Module Name: src
Committed By: rin
Date: Tue Oct 4 13:45:50 UTC 2022
Modified Files:
src/sys/arch/powerpc/ibm4xx: copyinstr.c copyoutstr.c trap.c
Log Message:
copy{in,out}{,str}: Drop needless dcbst.
Data cache is purely physical for 40[53] with 16KB pages, and therefore
no need to flush cache before context switch.
This significantly improves copy{in,out} against small data; for example,
bytebench on DHT becomes:
-Pipe Throughput 12440.0 8826.1 7.1
+Pipe Throughput 12440.0 18364.8 14.8
No performance/ATF regression observed on 405. 403 boots successfully
into multiuser mode, and builds some packages.
To generate a diff of this commit:
cvs rdiff -u -r1.18 -r1.19 src/sys/arch/powerpc/ibm4xx/copyinstr.c \
src/sys/arch/powerpc/ibm4xx/copyoutstr.c
cvs rdiff -u -r1.99 -r1.100 src/sys/arch/powerpc/ibm4xx/trap.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
