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Start profiling clock on new process before setting it running, in case 

there is a preemption.
This commit is contained in:
ad 2008-05-27 14:18:51 +00:00
parent b18c28f549
commit f985e88f2b
1 changed files with 12 additions and 14 deletions
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26
sys/kern/kern_fork.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: kern_fork.c,v 1.164 2008/05/19 17:06:02 ad Exp $ */
/* $NetBSD: kern_fork.c,v 1.165 2008/05/27 14:18:51 ad Exp $ */
/*-
* Copyright (c) 1999, 2001, 2004, 2006, 2007, 2008 The NetBSD Foundation, Inc.
@ -67,7 +67,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: kern_fork.c,v 1.164 2008/05/19 17:06:02 ad Exp $");
__KERNEL_RCSID(0, "$NetBSD: kern_fork.c,v 1.165 2008/05/27 14:18:51 ad Exp $");
#include "opt_ktrace.h"
@ -491,10 +491,19 @@ fork1(struct lwp *l1, int flags, int exitsig, void *stack, size_t stacksize,
tmp = (p2->p_userret != NULL ? LW_WUSERRET : 0);
mutex_enter(p2->p_lock);
/*
* Start profiling.
*/
if ((p2->p_stflag & PST_PROFIL) != 0) {
mutex_spin_enter(&p2->p_stmutex);
startprofclock(p2);
mutex_spin_exit(&p2->p_stmutex);
}
getmicrotime(&p2->p_stats->p_start);
p2->p_acflag = AFORK;
lwp_lock(l2);
if (p2->p_sflag & PS_STOPFORK) {
lwp_lock(l2);
p2->p_nrlwps = 0;
p2->p_stat = SSTOP;
p2->p_waited = 0;
@ -505,7 +514,6 @@ fork1(struct lwp *l1, int flags, int exitsig, void *stack, size_t stacksize,
} else {
p2->p_nrlwps = 1;
p2->p_stat = SACTIVE;
lwp_lock(l2);
l2->l_stat = LSRUN;
l2->l_flag |= tmp;
sched_enqueue(l2, false);
@ -514,16 +522,6 @@ fork1(struct lwp *l1, int flags, int exitsig, void *stack, size_t stacksize,
mutex_exit(proc_lock);
/*
* Start profiling.
*/
if ((p2->p_stflag & PST_PROFIL) != 0) {
mutex_spin_enter(&p2->p_stmutex);
startprofclock(p2);
mutex_spin_exit(&p2->p_stmutex);
}
/*
* Preserve synchronization semantics of vfork. If waiting for
* child to exec or exit, set PS_PPWAIT on child, and sleep on our