/*
* The real-time timer, interrupting hz times per second.
*/
void
hardclock(struct clockframe *frame)
{
struct proc *p;
struct cpu_info *ci = curcpu();
p = curproc;
if (p && ((p->p_flag & (P_SYSTEM | P_WEXIT)) == 0)) {
struct process *pr = p->p_p;
/*
* Run current process's virtual and profile time, as needed.
*/
if (CLKF_USERMODE(frame) &&
timerisset(&pr->ps_timer[ITIMER_VIRTUAL].it_value) &&
itimerdecr(&pr->ps_timer[ITIMER_VIRTUAL], tick) == 0) {
atomic_setbits_int(&p->p_flag, P_ALRMPEND);
need_proftick(p);
}
if (timerisset(&pr->ps_timer[ITIMER_PROF].it_value) &&
itimerdecr(&pr->ps_timer[ITIMER_PROF], tick) == 0) {
atomic_setbits_int(&p->p_flag, P_PROFPEND);
need_proftick(p);
}
}
/*
* If no separate statistics clock is available, run it from here.
*/
if (stathz == 0)
statclock(frame);
if (--ci->ci_schedstate.spc_rrticks <= 0)
roundrobin(ci);
/*
* If we are not the primary CPU, we're not allowed to do
* any more work.
*/
if (CPU_IS_PRIMARY(ci) == 0)
return;
tc_ticktock();
ticks++;
/*
* Update real-time timeout queue.
* Process callouts at a very low cpu priority, so we don't keep the
* relatively high clock interrupt priority any longer than necessary.
*/
if (timeout_hardclock_update())
softintr_schedule(softclock_si);
}
/*
* The real-time timer, interrupting hz times per second.
*/
void
hardclock(struct clockframe *frame)
{
struct lwp *l;
struct cpu_info *ci;
ci = curcpu();
l = ci->ci_data.cpu_onproc;
timer_tick(l, CLKF_USERMODE(frame));
/*
* If no separate statistics clock is available, run it from here.
*/
if (stathz == 0)
statclock(frame);
/*
* If no separate schedclock is provided, call it here
* at about 16 Hz.
*/
if (schedhz == 0) {
if ((int)(--ci->ci_schedstate.spc_schedticks) <= 0) {
schedclock(l);
ci->ci_schedstate.spc_schedticks = hardscheddiv;
}
}
if ((--ci->ci_schedstate.spc_ticks) <= 0)
sched_tick(ci);
if (CPU_IS_PRIMARY(ci)) {
hardclock_ticks++;
tc_ticktock();
}
/*
* Update real-time timeout queue.
*/
callout_hardclock();
#ifdef KDTRACE_HOOKS
cyclic_clock_func_t func = cyclic_clock_func[cpu_index(ci)];
if (func) {
(*func)((struct clockframe *)frame);
}
#endif
}
/*
* The real-time timer, interrupting hz times per second.
*/
void
uinet_hardclock(void)
{
atomic_add_int((volatile int *)&ticks, 1);
/* hardclock_cpu(usermode);
*
* There is no need for the process accounting done in
* hardclock_cpu(). We only need the callout_tick() call, which is
* reproduced below.
*/
callout_tick();
tc_ticktock(1);
/* cpu_tick_calibration();
*
* There is no need for cpu_tick_calibration(), as we are operating
* as a fixed-rate ticker.
*/
/*
* If no separate statistics clock is available, run it from here.
*
* XXX: this only works for UP
*/
/* if (stathz == 0) {
* profclock(usermode, pc);
* statclock(usermode);
* }
*
* No need for profclock or statclock support.
*/
#ifndef UINET /* No DEVICE_POLLING or SW_WATCHDOG support under UINET */
#ifdef DEVICE_POLLING
hardclock_device_poll(); /* this is very short and quick */
#endif /* DEVICE_POLLING */
#ifdef SW_WATCHDOG
if (watchdog_enabled > 0 && --watchdog_ticks <= 0)
watchdog_fire();
#endif /* SW_WATCHDOG */
#endif /* UINET */
}