diff options
| author | Jack Steiner <steiner@sgi.com> | 2006-10-16 16:17:43 -0500 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2006-10-17 15:03:08 -0700 |
| commit | 9b3377f9921766b6193861d0e3194854b1d765fe (patch) | |
| tree | 3f237114143ceaadb518d0e6967f0c814b785158 /arch/ia64/kernel/irq_ia64.c | |
| parent | 219902677351665bf0513115592a6dd665cf06e8 (diff) | |
| download | blackbird-op-linux-9b3377f9921766b6193861d0e3194854b1d765fe.tar.gz blackbird-op-linux-9b3377f9921766b6193861d0e3194854b1d765fe.zip | |
[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/irq_ia64.c')
| -rw-r--r-- | arch/ia64/kernel/irq_ia64.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/arch/ia64/kernel/irq_ia64.c b/arch/ia64/kernel/irq_ia64.c index 68339dd0c9e2..9c6dafa2d0df 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(); |
