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From: "Xie, Huawei" <huawei.xie@intel.com>
To: Changchun Ouyang <changchun.ouyang@hotmail.com>, "dev@dpdk.org"
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Thread-Topic: [dpdk-dev] [RFC PATCH] vhost: remove lockless enqueue to virt
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Date: Fri, 6 Nov 2015 05:50:31 +0000
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Cc: "ann.zhuangyanying@huawei.com" <ann.zhuangyanying@huawei.com>
Subject: Re: [dpdk-dev] [RFC PATCH] vhost: remove lockless enqueue to virt
 ring
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On 11/6/2015 9:48 AM, Changchun Ouyang wrote:=0A=
>=0A=
>=0A=
> > From: huawei.xie@intel.com=0A=
> > To: huawei.xie@intel.com; dev@dpdk.org=0A=
> > Date: Thu, 5 Nov 2015 10:21:41 +0000=0A=
> > CC: haifeng.lin@intel.com; ann.zhuangyanying@huawei.com=0A=
> > Subject: Re: [dpdk-dev] [RFC PATCH] vhost: remove lockless enqueue=0A=
> to virt ring=0A=
> >=0A=
> > If no objections, would remove the internal cmpset enqueue, should get=
=0A=
> > some improved performance.=0A=
>=0A=
> I think it is good.=0A=
> The vhost sample also need some changes for this modification.=0A=
> do we have the percentage of gaining when removing the lock?=0A=
The atomic cmpset is a costly operation.=0A=
We plan to implement vhost/virtio performance test example, which will=0A=
cover the most common scenarios.=0A=
/huawei=0A=
>=0A=
> thanks and regards,=0A=
> Changchun=0A=
>=0A=