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