From: "Michael S. Tsirkin" <mst@redhat.com>
To: "Zhangjie (HZ)" <zhangjie14@huawei.com>
Cc: "jasowang@redhat.com" <jasowang@redhat.com>,
Qinchuanyu <qinchuanyu@huawei.com>,
Liuyongan <liuyongan@huawei.com>,
"kvm@vger.kernel.org" <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
Date: Thu, 24 Apr 2014 14:44:57 +0300 [thread overview]
Message-ID: <20140424114457.GB16979@redhat.com> (raw)
In-Reply-To: <60A73B7A161A82449A7DB7B382BFD15537026EF3@SZXEMA504-MBS.china.huawei.com>
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
>
>
>
next parent reply other threads:[~2014-04-24 11:44 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <60A73B7A161A82449A7DB7B382BFD15537026EF3@SZXEMA504-MBS.china.huawei.com>
2014-04-24 11:44 ` Michael S. Tsirkin [this message]
2014-04-24 11:50 ` Change dev->needed_headroom of virtio_net to make Patch"virtio-net: put virtio net header inline with data"work better Zhangjie (HZ)
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