int xnintr_query_next(int irq, xnintr_iterator_t *iterator, char *name_buf)
{
xnintr_t *intr;
xnticks_t last_switch;
int cpu_no = iterator->cpu + 1;
int err = 0;
spl_t s;
if (cpu_no == xnarch_num_online_cpus())
cpu_no = 0;
iterator->cpu = cpu_no;
xnlock_get_irqsave(&intrlock, s);
if (iterator->list_rev != xnintr_list_rev) {
err = -EAGAIN;
goto unlock_and_exit;
}
if (!iterator->prev) {
if (irq == XNARCH_TIMER_IRQ)
intr = &nkclock;
else
intr = xnintr_shirq_first(irq);
} else
intr = xnintr_shirq_next(iterator->prev);
if (!intr) {
cpu_no = -1;
iterator->prev = NULL;
err = -ENODEV;
goto unlock_and_exit;
}
snprintf(name_buf, XNOBJECT_NAME_LEN, "IRQ%d: %s", irq, intr->name);
iterator->hits = xnstat_counter_get(&intr->stat[cpu_no].hits);
last_switch = xnpod_sched_slot(cpu_no)->last_account_switch;
iterator->exectime_period = intr->stat[cpu_no].account.total;
iterator->account_period =
last_switch - intr->stat[cpu_no].account.start;
intr->stat[cpu_no].sum.total += iterator->exectime_period;
iterator->exectime_total = intr->stat[cpu_no].sum.total;
intr->stat[cpu_no].account.total = 0;
intr->stat[cpu_no].account.start = last_switch;
/* Proceed to next entry in shared IRQ chain when all CPUs
* have been visited for this one. */
if (cpu_no + 1 == xnarch_num_online_cpus())
iterator->prev = intr;
unlock_and_exit:
xnlock_put_irqrestore(&intrlock, s);
return err;
}
static unsigned long __intr_get_hits(RT_INTR *intr)
{
unsigned long sum = 0;
int cpu;
for (cpu = 0; cpu < XNARCH_NR_CPUS; cpu++)
sum += xnstat_counter_get(&intr->intr_base.stat[cpu].hits);
return sum;
}
