1 #undef TRACE_SYSTEM 2 #define TRACE_SYSTEM writeback 3 4 #if !defined(_TRACE_WRITEBACK_H) || defined(TRACE_HEADER_MULTI_READ) 5 #define _TRACE_WRITEBACK_H 6 7 #include <linux/backing-dev.h> 8 #include <linux/device.h> 9 #include <linux/writeback.h> 10 11 #define show_inode_state(state) \ 12 __print_flags(state, "|", \ 13 {I_DIRTY_SYNC, "I_DIRTY_SYNC"}, \ 14 {I_DIRTY_DATASYNC, "I_DIRTY_DATASYNC"}, \ 15 {I_DIRTY_PAGES, "I_DIRTY_PAGES"}, \ 16 {I_NEW, "I_NEW"}, \ 17 {I_WILL_FREE, "I_WILL_FREE"}, \ 18 {I_FREEING, "I_FREEING"}, \ 19 {I_CLEAR, "I_CLEAR"}, \ 20 {I_SYNC, "I_SYNC"}, \ 21 {I_REFERENCED, "I_REFERENCED"} \ 22 ) 23 24 #define WB_WORK_REASON \ 25 {WB_REASON_BACKGROUND, "background"}, \ 26 {WB_REASON_TRY_TO_FREE_PAGES, "try_to_free_pages"}, \ 27 {WB_REASON_SYNC, "sync"}, \ 28 {WB_REASON_PERIODIC, "periodic"}, \ 29 {WB_REASON_LAPTOP_TIMER, "laptop_timer"}, \ 30 {WB_REASON_FREE_MORE_MEM, "free_more_memory"}, \ 31 {WB_REASON_FS_FREE_SPACE, "fs_free_space"}, \ 32 {WB_REASON_FORKER_THREAD, "forker_thread"} 33 34 struct wb_writeback_work; 35 36 DECLARE_EVENT_CLASS(writeback_work_class, 37 TP_PROTO(struct backing_dev_info *bdi, struct wb_writeback_work *work), 38 TP_ARGS(bdi, work), 39 TP_STRUCT__entry( 40 __array(char, name, 32) 41 __field(long, nr_pages) 42 __field(dev_t, sb_dev) 43 __field(int, sync_mode) 44 __field(int, for_kupdate) 45 __field(int, range_cyclic) 46 __field(int, for_background) 47 __field(int, reason) 48 ), 49 TP_fast_assign( 50 struct device *dev = bdi->dev; 51 if (!dev) 52 dev = default_backing_dev_info.dev; 53 strncpy(__entry->name, dev_name(dev), 32); 54 __entry->nr_pages = work->nr_pages; 55 __entry->sb_dev = work->sb ? work->sb->s_dev : 0; 56 __entry->sync_mode = work->sync_mode; 57 __entry->for_kupdate = work->for_kupdate; 58 __entry->range_cyclic = work->range_cyclic; 59 __entry->for_background = work->for_background; 60 __entry->reason = work->reason; 61 ), 62 TP_printk("bdi %s: sb_dev %d:%d nr_pages=%ld sync_mode=%d " 63 "kupdate=%d range_cyclic=%d background=%d reason=%s", 64 __entry->name, 65 MAJOR(__entry->sb_dev), MINOR(__entry->sb_dev), 66 __entry->nr_pages, 67 __entry->sync_mode, 68 __entry->for_kupdate, 69 __entry->range_cyclic, 70 __entry->for_background, 71 __print_symbolic(__entry->reason, WB_WORK_REASON) 72 ) 73 ); 74 #define DEFINE_WRITEBACK_WORK_EVENT(name) \ 75 DEFINE_EVENT(writeback_work_class, name, \ 76 TP_PROTO(struct backing_dev_info *bdi, struct wb_writeback_work *work), \ 77 TP_ARGS(bdi, work)) 78 DEFINE_WRITEBACK_WORK_EVENT(writeback_nothread); 79 DEFINE_WRITEBACK_WORK_EVENT(writeback_queue); 80 DEFINE_WRITEBACK_WORK_EVENT(writeback_exec); 81 DEFINE_WRITEBACK_WORK_EVENT(writeback_start); 82 DEFINE_WRITEBACK_WORK_EVENT(writeback_written); 83 DEFINE_WRITEBACK_WORK_EVENT(writeback_wait); 84 85 TRACE_EVENT(writeback_pages_written, 86 TP_PROTO(long pages_written), 87 TP_ARGS(pages_written), 88 TP_STRUCT__entry( 89 __field(long, pages) 90 ), 91 TP_fast_assign( 92 __entry->pages = pages_written; 93 ), 94 TP_printk("%ld", __entry->pages) 95 ); 96 97 DECLARE_EVENT_CLASS(writeback_class, 98 TP_PROTO(struct backing_dev_info *bdi), 99 TP_ARGS(bdi), 100 TP_STRUCT__entry( 101 __array(char, name, 32) 102 ), 103 TP_fast_assign( 104 strncpy(__entry->name, dev_name(bdi->dev), 32); 105 ), 106 TP_printk("bdi %s", 107 __entry->name 108 ) 109 ); 110 #define DEFINE_WRITEBACK_EVENT(name) \ 111 DEFINE_EVENT(writeback_class, name, \ 112 TP_PROTO(struct backing_dev_info *bdi), \ 113 TP_ARGS(bdi)) 114 115 DEFINE_WRITEBACK_EVENT(writeback_nowork); 116 DEFINE_WRITEBACK_EVENT(writeback_wake_background); 117 DEFINE_WRITEBACK_EVENT(writeback_wake_thread); 118 DEFINE_WRITEBACK_EVENT(writeback_wake_forker_thread); 119 DEFINE_WRITEBACK_EVENT(writeback_bdi_register); 120 DEFINE_WRITEBACK_EVENT(writeback_bdi_unregister); 121 DEFINE_WRITEBACK_EVENT(writeback_thread_start); 122 DEFINE_WRITEBACK_EVENT(writeback_thread_stop); 123 124 DECLARE_EVENT_CLASS(wbc_class, 125 TP_PROTO(struct writeback_control *wbc, struct backing_dev_info *bdi), 126 TP_ARGS(wbc, bdi), 127 TP_STRUCT__entry( 128 __array(char, name, 32) 129 __field(long, nr_to_write) 130 __field(long, pages_skipped) 131 __field(int, sync_mode) 132 __field(int, for_kupdate) 133 __field(int, for_background) 134 __field(int, for_reclaim) 135 __field(int, range_cyclic) 136 __field(long, range_start) 137 __field(long, range_end) 138 ), 139 140 TP_fast_assign( 141 strncpy(__entry->name, dev_name(bdi->dev), 32); 142 __entry->nr_to_write = wbc->nr_to_write; 143 __entry->pages_skipped = wbc->pages_skipped; 144 __entry->sync_mode = wbc->sync_mode; 145 __entry->for_kupdate = wbc->for_kupdate; 146 __entry->for_background = wbc->for_background; 147 __entry->for_reclaim = wbc->for_reclaim; 148 __entry->range_cyclic = wbc->range_cyclic; 149 __entry->range_start = (long)wbc->range_start; 150 __entry->range_end = (long)wbc->range_end; 151 ), 152 153 TP_printk("bdi %s: towrt=%ld skip=%ld mode=%d kupd=%d " 154 "bgrd=%d reclm=%d cyclic=%d " 155 "start=0x%lx end=0x%lx", 156 __entry->name, 157 __entry->nr_to_write, 158 __entry->pages_skipped, 159 __entry->sync_mode, 160 __entry->for_kupdate, 161 __entry->for_background, 162 __entry->for_reclaim, 163 __entry->range_cyclic, 164 __entry->range_start, 165 __entry->range_end) 166 ) 167 168 #define DEFINE_WBC_EVENT(name) \ 169 DEFINE_EVENT(wbc_class, name, \ 170 TP_PROTO(struct writeback_control *wbc, struct backing_dev_info *bdi), \ 171 TP_ARGS(wbc, bdi)) 172 DEFINE_WBC_EVENT(wbc_writepage); 173 174 TRACE_EVENT(writeback_queue_io, 175 TP_PROTO(struct bdi_writeback *wb, 176 struct wb_writeback_work *work, 177 int moved), 178 TP_ARGS(wb, work, moved), 179 TP_STRUCT__entry( 180 __array(char, name, 32) 181 __field(unsigned long, older) 182 __field(long, age) 183 __field(int, moved) 184 __field(int, reason) 185 ), 186 TP_fast_assign( 187 unsigned long *older_than_this = work->older_than_this; 188 strncpy(__entry->name, dev_name(wb->bdi->dev), 32); 189 __entry->older = older_than_this ? *older_than_this : 0; 190 __entry->age = older_than_this ? 191 (jiffies - *older_than_this) * 1000 / HZ : -1; 192 __entry->moved = moved; 193 __entry->reason = work->reason; 194 ), 195 TP_printk("bdi %s: older=%lu age=%ld enqueue=%d reason=%s", 196 __entry->name, 197 __entry->older, /* older_than_this in jiffies */ 198 __entry->age, /* older_than_this in relative milliseconds */ 199 __entry->moved, 200 __print_symbolic(__entry->reason, WB_WORK_REASON) 201 ) 202 ); 203 204 TRACE_EVENT(global_dirty_state, 205 206 TP_PROTO(unsigned long background_thresh, 207 unsigned long dirty_thresh 208 ), 209 210 TP_ARGS(background_thresh, 211 dirty_thresh 212 ), 213 214 TP_STRUCT__entry( 215 __field(unsigned long, nr_dirty) 216 __field(unsigned long, nr_writeback) 217 __field(unsigned long, nr_unstable) 218 __field(unsigned long, background_thresh) 219 __field(unsigned long, dirty_thresh) 220 __field(unsigned long, dirty_limit) 221 __field(unsigned long, nr_dirtied) 222 __field(unsigned long, nr_written) 223 ), 224 225 TP_fast_assign( 226 __entry->nr_dirty = global_page_state(NR_FILE_DIRTY); 227 __entry->nr_writeback = global_page_state(NR_WRITEBACK); 228 __entry->nr_unstable = global_page_state(NR_UNSTABLE_NFS); 229 __entry->nr_dirtied = global_page_state(NR_DIRTIED); 230 __entry->nr_written = global_page_state(NR_WRITTEN); 231 __entry->background_thresh = background_thresh; 232 __entry->dirty_thresh = dirty_thresh; 233 __entry->dirty_limit = global_dirty_limit; 234 ), 235 236 TP_printk("dirty=%lu writeback=%lu unstable=%lu " 237 "bg_thresh=%lu thresh=%lu limit=%lu " 238 "dirtied=%lu written=%lu", 239 __entry->nr_dirty, 240 __entry->nr_writeback, 241 __entry->nr_unstable, 242 __entry->background_thresh, 243 __entry->dirty_thresh, 244 __entry->dirty_limit, 245 __entry->nr_dirtied, 246 __entry->nr_written 247 ) 248 ); 249 250 #define KBps(x) ((x) << (PAGE_SHIFT - 10)) 251 252 TRACE_EVENT(bdi_dirty_ratelimit, 253 254 TP_PROTO(struct backing_dev_info *bdi, 255 unsigned long dirty_rate, 256 unsigned long task_ratelimit), 257 258 TP_ARGS(bdi, dirty_rate, task_ratelimit), 259 260 TP_STRUCT__entry( 261 __array(char, bdi, 32) 262 __field(unsigned long, write_bw) 263 __field(unsigned long, avg_write_bw) 264 __field(unsigned long, dirty_rate) 265 __field(unsigned long, dirty_ratelimit) 266 __field(unsigned long, task_ratelimit) 267 __field(unsigned long, balanced_dirty_ratelimit) 268 ), 269 270 TP_fast_assign( 271 strlcpy(__entry->bdi, dev_name(bdi->dev), 32); 272 __entry->write_bw = KBps(bdi->write_bandwidth); 273 __entry->avg_write_bw = KBps(bdi->avg_write_bandwidth); 274 __entry->dirty_rate = KBps(dirty_rate); 275 __entry->dirty_ratelimit = KBps(bdi->dirty_ratelimit); 276 __entry->task_ratelimit = KBps(task_ratelimit); 277 __entry->balanced_dirty_ratelimit = 278 KBps(bdi->balanced_dirty_ratelimit); 279 ), 280 281 TP_printk("bdi %s: " 282 "write_bw=%lu awrite_bw=%lu dirty_rate=%lu " 283 "dirty_ratelimit=%lu task_ratelimit=%lu " 284 "balanced_dirty_ratelimit=%lu", 285 __entry->bdi, 286 __entry->write_bw, /* write bandwidth */ 287 __entry->avg_write_bw, /* avg write bandwidth */ 288 __entry->dirty_rate, /* bdi dirty rate */ 289 __entry->dirty_ratelimit, /* base ratelimit */ 290 __entry->task_ratelimit, /* ratelimit with position control */ 291 __entry->balanced_dirty_ratelimit /* the balanced ratelimit */ 292 ) 293 ); 294 295 TRACE_EVENT(balance_dirty_pages, 296 297 TP_PROTO(struct backing_dev_info *bdi, 298 unsigned long thresh, 299 unsigned long bg_thresh, 300 unsigned long dirty, 301 unsigned long bdi_thresh, 302 unsigned long bdi_dirty, 303 unsigned long dirty_ratelimit, 304 unsigned long task_ratelimit, 305 unsigned long dirtied, 306 unsigned long period, 307 long pause, 308 unsigned long start_time), 309 310 TP_ARGS(bdi, thresh, bg_thresh, dirty, bdi_thresh, bdi_dirty, 311 dirty_ratelimit, task_ratelimit, 312 dirtied, period, pause, start_time), 313 314 TP_STRUCT__entry( 315 __array( char, bdi, 32) 316 __field(unsigned long, limit) 317 __field(unsigned long, setpoint) 318 __field(unsigned long, dirty) 319 __field(unsigned long, bdi_setpoint) 320 __field(unsigned long, bdi_dirty) 321 __field(unsigned long, dirty_ratelimit) 322 __field(unsigned long, task_ratelimit) 323 __field(unsigned int, dirtied) 324 __field(unsigned int, dirtied_pause) 325 __field(unsigned long, paused) 326 __field( long, pause) 327 __field(unsigned long, period) 328 __field( long, think) 329 ), 330 331 TP_fast_assign( 332 unsigned long freerun = (thresh + bg_thresh) / 2; 333 strlcpy(__entry->bdi, dev_name(bdi->dev), 32); 334 335 __entry->limit = global_dirty_limit; 336 __entry->setpoint = (global_dirty_limit + freerun) / 2; 337 __entry->dirty = dirty; 338 __entry->bdi_setpoint = __entry->setpoint * 339 bdi_thresh / (thresh + 1); 340 __entry->bdi_dirty = bdi_dirty; 341 __entry->dirty_ratelimit = KBps(dirty_ratelimit); 342 __entry->task_ratelimit = KBps(task_ratelimit); 343 __entry->dirtied = dirtied; 344 __entry->dirtied_pause = current->nr_dirtied_pause; 345 __entry->think = current->dirty_paused_when == 0 ? 0 : 346 (long)(jiffies - current->dirty_paused_when) * 1000/HZ; 347 __entry->period = period * 1000 / HZ; 348 __entry->pause = pause * 1000 / HZ; 349 __entry->paused = (jiffies - start_time) * 1000 / HZ; 350 ), 351 352 353 TP_printk("bdi %s: " 354 "limit=%lu setpoint=%lu dirty=%lu " 355 "bdi_setpoint=%lu bdi_dirty=%lu " 356 "dirty_ratelimit=%lu task_ratelimit=%lu " 357 "dirtied=%u dirtied_pause=%u " 358 "paused=%lu pause=%ld period=%lu think=%ld", 359 __entry->bdi, 360 __entry->limit, 361 __entry->setpoint, 362 __entry->dirty, 363 __entry->bdi_setpoint, 364 __entry->bdi_dirty, 365 __entry->dirty_ratelimit, 366 __entry->task_ratelimit, 367 __entry->dirtied, 368 __entry->dirtied_pause, 369 __entry->paused, /* ms */ 370 __entry->pause, /* ms */ 371 __entry->period, /* ms */ 372 __entry->think /* ms */ 373 ) 374 ); 375 376 DECLARE_EVENT_CLASS(writeback_congest_waited_template, 377 378 TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed), 379 380 TP_ARGS(usec_timeout, usec_delayed), 381 382 TP_STRUCT__entry( 383 __field( unsigned int, usec_timeout ) 384 __field( unsigned int, usec_delayed ) 385 ), 386 387 TP_fast_assign( 388 __entry->usec_timeout = usec_timeout; 389 __entry->usec_delayed = usec_delayed; 390 ), 391 392 TP_printk("usec_timeout=%u usec_delayed=%u", 393 __entry->usec_timeout, 394 __entry->usec_delayed) 395 ); 396 397 DEFINE_EVENT(writeback_congest_waited_template, writeback_congestion_wait, 398 399 TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed), 400 401 TP_ARGS(usec_timeout, usec_delayed) 402 ); 403 404 DEFINE_EVENT(writeback_congest_waited_template, writeback_wait_iff_congested, 405 406 TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed), 407 408 TP_ARGS(usec_timeout, usec_delayed) 409 ); 410 411 DECLARE_EVENT_CLASS(writeback_single_inode_template, 412 413 TP_PROTO(struct inode *inode, 414 struct writeback_control *wbc, 415 unsigned long nr_to_write 416 ), 417 418 TP_ARGS(inode, wbc, nr_to_write), 419 420 TP_STRUCT__entry( 421 __array(char, name, 32) 422 __field(unsigned long, ino) 423 __field(unsigned long, state) 424 __field(unsigned long, dirtied_when) 425 __field(unsigned long, writeback_index) 426 __field(long, nr_to_write) 427 __field(unsigned long, wrote) 428 ), 429 430 TP_fast_assign( 431 strncpy(__entry->name, 432 dev_name(inode_to_bdi(inode)->dev), 32); 433 __entry->ino = inode->i_ino; 434 __entry->state = inode->i_state; 435 __entry->dirtied_when = inode->dirtied_when; 436 __entry->writeback_index = inode->i_mapping->writeback_index; 437 __entry->nr_to_write = nr_to_write; 438 __entry->wrote = nr_to_write - wbc->nr_to_write; 439 ), 440 441 TP_printk("bdi %s: ino=%lu state=%s dirtied_when=%lu age=%lu " 442 "index=%lu to_write=%ld wrote=%lu", 443 __entry->name, 444 __entry->ino, 445 show_inode_state(__entry->state), 446 __entry->dirtied_when, 447 (jiffies - __entry->dirtied_when) / HZ, 448 __entry->writeback_index, 449 __entry->nr_to_write, 450 __entry->wrote 451 ) 452 ); 453 454 DEFINE_EVENT(writeback_single_inode_template, writeback_single_inode_requeue, 455 TP_PROTO(struct inode *inode, 456 struct writeback_control *wbc, 457 unsigned long nr_to_write), 458 TP_ARGS(inode, wbc, nr_to_write) 459 ); 460 461 DEFINE_EVENT(writeback_single_inode_template, writeback_single_inode, 462 TP_PROTO(struct inode *inode, 463 struct writeback_control *wbc, 464 unsigned long nr_to_write), 465 TP_ARGS(inode, wbc, nr_to_write) 466 ); 467 468 #endif /* _TRACE_WRITEBACK_H */ 469 470 /* This part must be outside protection */ 471 #include <trace/define_trace.h> 472