FreeBSD kernel kern code: kern/kern_switch.c File Reference

FreeBSD kernel kern code

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

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Macros
#define	KTR_CRITICAL 0

Functions
	__FBSDID ("$FreeBSD$")

	CTASSERT ((RQB_BPW *RQB_LEN)==RQ_NQS)

	SYSCTL_INT (_kern_sched, OID_AUTO, preemption, CTLFLAG_RD, &kern_sched_preemption, 0, "Kernel preemption enabled")

static __noinline struct thread *	choosethread_panic (struct thread *td)

struct thread *	choosethread (void)

void	critical_enter_KBI (void)

void __noinline	critical_exit_preempt (void)

void	critical_exit_KBI (void)

void	runq_init (struct runq *rq)

static __inline void	runq_clrbit (struct runq *rq, int pri)

static __inline int	runq_findbit (struct runq *rq)

static __inline int	runq_findbit_from (struct runq *rq, u_char pri)

static __inline void	runq_setbit (struct runq *rq, int pri)

void	runq_add (struct runq rq, struct thread td, int flags)

void	runq_add_pri (struct runq rq, struct thread td, u_char pri, int flags)

int	runq_check (struct runq *rq)

struct thread *	runq_choose_fuzz (struct runq *rq, int fuzz)

struct thread *	runq_choose (struct runq *rq)

struct thread *	runq_choose_from (struct runq *rq, u_char idx)

void	runq_remove (struct runq rq, struct thread td)

void	runq_remove_idx (struct runq rq, struct thread td, u_char *idx)

Variables
static int	kern_sched_preemption = 0

Macro Definition Documentation

◆ KTR_CRITICAL

#define KTR_CRITICAL 0

Definition at line 53 of file kern_switch.c.

Function Documentation

◆ __FBSDID()

__FBSDID ( "$FreeBSD$" )

◆ choosethread()

struct thread * choosethread ( void )

Definition at line 180 of file kern_switch.c.

References choosethread_panic(), and sched_choose().

Referenced by sched_switch(), sched_throw_grab(), and sched_throw_tail().

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◆ choosethread_panic()

static __noinline struct thread * choosethread_panic ( struct thread * td )

static

Definition at line 159 of file kern_switch.c.

References sched_choose().

Referenced by choosethread().

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◆ critical_enter_KBI()

void critical_enter_KBI ( void )

Definition at line 204 of file kern_switch.c.

References KTR_CRITICAL.

◆ critical_exit_KBI()

void critical_exit_KBI ( void )

Definition at line 249 of file kern_switch.c.

References KTR_CRITICAL.

◆ critical_exit_preempt()

void __noinline critical_exit_preempt ( void )

Definition at line 215 of file kern_switch.c.

References flags, kdb_active, and mi_switch().

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◆ CTASSERT()

CTASSERT ( (RQB_BPW *RQB_LEN) = =RQ_NQS )

◆ runq_add()

void runq_add	(	struct runq *	rq,
		struct thread *	td,
		int	flags
	)

Definition at line 369 of file kern_switch.c.

References flags, and runq_setbit().

Referenced by sched_add(), and tdq_runq_add().

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◆ runq_add_pri()

void runq_add_pri	(	struct runq *	rq,
		struct thread *	td,
		u_char	pri,
		int	flags
	)

Definition at line 388 of file kern_switch.c.

References flags, and runq_setbit().

Referenced by tdq_runq_add().

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◆ runq_check()

int runq_check ( struct runq * rq )

Definition at line 410 of file kern_switch.c.

Referenced by sched_runnable().

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◆ runq_choose()

struct thread * runq_choose ( struct runq * rq )

Definition at line 473 of file kern_switch.c.

References runq_findbit().

Referenced by sched_choose(), and tdq_choose().

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◆ runq_choose_from()

struct thread * runq_choose_from	(	struct runq *	rq,
		u_char	idx
	)

Definition at line 493 of file kern_switch.c.

References runq_findbit_from().

Referenced by tdq_choose().

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◆ runq_choose_fuzz()

struct thread * runq_choose_fuzz	(	struct runq *	rq,
		int	fuzz
	)

Definition at line 431 of file kern_switch.c.

References count, and runq_findbit().

Referenced by sched_choose().

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◆ runq_clrbit()

static __inline void runq_clrbit	(	struct runq *	rq,
		int	pri
	)

static

Definition at line 280 of file kern_switch.c.

Referenced by runq_remove_idx().

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◆ runq_findbit()

static __inline int runq_findbit ( struct runq * rq )

static

Definition at line 297 of file kern_switch.c.

Referenced by runq_choose(), and runq_choose_fuzz().

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◆ runq_findbit_from()

static __inline int runq_findbit_from	(	struct runq *	rq,
		u_char	pri
	)

static

Definition at line 316 of file kern_switch.c.

References mask.

Referenced by runq_choose_from().

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◆ runq_init()

void runq_init ( struct runq * rq )

Definition at line 266 of file kern_switch.c.

Referenced by setup_runqs(), and tdq_setup().

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◆ runq_remove()

void runq_remove	(	struct runq *	rq,
		struct thread *	td
	)

Definition at line 518 of file kern_switch.c.

References runq_remove_idx().

Referenced by sched_choose(), sched_rem(), and tdq_runq_rem().

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◆ runq_remove_idx()

void runq_remove_idx	(	struct runq *	rq,
		struct thread *	td,
		u_char *	idx
	)

Definition at line 525 of file kern_switch.c.

References runq_clrbit().

Referenced by runq_remove(), and tdq_runq_rem().

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◆ runq_setbit()

static __inline void runq_setbit	(	struct runq *	rq,
		int	pri
	)

static

Definition at line 352 of file kern_switch.c.

Referenced by runq_add(), and runq_add_pri().

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◆ SYSCTL_INT()

SYSCTL_INT	(	_kern_sched	,
		OID_AUTO	,
		preemption	,
		CTLFLAG_RD	,
		&	kern_sched_preemption,
		0	,
		"Kernel preemption enabled"
	)

Variable Documentation

◆ kern_sched_preemption

int kern_sched_preemption = 0

static

Definition at line 72 of file kern_switch.c.

kern
kern_switch.c
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