[PATCH 11/11] powerpc/time: account broadcast timer event interrupts separately
From: Nicholas Piggin <npiggin@gmail.com>
Date: 2018-05-04 17:20:22
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
These are not local timer interrupts but IPIs. It's good to be able to see how timer offloading is behaving, so split these out into their own category. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> --- arch/powerpc/include/asm/hardirq.h | 1 + arch/powerpc/kernel/irq.c | 6 ++++++ arch/powerpc/kernel/time.c | 5 +---- 3 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/arch/powerpc/include/asm/hardirq.h b/arch/powerpc/include/asm/hardirq.h
index 5986d473722b..20b01897ea5d 100644
--- a/arch/powerpc/include/asm/hardirq.h
+++ b/arch/powerpc/include/asm/hardirq.h@@ -8,6 +8,7 @@ typedef struct { unsigned int __softirq_pending; unsigned int timer_irqs_event; + unsigned int broadcast_irqs_event; unsigned int timer_irqs_others; unsigned int pmu_irqs; unsigned int mce_exceptions;
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 6569b5ffff93..627db34bb79d 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c@@ -518,6 +518,11 @@ int arch_show_interrupts(struct seq_file *p, int prec) seq_printf(p, "%10u ", per_cpu(irq_stat, j).timer_irqs_event); seq_printf(p, " Local timer interrupts for timer event device\n"); + seq_printf(p, "%*s: ", prec, "BCT"); + for_each_online_cpu(j) + seq_printf(p, "%10u ", per_cpu(irq_stat, j).broadcast_irqs_event); + seq_printf(p, " Broadcast timer interrupts for timer event device\n"); + seq_printf(p, "%*s: ", prec, "LOC"); for_each_online_cpu(j) seq_printf(p, "%10u ", per_cpu(irq_stat, j).timer_irqs_others);
@@ -577,6 +582,7 @@ u64 arch_irq_stat_cpu(unsigned int cpu) { u64 sum = per_cpu(irq_stat, cpu).timer_irqs_event; + sum += per_cpu(irq_stat, cpu).broadcast_irqs_event; sum += per_cpu(irq_stat, cpu).pmu_irqs; sum += per_cpu(irq_stat, cpu).mce_exceptions; sum += per_cpu(irq_stat, cpu).spurious_irqs;
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index 23921f7b6e67..ed6b2abdde15 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c@@ -647,13 +647,10 @@ EXPORT_SYMBOL(timer_interrupt); void timer_broadcast_interrupt(void) { u64 *next_tb = this_cpu_ptr(&decrementers_next_tb); - struct pt_regs *regs = get_irq_regs(); - trace_timer_interrupt_entry(regs); *next_tb = ~(u64)0; tick_receive_broadcast(); - __this_cpu_inc(irq_stat.timer_irqs_event); - trace_timer_interrupt_exit(regs); + __this_cpu_inc(irq_stat.broadcast_irqs_event); } #endif
--
2.17.0