From: "Michael S. Tsirkin" <mst@redhat.com>
To: Shirley Ma <mashirle@us.ibm.com>
Cc: Arnd Bergmann <arnd@arndb.de>, Avi Kivity <avi@redhat.com>,
"Xin, Xiaohui" <xiaohui.xin@intel.com>,
David Miller <davem@davemloft.net>,
netdev@vger.kernel.org, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH 2/2] macvtap: TX zero copy between guest and host kernel
Date: Wed, 15 Sep 2010 07:12:41 +0200 [thread overview]
Message-ID: <20100915051241.GA25340@redhat.com> (raw)
In-Reply-To: <1284492983.13351.95.camel@localhost.localdomain>
On Tue, Sep 14, 2010 at 12:36:23PM -0700, Shirley Ma wrote:
> On Tue, 2010-09-14 at 21:01 +0200, Michael S. Tsirkin wrote:
> > > > I think that you should be able to simply combine
> > > > the two drivers together, add an ioctl to
> > > > enable/disable zero copy mode of operation.
> > >
> > > That could work. But what's the purpose to have two drivers if one
> > > driver can handle it?
> > >
> > > Thanks
> > > Shirley
> >
> > This was just an idea: I thought it's a good way for people interested
> > in this zero copy thing to combine forces and avoid making
> > the same mistakes, but it's not a must of course.
>
> Ok, I will make a simple patch by reusing Xiaohui's some vhost code on
> handling vhost_add_used_and_signal() to see any performance changes.
>
> The interesting thing here when I run 32 instances netperf/netserver I
> didn't see any issue w/i this patch.
>
> Thanks
> Shirley
Yes, I agree this patch is useful for demo purposes:
simple, and shows what kind of performance gains
we can expect for TX.
--
MST
next prev parent reply other threads:[~2010-09-15 5:18 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-13 20:43 [RFC PATCH 0/1] macvtap TX zero copy between guest and host kernel Shirley Ma
2010-09-13 20:47 ` RFC PATCH 1/2] macvtap: A new sock zero copy flag Shirley Ma
2010-09-13 20:48 ` [RFC PATCH 2/2] macvtap: TX zero copy between guest and host kernel Shirley Ma
2010-09-14 3:17 ` David Miller
2010-09-14 9:12 ` Avi Kivity
2010-09-14 15:05 ` Shirley Ma
2010-09-14 15:21 ` Arnd Bergmann
2010-09-14 15:22 ` Michael S. Tsirkin
2010-09-14 16:00 ` Shirley Ma
2010-09-14 16:29 ` Michael S. Tsirkin
2010-09-14 17:02 ` Shirley Ma
2010-09-14 18:27 ` Michael S. Tsirkin
2010-09-14 18:49 ` Shirley Ma
2010-09-14 19:01 ` Michael S. Tsirkin
2010-09-14 19:20 ` Shirley Ma
2010-09-15 5:31 ` Michael S. Tsirkin
2010-09-14 19:36 ` Shirley Ma
2010-09-15 5:12 ` Michael S. Tsirkin [this message]
2010-09-15 6:21 ` Shirley Ma
2010-09-15 10:10 ` Michael S. Tsirkin
2010-09-15 14:52 ` Shirley Ma
2010-09-15 15:04 ` Michael S. Tsirkin
2010-09-15 15:39 ` Michael S. Tsirkin
2010-09-15 17:00 ` Shirley Ma
2010-09-15 17:30 ` Michael S. Tsirkin
2010-09-15 18:48 ` Shirley Ma
2010-09-29 3:24 ` Shirley Ma
2010-09-29 8:16 ` Michael S. Tsirkin
2010-09-29 8:28 ` Michael S. Tsirkin
2010-09-29 14:33 ` Shirley Ma
2010-09-29 14:56 ` Shirley Ma
2010-09-29 14:31 ` Shirley Ma
2010-09-29 14:37 ` Shirley Ma
2010-09-29 15:14 ` Michael S. Tsirkin
2010-09-29 15:23 ` Shirley Ma
2010-09-15 2:46 ` Xin, Xiaohui
2010-09-15 9:58 ` Michael S. Tsirkin
2010-09-16 8:18 ` Xin, Xiaohui
2010-09-16 10:02 ` Michael S. Tsirkin
2010-09-15 1:56 ` Xin, Xiaohui
2010-09-15 1:50 ` Xin, Xiaohui
2010-09-15 2:40 ` Shirley Ma
2010-09-15 2:55 ` Xin, Xiaohui
2010-09-15 5:27 ` Michael S. Tsirkin
2010-09-15 6:17 ` Shirley Ma
2010-09-14 12:05 ` [RFC PATCH 0/1] macvtap " Michael S. Tsirkin
2010-09-14 15:15 ` Shirley Ma
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