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166 lines
3.8 KiB
166 lines
3.8 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#undef TRACE_SYSTEM |
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#define TRACE_SYSTEM irq |
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#if !defined(_TRACE_IRQ_H) || defined(TRACE_HEADER_MULTI_READ) |
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#define _TRACE_IRQ_H |
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#include <linux/tracepoint.h> |
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struct irqaction; |
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struct softirq_action; |
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#define SOFTIRQ_NAME_LIST \ |
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softirq_name(HI) \ |
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softirq_name(TIMER) \ |
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softirq_name(NET_TX) \ |
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softirq_name(NET_RX) \ |
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softirq_name(BLOCK) \ |
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softirq_name(IRQ_POLL) \ |
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softirq_name(TASKLET) \ |
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softirq_name(SCHED) \ |
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softirq_name(HRTIMER) \ |
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softirq_name_end(RCU) |
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#undef softirq_name |
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#undef softirq_name_end |
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#define softirq_name(sirq) TRACE_DEFINE_ENUM(sirq##_SOFTIRQ); |
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#define softirq_name_end(sirq) TRACE_DEFINE_ENUM(sirq##_SOFTIRQ); |
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SOFTIRQ_NAME_LIST |
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#undef softirq_name |
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#undef softirq_name_end |
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#define softirq_name(sirq) { sirq##_SOFTIRQ, #sirq }, |
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#define softirq_name_end(sirq) { sirq##_SOFTIRQ, #sirq } |
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#define show_softirq_name(val) \ |
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__print_symbolic(val, SOFTIRQ_NAME_LIST) |
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/** |
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* irq_handler_entry - called immediately before the irq action handler |
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* @irq: irq number |
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* @action: pointer to struct irqaction |
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* |
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* The struct irqaction pointed to by @action contains various |
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* information about the handler, including the device name, |
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* @action->name, and the device id, @action->dev_id. When used in |
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* conjunction with the irq_handler_exit tracepoint, we can figure |
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* out irq handler latencies. |
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*/ |
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TRACE_EVENT(irq_handler_entry, |
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TP_PROTO(int irq, struct irqaction *action), |
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TP_ARGS(irq, action), |
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TP_STRUCT__entry( |
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__field( int, irq ) |
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__string( name, action->name ) |
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), |
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TP_fast_assign( |
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__entry->irq = irq; |
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__assign_str(name, action->name); |
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), |
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TP_printk("irq=%d name=%s", __entry->irq, __get_str(name)) |
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); |
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/** |
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* irq_handler_exit - called immediately after the irq action handler returns |
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* @irq: irq number |
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* @action: pointer to struct irqaction |
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* @ret: return value |
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* |
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* If the @ret value is set to IRQ_HANDLED, then we know that the corresponding |
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* @action->handler successfully handled this irq. Otherwise, the irq might be |
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* a shared irq line, or the irq was not handled successfully. Can be used in |
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* conjunction with the irq_handler_entry to understand irq handler latencies. |
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*/ |
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TRACE_EVENT(irq_handler_exit, |
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TP_PROTO(int irq, struct irqaction *action, int ret), |
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TP_ARGS(irq, action, ret), |
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TP_STRUCT__entry( |
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__field( int, irq ) |
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__field( int, ret ) |
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), |
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TP_fast_assign( |
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__entry->irq = irq; |
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__entry->ret = ret; |
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), |
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TP_printk("irq=%d ret=%s", |
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__entry->irq, __entry->ret ? "handled" : "unhandled") |
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); |
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DECLARE_EVENT_CLASS(softirq, |
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TP_PROTO(unsigned int vec_nr), |
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TP_ARGS(vec_nr), |
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TP_STRUCT__entry( |
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__field( unsigned int, vec ) |
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), |
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TP_fast_assign( |
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__entry->vec = vec_nr; |
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), |
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TP_printk("vec=%u [action=%s]", __entry->vec, |
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show_softirq_name(__entry->vec)) |
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); |
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/** |
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* softirq_entry - called immediately before the softirq handler |
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* @vec_nr: softirq vector number |
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* |
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* When used in combination with the softirq_exit tracepoint |
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* we can determine the softirq handler routine. |
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*/ |
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DEFINE_EVENT(softirq, softirq_entry, |
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TP_PROTO(unsigned int vec_nr), |
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TP_ARGS(vec_nr) |
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); |
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/** |
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* softirq_exit - called immediately after the softirq handler returns |
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* @vec_nr: softirq vector number |
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* |
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* When used in combination with the softirq_entry tracepoint |
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* we can determine the softirq handler routine. |
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*/ |
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DEFINE_EVENT(softirq, softirq_exit, |
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TP_PROTO(unsigned int vec_nr), |
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TP_ARGS(vec_nr) |
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); |
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/** |
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* softirq_raise - called immediately when a softirq is raised |
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* @vec_nr: softirq vector number |
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* |
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* When used in combination with the softirq_entry tracepoint |
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* we can determine the softirq raise to run latency. |
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*/ |
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DEFINE_EVENT(softirq, softirq_raise, |
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TP_PROTO(unsigned int vec_nr), |
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TP_ARGS(vec_nr) |
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); |
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#endif /* _TRACE_IRQ_H */ |
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/* This part must be outside protection */ |
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#include <trace/define_trace.h>
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