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From: Robert Olsson <Robert.Olsson@data.slu.se>
To: "Avery Fay" <avery_fay@symantec.com>
Cc: Anton Blanchard <anton@samba.org>, linux-kernel@vger.kernel.org
Subject: Re: Gigabit/SMP performance problem
Date: Tue, 7 Jan 2003 19:15:54 +0100	[thread overview]
Message-ID: <15899.6490.732494.523858@robur.slu.se> (raw)
In-Reply-To: <OFAB3BBE62.009CD13E-ON85256CA6.00714931-85256CA6.00718BA3@symantec.com>


Avery Fay writes:
 > Hmm. That paper is actually very interesting. I'm thinking maybe with the 
 > P4 I'm better off with only 1 cpu. WRT hyperthreading, I actually disabled > it because it make performance worse (wasn't clear in the original email).


 With 1CPU-SMP-HT I'm on UP level of performance this with forwarding two 
 single flows evenly distributes between CPU's. So HT payed the SMP cost so 
 to say.
 
 Also I tested the MB bandwidth with new threaded version of pktgen just 
 TX'ing a packets on 6 GIGE I'm seeing almost 6 Gbit/s TX'ed w 1500 bytes
 packets.

 I have problem populating all slots w. GIGE NIC's. WoL (Wake on Lan) this
 is a real pain... Seems like my adapters needs a standby current 0.8A and 
 most Power Supplies gives 2.0A for this. (Number come from SuperMicro). 
 So booting fails radomlingy. You have 8 NIC's -- Didn't you have problem?

 Anyway I'll guess profiling is needed?

 Cheers.
						--ro

  reply	other threads:[~2003-01-07 17:59 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-01-06 20:38 Avery Fay
2003-01-07 18:15 ` Robert Olsson [this message]
  -- strict thread matches above, loose matches on Subject: below --
2003-01-08 21:44 Ronciak, John
2003-01-09 12:49 ` Robert Olsson
2003-01-08 21:12 Feldman, Scott
2003-01-08 12:17 Jon Burgess
2003-01-06 20:33 Avery Fay
2003-01-06 20:29 Avery Fay
2003-01-06 21:23 ` Martin J. Bligh
2003-01-07 17:19   ` Mike Black
2003-01-06 20:25 Avery Fay
     [not found] <b8ce5e32.0301040439.7bdaa903@posting.google.com>
2003-01-06 18:27 ` Bill Davidsen
2003-01-06 19:09   ` Daniel Blueman
2003-01-06 19:26     ` Brian Tinsley
2003-01-03 20:25 Avery Fay
2003-01-03 21:19 ` Arjan van de Ven
2003-01-03 21:36 ` Martin J. Bligh
2003-01-03 22:31   ` Andrew Theurer
2003-01-03 16:12 Avery Fay
2003-01-03 18:05 ` Martin J. Bligh
2003-01-03 21:49   ` Ron cooper
2003-01-03 21:47     ` Martin J. Bligh
2003-01-03 21:20 ` Robert Olsson
2003-01-04  3:33 ` Anton Blanchard
2003-01-06 19:43 ` Jon Fraser

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