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[lttng-modules.git] / instrumentation / events / mainline / 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/writeback.h>
9
10 #define show_inode_state(state) \
11 __print_flags(state, "|", \
12 {I_DIRTY_SYNC, "I_DIRTY_SYNC"}, \
13 {I_DIRTY_DATASYNC, "I_DIRTY_DATASYNC"}, \
14 {I_DIRTY_PAGES, "I_DIRTY_PAGES"}, \
15 {I_NEW, "I_NEW"}, \
16 {I_WILL_FREE, "I_WILL_FREE"}, \
17 {I_FREEING, "I_FREEING"}, \
18 {I_CLEAR, "I_CLEAR"}, \
19 {I_SYNC, "I_SYNC"}, \
20 {I_REFERENCED, "I_REFERENCED"} \
21 )
22
23 #define WB_WORK_REASON \
24 {WB_REASON_BACKGROUND, "background"}, \
25 {WB_REASON_TRY_TO_FREE_PAGES, "try_to_free_pages"}, \
26 {WB_REASON_SYNC, "sync"}, \
27 {WB_REASON_PERIODIC, "periodic"}, \
28 {WB_REASON_LAPTOP_TIMER, "laptop_timer"}, \
29 {WB_REASON_FREE_MORE_MEM, "free_more_memory"}, \
30 {WB_REASON_FS_FREE_SPACE, "fs_free_space"}, \
31 {WB_REASON_FORKER_THREAD, "forker_thread"}
32
33 struct wb_writeback_work;
34
35 DECLARE_EVENT_CLASS(writeback_work_class,
36 TP_PROTO(struct backing_dev_info *bdi, struct wb_writeback_work *work),
37 TP_ARGS(bdi, work),
38 TP_STRUCT__entry(
39 __array(char, name, 32)
40 __field(long, nr_pages)
41 __field(dev_t, sb_dev)
42 __field(int, sync_mode)
43 __field(int, for_kupdate)
44 __field(int, range_cyclic)
45 __field(int, for_background)
46 __field(int, reason)
47 ),
48 TP_fast_assign(
49 struct device *dev = bdi->dev;
50 if (!dev)
51 dev = default_backing_dev_info.dev;
52 strncpy(__entry->name, dev_name(dev), 32);
53 __entry->nr_pages = work->nr_pages;
54 __entry->sb_dev = work->sb ? work->sb->s_dev : 0;
55 __entry->sync_mode = work->sync_mode;
56 __entry->for_kupdate = work->for_kupdate;
57 __entry->range_cyclic = work->range_cyclic;
58 __entry->for_background = work->for_background;
59 __entry->reason = work->reason;
60 ),
61 TP_printk("bdi %s: sb_dev %d:%d nr_pages=%ld sync_mode=%d "
62 "kupdate=%d range_cyclic=%d background=%d reason=%s",
63 __entry->name,
64 MAJOR(__entry->sb_dev), MINOR(__entry->sb_dev),
65 __entry->nr_pages,
66 __entry->sync_mode,
67 __entry->for_kupdate,
68 __entry->range_cyclic,
69 __entry->for_background,
70 __print_symbolic(__entry->reason, WB_WORK_REASON)
71 )
72 );
73 #define DEFINE_WRITEBACK_WORK_EVENT(name) \
74 DEFINE_EVENT(writeback_work_class, name, \
75 TP_PROTO(struct backing_dev_info *bdi, struct wb_writeback_work *work), \
76 TP_ARGS(bdi, work))
77 DEFINE_WRITEBACK_WORK_EVENT(writeback_nothread);
78 DEFINE_WRITEBACK_WORK_EVENT(writeback_queue);
79 DEFINE_WRITEBACK_WORK_EVENT(writeback_exec);
80 DEFINE_WRITEBACK_WORK_EVENT(writeback_start);
81 DEFINE_WRITEBACK_WORK_EVENT(writeback_written);
82 DEFINE_WRITEBACK_WORK_EVENT(writeback_wait);
83
84 TRACE_EVENT(writeback_pages_written,
85 TP_PROTO(long pages_written),
86 TP_ARGS(pages_written),
87 TP_STRUCT__entry(
88 __field(long, pages)
89 ),
90 TP_fast_assign(
91 __entry->pages = pages_written;
92 ),
93 TP_printk("%ld", __entry->pages)
94 );
95
96 DECLARE_EVENT_CLASS(writeback_class,
97 TP_PROTO(struct backing_dev_info *bdi),
98 TP_ARGS(bdi),
99 TP_STRUCT__entry(
100 __array(char, name, 32)
101 ),
102 TP_fast_assign(
103 strncpy(__entry->name, dev_name(bdi->dev), 32);
104 ),
105 TP_printk("bdi %s",
106 __entry->name
107 )
108 );
109 #define DEFINE_WRITEBACK_EVENT(name) \
110 DEFINE_EVENT(writeback_class, name, \
111 TP_PROTO(struct backing_dev_info *bdi), \
112 TP_ARGS(bdi))
113
114 DEFINE_WRITEBACK_EVENT(writeback_nowork);
115 DEFINE_WRITEBACK_EVENT(writeback_wake_background);
116 DEFINE_WRITEBACK_EVENT(writeback_wake_thread);
117 DEFINE_WRITEBACK_EVENT(writeback_wake_forker_thread);
118 DEFINE_WRITEBACK_EVENT(writeback_bdi_register);
119 DEFINE_WRITEBACK_EVENT(writeback_bdi_unregister);
120 DEFINE_WRITEBACK_EVENT(writeback_thread_start);
121 DEFINE_WRITEBACK_EVENT(writeback_thread_stop);
122
123 DECLARE_EVENT_CLASS(wbc_class,
124 TP_PROTO(struct writeback_control *wbc, struct backing_dev_info *bdi),
125 TP_ARGS(wbc, bdi),
126 TP_STRUCT__entry(
127 __array(char, name, 32)
128 __field(long, nr_to_write)
129 __field(long, pages_skipped)
130 __field(int, sync_mode)
131 __field(int, for_kupdate)
132 __field(int, for_background)
133 __field(int, for_reclaim)
134 __field(int, range_cyclic)
135 __field(long, range_start)
136 __field(long, range_end)
137 ),
138
139 TP_fast_assign(
140 strncpy(__entry->name, dev_name(bdi->dev), 32);
141 __entry->nr_to_write = wbc->nr_to_write;
142 __entry->pages_skipped = wbc->pages_skipped;
143 __entry->sync_mode = wbc->sync_mode;
144 __entry->for_kupdate = wbc->for_kupdate;
145 __entry->for_background = wbc->for_background;
146 __entry->for_reclaim = wbc->for_reclaim;
147 __entry->range_cyclic = wbc->range_cyclic;
148 __entry->range_start = (long)wbc->range_start;
149 __entry->range_end = (long)wbc->range_end;
150 ),
151
152 TP_printk("bdi %s: towrt=%ld skip=%ld mode=%d kupd=%d "
153 "bgrd=%d reclm=%d cyclic=%d "
154 "start=0x%lx end=0x%lx",
155 __entry->name,
156 __entry->nr_to_write,
157 __entry->pages_skipped,
158 __entry->sync_mode,
159 __entry->for_kupdate,
160 __entry->for_background,
161 __entry->for_reclaim,
162 __entry->range_cyclic,
163 __entry->range_start,
164 __entry->range_end)
165 )
166
167 #define DEFINE_WBC_EVENT(name) \
168 DEFINE_EVENT(wbc_class, name, \
169 TP_PROTO(struct writeback_control *wbc, struct backing_dev_info *bdi), \
170 TP_ARGS(wbc, bdi))
171 DEFINE_WBC_EVENT(wbc_writepage);
172
173 TRACE_EVENT(writeback_queue_io,
174 TP_PROTO(struct bdi_writeback *wb,
175 struct wb_writeback_work *work,
176 int moved),
177 TP_ARGS(wb, work, moved),
178 TP_STRUCT__entry(
179 __array(char, name, 32)
180 __field(unsigned long, older)
181 __field(long, age)
182 __field(int, moved)
183 __field(int, reason)
184 ),
185 TP_fast_assign(
186 unsigned long *older_than_this = work->older_than_this;
187 strncpy(__entry->name, dev_name(wb->bdi->dev), 32);
188 __entry->older = older_than_this ? *older_than_this : 0;
189 __entry->age = older_than_this ?
190 (jiffies - *older_than_this) * 1000 / HZ : -1;
191 __entry->moved = moved;
192 __entry->reason = work->reason;
193 ),
194 TP_printk("bdi %s: older=%lu age=%ld enqueue=%d reason=%s",
195 __entry->name,
196 __entry->older, /* older_than_this in jiffies */
197 __entry->age, /* older_than_this in relative milliseconds */
198 __entry->moved,
199 __print_symbolic(__entry->reason, WB_WORK_REASON)
200 )
201 );
202
203 TRACE_EVENT(global_dirty_state,
204
205 TP_PROTO(unsigned long background_thresh,
206 unsigned long dirty_thresh
207 ),
208
209 TP_ARGS(background_thresh,
210 dirty_thresh
211 ),
212
213 TP_STRUCT__entry(
214 __field(unsigned long, nr_dirty)
215 __field(unsigned long, nr_writeback)
216 __field(unsigned long, nr_unstable)
217 __field(unsigned long, background_thresh)
218 __field(unsigned long, dirty_thresh)
219 __field(unsigned long, dirty_limit)
220 __field(unsigned long, nr_dirtied)
221 __field(unsigned long, nr_written)
222 ),
223
224 TP_fast_assign(
225 __entry->nr_dirty = global_page_state(NR_FILE_DIRTY);
226 __entry->nr_writeback = global_page_state(NR_WRITEBACK);
227 __entry->nr_unstable = global_page_state(NR_UNSTABLE_NFS);
228 __entry->nr_dirtied = global_page_state(NR_DIRTIED);
229 __entry->nr_written = global_page_state(NR_WRITTEN);
230 __entry->background_thresh = background_thresh;
231 __entry->dirty_thresh = dirty_thresh;
232 __entry->dirty_limit = global_dirty_limit;
233 ),
234
235 TP_printk("dirty=%lu writeback=%lu unstable=%lu "
236 "bg_thresh=%lu thresh=%lu limit=%lu "
237 "dirtied=%lu written=%lu",
238 __entry->nr_dirty,
239 __entry->nr_writeback,
240 __entry->nr_unstable,
241 __entry->background_thresh,
242 __entry->dirty_thresh,
243 __entry->dirty_limit,
244 __entry->nr_dirtied,
245 __entry->nr_written
246 )
247 );
248
249 #define KBps(x) ((x) << (PAGE_SHIFT - 10))
250
251 TRACE_EVENT(bdi_dirty_ratelimit,
252
253 TP_PROTO(struct backing_dev_info *bdi,
254 unsigned long dirty_rate,
255 unsigned long task_ratelimit),
256
257 TP_ARGS(bdi, dirty_rate, task_ratelimit),
258
259 TP_STRUCT__entry(
260 __array(char, bdi, 32)
261 __field(unsigned long, write_bw)
262 __field(unsigned long, avg_write_bw)
263 __field(unsigned long, dirty_rate)
264 __field(unsigned long, dirty_ratelimit)
265 __field(unsigned long, task_ratelimit)
266 __field(unsigned long, balanced_dirty_ratelimit)
267 ),
268
269 TP_fast_assign(
270 strlcpy(__entry->bdi, dev_name(bdi->dev), 32);
271 __entry->write_bw = KBps(bdi->write_bandwidth);
272 __entry->avg_write_bw = KBps(bdi->avg_write_bandwidth);
273 __entry->dirty_rate = KBps(dirty_rate);
274 __entry->dirty_ratelimit = KBps(bdi->dirty_ratelimit);
275 __entry->task_ratelimit = KBps(task_ratelimit);
276 __entry->balanced_dirty_ratelimit =
277 KBps(bdi->balanced_dirty_ratelimit);
278 ),
279
280 TP_printk("bdi %s: "
281 "write_bw=%lu awrite_bw=%lu dirty_rate=%lu "
282 "dirty_ratelimit=%lu task_ratelimit=%lu "
283 "balanced_dirty_ratelimit=%lu",
284 __entry->bdi,
285 __entry->write_bw, /* write bandwidth */
286 __entry->avg_write_bw, /* avg write bandwidth */
287 __entry->dirty_rate, /* bdi dirty rate */
288 __entry->dirty_ratelimit, /* base ratelimit */
289 __entry->task_ratelimit, /* ratelimit with position control */
290 __entry->balanced_dirty_ratelimit /* the balanced ratelimit */
291 )
292 );
293
294 TRACE_EVENT(balance_dirty_pages,
295
296 TP_PROTO(struct backing_dev_info *bdi,
297 unsigned long thresh,
298 unsigned long bg_thresh,
299 unsigned long dirty,
300 unsigned long bdi_thresh,
301 unsigned long bdi_dirty,
302 unsigned long dirty_ratelimit,
303 unsigned long task_ratelimit,
304 unsigned long dirtied,
305 unsigned long period,
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, period, 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 __field(unsigned long, period)
327 __field( long, think)
328 ),
329
330 TP_fast_assign(
331 unsigned long freerun = (thresh + bg_thresh) / 2;
332 strlcpy(__entry->bdi, dev_name(bdi->dev), 32);
333
334 __entry->limit = global_dirty_limit;
335 __entry->setpoint = (global_dirty_limit + freerun) / 2;
336 __entry->dirty = dirty;
337 __entry->bdi_setpoint = __entry->setpoint *
338 bdi_thresh / (thresh + 1);
339 __entry->bdi_dirty = bdi_dirty;
340 __entry->dirty_ratelimit = KBps(dirty_ratelimit);
341 __entry->task_ratelimit = KBps(task_ratelimit);
342 __entry->dirtied = dirtied;
343 __entry->dirtied_pause = current->nr_dirtied_pause;
344 __entry->think = current->dirty_paused_when == 0 ? 0 :
345 (long)(jiffies - current->dirty_paused_when) * 1000/HZ;
346 __entry->period = period * 1000 / HZ;
347 __entry->pause = pause * 1000 / HZ;
348 __entry->paused = (jiffies - start_time) * 1000 / HZ;
349 ),
350
351
352 TP_printk("bdi %s: "
353 "limit=%lu setpoint=%lu dirty=%lu "
354 "bdi_setpoint=%lu bdi_dirty=%lu "
355 "dirty_ratelimit=%lu task_ratelimit=%lu "
356 "dirtied=%u dirtied_pause=%u "
357 "paused=%lu pause=%ld period=%lu think=%ld",
358 __entry->bdi,
359 __entry->limit,
360 __entry->setpoint,
361 __entry->dirty,
362 __entry->bdi_setpoint,
363 __entry->bdi_dirty,
364 __entry->dirty_ratelimit,
365 __entry->task_ratelimit,
366 __entry->dirtied,
367 __entry->dirtied_pause,
368 __entry->paused, /* ms */
369 __entry->pause, /* ms */
370 __entry->period, /* ms */
371 __entry->think /* ms */
372 )
373 );
374
375 TRACE_EVENT(writeback_sb_inodes_requeue,
376
377 TP_PROTO(struct inode *inode),
378 TP_ARGS(inode),
379
380 TP_STRUCT__entry(
381 __array(char, name, 32)
382 __field(unsigned long, ino)
383 __field(unsigned long, state)
384 __field(unsigned long, dirtied_when)
385 ),
386
387 TP_fast_assign(
388 strncpy(__entry->name,
389 dev_name(inode_to_bdi(inode)->dev), 32);
390 __entry->ino = inode->i_ino;
391 __entry->state = inode->i_state;
392 __entry->dirtied_when = inode->dirtied_when;
393 ),
394
395 TP_printk("bdi %s: ino=%lu state=%s dirtied_when=%lu age=%lu",
396 __entry->name,
397 __entry->ino,
398 show_inode_state(__entry->state),
399 __entry->dirtied_when,
400 (jiffies - __entry->dirtied_when) / HZ
401 )
402 );
403
404 DECLARE_EVENT_CLASS(writeback_congest_waited_template,
405
406 TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed),
407
408 TP_ARGS(usec_timeout, usec_delayed),
409
410 TP_STRUCT__entry(
411 __field( unsigned int, usec_timeout )
412 __field( unsigned int, usec_delayed )
413 ),
414
415 TP_fast_assign(
416 __entry->usec_timeout = usec_timeout;
417 __entry->usec_delayed = usec_delayed;
418 ),
419
420 TP_printk("usec_timeout=%u usec_delayed=%u",
421 __entry->usec_timeout,
422 __entry->usec_delayed)
423 );
424
425 DEFINE_EVENT(writeback_congest_waited_template, writeback_congestion_wait,
426
427 TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed),
428
429 TP_ARGS(usec_timeout, usec_delayed)
430 );
431
432 DEFINE_EVENT(writeback_congest_waited_template, writeback_wait_iff_congested,
433
434 TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed),
435
436 TP_ARGS(usec_timeout, usec_delayed)
437 );
438
439 DECLARE_EVENT_CLASS(writeback_single_inode_template,
440
441 TP_PROTO(struct inode *inode,
442 struct writeback_control *wbc,
443 unsigned long nr_to_write
444 ),
445
446 TP_ARGS(inode, wbc, nr_to_write),
447
448 TP_STRUCT__entry(
449 __array(char, name, 32)
450 __field(unsigned long, ino)
451 __field(unsigned long, state)
452 __field(unsigned long, dirtied_when)
453 __field(unsigned long, writeback_index)
454 __field(long, nr_to_write)
455 __field(unsigned long, wrote)
456 ),
457
458 TP_fast_assign(
459 strncpy(__entry->name,
460 dev_name(inode_to_bdi(inode)->dev), 32);
461 __entry->ino = inode->i_ino;
462 __entry->state = inode->i_state;
463 __entry->dirtied_when = inode->dirtied_when;
464 __entry->writeback_index = inode->i_mapping->writeback_index;
465 __entry->nr_to_write = nr_to_write;
466 __entry->wrote = nr_to_write - wbc->nr_to_write;
467 ),
468
469 TP_printk("bdi %s: ino=%lu state=%s dirtied_when=%lu age=%lu "
470 "index=%lu to_write=%ld wrote=%lu",
471 __entry->name,
472 __entry->ino,
473 show_inode_state(__entry->state),
474 __entry->dirtied_when,
475 (jiffies - __entry->dirtied_when) / HZ,
476 __entry->writeback_index,
477 __entry->nr_to_write,
478 __entry->wrote
479 )
480 );
481
482 DEFINE_EVENT(writeback_single_inode_template, writeback_single_inode,
483 TP_PROTO(struct inode *inode,
484 struct writeback_control *wbc,
485 unsigned long nr_to_write),
486 TP_ARGS(inode, wbc, nr_to_write)
487 );
488
489 #endif /* _TRACE_WRITEBACK_H */
490
491 /* This part must be outside protection */
492 #include <trace/define_trace.h>
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