From: "Michael S. Tsirkin" <mst@redhat.com>
To: "Zhangjie (HZ)" <zhangjie14@huawei.com>
Cc: Jason Wang <jasowang@redhat.com>,
netdev@vger.kernel.org, davem@davemloft.net, kvm@vger.kernel.org,
liuyongan@huawei.com, qinchuanyu@huawei.com
Subject: Re: [Questions]
Date: Wed, 20 Aug 2014 12:05:20 +0200 [thread overview]
Message-ID: <20140820100520.GA16698@redhat.com> (raw)
In-Reply-To: <53F46C3D.1030106@huawei.com>
On Wed, Aug 20, 2014 at 05:37:01PM +0800, Zhangjie (HZ) wrote:
> Hi MST,
>
> I see "reduce networking latency"
> from Networking Todo, the idea is to "allow handling short packets from softirq or VCPU context".
> If from softirq context, how could softirq copy skb to guest memory? If the method is to use mmstruct of Qemu,
> would it be expensive?
I have some very rough patches to explain this part of the idea.
Will dig them out for you.
> If from VCPU context, maybe the internal operation of the virtual machine will have a significant delay.
We'd have to find a good heuristic here.
Maybe for a small number of very short packets the delay won't be significant.
> Thanks!
> --
> Best Wishes!
> Zhang Jie
prev parent reply other threads:[~2014-08-20 10:05 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-20 9:37 [Questions] Zhangjie (HZ)
2014-08-20 10:05 ` Michael S. Tsirkin [this message]
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