svn commit: r221178 - head/sys/x86/x86

[Jung-uk Kim]

Author: jkim
Date: Thu Apr 28 17:56:02 2011
New Revision: 221178
URL: http://svn.freebsd.org/changeset/base/221178

Log:
  Turn off periodic recalibration of CPU ticker frequency if it is invariant.

Modified:
  head/sys/x86/x86/tsc.c

Modified: head/sys/x86/x86/tsc.c
==============================================================================
--- head/sys/x86/x86/tsc.c	Thu Apr 28 17:44:24 2011	(r221177)
+++ head/sys/x86/x86/tsc.c	Thu Apr 28 17:56:02 2011	(r221178)
@@ -228,7 +228,7 @@ init_TSC(void)
 	 * discovers a new max frequency.
 	 */
 	if (tsc_freq != 0)
-		set_cputicker(rdtsc, tsc_freq, 1);
+		set_cputicker(rdtsc, tsc_freq, !tsc_is_invariant);
 
 	if (tsc_is_invariant)
 		return;