kern_tc.c File Reference

This source file contains the definition of _Timecounter, _Timecounter_Time_second, and _Timecounter_Time_uptime and the implementation of _Timecounter_Set_NTP_update_second(), _Timecounter_Binuptime(), _Timecounter_Nanouptime(), _Timecounter_Microuptime(), _Timecounter_Bintime(), _Timecounter_Nanotime(), _Timecounter_Microtime(), _Timecounter_Getbinuptime(), _Timecounter_Getnanouptime(), _Timecounter_Getmicrouptime(), _Timecounter_Getbintime(), _Timecounter_Getnanotime(), _Timecounter_Getmicrotime(), _Timecounter_Getboottime(), _Timecounter_Getboottimebin(), and _Timecounter_Install(). More...

#include <sys/cdefs.h>
#include "opt_ntp.h"
#include "opt_ffclock.h"
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/limits.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/sbuf.h>
#include <sys/sleepqueue.h>
#include <sys/sysctl.h>
#include <sys/syslog.h>
#include <sys/systm.h>
#include <sys/timeffc.h>
#include <sys/timepps.h>
#include <sys/timetc.h>
#include <sys/timex.h>
#include <sys/vdso.h>
#include "opt_ddb.h"

Data Structures
struct	timehands

Macros
#define	LARGE_STEP   200
#define	GETTHBINTIME(dst, member)
#define	GETTHMEMBER(dst, member)

Functions
	__FBSDID ("$FreeBSD$")
	SYSCTL_PROC (_kern, KERN_BOOTTIME, boottime, CTLTYPE_STRUCT|CTLFLAG_RD|CTLFLAG_MPSAFE, NULL, 0, sysctl_kern_boottime, "S,timeval", "Estimated system boottime")
	SYSCTL_NODE (_kern, OID_AUTO, timecounter, CTLFLAG_RW|CTLFLAG_MPSAFE, 0, "")
	SYSCTL_INT (_kern_timecounter, OID_AUTO, stepwarnings, CTLFLAG_RWTUN, &timestepwarnings, 0, "Log time steps")
	SYSCTL_INT (_kern_timecounter, OID_AUTO, timehands_count, CTLFLAG_RDTUN|CTLFLAG_NOFETCH, &timehands_count, 0, "Count of timehands in rotation")
	SYSCTL_PROC (_kern_timecounter, OID_AUTO, alloweddeviation, CTLTYPE_INT|CTLFLAG_RWTUN|CTLFLAG_MPSAFE, 0, 0, sysctl_kern_timecounter_adjprecision, "I", "Allowed time interval deviation in percents")
void	dtrace_getnanotime (struct timespec *tsp)
void	dtrace_getnanouptime (struct timespec *tsp)
void	binuptime (struct bintime *bt)
void	nanouptime (struct timespec *tsp)
void	microuptime (struct timeval *tvp)
void	bintime (struct bintime *bt)
void	nanotime (struct timespec *tsp)
void	microtime (struct timeval *tvp)
void	getbinuptime (struct bintime *bt)
void	getnanouptime (struct timespec *tsp)
void	getmicrouptime (struct timeval *tvp)
void	getbintime (struct bintime *bt)
void	getnanotime (struct timespec *tsp)
void	getmicrotime (struct timeval *tvp)
void	getboottime (struct timeval *boottime)
void	getboottimebin (struct bintime *boottimebin)
void	sysclock_getsnapshot (struct sysclock_snap *clock_snap, int fast)
int	sysclock_snap2bintime (struct sysclock_snap *cs, struct bintime *bt, int whichclock, uint32_t flags)
void	tc_init (struct timecounter *tc)
uint64_t	tc_getfrequency (void)
	MTX_SYSINIT (tc_setclock_init, &tc_setclock_mtx, "tcsetc", MTX_SPIN)
void	tc_setclock (struct timespec *ts)
	SYSCTL_PROC (_kern_timecounter, OID_AUTO, hardware, CTLTYPE_STRING|CTLFLAG_RWTUN|CTLFLAG_NOFETCH|CTLFLAG_MPSAFE, 0, 0, sysctl_kern_timecounter_hardware, "A", "Timecounter hardware selected")
	SYSCTL_PROC (_kern_timecounter, OID_AUTO, choice, CTLTYPE_STRING|CTLFLAG_RD|CTLFLAG_MPSAFE, 0, 0, sysctl_kern_timecounter_choice, "A", "Timecounter hardware detected")
int	pps_ioctl (u_long cmd, caddr_t data, struct pps_state *pps)
void	pps_init (struct pps_state *pps)
void	pps_init_abi (struct pps_state *pps)
void	pps_capture (struct pps_state *pps)
void	pps_event (struct pps_state *pps, int event)
	SYSCTL_INT (_kern_timecounter, OID_AUTO, tick, CTLFLAG_RD, &tc_tick, 0, "Approximate number of hardclock ticks in a millisecond")
void	tc_ticktock (int cnt)
	SYSINIT (timehands, SI_SUB_TUNABLES, SI_ORDER_ANY, inittimehands, NULL)
	SYSINIT (timecounter, SI_SUB_CLOCKS, SI_ORDER_SECOND, inittimecounter, NULL)
	DPCPU_DEFINE_STATIC (uint64_t, tc_cpu_ticks_base)
	DPCPU_DEFINE_STATIC (unsigned, tc_cpu_ticks_last)
void	cpu_tick_calibration (void)
void	set_cputicker (cpu_tick_f *func, uint64_t freq, bool isvariable)
uint64_t	cpu_tickrate (void)
uint64_t	cputick2usec (uint64_t tick)
	SYSCTL_PROC (_kern_timecounter, OID_AUTO, fast_gettime, CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_MPSAFE, NULL, 0, sysctl_fast_gettime, "I", "Enable fast time of day")
uint32_t	tc_fill_vdso_timehands (struct vdso_timehands *vdso_th)

Variables
struct timecounter *	timecounter = &dummy_timecounter
int	tc_min_ticktock_freq = 1
volatile time_t	time_second = 1
volatile time_t	time_uptime = 1
struct bintime	bt_timethreshold
struct bintime	bt_tickthreshold
sbintime_t	sbt_timethreshold
sbintime_t	sbt_tickthreshold
struct bintime	tc_tick_bt
sbintime_t	tc_tick_sbt
int	tc_precexp
int	tc_timepercentage = TC_DEFAULTPERC
volatile int	rtc_generation = 1
int	time_status
long	time_esterror
cpu_tick_f *	cpu_ticks = tc_cpu_ticks

Detailed Description

This source file contains the definition of _Timecounter, _Timecounter_Time_second, and _Timecounter_Time_uptime and the implementation of _Timecounter_Set_NTP_update_second(), _Timecounter_Binuptime(), _Timecounter_Nanouptime(), _Timecounter_Microuptime(), _Timecounter_Bintime(), _Timecounter_Nanotime(), _Timecounter_Microtime(), _Timecounter_Getbinuptime(), _Timecounter_Getnanouptime(), _Timecounter_Getmicrouptime(), _Timecounter_Getbintime(), _Timecounter_Getnanotime(), _Timecounter_Getmicrotime(), _Timecounter_Getboottime(), _Timecounter_Getboottimebin(), and _Timecounter_Install().

Macro Definition Documentation

GETTHBINTIME

#define GETTHBINTIME	(		dst,
			member
	)

Value:

do {                                    \
    _Static_assert(_Generic(((struct timehands *)NULL)->member, \
        struct bintime: 1, default: 0) == 1,            \
        "struct timehands member is not of struct bintime type");   \
    bintime_off(dst, __offsetof(struct timehands, member));     \
} while (0)

GETTHMEMBER

#define GETTHMEMBER	(		dst,
			member
	)

Value:

do {                                    \
    _Static_assert(_Generic(*dst,                   \
        __typeof(((struct timehands *)NULL)->member): 1,        \
        default: 0) == 1,                       \
        "*dst and struct timehands member have different types");   \
    getthmember(dst, sizeof(*dst), __offsetof(struct timehands, \
        member));                           \
} while (0)