From: Jason Wang <jasowang@redhat.com>
To: "Zhang, Qi Z" <qi.z.zhang@intel.com>
Cc: "Karlsson, Magnus" <magnus.karlsson@intel.com>,
"Topel, Bjorn" <bjorn.topel@intel.com>,
"dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [RFC 0/7] PMD driver for AF_XDP
Date: Thu, 1 Mar 2018 21:18:01 +0800 [thread overview]
Message-ID: <23b8bd50-cf2a-fce1-dc0a-20a52d33cf77@redhat.com> (raw)
In-Reply-To: <039ED4275CED7440929022BC67E706115315D771@SHSMSX103.ccr.corp.intel.com>
On 2018年03月01日 20:56, Zhang, Qi Z wrote:
>>>>>> 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.
>> Aha, I see. So the zerocopy was limited to some specific use case. And if I
>> understand it correctly, zc mode could not be used for VM.
> I think except the limitation for mempool layout, zerocopy is transparent to DPDK application, only difference is performance.
> Sorry, I may not get your point, if you could explain more about the VM usage.
>
> Regards
> Qi
No problem, so the question is:
Can zerocopy be used when using testpmd to foward packets between
vhost-user and AF_XDP socket?
Thanks
next prev parent reply other threads:[~2018-03-01 13:18 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
2018-03-01 7:46 ` Jason Wang
2018-03-01 12:56 ` Zhang, Qi Z
2018-03-01 13:18 ` Jason Wang [this message]
2018-03-02 4:05 ` Zhang, Qi Z
2018-02-27 9:35 Qi Zhang
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