-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Mattia Dongili wrote: > On Fri, Feb 16, 2007 at 06:22:29PM +0100, Mattia Dongili wrote: >> On Thu, Feb 15, 2007 at 11:26:24PM +0200, Eddy Petri??or wrote: >> [...] >>> I have installed Debian GNU/kFreeBSD and indeed, the levels are many >>> more than on Linux: >>> >>> sysctl dev.cpu.0.freq_levels >>> >>> Results in a list of frequencies down to 31 MHz. I tried some script I >>> found on the freebsd lists[1] to test the speed of blowfish at various >>> speeds and observed that on my Core 2 Duo that: >> [...] >>> In conclusion, it would be nice if this code would be ported to Linux, too. >> AFAICT they are mixing freq scaling and throttling. >> See /proc/acpi/processor/CPU[01]/throttling, I have:
Is that on Linux or kFreeBSD? >> state count: 8 >> active state: T0 >> states: >> *T0: 00% >> T1: 12% >> T2: 25% >> T3: 37% >> T4: 50% >> T5: 62% >> T6: 75% >> T7: 87% >> >> and the available frequency steps here are 1.83 GHz, 1.33 GHz, 1000 MHz >> This is a Core2 Duo T5600. >> >> so eg. at 1GHz I can throttle at 880, 750, 630, 500, 380, 250 and >> 130 MHz. > > Oh, and let me add (even if probably aready mentioned): throttling > doesn't save any power, it just idles your cpu. Ok, less heat (no fans, > etc) but the real saving is probably unnoticeable. Taking into account that my laptop almost all the time heats up even if scaled down to 50% (1GHz/minimum) in Linux, thus triggering periodic fan runs at regular intervals, which, of course, leads to more power consumption, I'd welcome throttling .... although I don't know if it would make any difference taking into account my laptop always runs at 1GHz when on battery. - -- Regards, EddyP ============================================= "Imagination is more important than knowledge" A.Einstein -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFF16KYY8Chqv3NRNoRAl5tAJ9DZVNZsejOGdCS/nq8rY8owsTPwACfVg1w RH14DRatG13zHexsubtgshY= =Isx3 -----END PGP SIGNATURE----- -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
