Date: Thu, 23 Sep 2010 11:26:20 +0300 From: Alexander Motin <mav@FreeBSD.org> To: Bryce <bryce@bryce.net>, FreeBSD Stable <freebsd-stable@freebsd.org> Subject: Re: SuperMicro i7 (UP) - very slow performance Message-ID: <4C9B0F2C.20601@FreeBSD.org> In-Reply-To: <mailpost.1285202775.8039756.86645.mailing.freebsd.stable@FreeBSD.cs.nctu.edu.tw> References: <mailpost.1285173904.332223.70365.mailing.freebsd.stable@FreeBSD.cs.nctu.edu.tw> <mailpost.1285202775.8039756.86645.mailing.freebsd.stable@FreeBSD.cs.nctu.edu.tw>
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Bryce wrote: > I don't think it is temperature, I have never seen temps above the low > 60's C and the speed never goes down from 2.8 Ghz. This is what I see > when running your dd for a while: > > bryce@tahiti[~]>sysctl -a | grep temperature > dev.cpu.0.temperature: 55.0C > dev.cpu.1.temperature: 55.0C > dev.cpu.2.temperature: 51.0C > dev.cpu.3.temperature: 52.0C > dev.cpu.4.temperature: 59.0C > dev.cpu.5.temperature: 61.0C > dev.cpu.6.temperature: 51.0C > dev.cpu.7.temperature: 52.0C > bryce@tahiti[~]>sysctl -n dev.cpu.0.freq > 2801 Looks not bad, but I would checked it during good compilation, using all cores. Just to compare, my Core i7-870 with boxed cooler reports: 31C being idle with tuned power management, 53C being idle without any power management, 85C during `make -j16`. That system did `make -j16 universe` in about 3 hours AFAIR. PS: AFAIK dev.cpu.0.freq won't report you if frequency was lowered due to overheating. -- Alexander Motin
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