From owner-freebsd-hackers Wed Dec 19 2:37:24 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from aragorn.ics.muni.cz (aragorn.ics.muni.cz [147.251.4.33]) by hub.freebsd.org (Postfix) with ESMTP id A54F237B43D for ; Wed, 19 Dec 2001 02:37:13 -0800 (PST) Received: from dior.ics.muni.cz (dior.ics.muni.cz [147.251.6.10]) by aragorn.ics.muni.cz (8.8.5/8.8.5) with ESMTP id LAA25038; Wed, 19 Dec 2001 11:37:11 +0100 (MET) Received: from kloboucek (root@localhost) (authenticated as hopet with LOGIN) by dior.ics.muni.cz (8.10.1/8.10.0.Beta12) with ESMTP id fBJAb9b28467; Wed, 19 Dec 2001 11:37:10 +0100 (MET) From: "Petr Holub" To: "Christian Kratzer" Cc: Subject: RE: tx driver Date: Wed, 19 Dec 2001 11:36:13 +0100 Message-ID: <001b01c18878$fb3f7ea0$2603fb93@kloboucek> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-2" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook 8.5, Build 4.71.2377.0 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4522.1200 In-Reply-To: Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Hi! I'd like to apologize for my cross-posting: if there is some following debate I'd like to move it to freebsd-hackers. > the usual problem with this kind of performance with any driver > is failed full/half duplex negotiation. Please try manually forcing your > card to half or full duplex > > Add one of > -mediaopt full-duplex > or > -mediaopt half-duplex > > depending on the setting of your switch to your ifconfig line in /etc/rc.conf > > This is the single most common cause of really low ethernet performance. > I have had good experiences with the tx driver on 4.3 ond 4.4 releases. Well - this is the answer I got from almost everybody. My answer for this is: no, it's not about the duplex problems :-(. I should have describe those problems in more detailed way: - this is not general behavior: the card gets about 11,6 MBps throughput using netperf tests - this problem arises in quite obscure conditions: - either on routers (FreeBSD machine with this SMC card is acting as PC router) where the network load rises over certain values (but this is hard to simulate :-( ) - when I check out large CVS tree on my own machine with this card: the symptoms here are 1) rather fast start 2) then it gradually reduces speed (even much less than mentioned 200 kBps - it decreases to few kBps) 3) end up with overall run time more than 10x higher than it is on all other comparable machines :-( So - is there anybody experiencing similar problems? Best regards and thanks, Petr ================================================================ Petr Holub CESNET z.s.p.o. Supercomputing Center Brno Zikova 2 Institute of Compt. Science 10200 Praha, CZ Masaryk University Czech Republic Botanicka 68a, 60200 Brno, CZ e-mail: Petr.Holub@cesnet.cz phone: +420-5-41512278 e-mail: hopet@ics.muni.cz To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message