Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Optimise canonicalisation of l_rtime for the case when the start and stop 

times are in the same second.
This commit is contained in:
dsl 2007-02-18 16:03:06 +00:00
parent 5f2083f440
commit ff6d800c8f
1 changed files with 11 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
sys/kern/kern_synch.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: kern_synch.c,v 1.178 2007/02/17 22:31:43 pavel Exp $ */
/* $NetBSD: kern_synch.c,v 1.179 2007/02/18 16:03:06 dsl Exp $ */
/*-
* Copyright (c) 1999, 2000, 2004, 2006, 2007 The NetBSD Foundation, Inc.
@ -74,7 +74,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: kern_synch.c,v 1.178 2007/02/17 22:31:43 pavel Exp $");
__KERNEL_RCSID(0, "$NetBSD: kern_synch.c,v 1.179 2007/02/18 16:03:06 dsl Exp $");
#include "opt_ddb.h"
#include "opt_kstack.h"
@ -96,6 +96,7 @@ __KERNEL_RCSID(0, "$NetBSD: kern_synch.c,v 1.178 2007/02/17 22:31:43 pavel Exp $
#include <sys/signalvar.h>
#include <sys/resourcevar.h>
#include <sys/sched.h>
#include <sys/syscall_stats.h>
#include <sys/kauth.h>
#include <sys/sleepq.h>
#include <sys/lockdebug.h>
@ -635,12 +636,14 @@ mi_switch(struct lwp *l, struct lwp *newl)
u = l->l_rtime.tv_usec +
(tv.tv_usec - spc->spc_runtime.tv_usec);
s = l->l_rtime.tv_sec + (tv.tv_sec - spc->spc_runtime.tv_sec);
if (u < 0) {
u += 1000000;
s--;
} else if (u >= 1000000) {
u -= 1000000;
s++;
if (u < 0 || u >= 1000000) {
if (u < 0) {
u += 1000000;
s--;
} else {
u -= 1000000;
s++;
}
}
l->l_rtime.tv_usec = u;
l->l_rtime.tv_sec = s;