From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Wed, 5 Aug 2015 17:04:01 -0300
Subject: Initial import

---
 include/trace/events/irq.h | 165 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 165 insertions(+)
 create mode 100644 include/trace/events/irq.h

(limited to 'include/trace/events/irq.h')

diff --git a/include/trace/events/irq.h b/include/trace/events/irq.h
new file mode 100644
index 000000000..ff8f6c091
--- /dev/null
+++ b/include/trace/events/irq.h
@@ -0,0 +1,165 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM irq
+
+#if !defined(_TRACE_IRQ_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_IRQ_H
+
+#include <linux/tracepoint.h>
+
+struct irqaction;
+struct softirq_action;
+
+#define SOFTIRQ_NAME_LIST				\
+			 softirq_name(HI)		\
+			 softirq_name(TIMER)		\
+			 softirq_name(NET_TX)		\
+			 softirq_name(NET_RX)		\
+			 softirq_name(BLOCK)		\
+			 softirq_name(BLOCK_IOPOLL)	\
+			 softirq_name(TASKLET)		\
+			 softirq_name(SCHED)		\
+			 softirq_name(HRTIMER)		\
+			 softirq_name_end(RCU)
+
+#undef softirq_name
+#undef softirq_name_end
+
+#define softirq_name(sirq) TRACE_DEFINE_ENUM(sirq##_SOFTIRQ);
+#define softirq_name_end(sirq)  TRACE_DEFINE_ENUM(sirq##_SOFTIRQ);
+
+SOFTIRQ_NAME_LIST
+
+#undef softirq_name
+#undef softirq_name_end
+
+#define softirq_name(sirq) { sirq##_SOFTIRQ, #sirq },
+#define softirq_name_end(sirq) { sirq##_SOFTIRQ, #sirq }
+
+#define show_softirq_name(val)				\
+	__print_symbolic(val, SOFTIRQ_NAME_LIST)
+
+/**
+ * irq_handler_entry - called immediately before the irq action handler
+ * @irq: irq number
+ * @action: pointer to struct irqaction
+ *
+ * The struct irqaction pointed to by @action contains various
+ * information about the handler, including the device name,
+ * @action->name, and the device id, @action->dev_id. When used in
+ * conjunction with the irq_handler_exit tracepoint, we can figure
+ * out irq handler latencies.
+ */
+TRACE_EVENT(irq_handler_entry,
+
+	TP_PROTO(int irq, struct irqaction *action),
+
+	TP_ARGS(irq, action),
+
+	TP_STRUCT__entry(
+		__field(	int,	irq		)
+		__string(	name,	action->name	)
+	),
+
+	TP_fast_assign(
+		__entry->irq = irq;
+		__assign_str(name, action->name);
+	),
+
+	TP_printk("irq=%d name=%s", __entry->irq, __get_str(name))
+);
+
+/**
+ * irq_handler_exit - called immediately after the irq action handler returns
+ * @irq: irq number
+ * @action: pointer to struct irqaction
+ * @ret: return value
+ *
+ * If the @ret value is set to IRQ_HANDLED, then we know that the corresponding
+ * @action->handler scuccessully handled this irq. Otherwise, the irq might be
+ * a shared irq line, or the irq was not handled successfully. Can be used in
+ * conjunction with the irq_handler_entry to understand irq handler latencies.
+ */
+TRACE_EVENT(irq_handler_exit,
+
+	TP_PROTO(int irq, struct irqaction *action, int ret),
+
+	TP_ARGS(irq, action, ret),
+
+	TP_STRUCT__entry(
+		__field(	int,	irq	)
+		__field(	int,	ret	)
+	),
+
+	TP_fast_assign(
+		__entry->irq	= irq;
+		__entry->ret	= ret;
+	),
+
+	TP_printk("irq=%d ret=%s",
+		  __entry->irq, __entry->ret ? "handled" : "unhandled")
+);
+
+DECLARE_EVENT_CLASS(softirq,
+
+	TP_PROTO(unsigned int vec_nr),
+
+	TP_ARGS(vec_nr),
+
+	TP_STRUCT__entry(
+		__field(	unsigned int,	vec	)
+	),
+
+	TP_fast_assign(
+		__entry->vec = vec_nr;
+	),
+
+	TP_printk("vec=%u [action=%s]", __entry->vec,
+		  show_softirq_name(__entry->vec))
+);
+
+/**
+ * softirq_entry - called immediately before the softirq handler
+ * @vec_nr:  softirq vector number
+ *
+ * When used in combination with the softirq_exit tracepoint
+ * we can determine the softirq handler routine.
+ */
+DEFINE_EVENT(softirq, softirq_entry,
+
+	TP_PROTO(unsigned int vec_nr),
+
+	TP_ARGS(vec_nr)
+);
+
+/**
+ * softirq_exit - called immediately after the softirq handler returns
+ * @vec_nr:  softirq vector number
+ *
+ * When used in combination with the softirq_entry tracepoint
+ * we can determine the softirq handler routine.
+ */
+DEFINE_EVENT(softirq, softirq_exit,
+
+	TP_PROTO(unsigned int vec_nr),
+
+	TP_ARGS(vec_nr)
+);
+
+/**
+ * softirq_raise - called immediately when a softirq is raised
+ * @vec_nr:  softirq vector number
+ *
+ * When used in combination with the softirq_entry tracepoint
+ * we can determine the softirq raise to run latency.
+ */
+DEFINE_EVENT(softirq, softirq_raise,
+
+	TP_PROTO(unsigned int vec_nr),
+
+	TP_ARGS(vec_nr)
+);
+
+#endif /*  _TRACE_IRQ_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
-- 
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