tracing, perf: Convert the power tracer into an event tracer

This patch converts the existing power tracer into an event tracer,
so that power events (C states and frequency changes) can be
tracked via "perf".

This also removes the perl script that was used to demo the tracer;
its functionality is being replaced entirely with timechart.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <20090912130542.6d314860@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 81 insertions, 0 deletions

diff --git a/include/trace/events/power.h b/include/trace/events/power.h
new file mode 100644
index 000000000000..ea6d579261ad
--- /dev/null
+++ b/include/trace/events/power.h
@@ -0,0 +1,81 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM power
+
+#if !defined(_TRACE_POWER_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_POWER_H
+
+#include <linux/ktime.h>
+#include <linux/tracepoint.h>
+
+#ifndef _TRACE_POWER_ENUM_
+#define _TRACE_POWER_ENUM_
+enum {
+        POWER_NONE = 0,
+        POWER_CSTATE = 1,
+        POWER_PSTATE = 2,
+};
+#endif
+
+
+
+TRACE_EVENT(power_start,
+
+        TP_PROTO(unsigned int type, unsigned int state),
+
+        TP_ARGS(type, state),
+
+        TP_STRUCT__entry(
+                __field(        u64,            type            )
+                __field(        u64,            state           )
+        ),
+
+        TP_fast_assign(
+                __entry->type = type;
+                __entry->state = state;
+        ),
+
+        TP_printk("type=%lu state=%lu", (unsigned long)__entry->type, (unsigned long)__entry->state)
+);
+
+TRACE_EVENT(power_end,
+
+        TP_PROTO(int dummy),
+
+        TP_ARGS(dummy),
+
+        TP_STRUCT__entry(
+                __field(        u64,            dummy           )
+        ),
+
+        TP_fast_assign(
+                __entry->dummy = 0xffff;
+        ),
+
+        TP_printk("dummy=%lu", (unsigned long)__entry->dummy)
+
+);
+
+
+TRACE_EVENT(power_frequency,
+
+        TP_PROTO(unsigned int type, unsigned int state),
+
+        TP_ARGS(type, state),
+
+        TP_STRUCT__entry(
+                __field(        u64,            type            )
+                __field(        u64,            state           )
+        ),
+
+        TP_fast_assign(
+                __entry->type = type;
+                __entry->state = state;
+        ),
+
+        TP_printk("type=%lu state=%lu", (unsigned long)__entry->type, (unsigned long) __entry->state)
+);
+
+#endif /* _TRACE_POWER_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>