Author: jkim
Date: Tue Oct 21 04:31:07 2008
New Revision: 184108
URL: http://svn.freebsd.org/changeset/base/184108
Log:
Fix 'kern.timeconter.invariant_tsc' tunable and back out a redundant hack.
Somehow incomplete version was committed. :-(
Modified:
head/sys/i386/i386/tsc.c
Modified: head/sys/i386/i386/tsc.c
==============================================================================
--- head/sys/i386/i386/tsc.c Tue Oct 21 03:18:02 2008 (r184107)
+++ head/sys/i386/i386/tsc.c Tue Oct 21 04:31:07 2008 (r184108)
@@ -53,7 +53,8 @@ u_int tsc_present;
static eventhandler_tag tsc_levels_tag, tsc_pre_tag, tsc_post_tag;
SYSCTL_INT(_kern_timecounter, OID_AUTO, invariant_tsc, CTLFLAG_RDTUN,
- &tsc_is_invariant, 0, "Indicates the TSC is P-state invariant");
+ &tsc_is_invariant, 0, "Indicates whether the TSC is P-state invariant");
+TUNABLE_INT("kern.timecounter.invariant_tsc", &tsc_is_invariant);
#ifdef SMP
static int smp_tsc;
@@ -111,9 +112,8 @@ init_TSC(void)
set_cputicker(rdtsc, tsc_freq, 1);
/* Register to find out about changes in CPU frequency. */
- if (!tsc_is_invariant)
- tsc_pre_tag = EVENTHANDLER_REGISTER(cpufreq_pre_change,
- tsc_freq_changing, NULL, EVENTHANDLER_PRI_FIRST);
+ tsc_pre_tag = EVENTHANDLER_REGISTER(cpufreq_pre_change,
+ tsc_freq_changing, NULL, EVENTHANDLER_PRI_FIRST);
tsc_post_tag = EVENTHANDLER_REGISTER(cpufreq_post_change,
tsc_freq_changed, NULL, EVENTHANDLER_PRI_FIRST);
tsc_levels_tag = EVENTHANDLER_REGISTER(cpufreq_levels_changed,
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