From owner-freebsd-ppc@FreeBSD.ORG Sun Jan 18 05:36:14 2015 Return-Path: Delivered-To: freebsd-ppc@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 2C81687C; Sun, 18 Jan 2015 05:36:14 +0000 (UTC) Received: from mail-lb0-x233.google.com (mail-lb0-x233.google.com [IPv6:2a00:1450:4010:c04::233]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 8B21DC6A; Sun, 18 Jan 2015 05:36:13 +0000 (UTC) Received: by mail-lb0-f179.google.com with SMTP id z11so23757840lbi.10; Sat, 17 Jan 2015 21:36:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=nbUKGvFo1He+ct3B96YLSjRwrdHWI45UlCqaVNgvtqk=; b=ALsInEKEC0zlLYuky8L+rqvd0JBfQvykkovP0FXsi+pT46F5glBjdbx+zpUmvzL6RS ZUm8K4NeG8yMROverAeNx4urH0gPhtFSGfF79a8oMGiYDijK+0++s5EtdV88Y8OIcunA nlYA7zo+pEEv4yfD4AF7FQmrPi836buyMppViZJ/bp8JT/Hf7039fuVjNT/gTLgZIbuo ZlKwbt9InfGHieazXAdT65LMWVo4pA8MOP+aWzH28NUpez/AsQPWv2RX8SRiVG7FFAWA EARtzmui1yCaUkCuUqnJxAisqsvd0zEjmA2ZPQZHbnekMzMzvM0HeXnMpnpUxMc+5BMR rFig== MIME-Version: 1.0 X-Received: by 10.152.7.180 with SMTP id k20mr9811244laa.4.1421559370999; Sat, 17 Jan 2015 21:36:10 -0800 (PST) Received: by 10.25.126.214 with HTTP; Sat, 17 Jan 2015 21:36:10 -0800 (PST) Received: by 10.25.126.214 with HTTP; Sat, 17 Jan 2015 21:36:10 -0800 (PST) In-Reply-To: <8E81058D-DFF8-4C54-8FA2-1202CC03081D@dsl-only.net> References: <42CF1E40-5BD5-4B00-86E9-C62AEB9B8B93@dsl-only.net> <15A6D627-9DC7-48AF-B133-94980AFCE46A@dsl-only.net> <20150115231129.1b28c8d0@zhabar.attlocal.net> <0631235D-A505-4C37-87D7-6F46A14552AB@dsl-only.net> <20150116233145.6708cc6f@zhabar.attlocal.net> <31331F84-63CC-48B7-81B5-E70A22E88CB7@dsl-only.net> <604BAA0A-FD15-4310-88B2-DFEE9988D1EB@dsl-only.net> <20150117080916.3e321a4f@zhabar.attlocal.net> <42358897-0AC2-4B35-BE01-1D4EB2CC2F47@dsl-only.net> <4B8426E1-B0C8-430E-BA9F-EBBF2B1B935E@dsl-only.net> <592299C1-C92D-4CB3-8C4A-DB12FF7D102B@dsl-only.net> <8E81058D-DFF8-4C54-8FA2-1202CC03081D@dsl-only.net> Date: Sat, 17 Jan 2015 21:36:10 -0800 Message-ID: Subject: Re: PowerMac G5 quad-core, CPU A1 DIODE TEMP: 90.8 C (for example): How to handle? [Mac OS X behavior] From: Justin Hibbits To: Mark Millard Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.18-1 Cc: FreeBSD PowerPC ML X-BeenThere: freebsd-ppc@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Porting FreeBSD to the PowerPC List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 18 Jan 2015 05:36:14 -0000 I noticed on my quad running OS X spins up the fans all the way down at 55C. Perhaps you can try that, set the initial multiplier to 300 or more. I can add a sysctl to change the multiplier, if that would help people. -Justin On Jan 17, 2015 2:25 PM, "Mark Millard" wrote: > Looks like only Justin and Nathan got the graph (since I directly sent the > message to them but the mail list stripped it). > > === > Mark Millard > markmi T dsl-only.net > > On 2015-Jan-17, at 02:20 PM, Mark Millard wrote: > > I've included a picture of the graph of core temperatures from Mac OS X, > spanning a little over 6 minutes. The core temperature plots are colored > non-black. > > The "5 to 7" that I mentioned below is more like "3 to 12" over this time > interval. > > > > > === > Mark Millard > markmi at dsl-only.net > > On 2015-Jan-17, at 02:04 PM, Mark Millard wrote: > > Mac OS X 10.5 does force idle time of some form to keep core temperatures > down! My evidence is as follows. > > The application Temperature monitor does show me temperature records > (including graphs over time) under Mac OS X 10.5 for the G5. (No rpms.) It > displays the information as for cpu A 1&2 and cpu B 1&2 (instead of 0 and > 1). A2 is what it shows as a the hot one, matching FreeBSD's a1. I watched > with the current short-term temperature display updating once a second (set > via preferences). > > Once it reached around the low 90C range on A2 the temperature on A2 > started oscillating, going from the mid/low 90C's down to the 60C's/70C's > and back up again, over and over, fairly rapidly. But the graph of the > temperatures for all the cores shows all the CPU/core temperatures as > oscillating in matching timing. > > So I conclude that Mac OS X is doing something to give all the CPUs/cores > time to cool down as soon as any one of them gets too hot. > > So I do not expect Mac OS X to automatically power down, it has already > been far longer than it takes for FreeBSD to shutdown with the patched > RPM/cooling code. Menu meters shows the cores as fully used (mostly 100%, > occasional 99%). They are mostly running 6 of my double/long-long HINT > benchmark variants built various ways with parameter values input that are > designed for long runs. (HINT is memory/CPU limited until it causes > noticeable paging. But I've configured to not page with the 16GB of RAM > avilable.) > > So far the maximum temperature is 95.8C, and that is on A2. The next > highest core is A1 at 81.2C so far. During this oscillation A2's minumum is > 60.7C so far. > > There is a pattern to the drops: there is a sequence of 5 to 7 in a row > where the drop starts back up almost immediately but then there is a longer > duration with the temperatures staying down before it starts back up again. > After the longer duration drop the temperature rise is not as rapid so it > is longer until the next forced-drop. > > For the 5-7 in a row they tend to get somewhat closer together the further > into the sequence. It may be that the time between triggers the longer > cooling duration. > > The G5 has been kept busy for well over an hour, far longer than FreeBSD > did for "make -j 8 buildworld buildkernel" > > === > Mark Millard > markmi at dsl-only.net > > > >