Date: Mon, 02 May 2016 21:45:59 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 209202] [PATCH] [powermac_thermal] In-Kernel PowerMac fan control does not effectively regulate some quad core models Message-ID: <bug-209202-8-TA0BvbJPmf@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-209202-8@https.bugs.freebsd.org/bugzilla/> References: <bug-209202-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D209202 --- Comment #4 from Mark Millard <markmi@dsl-only.net> --- (In reply to gmbroome from comment #3) Do not interpret my notes as an attempt to block the changes. The notes are just general background. Keeping a failure-mode machine operational can be worth while in the right kind of context. I just did not want the performan= ce tradeoff and I did not want to ask Justin Hibbits to do more than he already had done. I have access to an example "quad core Powermac G5" of each type relative to one pump vs. two, where both work without overheating problems and always h= ave: # sysctl -a | grep pump dev.smu.0.fans.cpu_a_pump.rpm: 1716 dev.smu.0.fans.cpu_a_pump.maxrpm: 3600 dev.smu.0.fans.cpu_a_pump.minrpm: 1250 (So only one pump.) $ sysctl -a | grep pump dev.smu.0.fans.cpu_b_pump.rpm: 1485 dev.smu.0.fans.cpu_b_pump.maxrpm: 3600 dev.smu.0.fans.cpu_b_pump.minrpm: 1250 dev.smu.0.fans.cpu_a_pump.rpm: 1480 dev.smu.0.fans.cpu_a_pump.maxrpm: 3600 dev.smu.0.fans.cpu_a_pump.minrpm: 1250 (So two pumps.) I put the same kinds of loads on each, although one has 12 GBytes of RAM and the other has 16 GBytes. As far as I can tell if a PowerMac G5 Quad Core has an overheating problem = then something is in a failure mode, usually the cooling system. --=20 You are receiving this mail because: You are the assignee for the bug.=
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