tracing: add schedule events to event trace

This patch changes the trace/sched.h to use the DECLARE_TRACE_FMT
such that they are automatically registered with the event tracer.

And it also adds the tracing sched headers to kernel/trace/events.c

Signed-off-by: Steven Rostedt <srostedt@redhat.com>

include/trace/sched.h

@@ -4,53 +4,6 @@
 #include <linux/sched.h>
 #include <linux/tracepoint.h>
 
-DECLARE_TRACE(sched_kthread_stop,
+#include <trace/sched_event_types.h>
-	TPPROTO(struct task_struct *t),
-		TPARGS(t));
-
-DECLARE_TRACE(sched_kthread_stop_ret,
-	TPPROTO(int ret),
-		TPARGS(ret));
-
-DECLARE_TRACE(sched_wait_task,
-	TPPROTO(struct rq *rq, struct task_struct *p),
-		TPARGS(rq, p));
-
-DECLARE_TRACE(sched_wakeup,
-	TPPROTO(struct rq *rq, struct task_struct *p, int success),
-		TPARGS(rq, p, success));
-
-DECLARE_TRACE(sched_wakeup_new,
-	TPPROTO(struct rq *rq, struct task_struct *p, int success),
-		TPARGS(rq, p, success));
-
-DECLARE_TRACE(sched_switch,
-	TPPROTO(struct rq *rq, struct task_struct *prev,
-		struct task_struct *next),
-		TPARGS(rq, prev, next));
-
-DECLARE_TRACE(sched_migrate_task,
-	TPPROTO(struct task_struct *p, int orig_cpu, int dest_cpu),
-		TPARGS(p, orig_cpu, dest_cpu));
-
-DECLARE_TRACE(sched_process_free,
-	TPPROTO(struct task_struct *p),
-		TPARGS(p));
-
-DECLARE_TRACE(sched_process_exit,
-	TPPROTO(struct task_struct *p),
-		TPARGS(p));
-
-DECLARE_TRACE(sched_process_wait,
-	TPPROTO(struct pid *pid),
-		TPARGS(pid));
-
-DECLARE_TRACE(sched_process_fork,
-	TPPROTO(struct task_struct *parent, struct task_struct *child),
-		TPARGS(parent, child));
-
-DECLARE_TRACE(sched_signal_send,
-	TPPROTO(int sig, struct task_struct *p),
-		TPARGS(sig, p));
 
 #endif

include/trace/sched_event_types.h

@@ -0,0 +1,72 @@
+
+/* use <trace/sched.h> instead */
+#ifndef DEFINE_TRACE_FMT
+# error Do not include this file directly.
+# error Unless you know what you are doing.
+#endif
+
+DEFINE_TRACE_FMT(sched_kthread_stop,
+	TPPROTO(struct task_struct *t),
+	TPARGS(t),
+	TPFMT("task %s:%d", t->comm, t->pid));
+
+DEFINE_TRACE_FMT(sched_kthread_stop_ret,
+	TPPROTO(int ret),
+	TPARGS(ret),
+	TPFMT("ret=%d", ret));
+
+DEFINE_TRACE_FMT(sched_wait_task,
+	TPPROTO(struct rq *rq, struct task_struct *p),
+	TPARGS(rq, p),
+	TPFMT("task %s:%d", p->comm, p->pid));
+
+DEFINE_TRACE_FMT(sched_wakeup,
+	TPPROTO(struct rq *rq, struct task_struct *p, int success),
+	TPARGS(rq, p, success),
+	TPFMT("task %s:%d %s",
+	      p->comm, p->pid, success?"succeeded":"failed"));
+
+DEFINE_TRACE_FMT(sched_wakeup_new,
+	TPPROTO(struct rq *rq, struct task_struct *p, int success),
+	TPARGS(rq, p, success),
+	TPFMT("task %s:%d",
+	      p->comm, p->pid, success?"succeeded":"failed"));
+
+DEFINE_TRACE_FMT(sched_switch,
+	TPPROTO(struct rq *rq, struct task_struct *prev,
+		struct task_struct *next),
+	TPARGS(rq, prev, next),
+	TPFMT("task %s:%d ==> %s:%d",
+	      prev->comm, prev->pid, next->comm, next->pid));
+
+DEFINE_TRACE_FMT(sched_migrate_task,
+	TPPROTO(struct task_struct *p, int orig_cpu, int dest_cpu),
+	TPARGS(p, orig_cpu, dest_cpu),
+	TPFMT("task %s:%d from: %d  to: %d",
+	      p->comm, p->pid, orig_cpu, dest_cpu));
+
+DEFINE_TRACE_FMT(sched_process_free,
+	TPPROTO(struct task_struct *p),
+	TPARGS(p),
+	TPFMT("task %s:%d", p->comm, p->pid));
+
+DEFINE_TRACE_FMT(sched_process_exit,
+	TPPROTO(struct task_struct *p),
+	TPARGS(p),
+	TPFMT("task %s:%d", p->comm, p->pid));
+
+DEFINE_TRACE_FMT(sched_process_wait,
+	TPPROTO(struct pid *pid),
+	TPARGS(pid),
+	TPFMT("pid %d", pid));
+
+DEFINE_TRACE_FMT(sched_process_fork,
+	TPPROTO(struct task_struct *parent, struct task_struct *child),
+	TPARGS(parent, child),
+	TPFMT("parent %s:%d  child %s:%d",
+	      parent->comm, parent->pid, child->comm, child->pid));
+
+DEFINE_TRACE_FMT(sched_signal_send,
+	TPPROTO(int sig, struct task_struct *p),
+	TPARGS(sig, p),
+	TPFMT("sig: %d   task %s:%d", sig, p->comm, p->pid));

kernel/trace/Makefile

@@ -39,5 +39,6 @@ obj-$(CONFIG_KMEMTRACE) += kmemtrace.o
 obj-$(CONFIG_WORKQUEUE_TRACER) += trace_workqueue.o
 obj-$(CONFIG_BLK_DEV_IO_TRACE)	+= blktrace.o
 obj-$(CONFIG_EVENT_TRACER) += trace_events.o
+obj-$(CONFIG_EVENT_TRACER) += events.o
 
 libftrace-y := ftrace.o

kernel/trace/events.c

@@ -0,0 +1,13 @@
+/*
+ * This is the place to register all trace points as events.
+ * Include the trace/<type>.h at the top.
+ * Include the trace/<type>_event_types.h at the bottom.
+ */
+
+/* trace/<type>.h here */
+#include <trace/sched.h>
+
+#include "trace_events.h"
+
+/* trace/<type>_event_types.h here */
+#include <trace/sched_event_types.h>