Messages in this thread | | | From | Erik Mouw <> | Subject | Re: BogoMIPS and changed CPU speed | Date | Thu 20 Jul 2000 12:02:10 +0100 (MDT) |
| |
On Wed, 19 Jul 2000 16:39:06 +0200, David Balazic wrote: > As I understand the BogoMIPS value is used for some fine grained > delays. How does then the system survive a big change in the processor > speed when : > > - user changes FSB on the fly ( possible with newer mainboards, > I never tried it though ) > - CPU goes to lower clock due to power management > - user (de)activates TURBO on older x86 computers
The system survives the speed change very well. I've done clock scaling on StrongARM SA1100 CPUs (see signature), and I could change the clock speed from 59 to 265 MHz without problems. The proper implementation should change the value of loops_per_sec (in init/main.c), but the system actually survives well without the change.
Erik
-- LART. 250 MIPS under one Watt. Free hardware design files. http://www.lart.tudelft.nl/
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
| |