mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-21 11:13:30 +00:00
113 lines
2.1 KiB
C
113 lines
2.1 KiB
C
/*-
|
|
* Copyright (c) 2000, All rights reserved. See /usr/src/COPYRIGHT
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include "opt_ktrace.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/ktr.h>
|
|
#include <sys/signalvar.h>
|
|
#include <sys/resourcevar.h>
|
|
#include <sys/vmmeter.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/unistd.h>
|
|
#include <sys/ipl.h>
|
|
#include <sys/kthread.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/queue.h>
|
|
#include <sys/eventhandler.h>
|
|
#include <vm/vm.h>
|
|
#include <vm/vm_extern.h>
|
|
#ifdef KTRACE
|
|
#include <sys/uio.h>
|
|
#include <sys/ktrace.h>
|
|
#endif
|
|
|
|
#include <machine/cpu.h>
|
|
#include <machine/md_var.h>
|
|
#include <machine/smp.h>
|
|
|
|
#include <machine/globaldata.h>
|
|
#include <machine/globals.h>
|
|
|
|
static void idle_setup(void *dummy);
|
|
SYSINIT(idle_setup, SI_SUB_SCHED_IDLE, SI_ORDER_FIRST, idle_setup, NULL)
|
|
|
|
static void idle_proc(void *dummy);
|
|
|
|
/*
|
|
* setup per-cpu idle process contexts
|
|
*/
|
|
static void
|
|
idle_setup(void *dummy)
|
|
{
|
|
struct globaldata *gd;
|
|
int error;
|
|
|
|
SLIST_FOREACH(gd, &cpuhead, gd_allcpu) {
|
|
#ifdef SMP
|
|
error = kthread_create(idle_proc, NULL, &gd->gd_idleproc,
|
|
RFSTOPPED|RFHIGHPID, "idle: cpu%d",
|
|
gd->gd_cpuid);
|
|
#else
|
|
error = kthread_create(idle_proc, NULL, &gd->gd_idleproc,
|
|
RFSTOPPED|RFHIGHPID, "idle");
|
|
#endif
|
|
if (error)
|
|
panic("idle_setup: kthread_create error %d\n", error);
|
|
|
|
gd->gd_idleproc->p_flag |= P_NOLOAD;
|
|
gd->gd_idleproc->p_stat = SRUN;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* idle process context
|
|
*/
|
|
static void
|
|
idle_proc(void *dummy)
|
|
{
|
|
#ifdef DIAGNOSTIC
|
|
int count;
|
|
#endif
|
|
|
|
for (;;) {
|
|
mtx_assert(&Giant, MA_NOTOWNED);
|
|
|
|
#ifdef DIAGNOSTIC
|
|
count = 0;
|
|
|
|
while (count >= 0 && procrunnable() == 0) {
|
|
#else
|
|
while (procrunnable() == 0) {
|
|
#endif
|
|
/*
|
|
* This is a good place to put things to be done in
|
|
* the background, including sanity checks.
|
|
*/
|
|
|
|
#ifdef DIAGNOSTIC
|
|
if (count++ < 0)
|
|
CTR0(KTR_PROC, "idle_proc: timed out waiting"
|
|
" for a process");
|
|
#endif
|
|
|
|
if (vm_page_zero_idle() != 0)
|
|
continue;
|
|
|
|
#ifdef __i386__
|
|
cpu_idle();
|
|
#endif
|
|
}
|
|
|
|
mtx_enter(&sched_lock, MTX_SPIN);
|
|
mi_switch();
|
|
mtx_exit(&sched_lock, MTX_SPIN);
|
|
}
|
|
}
|