Date: Sun, 04 May 2014 11:47:14 -0400 From: Allan Jude <freebsd@allanjude.com> To: freebsd-current@freebsd.org Subject: Re: Leaving the Desktop Market Message-ID: <53666102.5080205@allanjude.com> In-Reply-To: <20140504142839.GA9271@La-Habana> References: <CAF6rxgkeBozvfV-L0%2BrFZ6fWRn0=Gi3BNq1kPL=-HTq0TD6MkQ@mail.gmail.com> <A70900DF-4BAA-427F-8731-01211FFD1887@mail.turbofuzz.com> <3F7430D7-3C0F-43E1-8EBD-8AA4F701497C@FreeBSD.org> <20140503155745.GA2457@La-Habana> <CAJ-VmokHQvb2S-1c08J3RECUMosQ%2Bcd1gdB91LAb5famfKqP5w@mail.gmail.com> <20140503192305.GA1847@La-Habana> <CAJ-Vmon1ZYX18SN1f=z9N=hSgpZrAxXMxiJBUDWk6LYvMRiHmw@mail.gmail.com> <CAN6yY1uo08PDsYJ2KQNjw4hYuNsNJUvRu1b0cG%2B387F6Owkukg@mail.gmail.com> <20140504142839.GA9271@La-Habana>
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[-- Attachment #1 --] On 2014-05-04 10:28, Matthias Apitz wrote: > El día Saturday, May 03, 2014 a las 04:59:48PM -0700, Kevin Oberman escribió: > >> On Sat, May 3, 2014 at 1:25 PM, Adrian Chadd <adrian@freebsd.org> wrote: >> >>> Set it to the lowest available Cx state that you see in dev.cpu.0 . >>> >>> >> Available is not required. Set it to C8. That guarantees that you will use >> the lowest available. The correct incantation in rc.conf is "Cmax". >> performance_cx_lowest="Cmax" >> economy_cx_lowest="Cmax" >> >> But, unless you want laggy performance, you will probably also want: >> hint.p4tcc.0.disabled=1 >> hint.acpi_throttle.0.disabled=1 >> in /boot/loader.conf. Low Cx states and TCC/throttling simply don't mix >> well and TCC is not effective, as mentioned earlier in this thread. > > Re/ powerd I have in /etc/rc.conf: > > # powerd > powerd_enable="YES" > powerd_flags="-a max -b adp" > # > performance_cx_lowest="Cmax" > economy_cx_lowest="Cmax" > > (and the additional hint.* in /boot/loader.conf as well). Which process > 'performance_cx_lowest' and 'economy_cx_lowest' target exactly as config > values? > > Thx > > matthias > In a pretty unscientific test on my laptop (Lenovo T530 with Intel i5 3320M), setting hw.acpi.cpu.cx_lowest=C8 lowered power consumption at idle by about 3 watts, which adds about 30-45 minutes to my battery life during conservative usage. Using PCBSD 10, so hint.acpi_throttle.0.disabled=1 was already set (apparently solves some issue with powerd on some AMD systems) I have added hint.p4tcc.0.disabled=1 but not sure where to expect to see a difference. -- Allan Jude [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.16 (MingW32) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBAgAGBQJTZmEFAAoJEJrBFpNRJZKfOFgP/iwKEjU9SlbhI7yWWgLFrY0b EiJ7fDPU2e59KF+09+2ubxaCD7KkTnrhgEJ1oU5JXnvoX/1S0HR36PBjqGpQcDCz xb1vL/VY7Tv1Gvjq1ZmiwRnig0fHsZFxFL7RtYbNfHezHKO2vyZoHl4yi+zEvLNP gZlJD7tL1oMTPDAKMTbBC8FV7K5NEHWVEMwa+IiZ+W+L97rgNSUx7YAcHCrHjdcX 87E/GSXAF/zqaZTAsmPkuAAIgjhy/cCD3JtrJdsioTYyWOTt1md4jvi30kg5X4k0 lWaEQnUgvW61sUzMMOxEfHqgGgQGDLRJzMAdPTLA6zRFTm9ASlpGNiNo5GZjbTBG f4MrbPbTiXzasPXeHgOQm97X38P7/ig0/r5EldTnY8S24JlC9zzuP/uDNU00WbkV cf3cqXqtnhffTDP9ModUE8KN7XR1CuoAZ4KYhtHF4yn7Co579u5HdU+MVapMInTh bIpRC7Xuq4PyY62rKGxoNEZNV/o8Ase0HZcEzaWX6WtyM2eMz6F/eF/xFdqN4RZO ggRQNHBrmq2ogp15gkeUAbGgKqhRFB78ruYoSKLod2srA+Q+QMLF8c0/QsB3qq/p wL3ICE1Ep4Z8vA3VHLTikOX7f49FN1+w69MJ16GUzFiFWcK5PLfBnhspCO6QAC4Q 2wkconGhzPhNWkMoJ12Q =sm7y -----END PGP SIGNATURE-----
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