Date: Wed, 02 Mar 2005 12:00:50 -0800 From: Nate Lawson <nate@root.org> To: Eric Anderson <anderson@centtech.com> Cc: freebsd-acpi@freebsd.org Subject: Re: System running hot / CPU freq changes randomly Message-ID: <42261B72.8070602@root.org> In-Reply-To: <42260B46.5010100@centtech.com> References: <42260B46.5010100@centtech.com>
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Eric Anderson wrote: > I've jsut upgraded from 5.3-STABLE to -CURRENT, and have a few things > I've noticed. One, my machine runs much hotter - it used to stay around > 40 - 41C, but not stays around 49C. Also, it actually seems like it's > running slower - and maybe it is. It looks like the cpu frequency is > changing all the time, hopping around from one freq to another, for no > real reason that I can tell. > I'm running on a dell D600 (1.6GHZ Pentium M), with -CURRENT as of last > night. > I can provide any additional information needed.. > > > Here's what I mean (on AC, not battery): > [ 12:48:25 root@neutrino ~ ]# sysctl dev.cpu.0.freq > dev.cpu.0.freq: 1600 > [ 12:48:27 root@neutrino ~ ]# sysctl dev.cpu.0.freq > dev.cpu.0.freq: 400 > [ 12:48:28 root@neutrino ~ ]# sysctl dev.cpu.0.freq > dev.cpu.0.freq: 400 Are you running powerd? If you have powerd_enable="YES" in /etc/rc.conf, it defaults to adaptive control. I _thought_ I made the default "NO" until we get more testing. > hw.acpi.cpu.cx_supported: C1/1 C2/1 C3/85 C4/185 > hw.acpi.cpu.cx_lowest: C1 > hw.acpi.cpu.cx_usage: 100.00% 0.00% 0.00% 0.00% I had to disable C2 and higher by default due to some C3 problems some users were having. Hopefully we'll sort this out at some point and re-enable it by default. You can get the old values back through /etc/rc.conf. Add: performance_cx_lowest="LOW" economy_cx_lowest="LOW" (Or explicitly use "C3" if C4 doesn't work right for you). -- Nate
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