From owner-freebsd-ppc@freebsd.org Tue Jan 12 16:43:15 2021 Return-Path: Delivered-To: freebsd-ppc@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id F38564DE598 for ; Tue, 12 Jan 2021 16:43:15 +0000 (UTC) (envelope-from dclarke@blastwave.org) Received: from mail.oetec.com (mail.oetec.com [108.160.241.186]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mail.oetec.com", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4DFbwz3HhSz3nRD for ; Tue, 12 Jan 2021 16:43:15 +0000 (UTC) (envelope-from dclarke@blastwave.org) X-Spam-Status: No X-oetec-MailScanner-From: dclarke@blastwave.org X-oetec-MailScanner-SpamCheck: not spam, SpamAssassin (not cached, score=-3.1, required 6, autolearn=not spam, ALL_TRUSTED -1.00, BAYES_00 -1.90, DKIM_SIGNED 0.10, DKIM_VALID -0.10, DKIM_VALID_AU -0.10, DKIM_VALID_EF -0.10, NICE_REPLY_A -0.00, URIBL_BLOCKED 0.00) X-oetec-MailScanner: Found to be clean X-oetec-MailScanner-ID: 10CGgcRd025888 X-oetec-MailScanner-Information: Please contact oetec for more information Received: from [172.16.35.2] (cpeac202e7325b3-cmac202e7325b0.cpe.net.cable.rogers.com [99.253.170.241]) (authenticated bits=0) by mail.oetec.com (8.15.2/8.15.2/Debian-8) with ESMTPSA id 10CGgcRd025888 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Tue, 12 Jan 2021 11:42:40 -0500 Subject: Re: Heat-death of the last of the 2-socket/2-cores-each PowerMac G5s that I have access to To: freebsd-ppc@freebsd.org References: <27E8A3B1-7278-464E-A284-0B294337B3DA@yahoo.com> From: Dennis Clarke Message-ID: <563ef275-97b0-3026-1073-ff715c9cecd7@blastwave.org> Date: Tue, 12 Jan 2021 16:42:38 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 4DFbwz3HhSz3nRD X-Spamd-Bar: --- X-Spamd-Result: default: False [-4.00 / 15.00]; RCVD_TLS_ALL(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; R_DKIM_ALLOW(-0.20)[blastwave.org:s=default]; MID_RHS_MATCH_FROM(0.00)[]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; R_SPF_ALLOW(-0.20)[+mx]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-ppc@freebsd.org]; TO_DN_NONE(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; SPAMHAUS_ZRD(0.00)[108.160.241.186:from:127.0.2.255]; ARC_NA(0.00)[]; DKIM_TRACE(0.00)[blastwave.org:+]; DMARC_POLICY_ALLOW(-0.50)[blastwave.org,quarantine]; NEURAL_HAM_SHORT(-1.00)[-1.000]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; NEURAL_HAM_LONG(-1.00)[-1.000]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RBL_DBL_DONT_QUERY_IPS(0.00)[108.160.241.186:from]; ASN(0.00)[asn:812, ipnet:108.160.240.0/20, country:CA]; RCVD_COUNT_TWO(0.00)[2]; MAILMAN_DEST(0.00)[freebsd-ppc]; RECEIVED_SPAMHAUS_PBL(0.00)[99.253.170.241:received] X-BeenThere: freebsd-ppc@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Porting FreeBSD to the PowerPC List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 12 Jan 2021 16:43:16 -0000 On 1/12/21 4:38 AM, Mark Millard via freebsd-ppc wrote: > > > On 2021-Jan-11, at 17:42, Mark Millard wrote: > >> The last of the 4-core PowerMac G5s that I have access to now shuts >> down for "CPU B0 DIODE TEMP" that "exceeds critical temperature >> (90.0 C)" when I try to rebuild/update ports or such. The other >> 4-core G5 failed for such reasons in similar contexts a few months >> ago.,Interestingly, the two G5s have very different liquid cooling >> systems despite the similar time frame for the failures. >> >> Without the faster G5s, I may just use cross-built world/kernel >> material and see if there is a tolerable but minimal set of ports >> for supporting boot testing/dump inspection and basic operation of >> the slower 2-socket/1-core-each and 1-socket/1-core-each PowerMacs >> that I have access to, avoid things like building devel/llvm* >> ports that take so long. (I have fairly strong time preferences.) > > I've done some more testing and, while use as a (full load/speed) > builder machine is a no-go, it looks like this 4-core G5 can > still be used for boot testing and basic operation without > overheating. The prior failing machine overheated more easily > but might have a similar status if I test it just for such use. > > How long the recently failed G5 will be useful for boot and basic > operation testing, I do not know. But probably longer than for > the originally-failing G5. > The shipping cost of a replacement unit would be more money than the entire machine itself. I have four of these units where I keep one of them running neatly. I think I have half a dozen more somewhere in the back of a warehouse in Toronto. Back in 2010 ( or earlier ) they were fantastic CPU powerhouse units running some math crunch daemons that I wrote. Also, hard to believe but it was more cost effective than running the big SPARC64 units that I had at the same time. Ever tried to run Sun/Oracle M4000 or M5000 machines? In any case please drop me a line off-list and let's see if we can figure out a way to get a workable unit into your hands. -- Dennis Clarke RISC-V/SPARC/PPC/ARM/CISC UNIX and Linux spoken GreyBeard and suspenders optional