netdev - Re: Interpreting perf stat on netperf and netserver

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Message-ID: <4F1859CA.6000407@hp.com>
Date:	Thu, 19 Jan 2012 09:58:34 -0800
From:	Rick Jones <rick.jones2@...com>
To:	Jean-Michel Hautbois <jhautbois@...il.com>
CC:	netdev@...r.kernel.org
Subject: Re: Interpreting perf stat on netperf and netserver

On 01/19/2012 12:29 AM, Jean-Michel Hautbois wrote:
> 2012/1/18 Rick Jones<rick.jones2@...com>:
>> On 01/18/2012 03:33 AM, Jean-Michel Hautbois wrote:
>>>
>>> Hi all,
>>>
>>> I am currently using netperf/netserver in order to characterize a
>>> benet emulex network device on a machine with 2 Xeon5670.
>>> I am using the latest linux kernel from git (3.2.0+).
>>> I am facing several issues, and I am trying to understand the
>>> following perf stat launched on netserver :
>>>
>>>   Performance counter stats for process id '5043':
>>
>>
>> If you aren't already you may want to gather system-wide data as well - not
>> everything networking is guaranteed to run in the netserver's (or netperf's)
>> context.
>>
>> Might also be good to include the netperf command line driving that
>> netserver.  That will help folks know if the netserver is receiving data
>> (_STREAM), sending data (_MAERTS) or both (_RR) (though perhaps that can be
>> gleaned from the routine names in the profile.
>
> Well, I am only launching netserver without any parameter.

The netperf command line, not netserver :)  The netperf command line 
will tell us what the netserver was asked to and was presumably doing at 
the time the profile was taken.

happy benchmarking,

rick
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