instrumentation/events/lttng-module/sched.h

   1 #undef TRACE_SYSTEM
   2 #define TRACE_SYSTEM sched
   3
   4 #if !defined(LTTNG_TRACE_SCHED_H) || defined(TRACE_HEADER_MULTI_READ)
   5 #define LTTNG_TRACE_SCHED_H
   6
   7 #include "../../../probes/lttng-tracepoint-event.h"
   8 #include <linux/sched.h>
   9 #include <linux/pid_namespace.h>
  10 #include <linux/binfmts.h>
  11 #include <linux/version.h>
  12 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0))
  13 #include <linux/sched/rt.h>
  14 #endif
  15
  16 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,0))
  17 #define lttng_proc_inum ns.inum
  18 #else
  19 #define lttng_proc_inum proc_inum
  20 #endif
  21
  22 #define LTTNG_MAX_PID_NS_LEVEL 32
  23
  24 #ifndef _TRACE_SCHED_DEF_
  25 #define _TRACE_SCHED_DEF_
  26
  27 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,4,0))
  28
  29 static inline long __trace_sched_switch_state(bool preempt, struct task_struct *p)
  30 {
  31 #ifdef CONFIG_SCHED_DEBUG
  32         BUG_ON(p != current);
  33 #endif /* CONFIG_SCHED_DEBUG */
  34         /*
  35          * Preemption ignores task state, therefore preempted tasks are always RUNNING
  36          * (we will not have dequeued if state != RUNNING).
  37          */
  38         return preempt ? TASK_RUNNING | TASK_STATE_MAX : p->state;
  39 }
  40
  41 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,0))
  42
  43 static inline long __trace_sched_switch_state(struct task_struct *p)
  44 {
  45         long state = p->state;
  46
  47 #ifdef CONFIG_PREEMPT
  48 #ifdef CONFIG_SCHED_DEBUG
  49         BUG_ON(p != current);
  50 #endif /* CONFIG_SCHED_DEBUG */
  51         /*
  52          * For all intents and purposes a preempted task is a running task.
  53          */
  54         if (preempt_count() & PREEMPT_ACTIVE)
  55                 state = TASK_RUNNING | TASK_STATE_MAX;
  56 #endif  /* CONFIG_PREEMPT */
  57
  58         return state;
  59 }
  60
  61 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,13,0))
  62
  63 static inline long __trace_sched_switch_state(struct task_struct *p)
  64 {
  65         long state = p->state;
  66
  67 #ifdef CONFIG_PREEMPT
  68         /*
  69          * For all intents and purposes a preempted task is a running task.
  70          */
  71         if (task_preempt_count(p) & PREEMPT_ACTIVE)
  72                 state = TASK_RUNNING | TASK_STATE_MAX;
  73 #endif
  74
  75         return state;
  76 }
  77
  78 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,2,0))
  79
  80 static inline long __trace_sched_switch_state(struct task_struct *p)
  81 {
  82         long state = p->state;
  83
  84 #ifdef CONFIG_PREEMPT
  85         /*
  86          * For all intents and purposes a preempted task is a running task.
  87          */
  88         if (task_thread_info(p)->preempt_count & PREEMPT_ACTIVE)
  89                 state = TASK_RUNNING | TASK_STATE_MAX;
  90 #endif
  91
  92         return state;
  93 }
  94
  95 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
  96
  97 static inline long __trace_sched_switch_state(struct task_struct *p)
  98 {
  99         long state = p->state;
 100
 101 #ifdef CONFIG_PREEMPT
 102         /*
 103          * For all intents and purposes a preempted task is a running task.
 104          */
 105         if (task_thread_info(p)->preempt_count & PREEMPT_ACTIVE)
 106                 state = TASK_RUNNING;
 107 #endif
 108
 109         return state;
 110 }
 111
 112 #endif
 113
 114 #endif /* _TRACE_SCHED_DEF_ */
 115
 116 /*
 117  * Tracepoint for calling kthread_stop, performed to end a kthread:
 118  */
 119 LTTNG_TRACEPOINT_EVENT(sched_kthread_stop,
 120
 121         TP_PROTO(struct task_struct *t),
 122
 123         TP_ARGS(t),
 124
 125         TP_FIELDS(
 126                 ctf_array_text(char, comm, t->comm, TASK_COMM_LEN)
 127                 ctf_integer(pid_t, tid, t->pid)
 128         )
 129 )
 130
 131 /*
 132  * Tracepoint for the return value of the kthread stopping:
 133  */
 134 LTTNG_TRACEPOINT_EVENT(sched_kthread_stop_ret,
 135
 136         TP_PROTO(int ret),
 137
 138         TP_ARGS(ret),
 139
 140         TP_FIELDS(
 141                 ctf_integer(int, ret, ret)
 142         )
 143 )
 144
 145 /*
 146  * Tracepoint for waking up a task:
 147  */
 148 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,3,0))
 149 LTTNG_TRACEPOINT_EVENT_CLASS(sched_wakeup_template,
 150
 151         TP_PROTO(struct task_struct *p),
 152
 153         TP_ARGS(p),
 154
 155         TP_FIELDS(
 156                 ctf_array_text(char, comm, p->comm, TASK_COMM_LEN)
 157                 ctf_integer(pid_t, tid, p->pid)
 158                 ctf_integer(int, prio, p->prio)
 159                 ctf_integer(int, target_cpu, task_cpu(p))
 160         )
 161 )
 162 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,3,0)) */
 163 LTTNG_TRACEPOINT_EVENT_CLASS(sched_wakeup_template,
 164
 165 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
 166         TP_PROTO(struct task_struct *p, int success),
 167
 168         TP_ARGS(p, success),
 169 #else
 170         TP_PROTO(struct rq *rq, struct task_struct *p, int success),
 171
 172         TP_ARGS(rq, p, success),
 173 #endif
 174
 175         TP_FIELDS(
 176                 ctf_array_text(char, comm, p->comm, TASK_COMM_LEN)
 177                 ctf_integer(pid_t, tid, p->pid)
 178                 ctf_integer(int, prio, p->prio)
 179                 ctf_integer(int, success, success)
 180 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32))
 181                 ctf_integer(int, target_cpu, task_cpu(p))
 182 #endif
 183         )
 184 )
 185 #endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,3,0)) */
 186
 187 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,3,0))
 188
 189 /*
 190  * Tracepoint called when waking a task; this tracepoint is guaranteed to be
 191  * called from the waking context.
 192  */
 193 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_wakeup_template, sched_waking,
 194              TP_PROTO(struct task_struct *p),
 195              TP_ARGS(p))
 196
 197 /*
 198  * Tracepoint called when the task is actually woken; p->state == TASK_RUNNNG.
 199  * It it not always called from the waking context.
 200  */
 201 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_wakeup_template, sched_wakeup,
 202              TP_PROTO(struct task_struct *p),
 203              TP_ARGS(p))
 204
 205 /*
 206  * Tracepoint for waking up a new task:
 207  */
 208 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_wakeup_template, sched_wakeup_new,
 209              TP_PROTO(struct task_struct *p),
 210              TP_ARGS(p))
 211
 212 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
 213
 214 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_wakeup_template, sched_wakeup,
 215              TP_PROTO(struct task_struct *p, int success),
 216              TP_ARGS(p, success))
 217
 218 /*
 219  * Tracepoint for waking up a new task:
 220  */
 221 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_wakeup_template, sched_wakeup_new,
 222              TP_PROTO(struct task_struct *p, int success),
 223              TP_ARGS(p, success))
 224
 225 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) */
 226
 227 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_wakeup_template, sched_wakeup,
 228              TP_PROTO(struct rq *rq, struct task_struct *p, int success),
 229              TP_ARGS(rq, p, success))
 230
 231 /*
 232  * Tracepoint for waking up a new task:
 233  */
 234 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_wakeup_template, sched_wakeup_new,
 235              TP_PROTO(struct rq *rq, struct task_struct *p, int success),
 236              TP_ARGS(rq, p, success))
 237
 238 #endif /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) */
 239
 240 /*
 241  * Tracepoint for task switches, performed by the scheduler:
 242  */
 243 LTTNG_TRACEPOINT_EVENT(sched_switch,
 244
 245 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,4,0))
 246         TP_PROTO(bool preempt,
 247                  struct task_struct *prev,
 248                  struct task_struct *next),
 249
 250         TP_ARGS(preempt, prev, next),
 251 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
 252         TP_PROTO(struct task_struct *prev,
 253                  struct task_struct *next),
 254
 255         TP_ARGS(prev, next),
 256 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) */
 257         TP_PROTO(struct rq *rq, struct task_struct *prev,
 258                  struct task_struct *next),
 259
 260         TP_ARGS(rq, prev, next),
 261 #endif /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) */
 262
 263         TP_FIELDS(
 264                 ctf_array_text(char, prev_comm, prev->comm, TASK_COMM_LEN)
 265                 ctf_integer(pid_t, prev_tid, prev->pid)
 266                 ctf_integer(int, prev_prio, prev->prio - MAX_RT_PRIO)
 267 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,4,0))
 268                 ctf_integer(long, prev_state, __trace_sched_switch_state(preempt, prev))
 269 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
 270                 ctf_integer(long, prev_state, __trace_sched_switch_state(prev))
 271 #else
 272                 ctf_integer(long, prev_state, prev->state)
 273 #endif
 274                 ctf_array_text(char, next_comm, next->comm, TASK_COMM_LEN)
 275                 ctf_integer(pid_t, next_tid, next->pid)
 276                 ctf_integer(int, next_prio, next->prio - MAX_RT_PRIO)
 277         )
 278 )
 279
 280 /*
 281  * Tracepoint for a task being migrated:
 282  */
 283 LTTNG_TRACEPOINT_EVENT(sched_migrate_task,
 284
 285         TP_PROTO(struct task_struct *p, int dest_cpu),
 286
 287         TP_ARGS(p, dest_cpu),
 288
 289         TP_FIELDS(
 290                 ctf_array_text(char, comm, p->comm, TASK_COMM_LEN)
 291                 ctf_integer(pid_t, tid, p->pid)
 292                 ctf_integer(int, prio, p->prio - MAX_RT_PRIO)
 293                 ctf_integer(int, orig_cpu, task_cpu(p))
 294                 ctf_integer(int, dest_cpu, dest_cpu)
 295         )
 296 )
 297
 298 LTTNG_TRACEPOINT_EVENT_CLASS(sched_process_template,
 299
 300         TP_PROTO(struct task_struct *p),
 301
 302         TP_ARGS(p),
 303
 304         TP_FIELDS(
 305                 ctf_array_text(char, comm, p->comm, TASK_COMM_LEN)
 306                 ctf_integer(pid_t, tid, p->pid)
 307                 ctf_integer(int, prio, p->prio - MAX_RT_PRIO)
 308         )
 309 )
 310
 311 /*
 312  * Tracepoint for freeing a task:
 313  */
 314 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_process_template, sched_process_free,
 315              TP_PROTO(struct task_struct *p),
 316              TP_ARGS(p))
 317
 318
 319 /*
 320  * Tracepoint for a task exiting:
 321  */
 322 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_process_template, sched_process_exit,
 323              TP_PROTO(struct task_struct *p),
 324              TP_ARGS(p))
 325
 326 /*
 327  * Tracepoint for waiting on task to unschedule:
 328  */
 329 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
 330 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_process_template, sched_wait_task,
 331         TP_PROTO(struct task_struct *p),
 332         TP_ARGS(p))
 333 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) */
 334 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_process_template, sched_wait_task,
 335         TP_PROTO(struct rq *rq, struct task_struct *p),
 336         TP_ARGS(rq, p))
 337 #endif /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) */
 338
 339 /*
 340  * Tracepoint for a waiting task:
 341  */
 342 LTTNG_TRACEPOINT_EVENT(sched_process_wait,
 343
 344         TP_PROTO(struct pid *pid),
 345
 346         TP_ARGS(pid),
 347
 348         TP_FIELDS(
 349                 ctf_array_text(char, comm, current->comm, TASK_COMM_LEN)
 350                 ctf_integer(pid_t, tid, pid_nr(pid))
 351                 ctf_integer(int, prio, current->prio - MAX_RT_PRIO)
 352         )
 353 )
 354
 355 /*
 356  * Tracepoint for do_fork.
 357  * Saving both TID and PID information, especially for the child, allows
 358  * trace analyzers to distinguish between creation of a new process and
 359  * creation of a new thread. Newly created processes will have child_tid
 360  * == child_pid, while creation of a thread yields to child_tid !=
 361  * child_pid.
 362  */
 363 LTTNG_TRACEPOINT_EVENT_CODE(sched_process_fork,
 364
 365         TP_PROTO(struct task_struct *parent, struct task_struct *child),
 366
 367         TP_ARGS(parent, child),
 368
 369         TP_locvar(
 370                 pid_t vtids[LTTNG_MAX_PID_NS_LEVEL];
 371                 unsigned int ns_level;
 372         ),
 373
 374         TP_code_pre(
 375                 if (child) {
 376                         struct pid *child_pid;
 377                         unsigned int i;
 378
 379                         child_pid = task_pid(child);
 380                         tp_locvar->ns_level =
 381                                 min_t(unsigned int, child_pid->level + 1,
 382                                         LTTNG_MAX_PID_NS_LEVEL);
 383                         for (i = 0; i < tp_locvar->ns_level; i++)
 384                                 tp_locvar->vtids[i] = child_pid->numbers[i].nr;
 385                 }
 386         ),
 387
 388         TP_FIELDS(
 389                 ctf_array_text(char, parent_comm, parent->comm, TASK_COMM_LEN)
 390                 ctf_integer(pid_t, parent_tid, parent->pid)
 391                 ctf_integer(pid_t, parent_pid, parent->tgid)
 392 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
 393                 ctf_integer(unsigned int, parent_ns_inum,
 394                         ({
 395                                 unsigned int parent_ns_inum = 0;
 396
 397                                 if (parent) {
 398                                         struct pid_namespace *pid_ns;
 399
 400                                         pid_ns = task_active_pid_ns(parent);
 401                                         if (pid_ns)
 402                                                 parent_ns_inum =
 403                                                         pid_ns->lttng_proc_inum;
 404                                 }
 405                                 parent_ns_inum;
 406                         }))
 407 #endif
 408                 ctf_array_text(char, child_comm, child->comm, TASK_COMM_LEN)
 409                 ctf_integer(pid_t, child_tid, child->pid)
 410                 ctf_sequence(pid_t, vtids, tp_locvar->vtids, u8, tp_locvar->ns_level)
 411                 ctf_integer(pid_t, child_pid, child->tgid)
 412 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
 413                 ctf_integer(unsigned int, child_ns_inum,
 414                         ({
 415                                 unsigned int child_ns_inum = 0;
 416
 417                                 if (child) {
 418                                         struct pid_namespace *pid_ns;
 419
 420                                         pid_ns = task_active_pid_ns(child);
 421                                         if (pid_ns)
 422                                                 child_ns_inum =
 423                                                         pid_ns->lttng_proc_inum;
 424                                 }
 425                                 child_ns_inum;
 426                         }))
 427 #endif
 428         ),
 429
 430         TP_code_post()
 431 )
 432
 433 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,33))
 434 /*
 435  * Tracepoint for sending a signal:
 436  */
 437 LTTNG_TRACEPOINT_EVENT(sched_signal_send,
 438
 439         TP_PROTO(int sig, struct task_struct *p),
 440
 441         TP_ARGS(sig, p),
 442
 443         TP_FIELDS(
 444                 ctf_integer(int, sig, sig)
 445                 ctf_array_text(char, comm, p->comm, TASK_COMM_LEN)
 446                 ctf_integer(pid_t, tid, p->pid)
 447         )
 448 )
 449 #endif
 450
 451 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
 452 /*
 453  * Tracepoint for exec:
 454  */
 455 LTTNG_TRACEPOINT_EVENT(sched_process_exec,
 456
 457         TP_PROTO(struct task_struct *p, pid_t old_pid,
 458                  struct linux_binprm *bprm),
 459
 460         TP_ARGS(p, old_pid, bprm),
 461
 462         TP_FIELDS(
 463                 ctf_string(filename, bprm->filename)
 464                 ctf_integer(pid_t, tid, p->pid)
 465                 ctf_integer(pid_t, old_tid, old_pid)
 466         )
 467 )
 468 #endif
 469
 470 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32))
 471 /*
 472  * XXX the below sched_stat tracepoints only apply to SCHED_OTHER/BATCH/IDLE
 473  *     adding sched_stat support to SCHED_FIFO/RR would be welcome.
 474  */
 475 LTTNG_TRACEPOINT_EVENT_CLASS(sched_stat_template,
 476
 477         TP_PROTO(struct task_struct *tsk, u64 delay),
 478
 479         TP_ARGS(tsk, delay),
 480
 481         TP_FIELDS(
 482                 ctf_array_text(char, comm, tsk->comm, TASK_COMM_LEN)
 483                 ctf_integer(pid_t, tid, tsk->pid)
 484                 ctf_integer(u64, delay, delay)
 485         )
 486 )
 487
 488
 489 /*
 490  * Tracepoint for accounting wait time (time the task is runnable
 491  * but not actually running due to scheduler contention).
 492  */
 493 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_stat_template, sched_stat_wait,
 494              TP_PROTO(struct task_struct *tsk, u64 delay),
 495              TP_ARGS(tsk, delay))
 496
 497 /*
 498  * Tracepoint for accounting sleep time (time the task is not runnable,
 499  * including iowait, see below).
 500  */
 501 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_stat_template, sched_stat_sleep,
 502              TP_PROTO(struct task_struct *tsk, u64 delay),
 503              TP_ARGS(tsk, delay))
 504
 505 /*
 506  * Tracepoint for accounting iowait time (time the task is not runnable
 507  * due to waiting on IO to complete).
 508  */
 509 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_stat_template, sched_stat_iowait,
 510              TP_PROTO(struct task_struct *tsk, u64 delay),
 511              TP_ARGS(tsk, delay))
 512
 513 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 514 /*
 515  * Tracepoint for accounting blocked time (time the task is in uninterruptible).
 516  */
 517 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_stat_template, sched_stat_blocked,
 518              TP_PROTO(struct task_struct *tsk, u64 delay),
 519              TP_ARGS(tsk, delay))
 520 #endif
 521
 522 /*
 523  * Tracepoint for accounting runtime (time the task is executing
 524  * on a CPU).
 525  */
 526 LTTNG_TRACEPOINT_EVENT(sched_stat_runtime,
 527
 528         TP_PROTO(struct task_struct *tsk, u64 runtime, u64 vruntime),
 529
 530         TP_ARGS(tsk, runtime, vruntime),
 531
 532         TP_FIELDS(
 533                 ctf_array_text(char, comm, tsk->comm, TASK_COMM_LEN)
 534                 ctf_integer(pid_t, tid, tsk->pid)
 535                 ctf_integer(u64, runtime, runtime)
 536                 ctf_integer(u64, vruntime, vruntime)
 537         )
 538 )
 539 #endif
 540
 541 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37))
 542 /*
 543  * Tracepoint for showing priority inheritance modifying a tasks
 544  * priority.
 545  */
 546 LTTNG_TRACEPOINT_EVENT(sched_pi_setprio,
 547
 548         TP_PROTO(struct task_struct *tsk, int newprio),
 549
 550         TP_ARGS(tsk, newprio),
 551
 552         TP_FIELDS(
 553                 ctf_array_text(char, comm, tsk->comm, TASK_COMM_LEN)
 554                 ctf_integer(pid_t, tid, tsk->pid)
 555                 ctf_integer(int, oldprio, tsk->prio - MAX_RT_PRIO)
 556                 ctf_integer(int, newprio, newprio - MAX_RT_PRIO)
 557         )
 558 )
 559 #endif
 560
 561 #endif /* LTTNG_TRACE_SCHED_H */
 562
 563 /* This part must be outside protection */
 564 #include "../../../probes/define_trace.h"