Module Name:	syssrc
Committed By:	thorpej
Date:		Fri Aug 16 15:25:55 UTC 2002

Modified Files:
	syssrc/sys/arch/arm/arm: cpufunc.c
	syssrc/sys/arch/arm/arm32: arm32_machdep.c cpuswitch.S
	syssrc/sys/arch/arm/include: cpu.h

Log Message:
* Add a new machdep.powersave sysctl, which controls the use of
  the CPU's "sleep" function in the idle loop.
* Default all CPUs to not use powersave, except for the PDA processors
  (SA11x0 and PXA2x0).

This significantly reduces inteterrupt latency in high-performance
applications (and was good to squeeze another ~10% out of an XScale
IOP on a Gig-E benchmark).


To generate a diff of this commit:
cvs rdiff -r1.51 -r1.52 syssrc/sys/arch/arm/arm/cpufunc.c
cvs rdiff -r1.24 -r1.25 syssrc/sys/arch/arm/arm32/arm32_machdep.c
cvs rdiff -r1.14 -r1.15 syssrc/sys/arch/arm/arm32/cpuswitch.S
cvs rdiff -r1.28 -r1.29 syssrc/sys/arch/arm/include/cpu.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.