void timer_interrupt(void)
{
/* Increment processes and global tick counters. We can't do this
mid swap because we might have half of the bits for one process
and half of another.. */
if (!inswap && udata.u_ptab->p_status == P_RUNNING) {
if (udata.u_insys)
udata.u_stime++;
else
udata.u_utime++;
}
/* Do once-per-decisecond things - this doesn't work out well on
boxes with 64 ticks/second.. need a better approach */
if (++ticks_this_dsecond == ticks_per_dsecond) {
static ptptr p;
/* Update global time counters */
ticks_this_dsecond = 0;
ticks.full++;
/* Update process alarm clocks and timeouts */
for (p = ptab; p < ptab_end; ++p) {
if (p->p_alarm) {
p->p_alarm--;
if (!p->p_alarm)
ssig(p, SIGALRM);
}
if (p->p_timeout > 1) {
p->p_timeout--;
if (p->p_timeout == 1)
pwake(p);
}
}
updatetod();
load_average();
#ifdef CONFIG_AUDIO
audio_tick();
#endif
}
#ifndef CONFIG_SINGLETASK
/* Check run time of current process. We don't charge time while
swapping as the last thing we want to do is to swap a process in
and decide it took time to swap in so needs to go away again! */
/* FIXME: can we kill off inint ? */
if (!inswap && (++runticks >= udata.u_ptab->p_priority)
&& !udata.u_insys && inint && nready > 1) {
need_resched = 1;
#ifdef DEBUG_PREEMPT
kprintf("[preempt %p %d]", udata.u_ptab,
udata.u_ptab->p_priority);
#endif
}
#endif
}
void timer_interrupt(void)
{
/* Increment processes and global tick counters */
if (udata.u_ptab->p_status == P_RUNNING) {
if (udata.u_insys)
udata.u_stime++;
else
udata.u_utime++;
}
/* Do once-per-decisecond things - this doesn't work out well on
boxes with 64 ticks/second.. need a better approach */
if (++ticks_this_dsecond == ticks_per_dsecond) {
static ptptr p;
/* Update global time counters */
ticks_this_dsecond = 0;
ticks.full++;
/* Update process alarm clocks and timeouts */
for (p = ptab; p < ptab_end; ++p) {
if (p->p_alarm) {
p->p_alarm--;
if (!p->p_alarm)
ssig(p, SIGALRM);
}
if (p->p_timeout > 1) {
p->p_timeout--;
if (p->p_timeout == 1)
pwake(p);
}
}
updatetod();
load_average();
#ifdef CONFIG_AUDIO
audio_tick();
#endif
}
#ifndef CONFIG_SINGLETASK
/* Check run time of current process */
/* Time to switch out? */
if ((++runticks >= udata.u_ptab->p_priority)
&& !udata.u_insys && inint && nready > 1) {
need_resched = 1;
#ifdef DEBUG_PREEMPT
kprintf("[preempt %x %d %x]", udata.u_ptab,
udata.u_ptab->p_priority,
*((uint16_t *)0xEAFE));
#endif
}
#endif
}
