From: Stephen Hemminger <shemminger@vyatta.com>
To: Rusty Russell <rusty@rustcorp.com.au>
Cc: virtualization@lists.linux-foundation.org, "Xin,
Xiaohui" <xiaohui.xin@intel.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"mst@redhat.com" <mst@redhat.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"hpa@zytor.com" <hpa@zytor.com>, "mingo@elte.hu" <mingo@elte.hu>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>
Subject: Re: [RFC] Virtual Machine Device Queues(VMDq) support on KVM
Date: Mon, 21 Sep 2009 09:21:30 -0700 [thread overview]
Message-ID: <20090921092130.30984dbd@s6510> (raw)
In-Reply-To: <200909211637.23299.rusty@rustcorp.com.au>
On Mon, 21 Sep 2009 16:37:22 +0930
Rusty Russell <rusty@rustcorp.com.au> wrote:
> > > Actually this framework can apply to traditional network adapters which have
> > > just one tx/rx queue pair. And applications using the same user/kernel interface
> > > can utilize this framework to send/receive network traffic directly thru a tx/rx
> > > queue pair in a network adapter.
> > >
More importantly, when virtualizations is used with multi-queue NIC's the virtio-net
NIC is a single CPU bottleneck. The virtio-net NIC should preserve the parallelism (lock
free) using multiple receive/transmit queues. The number of queues should equal the
number of CPUs.
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next prev parent reply other threads:[~2009-09-21 16:21 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <C85CEDA13AB1CF4D9D597824A86D2B9006AEB94861@PDSMSX501.ccr.corp.intel.com>
2009-09-01 16:05 ` [RFC] Virtual Machine Device Queues(VMDq) support on KVM Stephen Hemminger
2009-09-02 6:45 ` Xin, Xiaohui
2009-09-21 7:07 ` Rusty Russell
2009-09-21 16:21 ` Stephen Hemminger [this message]
2009-09-21 16:27 ` Chris Wright
2009-09-22 10:38 ` Michael S. Tsirkin
2009-09-22 11:50 ` Arnd Bergmann
2009-09-22 16:29 ` Stephen Hemminger
2009-09-22 18:34 ` Arnd Bergmann
2009-09-01 6:58 Xin, Xiaohui
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