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#if !defined(_TRACE_IRQ_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_IRQ_H
#include <linux/tracepoint.h>
#include <linux/interrupt.h>
#undef TRACE_SYSTEM
#define TRACE_SYSTEM irq
/**
* 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 handler=%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 return=%s",
__entry->irq, __entry->ret ? "handled" : "unhandled")
);
/**
* softirq_entry - called immediately before the softirq handler
* @h: pointer to struct softirq_action
* @vec: pointer to first struct softirq_action in softirq_vec array
*
* The @h parameter, contains a pointer to the struct softirq_action
* which has a pointer to the action handler that is called. By subtracting
* the @vec pointer from the @h pointer, we can determine the softirq
* number. Also, when used in combination with the softirq_exit tracepoint
* we can determine the softirq latency.
*/
TRACE_EVENT(softirq_entry,
TP_PROTO(struct softirq_action *h, struct softirq_action *vec),
TP_ARGS(h, vec),
TP_STRUCT__entry(
__field( int, vec )
__string( name, softirq_to_name[h-vec] )
),
TP_fast_assign(
__entry->vec = (int)(h - vec);
__assign_str(name, softirq_to_name[h-vec]);
),
TP_printk("softirq=%d action=%s", __entry->vec, __get_str(name))
);
/**
* softirq_exit - called immediately after the softirq handler returns
* @h: pointer to struct softirq_action
* @vec: pointer to first struct softirq_action in softirq_vec array
*
* The @h parameter contains a pointer to the struct softirq_action
* that has handled the softirq. By subtracting the @vec pointer from
* the @h pointer, we can determine the softirq number. Also, when used in
* combination with the softirq_entry tracepoint we can determine the softirq
* latency.
*/
TRACE_EVENT(softirq_exit,
TP_PROTO(struct softirq_action *h, struct softirq_action *vec),
TP_ARGS(h, vec),
TP_STRUCT__entry(
__field( int, vec )
__string( name, softirq_to_name[h-vec] )
),
TP_fast_assign(
__entry->vec = (int)(h - vec);
__assign_str(name, softirq_to_name[h-vec]);
),
TP_printk("softirq=%d action=%s", __entry->vec, __get_str(name))
);
#endif /* _TRACE_IRQ_H */
/* This part must be outside protection */
#include <trace/define_trace.h>
|
