Date: Mon, 25 Apr 2011 23:58:39 +1000 (EST) From: Ian Smith <smithi@nimnet.asn.au> To: Bartosz Fabianowski <freebsd@chillt.de> Cc: freebsd-stable@freebsd.org, John <john@theusgroup.com>, Jeremy Chadwick <freebsd@jdc.parodius.com> Subject: Re: System extremely slow under light load Message-ID: <20110425232429.N85801@sola.nimnet.asn.au> In-Reply-To: <4DB56CDA.50504@chillt.de> References: <4DA596D3.1090803@chillt.de> <op.vt1efdn68527sy@pinky> <BANLkTik5Jq1QP776xQ0zQvQ5MKYe4LQZUA@mail.gmail.com> <4DB44DA3.5060509@chillt.de> <4DB4589B.2020909@ksu.ru> <4DB45D6C.20203@chillt.de> <20110424182456.9DD03589@server.theusgroup.com> <4DB46ED4.2010500@chillt.de> <20110425004818.GA22579@icarus.home.lan> <4DB51F27.5010508@chillt.de> <20110425184728.C73992@sola.nimnet.asn.au> <4DB56CDA.50504@chillt.de>
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On Mon, 25 Apr 2011, Bartosz Fabianowski wrote: [..] > See above: Unfortunately, the machine did nor respond well at all. Instead, > it is overheating even worse. Sorry to hear none of that helped. It seems a very serious problem, and it would be useful to know if it behaves any better under linux or not. > > Try using C2. It helps more with some CPUs than others, but it's worth > > a try for further reducing heat, especially at idle. Ie in rc.conf: > > > > performance_cx_lowest="C2" > > economy_cx_lowest="C2" > > I have set dev.cpu.X.cx_lowest="C2" at run-time. If I understand correctly, > this should achieve the same effect. The CPU does not seem to ever make it to > C2 though, even after I enable it: > > %sysctl dev.cpu | grep cx_usage > dev.cpu.0.cx_usage: 100.00% 0.00% last 270us > dev.cpu.1.cx_usage: 100.00% 0.00% last 399us > dev.cpu.2.cx_usage: 100.00% 0.00% last 403us > dev.cpu.3.cx_usage: 100.00% 0.00% last 404us > dev.cpu.4.cx_usage: 100.00% 0.00% last 323us > dev.cpu.5.cx_usage: 100.00% 0.00% last 313us > dev.cpu.6.cx_usage: 100.00% 0.00% last 174us > dev.cpu.7.cx_usage: 100.00% 0.00% last 137us You need sysctl hw.acpi.cpu.cx_lowest="C2" instead .. that's what /etc/rc.d/power_profile adjusts when you apply or remove power. I doubt it's likely to help much given the scale of overheating. > > > dev.est.0.freq_settings: 1734/45000 1733/45000 1599/41741 1466/38582 > > > 1333/35485 1199/32426 1066/29457 933/26552 > > > > With throttling disabled, those are what you should be left with for > > dev.cpu.0.freq_levels. > > Yes, these are the frequencies I have available now. 1333 makes the machine > idle around 85°C, 1999 leads to 78-80°C. That's pretty sad. Not sure what the first two differing by only 1MHz means .. but I'm out of ideas, and my depth. cheers, Ianhelp
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