From owner-freebsd-stable@FreeBSD.ORG Sat Dec 1 23:15:38 2007 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 48E8816A417 for ; Sat, 1 Dec 2007 23:15:38 +0000 (UTC) (envelope-from josh.carroll@gmail.com) Received: from py-out-1112.google.com (py-out-1112.google.com [64.233.166.177]) by mx1.freebsd.org (Postfix) with ESMTP id F0FF513C44B for ; Sat, 1 Dec 2007 23:15:37 +0000 (UTC) (envelope-from josh.carroll@gmail.com) Received: by py-out-1112.google.com with SMTP id u77so5919651pyb for ; Sat, 01 Dec 2007 15:15:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:reply-to:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; bh=ieQCpXLtKRUSRqllRin3ugLfXphN6YtSWfAoLJYJQHA=; b=JKUD2qSOOA2++M2+SKH1JbAaEXB/wBhbG6TBUXr8JVEGoGBXDprmt2hguEhy3/lEyRRY0BBEI0EhsthQXaqd8TrTsxoKmpfCXGHnx0NkGtONpWXsrAgczq397u5LcYW8bD+TOwwGHojUGGBJBfOM/m1YESDjRq5SokDVMKJ3Uds= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; 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=pgqKXwkZRdQSkZ2rZkFYoJvYwaqEWXpvNP2fK2v3comyHmbIdfgXZlI7YNM7/rkuJLWXK6Ypakqw4/wzvEbCp2gHLOC9hkf/S2dmmt65Ae1er1SExdj699X1vHiGpToTkdohcA+txbd6CvxhqR7w+vDDDrRthaoCtqFTfIQM8Gs= Received: by 10.35.63.2 with SMTP id q2mr10859652pyk.1196550937340; Sat, 01 Dec 2007 15:15:37 -0800 (PST) Received: by 10.35.129.13 with HTTP; Sat, 1 Dec 2007 15:15:37 -0800 (PST) Message-ID: <8cb6106e0712011515g225f6a79h9d8fb0868c7dbe2@mail.gmail.com> Date: Sat, 1 Dec 2007 18:15:37 -0500 From: "Josh Carroll" To: "Reko Turja" In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20071201213732.GA16638@cannabis.dataforce.net> Cc: freebsd-stable@freebsd.org, Alexey Vlasov Subject: Re: 2 x quad-core system is slower that 2 x dual core on FreeBSD X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: josh.carroll@gmail.com List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 01 Dec 2007 23:15:38 -0000 > > options PAE > > One very probable culprit for slowness I'd say it IS the culprit. PAE is known to decrease performance, and this is probably 95% of the cause. > Using _ULE might yield a bit more performance as well Yes, in 7.0-BETA3 I'm seeing a 7% increase in performance (sysbench with 8 threads on a 4-core system) with ULE over 4BSD. Both great suggestions. If he needs the high memory support, I would test without PAE just to test the performance (along with changing to the ULE scheduler), then rebuild the system later with amd64 so he doesn't have to use the PAE hack. Regards, Josh