include/trace/events/writeback.h

   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                  long pause,
 307                  unsigned long start_time),
 308
 309         TP_ARGS(bdi, thresh, bg_thresh, dirty, bdi_thresh, bdi_dirty,
 310                 dirty_ratelimit, task_ratelimit,
 311                 dirtied, pause, start_time),
 312
 313         TP_STRUCT__entry(
 314                 __array(         char,  bdi, 32)
 315                 __field(unsigned long,  limit)
 316                 __field(unsigned long,  setpoint)
 317                 __field(unsigned long,  dirty)
 318                 __field(unsigned long,  bdi_setpoint)
 319                 __field(unsigned long,  bdi_dirty)
 320                 __field(unsigned long,  dirty_ratelimit)
 321                 __field(unsigned long,  task_ratelimit)
 322                 __field(unsigned int,   dirtied)
 323                 __field(unsigned int,   dirtied_pause)
 324                 __field(unsigned long,  paused)
 325                 __field(         long,  pause)
 326         ),
 327
 328         TP_fast_assign(
 329                 unsigned long freerun = (thresh + bg_thresh) / 2;
 330                 strlcpy(__entry->bdi, dev_name(bdi->dev), 32);
 331
 332                 __entry->limit          = global_dirty_limit;
 333                 __entry->setpoint       = (global_dirty_limit + freerun) / 2;
 334                 __entry->dirty          = dirty;
 335                 __entry->bdi_setpoint   = __entry->setpoint *
 336                                                 bdi_thresh / (thresh + 1);
 337                 __entry->bdi_dirty      = bdi_dirty;
 338                 __entry->dirty_ratelimit = KBps(dirty_ratelimit);
 339                 __entry->task_ratelimit = KBps(task_ratelimit);
 340                 __entry->dirtied        = dirtied;
 341                 __entry->dirtied_pause  = current->nr_dirtied_pause;
 342                 __entry->pause          = pause * 1000 / HZ;
 343                 __entry->paused         = (jiffies - start_time) * 1000 / HZ;
 344         ),
 345
 346
 347         TP_printk("bdi %s: "
 348                   "limit=%lu setpoint=%lu dirty=%lu "
 349                   "bdi_setpoint=%lu bdi_dirty=%lu "
 350                   "dirty_ratelimit=%lu task_ratelimit=%lu "
 351                   "dirtied=%u dirtied_pause=%u "
 352                   "paused=%lu pause=%ld",
 353                   __entry->bdi,
 354                   __entry->limit,
 355                   __entry->setpoint,
 356                   __entry->dirty,
 357                   __entry->bdi_setpoint,
 358                   __entry->bdi_dirty,
 359                   __entry->dirty_ratelimit,
 360                   __entry->task_ratelimit,
 361                   __entry->dirtied,
 362                   __entry->dirtied_pause,
 363                   __entry->paused,      /* ms */
 364                   __entry->pause        /* ms */
 365           )
 366 );
 367
 368 DECLARE_EVENT_CLASS(writeback_congest_waited_template,
 369
 370         TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed),
 371
 372         TP_ARGS(usec_timeout, usec_delayed),
 373
 374         TP_STRUCT__entry(
 375                 __field(        unsigned int,   usec_timeout    )
 376                 __field(        unsigned int,   usec_delayed    )
 377         ),
 378
 379         TP_fast_assign(
 380                 __entry->usec_timeout   = usec_timeout;
 381                 __entry->usec_delayed   = usec_delayed;
 382         ),
 383
 384         TP_printk("usec_timeout=%u usec_delayed=%u",
 385                         __entry->usec_timeout,
 386                         __entry->usec_delayed)
 387 );
 388
 389 DEFINE_EVENT(writeback_congest_waited_template, writeback_congestion_wait,
 390
 391         TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed),
 392
 393         TP_ARGS(usec_timeout, usec_delayed)
 394 );
 395
 396 DEFINE_EVENT(writeback_congest_waited_template, writeback_wait_iff_congested,
 397
 398         TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed),
 399
 400         TP_ARGS(usec_timeout, usec_delayed)
 401 );
 402
 403 DECLARE_EVENT_CLASS(writeback_single_inode_template,
 404
 405         TP_PROTO(struct inode *inode,
 406                  struct writeback_control *wbc,
 407                  unsigned long nr_to_write
 408         ),
 409
 410         TP_ARGS(inode, wbc, nr_to_write),
 411
 412         TP_STRUCT__entry(
 413                 __array(char, name, 32)
 414                 __field(unsigned long, ino)
 415                 __field(unsigned long, state)
 416                 __field(unsigned long, dirtied_when)
 417                 __field(unsigned long, writeback_index)
 418                 __field(long, nr_to_write)
 419                 __field(unsigned long, wrote)
 420         ),
 421
 422         TP_fast_assign(
 423                 strncpy(__entry->name,
 424                         dev_name(inode_to_bdi(inode)->dev), 32);
 425                 __entry->ino            = inode->i_ino;
 426                 __entry->state          = inode->i_state;
 427                 __entry->dirtied_when   = inode->dirtied_when;
 428                 __entry->writeback_index = inode->i_mapping->writeback_index;
 429                 __entry->nr_to_write    = nr_to_write;
 430                 __entry->wrote          = nr_to_write - wbc->nr_to_write;
 431         ),
 432
 433         TP_printk("bdi %s: ino=%lu state=%s dirtied_when=%lu age=%lu "
 434                   "index=%lu to_write=%ld wrote=%lu",
 435                   __entry->name,
 436                   __entry->ino,
 437                   show_inode_state(__entry->state),
 438                   __entry->dirtied_when,
 439                   (jiffies - __entry->dirtied_when) / HZ,
 440                   __entry->writeback_index,
 441                   __entry->nr_to_write,
 442                   __entry->wrote
 443         )
 444 );
 445
 446 DEFINE_EVENT(writeback_single_inode_template, writeback_single_inode_requeue,
 447         TP_PROTO(struct inode *inode,
 448                  struct writeback_control *wbc,
 449                  unsigned long nr_to_write),
 450         TP_ARGS(inode, wbc, nr_to_write)
 451 );
 452
 453 DEFINE_EVENT(writeback_single_inode_template, writeback_single_inode,
 454         TP_PROTO(struct inode *inode,
 455                  struct writeback_control *wbc,
 456                  unsigned long nr_to_write),
 457         TP_ARGS(inode, wbc, nr_to_write)
 458 );
 459
 460 #endif /* _TRACE_WRITEBACK_H */
 461
 462 /* This part must be outside protection */
 463 #include <trace/define_trace.h>