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From: Bruce Allen <ballen@gravity.phys.uwm.edu>
To: Bill Fink <billfink@mindspring.com>
Cc: SANGTAE HA <sangtae.ha@gmail.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	netdev@vger.kernel.org,
	Stephen Hemminger <shemminger@linux-foundation.org>
Subject: Re: e1000 full-duplex TCP performance well below wire speed
Date: Thu, 31 Jan 2008 13:37:32 -0600 (CST)	[thread overview]
Message-ID: <Pine.LNX.4.63.0801311328030.14403@trinity.phys.uwm.edu> (raw)
In-Reply-To: <20080131123627.599be68f.billfink@mindspring.com>

Hi Bill,

>>> I see similar results on my test systems
>>
>> Thanks for this report and for confirming our observations.  Could you
>> please confirm that a single-port bidrectional UDP link runs at wire
>> speed?  This helps to localize the problem to the TCP stack or interaction
>> of the TCP stack with the e1000 driver and hardware.
>
> Yes, a single-port bidirectional UDP test gets full GigE line rate
> in both directions with no packet loss.

Thanks for confirming this.  And thanks also for nuttcp!  I just 
recognized you as the author.

Cheers,
 	Bruce

  reply	other threads:[~2008-01-31 19:37 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-01-30  9:51 Bruce Allen
2008-01-30 13:18 ` Andi Kleen
2008-01-30 13:38   ` Bruce Allen
2008-01-30 14:08     ` David Miller
2008-01-30 13:53 ` David Miller
2008-01-30 14:01   ` Bruce Allen
2008-01-30 16:21     ` Stephen Hemminger
2008-01-30 22:25       ` Bruce Allen
2008-01-30 22:33         ` Stephen Hemminger
2008-01-30 23:23           ` Bruce Allen
2008-01-31  0:17         ` SANGTAE HA
2008-01-31  8:52           ` Bruce Allen
2008-01-31 11:45           ` Bill Fink
2008-01-31 14:50             ` David Acker
2008-01-31 15:57               ` Bruce Allen
2008-01-31 15:54             ` Bruce Allen
2008-01-31 17:36               ` Bill Fink
2008-01-31 19:37                 ` Bruce Allen [this message]
2008-01-31 18:26             ` Brandeburg, Jesse

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