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Commit 9b3377f9 authored by Jack Steiner's avatar Jack Steiner Committed by Tony Luck
Browse files

[IA64] Count resched interrupts 



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

Signed-off-by: default avatarJack Steiner <steiner@sgi.com>
Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
parent 21990267

arch/ia64/kernel/irq_ia64.c

+18 −2
Original line number Diff line number Diff line
@@ -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();