netdev - Re: [PATCH net-next v3 0/3] Multiqueue support in virtio-net

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Date:	Fri, 07 Dec 2012 15:35:56 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	jasowang@...hat.com
Cc:	mst@...hat.com, rusty@...tcorp.com.au,
	virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, krkumar2@...ibm.com,
	kvm@...r.kernel.org, bhutchings@...arflare.com,
	jwhan@...ewood.snu.ac.kr, shiyer@...hat.com
Subject: Re: [PATCH net-next v3 0/3] Multiqueue support in virtio-net

From: Jason Wang <jasowang@...hat.com>
Date: Sat,  8 Dec 2012 01:04:54 +0800

> This series is an update version (hope the final version) of multiqueue
> (VIRTIO_NET_F_MQ) support in virtio-net driver. All previous comments were
> addressed, the work were based on Krishna Kumar's work to let virtio-net use
> multiple rx/tx queues to do the packets reception and transmission. Performance
> test show the aggregate latency were increased greately but may get some
> regression in small packet transmission. Due to this, multiqueue were disabled
> by default. If user want to benefit form the multiqueue, ethtool -L could be
> used to enable the feature.
> 
> Please review and comments.
> 
> A protype implementation of qemu-kvm support could by found in
> git://github.com/jasowang/qemu-kvm-mq.git. To start a guest with two queues, you
> could specify the queues parameters to both tap and virtio-net like:
> 
> ./qemu-kvm -netdev tap,queues=2,... -device virtio-net-pci,queues=2,...
> 
> then enable the multiqueue through ethtool by:
> 
> ethtool -L eth0 combined 2

It seems like most, if not all, of the feedback given for this series
has been addressed by Jason.

Can I get some ACKs?

Thanks.
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