kern_clock.c File Reference

#include <sys/cdefs.h>
#include "opt_kdb.h"
#include "opt_device_polling.h"
#include "opt_hwpmc_hooks.h"
#include "opt_kdtrace.h"
#include "opt_ntp.h"
#include "opt_watchdog.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/callout.h>
#include <sys/kdb.h>
#include <sys/kernel.h>
#include <sys/kthread.h>
#include <sys/ktr.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/resource.h>
#include <sys/resourcevar.h>
#include <sys/sched.h>
#include <sys/sdt.h>
#include <sys/signalvar.h>
#include <sys/sleepqueue.h>
#include <sys/smp.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_map.h>
#include <sys/sysctl.h>
#include <sys/bus.h>
#include <sys/interrupt.h>
#include <sys/limits.h>
#include <sys/timetc.h>

Include dependency graph for kern_clock.c:

Go to the source code of this file.

Functions
	__FBSDID ("$BSDSUniX$")
static void	initclocks (void *dummy)
	SYSINIT (clocks, SI_SUB_CLOCKS, SI_ORDER_FIRST, initclocks, NULL)
	SDT_PROVIDER_DECLARE (sched)
	SDT_PROBE_DEFINE2 (sched,,, tick,"struct thread *","struct proc *")
static int	sysctl_kern_cp_time (SYSCTL_HANDLER_ARGS)
	SYSCTL_PROC (_kern, OID_AUTO, cp_time, CTLTYPE_LONG|CTLFLAG_RD|CTLFLAG_MPSAFE, 0, 0, sysctl_kern_cp_time,"LU","CPU time statistics")
static int	sysctl_kern_cp_times (SYSCTL_HANDLER_ARGS)
	SYSCTL_PROC (_kern, OID_AUTO, cp_times, CTLTYPE_LONG|CTLFLAG_RD|CTLFLAG_MPSAFE, 0, 0, sysctl_kern_cp_times,"LU","per-CPU time statistics")
void	read_cpu_time (long *cp_time)
static	DPCPU_DEFINE (int, pcputicks)
void	hardclock_cpu (int usermode)
void	hardclock (int usermode, uintfptr_t pc)
void	hardclock_cnt (int cnt, int usermode)
void	hardclock_sync (int cpu)
int	tvtohz (struct timeval *tv)
void	startprofclock (struct proc *p)
void	stopprofclock (struct proc *p)
void	statclock (int usermode)
void	statclock_cnt (int cnt, int usermode)
void	profclock (int usermode, uintfptr_t pc)
void	profclock_cnt (int cnt, int usermode, uintfptr_t pc)
static int	sysctl_kern_clockrate (SYSCTL_HANDLER_ARGS)
	SYSCTL_PROC (_kern, KERN_CLOCKRATE, clockrate, CTLTYPE_STRUCT|CTLFLAG_RD|CTLFLAG_MPSAFE, 0, 0, sysctl_kern_clockrate,"S,clockinfo","Rate and period of various kernel clocks")

Variables
static struct mtx	time_lock
static long	empty [CPUSTATES]
int	stathz
int	profhz
int	profprocs
volatile int	ticks
int	psratio
static int	global_hardclock_run = 0

Function Documentation

__FBSDID

(

"$BSDSUniX$"

)

static DPCPU_DEFINE ( int  , pcputicks    )

static

void hardclock	(	int	usermode,
		uintfptr_t	pc
	)

Definition at line 471 of file kern_clock.c.

References cpu_tick_calibration(), hardclock_cpu(), hardclock_device_poll(), profclock(), statclock(), and tc_ticktock().

Here is the call graph for this function:

void hardclock_cnt	(	int	cnt,
		int	usermode
	)

Definition at line 497 of file kern_clock.c.

References callout_tick(), clock, cpu_tick_calibration(), hardclock_device_poll(), itimerdecr(), sched_tick(), tc_ticktock(), tick, and ticks.

Referenced by handleevents().

Here is the call graph for this function:

Here is the caller graph for this function:

void hardclock_cpu

(

int

usermode

)

Definition at line 428 of file kern_clock.c.

References callout_tick(), clock, itimerdecr(), sched_tick(), and tick.

Referenced by hardclock().

Here is the call graph for this function:

Here is the caller graph for this function:

void hardclock_sync

(

int

cpu

)

Definition at line 579 of file kern_clock.c.

References ticks.

Referenced by configtimer(), and cpu_initclocks_ap().

Here is the caller graph for this function:

static void initclocks ( void *  dummy )

static

Definition at line 398 of file kern_clock.c.

References hz, mtx_init(), and time_lock.

Here is the call graph for this function:

void profclock	(	int	usermode,
		uintfptr_t	pc
	)

Definition at line 782 of file kern_clock.c.

References profclock_cnt().

Referenced by hardclock().

Here is the call graph for this function:

Here is the caller graph for this function:

void profclock_cnt	(	int	cnt,
		int	usermode,
		uintfptr_t	pc
	)

Definition at line 789 of file kern_clock.c.

References addupc_intr(), and clock.

Referenced by handleevents(), and profclock().

Here is the call graph for this function:

Here is the caller graph for this function:

void read_cpu_time

(

long *

cp_time

)

Definition at line 329 of file kern_clock.c.

References pcpu_find().

Referenced by sysctl_kern_cp_time().

Here is the call graph for this function:

Here is the caller graph for this function:

SDT_PROBE_DEFINE2	(	sched	,
		tick	,
		"struct thread *"	,
		"struct proc *"
	)

SDT_PROVIDER_DECLARE

(

sched

)

void startprofclock

(

struct proc *

p

)

Definition at line 652 of file kern_clock.c.

References cpu_startprofclock(), and time_lock.

Referenced by do_fork(), and sys_profil().

Here is the call graph for this function:

Here is the caller graph for this function:

void statclock

(

int

usermode

)

Definition at line 702 of file kern_clock.c.

References statclock_cnt().

Referenced by hardclock().

Here is the call graph for this function:

Here is the caller graph for this function:

void statclock_cnt	(	int	cnt,
		int	usermode
	)

Definition at line 709 of file kern_clock.c.

References clock, sched_clock(), sched_tdname(), and tick.

Referenced by handleevents(), and statclock().

Here is the call graph for this function:

Here is the caller graph for this function:

void stopprofclock

(

struct proc *

p

)

Definition at line 672 of file kern_clock.c.

References cpu_stopprofclock(), and time_lock.

Referenced by addupc_task(), do_execve(), exit1(), and sys_profil().

Here is the call graph for this function:

Here is the caller graph for this function:

static int sysctl_kern_clockrate ( SYSCTL_HANDLER_ARGS  )

static

Definition at line 832 of file kern_clock.c.

References hz, profhz, sysctl_handle_opaque(), and tick.

Here is the call graph for this function:

static int sysctl_kern_cp_time ( SYSCTL_HANDLER_ARGS  )

static

Definition at line 99 of file kern_clock.c.

References read_cpu_time().

Here is the call graph for this function:

static int sysctl_kern_cp_times ( SYSCTL_HANDLER_ARGS  )

static

Definition at line 132 of file kern_clock.c.

References empty, mp_maxid, and pcpu_find().

Here is the call graph for this function:

SYSCTL_PROC	(	_kern	,
		OID_AUTO	,
		cp_time	,
		CTLTYPE_LONG|CTLFLAG_RD|	CTLFLAG_MPSAFE,
		0	,
		0	,
		sysctl_kern_cp_time	,
		"LU"	,
		"CPU time statistics"
	)

SYSCTL_PROC	(	_kern	,
		OID_AUTO	,
		cp_times	,
		CTLTYPE_LONG|CTLFLAG_RD|	CTLFLAG_MPSAFE,
		0	,
		0	,
		sysctl_kern_cp_times	,
		"LU"	,
		"per-CPU time statistics"
	)

SYSCTL_PROC	(	_kern	,
		KERN_CLOCKRATE	,
		clockrate	,
		CTLTYPE_STRUCT|CTLFLAG_RD|	CTLFLAG_MPSAFE,
		0	,
		0	,
		sysctl_kern_clockrate	,
		"	S,
		clockinfo"	,
		"Rate and period of various kernel clocks"
	)

SYSINIT	(	clocks	,
		SI_SUB_CLOCKS	,
		SI_ORDER_FIRST	,
		initclocks	,
		NULL
	)

int tvtohz

(

struct timeval *

tv

)

Definition at line 590 of file kern_clock.c.

References printf(), tick, and ticks.

Referenced by do_cv_wait(), do_lock_umtx(), do_lock_umutex(), do_rw_rdlock2(), do_rw_wrlock2(), do_sem_wait(), do_wait(), kern_aio_suspend(), kern_aio_waitcomplete(), kern_nanosleep(), kern_select(), kern_sem_wait(), kern_setitimer(), kern_sigtimedwait(), kern_thr_suspend(), kqueue_scan(), mqueue_receive(), mqueue_send(), realitexpire(), realtimer_expire(), realtimer_settime(), selsocket(), sosetopt(), sys_poll(), timertoticks(), and ttydisc_read_raw_read_timer().

Here is the call graph for this function:

Here is the caller graph for this function:

Variable Documentation

long empty[CPUSTATES]

static

Definition at line 129 of file kern_clock.c.

Referenced by sysctl_kern_cp_times(), and turnstile_signal().

int global_hardclock_run = 0

static

Definition at line 391 of file kern_clock.c.

int profhz

Definition at line 385 of file kern_clock.c.

Referenced by cpu_initclocks_bsp(), setuptimer(), and sysctl_kern_clockrate().

int profprocs

Definition at line 386 of file kern_clock.c.

int psratio

Definition at line 388 of file kern_clock.c.

Referenced by userret().

int stathz

Definition at line 384 of file kern_clock.c.

Referenced by cpu_initclocks_bsp(), getnextcpuevent(), sched_initticks(), and setuptimer().

volatile int ticks

Definition at line 387 of file kern_clock.c.

Referenced by addupc_intr(), addupc_task(), cache_enter_time(), cache_lookup_times(), callout_cc_add(), callout_tick(), do_fork(), fill_kinfo_proc_only(), fill_kinfo_thread(), hardclock_cnt(), hardclock_sync(), mi_switch(), ppsratecheck(), proc0_post(), sched_pctcpu_update(), sched_sleep(), sched_switch(), sched_throw(), sched_wakeup(), schedinit(), should_yield(), taskqueue_enqueue_timeout(), thread_exit(), turnstile_wait(), and tvtohz().

struct mtx time_lock

static

Definition at line 93 of file kern_clock.c.

Referenced by initclocks(), startprofclock(), and stopprofclock().