CVSROOT: /cvs
Module name: src
Changes by: uebay...@cvs.openbsd.org 2014/07/11 04:53:07
Modified files:
sys/arch/alpha/include: cpu.h
sys/arch/amd64/include: cpu.h
sys/arch/arm/include: cpu.h
sys/arch/hppa/include: cpu.h
sys/arch/hppa64/include: cpu.h
sys/arch/i386/include: cpu.h
sys/arch/m88k/include: cpu.h
sys/arch/mips64/include: cpu.h
sys/arch/powerpc/include: cpu.h
sys/arch/sh/include: cpu.h
sys/arch/sparc/sparc: cpuvar.h
sys/arch/sparc64/include: cpu.h
sys/arch/vax/include: cpu.h
Log message:
CPU_BUSY_CYCLE(): A new MI statement for busy loop power reduction
The new CPU_BUSY_CYCLE() may be put in a busy loop body so that CPU can reduce
power consumption, as Linux's cpu_relax() and FreeBSD's cpu_spinwait(). To
start minimally, use PAUSE on i386/amd64 and empty on others. The name is
chosen following the existing cpu_idle_*() functions. Naming and API may be
polished later.
OK kettenis@
