linux-kernel - [tip:x86/apic] x86/irq: Show statistics information for posted-interrupts

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Message-ID: <tip-501b32653ebf49114cccb9afbf9150cf18fd8700@git.kernel.org>
Date:	Tue, 19 May 2015 06:55:10 -0700
From:	tip-bot for Feng Wu <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, mingo@...nel.org, feng.wu@...el.com,
	tglx@...utronix.de, hpa@...or.com
Subject: [tip:x86/apic] x86/irq:
  Show statistics information for posted-interrupts

Commit-ID:  501b32653ebf49114cccb9afbf9150cf18fd8700
Gitweb:     http://git.kernel.org/tip/501b32653ebf49114cccb9afbf9150cf18fd8700
Author:     Feng Wu <feng.wu@...el.com>
AuthorDate: Tue, 19 May 2015 17:07:17 +0800
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Tue, 19 May 2015 15:51:17 +0200

x86/irq: Show statistics information for posted-interrupts

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@...el.com>
Cc: jiang.liu@...ux.intel.com
Link: http://lkml.kernel.org/r/1432026437-16560-5-git-send-email-feng.wu@intel.com
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 arch/x86/kernel/irq.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index 90b2f705..7e10c8b 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -142,6 +142,18 @@ int arch_show_interrupts(struct seq_file *p, int prec)
 #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;
 }
 
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