linux-kernel - Re: [PATCH net-next V2 0/3] rx busy polling support for virtio-net

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Date:	Wed, 16 Jul 2014 23:21:16 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	jasowang@...hat.com
Cc:	rusty@...tcorp.com.au, mst@...hat.com,
	virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next V2 0/3] rx busy polling support for virtio-net 

From: Jason Wang <jasowang@...hat.com>
Date: Wed, 16 Jul 2014 14:21:44 +0800

> Hi all:
> 
> This series introduces the support for rx busy polling support. This
> was useful for reduing the latency for a kvm guest. Patch 1-2
> introduces helpers which is used for rx busy polling. Patch 3
> implement the main function.
> 
> Test was done between a kvm guest and an external host. Two hosts were
> connected through 40gb mlx4 cards. With both busy_poll and busy_read are
> set to 50 in guest, 1 byte netperf tcp_rr shows 116% improvement:
> transaction rate was increased from 9151.94 to 19787.37.
> 
> Changes from V1:
> - split the patch info smaller ones
> - add more details about test setup/configuration
> 
> Please review.

Looks like you can make some minor adjustments based upon review, and
anyways I'd like to wait for Michael to get back and review a change
of this nature.

Thanks.
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