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Message-ID: <20090921092130.30984dbd@s6510> Date: Mon, 21 Sep 2009 09:21:30 -0700 From: Stephen Hemminger <shemminger@...tta.com> To: Rusty Russell <rusty@...tcorp.com.au> Cc: virtualization@...ts.linux-foundation.org, "Xin, Xiaohui" <xiaohui.xin@...el.com>, "kvm@...r.kernel.org" <kvm@...r.kernel.org>, "mst@...hat.com" <mst@...hat.com>, "netdev@...r.kernel.org" <netdev@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "linux-mm@...ck.org" <linux-mm@...ck.org>, "hpa@...or.com" <hpa@...or.com>, "mingo@...e.hu" <mingo@...e.hu>, "akpm@...ux-foundation.org" <akpm@...ux-foundation.org> Subject: Re: [RFC] Virtual Machine Device Queues(VMDq) support on KVM On Mon, 21 Sep 2009 16:37:22 +0930 Rusty Russell <rusty@...tcorp.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. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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