| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | |
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| 3 | /* |
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| 4 | * Like the headers that use TRACE_EVENT(), the TRACE_CUSTOM_EVENT() |
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| 5 | * needs a header that allows for multiple inclusions. |
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| 6 | * |
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| 7 | * Test for a unique name (here we have _TRACE_CUSTOM_SCHED_H), |
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| 8 | * also allowing to continue if TRACE_CUSTOM_MULTI_READ is defined. |
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| 9 | */ |
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| 10 | #if !defined(_TRACE_CUSTOM_SCHED_H) || defined(TRACE_CUSTOM_MULTI_READ) |
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| 11 | #define _TRACE_CUSTOM_SCHED_H |
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| 12 | |
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| 13 | /* Include linux/trace_events.h for initial defines of TRACE_CUSTOM_EVENT() */ |
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| 14 | #include <linux/trace_events.h> |
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| 15 | |
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| 16 | /* |
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| 17 | * TRACE_CUSTOM_EVENT() is just like TRACE_EVENT(). The first parameter |
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| 18 | * is the event name of an existing event where the TRACE_EVENT has been included |
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| 19 | * in the C file before including this file. |
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| 20 | */ |
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| 21 | TRACE_CUSTOM_EVENT(sched_switch, |
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| 22 | |
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| 23 | /* |
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| 24 | * The TP_PROTO() and TP_ARGS must match the trace event |
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| 25 | * that the custom event is using. |
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| 26 | */ |
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| 27 | TP_PROTO(bool preempt, |
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| 28 | struct task_struct *prev, |
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| 29 | struct task_struct *next, |
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| 30 | unsigned int prev_state), |
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| 31 | |
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| 32 | TP_ARGS(preempt, prev, next, prev_state), |
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| 33 | |
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| 34 | /* |
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| 35 | * The next fields are where the customization happens. |
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| 36 | * The TP_STRUCT__entry() defines what will be recorded |
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| 37 | * in the ring buffer when the custom event triggers. |
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| 38 | * |
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| 39 | * The rest is just like the TRACE_EVENT() macro except that |
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| 40 | * it uses the custom entry. |
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| 41 | */ |
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| 42 | TP_STRUCT__entry( |
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| 43 | __field( unsigned short, prev_prio ) |
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| 44 | __field( unsigned short, next_prio ) |
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| 45 | __field( pid_t, next_pid ) |
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| 46 | ), |
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| 47 | |
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| 48 | TP_fast_assign( |
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| 49 | __entry->prev_prio = prev->prio; |
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| 50 | __entry->next_pid = next->pid; |
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| 51 | __entry->next_prio = next->prio; |
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| 52 | ), |
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| 53 | |
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| 54 | TP_printk("prev_prio=%d next_pid=%d next_prio=%d" , |
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| 55 | __entry->prev_prio, __entry->next_pid, __entry->next_prio) |
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| 56 | ) |
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| 57 | |
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| 58 | |
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| 59 | TRACE_CUSTOM_EVENT(sched_waking, |
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| 60 | |
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| 61 | TP_PROTO(struct task_struct *p), |
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| 62 | |
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| 63 | TP_ARGS(p), |
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| 64 | |
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| 65 | TP_STRUCT__entry( |
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| 66 | __field( pid_t, pid ) |
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| 67 | __field( unsigned short, prio ) |
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| 68 | ), |
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| 69 | |
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| 70 | TP_fast_assign( |
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| 71 | __entry->pid = p->pid; |
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| 72 | __entry->prio = p->prio; |
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| 73 | ), |
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| 74 | |
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| 75 | TP_printk("pid=%d prio=%d" , __entry->pid, __entry->prio) |
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| 76 | ) |
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| 77 | #endif |
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| 78 | /* |
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| 79 | * Just like the headers that create TRACE_EVENTs, the below must |
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| 80 | * be outside the protection of the above #if block. |
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| 81 | */ |
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| 82 | |
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| 83 | /* |
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| 84 | * It is required that the Makefile includes: |
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| 85 | * CFLAGS_<c_file>.o := -I$(src) |
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| 86 | */ |
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| 87 | #undef TRACE_INCLUDE_PATH |
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| 88 | #undef TRACE_INCLUDE_FILE |
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| 89 | #define TRACE_INCLUDE_PATH . |
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| 90 | |
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| 91 | /* |
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| 92 | * It is requred that the TRACE_INCLUDE_FILE be the same |
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| 93 | * as this file without the ".h". |
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| 94 | */ |
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| 95 | #define TRACE_INCLUDE_FILE trace_custom_sched |
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| 96 | #include <trace/define_custom_trace.h> |
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| 97 | |
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