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authorJack Steiner <steiner@sgi.com>2006-10-16 16:17:43 -0500
committerTony Luck <tony.luck@intel.com>2006-10-17 15:03:08 -0700
commit9b3377f9921766b6193861d0e3194854b1d765fe (patch)
tree3f237114143ceaadb518d0e6967f0c814b785158 /arch/ia64/kernel
parent219902677351665bf0513115592a6dd665cf06e8 (diff)
[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>
Diffstat (limited to 'arch/ia64/kernel')
-rw-r--r--arch/ia64/kernel/irq_ia64.c20
1 files changed, 18 insertions, 2 deletions
diff --git a/arch/ia64/kernel/irq_ia64.c b/arch/ia64/kernel/irq_ia64.c
index 68339dd0c9e..9c6dafa2d0d 100644
--- a/arch/ia64/kernel/irq_ia64.c
+++ b/arch/ia64/kernel/irq_ia64.c
@@ -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();