Date: Fri, 12 Dec 2003 16:36:35 -0800 (PST) From: Nate Lawson <nate@root.org> To: Alexandre Sunny Kovalenko <Alex.Kovalenko@verizon.net> Cc: current@freebsd.org Subject: Re: ACPI throttling changes Message-ID: <20031212163613.Y54319@root.org> In-Reply-To: <20031212192314.1c895fb5.Alex.Kovalenko@verizon.net> References: <20031209175230.I44055@root.org> <20031212192314.1c895fb5.Alex.Kovalenko@verizon.net>
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On Fri, 12 Dec 2003, Alexandre Sunny Kovalenko wrote: > On Tue, 9 Dec 2003 17:57:53 -0800 (PST) > Nate Lawson <nate@root.org> 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. > > > > -Nate > > I do not know if it's still of any use (I just caught up on my reading), > but for whatever it worth, results are below. To be fair results are a > little bit surprising to myself as I "feel" better response with 'economy' > set to 4 then with 'economy' set to 2, but of course this in unscientific. Please cvsup, a fix for this has been committed. -Nate
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