diff options
Diffstat (limited to 'xen/arch/i386/irq.c')
| -rw-r--r-- | xen/arch/i386/irq.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/xen/arch/i386/irq.c b/xen/arch/i386/irq.c index e58fb8f2ad..312cfe7970 100644 --- a/xen/arch/i386/irq.c +++ b/xen/arch/i386/irq.c @@ -36,6 +36,7 @@ #include <asm/pgalloc.h> #include <xeno/delay.h> +#include <xeno/perfc.h> /* * Linux has a controller-independent x86 interrupt architecture. @@ -469,6 +470,11 @@ asmlinkage unsigned int do_IRQ(struct pt_regs regs) struct irqaction * action; unsigned int status; + u32 cc_start, cc_end; + + perfc_incra(irqs, cpu); + rdtscl(cc_start); + spin_lock(&desc->lock); desc->handler->ack(irq); /* @@ -530,6 +536,9 @@ asmlinkage unsigned int do_IRQ(struct pt_regs regs) if (softirq_pending(cpu)) do_softirq(); + rdtscl(cc_end); + perfc_adda(irq_time, cpu, cc_end - cc_start); + return 1; } |