netdev - Re: [net] b58537a1f56: +89.2% netperf.Throughput

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Message-ID: <53A1F8D9.7070704@redhat.com>
Date:	Wed, 18 Jun 2014 22:38:49 +0200
From:	Daniel Borkmann <dborkman@...hat.com>
To:	David Rientjes <rientjes@...gle.com>
CC:	Jet Chen <jet.chen@...el.com>, LKML <linux-kernel@...r.kernel.org>,
	netdev <netdev@...r.kernel.org>, lkp@...org,
	Fengguang Wu <fengguang.wu@...el.com>
Subject: Re: [net] b58537a1f56: +89.2% netperf.Throughput_Mbps

On 06/18/2014 10:29 PM, David Rientjes wrote:
> On Wed, 18 Jun 2014, Jet Chen wrote:
>
>> Hi Daniel,
>>
>> FYI, we noticed the below changes on
>>
>> commit b58537a1f5629bdc98a8b9dc2051ce0e952f6b4b ("net: sctp: fix permissions
>> for rto_alpha and rto_beta knobs")
>
> There's no way this is legitimate, that commit cannot possibly affect the
> performance of netperf.  I wouldn't bother to spend any time investigating
> this.

One assumption could be that netperf was setting this knob
internally and ignoring the result of it (error/success), but
that we might need to look up in netperf source to confirm.

Cheers,

Daniel
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