Re: MMX for kernel

Alan Cox (
Sat, 8 Feb 1997 01:06:05 +0000 (GMT)

> and what about runnung 2+ FP cmopute jobs on a dual-PPro200 (SMP) machine ?
> how often do processes switch from one CPU to another needing to save/reload
> FPU registers and hardware faults ?

The kernel weights a process to avoid it flipping CPU's casually. On the SMP
kernel we don't do lazy safe/restore because we may need to do cross CPUr
restores quite often which gets expensive.