Date: Fri, 9 Jan 2009 19:10:40 -0500 From: "Gabriel Lavoie" <glavoie@gmail.com> To: "Alexander Motin" <mav@freebsd.org> Cc: freebsd-acpi@freebsd.org Subject: Re: EST (Enhanced Intel SpeedStep(R) Technology) on amd64 Message-ID: <d05df8620901091610v14e6cda4uc3a60355a170801f@mail.gmail.com> In-Reply-To: <4967E3F1.3050002@FreeBSD.org> 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>
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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. > >> 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? > > -- > Alexander Motin > Thanks Gabriel -- Gabriel Lavoie glavoie@gmail.com
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