Date: Thu, 21 Feb 2013 08:54:33 -0800 From: Justin Hibbits <jhibbits@freebsd.org> To: FreeBSD PowerPC ML <freebsd-ppc@freebsd.org> Subject: CFT: PMU-based speed changes Message-ID: <CAHSQbTAjw5%2BEVw2H5NQTfKLR-66HoEEqEV=Skhgg%2BhBMdTzEEw@mail.gmail.com>
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After over a year of off-and-on work, lots of frustration, and help from quite a few people, I present to you all for testing, PMU speed changes. You can find it in the projects/pmac_pmu branch, which is branched from -CURRENT back in December/January. Anybody with a Titanium Powerbook, and some of the early Aluminum books, should now be able to run their machines at full speed using powerd, or sysctl dev.cpu.0.freq. I tested this on my 1GHz TiBook (last generation TiBook), using md5 on a core dump, and saw a nice performance boost. That branch also has PMU-based sleep code in place, but it does not work (don't try to set sysctl dev.pmu.0.sleep, your machine will go catatonic). I haven't decided yet if I will commit what I have minus the sleep, or wait until sleep is done. As always, any comments and suggestions are welcome. - Justin
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