1 #undef TRACE_SYSTEM 2 #define TRACE_SYSTEM rcu 3 4 #if !defined(_TRACE_RCU_H) || defined(TRACE_HEADER_MULTI_READ) 5 #define _TRACE_RCU_H 6 7 #include <linux/tracepoint.h> 8 9 /* 10 * Tracepoint for start/end markers used for utilization calculations. 11 * By convention, the string is of the following forms: 12 * 13 * "Start <activity>" -- Mark the start of the specified activity, 14 * such as "context switch". Nesting is permitted. 15 * "End <activity>" -- Mark the end of the specified activity. 16 * 17 * An "@" character within "<activity>" is a comment character: Data 18 * reduction scripts will ignore the "@" and the remainder of the line. 19 */ 20 TRACE_EVENT(rcu_utilization, 21 22 TP_PROTO(const char *s), 23 24 TP_ARGS(s), 25 26 TP_STRUCT__entry( 27 __field(const char *, s) 28 ), 29 30 TP_fast_assign( 31 __entry->s = s; 32 ), 33 34 TP_printk("%s", __entry->s) 35 ); 36 37 #ifdef CONFIG_RCU_TRACE 38 39 #if defined(CONFIG_TREE_RCU) || defined(CONFIG_TREE_PREEMPT_RCU) 40 41 /* 42 * Tracepoint for grace-period events. Takes a string identifying the 43 * RCU flavor, the grace-period number, and a string identifying the 44 * grace-period-related event as follows: 45 * 46 * "AccReadyCB": CPU acclerates new callbacks to RCU_NEXT_READY_TAIL. 47 * "AccWaitCB": CPU accelerates new callbacks to RCU_WAIT_TAIL. 48 * "newreq": Request a new grace period. 49 * "start": Start a grace period. 50 * "cpustart": CPU first notices a grace-period start. 51 * "cpuqs": CPU passes through a quiescent state. 52 * "cpuonl": CPU comes online. 53 * "cpuofl": CPU goes offline. 54 * "reqwait": GP kthread sleeps waiting for grace-period request. 55 * "reqwaitsig": GP kthread awakened by signal from reqwait state. 56 * "fqswait": GP kthread waiting until time to force quiescent states. 57 * "fqsstart": GP kthread starts forcing quiescent states. 58 * "fqsend": GP kthread done forcing quiescent states. 59 * "fqswaitsig": GP kthread awakened by signal from fqswait state. 60 * "end": End a grace period. 61 * "cpuend": CPU first notices a grace-period end. 62 */ 63 TRACE_EVENT(rcu_grace_period, 64 65 TP_PROTO(const char *rcuname, unsigned long gpnum, const char *gpevent), 66 67 TP_ARGS(rcuname, gpnum, gpevent), 68 69 TP_STRUCT__entry( 70 __field(const char *, rcuname) 71 __field(unsigned long, gpnum) 72 __field(const char *, gpevent) 73 ), 74 75 TP_fast_assign( 76 __entry->rcuname = rcuname; 77 __entry->gpnum = gpnum; 78 __entry->gpevent = gpevent; 79 ), 80 81 TP_printk("%s %lu %s", 82 __entry->rcuname, __entry->gpnum, __entry->gpevent) 83 ); 84 85 /* 86 * Tracepoint for future grace-period events, including those for no-callbacks 87 * CPUs. The caller should pull the data from the rcu_node structure, 88 * other than rcuname, which comes from the rcu_state structure, and event, 89 * which is one of the following: 90 * 91 * "Startleaf": Request a nocb grace period based on leaf-node data. 92 * "Startedleaf": Leaf-node start proved sufficient. 93 * "Startedleafroot": Leaf-node start proved sufficient after checking root. 94 * "Startedroot": Requested a nocb grace period based on root-node data. 95 * "StartWait": Start waiting for the requested grace period. 96 * "ResumeWait": Resume waiting after signal. 97 * "EndWait": Complete wait. 98 * "Cleanup": Clean up rcu_node structure after previous GP. 99 * "CleanupMore": Clean up, and another no-CB GP is needed. 100 */ 101 TRACE_EVENT(rcu_future_grace_period, 102 103 TP_PROTO(const char *rcuname, unsigned long gpnum, unsigned long completed, 104 unsigned long c, u8 level, int grplo, int grphi, 105 const char *gpevent), 106 107 TP_ARGS(rcuname, gpnum, completed, c, level, grplo, grphi, gpevent), 108 109 TP_STRUCT__entry( 110 __field(const char *, rcuname) 111 __field(unsigned long, gpnum) 112 __field(unsigned long, completed) 113 __field(unsigned long, c) 114 __field(u8, level) 115 __field(int, grplo) 116 __field(int, grphi) 117 __field(const char *, gpevent) 118 ), 119 120 TP_fast_assign( 121 __entry->rcuname = rcuname; 122 __entry->gpnum = gpnum; 123 __entry->completed = completed; 124 __entry->c = c; 125 __entry->level = level; 126 __entry->grplo = grplo; 127 __entry->grphi = grphi; 128 __entry->gpevent = gpevent; 129 ), 130 131 TP_printk("%s %lu %lu %lu %u %d %d %s", 132 __entry->rcuname, __entry->gpnum, __entry->completed, 133 __entry->c, __entry->level, __entry->grplo, __entry->grphi, 134 __entry->gpevent) 135 ); 136 137 /* 138 * Tracepoint for grace-period-initialization events. These are 139 * distinguished by the type of RCU, the new grace-period number, the 140 * rcu_node structure level, the starting and ending CPU covered by the 141 * rcu_node structure, and the mask of CPUs that will be waited for. 142 * All but the type of RCU are extracted from the rcu_node structure. 143 */ 144 TRACE_EVENT(rcu_grace_period_init, 145 146 TP_PROTO(const char *rcuname, unsigned long gpnum, u8 level, 147 int grplo, int grphi, unsigned long qsmask), 148 149 TP_ARGS(rcuname, gpnum, level, grplo, grphi, qsmask), 150 151 TP_STRUCT__entry( 152 __field(const char *, rcuname) 153 __field(unsigned long, gpnum) 154 __field(u8, level) 155 __field(int, grplo) 156 __field(int, grphi) 157 __field(unsigned long, qsmask) 158 ), 159 160 TP_fast_assign( 161 __entry->rcuname = rcuname; 162 __entry->gpnum = gpnum; 163 __entry->level = level; 164 __entry->grplo = grplo; 165 __entry->grphi = grphi; 166 __entry->qsmask = qsmask; 167 ), 168 169 TP_printk("%s %lu %u %d %d %lx", 170 __entry->rcuname, __entry->gpnum, __entry->level, 171 __entry->grplo, __entry->grphi, __entry->qsmask) 172 ); 173 174 /* 175 * Tracepoint for RCU no-CBs CPU callback handoffs. This event is intended 176 * to assist debugging of these handoffs. 177 * 178 * The first argument is the name of the RCU flavor, and the second is 179 * the number of the offloaded CPU are extracted. The third and final 180 * argument is a string as follows: 181 * 182 * "WakeEmpty": Wake rcuo kthread, first CB to empty list. 183 * "WakeOvf": Wake rcuo kthread, CB list is huge. 184 * "WakeNot": Don't wake rcuo kthread. 185 * "WakeNotPoll": Don't wake rcuo kthread because it is polling. 186 * "Poll": Start of new polling cycle for rcu_nocb_poll. 187 * "Sleep": Sleep waiting for CBs for !rcu_nocb_poll. 188 * "WokeEmpty": rcuo kthread woke to find empty list. 189 * "WokeNonEmpty": rcuo kthread woke to find non-empty list. 190 * "WaitQueue": Enqueue partially done, timed wait for it to complete. 191 * "WokeQueue": Partial enqueue now complete. 192 */ 193 TRACE_EVENT(rcu_nocb_wake, 194 195 TP_PROTO(const char *rcuname, int cpu, const char *reason), 196 197 TP_ARGS(rcuname, cpu, reason), 198 199 TP_STRUCT__entry( 200 __field(const char *, rcuname) 201 __field(int, cpu) 202 __field(const char *, reason) 203 ), 204 205 TP_fast_assign( 206 __entry->rcuname = rcuname; 207 __entry->cpu = cpu; 208 __entry->reason = reason; 209 ), 210 211 TP_printk("%s %d %s", __entry->rcuname, __entry->cpu, __entry->reason) 212 ); 213 214 /* 215 * Tracepoint for tasks blocking within preemptible-RCU read-side 216 * critical sections. Track the type of RCU (which one day might 217 * include SRCU), the grace-period number that the task is blocking 218 * (the current or the next), and the task's PID. 219 */ 220 TRACE_EVENT(rcu_preempt_task, 221 222 TP_PROTO(const char *rcuname, int pid, unsigned long gpnum), 223 224 TP_ARGS(rcuname, pid, gpnum), 225 226 TP_STRUCT__entry( 227 __field(const char *, rcuname) 228 __field(unsigned long, gpnum) 229 __field(int, pid) 230 ), 231 232 TP_fast_assign( 233 __entry->rcuname = rcuname; 234 __entry->gpnum = gpnum; 235 __entry->pid = pid; 236 ), 237 238 TP_printk("%s %lu %d", 239 __entry->rcuname, __entry->gpnum, __entry->pid) 240 ); 241 242 /* 243 * Tracepoint for tasks that blocked within a given preemptible-RCU 244 * read-side critical section exiting that critical section. Track the 245 * type of RCU (which one day might include SRCU) and the task's PID. 246 */ 247 TRACE_EVENT(rcu_unlock_preempted_task, 248 249 TP_PROTO(const char *rcuname, unsigned long gpnum, int pid), 250 251 TP_ARGS(rcuname, gpnum, pid), 252 253 TP_STRUCT__entry( 254 __field(const char *, rcuname) 255 __field(unsigned long, gpnum) 256 __field(int, pid) 257 ), 258 259 TP_fast_assign( 260 __entry->rcuname = rcuname; 261 __entry->gpnum = gpnum; 262 __entry->pid = pid; 263 ), 264 265 TP_printk("%s %lu %d", __entry->rcuname, __entry->gpnum, __entry->pid) 266 ); 267 268 /* 269 * Tracepoint for quiescent-state-reporting events. These are 270 * distinguished by the type of RCU, the grace-period number, the 271 * mask of quiescent lower-level entities, the rcu_node structure level, 272 * the starting and ending CPU covered by the rcu_node structure, and 273 * whether there are any blocked tasks blocking the current grace period. 274 * All but the type of RCU are extracted from the rcu_node structure. 275 */ 276 TRACE_EVENT(rcu_quiescent_state_report, 277 278 TP_PROTO(const char *rcuname, unsigned long gpnum, 279 unsigned long mask, unsigned long qsmask, 280 u8 level, int grplo, int grphi, int gp_tasks), 281 282 TP_ARGS(rcuname, gpnum, mask, qsmask, level, grplo, grphi, gp_tasks), 283 284 TP_STRUCT__entry( 285 __field(const char *, rcuname) 286 __field(unsigned long, gpnum) 287 __field(unsigned long, mask) 288 __field(unsigned long, qsmask) 289 __field(u8, level) 290 __field(int, grplo) 291 __field(int, grphi) 292 __field(u8, gp_tasks) 293 ), 294 295 TP_fast_assign( 296 __entry->rcuname = rcuname; 297 __entry->gpnum = gpnum; 298 __entry->mask = mask; 299 __entry->qsmask = qsmask; 300 __entry->level = level; 301 __entry->grplo = grplo; 302 __entry->grphi = grphi; 303 __entry->gp_tasks = gp_tasks; 304 ), 305 306 TP_printk("%s %lu %lx>%lx %u %d %d %u", 307 __entry->rcuname, __entry->gpnum, 308 __entry->mask, __entry->qsmask, __entry->level, 309 __entry->grplo, __entry->grphi, __entry->gp_tasks) 310 ); 311 312 /* 313 * Tracepoint for quiescent states detected by force_quiescent_state(). 314 * These trace events include the type of RCU, the grace-period number 315 * that was blocked by the CPU, the CPU itself, and the type of quiescent 316 * state, which can be "dti" for dyntick-idle mode, "ofl" for CPU offline, 317 * or "kick" when kicking a CPU that has been in dyntick-idle mode for 318 * too long. 319 */ 320 TRACE_EVENT(rcu_fqs, 321 322 TP_PROTO(const char *rcuname, unsigned long gpnum, int cpu, const char *qsevent), 323 324 TP_ARGS(rcuname, gpnum, cpu, qsevent), 325 326 TP_STRUCT__entry( 327 __field(const char *, rcuname) 328 __field(unsigned long, gpnum) 329 __field(int, cpu) 330 __field(const char *, qsevent) 331 ), 332 333 TP_fast_assign( 334 __entry->rcuname = rcuname; 335 __entry->gpnum = gpnum; 336 __entry->cpu = cpu; 337 __entry->qsevent = qsevent; 338 ), 339 340 TP_printk("%s %lu %d %s", 341 __entry->rcuname, __entry->gpnum, 342 __entry->cpu, __entry->qsevent) 343 ); 344 345 #endif /* #if defined(CONFIG_TREE_RCU) || defined(CONFIG_TREE_PREEMPT_RCU) */ 346 347 /* 348 * Tracepoint for dyntick-idle entry/exit events. These take a string 349 * as argument: "Start" for entering dyntick-idle mode, "End" for 350 * leaving it, "--=" for events moving towards idle, and "++=" for events 351 * moving away from idle. "Error on entry: not idle task" and "Error on 352 * exit: not idle task" indicate that a non-idle task is erroneously 353 * toying with the idle loop. 354 * 355 * These events also take a pair of numbers, which indicate the nesting 356 * depth before and after the event of interest. Note that task-related 357 * events use the upper bits of each number, while interrupt-related 358 * events use the lower bits. 359 */ 360 TRACE_EVENT(rcu_dyntick, 361 362 TP_PROTO(const char *polarity, long long oldnesting, long long newnesting), 363 364 TP_ARGS(polarity, oldnesting, newnesting), 365 366 TP_STRUCT__entry( 367 __field(const char *, polarity) 368 __field(long long, oldnesting) 369 __field(long long, newnesting) 370 ), 371 372 TP_fast_assign( 373 __entry->polarity = polarity; 374 __entry->oldnesting = oldnesting; 375 __entry->newnesting = newnesting; 376 ), 377 378 TP_printk("%s %llx %llx", __entry->polarity, 379 __entry->oldnesting, __entry->newnesting) 380 ); 381 382 /* 383 * Tracepoint for RCU preparation for idle, the goal being to get RCU 384 * processing done so that the current CPU can shut off its scheduling 385 * clock and enter dyntick-idle mode. One way to accomplish this is 386 * to drain all RCU callbacks from this CPU, and the other is to have 387 * done everything RCU requires for the current grace period. In this 388 * latter case, the CPU will be awakened at the end of the current grace 389 * period in order to process the remainder of its callbacks. 390 * 391 * These tracepoints take a string as argument: 392 * 393 * "No callbacks": Nothing to do, no callbacks on this CPU. 394 * "In holdoff": Nothing to do, holding off after unsuccessful attempt. 395 * "Begin holdoff": Attempt failed, don't retry until next jiffy. 396 * "Dyntick with callbacks": Entering dyntick-idle despite callbacks. 397 * "Dyntick with lazy callbacks": Entering dyntick-idle w/lazy callbacks. 398 * "More callbacks": Still more callbacks, try again to clear them out. 399 * "Callbacks drained": All callbacks processed, off to dyntick idle! 400 * "Timer": Timer fired to cause CPU to continue processing callbacks. 401 * "Demigrate": Timer fired on wrong CPU, woke up correct CPU. 402 * "Cleanup after idle": Idle exited, timer canceled. 403 */ 404 TRACE_EVENT(rcu_prep_idle, 405 406 TP_PROTO(const char *reason), 407 408 TP_ARGS(reason), 409 410 TP_STRUCT__entry( 411 __field(const char *, reason) 412 ), 413 414 TP_fast_assign( 415 __entry->reason = reason; 416 ), 417 418 TP_printk("%s", __entry->reason) 419 ); 420 421 /* 422 * Tracepoint for the registration of a single RCU callback function. 423 * The first argument is the type of RCU, the second argument is 424 * a pointer to the RCU callback itself, the third element is the 425 * number of lazy callbacks queued, and the fourth element is the 426 * total number of callbacks queued. 427 */ 428 TRACE_EVENT(rcu_callback, 429 430 TP_PROTO(const char *rcuname, struct rcu_head *rhp, long qlen_lazy, 431 long qlen), 432 433 TP_ARGS(rcuname, rhp, qlen_lazy, qlen), 434 435 TP_STRUCT__entry( 436 __field(const char *, rcuname) 437 __field(void *, rhp) 438 __field(void *, func) 439 __field(long, qlen_lazy) 440 __field(long, qlen) 441 ), 442 443 TP_fast_assign( 444 __entry->rcuname = rcuname; 445 __entry->rhp = rhp; 446 __entry->func = rhp->func; 447 __entry->qlen_lazy = qlen_lazy; 448 __entry->qlen = qlen; 449 ), 450 451 TP_printk("%s rhp=%p func=%pf %ld/%ld", 452 __entry->rcuname, __entry->rhp, __entry->func, 453 __entry->qlen_lazy, __entry->qlen) 454 ); 455 456 /* 457 * Tracepoint for the registration of a single RCU callback of the special 458 * kfree() form. The first argument is the RCU type, the second argument 459 * is a pointer to the RCU callback, the third argument is the offset 460 * of the callback within the enclosing RCU-protected data structure, 461 * the fourth argument is the number of lazy callbacks queued, and the 462 * fifth argument is the total number of callbacks queued. 463 */ 464 TRACE_EVENT(rcu_kfree_callback, 465 466 TP_PROTO(const char *rcuname, struct rcu_head *rhp, unsigned long offset, 467 long qlen_lazy, long qlen), 468 469 TP_ARGS(rcuname, rhp, offset, qlen_lazy, qlen), 470 471 TP_STRUCT__entry( 472 __field(const char *, rcuname) 473 __field(void *, rhp) 474 __field(unsigned long, offset) 475 __field(long, qlen_lazy) 476 __field(long, qlen) 477 ), 478 479 TP_fast_assign( 480 __entry->rcuname = rcuname; 481 __entry->rhp = rhp; 482 __entry->offset = offset; 483 __entry->qlen_lazy = qlen_lazy; 484 __entry->qlen = qlen; 485 ), 486 487 TP_printk("%s rhp=%p func=%ld %ld/%ld", 488 __entry->rcuname, __entry->rhp, __entry->offset, 489 __entry->qlen_lazy, __entry->qlen) 490 ); 491 492 /* 493 * Tracepoint for marking the beginning rcu_do_batch, performed to start 494 * RCU callback invocation. The first argument is the RCU flavor, 495 * the second is the number of lazy callbacks queued, the third is 496 * the total number of callbacks queued, and the fourth argument is 497 * the current RCU-callback batch limit. 498 */ 499 TRACE_EVENT(rcu_batch_start, 500 501 TP_PROTO(const char *rcuname, long qlen_lazy, long qlen, long blimit), 502 503 TP_ARGS(rcuname, qlen_lazy, qlen, blimit), 504 505 TP_STRUCT__entry( 506 __field(const char *, rcuname) 507 __field(long, qlen_lazy) 508 __field(long, qlen) 509 __field(long, blimit) 510 ), 511 512 TP_fast_assign( 513 __entry->rcuname = rcuname; 514 __entry->qlen_lazy = qlen_lazy; 515 __entry->qlen = qlen; 516 __entry->blimit = blimit; 517 ), 518 519 TP_printk("%s CBs=%ld/%ld bl=%ld", 520 __entry->rcuname, __entry->qlen_lazy, __entry->qlen, 521 __entry->blimit) 522 ); 523 524 /* 525 * Tracepoint for the invocation of a single RCU callback function. 526 * The first argument is the type of RCU, and the second argument is 527 * a pointer to the RCU callback itself. 528 */ 529 TRACE_EVENT(rcu_invoke_callback, 530 531 TP_PROTO(const char *rcuname, struct rcu_head *rhp), 532 533 TP_ARGS(rcuname, rhp), 534 535 TP_STRUCT__entry( 536 __field(const char *, rcuname) 537 __field(void *, rhp) 538 __field(void *, func) 539 ), 540 541 TP_fast_assign( 542 __entry->rcuname = rcuname; 543 __entry->rhp = rhp; 544 __entry->func = rhp->func; 545 ), 546 547 TP_printk("%s rhp=%p func=%pf", 548 __entry->rcuname, __entry->rhp, __entry->func) 549 ); 550 551 /* 552 * Tracepoint for the invocation of a single RCU callback of the special 553 * kfree() form. The first argument is the RCU flavor, the second 554 * argument is a pointer to the RCU callback, and the third argument 555 * is the offset of the callback within the enclosing RCU-protected 556 * data structure. 557 */ 558 TRACE_EVENT(rcu_invoke_kfree_callback, 559 560 TP_PROTO(const char *rcuname, struct rcu_head *rhp, unsigned long offset), 561 562 TP_ARGS(rcuname, rhp, offset), 563 564 TP_STRUCT__entry( 565 __field(const char *, rcuname) 566 __field(void *, rhp) 567 __field(unsigned long, offset) 568 ), 569 570 TP_fast_assign( 571 __entry->rcuname = rcuname; 572 __entry->rhp = rhp; 573 __entry->offset = offset; 574 ), 575 576 TP_printk("%s rhp=%p func=%ld", 577 __entry->rcuname, __entry->rhp, __entry->offset) 578 ); 579 580 /* 581 * Tracepoint for exiting rcu_do_batch after RCU callbacks have been 582 * invoked. The first argument is the name of the RCU flavor, 583 * the second argument is number of callbacks actually invoked, 584 * the third argument (cb) is whether or not any of the callbacks that 585 * were ready to invoke at the beginning of this batch are still 586 * queued, the fourth argument (nr) is the return value of need_resched(), 587 * the fifth argument (iit) is 1 if the current task is the idle task, 588 * and the sixth argument (risk) is the return value from 589 * rcu_is_callbacks_kthread(). 590 */ 591 TRACE_EVENT(rcu_batch_end, 592 593 TP_PROTO(const char *rcuname, int callbacks_invoked, 594 char cb, char nr, char iit, char risk), 595 596 TP_ARGS(rcuname, callbacks_invoked, cb, nr, iit, risk), 597 598 TP_STRUCT__entry( 599 __field(const char *, rcuname) 600 __field(int, callbacks_invoked) 601 __field(char, cb) 602 __field(char, nr) 603 __field(char, iit) 604 __field(char, risk) 605 ), 606 607 TP_fast_assign( 608 __entry->rcuname = rcuname; 609 __entry->callbacks_invoked = callbacks_invoked; 610 __entry->cb = cb; 611 __entry->nr = nr; 612 __entry->iit = iit; 613 __entry->risk = risk; 614 ), 615 616 TP_printk("%s CBs-invoked=%d idle=%c%c%c%c", 617 __entry->rcuname, __entry->callbacks_invoked, 618 __entry->cb ? 'C' : '.', 619 __entry->nr ? 'S' : '.', 620 __entry->iit ? 'I' : '.', 621 __entry->risk ? 'R' : '.') 622 ); 623 624 /* 625 * Tracepoint for rcutorture readers. The first argument is the name 626 * of the RCU flavor from rcutorture's viewpoint and the second argument 627 * is the callback address. 628 */ 629 TRACE_EVENT(rcu_torture_read, 630 631 TP_PROTO(const char *rcutorturename, struct rcu_head *rhp, 632 unsigned long secs, unsigned long c_old, unsigned long c), 633 634 TP_ARGS(rcutorturename, rhp, secs, c_old, c), 635 636 TP_STRUCT__entry( 637 __field(const char *, rcutorturename) 638 __field(struct rcu_head *, rhp) 639 __field(unsigned long, secs) 640 __field(unsigned long, c_old) 641 __field(unsigned long, c) 642 ), 643 644 TP_fast_assign( 645 __entry->rcutorturename = rcutorturename; 646 __entry->rhp = rhp; 647 __entry->secs = secs; 648 __entry->c_old = c_old; 649 __entry->c = c; 650 ), 651 652 TP_printk("%s torture read %p %luus c: %lu %lu", 653 __entry->rcutorturename, __entry->rhp, 654 __entry->secs, __entry->c_old, __entry->c) 655 ); 656 657 /* 658 * Tracepoint for _rcu_barrier() execution. The string "s" describes 659 * the _rcu_barrier phase: 660 * "Begin": rcu_barrier_callback() started. 661 * "Check": rcu_barrier_callback() checking for piggybacking. 662 * "EarlyExit": rcu_barrier_callback() piggybacked, thus early exit. 663 * "Inc1": rcu_barrier_callback() piggyback check counter incremented. 664 * "Offline": rcu_barrier_callback() found offline CPU 665 * "OnlineNoCB": rcu_barrier_callback() found online no-CBs CPU. 666 * "OnlineQ": rcu_barrier_callback() found online CPU with callbacks. 667 * "OnlineNQ": rcu_barrier_callback() found online CPU, no callbacks. 668 * "IRQ": An rcu_barrier_callback() callback posted on remote CPU. 669 * "CB": An rcu_barrier_callback() invoked a callback, not the last. 670 * "LastCB": An rcu_barrier_callback() invoked the last callback. 671 * "Inc2": rcu_barrier_callback() piggyback check counter incremented. 672 * The "cpu" argument is the CPU or -1 if meaningless, the "cnt" argument 673 * is the count of remaining callbacks, and "done" is the piggybacking count. 674 */ 675 TRACE_EVENT(rcu_barrier, 676 677 TP_PROTO(const char *rcuname, const char *s, int cpu, int cnt, unsigned long done), 678 679 TP_ARGS(rcuname, s, cpu, cnt, done), 680 681 TP_STRUCT__entry( 682 __field(const char *, rcuname) 683 __field(const char *, s) 684 __field(int, cpu) 685 __field(int, cnt) 686 __field(unsigned long, done) 687 ), 688 689 TP_fast_assign( 690 __entry->rcuname = rcuname; 691 __entry->s = s; 692 __entry->cpu = cpu; 693 __entry->cnt = cnt; 694 __entry->done = done; 695 ), 696 697 TP_printk("%s %s cpu %d remaining %d # %lu", 698 __entry->rcuname, __entry->s, __entry->cpu, __entry->cnt, 699 __entry->done) 700 ); 701 702 #else /* #ifdef CONFIG_RCU_TRACE */ 703 704 #define trace_rcu_grace_period(rcuname, gpnum, gpevent) do { } while (0) 705 #define trace_rcu_grace_period_init(rcuname, gpnum, level, grplo, grphi, \ 706 qsmask) do { } while (0) 707 #define trace_rcu_future_grace_period(rcuname, gpnum, completed, c, \ 708 level, grplo, grphi, event) \ 709 do { } while (0) 710 #define trace_rcu_nocb_wake(rcuname, cpu, reason) do { } while (0) 711 #define trace_rcu_preempt_task(rcuname, pid, gpnum) do { } while (0) 712 #define trace_rcu_unlock_preempted_task(rcuname, gpnum, pid) do { } while (0) 713 #define trace_rcu_quiescent_state_report(rcuname, gpnum, mask, qsmask, level, \ 714 grplo, grphi, gp_tasks) do { } \ 715 while (0) 716 #define trace_rcu_fqs(rcuname, gpnum, cpu, qsevent) do { } while (0) 717 #define trace_rcu_dyntick(polarity, oldnesting, newnesting) do { } while (0) 718 #define trace_rcu_prep_idle(reason) do { } while (0) 719 #define trace_rcu_callback(rcuname, rhp, qlen_lazy, qlen) do { } while (0) 720 #define trace_rcu_kfree_callback(rcuname, rhp, offset, qlen_lazy, qlen) \ 721 do { } while (0) 722 #define trace_rcu_batch_start(rcuname, qlen_lazy, qlen, blimit) \ 723 do { } while (0) 724 #define trace_rcu_invoke_callback(rcuname, rhp) do { } while (0) 725 #define trace_rcu_invoke_kfree_callback(rcuname, rhp, offset) do { } while (0) 726 #define trace_rcu_batch_end(rcuname, callbacks_invoked, cb, nr, iit, risk) \ 727 do { } while (0) 728 #define trace_rcu_torture_read(rcutorturename, rhp, secs, c_old, c) \ 729 do { } while (0) 730 #define trace_rcu_barrier(name, s, cpu, cnt, done) do { } while (0) 731 732 #endif /* #else #ifdef CONFIG_RCU_TRACE */ 733 734 #endif /* _TRACE_RCU_H */ 735 736 /* This part must be outside protection */ 737 #include <trace/define_trace.h> 738