details: https://anonhg.NetBSD.org/src/rev/397fa9b541c1
branches: trunk
changeset: 940614:397fa9b541c1
user: thorpej <thorpej%NetBSD.org@localhost>
date: Sun Oct 11 18:39:09 2020 +0000
description:
Call cpu_initclocks() before registering the default timecounter,
in case it updates hz. If hz changes, recalculate tick and tickadj.
diffstat:
sys/kern/kern_clock.c | 17 ++++++++++++++---
1 files changed, 14 insertions(+), 3 deletions(-)
diffs (44 lines):
diff -r d5f68279d3d3 -r 397fa9b541c1 sys/kern/kern_clock.c
--- a/sys/kern/kern_clock.c Sun Oct 11 17:49:07 2020 +0000
+++ b/sys/kern/kern_clock.c Sun Oct 11 18:39:09 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: kern_clock.c,v 1.141 2020/05/08 22:10:09 ad Exp $ */
+/* $NetBSD: kern_clock.c,v 1.142 2020/10/11 18:39:09 thorpej Exp $ */
/*-
* Copyright (c) 2000, 2004, 2006, 2007, 2008 The NetBSD Foundation, Inc.
@@ -69,7 +69,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kern_clock.c,v 1.141 2020/05/08 22:10:09 ad Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kern_clock.c,v 1.142 2020/10/11 18:39:09 thorpej Exp $");
#ifdef _KERNEL_OPT
#include "opt_dtrace.h"
@@ -178,13 +178,24 @@
* code do its bit.
*/
psdiv = 1;
+
+ /*
+ * Call cpu_initclocks() before registering the default
+ * timecounter, in case it needs to adjust hz.
+ */
+ const int old_hz = hz;
+ cpu_initclocks();
+ if (old_hz != hz) {
+ tick = 1000000 / hz;
+ tickadj = (240000 / (60 * hz)) ? (240000 / (60 * hz)) : 1;
+ }
+
/*
* provide minimum default time counter
* will only run at interrupt resolution
*/
intr_timecounter.tc_frequency = hz;
tc_init(&intr_timecounter);
- cpu_initclocks();
/*
* Compute profhz and stathz, fix profhz if needed.