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If DEBUG is enabled, drop kpreempt_pri to zero. It means that every

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wakeup will cause a kernel preemption, simulating massive concurrency.

Proposed on tech-kern@.
This commit is contained in:
ad 2009-03-02 21:17:29 +00:00
parent 5a51ec05b3
commit 822f68cc07
1 changed files with 7 additions and 3 deletions
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10
sys/kern/kern_runq.c
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@ -1,4 +1,4 @@
/* $NetBSD: kern_runq.c,v 1.25 2009/02/17 22:00:14 rmind Exp $ */ /* $NetBSD: kern_runq.c,v 1.26 2009/03/02 21:17:29 ad Exp $ */
/* /*
* Copyright (c) 2007, 2008 Mindaugas Rasiukevicius <rmind at NetBSD org> * Copyright (c) 2007, 2008 Mindaugas Rasiukevicius <rmind at NetBSD org>
@ -27,7 +27,7 @@
*/ */
#include <sys/cdefs.h> #include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: kern_runq.c,v 1.25 2009/02/17 22:00:14 rmind Exp $"); __KERNEL_RCSID(0, "$NetBSD: kern_runq.c,v 1.26 2009/03/02 21:17:29 ad Exp $");
#include <sys/param.h> #include <sys/param.h>
#include <sys/kernel.h> #include <sys/kernel.h>
@ -100,8 +100,12 @@ static void sched_balance(void *);
* Preemption control. * Preemption control.
*/ */
int sched_upreempt_pri = PRI_KERNEL; int sched_upreempt_pri = PRI_KERNEL;
#if defined(__HAVE_PREEMPTION) #ifdef __HAVE_PREEMPTION
# ifdef DEBUG
int sched_kpreempt_pri = 0;
# else
int sched_kpreempt_pri = PRI_USER_RT; int sched_kpreempt_pri = PRI_USER_RT;
# endif
#else #else
int sched_kpreempt_pri = 1000; int sched_kpreempt_pri = 1000;
#endif #endif