subr_smp.c File Reference

#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/ktr.h>
#include <sys/proc.h>
#include <sys/bus.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/pcpu.h>
#include <sys/smp.h>
#include <sys/sysctl.h>
#include <machine/cpu.h>
#include <machine/smp.h>
#include "opt_sched.h"

Include dependency graph for subr_smp.c:

Go to the source code of this file.

Functions
	__FBSDID ("$BSDSUniX$")
static	SYSCTL_NODE (_kern, OID_AUTO, smp, CTLFLAG_RD|CTLFLAG_CAPRD, NULL,"Kernel SMP")
	SYSCTL_INT (_kern_smp, OID_AUTO, maxid, CTLFLAG_RD|CTLFLAG_CAPRD,&mp_maxid, 0,"Max CPU ID.")
	SYSCTL_INT (_kern_smp, OID_AUTO, maxcpus, CTLFLAG_RD|CTLFLAG_CAPRD,&mp_maxcpus, 0,"Max number of CPUs that the system was compiled for.")
	SYSCTL_INT (_kern_smp, OID_AUTO, active, CTLFLAG_RW,&smp_active, 0,"Number of Auxillary Processors (APs) that were successfully started")
	SYSCTL_INT (_kern_smp, OID_AUTO, disabled, CTLFLAG_RDTUN|CTLFLAG_CAPRD,&smp_disabled, 0,"SMP has been disabled from the loader")
	TUNABLE_INT ("kern.smp.disabled",&smp_disabled)
	SYSCTL_INT (_kern_smp, OID_AUTO, cpus, CTLFLAG_RD|CTLFLAG_CAPRD,&smp_cpus, 0,"Number of CPUs online")
	SYSCTL_INT (_kern_smp, OID_AUTO, topology, CTLFLAG_RD,&smp_topology, 0,"Topology override setting; 0 is default provided by hardware.")
	TUNABLE_INT ("kern.smp.topology",&smp_topology)
void	smp_rendezvous_cpus (cpuset_t map, void(*setup_func)(void *), void(*action_func)(void *), void(*teardown_func)(void *), void *arg)
void	smp_rendezvous (void(*setup_func)(void *), void(*action_func)(void *), void(*teardown_func)(void *), void *arg)
static void	mp_setvariables_for_up (void *dummy)
	SYSINIT (cpu_mp_setvariables, SI_SUB_TUNABLES, SI_ORDER_FIRST, mp_setvariables_for_up, NULL)
void	smp_no_rendevous_barrier (void *dummy)

Variables
cpuset_t	all_cpus
int	mp_ncpus
int	mp_maxcpus = MAXCPU
volatile int	smp_started
u_int	mp_maxid
int	smp_active = 0
int	smp_disabled = 0
int	smp_cpus = 1
int	smp_topology = 0

Function Documentation

__FBSDID

(

"$BSDSUniX$"

)

static void mp_setvariables_for_up ( void *  dummy )

static

Definition at line 707 of file subr_smp.c.

References all_cpus, mp_maxid, and mp_ncpus.

void smp_no_rendevous_barrier

(

void *

dummy

)

Definition at line 719 of file subr_smp.c.

References smp_started.

Referenced by _rm_wlock().

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void smp_rendezvous	(	void(*)(void *)	setup_func,
		void(*)(void *)	action_func,
		void(*)(void *)	teardown_func,
		void *	arg
	)

Definition at line 685 of file subr_smp.c.

void smp_rendezvous_cpus	(	cpuset_t	map,
		void(*)(void *)	setup_func,
		void(*)(void *)	action_func,
		void(*)(void *)	teardown_func,
		void *	arg
	)

Definition at line 664 of file subr_smp.c.

Referenced by _rm_wlock().

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SYSCTL_INT	(	_kern_smp	,
		OID_AUTO	,
		maxid	,
		CTLFLAG_RD|	CTLFLAG_CAPRD,
		&	mp_maxid,
		0	,
		"Max CPU ID."
	)

SYSCTL_INT	(	_kern_smp	,
		OID_AUTO	,
		maxcpus	,
		CTLFLAG_RD|	CTLFLAG_CAPRD,
		&	mp_maxcpus,
		0	,
		"Max number of CPUs that the system was compiled for."
	)

SYSCTL_INT	(	_kern_smp	,
		OID_AUTO	,
		active	,
		CTLFLAG_RW	,
		&	smp_active,
		0	,
		"Number of Auxillary Processors (APs) that were successfully started"
	)

SYSCTL_INT	(	_kern_smp	,
		OID_AUTO	,
		disabled	,
		CTLFLAG_RDTUN|	CTLFLAG_CAPRD,
		&	smp_disabled,
		0	,
		"SMP has been disabled from the loader"
	)

SYSCTL_INT	(	_kern_smp	,
		OID_AUTO	,
		cpus	,
		CTLFLAG_RD|	CTLFLAG_CAPRD,
		&	smp_cpus,
		0	,
		"Number of CPUs online"
	)

SYSCTL_INT	(	_kern_smp	,
		OID_AUTO	,
		topology	,
		CTLFLAG_RD	,
		&	smp_topology,
		0	,
		"Topology override setting; 0 is default provided by hardware."
	)

static SYSCTL_NODE ( _kern  , OID_AUTO  , smp  , CTLFLAG_RD|  CTLFLAG_CAPRD, NULL  , "Kernel SMP"    )

static

SYSINIT	(	cpu_mp_setvariables	,
		SI_SUB_TUNABLES	,
		SI_ORDER_FIRST	,
		mp_setvariables_for_up	,
		NULL
	)

TUNABLE_INT	(	"kern.smp.disabled"	,
		&	smp_disabled
	)

TUNABLE_INT	(	"kern.smp.topology"	,
		&	smp_topology
	)

Variable Documentation

cpuset_t all_cpus

Definition at line 61 of file subr_smp.c.

Referenced by _rm_wlock(), cpuset_init(), kdb_trap(), mp_setvariables_for_up(), panic(), and rm_init_flags().

int mp_maxcpus = MAXCPU

Definition at line 65 of file subr_smp.c.

u_int mp_maxid

Definition at line 68 of file subr_smp.c.

Referenced by mp_setvariables_for_up(), pmc_cpu_max(), and sysctl_kern_cp_times().

int mp_ncpus

Definition at line 63 of file subr_smp.c.

Referenced by bsdsunix_fixup(), cf_set_method(), dpcpu_copy(), mp_setvariables_for_up(), sysctl_dpcpu_int(), sysctl_dpcpu_long(), and sysctl_dpcpu_quad().

int smp_active = 0

Definition at line 79 of file subr_smp.c.

Referenced by cf_set_method().

int smp_cpus = 1

Definition at line 88 of file subr_smp.c.

Referenced by umtxq_busy().

int smp_disabled = 0

Definition at line 83 of file subr_smp.c.

volatile int smp_started

Definition at line 67 of file subr_smp.c.

Referenced by configtimer(), sched_add(), smp_no_rendevous_barrier(), and timercb().

int smp_topology = 0

Definition at line 92 of file subr_smp.c.