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From: Alexander Motin <mav@FreeBSD.org>
Date: Fri, 1 Mar 2013 19:54:26 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-projects@freebsd.org
Subject: svn commit: r247569 - projects/calloutng/sys/kern
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Author: mav
Date: Fri Mar  1 19:54:25 2013
New Revision: 247569
URL: http://svnweb.freebsd.org/changeset/base/247569

Log:
  Don't disable interrupts on 64-bit arches to read the last hardclock time.
  This adds few more megabits in iperf test on Atom D525.

Modified:
  projects/calloutng/sys/kern/kern_timeout.c

Modified: projects/calloutng/sys/kern/kern_timeout.c
==============================================================================
--- projects/calloutng/sys/kern/kern_timeout.c	Fri Mar  1 19:42:50 2013	(r247568)
+++ projects/calloutng/sys/kern/kern_timeout.c	Fri Mar  1 19:54:25 2013	(r247569)
@@ -924,10 +924,14 @@ callout_reset_sbt_on(struct callout *c, 
 			 * This value is per-CPU, but it is equal for all
 			 * active ones.
 			 */
+#ifdef __LP64__
+			to_sbt = DPCPU_GET(hardclocktime);
+#else
 			spinlock_enter();
 			to_sbt = DPCPU_GET(hardclocktime);
 			spinlock_exit();
 #endif
+#endif
 			if ((flags & C_HARDCLOCK) == 0)
 				to_sbt += tick_sbt;
 		} else