. > >By batching the small copies, the efficiency of executing the > >memory LOAD instructions can be improved greatly, because the > >memory LOAD latency can be effectively hidden by the pipeline. > >We saw great performance boosts for small packets PVP test. > > this sounds interesting. Do you have numbers showing how much > performance improved for small packets? > > regards, > Jens Hi, Jens
On my test bench, the performance gain as following for 64B small packets Mergeable: 19% Vector ： 21% No-mergeable: 21% CPU info: Intel(R) Xeon(R) CPU E5-2699 v4 @ 2.20GHz OS: Ubuntu 16.04
