Module Name: src
Committed By: ad
Date: Fri Nov 22 23:36:25 UTC 2019
Modified Files:
src/sys/arch/amd64/amd64: locore.S
src/sys/arch/x86/x86: cpu.c
Log Message:
- On-demand zeroing pages with MOVNTI is crazy. It empties L1/L2/L3.
- Disable zeroing in the idle loop. That needs a cache-friendly strategy.
Result: 3 to 4% reduction in kernel build time on my test system.
Inspired by a discussion with Mateusz Guzik and David Maxwell.
To generate a diff of this commit:
cvs rdiff -u -r1.191 -r1.192 src/sys/arch/amd64/amd64/locore.S
cvs rdiff -u -r1.174 -r1.175 src/sys/arch/x86/x86/cpu.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
