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 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0))
  10 #include <linux/sched/rt.h>
  11 #endif
  12
  13 #ifndef _TRACE_SCHED_DEF_
  14 #define _TRACE_SCHED_DEF_
  15
  16 static inline long __trace_sched_switch_state(struct task_struct *p)
  17 {
  18         long state = p->state;
  19
  20 #ifdef CONFIG_PREEMPT
  21         /*
  22          * For all intents and purposes a preempted task is a running task.
  23          */
  24         if (task_thread_info(p)->preempt_count & PREEMPT_ACTIVE)
  25                 state = TASK_RUNNING;
  26 #endif
  27
  28         return state;
  29 }
  30
  31 #endif /* _TRACE_SCHED_DEF_ */
  32
  33 /*
  34  * Tracepoint for calling kthread_stop, performed to end a kthread:
  35  */
  36 TRACE_EVENT(sched_kthread_stop,
  37
  38         TP_PROTO(struct task_struct *t),
  39
  40         TP_ARGS(t),
  41
  42         TP_STRUCT__entry(
  43                 __array_text(   char,   comm,   TASK_COMM_LEN   )
  44                 __field(        pid_t,  tid                     )
  45         ),
  46
  47         TP_fast_assign(
  48                 tp_memcpy(comm, t->comm, TASK_COMM_LEN)
  49                 tp_assign(tid, t->pid)
  50         ),
  51
  52         TP_printk("comm=%s tid=%d", __entry->comm, __entry->tid)
  53 )
  54
  55 /*
  56  * Tracepoint for the return value of the kthread stopping:
  57  */
  58 TRACE_EVENT(sched_kthread_stop_ret,
  59
  60         TP_PROTO(int ret),
  61
  62         TP_ARGS(ret),
  63
  64         TP_STRUCT__entry(
  65                 __field(        int,    ret     )
  66         ),
  67
  68         TP_fast_assign(
  69                 tp_assign(ret, ret)
  70         ),
  71
  72         TP_printk("ret=%d", __entry->ret)
  73 )
  74
  75 /*
  76  * Tracepoint for waking up a task:
  77  */
  78 DECLARE_EVENT_CLASS(sched_wakeup_template,
  79
  80 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
  81         TP_PROTO(struct task_struct *p, int success),
  82
  83         TP_ARGS(p, success),
  84 #else
  85         TP_PROTO(struct rq *rq, struct task_struct *p, int success),
  86
  87         TP_ARGS(rq, p, success),
  88 #endif
  89
  90         TP_STRUCT__entry(
  91                 __array_text(   char,   comm,   TASK_COMM_LEN   )
  92                 __field(        pid_t,  tid                     )
  93                 __field(        int,    prio                    )
  94                 __field(        int,    success                 )
  95                 __field(        int,    target_cpu              )
  96         ),
  97
  98         TP_fast_assign(
  99                 tp_memcpy(comm, p->comm, TASK_COMM_LEN)
 100                 tp_assign(tid, p->pid)
 101                 tp_assign(prio, p->prio)
 102                 tp_assign(success, success)
 103                 tp_assign(target_cpu, task_cpu(p))
 104         ),
 105
 106         TP_printk("comm=%s tid=%d prio=%d success=%d target_cpu=%03d",
 107                   __entry->comm, __entry->tid, __entry->prio,
 108                   __entry->success, __entry->target_cpu)
 109 )
 110
 111 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
 112
 113 DEFINE_EVENT(sched_wakeup_template, sched_wakeup,
 114              TP_PROTO(struct task_struct *p, int success),
 115              TP_ARGS(p, success))
 116
 117 /*
 118  * Tracepoint for waking up a new task:
 119  */
 120 DEFINE_EVENT(sched_wakeup_template, sched_wakeup_new,
 121              TP_PROTO(struct task_struct *p, int success),
 122              TP_ARGS(p, success))
 123
 124 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) */
 125
 126 DEFINE_EVENT(sched_wakeup_template, sched_wakeup,
 127              TP_PROTO(struct rq *rq, struct task_struct *p, int success),
 128              TP_ARGS(rq, p, success))
 129
 130 /*
 131  * Tracepoint for waking up a new task:
 132  */
 133 DEFINE_EVENT(sched_wakeup_template, sched_wakeup_new,
 134              TP_PROTO(struct rq *rq, struct task_struct *p, int success),
 135              TP_ARGS(rq, p, success))
 136
 137 #endif /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) */
 138
 139 /*
 140  * Tracepoint for task switches, performed by the scheduler:
 141  */
 142 TRACE_EVENT(sched_switch,
 143
 144 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
 145         TP_PROTO(struct task_struct *prev,
 146                  struct task_struct *next),
 147
 148         TP_ARGS(prev, next),
 149 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) */
 150         TP_PROTO(struct rq *rq, struct task_struct *prev,
 151                  struct task_struct *next),
 152
 153         TP_ARGS(rq, prev, next),
 154 #endif /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) */
 155
 156         TP_STRUCT__entry(
 157                 __array_text(   char,   prev_comm,      TASK_COMM_LEN   )
 158                 __field(        pid_t,  prev_tid                        )
 159                 __field(        int,    prev_prio                       )
 160                 __field(        long,   prev_state                      )
 161                 __array_text(   char,   next_comm,      TASK_COMM_LEN   )
 162                 __field(        pid_t,  next_tid                        )
 163                 __field(        int,    next_prio                       )
 164         ),
 165
 166         TP_fast_assign(
 167                 tp_memcpy(next_comm, next->comm, TASK_COMM_LEN)
 168                 tp_assign(prev_tid, prev->pid)
 169                 tp_assign(prev_prio, prev->prio - MAX_RT_PRIO)
 170                 tp_assign(prev_state, __trace_sched_switch_state(prev))
 171                 tp_memcpy(prev_comm, prev->comm, TASK_COMM_LEN)
 172                 tp_assign(next_tid, next->pid)
 173                 tp_assign(next_prio, next->prio - MAX_RT_PRIO)
 174         ),
 175
 176         TP_printk("prev_comm=%s prev_tid=%d prev_prio=%d prev_state=%s ==> next_comm=%s next_tid=%d next_prio=%d",
 177                 __entry->prev_comm, __entry->prev_tid, __entry->prev_prio,
 178                 __entry->prev_state ?
 179                   __print_flags(__entry->prev_state, "|",
 180                                 { 1, "S"} , { 2, "D" }, { 4, "T" }, { 8, "t" },
 181                                 { 16, "Z" }, { 32, "X" }, { 64, "x" },
 182                                 { 128, "W" }) : "R",
 183                 __entry->next_comm, __entry->next_tid, __entry->next_prio)
 184 )
 185
 186 /*
 187  * Tracepoint for a task being migrated:
 188  */
 189 TRACE_EVENT(sched_migrate_task,
 190
 191         TP_PROTO(struct task_struct *p, int dest_cpu),
 192
 193         TP_ARGS(p, dest_cpu),
 194
 195         TP_STRUCT__entry(
 196                 __array_text(   char,   comm,   TASK_COMM_LEN   )
 197                 __field(        pid_t,  tid                     )
 198                 __field(        int,    prio                    )
 199                 __field(        int,    orig_cpu                )
 200                 __field(        int,    dest_cpu                )
 201         ),
 202
 203         TP_fast_assign(
 204                 tp_memcpy(comm, p->comm, TASK_COMM_LEN)
 205                 tp_assign(tid, p->pid)
 206                 tp_assign(prio, p->prio - MAX_RT_PRIO)
 207                 tp_assign(orig_cpu, task_cpu(p))
 208                 tp_assign(dest_cpu, dest_cpu)
 209         ),
 210
 211         TP_printk("comm=%s tid=%d prio=%d orig_cpu=%d dest_cpu=%d",
 212                   __entry->comm, __entry->tid, __entry->prio,
 213                   __entry->orig_cpu, __entry->dest_cpu)
 214 )
 215
 216 DECLARE_EVENT_CLASS(sched_process_template,
 217
 218         TP_PROTO(struct task_struct *p),
 219
 220         TP_ARGS(p),
 221
 222         TP_STRUCT__entry(
 223                 __array_text(   char,   comm,   TASK_COMM_LEN   )
 224                 __field(        pid_t,  tid                     )
 225                 __field(        int,    prio                    )
 226         ),
 227
 228         TP_fast_assign(
 229                 tp_memcpy(comm, p->comm, TASK_COMM_LEN)
 230                 tp_assign(tid, p->pid)
 231                 tp_assign(prio, p->prio - MAX_RT_PRIO)
 232         ),
 233
 234         TP_printk("comm=%s tid=%d prio=%d",
 235                   __entry->comm, __entry->tid, __entry->prio)
 236 )
 237
 238 /*
 239  * Tracepoint for freeing a task:
 240  */
 241 DEFINE_EVENT(sched_process_template, sched_process_free,
 242              TP_PROTO(struct task_struct *p),
 243              TP_ARGS(p))
 244
 245
 246 /*
 247  * Tracepoint for a task exiting:
 248  */
 249 DEFINE_EVENT(sched_process_template, sched_process_exit,
 250              TP_PROTO(struct task_struct *p),
 251              TP_ARGS(p))
 252
 253 /*
 254  * Tracepoint for waiting on task to unschedule:
 255  */
 256 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
 257 DEFINE_EVENT(sched_process_template, sched_wait_task,
 258         TP_PROTO(struct task_struct *p),
 259         TP_ARGS(p))
 260 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) */
 261 DEFINE_EVENT(sched_process_template, sched_wait_task,
 262         TP_PROTO(struct rq *rq, struct task_struct *p),
 263         TP_ARGS(rq, p))
 264 #endif /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) */
 265
 266 /*
 267  * Tracepoint for a waiting task:
 268  */
 269 TRACE_EVENT(sched_process_wait,
 270
 271         TP_PROTO(struct pid *pid),
 272
 273         TP_ARGS(pid),
 274
 275         TP_STRUCT__entry(
 276                 __array_text(   char,   comm,   TASK_COMM_LEN   )
 277                 __field(        pid_t,  tid                     )
 278                 __field(        int,    prio                    )
 279         ),
 280
 281         TP_fast_assign(
 282                 tp_memcpy(comm, current->comm, TASK_COMM_LEN)
 283                 tp_assign(tid, pid_nr(pid))
 284                 tp_assign(prio, current->prio - MAX_RT_PRIO)
 285         ),
 286
 287         TP_printk("comm=%s tid=%d prio=%d",
 288                   __entry->comm, __entry->tid, __entry->prio)
 289 )
 290
 291 /*
 292  * Tracepoint for do_fork:
 293  */
 294 TRACE_EVENT(sched_process_fork,
 295
 296         TP_PROTO(struct task_struct *parent, struct task_struct *child),
 297
 298         TP_ARGS(parent, child),
 299
 300         TP_STRUCT__entry(
 301                 __array_text(   char,   parent_comm,    TASK_COMM_LEN   )
 302                 __field(        pid_t,  parent_tid                      )
 303                 __array_text(   char,   child_comm,     TASK_COMM_LEN   )
 304                 __field(        pid_t,  child_tid                       )
 305         ),
 306
 307         TP_fast_assign(
 308                 tp_memcpy(parent_comm, parent->comm, TASK_COMM_LEN)
 309                 tp_assign(parent_tid, parent->pid)
 310                 tp_memcpy(child_comm, child->comm, TASK_COMM_LEN)
 311                 tp_assign(child_tid, child->pid)
 312         ),
 313
 314         TP_printk("comm=%s tid=%d child_comm=%s child_tid=%d",
 315                 __entry->parent_comm, __entry->parent_tid,
 316                 __entry->child_comm, __entry->child_tid)
 317 )
 318
 319 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
 320 /*
 321  * Tracepoint for exec:
 322  */
 323 TRACE_EVENT(sched_process_exec,
 324
 325         TP_PROTO(struct task_struct *p, pid_t old_pid,
 326                  struct linux_binprm *bprm),
 327
 328         TP_ARGS(p, old_pid, bprm),
 329
 330         TP_STRUCT__entry(
 331                 __string(       filename,       bprm->filename  )
 332                 __field(        pid_t,          pid             )
 333                 __field(        pid_t,          old_pid         )
 334         ),
 335
 336         TP_fast_assign(
 337                 tp_strcpy(filename, bprm->filename)
 338                 tp_assign(pid, p->pid)
 339                 tp_assign(old_pid, old_pid)
 340         ),
 341
 342         TP_printk("filename=%s pid=%d old_pid=%d", __get_str(filename),
 343                   __entry->pid, __entry->old_pid)
 344 )
 345 #endif
 346
 347 /*
 348  * XXX the below sched_stat tracepoints only apply to SCHED_OTHER/BATCH/IDLE
 349  *     adding sched_stat support to SCHED_FIFO/RR would be welcome.
 350  */
 351 DECLARE_EVENT_CLASS(sched_stat_template,
 352
 353         TP_PROTO(struct task_struct *tsk, u64 delay),
 354
 355         TP_ARGS(tsk, delay),
 356
 357         TP_STRUCT__entry(
 358                 __array_text( char,     comm,   TASK_COMM_LEN   )
 359                 __field( pid_t, tid                     )
 360                 __field( u64,   delay                   )
 361         ),
 362
 363         TP_fast_assign(
 364                 tp_memcpy(comm, tsk->comm, TASK_COMM_LEN)
 365                 tp_assign(tid,  tsk->pid)
 366                 tp_assign(delay, delay)
 367         )
 368         TP_perf_assign(
 369                 __perf_count(delay)
 370         ),
 371
 372         TP_printk("comm=%s tid=%d delay=%Lu [ns]",
 373                         __entry->comm, __entry->tid,
 374                         (unsigned long long)__entry->delay)
 375 )
 376
 377
 378 /*
 379  * Tracepoint for accounting wait time (time the task is runnable
 380  * but not actually running due to scheduler contention).
 381  */
 382 DEFINE_EVENT(sched_stat_template, sched_stat_wait,
 383              TP_PROTO(struct task_struct *tsk, u64 delay),
 384              TP_ARGS(tsk, delay))
 385
 386 /*
 387  * Tracepoint for accounting sleep time (time the task is not runnable,
 388  * including iowait, see below).
 389  */
 390 DEFINE_EVENT(sched_stat_template, sched_stat_sleep,
 391              TP_PROTO(struct task_struct *tsk, u64 delay),
 392              TP_ARGS(tsk, delay))
 393
 394 /*
 395  * Tracepoint for accounting iowait time (time the task is not runnable
 396  * due to waiting on IO to complete).
 397  */
 398 DEFINE_EVENT(sched_stat_template, sched_stat_iowait,
 399              TP_PROTO(struct task_struct *tsk, u64 delay),
 400              TP_ARGS(tsk, delay))
 401
 402 /*
 403  * Tracepoint for accounting runtime (time the task is executing
 404  * on a CPU).
 405  */
 406 TRACE_EVENT(sched_stat_runtime,
 407
 408         TP_PROTO(struct task_struct *tsk, u64 runtime, u64 vruntime),
 409
 410         TP_ARGS(tsk, runtime, vruntime),
 411
 412         TP_STRUCT__entry(
 413                 __array_text( char,     comm,   TASK_COMM_LEN   )
 414                 __field( pid_t, tid                     )
 415                 __field( u64,   runtime                 )
 416                 __field( u64,   vruntime                        )
 417         ),
 418
 419         TP_fast_assign(
 420                 tp_memcpy(comm, tsk->comm, TASK_COMM_LEN)
 421                 tp_assign(tid, tsk->pid)
 422                 tp_assign(runtime, runtime)
 423                 tp_assign(vruntime, vruntime)
 424         )
 425         TP_perf_assign(
 426                 __perf_count(runtime)
 427         ),
 428
 429         TP_printk("comm=%s tid=%d runtime=%Lu [ns] vruntime=%Lu [ns]",
 430                         __entry->comm, __entry->tid,
 431                         (unsigned long long)__entry->runtime,
 432                         (unsigned long long)__entry->vruntime)
 433 )
 434
 435 /*
 436  * Tracepoint for showing priority inheritance modifying a tasks
 437  * priority.
 438  */
 439 TRACE_EVENT(sched_pi_setprio,
 440
 441         TP_PROTO(struct task_struct *tsk, int newprio),
 442
 443         TP_ARGS(tsk, newprio),
 444
 445         TP_STRUCT__entry(
 446                 __array_text( char,     comm,   TASK_COMM_LEN   )
 447                 __field( pid_t, tid                     )
 448                 __field( int,   oldprio                 )
 449                 __field( int,   newprio                 )
 450         ),
 451
 452         TP_fast_assign(
 453                 tp_memcpy(comm, tsk->comm, TASK_COMM_LEN)
 454                 tp_assign(tid, tsk->pid)
 455                 tp_assign(oldprio, tsk->prio - MAX_RT_PRIO)
 456                 tp_assign(newprio, newprio - MAX_RT_PRIO)
 457         ),
 458
 459         TP_printk("comm=%s tid=%d oldprio=%d newprio=%d",
 460                         __entry->comm, __entry->tid,
 461                         __entry->oldprio, __entry->newprio)
 462 )
 463
 464 #endif /* _TRACE_SCHED_H */
 465
 466 /* This part must be outside protection */
 467 #include "../../../probes/define_trace.h"