5dd4de587f
With BLOCK_IOPOLL_SOFTIRQ added, softirq_to_name[] and show_softirq_name() needs to be updated. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> LKML-Reference: <4AB20398.8070209@cn.fujitsu.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
146 lines
3.8 KiB
C
146 lines
3.8 KiB
C
#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>
|
|
#include <linux/interrupt.h>
|
|
|
|
#define softirq_name(sirq) { sirq##_SOFTIRQ, #sirq }
|
|
#define show_softirq_name(val) \
|
|
__print_symbolic(val, \
|
|
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(RCU))
|
|
|
|
/**
|
|
* 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 )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->vec = (int)(h - vec);
|
|
),
|
|
|
|
TP_printk("softirq=%d action=%s", __entry->vec,
|
|
show_softirq_name(__entry->vec))
|
|
);
|
|
|
|
/**
|
|
* 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 )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->vec = (int)(h - vec);
|
|
),
|
|
|
|
TP_printk("softirq=%d action=%s", __entry->vec,
|
|
show_softirq_name(__entry->vec))
|
|
);
|
|
|
|
#endif /* _TRACE_IRQ_H */
|
|
|
|
/* This part must be outside protection */
|
|
#include <trace/define_trace.h>
|