From f0693c8bd5c50380b299e19d19e7640024640b42 Mon Sep 17 00:00:00 2001
From: Steven Rostedt <srostedt@redhat.com>
Date: Thu, 6 Aug 2009 14:59:32 -0400
Subject: tracing/sched: show CPU task wakes up on in trace event

While debugging the scheduler push / pull algorithm, I found
it very annoying that the sched wake up events did not show
the CPU that the task was waking on. In order to analyze the
scheduler, I needed that information.

This patch adds recording of the CPU that a task is waking up
on.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h
index 8949bb7..a581ef2 100644
--- a/include/trace/events/sched.h
+++ b/include/trace/events/sched.h
@@ -94,6 +94,7 @@ TRACE_EVENT(sched_wakeup,
 		__field(	pid_t,	pid			)
 		__field(	int,	prio			)
 		__field(	int,	success			)
+		__field(	int,	cpu			)
 	),
 
 	TP_fast_assign(
@@ -101,11 +102,12 @@ TRACE_EVENT(sched_wakeup,
 		__entry->pid		= p->pid;
 		__entry->prio		= p->prio;
 		__entry->success	= success;
+		__entry->cpu		= task_cpu(p);
 	),
 
-	TP_printk("task %s:%d [%d] success=%d",
+	TP_printk("task %s:%d [%d] success=%d [%03d]",
 		  __entry->comm, __entry->pid, __entry->prio,
-		  __entry->success)
+		  __entry->success, __entry->cpu)
 );
 
 /*
@@ -125,6 +127,7 @@ TRACE_EVENT(sched_wakeup_new,
 		__field(	pid_t,	pid			)
 		__field(	int,	prio			)
 		__field(	int,	success			)
+		__field(	int,	cpu			)
 	),
 
 	TP_fast_assign(
@@ -132,11 +135,12 @@ TRACE_EVENT(sched_wakeup_new,
 		__entry->pid		= p->pid;
 		__entry->prio		= p->prio;
 		__entry->success	= success;
+		__entry->cpu		= task_cpu(p);
 	),
 
-	TP_printk("task %s:%d [%d] success=%d",
+	TP_printk("task %s:%d [%d] success=%d [%03d]",
 		  __entry->comm, __entry->pid, __entry->prio,
-		  __entry->success)
+		  __entry->success, __entry->cpu)
 );
 
 /*
-- 
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