From owner-freebsd-stable@FreeBSD.ORG Fri May 27 19:38:31 2005 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 994AF16A41C for ; Fri, 27 May 2005 19:38:31 +0000 (GMT) (envelope-from avleeuwen@gmail.com) Received: from zproxy.gmail.com (zproxy.gmail.com [64.233.162.204]) by mx1.FreeBSD.org (Postfix) with ESMTP id 40F7143D1D for ; Fri, 27 May 2005 19:38:31 +0000 (GMT) (envelope-from avleeuwen@gmail.com) Received: by zproxy.gmail.com with SMTP id 12so582647nzp for ; Fri, 27 May 2005 12:38:30 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=R+DoszJrTEkdxFM7Uz3IRcz4Y6uiHaZOAbgsv2yH12f8HIGjYT+Oin4hwhDHyULsRvL2xqto3uiYzNIIek09ANFkYi6EqayODcTSJKJIqxY44uf3+nx4ozDq7bhJDghQIdNVZves+/MK31ZymEdQPdATLQDrKUhYgvT1/Q/6H94= Received: by 10.36.159.14 with SMTP id h14mr492314nze; Fri, 27 May 2005 12:38:30 -0700 (PDT) Received: by 10.36.79.12 with HTTP; Fri, 27 May 2005 12:38:30 -0700 (PDT) Message-ID: Date: Fri, 27 May 2005 21:38:30 +0200 From: Arjan Van Leeuwen To: Matthias Buelow In-Reply-To: <4295153A.9010605@incubus.de> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline References: <84dead7205052420503fded0e9@mail.gmail.com> <20050525050943.GA64320@xor.obsecurity.org> <42940A81.1030801@incubus.de> <20050525052214.GA76339@xor.obsecurity.org> <42940C87.5000705@incubus.de> <20050525053054.GA76491@xor.obsecurity.org> <4294AB75.9080908@incubus.de> <20050525185427.GB92006@xor.obsecurity.org> <4294CC9A.1000200@incubus.de> <4295153A.9010605@incubus.de> Cc: freebsd-stable@freebsd.org, Kris Kennaway Subject: Re: Performance of 4.x vs 5.x (Re: Lifetime of FreeBSD branches) X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Arjan Van Leeuwen List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 27 May 2005 19:38:31 -0000 On 5/26/05, Matthias Buelow wrote: >=20 > >> Others don't see this though, and in other cases it was *definitively > >> proven* to be caused by the issue I mentioned. I'll have to think > >> more about what to try next..thanks for running the tests. > > > > Perhaps it's something SATA-related? >=20 > Before restoring my 5.4 dumps after testing -current, I installed > fedora3 linux just to verify it isn't somehow the hardware itself. Ok, > plain installation from CDs, kernel "2.6.9-1.667smp" (default > installation kernel). There was absolutely zero noticable lag or any > effect on response time on X11 while untarring the same firefox source. > So there really seems to be something foul in FreeBSD in that regard. > And now for the dumps.. *sigh*. I have the same problem (and have had it for a long time) on both my dual Xeon 550MHz and Athlon XP 2000+ machines. I'm running 6-CURRENT (perhaps this thread should move to the -CURRENT list). I'm working on the dual Xeon right now, so here are some data points from that machine: - I only see it when there is heavy file activity, for example untarring firefox or untarring X. Probably because these have a lot of small files. - I do not see it when compiling world or doing other compiles - I don't have any shared irqs. - I don't have an excessive amount of interrupts, not on the USB irq nor on any other irq channels. I think I remember someone (Scott? Jeff? Don Lewis?) mentioning the problem on another mailing list, and noting that it is a problem with the filesystem that is difficult to fix. I'll try to find that post. Arjan