instrumentation/events/lttng-module/sched.h

   1 #undef TRACE_SYSTEM
   2 #define TRACE_SYSTEM sched
   3
   4 #if !defined(_TRACE_SCHED_H) || defined(TRACE_HEADER_MULTI_READ)
   5 #define _TRACE_SCHED_H
   6
   7 #include <linux/sched.h>
   8 #include <linux/tracepoint.h>
   9
  10 #ifndef _TRACE_SCHED_DEF_
  11 #define _TRACE_SCHED_DEF_
  12
  13 static inline long __trace_sched_switch_state(struct task_struct *p)
  14 {
  15         long state = p->state;
  16
  17 #ifdef CONFIG_PREEMPT
  18         /*
  19          * For all intents and purposes a preempted task is a running task.
  20          */
  21         if (task_thread_info(p)->preempt_count & PREEMPT_ACTIVE)
  22                 state = TASK_RUNNING;
  23 #endif
  24
  25         return state;
  26 }
  27
  28 #endif /* _TRACE_SCHED_DEF_ */
  29
  30 /*
  31  * Tracepoint for calling kthread_stop, performed to end a kthread:
  32  */
  33 TRACE_EVENT(sched_kthread_stop,
  34
  35         TP_PROTO(struct task_struct *t),
  36
  37         TP_ARGS(t),
  38
  39         TP_STRUCT__entry(
  40                 __array_text(   char,   comm,   TASK_COMM_LEN   )
  41                 __field(        pid_t,  pid                     )
  42         ),
  43
  44         TP_fast_assign(
  45                 tp_memcpy(comm, t->comm, TASK_COMM_LEN)
  46                 tp_assign(pid, t->pid)
  47         ),
  48
  49         TP_printk("comm=%s pid=%d", __entry->comm, __entry->pid)
  50 )
  51
  52 /*
  53  * Tracepoint for the return value of the kthread stopping:
  54  */
  55 TRACE_EVENT(sched_kthread_stop_ret,
  56
  57         TP_PROTO(int ret),
  58
  59         TP_ARGS(ret),
  60
  61         TP_STRUCT__entry(
  62                 __field(        int,    ret     )
  63         ),
  64
  65         TP_fast_assign(
  66                 tp_assign(ret, ret)
  67         ),
  68
  69         TP_printk("ret=%d", __entry->ret)
  70 )
  71
  72 /*
  73  * Tracepoint for waking up a task:
  74  */
  75 DECLARE_EVENT_CLASS(sched_wakeup_template,
  76
  77         TP_PROTO(struct task_struct *p, int success),
  78
  79         TP_ARGS(p, success),
  80
  81         TP_STRUCT__entry(
  82                 __array_text(   char,   comm,   TASK_COMM_LEN   )
  83                 __field(        pid_t,  pid                     )
  84                 __field(        int,    prio                    )
  85                 __field(        int,    success                 )
  86                 __field(        int,    target_cpu              )
  87         ),
  88
  89         TP_fast_assign(
  90                 tp_memcpy(comm, p->comm, TASK_COMM_LEN)
  91                 tp_assign(pid, p->pid)
  92                 tp_assign(prio, p->prio)
  93                 tp_assign(success, success)
  94                 tp_assign(target_cpu, task_cpu(p))
  95         ),
  96
  97         TP_printk("comm=%s pid=%d prio=%d success=%d target_cpu=%03d",
  98                   __entry->comm, __entry->pid, __entry->prio,
  99                   __entry->success, __entry->target_cpu)
 100 )
 101
 102 DEFINE_EVENT(sched_wakeup_template, sched_wakeup,
 103              TP_PROTO(struct task_struct *p, int success),
 104              TP_ARGS(p, success))
 105
 106 /*
 107  * Tracepoint for waking up a new task:
 108  */
 109 DEFINE_EVENT(sched_wakeup_template, sched_wakeup_new,
 110              TP_PROTO(struct task_struct *p, int success),
 111              TP_ARGS(p, success))
 112
 113 /*
 114  * Tracepoint for task switches, performed by the scheduler:
 115  */
 116 TRACE_EVENT(sched_switch,
 117
 118         TP_PROTO(struct task_struct *prev,
 119                  struct task_struct *next),
 120
 121         TP_ARGS(prev, next),
 122
 123         TP_STRUCT__entry(
 124                 __array_text(   char,   prev_comm,      TASK_COMM_LEN   )
 125                 __field(        pid_t,  prev_pid                        )
 126                 __field(        int,    prev_prio                       )
 127                 __field(        long,   prev_state                      )
 128                 __array_text(   char,   next_comm,      TASK_COMM_LEN   )
 129                 __field(        pid_t,  next_pid                        )
 130                 __field(        int,    next_prio                       )
 131         ),
 132
 133         TP_fast_assign(
 134                 tp_memcpy(next_comm, next->comm, TASK_COMM_LEN)
 135                 tp_assign(prev_pid, prev->pid)
 136                 tp_assign(prev_prio, prev->prio)
 137                 tp_assign(prev_state, __trace_sched_switch_state(prev))
 138                 tp_memcpy(prev_comm, prev->comm, TASK_COMM_LEN)
 139                 tp_assign(next_pid, next->pid)
 140                 tp_assign(next_prio, next->prio)
 141         ),
 142
 143         TP_printk("prev_comm=%s prev_pid=%d prev_prio=%d prev_state=%s ==> next_comm=%s next_pid=%d next_prio=%d",
 144                 __entry->prev_comm, __entry->prev_pid, __entry->prev_prio,
 145                 __entry->prev_state ?
 146                   __print_flags(__entry->prev_state, "|",
 147                                 { 1, "S"} , { 2, "D" }, { 4, "T" }, { 8, "t" },
 148                                 { 16, "Z" }, { 32, "X" }, { 64, "x" },
 149                                 { 128, "W" }) : "R",
 150                 __entry->next_comm, __entry->next_pid, __entry->next_prio)
 151 )
 152
 153 /*
 154  * Tracepoint for a task being migrated:
 155  */
 156 TRACE_EVENT(sched_migrate_task,
 157
 158         TP_PROTO(struct task_struct *p, int dest_cpu),
 159
 160         TP_ARGS(p, dest_cpu),
 161
 162         TP_STRUCT__entry(
 163                 __array_text(   char,   comm,   TASK_COMM_LEN   )
 164                 __field(        pid_t,  pid                     )
 165                 __field(        int,    prio                    )
 166                 __field(        int,    orig_cpu                )
 167                 __field(        int,    dest_cpu                )
 168         ),
 169
 170         TP_fast_assign(
 171                 tp_memcpy(comm, p->comm, TASK_COMM_LEN)
 172                 tp_assign(pid, p->pid)
 173                 tp_assign(prio, p->prio)
 174                 tp_assign(orig_cpu, task_cpu(p))
 175                 tp_assign(dest_cpu, dest_cpu)
 176         ),
 177
 178         TP_printk("comm=%s pid=%d prio=%d orig_cpu=%d dest_cpu=%d",
 179                   __entry->comm, __entry->pid, __entry->prio,
 180                   __entry->orig_cpu, __entry->dest_cpu)
 181 )
 182
 183 DECLARE_EVENT_CLASS(sched_process_template,
 184
 185         TP_PROTO(struct task_struct *p),
 186
 187         TP_ARGS(p),
 188
 189         TP_STRUCT__entry(
 190                 __array_text(   char,   comm,   TASK_COMM_LEN   )
 191                 __field(        pid_t,  pid                     )
 192                 __field(        int,    prio                    )
 193         ),
 194
 195         TP_fast_assign(
 196                 tp_memcpy(comm, p->comm, TASK_COMM_LEN)
 197                 tp_assign(pid, p->pid)
 198                 tp_assign(prio, p->prio)
 199         ),
 200
 201         TP_printk("comm=%s pid=%d prio=%d",
 202                   __entry->comm, __entry->pid, __entry->prio)
 203 )
 204
 205 /*
 206  * Tracepoint for freeing a task:
 207  */
 208 DEFINE_EVENT(sched_process_template, sched_process_free,
 209              TP_PROTO(struct task_struct *p),
 210              TP_ARGS(p))
 211
 212
 213 /*
 214  * Tracepoint for a task exiting:
 215  */
 216 DEFINE_EVENT(sched_process_template, sched_process_exit,
 217              TP_PROTO(struct task_struct *p),
 218              TP_ARGS(p))
 219
 220 /*
 221  * Tracepoint for waiting on task to unschedule:
 222  */
 223 DEFINE_EVENT(sched_process_template, sched_wait_task,
 224         TP_PROTO(struct task_struct *p),
 225         TP_ARGS(p))
 226
 227 /*
 228  * Tracepoint for a waiting task:
 229  */
 230 TRACE_EVENT(sched_process_wait,
 231
 232         TP_PROTO(struct pid *pid),
 233
 234         TP_ARGS(pid),
 235
 236         TP_STRUCT__entry(
 237                 __array_text(   char,   comm,   TASK_COMM_LEN   )
 238                 __field(        pid_t,  pid                     )
 239                 __field(        int,    prio                    )
 240         ),
 241
 242         TP_fast_assign(
 243                 tp_memcpy(comm, current->comm, TASK_COMM_LEN)
 244                 tp_assign(pid, pid_nr(pid))
 245                 tp_assign(prio, current->prio)
 246         ),
 247
 248         TP_printk("comm=%s pid=%d prio=%d",
 249                   __entry->comm, __entry->pid, __entry->prio)
 250 )
 251
 252 /*
 253  * Tracepoint for do_fork:
 254  */
 255 TRACE_EVENT(sched_process_fork,
 256
 257         TP_PROTO(struct task_struct *parent, struct task_struct *child),
 258
 259         TP_ARGS(parent, child),
 260
 261         TP_STRUCT__entry(
 262                 __array_text(   char,   parent_comm,    TASK_COMM_LEN   )
 263                 __field(        pid_t,  parent_pid                      )
 264                 __array_text(   char,   child_comm,     TASK_COMM_LEN   )
 265                 __field(        pid_t,  child_pid                       )
 266         ),
 267
 268         TP_fast_assign(
 269                 tp_memcpy(parent_comm, parent->comm, TASK_COMM_LEN)
 270                 tp_assign(parent_pid, parent->pid)
 271                 tp_memcpy(child_comm, child->comm, TASK_COMM_LEN)
 272                 tp_assign(child_pid, child->pid)
 273         ),
 274
 275         TP_printk("comm=%s pid=%d child_comm=%s child_pid=%d",
 276                 __entry->parent_comm, __entry->parent_pid,
 277                 __entry->child_comm, __entry->child_pid)
 278 )
 279
 280 /*
 281  * XXX the below sched_stat tracepoints only apply to SCHED_OTHER/BATCH/IDLE
 282  *     adding sched_stat support to SCHED_FIFO/RR would be welcome.
 283  */
 284 DECLARE_EVENT_CLASS(sched_stat_template,
 285
 286         TP_PROTO(struct task_struct *tsk, u64 delay),
 287
 288         TP_ARGS(tsk, delay),
 289
 290         TP_STRUCT__entry(
 291                 __array_text( char,     comm,   TASK_COMM_LEN   )
 292                 __field( pid_t, pid                     )
 293                 __field( u64,   delay                   )
 294         ),
 295
 296         TP_fast_assign(
 297                 tp_memcpy(comm, tsk->comm, TASK_COMM_LEN)
 298                 tp_assign(pid,  tsk->pid)
 299                 tp_assign(delay, delay)
 300         )
 301         TP_perf_assign(
 302                 __perf_count(delay)
 303         ),
 304
 305         TP_printk("comm=%s pid=%d delay=%Lu [ns]",
 306                         __entry->comm, __entry->pid,
 307                         (unsigned long long)__entry->delay)
 308 )
 309
 310
 311 /*
 312  * Tracepoint for accounting wait time (time the task is runnable
 313  * but not actually running due to scheduler contention).
 314  */
 315 DEFINE_EVENT(sched_stat_template, sched_stat_wait,
 316              TP_PROTO(struct task_struct *tsk, u64 delay),
 317              TP_ARGS(tsk, delay))
 318
 319 /*
 320  * Tracepoint for accounting sleep time (time the task is not runnable,
 321  * including iowait, see below).
 322  */
 323 DEFINE_EVENT(sched_stat_template, sched_stat_sleep,
 324              TP_PROTO(struct task_struct *tsk, u64 delay),
 325              TP_ARGS(tsk, delay))
 326
 327 /*
 328  * Tracepoint for accounting iowait time (time the task is not runnable
 329  * due to waiting on IO to complete).
 330  */
 331 DEFINE_EVENT(sched_stat_template, sched_stat_iowait,
 332              TP_PROTO(struct task_struct *tsk, u64 delay),
 333              TP_ARGS(tsk, delay))
 334
 335 /*
 336  * Tracepoint for accounting runtime (time the task is executing
 337  * on a CPU).
 338  */
 339 TRACE_EVENT(sched_stat_runtime,
 340
 341         TP_PROTO(struct task_struct *tsk, u64 runtime, u64 vruntime),
 342
 343         TP_ARGS(tsk, runtime, vruntime),
 344
 345         TP_STRUCT__entry(
 346                 __array_text( char,     comm,   TASK_COMM_LEN   )
 347                 __field( pid_t, pid                     )
 348                 __field( u64,   runtime                 )
 349                 __field( u64,   vruntime                        )
 350         ),
 351
 352         TP_fast_assign(
 353                 tp_memcpy(comm, tsk->comm, TASK_COMM_LEN)
 354                 tp_assign(pid, tsk->pid)
 355                 tp_assign(runtime, runtime)
 356                 tp_assign(vruntime, vruntime)
 357         )
 358         TP_perf_assign(
 359                 __perf_count(runtime)
 360         ),
 361
 362         TP_printk("comm=%s pid=%d runtime=%Lu [ns] vruntime=%Lu [ns]",
 363                         __entry->comm, __entry->pid,
 364                         (unsigned long long)__entry->runtime,
 365                         (unsigned long long)__entry->vruntime)
 366 )
 367
 368 /*
 369  * Tracepoint for showing priority inheritance modifying a tasks
 370  * priority.
 371  */
 372 TRACE_EVENT(sched_pi_setprio,
 373
 374         TP_PROTO(struct task_struct *tsk, int newprio),
 375
 376         TP_ARGS(tsk, newprio),
 377
 378         TP_STRUCT__entry(
 379                 __array_text( char,     comm,   TASK_COMM_LEN   )
 380                 __field( pid_t, pid                     )
 381                 __field( int,   oldprio                 )
 382                 __field( int,   newprio                 )
 383         ),
 384
 385         TP_fast_assign(
 386                 tp_memcpy(comm, tsk->comm, TASK_COMM_LEN)
 387                 tp_assign(pid, tsk->pid)
 388                 tp_assign(oldprio, tsk->prio)
 389                 tp_assign(newprio, newprio)
 390         ),
 391
 392         TP_printk("comm=%s pid=%d oldprio=%d newprio=%d",
 393                         __entry->comm, __entry->pid,
 394                         __entry->oldprio, __entry->newprio)
 395 )
 396
 397 #endif /* _TRACE_SCHED_H */
 398
 399 /* This part must be outside protection */
 400 #include "define_trace.h"