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| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
|---|---|
| 2 | #undef TRACE_SYSTEM |
| 3 | #define TRACE_SYSTEM rcu |
| 4 | |
| 5 | #if !defined(_TRACE_RCU_H) || defined(TRACE_HEADER_MULTI_READ) |
| 6 | #define _TRACE_RCU_H |
| 7 | |
| 8 | #include <linux/tracepoint.h> |
| 9 | |
| 10 | #ifdef CONFIG_RCU_TRACE |
| 11 | #define TRACE_EVENT_RCU TRACE_EVENT |
| 12 | #else |
| 13 | #define TRACE_EVENT_RCU TRACE_EVENT_NOP |
| 14 | #endif |
| 15 | |
| 16 | /* |
| 17 | * Tracepoint for start/end markers used for utilization calculations. |
| 18 | * By convention, the string is of the following forms: |
| 19 | * |
| 20 | * "Start <activity>" -- Mark the start of the specified activity, |
| 21 | * such as "context switch". Nesting is permitted. |
| 22 | * "End <activity>" -- Mark the end of the specified activity. |
| 23 | * |
| 24 | * An "@" character within "<activity>" is a comment character: Data |
| 25 | * reduction scripts will ignore the "@" and the remainder of the line. |
| 26 | */ |
| 27 | TRACE_EVENT(rcu_utilization, |
| 28 | |
| 29 | TP_PROTO(const char *s), |
| 30 | |
| 31 | TP_ARGS(s), |
| 32 | |
| 33 | TP_STRUCT__entry( |
| 34 | __field(const char *, s) |
| 35 | ), |
| 36 | |
| 37 | TP_fast_assign( |
| 38 | __entry->s = s; |
| 39 | ), |
| 40 | |
| 41 | TP_printk("%s", __entry->s) |
| 42 | ); |
| 43 | |
| 44 | #if defined(CONFIG_TREE_RCU) |
| 45 | |
| 46 | /* |
| 47 | * Tracepoint for grace-period events. Takes a string identifying the |
| 48 | * RCU flavor, the grace-period number, and a string identifying the |
| 49 | * grace-period-related event as follows: |
| 50 | * |
| 51 | * "AccReadyCB": CPU accelerates new callbacks to RCU_NEXT_READY_TAIL. |
| 52 | * "AccWaitCB": CPU accelerates new callbacks to RCU_WAIT_TAIL. |
| 53 | * "newreq": Request a new grace period. |
| 54 | * "start": Start a grace period. |
| 55 | * "cpustart": CPU first notices a grace-period start. |
| 56 | * "cpuqs": CPU passes through a quiescent state. |
| 57 | * "cpuonl": CPU comes online. |
| 58 | * "cpuofl": CPU goes offline. |
| 59 | * "cpuofl-bgp": CPU goes offline while blocking a grace period. |
| 60 | * "reqwait": GP kthread sleeps waiting for grace-period request. |
| 61 | * "reqwaitsig": GP kthread awakened by signal from reqwait state. |
| 62 | * "fqswait": GP kthread waiting until time to force quiescent states. |
| 63 | * "fqsstart": GP kthread starts forcing quiescent states. |
| 64 | * "fqsend": GP kthread done forcing quiescent states. |
| 65 | * "fqswaitsig": GP kthread awakened by signal from fqswait state. |
| 66 | * "end": End a grace period. |
| 67 | * "cpuend": CPU first notices a grace-period end. |
| 68 | */ |
| 69 | TRACE_EVENT_RCU(rcu_grace_period, |
| 70 | |
| 71 | TP_PROTO(const char *rcuname, unsigned long gp_seq, const char *gpevent), |
| 72 | |
| 73 | TP_ARGS(rcuname, gp_seq, gpevent), |
| 74 | |
| 75 | TP_STRUCT__entry( |
| 76 | __field(const char *, rcuname) |
| 77 | __field(long, gp_seq) |
| 78 | __field(const char *, gpevent) |
| 79 | ), |
| 80 | |
| 81 | TP_fast_assign( |
| 82 | __entry->rcuname = rcuname; |
| 83 | __entry->gp_seq = (long)gp_seq; |
| 84 | __entry->gpevent = gpevent; |
| 85 | ), |
| 86 | |
| 87 | TP_printk("%s %ld %s", |
| 88 | __entry->rcuname, __entry->gp_seq, __entry->gpevent) |
| 89 | ); |
| 90 | |
| 91 | /* |
| 92 | * Tracepoint for future grace-period events. The caller should pull |
| 93 | * the data from the rcu_node structure, other than rcuname, which comes |
| 94 | * from the rcu_state structure, and event, which is one of the following: |
| 95 | * |
| 96 | * "Cleanup": Clean up rcu_node structure after previous GP. |
| 97 | * "CleanupMore": Clean up, and another GP is needed. |
| 98 | * "EndWait": Complete wait. |
| 99 | * "NoGPkthread": The RCU grace-period kthread has not yet started. |
| 100 | * "Prestarted": Someone beat us to the request |
| 101 | * "Startedleaf": Leaf node marked for future GP. |
| 102 | * "Startedleafroot": All nodes from leaf to root marked for future GP. |
| 103 | * "Startedroot": Requested a nocb grace period based on root-node data. |
| 104 | * "Startleaf": Request a grace period based on leaf-node data. |
| 105 | * "StartWait": Start waiting for the requested grace period. |
| 106 | */ |
| 107 | TRACE_EVENT_RCU(rcu_future_grace_period, |
| 108 | |
| 109 | TP_PROTO(const char *rcuname, unsigned long gp_seq, |
| 110 | unsigned long gp_seq_req, u8 level, int grplo, int grphi, |
| 111 | const char *gpevent), |
| 112 | |
| 113 | TP_ARGS(rcuname, gp_seq, gp_seq_req, level, grplo, grphi, gpevent), |
| 114 | |
| 115 | TP_STRUCT__entry( |
| 116 | __field(const char *, rcuname) |
| 117 | __field(long, gp_seq) |
| 118 | __field(long, gp_seq_req) |
| 119 | __field(u8, level) |
| 120 | __field(int, grplo) |
| 121 | __field(int, grphi) |
| 122 | __field(const char *, gpevent) |
| 123 | ), |
| 124 | |
| 125 | TP_fast_assign( |
| 126 | __entry->rcuname = rcuname; |
| 127 | __entry->gp_seq = (long)gp_seq; |
| 128 | __entry->gp_seq_req = (long)gp_seq_req; |
| 129 | __entry->level = level; |
| 130 | __entry->grplo = grplo; |
| 131 | __entry->grphi = grphi; |
| 132 | __entry->gpevent = gpevent; |
| 133 | ), |
| 134 | |
| 135 | TP_printk("%s %ld %ld %u %d %d %s", |
| 136 | __entry->rcuname, (long)__entry->gp_seq, (long)__entry->gp_seq_req, __entry->level, |
| 137 | __entry->grplo, __entry->grphi, __entry->gpevent) |
| 138 | ); |
| 139 | |
| 140 | /* |
| 141 | * Tracepoint for grace-period-initialization events. These are |
| 142 | * distinguished by the type of RCU, the new grace-period number, the |
| 143 | * rcu_node structure level, the starting and ending CPU covered by the |
| 144 | * rcu_node structure, and the mask of CPUs that will be waited for. |
| 145 | * All but the type of RCU are extracted from the rcu_node structure. |
| 146 | */ |
| 147 | TRACE_EVENT_RCU(rcu_grace_period_init, |
| 148 | |
| 149 | TP_PROTO(const char *rcuname, unsigned long gp_seq, u8 level, |
| 150 | int grplo, int grphi, unsigned long qsmask), |
| 151 | |
| 152 | TP_ARGS(rcuname, gp_seq, level, grplo, grphi, qsmask), |
| 153 | |
| 154 | TP_STRUCT__entry( |
| 155 | __field(const char *, rcuname) |
| 156 | __field(long, gp_seq) |
| 157 | __field(u8, level) |
| 158 | __field(int, grplo) |
| 159 | __field(int, grphi) |
| 160 | __field(unsigned long, qsmask) |
| 161 | ), |
| 162 | |
| 163 | TP_fast_assign( |
| 164 | __entry->rcuname = rcuname; |
| 165 | __entry->gp_seq = (long)gp_seq; |
| 166 | __entry->level = level; |
| 167 | __entry->grplo = grplo; |
| 168 | __entry->grphi = grphi; |
| 169 | __entry->qsmask = qsmask; |
| 170 | ), |
| 171 | |
| 172 | TP_printk("%s %ld %u %d %d %lx", |
| 173 | __entry->rcuname, __entry->gp_seq, __entry->level, |
| 174 | __entry->grplo, __entry->grphi, __entry->qsmask) |
| 175 | ); |
| 176 | |
| 177 | /* |
| 178 | * Tracepoint for expedited grace-period events. Takes a string identifying |
| 179 | * the RCU flavor, the expedited grace-period sequence number, and a string |
| 180 | * identifying the grace-period-related event as follows: |
| 181 | * |
| 182 | * "snap": Captured snapshot of expedited grace period sequence number. |
| 183 | * "start": Started a real expedited grace period. |
| 184 | * "reset": Started resetting the tree |
| 185 | * "select": Started selecting the CPUs to wait on. |
| 186 | * "selectofl": Selected CPU partially offline. |
| 187 | * "startwait": Started waiting on selected CPUs. |
| 188 | * "end": Ended a real expedited grace period. |
| 189 | * "endwake": Woke piggybackers up. |
| 190 | * "done": Someone else did the expedited grace period for us. |
| 191 | */ |
| 192 | TRACE_EVENT_RCU(rcu_exp_grace_period, |
| 193 | |
| 194 | TP_PROTO(const char *rcuname, unsigned long gpseq, const char *gpevent), |
| 195 | |
| 196 | TP_ARGS(rcuname, gpseq, gpevent), |
| 197 | |
| 198 | TP_STRUCT__entry( |
| 199 | __field(const char *, rcuname) |
| 200 | __field(long, gpseq) |
| 201 | __field(const char *, gpevent) |
| 202 | ), |
| 203 | |
| 204 | TP_fast_assign( |
| 205 | __entry->rcuname = rcuname; |
| 206 | __entry->gpseq = (long)gpseq; |
| 207 | __entry->gpevent = gpevent; |
| 208 | ), |
| 209 | |
| 210 | TP_printk("%s %#lx %s", |
| 211 | __entry->rcuname, __entry->gpseq, __entry->gpevent) |
| 212 | ); |
| 213 | |
| 214 | /* |
| 215 | * Tracepoint for expedited grace-period funnel-locking events. Takes a |
| 216 | * string identifying the RCU flavor, an integer identifying the rcu_node |
| 217 | * combining-tree level, another pair of integers identifying the lowest- |
| 218 | * and highest-numbered CPU associated with the current rcu_node structure, |
| 219 | * and a string. identifying the grace-period-related event as follows: |
| 220 | * |
| 221 | * "nxtlvl": Advance to next level of rcu_node funnel |
| 222 | * "wait": Wait for someone else to do expedited GP |
| 223 | */ |
| 224 | TRACE_EVENT_RCU(rcu_exp_funnel_lock, |
| 225 | |
| 226 | TP_PROTO(const char *rcuname, u8 level, int grplo, int grphi, |
| 227 | const char *gpevent), |
| 228 | |
| 229 | TP_ARGS(rcuname, level, grplo, grphi, gpevent), |
| 230 | |
| 231 | TP_STRUCT__entry( |
| 232 | __field(const char *, rcuname) |
| 233 | __field(u8, level) |
| 234 | __field(int, grplo) |
| 235 | __field(int, grphi) |
| 236 | __field(const char *, gpevent) |
| 237 | ), |
| 238 | |
| 239 | TP_fast_assign( |
| 240 | __entry->rcuname = rcuname; |
| 241 | __entry->level = level; |
| 242 | __entry->grplo = grplo; |
| 243 | __entry->grphi = grphi; |
| 244 | __entry->gpevent = gpevent; |
| 245 | ), |
| 246 | |
| 247 | TP_printk("%s %d %d %d %s", |
| 248 | __entry->rcuname, __entry->level, __entry->grplo, |
| 249 | __entry->grphi, __entry->gpevent) |
| 250 | ); |
| 251 | |
| 252 | #ifdef CONFIG_RCU_NOCB_CPU |
| 253 | /* |
| 254 | * Tracepoint for RCU no-CBs CPU callback handoffs. This event is intended |
| 255 | * to assist debugging of these handoffs. |
| 256 | * |
| 257 | * The first argument is the name of the RCU flavor, and the second is |
| 258 | * the number of the offloaded CPU are extracted. The third and final |
| 259 | * argument is a string as follows: |
| 260 | * |
| 261 | * "AlreadyAwake": The to-be-awakened rcuo kthread is already awake. |
| 262 | * "Bypass": rcuo GP kthread sees non-empty ->nocb_bypass. |
| 263 | * "CBSleep": rcuo CB kthread sleeping waiting for CBs. |
| 264 | * "Check": rcuo GP kthread checking specified CPU for work. |
| 265 | * "DeferredWake": Timer expired or polled check, time to wake. |
| 266 | * "DoWake": The to-be-awakened rcuo kthread needs to be awakened. |
| 267 | * "EndSleep": Done waiting for GP for !rcu_nocb_poll. |
| 268 | * "FirstBQ": New CB to empty ->nocb_bypass (->cblist maybe non-empty). |
| 269 | * "FirstBQnoWake": FirstBQ plus rcuo kthread need not be awakened. |
| 270 | * "FirstBQwake": FirstBQ plus rcuo kthread must be awakened. |
| 271 | * "FirstQ": New CB to empty ->cblist (->nocb_bypass maybe non-empty). |
| 272 | * "NeedWaitGP": rcuo GP kthread must wait on a grace period. |
| 273 | * "Poll": Start of new polling cycle for rcu_nocb_poll. |
| 274 | * "Sleep": Sleep waiting for GP for !rcu_nocb_poll. |
| 275 | * "Timer": Deferred-wake timer expired. |
| 276 | * "WakeEmptyIsDeferred": Wake rcuo kthread later, first CB to empty list. |
| 277 | * "WakeEmpty": Wake rcuo kthread, first CB to empty list. |
| 278 | * "WakeNot": Don't wake rcuo kthread. |
| 279 | * "WakeNotPoll": Don't wake rcuo kthread because it is polling. |
| 280 | * "WakeOvfIsDeferred": Wake rcuo kthread later, CB list is huge. |
| 281 | * "WakeBypassIsDeferred": Wake rcuo kthread later, bypass list is contended. |
| 282 | * "WokeEmpty": rcuo CB kthread woke to find empty list. |
| 283 | */ |
| 284 | TRACE_EVENT_RCU(rcu_nocb_wake, |
| 285 | |
| 286 | TP_PROTO(const char *rcuname, int cpu, const char *reason), |
| 287 | |
| 288 | TP_ARGS(rcuname, cpu, reason), |
| 289 | |
| 290 | TP_STRUCT__entry( |
| 291 | __field(const char *, rcuname) |
| 292 | __field(int, cpu) |
| 293 | __field(const char *, reason) |
| 294 | ), |
| 295 | |
| 296 | TP_fast_assign( |
| 297 | __entry->rcuname = rcuname; |
| 298 | __entry->cpu = cpu; |
| 299 | __entry->reason = reason; |
| 300 | ), |
| 301 | |
| 302 | TP_printk("%s %d %s", __entry->rcuname, __entry->cpu, __entry->reason) |
| 303 | ); |
| 304 | #endif |
| 305 | |
| 306 | /* |
| 307 | * Tracepoint for tasks blocking within preemptible-RCU read-side |
| 308 | * critical sections. Track the type of RCU (which one day might |
| 309 | * include SRCU), the grace-period number that the task is blocking |
| 310 | * (the current or the next), and the task's PID. |
| 311 | */ |
| 312 | TRACE_EVENT_RCU(rcu_preempt_task, |
| 313 | |
| 314 | TP_PROTO(const char *rcuname, int pid, unsigned long gp_seq), |
| 315 | |
| 316 | TP_ARGS(rcuname, pid, gp_seq), |
| 317 | |
| 318 | TP_STRUCT__entry( |
| 319 | __field(const char *, rcuname) |
| 320 | __field(long, gp_seq) |
| 321 | __field(int, pid) |
| 322 | ), |
| 323 | |
| 324 | TP_fast_assign( |
| 325 | __entry->rcuname = rcuname; |
| 326 | __entry->gp_seq = (long)gp_seq; |
| 327 | __entry->pid = pid; |
| 328 | ), |
| 329 | |
| 330 | TP_printk("%s %ld %d", |
| 331 | __entry->rcuname, __entry->gp_seq, __entry->pid) |
| 332 | ); |
| 333 | |
| 334 | /* |
| 335 | * Tracepoint for tasks that blocked within a given preemptible-RCU |
| 336 | * read-side critical section exiting that critical section. Track the |
| 337 | * type of RCU (which one day might include SRCU) and the task's PID. |
| 338 | */ |
| 339 | TRACE_EVENT_RCU(rcu_unlock_preempted_task, |
| 340 | |
| 341 | TP_PROTO(const char *rcuname, unsigned long gp_seq, int pid), |
| 342 | |
| 343 | TP_ARGS(rcuname, gp_seq, pid), |
| 344 | |
| 345 | TP_STRUCT__entry( |
| 346 | __field(const char *, rcuname) |
| 347 | __field(long, gp_seq) |
| 348 | __field(int, pid) |
| 349 | ), |
| 350 | |
| 351 | TP_fast_assign( |
| 352 | __entry->rcuname = rcuname; |
| 353 | __entry->gp_seq = (long)gp_seq; |
| 354 | __entry->pid = pid; |
| 355 | ), |
| 356 | |
| 357 | TP_printk("%s %ld %d", __entry->rcuname, __entry->gp_seq, __entry->pid) |
| 358 | ); |
| 359 | |
| 360 | /* |
| 361 | * Tracepoint for quiescent-state-reporting events. These are |
| 362 | * distinguished by the type of RCU, the grace-period number, the |
| 363 | * mask of quiescent lower-level entities, the rcu_node structure level, |
| 364 | * the starting and ending CPU covered by the rcu_node structure, and |
| 365 | * whether there are any blocked tasks blocking the current grace period. |
| 366 | * All but the type of RCU are extracted from the rcu_node structure. |
| 367 | */ |
| 368 | TRACE_EVENT_RCU(rcu_quiescent_state_report, |
| 369 | |
| 370 | TP_PROTO(const char *rcuname, unsigned long gp_seq, |
| 371 | unsigned long mask, unsigned long qsmask, |
| 372 | u8 level, int grplo, int grphi, int gp_tasks), |
| 373 | |
| 374 | TP_ARGS(rcuname, gp_seq, mask, qsmask, level, grplo, grphi, gp_tasks), |
| 375 | |
| 376 | TP_STRUCT__entry( |
| 377 | __field(const char *, rcuname) |
| 378 | __field(long, gp_seq) |
| 379 | __field(unsigned long, mask) |
| 380 | __field(unsigned long, qsmask) |
| 381 | __field(u8, level) |
| 382 | __field(int, grplo) |
| 383 | __field(int, grphi) |
| 384 | __field(u8, gp_tasks) |
| 385 | ), |
| 386 | |
| 387 | TP_fast_assign( |
| 388 | __entry->rcuname = rcuname; |
| 389 | __entry->gp_seq = (long)gp_seq; |
| 390 | __entry->mask = mask; |
| 391 | __entry->qsmask = qsmask; |
| 392 | __entry->level = level; |
| 393 | __entry->grplo = grplo; |
| 394 | __entry->grphi = grphi; |
| 395 | __entry->gp_tasks = gp_tasks; |
| 396 | ), |
| 397 | |
| 398 | TP_printk("%s %ld %lx>%lx %u %d %d %u", |
| 399 | __entry->rcuname, __entry->gp_seq, |
| 400 | __entry->mask, __entry->qsmask, __entry->level, |
| 401 | __entry->grplo, __entry->grphi, __entry->gp_tasks) |
| 402 | ); |
| 403 | |
| 404 | /* |
| 405 | * Tracepoint for quiescent states detected by force_quiescent_state(). |
| 406 | * These trace events include the type of RCU, the grace-period number |
| 407 | * that was blocked by the CPU, the CPU itself, and the type of quiescent |
| 408 | * state, which can be "dti" for dyntick-idle mode or "kick" when kicking |
| 409 | * a CPU that has been in dyntick-idle mode for too long. |
| 410 | */ |
| 411 | TRACE_EVENT_RCU(rcu_fqs, |
| 412 | |
| 413 | TP_PROTO(const char *rcuname, unsigned long gp_seq, int cpu, const char *qsevent), |
| 414 | |
| 415 | TP_ARGS(rcuname, gp_seq, cpu, qsevent), |
| 416 | |
| 417 | TP_STRUCT__entry( |
| 418 | __field(const char *, rcuname) |
| 419 | __field(long, gp_seq) |
| 420 | __field(int, cpu) |
| 421 | __field(const char *, qsevent) |
| 422 | ), |
| 423 | |
| 424 | TP_fast_assign( |
| 425 | __entry->rcuname = rcuname; |
| 426 | __entry->gp_seq = (long)gp_seq; |
| 427 | __entry->cpu = cpu; |
| 428 | __entry->qsevent = qsevent; |
| 429 | ), |
| 430 | |
| 431 | TP_printk("%s %ld %d %s", |
| 432 | __entry->rcuname, __entry->gp_seq, |
| 433 | __entry->cpu, __entry->qsevent) |
| 434 | ); |
| 435 | |
| 436 | /* |
| 437 | * Tracepoint for RCU stall events. Takes a string identifying the RCU flavor |
| 438 | * and a string identifying which function detected the RCU stall as follows: |
| 439 | * |
| 440 | * "StallDetected": Scheduler-tick detects other CPU's stalls. |
| 441 | * "SelfDetected": Scheduler-tick detects a current CPU's stall. |
| 442 | * "ExpeditedStall": Expedited grace period detects stalls. |
| 443 | */ |
| 444 | TRACE_EVENT(rcu_stall_warning, |
| 445 | |
| 446 | TP_PROTO(const char *rcuname, const char *msg), |
| 447 | |
| 448 | TP_ARGS(rcuname, msg), |
| 449 | |
| 450 | TP_STRUCT__entry( |
| 451 | __field(const char *, rcuname) |
| 452 | __field(const char *, msg) |
| 453 | ), |
| 454 | |
| 455 | TP_fast_assign( |
| 456 | __entry->rcuname = rcuname; |
| 457 | __entry->msg = msg; |
| 458 | ), |
| 459 | |
| 460 | TP_printk("%s %s", |
| 461 | __entry->rcuname, __entry->msg) |
| 462 | ); |
| 463 | |
| 464 | #endif /* #if defined(CONFIG_TREE_RCU) */ |
| 465 | |
| 466 | /* |
| 467 | * Tracepoint for dyntick-idle entry/exit events. These take 2 strings |
| 468 | * as argument: |
| 469 | * polarity: "Start", "End", "StillWatching" for entering, exiting or still not |
| 470 | * being in EQS mode. |
| 471 | * context: "USER" or "IDLE" or "IRQ". |
| 472 | * NMIs nested in IRQs are inferred with nesting > 1 in IRQ context. |
| 473 | * |
| 474 | * These events also take a pair of numbers, which indicate the nesting |
| 475 | * depth before and after the event of interest, and a third number that is |
| 476 | * the RCU_WATCHING counter. Note that task-related and interrupt-related |
| 477 | * events use two separate counters, and that the "++=" and "--=" events |
| 478 | * for irq/NMI will change the counter by two, otherwise by one. |
| 479 | */ |
| 480 | TRACE_EVENT_RCU(rcu_watching, |
| 481 | |
| 482 | TP_PROTO(const char *polarity, long oldnesting, long newnesting, int counter), |
| 483 | |
| 484 | TP_ARGS(polarity, oldnesting, newnesting, counter), |
| 485 | |
| 486 | TP_STRUCT__entry( |
| 487 | __field(const char *, polarity) |
| 488 | __field(long, oldnesting) |
| 489 | __field(long, newnesting) |
| 490 | __field(int, counter) |
| 491 | ), |
| 492 | |
| 493 | TP_fast_assign( |
| 494 | __entry->polarity = polarity; |
| 495 | __entry->oldnesting = oldnesting; |
| 496 | __entry->newnesting = newnesting; |
| 497 | __entry->counter = counter; |
| 498 | ), |
| 499 | |
| 500 | TP_printk("%s %lx %lx %#3x", __entry->polarity, |
| 501 | __entry->oldnesting, __entry->newnesting, |
| 502 | __entry->counter & 0xfff) |
| 503 | ); |
| 504 | |
| 505 | /* |
| 506 | * Tracepoint for the registration of a single RCU callback function. |
| 507 | * The first argument is the type of RCU, the second argument is |
| 508 | * a pointer to the RCU callback itself, the third element is the |
| 509 | * number of lazy callbacks queued, and the fourth element is the |
| 510 | * total number of callbacks queued. |
| 511 | */ |
| 512 | TRACE_EVENT_RCU(rcu_callback, |
| 513 | |
| 514 | TP_PROTO(const char *rcuname, struct rcu_head *rhp, long qlen), |
| 515 | |
| 516 | TP_ARGS(rcuname, rhp, qlen), |
| 517 | |
| 518 | TP_STRUCT__entry( |
| 519 | __field(const char *, rcuname) |
| 520 | __field(void *, rhp) |
| 521 | __field(void *, func) |
| 522 | __field(long, qlen) |
| 523 | ), |
| 524 | |
| 525 | TP_fast_assign( |
| 526 | __entry->rcuname = rcuname; |
| 527 | __entry->rhp = rhp; |
| 528 | __entry->func = rhp->func; |
| 529 | __entry->qlen = qlen; |
| 530 | ), |
| 531 | |
| 532 | TP_printk("%s rhp=%p func=%ps %ld", |
| 533 | __entry->rcuname, __entry->rhp, __entry->func, |
| 534 | __entry->qlen) |
| 535 | ); |
| 536 | |
| 537 | TRACE_EVENT_RCU(rcu_segcb_stats, |
| 538 | |
| 539 | TP_PROTO(struct rcu_segcblist *rs, const char *ctx), |
| 540 | |
| 541 | TP_ARGS(rs, ctx), |
| 542 | |
| 543 | TP_STRUCT__entry( |
| 544 | __field(const char *, ctx) |
| 545 | __array(unsigned long, gp_seq, RCU_CBLIST_NSEGS) |
| 546 | __array(long, seglen, RCU_CBLIST_NSEGS) |
| 547 | ), |
| 548 | |
| 549 | TP_fast_assign( |
| 550 | __entry->ctx = ctx; |
| 551 | memcpy(__entry->seglen, rs->seglen, RCU_CBLIST_NSEGS * sizeof(long)); |
| 552 | memcpy(__entry->gp_seq, rs->gp_seq, RCU_CBLIST_NSEGS * sizeof(unsigned long)); |
| 553 | |
| 554 | ), |
| 555 | |
| 556 | TP_printk("%s seglen: (DONE=%ld, WAIT=%ld, NEXT_READY=%ld, NEXT=%ld) " |
| 557 | "gp_seq: (DONE=%lu, WAIT=%lu, NEXT_READY=%lu, NEXT=%lu)", __entry->ctx, |
| 558 | __entry->seglen[0], __entry->seglen[1], __entry->seglen[2], __entry->seglen[3], |
| 559 | __entry->gp_seq[0], __entry->gp_seq[1], __entry->gp_seq[2], __entry->gp_seq[3]) |
| 560 | |
| 561 | ); |
| 562 | |
| 563 | /* |
| 564 | * Tracepoint for marking the beginning rcu_do_batch, performed to start |
| 565 | * RCU callback invocation. The first argument is the RCU flavor, |
| 566 | * the second is the number of lazy callbacks queued, the third is |
| 567 | * the total number of callbacks queued, and the fourth argument is |
| 568 | * the current RCU-callback batch limit. |
| 569 | */ |
| 570 | TRACE_EVENT_RCU(rcu_batch_start, |
| 571 | |
| 572 | TP_PROTO(const char *rcuname, long qlen, long blimit), |
| 573 | |
| 574 | TP_ARGS(rcuname, qlen, blimit), |
| 575 | |
| 576 | TP_STRUCT__entry( |
| 577 | __field(const char *, rcuname) |
| 578 | __field(long, qlen) |
| 579 | __field(long, blimit) |
| 580 | ), |
| 581 | |
| 582 | TP_fast_assign( |
| 583 | __entry->rcuname = rcuname; |
| 584 | __entry->qlen = qlen; |
| 585 | __entry->blimit = blimit; |
| 586 | ), |
| 587 | |
| 588 | TP_printk("%s CBs=%ld bl=%ld", |
| 589 | __entry->rcuname, __entry->qlen, __entry->blimit) |
| 590 | ); |
| 591 | |
| 592 | /* |
| 593 | * Tracepoint for the invocation of a single RCU callback function. |
| 594 | * The first argument is the type of RCU, and the second argument is |
| 595 | * a pointer to the RCU callback itself. |
| 596 | */ |
| 597 | TRACE_EVENT_RCU(rcu_invoke_callback, |
| 598 | |
| 599 | TP_PROTO(const char *rcuname, struct rcu_head *rhp), |
| 600 | |
| 601 | TP_ARGS(rcuname, rhp), |
| 602 | |
| 603 | TP_STRUCT__entry( |
| 604 | __field(const char *, rcuname) |
| 605 | __field(void *, rhp) |
| 606 | __field(void *, func) |
| 607 | ), |
| 608 | |
| 609 | TP_fast_assign( |
| 610 | __entry->rcuname = rcuname; |
| 611 | __entry->rhp = rhp; |
| 612 | __entry->func = rhp->func; |
| 613 | ), |
| 614 | |
| 615 | TP_printk("%s rhp=%p func=%ps", |
| 616 | __entry->rcuname, __entry->rhp, __entry->func) |
| 617 | ); |
| 618 | |
| 619 | /* |
| 620 | * Tracepoint for the invocation of a single RCU callback of the special |
| 621 | * kvfree() form. The first argument is the RCU flavor, the second |
| 622 | * argument is a pointer to the RCU callback, and the third argument |
| 623 | * is the offset of the callback within the enclosing RCU-protected |
| 624 | * data structure. |
| 625 | */ |
| 626 | TRACE_EVENT_RCU(rcu_invoke_kvfree_callback, |
| 627 | |
| 628 | TP_PROTO(const char *rcuname, struct rcu_head *rhp, unsigned long offset), |
| 629 | |
| 630 | TP_ARGS(rcuname, rhp, offset), |
| 631 | |
| 632 | TP_STRUCT__entry( |
| 633 | __field(const char *, rcuname) |
| 634 | __field(void *, rhp) |
| 635 | __field(unsigned long, offset) |
| 636 | ), |
| 637 | |
| 638 | TP_fast_assign( |
| 639 | __entry->rcuname = rcuname; |
| 640 | __entry->rhp = rhp; |
| 641 | __entry->offset = offset; |
| 642 | ), |
| 643 | |
| 644 | TP_printk("%s rhp=%p func=%ld", |
| 645 | __entry->rcuname, __entry->rhp, __entry->offset) |
| 646 | ); |
| 647 | |
| 648 | /* |
| 649 | * Tracepoint for the invocation of a single RCU callback of the special |
| 650 | * kfree_bulk() form. The first argument is the RCU flavor, the second |
| 651 | * argument is a number of elements in array to free, the third is an |
| 652 | * address of the array holding nr_records entries. |
| 653 | */ |
| 654 | TRACE_EVENT_RCU(rcu_invoke_kfree_bulk_callback, |
| 655 | |
| 656 | TP_PROTO(const char *rcuname, unsigned long nr_records, void **p), |
| 657 | |
| 658 | TP_ARGS(rcuname, nr_records, p), |
| 659 | |
| 660 | TP_STRUCT__entry( |
| 661 | __field(const char *, rcuname) |
| 662 | __field(unsigned long, nr_records) |
| 663 | __field(void **, p) |
| 664 | ), |
| 665 | |
| 666 | TP_fast_assign( |
| 667 | __entry->rcuname = rcuname; |
| 668 | __entry->nr_records = nr_records; |
| 669 | __entry->p = p; |
| 670 | ), |
| 671 | |
| 672 | TP_printk("%s bulk=0x%p nr_records=%lu", |
| 673 | __entry->rcuname, __entry->p, __entry->nr_records) |
| 674 | ); |
| 675 | |
| 676 | /* |
| 677 | * Tracepoint for a normal synchronize_rcu() states. The first argument |
| 678 | * is the RCU flavor, the second argument is a pointer to rcu_head the |
| 679 | * last one is an event. |
| 680 | */ |
| 681 | TRACE_EVENT_RCU(rcu_sr_normal, |
| 682 | |
| 683 | TP_PROTO(const char *rcuname, struct rcu_head *rhp, const char *srevent), |
| 684 | |
| 685 | TP_ARGS(rcuname, rhp, srevent), |
| 686 | |
| 687 | TP_STRUCT__entry( |
| 688 | __field(const char *, rcuname) |
| 689 | __field(void *, rhp) |
| 690 | __field(const char *, srevent) |
| 691 | ), |
| 692 | |
| 693 | TP_fast_assign( |
| 694 | __entry->rcuname = rcuname; |
| 695 | __entry->rhp = rhp; |
| 696 | __entry->srevent = srevent; |
| 697 | ), |
| 698 | |
| 699 | TP_printk("%s rhp=0x%p event=%s", |
| 700 | __entry->rcuname, __entry->rhp, __entry->srevent) |
| 701 | ); |
| 702 | |
| 703 | /* |
| 704 | * Tracepoint for exiting rcu_do_batch after RCU callbacks have been |
| 705 | * invoked. The first argument is the name of the RCU flavor, |
| 706 | * the second argument is number of callbacks actually invoked, |
| 707 | * the third argument (cb) is whether or not any of the callbacks that |
| 708 | * were ready to invoke at the beginning of this batch are still |
| 709 | * queued, the fourth argument (nr) is the return value of need_resched(), |
| 710 | * the fifth argument (iit) is 1 if the current task is the idle task, |
| 711 | * and the sixth argument (risk) is the return value from |
| 712 | * rcu_is_callbacks_kthread(). |
| 713 | */ |
| 714 | TRACE_EVENT_RCU(rcu_batch_end, |
| 715 | |
| 716 | TP_PROTO(const char *rcuname, int callbacks_invoked, |
| 717 | char cb, char nr, char iit, char risk), |
| 718 | |
| 719 | TP_ARGS(rcuname, callbacks_invoked, cb, nr, iit, risk), |
| 720 | |
| 721 | TP_STRUCT__entry( |
| 722 | __field(const char *, rcuname) |
| 723 | __field(int, callbacks_invoked) |
| 724 | __field(char, cb) |
| 725 | __field(char, nr) |
| 726 | __field(char, iit) |
| 727 | __field(char, risk) |
| 728 | ), |
| 729 | |
| 730 | TP_fast_assign( |
| 731 | __entry->rcuname = rcuname; |
| 732 | __entry->callbacks_invoked = callbacks_invoked; |
| 733 | __entry->cb = cb; |
| 734 | __entry->nr = nr; |
| 735 | __entry->iit = iit; |
| 736 | __entry->risk = risk; |
| 737 | ), |
| 738 | |
| 739 | TP_printk("%s CBs-invoked=%d idle=%c%c%c%c", |
| 740 | __entry->rcuname, __entry->callbacks_invoked, |
| 741 | __entry->cb ? 'C' : '.', |
| 742 | __entry->nr ? 'S' : '.', |
| 743 | __entry->iit ? 'I' : '.', |
| 744 | __entry->risk ? 'R' : '.') |
| 745 | ); |
| 746 | |
| 747 | /* |
| 748 | * Tracepoint for rcutorture readers. The first argument is the name |
| 749 | * of the RCU flavor from rcutorture's viewpoint and the second argument |
| 750 | * is the callback address. The third argument is the start time in |
| 751 | * seconds, and the last two arguments are the grace period numbers |
| 752 | * at the beginning and end of the read, respectively. Note that the |
| 753 | * callback address can be NULL. |
| 754 | */ |
| 755 | #define RCUTORTURENAME_LEN 8 |
| 756 | TRACE_EVENT_RCU(rcu_torture_read, |
| 757 | |
| 758 | TP_PROTO(const char *rcutorturename, struct rcu_head *rhp, |
| 759 | unsigned long secs, unsigned long c_old, unsigned long c), |
| 760 | |
| 761 | TP_ARGS(rcutorturename, rhp, secs, c_old, c), |
| 762 | |
| 763 | TP_STRUCT__entry( |
| 764 | __array(char, rcutorturename, RCUTORTURENAME_LEN) |
| 765 | __field(struct rcu_head *, rhp) |
| 766 | __field(unsigned long, secs) |
| 767 | __field(unsigned long, c_old) |
| 768 | __field(unsigned long, c) |
| 769 | ), |
| 770 | |
| 771 | TP_fast_assign( |
| 772 | strscpy(__entry->rcutorturename, rcutorturename, RCUTORTURENAME_LEN); |
| 773 | __entry->rhp = rhp; |
| 774 | __entry->secs = secs; |
| 775 | __entry->c_old = c_old; |
| 776 | __entry->c = c; |
| 777 | ), |
| 778 | |
| 779 | TP_printk("%s torture read %p %luus c: %lu %lu", |
| 780 | __entry->rcutorturename, __entry->rhp, |
| 781 | __entry->secs, __entry->c_old, __entry->c) |
| 782 | ); |
| 783 | |
| 784 | /* |
| 785 | * Tracepoint for rcu_barrier() execution. The string "s" describes |
| 786 | * the rcu_barrier phase: |
| 787 | * "Begin": rcu_barrier() started. |
| 788 | * "CB": An rcu_barrier_callback() invoked a callback, not the last. |
| 789 | * "EarlyExit": rcu_barrier() piggybacked, thus early exit. |
| 790 | * "Inc1": rcu_barrier() piggyback check counter incremented. |
| 791 | * "Inc2": rcu_barrier() piggyback check counter incremented. |
| 792 | * "IRQ": An rcu_barrier_callback() callback posted on remote CPU. |
| 793 | * "IRQNQ": An rcu_barrier_callback() callback found no callbacks. |
| 794 | * "LastCB": An rcu_barrier_callback() invoked the last callback. |
| 795 | * "NQ": rcu_barrier() found a CPU with no callbacks. |
| 796 | * "OnlineQ": rcu_barrier() found online CPU with callbacks. |
| 797 | * The "cpu" argument is the CPU or -1 if meaningless, the "cnt" argument |
| 798 | * is the count of remaining callbacks, and "done" is the piggybacking count. |
| 799 | */ |
| 800 | TRACE_EVENT_RCU(rcu_barrier, |
| 801 | |
| 802 | TP_PROTO(const char *rcuname, const char *s, int cpu, int cnt, unsigned long done), |
| 803 | |
| 804 | TP_ARGS(rcuname, s, cpu, cnt, done), |
| 805 | |
| 806 | TP_STRUCT__entry( |
| 807 | __field(const char *, rcuname) |
| 808 | __field(const char *, s) |
| 809 | __field(int, cpu) |
| 810 | __field(int, cnt) |
| 811 | __field(unsigned long, done) |
| 812 | ), |
| 813 | |
| 814 | TP_fast_assign( |
| 815 | __entry->rcuname = rcuname; |
| 816 | __entry->s = s; |
| 817 | __entry->cpu = cpu; |
| 818 | __entry->cnt = cnt; |
| 819 | __entry->done = done; |
| 820 | ), |
| 821 | |
| 822 | TP_printk("%s %s cpu %d remaining %d # %lu", |
| 823 | __entry->rcuname, __entry->s, __entry->cpu, __entry->cnt, |
| 824 | __entry->done) |
| 825 | ); |
| 826 | |
| 827 | #endif /* _TRACE_RCU_H */ |
| 828 | |
| 829 | /* This part must be outside protection */ |
| 830 | #include <trace/define_trace.h> |
| 831 |
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