From: "Yao, Lei A" <lei.a.yao@intel.com>
To: Jens Freimann <jfreimann@redhat.com>, "Bie, Tiwei" <tiwei.bie@intel.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>,
"yliu@fridaylinux.org" <yliu@fridaylinux.org>,
"maxime.coquelin@redhat.com" <maxime.coquelin@redhat.com>,
"Wang, Zhihong" <zhihong.wang@intel.com>,
"Yang, Zhiyong" <zhiyong.yang@intel.com>
Subject: Re: [dpdk-dev] [PATCH] vhost: adaptively batch small guest memory copies
Date: Mon, 28 Aug 2017 11:41:31 +0000 [thread overview]
Message-ID: <2DBBFF226F7CF64BAFCA79B681719D953A25ED65@shsmsx102.ccr.corp.intel.com> (raw)
In-Reply-To: <20170828063123.l2eu7cetbr537boc@localhost.localdomain>
> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Jens Freimann
> Sent: Monday, August 28, 2017 2:31 PM
> To: Bie, Tiwei <tiwei.bie@intel.com>
> Cc: dev@dpdk.org; yliu@fridaylinux.org; maxime.coquelin@redhat.com;
> Wang, Zhihong <zhihong.wang@intel.com>; Yang, Zhiyong
> <zhiyong.yang@intel.com>
> 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
next prev parent reply other threads:[~2017-08-28 11:42 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-24 2:19 Tiwei Bie
2017-08-28 6:31 ` Jens Freimann
2017-08-28 11:41 ` Yao, Lei A [this message]
2017-09-01 9:45 ` Maxime Coquelin
2017-09-01 10:33 ` Tiwei Bie
2017-09-07 17:47 ` Maxime Coquelin
2017-09-08 0:48 ` Tiwei Bie
2017-09-08 7:41 ` Yuanhan Liu
2017-09-08 10:38 ` Tiwei Bie
2017-09-08 12:50 ` [dpdk-dev] [PATCH v2] " Tiwei Bie
2017-09-09 14:58 ` santosh
2017-09-11 1:27 ` Tiwei Bie
2017-09-11 12:06 ` Yuanhan Liu
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