Date: Sat, 10 Jan 2009 02:13:13 +0200 From: Alexander Motin <mav@FreeBSD.org> To: Gabriel Lavoie <glavoie@gmail.com> Cc: freebsd-acpi@freebsd.org Subject: Re: EST (Enhanced Intel SpeedStep(R) Technology) on amd64 Message-ID: <4967E819.6010305@FreeBSD.org> In-Reply-To: <d05df8620901091610v14e6cda4uc3a60355a170801f@mail.gmail.com> References: <1231471393.00057821.1231461001@10.7.7.3> <1231492987.00057896.1231480801@10.7.7.3> <1231514587.00058037.1231502401@10.7.7.3> <1231532583.00058199.1231520401@10.7.7.3> <1231543382.00058245.1231531801@10.7.7.3> <4967E3F1.3050002@FreeBSD.org> <d05df8620901091610v14e6cda4uc3a60355a170801f@mail.gmail.com>
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Gabriel Lavoie wrote: > 2009/1/9 Alexander Motin <mav@freebsd.org>: >> Gabriel Lavoie wrote: >>> Another question. Any reason why powerd doesn't use >>> dev.est.0.freq_settings when it is available instead of >>> dev.cpu.0.freq_levels? >>> >>> On my system: >>> dev.cpu.0.freq_levels: 2500/88000 2187/77000 2000/47608 1750/41657 >>> 1600/44616 1400/39039 1200/41800 1050/36575 900/31350 750/26125 >>> 600/20900 450/15675 300/10450 150/5225 >>> dev.est.0.freq_settings: 2500/88000 2000/47608 1600/44616 1200/41800 >> dev.cpu.0.freq_levels is just a mix of est and p4tcc levels. By default >> powerd uses all of them. If you really wish, you can disable p4tcc with: >> hint.p4tcc.0.disabled=1 >> hint.acpi_throttle.0.disabled=1 >> then dev.cpu.0.freq_levels will be equal to dev.est.0.freq_settings. > > Working like a charm! I wasn't sure so I added both 0 and 1 for both > cores and it seems to be correct. I had to add them in loader.conf or > device.hints? Put them in loader.conf and it seems to be OK. Whatever you prefer, >>> If I don't lower the polling time of powerd to 100ms, my system >>> becomes way too much unresponsive because powerd takes too much time >>> to increase the frequency, step by step and there are a lot of >>> settings with dev.est.0.freq_settings (14). With >>> dev.est.0.freq_settings, the minimal setting is high enough so the >>> system stays responsive and powerd would bring it up to max frequency >>> quickly enough, even if the polling time is still kept at 500ms. This >>> would work more like Windows or Linux where the lowest frequency at >>> which the CPU will drop is the lowest EIST gives (here 1200 MHz). >> I have just merged updated powerd to 7-STABLE to address this issue. > > If I run release, it means it will be available in 7.2? 7.2 and 8.0. -- Alexander Motin
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