Enhanced SpeedStep driver available
Colin Percival <[email protected]>
| Newsgroups | gmane.os.freebsd.current,gmane.os.freebsd.devel.mobile |
|---|---|
| Message-ID | <[email protected]> |
Thanks to everyone who has been sending me data about their processors (and in particular, the 90nm versions), I now have a first draft of a Enhanced SpeedStep driver available. For people with the appropriate processors (Pentium M only), this makes it possible to adjust the cpu frequency via a new sysctl (hw.est_curfreq), and have the cpu voltage adjusted at the same time. I've also put together a very simple control daemon which reads kern.cp_time every second and adjusts the cpu frequency based on the fraction of cpu time which is idle. This increases my laptop's battery life by around 40%. All the code is online at http://www.daemonology.net/freebsd-est/ Assuming I don't hear any major bug reports in the next few days, I'll package these into ports and hopefully get them into the ports tree in time for 5.3-RELEASE. Colin Percival _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "[email protected]"