From: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
To: Masami Hiramatsu <mhiramat@redhat.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Takashi Nishiie <t-nishiie@np.css.fujitsu.com>,
'Alexey Dobriyan' <adobriyan@gmail.com>,
'Peter Zijlstra' <peterz@infradead.org>,
'Steven Rostedt' <rostedt@goodmis.org>,
"'Frank Ch. Eigler'" <fche@redhat.com>,
'Ingo Molnar' <mingo@elte.hu>,
'LKML' <linux-kernel@vger.kernel.org>,
'systemtap-ml' <systemtap@sources.redhat.com>,
'Hideo AOKI' <haoki@redhat.com>
Subject: [RFC PATCH] Tracepoint sched probes
Date: Thu, 26 Jun 2008 16:20:00 -0000 [thread overview]
Message-ID: <20080625235507.GB14249@Krystal> (raw)
In-Reply-To: <48612879.5090809@redhat.com>
** note : early RFC. This patch applies on a unreleased LTTng for
2.6.26-rc8 patchset.
Scheduler tracepoint probes
Only a single probe is implement as a POC.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
CC: 'Peter Zijlstra' <peterz@infradead.org>
CC: "Frank Ch. Eigler" <fche@redhat.com>
CC: 'Ingo Molnar' <mingo@elte.hu>
CC: 'Hideo AOKI' <haoki@redhat.com>
CC: Takashi Nishiie <t-nishiie@np.css.fujitsu.com>
CC: 'Steven Rostedt' <rostedt@goodmis.org>
---
init/Kconfig | 7 +++++++
kernel/Makefile | 1 +
kernel/sched-trace.c | 28 ++++++++++++++++++++++++++++
kernel/sched-trace.h | 11 +++++++++++
kernel/sched.c | 5 +++--
5 files changed, 50 insertions(+), 2 deletions(-)
Index: linux-2.6.26-rc7-lttng/kernel/sched-trace.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.26-rc7-lttng/kernel/sched-trace.c 2008-06-25 18:36:11.000000000 -0400
@@ -0,0 +1,28 @@
+#include <linux/module.h>
+#include "sched-trace.h"
+
+static void probe_sched_switch(void *private_data, struct task_struct *prev,
+ struct task_struct *next)
+{
+ trace_mark(kernel_sched_schedule,
+ "prev_pid %d next_pid %d prev_state %ld",
+ prev->pid, next->pid, prev->state);
+}
+
+int __init sched_trace_init(void)
+{
+ return register_trace_sched_switch(probe_sched_switch, NULL);
+}
+
+module_init(sched_trace_init);
+
+void __exit sched_trace_exit(void)
+{
+ unregister_trace_sched_switch(probe_sched_switch, NULL);
+}
+
+module_exit(sched_trace_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Mathieu Desnoyers");
+MODULE_DESCRIPTION("Scheduler Tracpoint Probes");
Index: linux-2.6.26-rc7-lttng/kernel/sched-trace.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.26-rc7-lttng/kernel/sched-trace.h 2008-06-25 18:36:11.000000000 -0400
@@ -0,0 +1,11 @@
+#ifndef _KERNEL_SCHED_TRACE_H
+#define _KERNEL_SCHED_TRACE_H
+
+#include <linux/sched.h>
+#include <linux/tracepoint.h>
+
+DEFINE_TRACE(sched_switch,
+ TPPROTO(struct task_struct *prev, struct task_struct *next),
+ TPARGS(prev, next));
+
+#endif
Index: linux-2.6.26-rc7-lttng/kernel/sched.c
===================================================================
--- linux-2.6.26-rc7-lttng.orig/kernel/sched.c 2008-06-25 18:35:42.000000000 -0400
+++ linux-2.6.26-rc7-lttng/kernel/sched.c 2008-06-25 18:36:11.000000000 -0400
@@ -75,6 +75,8 @@
#include <asm/tlb.h>
#include <asm/irq_regs.h>
+#include "sched-trace.h"
+
/*
* Convert user-nice values [ -20 ... 0 ... 19 ]
* to static priority [ MAX_RT_PRIO..MAX_PRIO-1 ],
@@ -2458,8 +2460,7 @@
struct mm_struct *mm, *oldmm;
prepare_task_switch(rq, prev, next);
- trace_mark(internal_kernel_sched_schedule,
- "prev %p next %p", prev, next);
+ trace_sched_switch(prev, next);
mm = next->mm;
oldmm = prev->active_mm;
/*
Index: linux-2.6.26-rc7-lttng/kernel/Makefile
===================================================================
--- linux-2.6.26-rc7-lttng.orig/kernel/Makefile 2008-06-25 18:35:42.000000000 -0400
+++ linux-2.6.26-rc7-lttng/kernel/Makefile 2008-06-25 18:36:11.000000000 -0400
@@ -70,6 +70,7 @@
obj-$(USE_IMMEDIATE) += immediate.o
obj-$(CONFIG_MARKERS) += marker.o
obj-$(CONFIG_TRACEPOINTS) += tracepoint.o
+obj-$(CONFIG_SCHED_TRACE) += sched-trace.o
obj-$(CONFIG_LATENCYTOP) += latencytop.o
ifneq ($(CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER),y)
Index: linux-2.6.26-rc7-lttng/init/Kconfig
===================================================================
--- linux-2.6.26-rc7-lttng.orig/init/Kconfig 2008-06-25 18:36:07.000000000 -0400
+++ linux-2.6.26-rc7-lttng/init/Kconfig 2008-06-25 18:36:26.000000000 -0400
@@ -789,6 +789,13 @@
Place an empty function call at each tracepoint site. Can be
dynamically changed for a probe function.
+config SCHED_TRACE
+ depends on TRACEPOINTS
+ tristate "Scheduler tracing"
+ default y
+ help
+ Build the scheduler tracing probes.
+
config MARKERS
bool "Activate markers"
help
--
Mathieu Desnoyers
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
next prev parent reply other threads:[~2008-06-25 23:55 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-20 19:36 [RFC][Patch 2/2] markers: example of irq regular kernel markers Masami Hiramatsu
2008-06-20 22:16 ` Mathieu Desnoyers
2008-06-20 23:23 ` Masami Hiramatsu
2008-06-21 15:08 ` KOSAKI Motohiro
2008-06-21 18:04 ` Steven Rostedt
2008-06-21 19:41 ` Frank Ch. Eigler
2008-06-22 4:03 ` Steven Rostedt
2008-06-22 4:32 ` Peter Zijlstra
2008-06-22 17:12 ` Frank Ch. Eigler
2008-06-23 2:20 ` Masami Hiramatsu
2008-06-23 7:08 ` KOSAKI Motohiro
2008-06-22 18:03 ` Frank Ch. Eigler
2008-06-22 18:27 ` Masami Hiramatsu
2008-06-21 10:14 ` Peter Zijlstra
2008-06-23 3:06 ` [RFC] Tracepoint proposal Mathieu Desnoyers
2008-06-23 6:34 ` Alexey Dobriyan
2008-06-23 6:51 ` Mathieu Desnoyers
2008-06-24 7:15 ` Alexey Dobriyan
2008-06-24 11:39 ` Masami Hiramatsu
2008-06-24 13:23 ` Takashi Nishiie
2008-06-24 16:23 ` Frank Ch. Eigler
2008-06-24 19:43 ` Masami Hiramatsu
2008-06-25 1:08 ` KOSAKI Motohiro
2008-06-25 1:36 ` Masami Hiramatsu
2008-06-25 1:49 ` Mathieu Desnoyers
2008-06-26 16:20 ` Mathieu Desnoyers [this message]
2008-06-26 17:01 ` [RFC PATCH] Kernel Tracepoints Mathieu Desnoyers
2008-06-27 13:21 ` Masami Hiramatsu
2008-06-27 15:00 ` Mathieu Desnoyers
2008-06-29 18:46 ` Masami Hiramatsu
2008-06-30 18:21 ` Mathieu Desnoyers
2008-06-27 15:07 ` Mathieu Desnoyers
2008-06-30 20:11 ` Masami Hiramatsu
2008-06-27 15:48 ` Mathieu Desnoyers
2008-06-28 0:05 ` Masami Hiramatsu
2008-06-30 17:14 ` Mathieu Desnoyers
2008-06-30 20:17 ` Masami Hiramatsu
2008-07-03 15:13 ` Mathieu Desnoyers
2008-07-03 18:53 ` Masami Hiramatsu
2008-06-27 16:11 ` [RFC PATCH] Kernel Tracepoints (update) Mathieu Desnoyers
2008-07-03 15:29 ` Masami Hiramatsu
2008-07-03 15:47 ` Mathieu Desnoyers
2008-07-03 18:19 ` Mathieu Desnoyers
2008-07-03 18:48 ` Masami Hiramatsu
2008-06-24 11:06 ` [RFC] Tracepoint proposal Masami Hiramatsu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20080625235507.GB14249@Krystal \
--to=mathieu.desnoyers@polymtl.ca \
--cc=adobriyan@gmail.com \
--cc=fche@redhat.com \
--cc=haoki@redhat.com \
--cc=kosaki.motohiro@jp.fujitsu.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mhiramat@redhat.com \
--cc=mingo@elte.hu \
--cc=peterz@infradead.org \
--cc=rostedt@goodmis.org \
--cc=systemtap@sources.redhat.com \
--cc=t-nishiie@np.css.fujitsu.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).