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[IA64] Count resched interrupts 

Count the number of "resched" interrupts that each cpu receives.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Jack Steiner 2006-10-16 16:17:43 -05:00 committed by Tony Luck
parent 2199026773
commit 9b3377f992
1 changed files with 18 additions and 2 deletions
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20
arch/ia64/kernel/irq_ia64.c
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@ -180,7 +180,9 @@ ia64_handle_irq (ia64_vector vector, struct pt_regs *regs)
saved_tpr = ia64_getreg(_IA64_REG_CR_TPR);
ia64_srlz_d();
while (vector != IA64_SPURIOUS_INT_VECTOR) {
if (!IS_RESCHEDULE(vector)) {
if (unlikely(IS_RESCHEDULE(vector)))
kstat_this_cpu.irqs[vector]++;
else {
ia64_setreg(_IA64_REG_CR_TPR, vector);
ia64_srlz_d();
@ -225,7 +227,9 @@ void ia64_process_pending_intr(void)
* Perform normal interrupt style processing
*/
while (vector != IA64_SPURIOUS_INT_VECTOR) {
if (!IS_RESCHEDULE(vector)) {
if (unlikely(IS_RESCHEDULE(vector)))
kstat_this_cpu.irqs[vector]++;
else {
struct pt_regs *old_regs = set_irq_regs(NULL);
ia64_setreg(_IA64_REG_CR_TPR, vector);
@ -258,11 +262,22 @@ void ia64_process_pending_intr(void)
#ifdef CONFIG_SMP
extern irqreturn_t handle_IPI (int irq, void *dev_id);
static irqreturn_t dummy_handler (int irq, void *dev_id)
{
BUG();
}
static struct irqaction ipi_irqaction = {
.handler = handle_IPI,
.flags = IRQF_DISABLED,
.name = "IPI"
};
static struct irqaction resched_irqaction = {
.handler = dummy_handler,
.flags = SA_INTERRUPT,
.name = "resched"
};
#endif
void
@ -287,6 +302,7 @@ init_IRQ (void)
register_percpu_irq(IA64_SPURIOUS_INT_VECTOR, NULL);
#ifdef CONFIG_SMP
register_percpu_irq(IA64_IPI_VECTOR, &ipi_irqaction);
register_percpu_irq(IA64_IPI_RESCHEDULE, &resched_irqaction);
#endif
#ifdef CONFIG_PERFMON
pfm_init_percpu();