Date: Wed, 18 Aug 2004 11:11:55 +0200 From: Michael Lestinsky <michael.lestinsky@mpi-hd.mpg.de> To: freebsd-mobile@freebsd.org Subject: Re: Enhanced SpeedStep driver available Message-ID: <20040818091155.GA7669@mikesch.dhcp.mpi-hd.mpg.de> In-Reply-To: <6.1.0.6.1.20040816074348.03f99338@popserver.sfu.ca> References: <6.1.0.6.1.20040816074348.03f99338@popserver.sfu.ca>
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Colin Percival: > All the code is online at > http://www.daemonology.net/freebsd-est/ Thanks, that's really nice. I have it running now for some time and the first thing I observed was a reduced cpu temperature. But I don't see your 40% battery life extension. Another thing I see is: When I boot from battery, load the est.ko module, plug in the powersupply and reload the module I get both times: Intel(R) Pentium(R) M processor 1400MHz: Enhanced SpeedStep running at 600 MHz (956 mV) while if I boot while on powersupply the voltage is at about 1400mV and doesn't lower when switching back to battery. The funny thing is, it doesn't seem to affect the lifetime at all. Whether at 1400 or at 950mV, I get about 1:50h in both cases. The system is a Samsung X05 and has this processor: CPU: Intel(R) Pentium(R) M processor 1400MHz (598.06-MHz 686-class CPU) Origin = "GenuineIntel" Id = 0x695 Stepping = 5 Features=0xa7e9f9bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,TM,PBE> What still keeps me confused is all those different kinds to introduce some throttling to the system. There is hw.acpi.cpu.throttle_state, TCC and now EST. How do they all walk along? Or, what does ACPI throttling actually do? Bye Michael -- Michael Lestinsky Max-Planck-Institut fuer Kernphysik michael.lestinsky@mpi-hd.mpg.de Saupfercheckweg 1; 69117 Heidelberg Phone +49 6221 516-504 Fax: -602 http://www.mpi-hd.mpg.de
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