Date: Wed, 10 Dec 2003 11:44:04 -0500 (EST) From: John Baldwin <jhb@FreeBSD.org> To: Nate Lawson <nate@root.org> Cc: current@freebsd.org Subject: RE: ACPI throttling changes Message-ID: <XFMail.20031210114404.jhb@FreeBSD.org> In-Reply-To: <20031209175230.I44055@root.org>
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On 10-Dec-2003 Nate Lawson wrote: > I'm working on a shared CPU frequency control driver. One step is to > remove some of the autonomy of the throttling portion of acpi_cpu. > Please test this patch if you have a machine which supports throttling. > With this patch, throttling can be changed by doing: > > sysctl hw.acpi.cpu.current_speed=X > > where X is some number between 1 and hw.acpi.cpu.max_speed. It is no > longer driven by AC line transitions. Run a CPU benchmark like this one > to make sure the throttling transition still works with this patch. > > dd if=/dev/zero bs=1m count=500 | md5 > > This is part of a larger work. Don't worry, it won't be committed until > general CPU frequency control is done so no loss of functionality will be > committed. We need to support using throttling for passive cooling btw. My new laptop I just got has no active cooling support, but does have _TC1 and _TC2 objects in its thermal zone. Are you going to add that? -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/
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