x86/irq: Show statistics information for posted-interrupts

Feng Wu · KAGA-KOKO · commit 501b32653ebf · 2015-05-19T15:51:17.000+02:00
Show the statistics information for notification event and wakeup event for posted-interrupt in /proc/interrupts. [ tglx: Named the short identifiers PIN and PIW to match the long identifiers ] Signed-off-by: Feng Wu <feng.wu@intel.com> Cc: jiang.liu@linux.intel.com Link: http://lkml.kernel.org/r/1432026437-16560-5-git-send-email-feng.wu@intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
@@ -141,6 +141,18 @@ int arch_show_interrupts(struct seq_file *p, int prec)
 	seq_printf(p, "%*s: %10u\n", prec, "ERR", atomic_read(&irq_err_count));
 #if defined(CONFIG_X86_IO_APIC)
 	seq_printf(p, "%*s: %10u\n", prec, "MIS", atomic_read(&irq_mis_count));
+#endif
+#ifdef CONFIG_HAVE_KVM
+	seq_printf(p, "%*s: ", prec, "PIN");
+	for_each_online_cpu(j)
+		seq_printf(p, "%10u ", irq_stats(j)->kvm_posted_intr_ipis);
+	seq_puts(p, "  Posted-interrupt notification event\n");
+
+	seq_printf(p, "%*s: ", prec, "PIW");
+	for_each_online_cpu(j)
+		seq_printf(p, "%10u ",
+			   irq_stats(j)->kvm_posted_intr_wakeup_ipis);
+	seq_puts(p, "  Posted-interrupt wakeup event\n");
 #endif
 	return 0;
 }
