kern_time.c File Reference

#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/limits.h>
#include <sys/clock.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/sysproto.h>
#include <sys/eventhandler.h>
#include <sys/resourcevar.h>
#include <sys/signalvar.h>
#include <sys/kernel.h>
#include <sys/syscallsubr.h>
#include <sys/sysctl.h>
#include <sys/sysent.h>
#include <sys/priv.h>
#include <sys/proc.h>
#include <sys/posix4.h>
#include <sys/time.h>
#include <sys/timers.h>
#include <sys/timetc.h>
#include <sys/vnode.h>
#include <vm/vm.h>
#include <vm/vm_extern.h>

Include dependency graph for kern_time.c:

Go to the source code of this file.

Data Structures
struct	clock_getcpuclockid2_args
struct	clock_gettime_args
struct	clock_settime_args
struct	clock_getres_args
struct	nanosleep_args
struct	gettimeofday_args
struct	settimeofday_args
struct	getitimer_args
struct	setitimer_args
struct	ktimer_create_args
struct	ktimer_delete_args
struct	ktimer_settime_args
struct	ktimer_gettime_args
struct	timer_getoverrun_args

Macros
#define	MAX_CLOCKS   (CLOCK_MONOTONIC+1)
#define	CPUCLOCK_BIT   0x80000000
#define	CPUCLOCK_PROCESS_BIT   0x40000000
#define	CPUCLOCK_ID_MASK   (~(CPUCLOCK_BIT|CPUCLOCK_PROCESS_BIT))
#define	MAKE_THREAD_CPUCLOCK(tid)   (CPUCLOCK_BIT|(tid))
#define	MAKE_PROCESS_CPUCLOCK(pid)   (CPUCLOCK_BIT|CPUCLOCK_PROCESS_BIT|(pid))
#define	CLOCK_CALL(clock, call, arglist)   ((*posix_clocks[clock].call) arglist)

Functions
	__FBSDID ("$BSDSUniX$")
static int	settime (struct thread *, struct timeval *)
static void	timevalfix (struct timeval *)
static void	itimer_start (void)
static int	itimer_init (void *, int, int)
static void	itimer_fini (void *, int)
static void	itimer_enter (struct itimer *)
static void	itimer_leave (struct itimer *)
static struct itimer *	itimer_find (struct proc *, int)
static void	itimers_alloc (struct proc *)
static void	itimers_event_hook_exec (void *arg, struct proc *p, struct image_params *imgp)
static void	itimers_event_hook_exit (void *arg, struct proc *p)
static int	realtimer_create (struct itimer *)
static int	realtimer_gettime (struct itimer *, struct itimerspec *)
static int	realtimer_settime (struct itimer *, int, struct itimerspec *, struct itimerspec *)
static int	realtimer_delete (struct itimer *)
static void	realtimer_clocktime (clockid_t, struct timespec *)
static void	realtimer_expire (void *)
int	register_posix_clock (int, struct kclock *)
void	itimer_fire (struct itimer *it)
int	itimespecfix (struct timespec *ts)
	SYSINIT (posix_timer, SI_SUB_P1003_1B, SI_ORDER_FIRST+4, itimer_start, NULL)
int	sys_clock_getcpuclockid2 (struct thread *td, struct clock_getcpuclockid2_args *uap)
int	kern_clock_getcpuclockid2 (struct thread *td, id_t id, int which, clockid_t *clk_id)
int	sys_clock_gettime (struct thread *td, struct clock_gettime_args *uap)
static void	cputick2timespec (uint64_t runtime, struct timespec *ats)
static void	get_thread_cputime (struct thread *targettd, struct timespec *ats)
static void	get_process_cputime (struct proc *targetp, struct timespec *ats)
static int	get_cputime (struct thread *td, clockid_t clock_id, struct timespec *ats)
int	kern_clock_gettime (struct thread *td, clockid_t clock_id, struct timespec *ats)
int	sys_clock_settime (struct thread *td, struct clock_settime_args *uap)
int	kern_clock_settime (struct thread *td, clockid_t clock_id, struct timespec *ats)
int	sys_clock_getres (struct thread *td, struct clock_getres_args *uap)
int	kern_clock_getres (struct thread *td, clockid_t clock_id, struct timespec *ts)
int	kern_nanosleep (struct thread *td, struct timespec *rqt, struct timespec *rmt)
int	sys_nanosleep (struct thread *td, struct nanosleep_args *uap)
int	sys_gettimeofday (struct thread *td, struct gettimeofday_args *uap)
int	sys_settimeofday (struct thread *td, struct settimeofday_args *uap)
int	kern_settimeofday (struct thread *td, struct timeval *tv, struct timezone *tzp)
int	sys_getitimer (struct thread *td, struct getitimer_args *uap)
int	kern_getitimer (struct thread *td, u_int which, struct itimerval *aitv)
int	sys_setitimer (struct thread *td, struct setitimer_args *uap)
int	kern_setitimer (struct thread *td, u_int which, struct itimerval *aitv, struct itimerval *oitv)
void	realitexpire (void *arg)
int	itimerfix (struct timeval *tv)
int	itimerdecr (struct itimerval *itp, int usec)
void	timevaladd (struct timeval *t1, const struct timeval *t2)
void	timevalsub (struct timeval *t1, const struct timeval *t2)
int	ratecheck (struct timeval *lasttime, const struct timeval *mininterval)
int	ppsratecheck (struct timeval *lasttime, int *curpps, int maxpps)
int	sys_ktimer_create (struct thread *td, struct ktimer_create_args *uap)
int	kern_ktimer_create (struct thread *td, clockid_t clock_id, struct sigevent *evp, int *timerid, int preset_id)
int	sys_ktimer_delete (struct thread *td, struct ktimer_delete_args *uap)
int	kern_ktimer_delete (struct thread *td, int timerid)
int	sys_ktimer_settime (struct thread *td, struct ktimer_settime_args *uap)
int	kern_ktimer_settime (struct thread *td, int timer_id, int flags, struct itimerspec *val, struct itimerspec *oval)
int	sys_ktimer_gettime (struct thread *td, struct ktimer_gettime_args *uap)
int	kern_ktimer_gettime (struct thread *td, int timer_id, struct itimerspec *val)
int	sys_ktimer_getoverrun (struct thread *td, struct ktimer_getoverrun_args *uap)
int	kern_ktimer_getoverrun (struct thread *td, int timer_id)
int	itimer_accept (struct proc *p, int timerid, ksiginfo_t *ksi)
static void	itimers_event_hook_exec (void *arg, struct proc *p, struct image_params *imgp __unused)

Variables
static struct kclock	posix_clocks [MAX_CLOCKS]
static uma_zone_t	itimer_zone = NULL
static int	nanowait

Macro Definition Documentation

#define CLOCK_CALL	(		clock,
			call,
			arglist
	)		((*posix_clocks[clock].call) arglist)

Definition at line 105 of file kern_time.c.

Referenced by itimers_event_hook_exit(), kern_ktimer_create(), kern_ktimer_delete(), kern_ktimer_gettime(), and kern_ktimer_settime().

#define CPUCLOCK_BIT   0x80000000

Definition at line 61 of file kern_time.c.

#define CPUCLOCK_ID_MASK   (~(CPUCLOCK_BIT|CPUCLOCK_PROCESS_BIT))

Definition at line 63 of file kern_time.c.

Referenced by get_cputime().

#define CPUCLOCK_PROCESS_BIT   0x40000000

Definition at line 62 of file kern_time.c.

Referenced by get_cputime().

#define MAKE_PROCESS_CPUCLOCK

(

pid

)

(CPUCLOCK_BIT|CPUCLOCK_PROCESS_BIT|(pid))

Definition at line 65 of file kern_time.c.

Referenced by kern_clock_getcpuclockid2().

#define MAKE_THREAD_CPUCLOCK

(

tid

)

(CPUCLOCK_BIT|(tid))

Definition at line 64 of file kern_time.c.

Referenced by kern_clock_getcpuclockid2().

#define MAX_CLOCKS   (CLOCK_MONOTONIC+1)

Definition at line 60 of file kern_time.c.

Referenced by itimers_event_hook_exit(), kern_ktimer_create(), and register_posix_clock().

Function Documentation

__FBSDID

(

"$BSDSUniX$"

)

static void cputick2timespec ( uint64_t  runtime, struct timespec *  ats  )

inlinestatic

Definition at line 242 of file kern_time.c.

References cputick2usec().

Referenced by get_process_cputime(), and get_thread_cputime().

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static int get_cputime ( struct thread *  td, clockid_t  clock_id, struct timespec *  ats  )

static

Definition at line 283 of file kern_time.c.

References CPUCLOCK_ID_MASK, CPUCLOCK_PROCESS_BIT, get_process_cputime(), get_thread_cputime(), pget(), and tdfind().

Referenced by kern_clock_gettime().

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static void get_process_cputime ( struct proc *  targetp, struct timespec *  ats  )

static

Definition at line 270 of file kern_time.c.

References cputick2timespec(), and rufetch().

Referenced by get_cputime(), and kern_clock_gettime().

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static void get_thread_cputime ( struct thread *  targettd, struct timespec *  ats  )

static

Definition at line 250 of file kern_time.c.

References cpu_ticks, cputick2timespec(), critical_enter(), and critical_exit().

Referenced by get_cputime(), and kern_clock_gettime().

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int itimer_accept	(	struct proc *	p,
		int	timerid,
		ksiginfo_t *	ksi
	)

Definition at line 1468 of file kern_time.c.

References itimer_find().

Referenced by kern_sigtimedwait(), and postsig().

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static void itimer_enter ( struct itimer *  it )

static

Definition at line 1023 of file kern_time.c.

Referenced by kern_ktimer_gettime(), kern_ktimer_settime(), and realtimer_expire().

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static struct itimer * itimer_find ( struct proc *  p, int  timerid  )

static

Definition at line 1194 of file kern_time.c.

Referenced by itimer_accept(), kern_ktimer_delete(), kern_ktimer_getoverrun(), kern_ktimer_gettime(), and kern_ktimer_settime().

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static void itimer_fini ( void *  mem, int  size  )

static

Definition at line 1014 of file kern_time.c.

References mtx_destroy().

Referenced by itimer_start().

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void itimer_fire

(

struct itimer *

it

)

Definition at line 1545 of file kern_time.c.

References sigev_findtd(), and tdsendsignal().

Referenced by realtimer_expire().

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static int itimer_init ( void *  mem, int  size, int  flags  )

static

Definition at line 1004 of file kern_time.c.

References mtx_init().

Referenced by itimer_start().

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static void itimer_leave ( struct itimer *  it )

static

Definition at line 1031 of file kern_time.c.

References wakeup().

Referenced by kern_ktimer_gettime(), kern_ktimer_settime(), and realtimer_expire().

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static void itimer_start ( void  )

static

Definition at line 969 of file kern_time.c.

References itimer_fini(), itimer_init(), itimer_zone, itimers_event_hook_exec(), itimers_event_hook_exit(), p31b_setcfg(), realtimer_create(), realtimer_delete(), realtimer_gettime(), realtimer_settime(), and register_posix_clock().

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int itimerdecr	(	struct itimerval *	itp,
		int	usec
	)

Definition at line 838 of file kern_time.c.

Referenced by hardclock_cnt(), and hardclock_cpu().

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int itimerfix

(

struct timeval *

tv

)

Definition at line 817 of file kern_time.c.

References tick.

Referenced by kern_aio_suspend(), kern_aio_waitcomplete(), kern_select(), kern_setitimer(), kqueue_scan(), selsocket(), and sys_poll().

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static void itimers_alloc ( struct proc *  p )

static

Definition at line 1575 of file kern_time.c.

References free(), and malloc().

Referenced by kern_ktimer_create().

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static void itimers_event_hook_exec ( void *  arg, struct proc *  p, struct image_params *  imgp  )

static

Referenced by itimer_start().

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static void itimers_event_hook_exec ( void *  arg, struct proc *  p, struct image_params *imgp  __unused  )

static

Definition at line 1598 of file kern_time.c.

References itimers_event_hook_exit().

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static void itimers_event_hook_exit ( void *  arg, struct proc *  p  )

static

Definition at line 1605 of file kern_time.c.

References CLOCK_CALL, free(), kern_ktimer_delete(), MAX_CLOCKS, panic(), and posix_clocks.

Referenced by itimer_start(), and itimers_event_hook_exec().

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int itimespecfix

(

struct timespec *

ts

)

Definition at line 1485 of file kern_time.c.

References tick.

Referenced by realtimer_settime().

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int kern_clock_getcpuclockid2	(	struct thread *	td,
		id_t	id,
		int	which,
		clockid_t *	clk_id
	)

Definition at line 191 of file kern_time.c.

References MAKE_PROCESS_CPUCLOCK, MAKE_THREAD_CPUCLOCK, and pget().

Referenced by sys_clock_getcpuclockid2().

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int kern_clock_getres	(	struct thread *	td,
		clockid_t	clock_id,
		struct timespec *	ts
	)

Definition at line 430 of file kern_time.c.

References cpu_tickrate(), hz, and tc_getfrequency().

Referenced by sys_clock_getres().

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int kern_clock_gettime	(	struct thread *	td,
		clockid_t	clock_id,
		struct timespec *	ats
	)

Definition at line 311 of file kern_time.c.

References calcru(), get_cputime(), get_process_cputime(), get_thread_cputime(), getnanotime(), getnanouptime(), nanotime(), nanouptime(), time_second, and timevaladd().

Referenced by do_cv_wait(), and sys_clock_gettime().

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int kern_clock_settime	(	struct thread *	td,
		clockid_t	clock_id,
		struct timespec *	ats
	)

Definition at line 391 of file kern_time.c.

References priv_check(), and settime().

Referenced by sys_clock_settime().

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int kern_getitimer	(	struct thread *	td,
		u_int	which,
		struct itimerval *	aitv
	)

Definition at line 664 of file kern_time.c.

References getmicrouptime(), and timevalsub().

Referenced by kern_setitimer(), and sys_getitimer().

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int kern_ktimer_create	(	struct thread *	td,
		clockid_t	clock_id,
		struct sigevent *	evp,
		int *	timerid,
		int	preset_id
	)

Definition at line 1073 of file kern_time.c.

References CLOCK_CALL, itimer_zone, itimers_alloc(), MAX_CLOCKS, and posix_clocks.

Referenced by sys_ktimer_create().

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int kern_ktimer_delete	(	struct thread *	td,
		int	timerid
	)

Definition at line 1213 of file kern_time.c.

References CLOCK_CALL, itimer_find(), itimer_zone, and sigqueue_take().

Referenced by itimers_event_hook_exit(), sys_ktimer_create(), and sys_ktimer_delete().

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int kern_ktimer_getoverrun	(	struct thread *	td,
		int	timer_id
	)

Definition at line 1345 of file kern_time.c.

References itimer_find().

Referenced by sys_ktimer_getoverrun().

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int kern_ktimer_gettime	(	struct thread *	td,
		int	timer_id,
		struct itimerspec *	val
	)

Definition at line 1311 of file kern_time.c.

References CLOCK_CALL, itimer_enter(), itimer_find(), and itimer_leave().

Referenced by sys_ktimer_gettime().

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int kern_ktimer_settime	(	struct thread *	td,
		int	timer_id,
		int	flags,
		struct itimerspec *	val,
		struct itimerspec *	oval
	)

Definition at line 1269 of file kern_time.c.

References CLOCK_CALL, itimer_enter(), itimer_find(), and itimer_leave().

Referenced by sys_ktimer_settime().

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int kern_nanosleep	(	struct thread *	td,
		struct timespec *	rqt,
		struct timespec *	rmt
	)

Definition at line 479 of file kern_time.c.

References getnanouptime(), nanowait, ts, and tvtohz().

Referenced by sys_nanosleep().

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int kern_setitimer	(	struct thread *	td,
		u_int	which,
		struct itimerval *	aitv,
		struct itimerval *	oitv
	)

Definition at line 723 of file kern_time.c.

References getmicrouptime(), itimerfix(), kern_getitimer(), realitexpire(), timevaladd(), timevalsub(), and tvtohz().

Referenced by sys_setitimer().

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int kern_settimeofday	(	struct thread *	td,
		struct timeval *	tv,
		struct timezone *	tzp
	)

Definition at line 604 of file kern_time.c.

References priv_check(), settime(), tz_dsttime, and tz_minuteswest.

Referenced by sys_settimeofday().

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int ppsratecheck	(	struct timeval *	lasttime,
		int *	curpps,
		int	maxpps
	)

Definition at line 948 of file kern_time.c.

References hz, and ticks.

Referenced by falloc_noinstall(), fork1(), ithread_execute_handlers(), malloc(), pipespace_new(), and vfs_mountroot_wait().

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int ratecheck	(	struct timeval *	lasttime,
		const struct timeval *	mininterval
	)

Definition at line 911 of file kern_time.c.

References getmicrouptime(), and timevalsub().

Referenced by sonewconn().

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void realitexpire

(

void *

arg

)

Definition at line 782 of file kern_time.c.

References getmicrouptime(), kern_psignal(), timevaladd(), timevalsub(), tvtohz(), and wakeup().

Referenced by kern_setitimer().

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static void realtimer_clocktime ( clockid_t  id, struct timespec *  ts  )

static

Definition at line 1459 of file kern_time.c.

References getnanotime(), and getnanouptime().

Referenced by realtimer_expire(), realtimer_gettime(), and realtimer_settime().

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static int realtimer_create ( struct itimer *  it )

static

Definition at line 1366 of file kern_time.c.

Referenced by itimer_start().

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static int realtimer_delete ( struct itimer *  it )

static

Definition at line 1373 of file kern_time.c.

Referenced by itimer_start().

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static void realtimer_expire ( void *  arg )

static

Definition at line 1497 of file kern_time.c.

References itimer_enter(), itimer_fire(), itimer_leave(), realtimer_clocktime(), and tvtohz().

Referenced by realtimer_settime().

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static int realtimer_gettime ( struct itimer *  it, struct itimerspec *  ovalue  )

static

Definition at line 1390 of file kern_time.c.

References realtimer_clocktime().

Referenced by itimer_start(), and realtimer_settime().

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static int realtimer_settime ( struct itimer *  it, int  flags, struct itimerspec *  value, struct itimerspec *  ovalue  )

static

Definition at line 1411 of file kern_time.c.

References itimespecfix(), realtimer_clocktime(), realtimer_expire(), realtimer_gettime(), tvtohz(), and value.

Referenced by itimer_start().

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int register_posix_clock	(	int	clockid,
		struct kclock *	clk
	)

Definition at line 993 of file kern_time.c.

References MAX_CLOCKS, posix_clocks, and printf().

Referenced by itimer_start().

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static int settime ( struct thread *  td, struct timeval *  tv  )

static

Definition at line 112 of file kern_time.c.

References Giant, microtime(), printf(), resettodr(), securelevel_gt(), tc_setclock(), and timevalsub().

Referenced by kern_clock_settime(), and kern_settimeofday().

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int sys_clock_getcpuclockid2	(	struct thread *	td,
		struct clock_getcpuclockid2_args *	uap
	)

Definition at line 179 of file kern_time.c.

References clock_getcpuclockid2_args::clock_id, clock_getcpuclockid2_args::id, kern_clock_getcpuclockid2(), and clock_getcpuclockid2_args::which.

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int sys_clock_getres	(	struct thread *	td,
		struct clock_getres_args *	uap
	)

Definition at line 415 of file kern_time.c.

References clock_getres_args::clock_id, kern_clock_getres(), and clock_getres_args::tp.

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int sys_clock_gettime	(	struct thread *	td,
		struct clock_gettime_args *	uap
	)

Definition at line 229 of file kern_time.c.

References clock_gettime_args::clock_id, kern_clock_gettime(), and clock_gettime_args::tp.

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int sys_clock_settime	(	struct thread *	td,
		struct clock_settime_args *	uap
	)

Definition at line 380 of file kern_time.c.

References clock_settime_args::clock_id, kern_clock_settime(), and clock_settime_args::tp.

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int sys_getitimer	(	struct thread *	td,
		struct getitimer_args *	uap
	)

Definition at line 652 of file kern_time.c.

References getitimer_args::itv, kern_getitimer(), and getitimer_args::which.

Referenced by sys_setitimer().

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int sys_gettimeofday	(	struct thread *	td,
		struct gettimeofday_args *	uap
	)

Definition at line 554 of file kern_time.c.

References microtime(), gettimeofday_args::tp, tz_dsttime, tz_minuteswest, and gettimeofday_args::tzp.

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int sys_ktimer_create	(	struct thread *	td,
		struct ktimer_create_args *	uap
	)

Definition at line 1049 of file kern_time.c.

References ktimer_create_args::clock_id, ktimer_create_args::evp, kern_ktimer_create(), kern_ktimer_delete(), and ktimer_create_args::timerid.

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int sys_ktimer_delete	(	struct thread *	td,
		struct ktimer_delete_args *	uap
	)

Definition at line 1187 of file kern_time.c.

References kern_ktimer_delete(), and ktimer_delete_args::timerid.

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int sys_ktimer_getoverrun	(	struct thread *	td,
		struct ktimer_getoverrun_args *	uap
	)

Definition at line 1338 of file kern_time.c.

References kern_ktimer_getoverrun().

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int sys_ktimer_gettime	(	struct thread *	td,
		struct ktimer_gettime_args *	uap
	)

Definition at line 1299 of file kern_time.c.

References kern_ktimer_gettime(), ktimer_gettime_args::timerid, and ktimer_gettime_args::value.

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int sys_ktimer_settime	(	struct thread *	td,
		struct ktimer_settime_args *	uap
	)

Definition at line 1253 of file kern_time.c.

References ktimer_settime_args::flags, kern_ktimer_settime(), ktimer_settime_args::ovalue, ktimer_settime_args::timerid, and ktimer_settime_args::value.

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int sys_nanosleep	(	struct thread *	td,
		struct nanosleep_args *	uap
	)

Definition at line 523 of file kern_time.c.

References kern_nanosleep(), nanosleep_args::rmtp, and nanosleep_args::rqtp.

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int sys_setitimer	(	struct thread *	td,
		struct setitimer_args *	uap
	)

Definition at line 704 of file kern_time.c.

References setitimer_args::itv, kern_setitimer(), setitimer_args::oitv, sys_getitimer(), and setitimer_args::which.

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int sys_settimeofday	(	struct thread *	td,
		struct settimeofday_args *	uap
	)

Definition at line 580 of file kern_time.c.

References kern_settimeofday(), settimeofday_args::tv, and settimeofday_args::tzp.

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SYSINIT	(	posix_timer	,
		SI_SUB_P1003_1B	,
		SI_ORDER_FIRST+	4,
		itimer_start	,
		NULL
	)

void timevaladd	(	struct timeval *	t1,
		const struct timeval *	t2
	)

Definition at line 876 of file kern_time.c.

References timevalfix().

Referenced by acct_process(), fill_kinfo_proc_only(), kern_clock_gettime(), kern_select(), kern_setitimer(), kqueue_scan(), realitexpire(), selsocket(), sys_poll(), and ttydisc_read_raw_read_timer().

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static void timevalfix ( struct timeval *  t1 )

static

Definition at line 894 of file kern_time.c.

Referenced by timevaladd(), and timevalsub().

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void timevalsub	(	struct timeval *	t1,
		const struct timeval *	t2
	)

Definition at line 885 of file kern_time.c.

References timevalfix().

Referenced by acct_process(), kern_getitimer(), kern_select(), kern_setitimer(), kqueue_scan(), ratecheck(), realitexpire(), selsocket(), settime(), sys_poll(), tty_info(), and ttydisc_read_raw_read_timer().

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Variable Documentation

uma_zone_t itimer_zone = NULL

static

Definition at line 69 of file kern_time.c.

Referenced by itimer_start(), kern_ktimer_create(), and kern_ktimer_delete().

int nanowait

static

Definition at line 476 of file kern_time.c.

Referenced by kern_nanosleep().

struct kclock posix_clocks[MAX_CLOCKS]

static

Definition at line 68 of file kern_time.c.

Referenced by itimers_event_hook_exit(), kern_ktimer_create(), and register_posix_clock().