From owner-freebsd-current@FreeBSD.ORG Fri Oct 5 20:23:01 2007 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 24DF516A46C for ; Fri, 5 Oct 2007 20:23:01 +0000 (UTC) (envelope-from jfvogel@gmail.com) Received: from nf-out-0910.google.com (nf-out-0910.google.com [64.233.182.190]) by mx1.freebsd.org (Postfix) with ESMTP id A5A5F13C45D for ; Fri, 5 Oct 2007 20:23:00 +0000 (UTC) (envelope-from jfvogel@gmail.com) Received: by nf-out-0910.google.com with SMTP id b2so536109nfb for ; Fri, 05 Oct 2007 13:22:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; bh=o1w+Uny8hLmgYBmvrbqsv5Da7iME63YJjRABibjprSw=; b=AlDEWsOwBxJIpVDVcEkEOwZBxQ69G970Y96/gbzd5QXzHWCQODZ53UA2k/X+35c4Ari1F1zlDiV0inTPTGHwUIqZTbpDYaljfxTU2XMNtTN+1tmj/t1xzZ51ooswdxAm7LWW2ThsSUvKs4DXoeEUFsR4UOodoOw2ebRW5B7ejtw= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=kbk+Hbc3WICXpCRekWpf4ATLnAMh3BO2tdfwWlMoj8WiWL7S3ZOkB6ee6MRwe1AVVRff4p0nnegj5KZzWRHJ0d6znH1yMk95ZigmiEp/0Yj27trj/f8DIb+SFSFJ1n5UW9JCUjWjQlqlDnagwkRsbKvd0YqhNH3o9G0gQ9EXuyM= Received: by 10.86.80.5 with SMTP id d5mr2756053fgb.1191615779556; Fri, 05 Oct 2007 13:22:59 -0700 (PDT) Received: by 10.86.100.19 with HTTP; Fri, 5 Oct 2007 13:22:59 -0700 (PDT) Message-ID: <2a41acea0710051322w214cb284x68d8bad3c4edcdc1@mail.gmail.com> Date: Fri, 5 Oct 2007 13:22:59 -0700 From: "Jack Vogel" To: "Artem Kuchin" In-Reply-To: <012901c8078a$400faeb0$0c00a8c0@Artem> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <012901c8078a$400faeb0$0c00a8c0@Artem> Cc: freebsd-current@freebsd.org Subject: Re: TSO4 network problems and scheduler selection X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 05 Oct 2007 20:23:01 -0000 I had our test/validation group attempt to repro your problem with TSO and they were unable to do so. I do not know what hardware/config ingredients in your environment are causing a problem but something odd is going on. Test suggested something like a speed mismatch, but we don't know for sure. Right now I see no evidence to suggest that its important to disable TSO. If anyone has a scenario I can reproduce I'd be happy to look further. Jack On 10/5/07, Artem Kuchin wrote: > Hi! > > A couple of weeks ago i have written about TSO4 problems on em > network interface. The problem was that when TSO4 is enable > em stream send perfomace drop to about ZERO. (i cannot download > any file from ftp, i canont even get midnight commander to draw > a full screen in ssh client). Noone has found any solution and > it was decided that it was a bug in em driver. > > Today i have played with SCHED_ULE scheduler on this box > (it is 7-CURRENT, Pentium D). Adn accidentaly found out that > when SCHED_ULE is selected TSO4 does not cause any problems. > > My interface: > > em0: flags=8843 metric 0 mtu 1500 > options=18b > > > This is totally weird, but i'm letting everybody know it if > someone step into this problem. Viva SCHED_ULE! > > -- > Regards, > Artem > > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org" >