* Re: Change dev->needed_headroom of virtio_net to make Patch"virtio-net: put virtio net header inline with data"work better [not found] <60A73B7A161A82449A7DB7B382BFD15537026EF3@SZXEMA504-MBS.china.huawei.com> @ 2014-04-24 11:44 ` Michael S. Tsirkin 2014-04-24 11:50 ` Zhangjie (HZ) 0 siblings, 1 reply; 2+ messages in thread From: Michael S. Tsirkin @ 2014-04-24 11:44 UTC (permalink / raw) To: Zhangjie (HZ) Cc: jasowang@redhat.com, Qinchuanyu, Liuyongan, kvm@vger.kernel.org, netdev On Thu, Apr 24, 2014 at 10:19:58AM +0000, Zhangjie (HZ) wrote: > Hi! > > Patch “virtio-net: put virtio net header inline with data” , has a notable > improvement for TCP packages. > > But UDP packages from virtio_net nic, do not have enough head room. I wonder if > we can set dev->needed_headroom > > to the size of virtio net header, so as to put the header in. By doing this, > udp get about 5% improvement in bandwidth. Sounds like a reasonable thing to do. Want to post the patch so people can try it out? > > > -- > > Thanks, > > //Zhang Jie > > > ^ permalink raw reply [flat|nested] 2+ messages in thread
* RE: Change dev->needed_headroom of virtio_net to make Patch"virtio-net: put virtio net header inline with data"work better 2014-04-24 11:44 ` Change dev->needed_headroom of virtio_net to make Patch"virtio-net: put virtio net header inline with data"work better Michael S. Tsirkin @ 2014-04-24 11:50 ` Zhangjie (HZ) 0 siblings, 0 replies; 2+ messages in thread From: Zhangjie (HZ) @ 2014-04-24 11:50 UTC (permalink / raw) To: Michael S. Tsirkin Cc: jasowang@redhat.com, Qinchuanyu, Liuyongan, kvm@vger.kernel.org, netdev@vger.kernel.org Thank you very much! I will post a patch tomorrow. --Best wishes! //Zhang Jie -----Original Message----- From: Michael S. Tsirkin [mailto:mst@redhat.com] Sent: Thursday, April 24, 2014 7:45 PM To: Zhangjie (HZ) Cc: jasowang@redhat.com; Qinchuanyu; Liuyongan; kvm@vger.kernel.org; netdev@vger.kernel.org Subject: Re: Change dev->needed_headroom of virtio_net to make Patch"virtio-net: put virtio net header inline with data"work better On Thu, Apr 24, 2014 at 10:19:58AM +0000, Zhangjie (HZ) wrote: > Hi! > > Patch “virtio-net: put virtio net header inline with data” , has a > notable improvement for TCP packages. > > But UDP packages from virtio_net nic, do not have enough head room. I > wonder if we can set dev->needed_headroom > > to the size of virtio net header, so as to put the header in. By doing > this, udp get about 5% improvement in bandwidth. Sounds like a reasonable thing to do. Want to post the patch so people can try it out? > > > -- > > Thanks, > > //Zhang Jie > > > ^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2014-04-24 11:50 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
[not found] <60A73B7A161A82449A7DB7B382BFD15537026EF3@SZXEMA504-MBS.china.huawei.com>
2014-04-24 11:44 ` Change dev->needed_headroom of virtio_net to make Patch"virtio-net: put virtio net header inline with data"work better Michael S. Tsirkin
2014-04-24 11:50 ` Zhangjie (HZ)
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for NNTP newsgroup(s).