diff options
Diffstat (limited to 'include/litmus/trace.h')
-rw-r--r-- | include/litmus/trace.h | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/include/litmus/trace.h b/include/litmus/trace.h new file mode 100644 index 00000000000..8ad4966c602 --- /dev/null +++ b/include/litmus/trace.h | |||
@@ -0,0 +1,145 @@ | |||
1 | #ifndef _SYS_TRACE_H_ | ||
2 | #define _SYS_TRACE_H_ | ||
3 | |||
4 | #ifdef CONFIG_SCHED_OVERHEAD_TRACE | ||
5 | |||
6 | |||
7 | #include <litmus/feather_trace.h> | ||
8 | #include <litmus/feather_buffer.h> | ||
9 | |||
10 | |||
11 | /*********************** TIMESTAMPS ************************/ | ||
12 | |||
13 | enum task_type_marker { | ||
14 | TSK_BE, | ||
15 | TSK_RT, | ||
16 | TSK_UNKNOWN | ||
17 | }; | ||
18 | |||
19 | struct timestamp { | ||
20 | uint64_t timestamp:48; | ||
21 | uint64_t pid:16; | ||
22 | uint32_t seq_no; | ||
23 | uint8_t cpu; | ||
24 | uint8_t event; | ||
25 | uint8_t task_type:2; | ||
26 | uint8_t irq_flag:1; | ||
27 | uint8_t irq_count:5; | ||
28 | }; | ||
29 | |||
30 | /* tracing callbacks */ | ||
31 | feather_callback void save_timestamp(unsigned long event); | ||
32 | feather_callback void save_timestamp_def(unsigned long event, unsigned long type); | ||
33 | feather_callback void save_timestamp_task(unsigned long event, unsigned long t_ptr); | ||
34 | feather_callback void save_timestamp_cpu(unsigned long event, unsigned long cpu); | ||
35 | feather_callback void save_task_latency(unsigned long event, unsigned long when_ptr); | ||
36 | feather_callback void save_timestamp_time(unsigned long event, unsigned long time_ptr); | ||
37 | feather_callback void save_timestamp_irq(unsigned long event, unsigned long irq_count_ptr); | ||
38 | feather_callback void save_timestamp_hide_irq(unsigned long event); | ||
39 | |||
40 | #define TIMESTAMP(id) ft_event0(id, save_timestamp) | ||
41 | |||
42 | #define DTIMESTAMP(id, def) ft_event1(id, save_timestamp_def, (unsigned long) def) | ||
43 | |||
44 | #define TIMESTAMP_CUR(id) DTIMESTAMP(id, is_realtime(current) ? TSK_RT : TSK_BE) | ||
45 | |||
46 | #define TTIMESTAMP(id, task) \ | ||
47 | ft_event1(id, save_timestamp_task, (unsigned long) task) | ||
48 | |||
49 | #define CTIMESTAMP(id, cpu) \ | ||
50 | ft_event1(id, save_timestamp_cpu, (unsigned long) cpu) | ||
51 | |||
52 | #define LTIMESTAMP(id, task) \ | ||
53 | ft_event1(id, save_task_latency, (unsigned long) task) | ||
54 | |||
55 | #define TIMESTAMP_TIME(id, time_ptr) \ | ||
56 | ft_event1(id, save_timestamp_time, (unsigned long) time_ptr) | ||
57 | |||
58 | #define TIMESTAMP_IRQ(id, irq_count_ptr) \ | ||
59 | ft_event1(id, save_timestamp_irq, (unsigned long) irq_count_ptr) | ||
60 | |||
61 | #define TIMESTAMP_IN_IRQ(id) \ | ||
62 | ft_event0(id, save_timestamp_hide_irq) | ||
63 | |||
64 | #else /* !CONFIG_SCHED_OVERHEAD_TRACE */ | ||
65 | |||
66 | #define TIMESTAMP(id) /* no tracing */ | ||
67 | |||
68 | #define DTIMESTAMP(id, def) /* no tracing */ | ||
69 | |||
70 | #define TIMESTAMP_CUR(id) /* no tracing */ | ||
71 | |||
72 | #define TTIMESTAMP(id, task) /* no tracing */ | ||
73 | |||
74 | #define CTIMESTAMP(id, cpu) /* no tracing */ | ||
75 | |||
76 | #define LTIMESTAMP(id, when_ptr) /* no tracing */ | ||
77 | |||
78 | #define TIMESTAMP_TIME(id, time_ptr) /* no tracing */ | ||
79 | |||
80 | #define TIMESTAMP_IRQ(id, irq_count_ptr) /* no tracing */ | ||
81 | |||
82 | #define TIMESTAMP_IN_IRQ(id) /* no tracing */ | ||
83 | |||
84 | #endif | ||
85 | |||
86 | |||
87 | /* Convention for timestamps | ||
88 | * ========================= | ||
89 | * | ||
90 | * In order to process the trace files with a common tool, we use the following | ||
91 | * convention to measure execution times: The end time id of a code segment is | ||
92 | * always the next number after the start time event id. | ||
93 | */ | ||
94 | |||
95 | #define __TS_SYSCALL_IN_START(p) TIMESTAMP_TIME(10, p) | ||
96 | #define __TS_SYSCALL_IN_END(p) TIMESTAMP_IRQ(11, p) | ||
97 | |||
98 | #define TS_SYSCALL_OUT_START TIMESTAMP_CUR(20) | ||
99 | #define TS_SYSCALL_OUT_END TIMESTAMP_CUR(21) | ||
100 | |||
101 | #define TS_LOCK_START TIMESTAMP_CUR(30) | ||
102 | #define TS_LOCK_END TIMESTAMP_CUR(31) | ||
103 | |||
104 | #define TS_LOCK_SUSPEND TIMESTAMP_CUR(38) | ||
105 | #define TS_LOCK_RESUME TIMESTAMP_CUR(39) | ||
106 | |||
107 | #define TS_UNLOCK_START TIMESTAMP_CUR(40) | ||
108 | #define TS_UNLOCK_END TIMESTAMP_CUR(41) | ||
109 | |||
110 | #define TS_SCHED_START DTIMESTAMP(100, TSK_UNKNOWN) /* we only | ||
111 | * care | ||
112 | * about | ||
113 | * next */ | ||
114 | #define TS_SCHED_END(t) TTIMESTAMP(101, t) | ||
115 | #define TS_SCHED2_START(t) TTIMESTAMP(102, t) | ||
116 | #define TS_SCHED2_END(t) TTIMESTAMP(103, t) | ||
117 | |||
118 | #define TS_CXS_START(t) TTIMESTAMP(104, t) | ||
119 | #define TS_CXS_END(t) TTIMESTAMP(105, t) | ||
120 | |||
121 | #define TS_RELEASE_START DTIMESTAMP(106, TSK_RT) | ||
122 | #define TS_RELEASE_END DTIMESTAMP(107, TSK_RT) | ||
123 | |||
124 | #define TS_TICK_START(t) TTIMESTAMP(110, t) | ||
125 | #define TS_TICK_END(t) TTIMESTAMP(111, t) | ||
126 | |||
127 | |||
128 | #define TS_PLUGIN_SCHED_START /* TIMESTAMP(120) */ /* currently unused */ | ||
129 | #define TS_PLUGIN_SCHED_END /* TIMESTAMP(121) */ | ||
130 | |||
131 | #define TS_PLUGIN_TICK_START /* TIMESTAMP(130) */ | ||
132 | #define TS_PLUGIN_TICK_END /* TIMESTAMP(131) */ | ||
133 | |||
134 | #define TS_ENTER_NP_START TIMESTAMP(140) | ||
135 | #define TS_ENTER_NP_END TIMESTAMP(141) | ||
136 | |||
137 | #define TS_EXIT_NP_START TIMESTAMP(150) | ||
138 | #define TS_EXIT_NP_END TIMESTAMP(151) | ||
139 | |||
140 | #define TS_SEND_RESCHED_START(c) CTIMESTAMP(190, c) | ||
141 | #define TS_SEND_RESCHED_END TIMESTAMP_IN_IRQ(191) | ||
142 | |||
143 | #define TS_RELEASE_LATENCY(when) LTIMESTAMP(208, &(when)) | ||
144 | |||
145 | #endif /* !_SYS_TRACE_H_ */ | ||