From owner-freebsd-current@FreeBSD.ORG Fri Mar 4 05:37:13 2005 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 2083F16A4CE; Fri, 4 Mar 2005 05:37:13 +0000 (GMT) Received: from ylpvm29.prodigy.net (ylpvm29-ext.prodigy.net [207.115.57.60]) by mx1.FreeBSD.org (Postfix) with ESMTP id A3E1743D41; Fri, 4 Mar 2005 05:37:10 +0000 (GMT) (envelope-from nate@root.org) Received: from [10.0.5.51] (adsl-64-171-186-189.dsl.snfc21.pacbell.net [64.171.186.189])j245ajRs025858; Fri, 4 Mar 2005 00:36:45 -0500 Message-ID: <4227F401.7000204@root.org> Date: Thu, 03 Mar 2005 21:37:05 -0800 From: Nate Lawson User-Agent: Mozilla Thunderbird 1.0RC1 (X11/20041205) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Kevin Oberman References: <20050302235623.BA3925D07@ptavv.es.net> In-Reply-To: <20050302235623.BA3925D07@ptavv.es.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit cc: acpi@FreeBSD.ORG cc: current@FreeBSD.ORG Subject: Re: patch: p4tcc and speedstep cpufreq drivers X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 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, 04 Mar 2005 05:37:13 -0000 Kevin Oberman wrote: > OK. This makes me feel a bit better, but I still think I'll leave TCC > out of the equation as it makes the various frequency steps vary uneven > to the point that lowering dev.cpu.0.freq would increase performance > (and the reverse, as well) and it causes my system to hang when > throttled back too far. It never hangs with TCC disabled although my > lowest "frequency" is now just 150 MHz. Would you test with hint.acpi_throttle.0.disabled="1" instead of disabling p4tcc? I think p4tcc is not the problem, it's the combination of the two. I think there are some problems when both the chipset (externally) and processor (internally) assert STOPCLOCK. If this works for you with no hangs, I'll commit code to disable acpi_throttle when p4tcc is present. p4tcc is more efficient than acpi_throttle since the latter is done through the chipset, giving more chance for race conditions, latency, etc. -- Nate