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- Honor the PREEMPTION and FULL_PREEMPTION flags by setting the default

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value for kern.sched.preempt_thresh appropriately.  It can still by
   adjusted at runtime.  ULE will still use IPI_PREEMPT in certain
   migration situations.
 - Assert that we're not trying to compile ULE on an unsupported
   architecture.  To date, I believe only i386 and amd64 have implemented
   the third cpu switch argument required.

Approved by:	re
This commit is contained in:
Jeff Roberson 2007-09-27 16:39:27 +00:00
parent 45099be671
commit 02e2d6b445
1 changed files with 10 additions and 2 deletions
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12
sys/kern/sched_ule.c
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@ -71,8 +71,8 @@ __FBSDID("$FreeBSD$");
#include <machine/cpu.h>
#include <machine/smp.h>
#ifndef PREEMPTION
#error "SCHED_ULE requires options PREEMPTION"
#if !defined(__i386__) && !defined(__amd64__)
#error "This architecture is not currently compatible with ULE"
#endif
#define KTR_ULE 0
@ -174,7 +174,15 @@ static int sched_interact = SCHED_INTERACT_THRESH;
static int realstathz;
static int tickincr;
static int sched_slice;
#ifdef PREEMPTION
#ifdef FULL_PREEMPTION
static int preempt_thresh = PRI_MAX_IDLE;
#else
static int preempt_thresh = PRI_MIN_KERN;
#endif
#else
static int preempt_thresh = 0;
#endif
/*
* tdq - per processor runqs and statistics. All fields are protected by the