Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756546AbZD0Fyu (ORCPT ); Mon, 27 Apr 2009 01:54:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754948AbZD0Fyj (ORCPT ); Mon, 27 Apr 2009 01:54:39 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:57530 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1753753AbZD0Fyi (ORCPT ); Mon, 27 Apr 2009 01:54:38 -0400 Message-ID: <49F548D0.9030500@cn.fujitsu.com> Date: Mon, 27 Apr 2009 13:55:28 +0800 From: Xiao Guangrong User-Agent: Thunderbird 2.0.0.6 (Windows/20070728) MIME-Version: 1.0 To: mingo@elte.hu, mathieu.desnoyers@polymtl.ca, fweisbec@gmail.com, rostedt@goodmis.org, zhaolei@cn.fujitsu.com, laijs@cn.fujitsu.com, Li Zefan , tzanussi@gmail.com CC: linux-kernel@vger.kernel.org Subject: [PATCH v2] ftrace: add a tracepoint for __raise_softirq_irqoff() Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2354 Lines: 76 From: Mathieu Desnoyers This patch is modified from Mathieu Desnoyers' patch. The original patch can be found here: http://marc.info/?l=linux-kernel&m=123791201816245&w=2 This tracepoint can trace the time stamp when softirq action is raised. Change log for v1 -> v2: 1: Use TRACE_EVENT instead of DEFINE_TRACE 2: Move the tracepoint from raise_softirq_irqoff() to __raise_softirq_irqoff() Signed-off-by: Mathieu Desnoyers Signed-off-by: Xiao Guangrong --- include/linux/interrupt.h | 9 ++++++++- include/trace/events/irq.h | 18 ++++++++++++++++++ 2 files changed, 26 insertions(+), 1 deletions(-) diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h index 912c52c..86bae89 100644 --- a/include/linux/interrupt.h +++ b/include/linux/interrupt.h @@ -361,7 +361,14 @@ asmlinkage void do_softirq(void); asmlinkage void __do_softirq(void); extern void open_softirq(int nr, void (*action)(struct softirq_action *)); extern void softirq_init(void); -#define __raise_softirq_irqoff(nr) do { or_softirq_pending(1UL << (nr)); } while (0) + +#include +static inline void __raise_softirq_irqoff(unsigned int nr) +{ + trace_irq_softirq_raise(nr); + or_softirq_pending(1UL << nr); +} + extern void raise_softirq_irqoff(unsigned int nr); extern void raise_softirq(unsigned int nr); extern void wakeup_softirqd(void); diff --git a/include/trace/events/irq.h b/include/trace/events/irq.h index 7686864..2628e08 100644 --- a/include/trace/events/irq.h +++ b/include/trace/events/irq.h @@ -90,6 +90,24 @@ TRACE_EVENT(softirq_exit, TP_printk("softirq=%d action=%s", __entry->vec, __get_str(name)) ); +TRACE_EVENT(irq_softirq_raise, + + TP_PROTO(unsigned int nr), + + TP_ARGS(nr), + + TP_STRUCT__entry( + __field( unsigned int, nr ) + ), + + TP_fast_assign( + __entry->nr = nr; + ), + + TP_printk("softirq=%d action=%s is raised", + __entry->nr, softirq_to_name[__entry->nr]) +); + #endif /* _TRACE_IRQ_H */ /* This part must be outside protection */ -- 1.6.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/