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/binfmts.h>
  10 #include <linux/version.h>
  11 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0))
  12 #include <linux/sched/rt.h>
  13 #endif
  14
  15 #ifndef _TRACE_SCHED_DEF_
  16 #define _TRACE_SCHED_DEF_
  17
  18 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,13,0))
  19
  20 static inline long __trace_sched_switch_state(struct task_struct *p)
  21 {
  22         long state = p->state;
  23
  24 #ifdef CONFIG_PREEMPT
  25         /*
  26          * For all intents and purposes a preempted task is a running task.
  27          */
  28         if (task_preempt_count(p) & PREEMPT_ACTIVE)
  29                 state = TASK_RUNNING | TASK_STATE_MAX;
  30 #endif
  31
  32         return state;
  33 }
  34
  35 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,2,0))
  36
  37 static inline long __trace_sched_switch_state(struct task_struct *p)
  38 {
  39         long state = p->state;
  40
  41 #ifdef CONFIG_PREEMPT
  42         /*
  43          * For all intents and purposes a preempted task is a running task.
  44          */
  45         if (task_thread_info(p)->preempt_count & PREEMPT_ACTIVE)
  46                 state = TASK_RUNNING | TASK_STATE_MAX;
  47 #endif
  48
  49         return state;
  50 }
  51
  52 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
  53
  54 static inline long __trace_sched_switch_state(struct task_struct *p)
  55 {
  56         long state = p->state;
  57
  58 #ifdef CONFIG_PREEMPT
  59         /*
  60          * For all intents and purposes a preempted task is a running task.
  61          */
  62         if (task_thread_info(p)->preempt_count & PREEMPT_ACTIVE)
  63                 state = TASK_RUNNING;
  64 #endif
  65
  66         return state;
  67 }
  68
  69 #endif
  70
  71 #endif /* _TRACE_SCHED_DEF_ */
  72
  73 /*
  74  * Tracepoint for calling kthread_stop, performed to end a kthread:
  75  */
  76 LTTNG_TRACEPOINT_EVENT(sched_kthread_stop,
  77
  78         TP_PROTO(struct task_struct *t),
  79
  80         TP_ARGS(t),
  81
  82         TP_STRUCT__entry(
  83                 __array_text(   char,   comm,   TASK_COMM_LEN   )
  84                 __field(        pid_t,  tid                     )
  85         ),
  86
  87         TP_fast_assign(
  88                 tp_memcpy(comm, t->comm, TASK_COMM_LEN)
  89                 tp_assign(tid, t->pid)
  90         ),
  91
  92         TP_printk("comm=%s tid=%d", __entry->comm, __entry->tid)
  93 )
  94
  95 /*
  96  * Tracepoint for the return value of the kthread stopping:
  97  */
  98 LTTNG_TRACEPOINT_EVENT(sched_kthread_stop_ret,
  99
 100         TP_PROTO(int ret),
 101
 102         TP_ARGS(ret),
 103
 104         TP_STRUCT__entry(
 105                 __field(        int,    ret     )
 106         ),
 107
 108         TP_fast_assign(
 109                 tp_assign(ret, ret)
 110         ),
 111
 112         TP_printk("ret=%d", __entry->ret)
 113 )
 114
 115 /*
 116  * Tracepoint for waking up a task:
 117  */
 118 LTTNG_TRACEPOINT_EVENT_CLASS(sched_wakeup_template,
 119
 120 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
 121         TP_PROTO(struct task_struct *p, int success),
 122
 123         TP_ARGS(p, success),
 124 #else
 125         TP_PROTO(struct rq *rq, struct task_struct *p, int success),
 126
 127         TP_ARGS(rq, p, success),
 128 #endif
 129
 130         TP_STRUCT__entry(
 131                 __array_text(   char,   comm,   TASK_COMM_LEN   )
 132                 __field(        pid_t,  tid                     )
 133                 __field(        int,    prio                    )
 134                 __field(        int,    success                 )
 135 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32))
 136                 __field(        int,    target_cpu              )
 137 #endif
 138         ),
 139
 140         TP_fast_assign(
 141                 tp_memcpy(comm, p->comm, TASK_COMM_LEN)
 142                 tp_assign(tid, p->pid)
 143                 tp_assign(prio, p->prio)
 144                 tp_assign(success, success)
 145 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32))
 146                 tp_assign(target_cpu, task_cpu(p))
 147 #endif
 148 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
 149         )
 150         TP_perf_assign(
 151                 __perf_task(p)
 152 #endif
 153         ),
 154
 155 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32))
 156         TP_printk("comm=%s tid=%d prio=%d success=%d target_cpu=%03d",
 157                   __entry->comm, __entry->tid, __entry->prio,
 158                   __entry->success, __entry->target_cpu)
 159 #else
 160         TP_printk("comm=%s tid=%d prio=%d success=%d",
 161                   __entry->comm, __entry->tid, __entry->prio,
 162                   __entry->success)
 163 #endif
 164 )
 165
 166 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
 167
 168 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_wakeup_template, sched_wakeup,
 169              TP_PROTO(struct task_struct *p, int success),
 170              TP_ARGS(p, success))
 171
 172 /*
 173  * Tracepoint for waking up a new task:
 174  */
 175 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_wakeup_template, sched_wakeup_new,
 176              TP_PROTO(struct task_struct *p, int success),
 177              TP_ARGS(p, success))
 178
 179 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) */
 180
 181 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_wakeup_template, sched_wakeup,
 182              TP_PROTO(struct rq *rq, struct task_struct *p, int success),
 183              TP_ARGS(rq, p, success))
 184
 185 /*
 186  * Tracepoint for waking up a new task:
 187  */
 188 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_wakeup_template, sched_wakeup_new,
 189              TP_PROTO(struct rq *rq, struct task_struct *p, int success),
 190              TP_ARGS(rq, p, success))
 191
 192 #endif /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) */
 193
 194 /*
 195  * Tracepoint for task switches, performed by the scheduler:
 196  */
 197 LTTNG_TRACEPOINT_EVENT(sched_switch,
 198
 199 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
 200         TP_PROTO(struct task_struct *prev,
 201                  struct task_struct *next),
 202
 203         TP_ARGS(prev, next),
 204 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) */
 205         TP_PROTO(struct rq *rq, struct task_struct *prev,
 206                  struct task_struct *next),
 207
 208         TP_ARGS(rq, prev, next),
 209 #endif /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) */
 210
 211         TP_STRUCT__entry(
 212                 __array_text(   char,   prev_comm,      TASK_COMM_LEN   )
 213                 __field(        pid_t,  prev_tid                        )
 214                 __field(        int,    prev_prio                       )
 215                 __field(        long,   prev_state                      )
 216                 __array_text(   char,   next_comm,      TASK_COMM_LEN   )
 217                 __field(        pid_t,  next_tid                        )
 218                 __field(        int,    next_prio                       )
 219         ),
 220
 221         TP_fast_assign(
 222                 tp_memcpy(next_comm, next->comm, TASK_COMM_LEN)
 223                 tp_assign(prev_tid, prev->pid)
 224                 tp_assign(prev_prio, prev->prio - MAX_RT_PRIO)
 225 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
 226                 tp_assign(prev_state, __trace_sched_switch_state(prev))
 227 #else
 228                 tp_assign(prev_state, prev->state)
 229 #endif
 230                 tp_memcpy(prev_comm, prev->comm, TASK_COMM_LEN)
 231                 tp_assign(next_tid, next->pid)
 232                 tp_assign(next_prio, next->prio - MAX_RT_PRIO)
 233         ),
 234
 235 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,2,0))
 236         TP_printk("prev_comm=%s prev_tid=%d prev_prio=%d prev_state=%s%s ==> next_comm=%s next_tid=%d next_prio=%d",
 237                 __entry->prev_comm, __entry->prev_tid, __entry->prev_prio,
 238                 __entry->prev_state & (TASK_STATE_MAX-1) ?
 239                   __print_flags(__entry->prev_state & (TASK_STATE_MAX-1), "|",
 240                                 { 1, "S"} , { 2, "D" }, { 4, "T" }, { 8, "t" },
 241                                 { 16, "Z" }, { 32, "X" }, { 64, "x" },
 242                                 { 128, "W" }) : "R",
 243                 __entry->prev_state & TASK_STATE_MAX ? "+" : "",
 244                 __entry->next_comm, __entry->next_tid, __entry->next_prio)
 245 #else
 246         TP_printk("prev_comm=%s prev_tid=%d prev_prio=%d prev_state=%s ==> next_comm=%s next_tid=%d next_prio=%d",
 247                 __entry->prev_comm, __entry->prev_tid, __entry->prev_prio,
 248                 __entry->prev_state ?
 249                   __print_flags(__entry->prev_state, "|",
 250                                 { 1, "S"} , { 2, "D" }, { 4, "T" }, { 8, "t" },
 251                                 { 16, "Z" }, { 32, "X" }, { 64, "x" },
 252                                 { 128, "W" }) : "R",
 253                 __entry->next_comm, __entry->next_tid, __entry->next_prio)
 254 #endif
 255 )
 256
 257 /*
 258  * Tracepoint for a task being migrated:
 259  */
 260 LTTNG_TRACEPOINT_EVENT(sched_migrate_task,
 261
 262         TP_PROTO(struct task_struct *p, int dest_cpu),
 263
 264         TP_ARGS(p, dest_cpu),
 265
 266         TP_STRUCT__entry(
 267                 __array_text(   char,   comm,   TASK_COMM_LEN   )
 268                 __field(        pid_t,  tid                     )
 269                 __field(        int,    prio                    )
 270                 __field(        int,    orig_cpu                )
 271                 __field(        int,    dest_cpu                )
 272         ),
 273
 274         TP_fast_assign(
 275                 tp_memcpy(comm, p->comm, TASK_COMM_LEN)
 276                 tp_assign(tid, p->pid)
 277                 tp_assign(prio, p->prio - MAX_RT_PRIO)
 278                 tp_assign(orig_cpu, task_cpu(p))
 279                 tp_assign(dest_cpu, dest_cpu)
 280         ),
 281
 282         TP_printk("comm=%s tid=%d prio=%d orig_cpu=%d dest_cpu=%d",
 283                   __entry->comm, __entry->tid, __entry->prio,
 284                   __entry->orig_cpu, __entry->dest_cpu)
 285 )
 286
 287 LTTNG_TRACEPOINT_EVENT_CLASS(sched_process_template,
 288
 289         TP_PROTO(struct task_struct *p),
 290
 291         TP_ARGS(p),
 292
 293         TP_STRUCT__entry(
 294                 __array_text(   char,   comm,   TASK_COMM_LEN   )
 295                 __field(        pid_t,  tid                     )
 296                 __field(        int,    prio                    )
 297         ),
 298
 299         TP_fast_assign(
 300                 tp_memcpy(comm, p->comm, TASK_COMM_LEN)
 301                 tp_assign(tid, p->pid)
 302                 tp_assign(prio, p->prio - MAX_RT_PRIO)
 303         ),
 304
 305         TP_printk("comm=%s tid=%d prio=%d",
 306                   __entry->comm, __entry->tid, __entry->prio)
 307 )
 308
 309 /*
 310  * Tracepoint for freeing a task:
 311  */
 312 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_process_template, sched_process_free,
 313              TP_PROTO(struct task_struct *p),
 314              TP_ARGS(p))
 315
 316
 317 /*
 318  * Tracepoint for a task exiting:
 319  */
 320 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_process_template, sched_process_exit,
 321              TP_PROTO(struct task_struct *p),
 322              TP_ARGS(p))
 323
 324 /*
 325  * Tracepoint for waiting on task to unschedule:
 326  */
 327 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
 328 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_process_template, sched_wait_task,
 329         TP_PROTO(struct task_struct *p),
 330         TP_ARGS(p))
 331 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) */
 332 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_process_template, sched_wait_task,
 333         TP_PROTO(struct rq *rq, struct task_struct *p),
 334         TP_ARGS(rq, p))
 335 #endif /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) */
 336
 337 /*
 338  * Tracepoint for a waiting task:
 339  */
 340 LTTNG_TRACEPOINT_EVENT(sched_process_wait,
 341
 342         TP_PROTO(struct pid *pid),
 343
 344         TP_ARGS(pid),
 345
 346         TP_STRUCT__entry(
 347                 __array_text(   char,   comm,   TASK_COMM_LEN   )
 348                 __field(        pid_t,  tid                     )
 349                 __field(        int,    prio                    )
 350         ),
 351
 352         TP_fast_assign(
 353                 tp_memcpy(comm, current->comm, TASK_COMM_LEN)
 354                 tp_assign(tid, pid_nr(pid))
 355                 tp_assign(prio, current->prio - MAX_RT_PRIO)
 356         ),
 357
 358         TP_printk("comm=%s tid=%d prio=%d",
 359                   __entry->comm, __entry->tid, __entry->prio)
 360 )
 361
 362 /*
 363  * Tracepoint for do_fork.
 364  * Saving both TID and PID information, especially for the child, allows
 365  * trace analyzers to distinguish between creation of a new process and
 366  * creation of a new thread. Newly created processes will have child_tid
 367  * == child_pid, while creation of a thread yields to child_tid !=
 368  * child_pid.
 369  */
 370 LTTNG_TRACEPOINT_EVENT(sched_process_fork,
 371
 372         TP_PROTO(struct task_struct *parent, struct task_struct *child),
 373
 374         TP_ARGS(parent, child),
 375
 376         TP_STRUCT__entry(
 377                 __array_text(   char,   parent_comm,    TASK_COMM_LEN   )
 378                 __field(        pid_t,  parent_tid                      )
 379                 __field(        pid_t,  parent_pid                      )
 380                 __array_text(   char,   child_comm,     TASK_COMM_LEN   )
 381                 __field(        pid_t,  child_tid                       )
 382                 __field(        pid_t,  child_pid                       )
 383         ),
 384
 385         TP_fast_assign(
 386                 tp_memcpy(parent_comm, parent->comm, TASK_COMM_LEN)
 387                 tp_assign(parent_tid, parent->pid)
 388                 tp_assign(parent_pid, parent->tgid)
 389                 tp_memcpy(child_comm, child->comm, TASK_COMM_LEN)
 390                 tp_assign(child_tid, child->pid)
 391                 tp_assign(child_pid, child->tgid)
 392         ),
 393
 394         TP_printk("comm=%s tid=%d child_comm=%s child_tid=%d",
 395                 __entry->parent_comm, __entry->parent_tid,
 396                 __entry->child_comm, __entry->child_tid)
 397 )
 398
 399 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,33))
 400 /*
 401  * Tracepoint for sending a signal:
 402  */
 403 LTTNG_TRACEPOINT_EVENT(sched_signal_send,
 404
 405         TP_PROTO(int sig, struct task_struct *p),
 406
 407         TP_ARGS(sig, p),
 408
 409         TP_STRUCT__entry(
 410                 __field(        int,    sig                     )
 411                 __array(        char,   comm,   TASK_COMM_LEN   )
 412                 __field(        pid_t,  pid                     )
 413         ),
 414
 415         TP_fast_assign(
 416                 tp_memcpy(comm, p->comm, TASK_COMM_LEN)
 417                 tp_assign(pid, p->pid)
 418                 tp_assign(sig, sig)
 419         ),
 420
 421         TP_printk("sig=%d comm=%s pid=%d",
 422                 __entry->sig, __entry->comm, __entry->pid)
 423 )
 424 #endif
 425
 426 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
 427 /*
 428  * Tracepoint for exec:
 429  */
 430 LTTNG_TRACEPOINT_EVENT(sched_process_exec,
 431
 432         TP_PROTO(struct task_struct *p, pid_t old_pid,
 433                  struct linux_binprm *bprm),
 434
 435         TP_ARGS(p, old_pid, bprm),
 436
 437         TP_STRUCT__entry(
 438                 __string(       filename,       bprm->filename  )
 439                 __field(        pid_t,          tid             )
 440                 __field(        pid_t,          old_tid         )
 441         ),
 442
 443         TP_fast_assign(
 444                 tp_strcpy(filename, bprm->filename)
 445                 tp_assign(tid, p->pid)
 446                 tp_assign(old_tid, old_pid)
 447         ),
 448
 449         TP_printk("filename=%s tid=%d old_tid=%d", __get_str(filename),
 450                   __entry->tid, __entry->old_tid)
 451 )
 452 #endif
 453
 454 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32))
 455 /*
 456  * XXX the below sched_stat tracepoints only apply to SCHED_OTHER/BATCH/IDLE
 457  *     adding sched_stat support to SCHED_FIFO/RR would be welcome.
 458  */
 459 LTTNG_TRACEPOINT_EVENT_CLASS(sched_stat_template,
 460
 461         TP_PROTO(struct task_struct *tsk, u64 delay),
 462
 463         TP_ARGS(tsk, delay),
 464
 465         TP_STRUCT__entry(
 466                 __array_text( char,     comm,   TASK_COMM_LEN   )
 467                 __field( pid_t, tid                     )
 468                 __field( u64,   delay                   )
 469         ),
 470
 471         TP_fast_assign(
 472                 tp_memcpy(comm, tsk->comm, TASK_COMM_LEN)
 473                 tp_assign(tid,  tsk->pid)
 474                 tp_assign(delay, delay)
 475         )
 476         TP_perf_assign(
 477                 __perf_count(delay)
 478         ),
 479
 480         TP_printk("comm=%s tid=%d delay=%Lu [ns]",
 481                         __entry->comm, __entry->tid,
 482                         (unsigned long long)__entry->delay)
 483 )
 484
 485
 486 /*
 487  * Tracepoint for accounting wait time (time the task is runnable
 488  * but not actually running due to scheduler contention).
 489  */
 490 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_stat_template, sched_stat_wait,
 491              TP_PROTO(struct task_struct *tsk, u64 delay),
 492              TP_ARGS(tsk, delay))
 493
 494 /*
 495  * Tracepoint for accounting sleep time (time the task is not runnable,
 496  * including iowait, see below).
 497  */
 498 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_stat_template, sched_stat_sleep,
 499              TP_PROTO(struct task_struct *tsk, u64 delay),
 500              TP_ARGS(tsk, delay))
 501
 502 /*
 503  * Tracepoint for accounting iowait time (time the task is not runnable
 504  * due to waiting on IO to complete).
 505  */
 506 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_stat_template, sched_stat_iowait,
 507              TP_PROTO(struct task_struct *tsk, u64 delay),
 508              TP_ARGS(tsk, delay))
 509
 510 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 511 /*
 512  * Tracepoint for accounting blocked time (time the task is in uninterruptible).
 513  */
 514 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_stat_template, sched_stat_blocked,
 515              TP_PROTO(struct task_struct *tsk, u64 delay),
 516              TP_ARGS(tsk, delay))
 517 #endif
 518
 519 /*
 520  * Tracepoint for accounting runtime (time the task is executing
 521  * on a CPU).
 522  */
 523 LTTNG_TRACEPOINT_EVENT(sched_stat_runtime,
 524
 525         TP_PROTO(struct task_struct *tsk, u64 runtime, u64 vruntime),
 526
 527         TP_ARGS(tsk, runtime, vruntime),
 528
 529         TP_STRUCT__entry(
 530                 __array_text( char,     comm,   TASK_COMM_LEN   )
 531                 __field( pid_t, tid                     )
 532                 __field( u64,   runtime                 )
 533                 __field( u64,   vruntime                        )
 534         ),
 535
 536         TP_fast_assign(
 537                 tp_memcpy(comm, tsk->comm, TASK_COMM_LEN)
 538                 tp_assign(tid, tsk->pid)
 539                 tp_assign(runtime, runtime)
 540                 tp_assign(vruntime, vruntime)
 541         )
 542         TP_perf_assign(
 543                 __perf_count(runtime)
 544 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
 545                 __perf_task(tsk)
 546 #endif
 547         ),
 548
 549         TP_printk("comm=%s tid=%d runtime=%Lu [ns] vruntime=%Lu [ns]",
 550                         __entry->comm, __entry->tid,
 551                         (unsigned long long)__entry->runtime,
 552                         (unsigned long long)__entry->vruntime)
 553 )
 554 #endif
 555
 556 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37))
 557 /*
 558  * Tracepoint for showing priority inheritance modifying a tasks
 559  * priority.
 560  */
 561 LTTNG_TRACEPOINT_EVENT(sched_pi_setprio,
 562
 563         TP_PROTO(struct task_struct *tsk, int newprio),
 564
 565         TP_ARGS(tsk, newprio),
 566
 567         TP_STRUCT__entry(
 568                 __array_text( char,     comm,   TASK_COMM_LEN   )
 569                 __field( pid_t, tid                     )
 570                 __field( int,   oldprio                 )
 571                 __field( int,   newprio                 )
 572         ),
 573
 574         TP_fast_assign(
 575                 tp_memcpy(comm, tsk->comm, TASK_COMM_LEN)
 576                 tp_assign(tid, tsk->pid)
 577                 tp_assign(oldprio, tsk->prio - MAX_RT_PRIO)
 578                 tp_assign(newprio, newprio - MAX_RT_PRIO)
 579         ),
 580
 581         TP_printk("comm=%s tid=%d oldprio=%d newprio=%d",
 582                         __entry->comm, __entry->tid,
 583                         __entry->oldprio, __entry->newprio)
 584 )
 585 #endif
 586
 587 #endif /* LTTNG_TRACE_SCHED_H */
 588
 589 /* This part must be outside protection */
 590 #include "../../../probes/define_trace.h"