Module Name: src
Committed By: knakahara
Date: Fri Apr 3 03:05:39 UTC 2020
Modified Files:
src/sys/arch/x86/x86: tsc.c
Log Message:
Fix TSC drift is observed almost every time wrongly.
Ths "TSC drift" in tsc_tc_init() means the cpu_cc_skew delta between
first measurement (in cpu_start_secondary) and second measurement
(in cpu_boot_secondary), that is, the TSC drift is expected to be
almost zero. However, the second measument in current implementation
is added extra cpu_cc_skew accidentally, so current delta value means
almost cpu_cc_skew wrongly.
tsc_sync_bp and tsc_sync_ap should use rdtsc() to get raw values.
Advised by nonaka@n.o, thanks.
To generate a diff of this commit:
cvs rdiff -u -r1.38 -r1.39 src/sys/arch/x86/x86/tsc.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
