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From: "Ouyang, Changchun" <changchun.ouyang@intel.com>
To: Tetsuya.Mukawa <mukawa@igel.co.jp>, "dev@dpdk.org" <dev@dpdk.org>
Cc: Katsuya MATSUBARA <matsu@igel.co.jp>,
	"nakajima.yoshihiro@lab.ntt.co.jp"
	<nakajima.yoshihiro@lab.ntt.co.jp>,
	Hitoshi Masutani <masutani.hitoshi@lab.ntt.co.jp>
Subject: Re: [dpdk-dev] [RFC] lib/librte_vhost: qemu vhost-user support into DPDK vhost library
Date: Wed, 27 Aug 2014 05:01:42 +0000
Message-ID: <F52918179C57134FAEC9EA62FA2F96251183B731@shsmsx102.ccr.corp.intel.com> (raw)
In-Reply-To: <53FD60FD.5090903@igel.co.jp>

Hi Tetsuya

Thanks for your response.
Agree with you, the performance should be same as the data path (RX/TX) is not affected,
The difference between implementation only exists in the virtio device creation and destroy stage.

Regards,
Changchun

> -----Original Message-----
> From: Tetsuya.Mukawa [mailto:mukawa@igel.co.jp]
> Sent: Wednesday, August 27, 2014 12:39 PM
> To: Ouyang, Changchun; dev@dpdk.org
> Cc: Xie, Huawei; Katsuya MATSUBARA; nakajima.yoshihiro@lab.ntt.co.jp;
> Hitoshi Masutani
> Subject: Re: [dpdk-dev] [RFC] lib/librte_vhost: qemu vhost-user support into
> DPDK vhost library
> 
> 
> (2014/08/27 9:43), Ouyang, Changchun wrote:
> > Do we have performance comparison between both implementation?
> Hi Changchun,
> 
> If DPDK applications are running on both guest and host side, the
> performance should be almost same, because while transmitting data virt
> queues are accessed by virtio-net PMD and libvhost. In libvhost, the existing
> vhost implementation and a vhost-user implementation will shares or uses
> same code to access virt queues. So I guess the performance will be almost
> same.
> 
> Thanks,
> Tetsuya
> 
> 
> > Thanks
> > Changchun
> >
> >
> > -----Original Message-----
> > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Xie, Huawei
> > Sent: Tuesday, August 26, 2014 7:06 PM
> > To: dev@dpdk.org
> > Subject: Re: [dpdk-dev] [RFC] lib/librte_vhost: qemu vhost-user
> > support into DPDK vhost library
> >
> > Hi all:
> > We are implementing qemu official vhost-user interface into DPDK vhost
> library, so there would be two coexisting implementations for user space
> vhost backend.
> > Pro and cons in my mind:
> > Existing solution:
> > Pros:  works with qemu version before 2.1;  Cons: depends on eventfd
> proxy kernel module and extra maintenance effort Qemu vhost-user:
> >                Pros:  qemu official us-vhost interface;     Cons: only available after
> qemu 2.1
> >
> > BR.
> > huawei

  reply	other threads:[~2014-08-27  4:57 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-08-26 11:05 Xie, Huawei
2014-08-27  0:43 ` Ouyang, Changchun
2014-08-27  4:39   ` Tetsuya.Mukawa
2014-08-27  5:01     ` Ouyang, Changchun [this message]
2014-08-27  5:27       ` Tetsuya.Mukawa
2014-08-27  5:56         ` Xie, Huawei
2014-08-27  6:07           ` Tetsuya.Mukawa
2014-08-27  5:58         ` Tetsuya.Mukawa
2014-08-27  6:00         ` Ouyang, Changchun
2014-08-27  6:09           ` Tetsuya.Mukawa
2014-09-13  5:27 ` Linhaifeng
2014-09-16  1:36   ` Xie, Huawei

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