From: "Zhang, Qi Z" <qi.z.zhang@intel.com>
To: "Zhang, Qi Z" <qi.z.zhang@intel.com>,
Jason Wang <jasowang@redhat.com>, "dev@dpdk.org" <dev@dpdk.org>
Cc: "Karlsson, Magnus" <magnus.karlsson@intel.com>,
"Topel, Bjorn" <bjorn.topel@intel.com>
Subject: Re: [dpdk-dev] [RFC 0/7] PMD driver for AF_XDP
Date: Thu, 1 Mar 2018 04:20:43 +0000 [thread overview]
Message-ID: <039ED4275CED7440929022BC67E706115315D47B@SHSMSX103.ccr.corp.intel.com> (raw)
In-Reply-To: <039ED4275CED7440929022BC67E706115315D465@SHSMSX103.ccr.corp.intel.com>
+Magnus, since a typo in my first batch in email address.
> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Zhang, Qi Z
> Sent: Thursday, March 1, 2018 12:19 PM
> To: Jason Wang <jasowang@redhat.com>; dev@dpdk.org
> Cc: magnus.karlsson@intei.com; Topel, Bjorn <bjorn.topel@intel.com>
> Subject: Re: [dpdk-dev] [RFC 0/7] PMD driver for AF_XDP
>
>
>
> > -----Original Message-----
> > From: Jason Wang [mailto:jasowang@redhat.com]
> > Sent: Thursday, March 1, 2018 10:52 AM
> > To: Zhang, Qi Z <qi.z.zhang@intel.com>; dev@dpdk.org
> > Cc: magnus.karlsson@intei.com; Topel, Bjorn <bjorn.topel@intel.com>
> > Subject: Re: [dpdk-dev] [RFC 0/7] PMD driver for AF_XDP
> >
> >
> >
> > On 2018年02月27日 17:32, Qi Zhang wrote:
> > > The RFC patches add a new PMD driver for AF_XDP which is a proposed
> > > faster version of AF_PACKET interface in Linux, see below link for
> > > detail AF_XDP introduction:
> > > https://fosdem.org/2018/schedule/event/af_xdp/
> > > https://lwn.net/Articles/745934/
> > >
> > > This patchset is base on v18.02.
> > > It also require a linux kernel that have below AF_XDP RFC patches be
> > > applied.
> > > https://patchwork.ozlabs.org/patch/867961/
> > > https://patchwork.ozlabs.org/patch/867960/
> > > https://patchwork.ozlabs.org/patch/867938/
> > > https://patchwork.ozlabs.org/patch/867939/
> > > https://patchwork.ozlabs.org/patch/867940/
> > > https://patchwork.ozlabs.org/patch/867941/
> > > https://patchwork.ozlabs.org/patch/867942/
> > > https://patchwork.ozlabs.org/patch/867943/
> > > https://patchwork.ozlabs.org/patch/867944/
> > > https://patchwork.ozlabs.org/patch/867945/
> > > https://patchwork.ozlabs.org/patch/867946/
> > > https://patchwork.ozlabs.org/patch/867947/
> > > https://patchwork.ozlabs.org/patch/867948/
> > > https://patchwork.ozlabs.org/patch/867949/
> > > https://patchwork.ozlabs.org/patch/867950/
> > > https://patchwork.ozlabs.org/patch/867951/
> > > https://patchwork.ozlabs.org/patch/867952/
> > > https://patchwork.ozlabs.org/patch/867953/
> > > https://patchwork.ozlabs.org/patch/867954/
> > > https://patchwork.ozlabs.org/patch/867955/
> > > https://patchwork.ozlabs.org/patch/867956/
> > > https://patchwork.ozlabs.org/patch/867957/
> > > https://patchwork.ozlabs.org/patch/867958/
> > > https://patchwork.ozlabs.org/patch/867959/
> > >
> > > There is no clean upstream target yet since kernel patch is still in
> > > RFC stage, The purpose of the patchset is just for anyone that want
> > > to eveluate af_xdp with DPDK application and get feedback for
> > > further improvement.
> > >
> > > To try with the new PMD
> > > 1. compile and install the kernel with above patches applied.
> > > 2. configure $LINUX_HEADER_DIR (dir of "make headers_install")
> > > and $TOOLS_DIR (dir at <kernel_src>/tools) at
> > driver/net/af_xdp/Makefile
> > > before compile DPDK.
> > > 3. make sure libelf and libbpf is installed.
> > >
> > > BTW, performance test shows our PMD can reach 94%~98% of the orignal
> > > benchmark when share memory is enabled.
> >
> > Hi:
> >
> > Looks like zero copy is not used in this series. Any plan to support that?
>
> Zero copy is enabled in patch 5, if a mempool passed check_mempool, it will
> be registered to af_xdp socket.
> so there will be no memcpy between mbuf and af_xdp.
>
> > If not, what's the advantage compared to vhost-net + tap + XDP_REDIRECT?
> >
> > Have you measured l2fwd performance in this case? I believe the number
> > you refer here is rxdrop (XDP_DRV) which is 11.6Mpps.
>
> Actually we measure the performance on rxonly / txonly / l2fwd on i40e with
> XDP_SKB and XDP_DRV_ZC
>
> Regards
> Qi
>
> >
> > Thanks
next prev parent reply other threads:[~2018-03-01 4:20 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-27 9:32 Qi Zhang
2018-02-27 9:33 ` [dpdk-dev] [RFC 1/7] net/af_xdp: new PMD driver Qi Zhang
2018-02-28 23:40 ` Stephen Hemminger
2018-02-28 23:42 ` Stephen Hemminger
2018-03-01 1:51 ` Zhang, Qi Z
2018-02-28 23:42 ` Stephen Hemminger
2018-02-28 23:45 ` Stephen Hemminger
2018-03-01 1:59 ` Zhang, Qi Z
2018-02-27 9:33 ` [dpdk-dev] [RFC 2/7] lib/mbuf: enable parse flags when create mempool Qi Zhang
2018-02-27 9:33 ` [dpdk-dev] [RFC 3/7] lib/mempool: allow page size aligned mempool Qi Zhang
2018-02-27 9:33 ` [dpdk-dev] [RFC 4/7] net/af_xdp: use mbuf mempool for buffer management Qi Zhang
2018-03-01 2:08 ` Stephen Hemminger
2018-02-27 9:33 ` [dpdk-dev] [RFC 5/7] net/af_xdp: enable share mempool Qi Zhang
2018-02-27 9:33 ` [dpdk-dev] [RFC 6/7] net/af_xdp: load BPF file Qi Zhang
2018-03-01 2:10 ` Stephen Hemminger
2018-02-27 9:33 ` [dpdk-dev] [RFC 7/7] app/testpmd: enable parameter for mempool flags Qi Zhang
2018-03-01 2:52 ` [dpdk-dev] [RFC 0/7] PMD driver for AF_XDP Jason Wang
2018-03-01 4:18 ` Zhang, Qi Z
2018-03-01 4:20 ` Zhang, Qi Z [this message]
2018-03-01 7:46 ` Jason Wang
2018-03-01 12:56 ` Zhang, Qi Z
2018-03-01 13:18 ` Jason Wang
2018-03-02 4:05 ` Zhang, Qi Z
2018-02-27 9:35 Qi Zhang
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