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From: Rusty Russell <rusty@rustcorp.com.au>
To: Stefan Hajnoczi <stefanha@gmail.com>
Cc: kvm <kvm@vger.kernel.org>, "Michael S. Tsirkin" <mst@redhat.com>,
	netdev@vger.kernel.org, qemu-devel <qemu-devel@nongnu.org>,
	Linux Virtualization <virtualization@lists.linux-foundation.org>,
	herbert@gondor.hengli.com.au,
	Anthony Liguori <anthony@codemonkey.ws>
Subject: Re: updated: kvm networking todo wiki
Date: Thu, 30 May 2013 16:48:29 +0930	[thread overview]
Message-ID: <87fvx5kkai.fsf@rustcorp.com.au> (raw)
In-Reply-To: <CAJSP0QWY3z_oGaHNwR0=whYgnDCiGLBC+3Z5oM0x5nwN1RQVqg@mail.gmail.com>

Stefan Hajnoczi <stefanha@gmail.com> writes:
> On Thu, May 30, 2013 at 7:23 AM, Rusty Russell <rusty@rustcorp.com.au> wrote:
>> On the receive side, what can we do better than readv?  If we need to
>> return to userspace to tell the guest that we've got a new packet, we
>> don't win on latency.  We might reduce syscall overhead with a
>> multi-dimensional readv to read multiple packets at once?
>
> Sounds like recvmmsg(2).

Wow... the future is here, today!

Thanks,
Rusty.

WARNING: multiple messages have this Message-ID (diff)
From: Rusty Russell <rusty@rustcorp.com.au>
To: Stefan Hajnoczi <stefanha@gmail.com>
Cc: kvm <kvm@vger.kernel.org>, "Michael S. Tsirkin" <mst@redhat.com>,
	netdev@vger.kernel.org, Jason Wang <jasowang@redhat.com>,
	qemu-devel <qemu-devel@nongnu.org>,
	Linux Virtualization <virtualization@lists.linux-foundation.org>,
	herbert@gondor.hengli.com.au,
	Anthony Liguori <anthony@codemonkey.ws>,
	Dmitry Fleytman <dmitry@daynix.com>
Subject: Re: [Qemu-devel] updated: kvm networking todo wiki
Date: Thu, 30 May 2013 16:48:29 +0930	[thread overview]
Message-ID: <87fvx5kkai.fsf@rustcorp.com.au> (raw)
In-Reply-To: <CAJSP0QWY3z_oGaHNwR0=whYgnDCiGLBC+3Z5oM0x5nwN1RQVqg@mail.gmail.com>

Stefan Hajnoczi <stefanha@gmail.com> writes:
> On Thu, May 30, 2013 at 7:23 AM, Rusty Russell <rusty@rustcorp.com.au> wrote:
>> On the receive side, what can we do better than readv?  If we need to
>> return to userspace to tell the guest that we've got a new packet, we
>> don't win on latency.  We might reduce syscall overhead with a
>> multi-dimensional readv to read multiple packets at once?
>
> Sounds like recvmmsg(2).

Wow... the future is here, today!

Thanks,
Rusty.

  reply	other threads:[~2013-05-30  7:18 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-05-23  8:50 updated: kvm networking todo wiki Michael S. Tsirkin
2013-05-23  8:50 ` [Qemu-devel] " Michael S. Tsirkin
2013-05-23 14:12 ` Lucas Meneghel Rodrigues
2013-05-23 14:12 ` Lucas Meneghel Rodrigues
2013-05-23 14:12   ` [Qemu-devel] " Lucas Meneghel Rodrigues
2013-05-24  9:41 ` Jason Wang
2013-05-24  9:41   ` [Qemu-devel] " Jason Wang
2013-05-24 11:35   ` Michael S. Tsirkin
2013-05-24 11:35     ` [Qemu-devel] " Michael S. Tsirkin
2013-05-24 13:47     ` Anthony Liguori
2013-05-24 13:47     ` Anthony Liguori
2013-05-24 13:47       ` [Qemu-devel] " Anthony Liguori
2013-05-24 14:00       ` Michael S. Tsirkin
2013-05-24 14:00         ` [Qemu-devel] " Michael S. Tsirkin
2013-05-29  0:07         ` Rusty Russell
2013-05-29  0:07         ` Rusty Russell
2013-05-29  0:07           ` [Qemu-devel] " Rusty Russell
2013-05-29 13:01           ` Anthony Liguori
2013-05-29 13:01             ` [Qemu-devel] " Anthony Liguori
2013-05-29 14:12             ` Michael S. Tsirkin
2013-05-29 14:12               ` [Qemu-devel] " Michael S. Tsirkin
2013-05-30  5:23             ` Rusty Russell
2013-05-30  5:23             ` Rusty Russell
2013-05-30  5:23               ` [Qemu-devel] " Rusty Russell
2013-05-30  6:38               ` Stefan Hajnoczi
2013-05-30  6:38                 ` [Qemu-devel] " Stefan Hajnoczi
2013-05-30  7:18                 ` Rusty Russell [this message]
2013-05-30  7:18                   ` Rusty Russell
2013-05-30 13:40                 ` Anthony Liguori
2013-05-30 13:40                   ` [Qemu-devel] " Anthony Liguori
2013-05-30 13:44                   ` Michael S. Tsirkin
2013-05-30 13:44                     ` [Qemu-devel] " Michael S. Tsirkin
2013-05-30 14:41                     ` Anthony Liguori
2013-05-30 14:41                       ` [Qemu-devel] " Anthony Liguori
2013-06-03  0:32                       ` Rusty Russell
2013-06-03  0:32                         ` [Qemu-devel] " Rusty Russell
2013-05-30  6:38               ` Stefan Hajnoczi
2013-05-30 13:39               ` Anthony Liguori
2013-05-30 13:39                 ` [Qemu-devel] " Anthony Liguori
2013-05-30 13:39               ` Anthony Liguori

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