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 10:04 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]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20140820100520.GA16698@redhat.com \
--to=mst@redhat.com \
--cc=davem@davemloft.net \
--cc=jasowang@redhat.com \
--cc=kvm@vger.kernel.org \
--cc=liuyongan@huawei.com \
--cc=netdev@vger.kernel.org \
--cc=qinchuanyu@huawei.com \
--cc=zhangjie14@huawei.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
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).