netdev - Re: [PATCH net-next] cxgb4: Add low latency socket busy

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Message-ID: <54D0FB41.1030802@hp.com>
Date:	Tue, 03 Feb 2015 08:45:53 -0800
From:	Rick Jones <rick.jones2@...com>
To:	Hariprasad Shenai <hariprasad@...lsio.com>, netdev@...r.kernel.org
CC:	davem@...emloft.net, leedom@...lsio.com, anish@...lsio.com,
	nirranjan@...lsio.com, praveenm@...lsio.com, kumaras@...lsio.com
Subject: Re: [PATCH net-next] cxgb4: Add low latency socket busy_poll support

On 02/02/2015 09:20 PM, Hariprasad Shenai wrote:
> cxgb_busy_poll, corresponding to ndo_busy_poll, gets called by the socket
> waiting for data.
>
> With busy_poll enabled, improvement is seen in latency numbers as observed by
> collecting netperf TCP_RR numbers.

Which, not surprisingly, leads to the question - how much improvement? 
:)  Extra credit for including the change in netperf-reported service 
demands.

happy benchmarking,

rick jones

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