instrumentation/events/lttng-module/sched.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #undef TRACE_SYSTEM
   3 #define TRACE_SYSTEM sched
   4
   5 #if !defined(LTTNG_TRACE_SCHED_H) || defined(TRACE_HEADER_MULTI_READ)
   6 #define LTTNG_TRACE_SCHED_H
   7
   8 #include <probes/lttng-tracepoint-event.h>
   9 #include <linux/sched.h>
  10 #include <linux/pid_namespace.h>
  11 #include <linux/binfmts.h>
  12 #include <linux/version.h>
  13 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0))
  14 #include <linux/sched/rt.h>
  15 #endif
  16
  17 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,0))
  18 #define lttng_proc_inum ns.inum
  19 #else
  20 #define lttng_proc_inum proc_inum
  21 #endif
  22
  23 #define LTTNG_MAX_PID_NS_LEVEL 32
  24
  25 #ifndef _TRACE_SCHED_DEF_
  26 #define _TRACE_SCHED_DEF_
  27
  28 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,4,0))
  29
  30 static inline long __trace_sched_switch_state(bool preempt, struct task_struct *p)
  31 {
  32 #ifdef CONFIG_SCHED_DEBUG
  33         BUG_ON(p != current);
  34 #endif /* CONFIG_SCHED_DEBUG */
  35         /*
  36          * Preemption ignores task state, therefore preempted tasks are always RUNNING
  37          * (we will not have dequeued if state != RUNNING).
  38          */
  39         return preempt ? TASK_RUNNING | TASK_STATE_MAX : p->state;
  40 }
  41
  42 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,0))
  43
  44 static inline long __trace_sched_switch_state(struct task_struct *p)
  45 {
  46         long state = p->state;
  47
  48 #ifdef CONFIG_PREEMPT
  49 #ifdef CONFIG_SCHED_DEBUG
  50         BUG_ON(p != current);
  51 #endif /* CONFIG_SCHED_DEBUG */
  52         /*
  53          * For all intents and purposes a preempted task is a running task.
  54          */
  55         if (preempt_count() & PREEMPT_ACTIVE)
  56                 state = TASK_RUNNING | TASK_STATE_MAX;
  57 #endif  /* CONFIG_PREEMPT */
  58
  59         return state;
  60 }
  61
  62 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,13,0))
  63
  64 static inline long __trace_sched_switch_state(struct task_struct *p)
  65 {
  66         long state = p->state;
  67
  68 #ifdef CONFIG_PREEMPT
  69         /*
  70          * For all intents and purposes a preempted task is a running task.
  71          */
  72         if (task_preempt_count(p) & PREEMPT_ACTIVE)
  73                 state = TASK_RUNNING | TASK_STATE_MAX;
  74 #endif
  75
  76         return state;
  77 }
  78
  79 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,2,0))
  80
  81 static inline long __trace_sched_switch_state(struct task_struct *p)
  82 {
  83         long state = p->state;
  84
  85 #ifdef CONFIG_PREEMPT
  86         /*
  87          * For all intents and purposes a preempted task is a running task.
  88          */
  89         if (task_thread_info(p)->preempt_count & PREEMPT_ACTIVE)
  90                 state = TASK_RUNNING | TASK_STATE_MAX;
  91 #endif
  92
  93         return state;
  94 }
  95
  96 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
  97
  98 static inline long __trace_sched_switch_state(struct task_struct *p)
  99 {
 100         long state = p->state;
 101
 102 #ifdef CONFIG_PREEMPT
 103         /*
 104          * For all intents and purposes a preempted task is a running task.
 105          */
 106         if (task_thread_info(p)->preempt_count & PREEMPT_ACTIVE)
 107                 state = TASK_RUNNING;
 108 #endif
 109
 110         return state;
 111 }
 112
 113 #endif
 114
 115 #endif /* _TRACE_SCHED_DEF_ */
 116
 117 /*
 118  * Tracepoint for calling kthread_stop, performed to end a kthread:
 119  */
 120 LTTNG_TRACEPOINT_EVENT(sched_kthread_stop,
 121
 122         TP_PROTO(struct task_struct *t),
 123
 124         TP_ARGS(t),
 125
 126         TP_FIELDS(
 127                 ctf_array_text(char, comm, t->comm, TASK_COMM_LEN)
 128                 ctf_integer(pid_t, tid, t->pid)
 129         )
 130 )
 131
 132 /*
 133  * Tracepoint for the return value of the kthread stopping:
 134  */
 135 LTTNG_TRACEPOINT_EVENT(sched_kthread_stop_ret,
 136
 137         TP_PROTO(int ret),
 138
 139         TP_ARGS(ret),
 140
 141         TP_FIELDS(
 142                 ctf_integer(int, ret, ret)
 143         )
 144 )
 145
 146 /*
 147  * Tracepoint for waking up a task:
 148  */
 149 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,3,0) || \
 150         LTTNG_RT_KERNEL_RANGE(4,1,10,11, 4,2,0,0) || \
 151         LTTNG_RT_KERNEL_RANGE(3,18,27,26, 3,19,0,0) || \
 152         LTTNG_RT_KERNEL_RANGE(3,14,61,63, 3,15,0,0) || \
 153         LTTNG_RT_KERNEL_RANGE(3,12,54,73, 3,13,0,0) || \
 154         LTTNG_RT_KERNEL_RANGE(3,10,97,106, 3,11,0,0) || \
 155         LTTNG_RT_KERNEL_RANGE(3,4,110,139, 3,5,0,0) || \
 156         LTTNG_RT_KERNEL_RANGE(3,2,77,111, 3,3,0,0))
 157 LTTNG_TRACEPOINT_EVENT_CLASS(sched_wakeup_template,
 158
 159         TP_PROTO(struct task_struct *p),
 160
 161         TP_ARGS(p),
 162
 163         TP_FIELDS(
 164                 ctf_array_text(char, comm, p->comm, TASK_COMM_LEN)
 165                 ctf_integer(pid_t, tid, p->pid)
 166                 ctf_integer(int, prio, p->prio - MAX_RT_PRIO)
 167                 ctf_integer(int, target_cpu, task_cpu(p))
 168         )
 169 )
 170 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,3,0)) */
 171 LTTNG_TRACEPOINT_EVENT_CLASS(sched_wakeup_template,
 172
 173 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
 174         TP_PROTO(struct task_struct *p, int success),
 175
 176         TP_ARGS(p, success),
 177 #else
 178         TP_PROTO(struct rq *rq, struct task_struct *p, int success),
 179
 180         TP_ARGS(rq, p, success),
 181 #endif
 182
 183         TP_FIELDS(
 184                 ctf_array_text(char, comm, p->comm, TASK_COMM_LEN)
 185                 ctf_integer(pid_t, tid, p->pid)
 186                 ctf_integer(int, prio, p->prio - MAX_RT_PRIO)
 187                 ctf_integer(int, success, success)
 188 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32))
 189                 ctf_integer(int, target_cpu, task_cpu(p))
 190 #endif
 191         )
 192 )
 193 #endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,3,0)) */
 194
 195 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,3,0) || \
 196         LTTNG_RT_KERNEL_RANGE(4,1,10,11, 4,2,0,0) || \
 197         LTTNG_RT_KERNEL_RANGE(3,18,27,26, 3,19,0,0) || \
 198         LTTNG_RT_KERNEL_RANGE(3,14,61,63, 3,15,0,0) || \
 199         LTTNG_RT_KERNEL_RANGE(3,12,54,73, 3,13,0,0) || \
 200         LTTNG_RT_KERNEL_RANGE(3,10,97,106, 3,11,0,0) || \
 201         LTTNG_RT_KERNEL_RANGE(3,4,110,139, 3,5,0,0) || \
 202         LTTNG_RT_KERNEL_RANGE(3,2,77,111, 3,3,0,0))
 203
 204 /*
 205  * Tracepoint called when waking a task; this tracepoint is guaranteed to be
 206  * called from the waking context.
 207  */
 208 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_wakeup_template, sched_waking,
 209              TP_PROTO(struct task_struct *p),
 210              TP_ARGS(p))
 211
 212 /*
 213  * Tracepoint called when the task is actually woken; p->state == TASK_RUNNNG.
 214  * It it not always called from the waking context.
 215  */
 216 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_wakeup_template, sched_wakeup,
 217              TP_PROTO(struct task_struct *p),
 218              TP_ARGS(p))
 219
 220 /*
 221  * Tracepoint for waking up a new task:
 222  */
 223 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_wakeup_template, sched_wakeup_new,
 224              TP_PROTO(struct task_struct *p),
 225              TP_ARGS(p))
 226
 227 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
 228
 229 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_wakeup_template, sched_wakeup,
 230              TP_PROTO(struct task_struct *p, int success),
 231              TP_ARGS(p, success))
 232
 233 /*
 234  * Tracepoint for waking up a new task:
 235  */
 236 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_wakeup_template, sched_wakeup_new,
 237              TP_PROTO(struct task_struct *p, int success),
 238              TP_ARGS(p, success))
 239
 240 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) */
 241
 242 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_wakeup_template, sched_wakeup,
 243              TP_PROTO(struct rq *rq, struct task_struct *p, int success),
 244              TP_ARGS(rq, p, success))
 245
 246 /*
 247  * Tracepoint for waking up a new task:
 248  */
 249 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_wakeup_template, sched_wakeup_new,
 250              TP_PROTO(struct rq *rq, struct task_struct *p, int success),
 251              TP_ARGS(rq, p, success))
 252
 253 #endif /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) */
 254
 255 /*
 256  * Tracepoint for task switches, performed by the scheduler:
 257  */
 258 LTTNG_TRACEPOINT_EVENT(sched_switch,
 259
 260 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,4,0))
 261         TP_PROTO(bool preempt,
 262                  struct task_struct *prev,
 263                  struct task_struct *next),
 264
 265         TP_ARGS(preempt, prev, next),
 266 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
 267         TP_PROTO(struct task_struct *prev,
 268                  struct task_struct *next),
 269
 270         TP_ARGS(prev, next),
 271 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) */
 272         TP_PROTO(struct rq *rq, struct task_struct *prev,
 273                  struct task_struct *next),
 274
 275         TP_ARGS(rq, prev, next),
 276 #endif /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) */
 277
 278         TP_FIELDS(
 279                 ctf_array_text(char, prev_comm, prev->comm, TASK_COMM_LEN)
 280                 ctf_integer(pid_t, prev_tid, prev->pid)
 281                 ctf_integer(int, prev_prio, prev->prio - MAX_RT_PRIO)
 282 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,4,0))
 283                 ctf_integer(long, prev_state, __trace_sched_switch_state(preempt, prev))
 284 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
 285                 ctf_integer(long, prev_state, __trace_sched_switch_state(prev))
 286 #else
 287                 ctf_integer(long, prev_state, prev->state)
 288 #endif
 289                 ctf_array_text(char, next_comm, next->comm, TASK_COMM_LEN)
 290                 ctf_integer(pid_t, next_tid, next->pid)
 291                 ctf_integer(int, next_prio, next->prio - MAX_RT_PRIO)
 292         )
 293 )
 294
 295 /*
 296  * Tracepoint for a task being migrated:
 297  */
 298 LTTNG_TRACEPOINT_EVENT(sched_migrate_task,
 299
 300         TP_PROTO(struct task_struct *p, int dest_cpu),
 301
 302         TP_ARGS(p, dest_cpu),
 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                 ctf_integer(int, orig_cpu, task_cpu(p))
 309                 ctf_integer(int, dest_cpu, dest_cpu)
 310         )
 311 )
 312
 313 LTTNG_TRACEPOINT_EVENT_CLASS(sched_process_template,
 314
 315         TP_PROTO(struct task_struct *p),
 316
 317         TP_ARGS(p),
 318
 319         TP_FIELDS(
 320                 ctf_array_text(char, comm, p->comm, TASK_COMM_LEN)
 321                 ctf_integer(pid_t, tid, p->pid)
 322                 ctf_integer(int, prio, p->prio - MAX_RT_PRIO)
 323         )
 324 )
 325
 326 /*
 327  * Tracepoint for freeing a task:
 328  */
 329 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_process_template, sched_process_free,
 330              TP_PROTO(struct task_struct *p),
 331              TP_ARGS(p))
 332
 333
 334 /*
 335  * Tracepoint for a task exiting:
 336  */
 337 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_process_template, sched_process_exit,
 338              TP_PROTO(struct task_struct *p),
 339              TP_ARGS(p))
 340
 341 /*
 342  * Tracepoint for waiting on task to unschedule:
 343  */
 344 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
 345 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_process_template, sched_wait_task,
 346         TP_PROTO(struct task_struct *p),
 347         TP_ARGS(p))
 348 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) */
 349 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_process_template, sched_wait_task,
 350         TP_PROTO(struct rq *rq, struct task_struct *p),
 351         TP_ARGS(rq, p))
 352 #endif /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) */
 353
 354 /*
 355  * Tracepoint for a waiting task:
 356  */
 357 LTTNG_TRACEPOINT_EVENT(sched_process_wait,
 358
 359         TP_PROTO(struct pid *pid),
 360
 361         TP_ARGS(pid),
 362
 363         TP_FIELDS(
 364                 ctf_array_text(char, comm, current->comm, TASK_COMM_LEN)
 365                 ctf_integer(pid_t, tid, pid_nr(pid))
 366                 ctf_integer(int, prio, current->prio - MAX_RT_PRIO)
 367         )
 368 )
 369
 370 /*
 371  * Tracepoint for do_fork.
 372  * Saving both TID and PID information, especially for the child, allows
 373  * trace analyzers to distinguish between creation of a new process and
 374  * creation of a new thread. Newly created processes will have child_tid
 375  * == child_pid, while creation of a thread yields to child_tid !=
 376  * child_pid.
 377  */
 378 LTTNG_TRACEPOINT_EVENT_CODE(sched_process_fork,
 379
 380         TP_PROTO(struct task_struct *parent, struct task_struct *child),
 381
 382         TP_ARGS(parent, child),
 383
 384         TP_locvar(
 385                 pid_t vtids[LTTNG_MAX_PID_NS_LEVEL];
 386                 unsigned int ns_level;
 387         ),
 388
 389         TP_code_pre(
 390                 if (child) {
 391                         struct pid *child_pid;
 392                         unsigned int i;
 393
 394                         child_pid = task_pid(child);
 395                         tp_locvar->ns_level =
 396                                 min_t(unsigned int, child_pid->level + 1,
 397                                         LTTNG_MAX_PID_NS_LEVEL);
 398                         for (i = 0; i < tp_locvar->ns_level; i++)
 399                                 tp_locvar->vtids[i] = child_pid->numbers[i].nr;
 400                 }
 401         ),
 402
 403         TP_FIELDS(
 404                 ctf_array_text(char, parent_comm, parent->comm, TASK_COMM_LEN)
 405                 ctf_integer(pid_t, parent_tid, parent->pid)
 406                 ctf_integer(pid_t, parent_pid, parent->tgid)
 407 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
 408                 ctf_integer(unsigned int, parent_ns_inum,
 409                         ({
 410                                 unsigned int parent_ns_inum = 0;
 411
 412                                 if (parent) {
 413                                         struct pid_namespace *pid_ns;
 414
 415                                         pid_ns = task_active_pid_ns(parent);
 416                                         if (pid_ns)
 417                                                 parent_ns_inum =
 418                                                         pid_ns->lttng_proc_inum;
 419                                 }
 420                                 parent_ns_inum;
 421                         }))
 422 #endif
 423                 ctf_array_text(char, child_comm, child->comm, TASK_COMM_LEN)
 424                 ctf_integer(pid_t, child_tid, child->pid)
 425                 ctf_sequence(pid_t, vtids, tp_locvar->vtids, u8, tp_locvar->ns_level)
 426                 ctf_integer(pid_t, child_pid, child->tgid)
 427 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
 428                 ctf_integer(unsigned int, child_ns_inum,
 429                         ({
 430                                 unsigned int child_ns_inum = 0;
 431
 432                                 if (child) {
 433                                         struct pid_namespace *pid_ns;
 434
 435                                         pid_ns = task_active_pid_ns(child);
 436                                         if (pid_ns)
 437                                                 child_ns_inum =
 438                                                         pid_ns->lttng_proc_inum;
 439                                 }
 440                                 child_ns_inum;
 441                         }))
 442 #endif
 443         ),
 444
 445         TP_code_post()
 446 )
 447
 448 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,33))
 449 /*
 450  * Tracepoint for sending a signal:
 451  */
 452 LTTNG_TRACEPOINT_EVENT(sched_signal_send,
 453
 454         TP_PROTO(int sig, struct task_struct *p),
 455
 456         TP_ARGS(sig, p),
 457
 458         TP_FIELDS(
 459                 ctf_integer(int, sig, sig)
 460                 ctf_array_text(char, comm, p->comm, TASK_COMM_LEN)
 461                 ctf_integer(pid_t, tid, p->pid)
 462         )
 463 )
 464 #endif
 465
 466 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
 467 /*
 468  * Tracepoint for exec:
 469  */
 470 LTTNG_TRACEPOINT_EVENT(sched_process_exec,
 471
 472         TP_PROTO(struct task_struct *p, pid_t old_pid,
 473                  struct linux_binprm *bprm),
 474
 475         TP_ARGS(p, old_pid, bprm),
 476
 477         TP_FIELDS(
 478                 ctf_string(filename, bprm->filename)
 479                 ctf_integer(pid_t, tid, p->pid)
 480                 ctf_integer(pid_t, old_tid, old_pid)
 481         )
 482 )
 483 #endif
 484
 485 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32))
 486 /*
 487  * XXX the below sched_stat tracepoints only apply to SCHED_OTHER/BATCH/IDLE
 488  *     adding sched_stat support to SCHED_FIFO/RR would be welcome.
 489  */
 490 LTTNG_TRACEPOINT_EVENT_CLASS(sched_stat_template,
 491
 492         TP_PROTO(struct task_struct *tsk, u64 delay),
 493
 494         TP_ARGS(tsk, delay),
 495
 496         TP_FIELDS(
 497                 ctf_array_text(char, comm, tsk->comm, TASK_COMM_LEN)
 498                 ctf_integer(pid_t, tid, tsk->pid)
 499                 ctf_integer(u64, delay, delay)
 500         )
 501 )
 502
 503
 504 /*
 505  * Tracepoint for accounting wait time (time the task is runnable
 506  * but not actually running due to scheduler contention).
 507  */
 508 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_stat_template, sched_stat_wait,
 509              TP_PROTO(struct task_struct *tsk, u64 delay),
 510              TP_ARGS(tsk, delay))
 511
 512 /*
 513  * Tracepoint for accounting sleep time (time the task is not runnable,
 514  * including iowait, see below).
 515  */
 516 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_stat_template, sched_stat_sleep,
 517              TP_PROTO(struct task_struct *tsk, u64 delay),
 518              TP_ARGS(tsk, delay))
 519
 520 /*
 521  * Tracepoint for accounting iowait time (time the task is not runnable
 522  * due to waiting on IO to complete).
 523  */
 524 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_stat_template, sched_stat_iowait,
 525              TP_PROTO(struct task_struct *tsk, u64 delay),
 526              TP_ARGS(tsk, delay))
 527
 528 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 529 /*
 530  * Tracepoint for accounting blocked time (time the task is in uninterruptible).
 531  */
 532 LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_stat_template, sched_stat_blocked,
 533              TP_PROTO(struct task_struct *tsk, u64 delay),
 534              TP_ARGS(tsk, delay))
 535 #endif
 536
 537 /*
 538  * Tracepoint for accounting runtime (time the task is executing
 539  * on a CPU).
 540  */
 541 LTTNG_TRACEPOINT_EVENT(sched_stat_runtime,
 542
 543         TP_PROTO(struct task_struct *tsk, u64 runtime, u64 vruntime),
 544
 545         TP_ARGS(tsk, runtime, vruntime),
 546
 547         TP_FIELDS(
 548                 ctf_array_text(char, comm, tsk->comm, TASK_COMM_LEN)
 549                 ctf_integer(pid_t, tid, tsk->pid)
 550                 ctf_integer(u64, runtime, runtime)
 551                 ctf_integer(u64, vruntime, vruntime)
 552         )
 553 )
 554 #endif
 555
 556 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,12,0) || \
 557         LTTNG_RT_KERNEL_RANGE(4,9,27,18, 4,10,0,0) || \
 558         LTTNG_RT_KERNEL_RANGE(4,11,5,1, 4,12,0,0))
 559 /*
 560  * Tracepoint for showing priority inheritance modifying a tasks
 561  * priority.
 562  */
 563 LTTNG_TRACEPOINT_EVENT(sched_pi_setprio,
 564
 565         TP_PROTO(struct task_struct *tsk, struct task_struct *pi_task),
 566
 567         TP_ARGS(tsk, pi_task),
 568
 569         TP_FIELDS(
 570                 ctf_array_text(char, comm, tsk->comm, TASK_COMM_LEN)
 571                 ctf_integer(pid_t, tid, tsk->pid)
 572                 ctf_integer(int, oldprio, tsk->prio - MAX_RT_PRIO)
 573                 ctf_integer(int, newprio, pi_task ? pi_task->prio - MAX_RT_PRIO : tsk->prio - MAX_RT_PRIO)
 574         )
 575 )
 576 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37))
 577 /*
 578  * Tracepoint for showing priority inheritance modifying a tasks
 579  * priority.
 580  */
 581 LTTNG_TRACEPOINT_EVENT(sched_pi_setprio,
 582
 583         TP_PROTO(struct task_struct *tsk, int newprio),
 584
 585         TP_ARGS(tsk, newprio),
 586
 587         TP_FIELDS(
 588                 ctf_array_text(char, comm, tsk->comm, TASK_COMM_LEN)
 589                 ctf_integer(pid_t, tid, tsk->pid)
 590                 ctf_integer(int, oldprio, tsk->prio - MAX_RT_PRIO)
 591                 ctf_integer(int, newprio, newprio - MAX_RT_PRIO)
 592         )
 593 )
 594 #endif
 595
 596 #endif /* LTTNG_TRACE_SCHED_H */
 597
 598 /* This part must be outside protection */
 599 #include <probes/define_trace.h>