Date: Wed, 30 Nov 2005 10:05:04 -0800 From: Nate Lawson <nate@root.org> To: Marco Calviani <marco.calviani@gmail.com> Cc: freebsd-acpi@freebsd.org, freebsd-stable@freebsd.org, freebsd-questions@freebsd.org Subject: Re: cpufreq and changing driver Message-ID: <438DE9D0.6080107@root.org> In-Reply-To: <da5cd1900511300553r40fcb922m@mail.gmail.com> References: <da5cd1900511300337t22728ec8y@mail.gmail.com> <20051130133224.GA4713@poupinou.org> <da5cd1900511300553r40fcb922m@mail.gmail.com>
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Marco Calviani wrote: > Hi, > > 2005/11/30, Bruno Ducrot <ducrot@poupinou.org>: > >>You have to load the cpufreq.ko module at boot. >>Adding that line: >>cpufreq_load = "YES" >>to /boot/loader.conf >>should be OK. > > > I have that line in that position, and it seems working. The point is > that i would like to change the driver and use (AFAIU) a better driver > for my system (est). > In particular i have: > > dev.cpu.0.%desc: ACPI CPU > dev.cpu.0.%driver: cpu > dev.cpu.0.%location: handle=\_PR_.CPU0 > dev.cpu.0.%pnpinfo: _HID=none _UID=0 > dev.cpu.0.%parent: acpi0 > > Maybe i didn't understood well: but what i have to do to use the Intel > Enhanced SpeedStep driver? You should send the full output of "sysctl dev.cpu". There is no cpufreq driver (est, acpi_perf, or other) driver running. Perhaps look at your dmesg to see if one is probing/attaching. If you are using acpi and load cpufreq.ko, you've got all the cpufreq drivers in one package. The right one for your platform will automatically probe/attach. >>powerd need some rework in order to get it working properly. There >>is one FreeBSD project on that subject if you are interrested. > > Well, thanks i'm very interested, although i'm not at all experienced > in kernel programming.... > > I'm not inside this issue, but it would not be possible to "emulate" > the behaviour of the ondemand governor? (sorry if this question makes > no sense) I have no idea what you mean by "on-demand governor". The only automated control of cpu speed is either by the BIOS (which we can't control) or the TM/TM2 (and that one is heat-based, not load-based). -- Nate
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