CVSROOT: /cvs
Module name: src
Changes by: [email protected] 2024/02/12 15:07:33
Modified files:
sys/kern : kern_clock.c kern_clockintr.c
Log message:
kernel: disable hardclock() on secondary CPUs
There is no useful work left for secondary CPUs to do in hardclock().
Disable cq_hardclock on secondary CPUs and remove the now-unnecessary
early-return from hardclock().
This change reduces every system's normal clock interrupt rate by
(HZ - HZ/10) per secondary CPU. For example, an 8-core machine
with a HZ=100 kernel should see its clock interrupt rate drop from
~1600 to ~960.
Thread: https://marc.info/?l=openbsd-tech&m=170750140915898&w=2
ok kettenis@
