1 #define NETDATA_RRD_INTERNALS 1
4 #define RRD_DEFAULT_GAP_INTERPOLATIONS 1
6 // ----------------------------------------------------------------------------
9 int rrdset_compare(void* a, void* b) {
10 if(((RRDSET *)a)->hash < ((RRDSET *)b)->hash) return -1;
11 else if(((RRDSET *)a)->hash > ((RRDSET *)b)->hash) return 1;
12 else return strcmp(((RRDSET *)a)->id, ((RRDSET *)b)->id);
15 static RRDSET *rrdset_index_find(RRDHOST *host, const char *id, uint32_t hash) {
17 strncpyz(tmp.id, id, RRD_ID_LENGTH_MAX);
18 tmp.hash = (hash)?hash:simple_hash(tmp.id);
20 return (RRDSET *)avl_search_lock(&(host->rrdset_root_index), (avl *) &tmp);
23 // ----------------------------------------------------------------------------
26 #define rrdset_from_avlname(avlname_ptr) ((RRDSET *)((avlname_ptr) - offsetof(RRDSET, avlname)))
28 int rrdset_compare_name(void* a, void* b) {
29 RRDSET *A = rrdset_from_avlname(a);
30 RRDSET *B = rrdset_from_avlname(b);
32 // fprintf(stderr, "COMPARING: %s with %s\n", A->name, B->name);
34 if(A->hash_name < B->hash_name) return -1;
35 else if(A->hash_name > B->hash_name) return 1;
36 else return strcmp(A->name, B->name);
39 RRDSET *rrdset_index_add_name(RRDHOST *host, RRDSET *st) {
41 // fprintf(stderr, "ADDING: %s (name: %s)\n", st->id, st->name);
42 result = avl_insert_lock(&host->rrdset_root_index_name, (avl *) (&st->avlname));
43 if(result) return rrdset_from_avlname(result);
47 RRDSET *rrdset_index_del_name(RRDHOST *host, RRDSET *st) {
49 // fprintf(stderr, "DELETING: %s (name: %s)\n", st->id, st->name);
50 result = (RRDSET *)avl_remove_lock(&((host)->rrdset_root_index_name), (avl *)(&st->avlname));
51 if(result) return rrdset_from_avlname(result);
56 // ----------------------------------------------------------------------------
57 // RRDSET - find charts
59 static inline RRDSET *rrdset_index_find_name(RRDHOST *host, const char *name, uint32_t hash) {
63 tmp.hash_name = (hash)?hash:simple_hash(tmp.name);
65 // fprintf(stderr, "SEARCHING: %s\n", name);
66 result = avl_search_lock(&host->rrdset_root_index_name, (avl *) (&(tmp.avlname)));
68 RRDSET *st = rrdset_from_avlname(result);
69 if(strcmp(st->magic, RRDSET_MAGIC))
70 error("Search for RRDSET %s returned an invalid RRDSET %s (name %s)", name, st->id, st->name);
72 // fprintf(stderr, "FOUND: %s\n", name);
73 return rrdset_from_avlname(result);
75 // fprintf(stderr, "NOT FOUND: %s\n", name);
79 inline RRDSET *rrdset_find(RRDHOST *host, const char *id) {
80 debug(D_RRD_CALLS, "rrdset_find() for chart '%s' in host '%s'", id, host->hostname);
81 RRDSET *st = rrdset_index_find(host, id, 0);
85 inline RRDSET *rrdset_find_bytype(RRDHOST *host, const char *type, const char *id) {
86 debug(D_RRD_CALLS, "rrdset_find_bytype() for chart '%s.%s' in host '%s'", type, id, host->hostname);
88 char buf[RRD_ID_LENGTH_MAX + 1];
89 strncpyz(buf, type, RRD_ID_LENGTH_MAX - 1);
91 int len = (int) strlen(buf);
92 strncpyz(&buf[len], id, (size_t) (RRD_ID_LENGTH_MAX - len));
94 return(rrdset_find(host, buf));
97 inline RRDSET *rrdset_find_byname(RRDHOST *host, const char *name) {
98 debug(D_RRD_CALLS, "rrdset_find_byname() for chart '%s' in host '%s'", name, host->hostname);
99 RRDSET *st = rrdset_index_find_name(host, name, 0);
104 // ----------------------------------------------------------------------------
105 // RRDSET - rename charts
107 char *rrdset_strncpyz_name(char *to, const char *from, size_t length) {
110 while (length-- && (c = *from++)) {
111 if(c != '.' && !isalnum(c))
122 void rrdset_set_name(RRDSET *st, const char *name) {
123 if(unlikely(st->name && !strcmp(st->name, name)))
126 debug(D_RRD_CALLS, "rrdset_set_name() old: %s, new: %s", st->name, name);
128 char b[CONFIG_MAX_VALUE + 1];
129 char n[RRD_ID_LENGTH_MAX + 1];
131 snprintfz(n, RRD_ID_LENGTH_MAX, "%s.%s", st->type, name);
132 rrdset_strncpyz_name(b, n, CONFIG_MAX_VALUE);
135 rrdset_index_del_name(st->rrdhost, st);
136 st->name = config_set_default(st->id, "name", b);
137 st->hash_name = simple_hash(st->name);
138 rrdsetvar_rename_all(st);
141 st->name = config_get(st->id, "name", b);
142 st->hash_name = simple_hash(st->name);
145 pthread_rwlock_wrlock(&st->rwlock);
147 for(rd = st->dimensions; rd ;rd = rd->next)
148 rrddimvar_rename_all(rd);
149 pthread_rwlock_unlock(&st->rwlock);
151 if(unlikely(rrdset_index_add_name(st->rrdhost, st) != st))
152 error("RRDSET: INTERNAL ERROR: attempted to index duplicate chart name '%s'", st->name);
156 // ----------------------------------------------------------------------------
157 // RRDSET - reset a chart
159 void rrdset_reset(RRDSET *st) {
160 debug(D_RRD_CALLS, "rrdset_reset() %s", st->name);
162 st->last_collected_time.tv_sec = 0;
163 st->last_collected_time.tv_usec = 0;
164 st->last_updated.tv_sec = 0;
165 st->last_updated.tv_usec = 0;
166 st->current_entry = 0;
168 st->counter_done = 0;
171 for(rd = st->dimensions; rd ; rd = rd->next) {
172 rd->last_collected_time.tv_sec = 0;
173 rd->last_collected_time.tv_usec = 0;
175 memset(rd->values, 0, rd->entries * sizeof(storage_number));
179 // ----------------------------------------------------------------------------
180 // RRDSET - helpers for rrdset_create()
182 static inline long align_entries_to_pagesize(long entries) {
183 if(entries < 5) entries = 5;
184 if(entries > RRD_HISTORY_ENTRIES_MAX) entries = RRD_HISTORY_ENTRIES_MAX;
186 #ifdef NETDATA_LOG_ALLOCATIONS
187 long page = (size_t)sysconf(_SC_PAGESIZE);
189 long size = sizeof(RRDDIM) + entries * sizeof(storage_number);
191 size -= (size % page);
194 long n = (size - sizeof(RRDDIM)) / sizeof(storage_number);
204 static inline void timeval_align(struct timeval *tv, int update_every) {
205 tv->tv_sec -= tv->tv_sec % update_every;
206 tv->tv_usec = 500000;
209 // ----------------------------------------------------------------------------
210 // RRDSET - create a chart
212 RRDSET *rrdset_create(RRDHOST *host, const char *type, const char *id, const char *name, const char *family
213 , const char *context, const char *title, const char *units, long priority
214 , int update_every, int chart_type) {
216 if(!type || !type[0]) {
217 fatal("Cannot create rrd stats without a type.");
222 fatal("Cannot create rrd stats without an id.");
226 char fullid[RRD_ID_LENGTH_MAX + 1];
227 char fullfilename[FILENAME_MAX + 1];
229 snprintfz(fullid, RRD_ID_LENGTH_MAX, "%s.%s", type, id);
231 RRDSET *st = rrdset_find(host, fullid);
233 debug(D_RRD_CALLS, "RRDSET '%s', already exists.", fullid);
237 long rentries = config_get_number(fullid, "history", rrd_default_history_entries);
238 long entries = align_entries_to_pagesize(rentries);
239 if(entries != rentries) entries = config_set_number(fullid, "history", entries);
241 int enabled = config_get_boolean(fullid, "enabled", 1);
242 if(!enabled) entries = 5;
244 unsigned long size = sizeof(RRDSET);
245 char *cache_dir = rrdset_cache_dir(host, fullid);
247 debug(D_RRD_CALLS, "Creating RRD_STATS for '%s.%s'.", type, id);
249 snprintfz(fullfilename, FILENAME_MAX, "%s/main.db", cache_dir);
250 if(host->rrd_memory_mode != RRD_MEMORY_MODE_RAM) st = (RRDSET *)mymmap(fullfilename, size, ((host->rrd_memory_mode == RRD_MEMORY_MODE_MAP)?MAP_SHARED:MAP_PRIVATE), 0);
252 if(strcmp(st->magic, RRDSET_MAGIC) != 0) {
254 info("Initializing file %s.", fullfilename);
257 else if(strcmp(st->id, fullid) != 0) {
259 error("File %s contents are not for chart %s. Clearing it.", fullfilename, fullid);
264 else if(st->memsize != size || st->entries != entries) {
266 error("File %s does not have the desired size. Clearing it.", fullfilename);
269 else if(st->update_every != update_every) {
271 error("File %s does not have the desired update frequency. Clearing it.", fullfilename);
274 else if((now_realtime_sec() - st->last_updated.tv_sec) > update_every * entries) {
276 error("File %s is too old. Clearing it.", fullfilename);
280 // make sure the database is aligned
281 if(st->last_updated.tv_sec)
282 timeval_align(&st->last_updated, update_every);
292 st->dimensions = NULL;
294 st->mapped = host->rrd_memory_mode;
295 st->variables = NULL;
297 memset(&st->rwlock, 0, sizeof(pthread_rwlock_t));
298 memset(&st->avl, 0, sizeof(avl));
299 memset(&st->avlname, 0, sizeof(avl));
300 memset(&st->variables_root_index, 0, sizeof(avl_tree_lock));
301 memset(&st->dimensions_index, 0, sizeof(avl_tree_lock));
304 st = callocz(1, size);
305 st->mapped = RRD_MEMORY_MODE_RAM;
310 st->entries = entries;
311 st->update_every = update_every;
313 if(st->current_entry >= st->entries) st->current_entry = 0;
315 strcpy(st->cache_filename, fullfilename);
316 strcpy(st->magic, RRDSET_MAGIC);
318 strcpy(st->id, fullid);
319 st->hash = simple_hash(st->id);
321 st->cache_dir = cache_dir;
323 st->chart_type = rrdset_type_id(config_get(st->id, "chart type", rrdset_type_name(chart_type)));
324 st->type = config_get(st->id, "type", type);
325 st->family = config_get(st->id, "family", family?family:st->type);
326 st->units = config_get(st->id, "units", units?units:"");
328 st->context = config_get(st->id, "context", context?context:st->id);
329 st->hash_context = simple_hash(st->context);
331 st->priority = config_get_number(st->id, "priority", priority);
332 st->enabled = enabled;
337 // if(!strcmp(st->id, "disk_util.dm-0")) {
339 // error("enabled debugging for '%s'", st->id);
341 // else error("not enabled debugging for '%s'", st->id);
346 st->last_collected_time.tv_sec = 0;
347 st->last_collected_time.tv_usec = 0;
348 st->counter_done = 0;
350 st->gap_when_lost_iterations_above = (int) (
351 config_get_number(st->id, "gap when lost iterations above", RRD_DEFAULT_GAP_INTERPOLATIONS) + 2);
353 avl_init_lock(&st->dimensions_index, rrddim_compare);
354 avl_init_lock(&st->variables_root_index, rrdvar_compare);
356 pthread_rwlock_init(&st->rwlock, NULL);
357 rrdhost_rwlock(host);
359 if(name && *name) rrdset_set_name(st, name);
360 else rrdset_set_name(st, id);
363 char varvalue[CONFIG_MAX_VALUE + 1];
364 char varvalue2[CONFIG_MAX_VALUE + 1];
365 snprintfz(varvalue, CONFIG_MAX_VALUE, "%s (%s)", title?title:"", st->name);
366 json_escape_string(varvalue2, varvalue, sizeof(varvalue2));
367 st->title = config_get(st->id, "title", varvalue2);
370 st->rrdfamily = rrdfamily_create(host, st->family);
372 st->next = host->rrdset_root;
373 host->rrdset_root = st;
375 if(host->health_enabled) {
376 rrdsetvar_create(st, "last_collected_t", RRDVAR_TYPE_TIME_T, &st->last_collected_time.tv_sec, 0);
377 rrdsetvar_create(st, "collected_total_raw", RRDVAR_TYPE_TOTAL, &st->last_collected_total, 0);
378 rrdsetvar_create(st, "green", RRDVAR_TYPE_CALCULATED, &st->green, 0);
379 rrdsetvar_create(st, "red", RRDVAR_TYPE_CALCULATED, &st->red, 0);
380 rrdsetvar_create(st, "update_every", RRDVAR_TYPE_INT, &st->update_every, 0);
383 if(unlikely(rrdset_index_add(host, st) != st))
384 error("RRDSET: INTERNAL ERROR: attempt to index duplicate chart '%s'", st->id);
386 rrdsetcalc_link_matching(st);
387 rrdcalctemplate_link_matching(st);
389 rrdhost_unlock(host);
395 // ----------------------------------------------------------------------------
396 // RRDSET - data collection iteration control
398 void rrdset_next_usec_unfiltered(RRDSET *st, usec_t microseconds) {
399 if(unlikely(!st->last_collected_time.tv_sec || !microseconds)) {
401 microseconds = st->update_every * USEC_PER_SEC;
403 st->usec_since_last_update = microseconds;
406 void rrdset_next_usec(RRDSET *st, usec_t microseconds)
409 now_realtime_timeval(&now);
411 if(unlikely(!st->last_collected_time.tv_sec)) {
413 microseconds = st->update_every * USEC_PER_SEC;
415 else if(unlikely(!microseconds)) {
416 // no dt given by the plugin
417 microseconds = dt_usec(&now, &st->last_collected_time);
420 // microseconds has the time since the last collection
421 #ifdef NETDATA_INTERNAL_CHECKS
422 usec_t now_usec = timeval_usec(&now);
423 usec_t last_usec = timeval_usec(&st->last_collected_time);
425 usec_t since_last_usec = dt_usec(&now, &st->last_collected_time);
427 // verify the microseconds given is good
428 if(unlikely(microseconds > since_last_usec)) {
429 debug(D_RRD_CALLS, "dt %llu usec given is too big - it leads %llu usec to the future, for chart '%s' (%s).", microseconds, microseconds - since_last_usec, st->name, st->id);
431 #ifdef NETDATA_INTERNAL_CHECKS
432 if(unlikely(last_usec + microseconds > now_usec + 1000))
433 error("dt %llu usec given is too big - it leads %llu usec to the future, for chart '%s' (%s).", microseconds, microseconds - since_last_usec, st->name, st->id);
436 microseconds = since_last_usec;
438 else if(unlikely(microseconds < since_last_usec * 0.8)) {
439 debug(D_RRD_CALLS, "dt %llu usec given is too small - expected %llu usec up to -20%%, for chart '%s' (%s).", microseconds, since_last_usec, st->name, st->id);
441 #ifdef NETDATA_INTERNAL_CHECKS
442 error("dt %llu usec given is too small - expected %llu usec up to -20%%, for chart '%s' (%s).", microseconds, since_last_usec, st->name, st->id);
444 microseconds = since_last_usec;
447 debug(D_RRD_CALLS, "rrdset_next_usec() for chart %s with microseconds %llu", st->name, microseconds);
449 if(unlikely(st->debug)) debug(D_RRD_STATS, "%s: NEXT: %llu microseconds", st->name, microseconds);
450 st->usec_since_last_update = microseconds;
454 // ----------------------------------------------------------------------------
455 // RRDSET - process the collected values for all dimensions of a chart
457 usec_t rrdset_done(RRDSET *st) {
458 if(unlikely(netdata_exit)) return 0;
460 debug(D_RRD_CALLS, "rrdset_done() for chart %s", st->name);
465 pthreadoldcancelstate; // store the old cancelable pthread state, to restore it at the end
468 store_this_entry = 1, // boolean: 1 = store this entry, 0 = don't store this entry
469 first_entry = 0; // boolean: 1 = this is the first entry seen for this chart, 0 = all other entries
472 stored_entries = 0; // the number of entries we have stored in the db, during this call to rrdset_done()
475 last_collect_ut, // the timestamp in microseconds, of the last collected value
476 now_collect_ut, // the timestamp in microseconds, of this collected value (this is NOW)
477 last_stored_ut, // the timestamp in microseconds, of the last stored entry in the db
478 next_store_ut, // the timestamp in microseconds, of the next entry to store in the db
479 update_every_ut = st->update_every * USEC_PER_SEC; // st->update_every in microseconds
481 if(unlikely(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &pthreadoldcancelstate) != 0))
482 error("Cannot set pthread cancel state to DISABLE.");
484 // a read lock is OK here
485 pthread_rwlock_rdlock(&st->rwlock);
488 // enable the chart, if it was disabled
489 if(unlikely(rrd_delete_unupdated_dimensions) && !st->enabled)
493 // check if the chart has a long time to be updated
494 if(unlikely(st->usec_since_last_update > st->entries * update_every_ut)) {
495 info("%s: took too long to be updated (%0.3Lf secs). Resetting it.", st->name, (long double)(st->usec_since_last_update / 1000000.0));
497 st->usec_since_last_update = update_every_ut;
500 if(unlikely(st->debug)) debug(D_RRD_STATS, "%s: microseconds since last update: %llu", st->name, st->usec_since_last_update);
502 // set last_collected_time
503 if(unlikely(!st->last_collected_time.tv_sec)) {
504 // it is the first entry
505 // set the last_collected_time to now
506 now_realtime_timeval(&st->last_collected_time);
507 timeval_align(&st->last_collected_time, st->update_every);
509 last_collect_ut = st->last_collected_time.tv_sec * USEC_PER_SEC + st->last_collected_time.tv_usec - update_every_ut;
511 // the first entry should not be stored
512 store_this_entry = 0;
515 if(unlikely(st->debug)) debug(D_RRD_STATS, "%s: has not set last_collected_time. Setting it now. Will not store the next entry.", st->name);
518 // it is not the first entry
519 // calculate the proper last_collected_time, using usec_since_last_update
520 last_collect_ut = st->last_collected_time.tv_sec * USEC_PER_SEC + st->last_collected_time.tv_usec;
521 usec_t ut = last_collect_ut + st->usec_since_last_update;
522 st->last_collected_time.tv_sec = (time_t) (ut / USEC_PER_SEC);
523 st->last_collected_time.tv_usec = (suseconds_t) (ut % USEC_PER_SEC);
526 // if this set has not been updated in the past
527 // we fake the last_update time to be = now - usec_since_last_update
528 if(unlikely(!st->last_updated.tv_sec)) {
529 // it has never been updated before
530 // set a fake last_updated, in the past using usec_since_last_update
531 usec_t ut = st->last_collected_time.tv_sec * USEC_PER_SEC + st->last_collected_time.tv_usec - st->usec_since_last_update;
532 st->last_updated.tv_sec = (time_t) (ut / USEC_PER_SEC);
533 st->last_updated.tv_usec = (suseconds_t) (ut % USEC_PER_SEC);
535 // the first entry should not be stored
536 store_this_entry = 0;
539 if(unlikely(st->debug)) debug(D_RRD_STATS, "%s: initializing last_updated to now - %llu microseconds (%0.3Lf). Will not store the next entry.", st->name, st->usec_since_last_update, (long double)ut/1000000.0);
542 // check if we will re-write the entire data set
543 if(unlikely(dt_usec(&st->last_collected_time, &st->last_updated) > st->entries * update_every_ut)) {
544 info("%s: too old data (last updated at %ld.%ld, last collected at %ld.%ld). Resetting it. Will not store the next entry.", st->name, st->last_updated.tv_sec, st->last_updated.tv_usec, st->last_collected_time.tv_sec, st->last_collected_time.tv_usec);
547 st->usec_since_last_update = update_every_ut;
549 now_realtime_timeval(&st->last_collected_time);
550 timeval_align(&st->last_collected_time, st->update_every);
552 usec_t ut = st->last_collected_time.tv_sec * USEC_PER_SEC + st->last_collected_time.tv_usec - st->usec_since_last_update;
553 st->last_updated.tv_sec = (time_t) (ut / USEC_PER_SEC);
554 st->last_updated.tv_usec = (suseconds_t) (ut % USEC_PER_SEC);
556 // the first entry should not be stored
557 store_this_entry = 0;
561 // these are the 3 variables that will help us in interpolation
562 // last_stored_ut = the last time we added a value to the storage
563 // now_collect_ut = the time the current value has been collected
564 // next_store_ut = the time of the next interpolation point
565 last_stored_ut = st->last_updated.tv_sec * USEC_PER_SEC + st->last_updated.tv_usec;
566 now_collect_ut = st->last_collected_time.tv_sec * USEC_PER_SEC + st->last_collected_time.tv_usec;
567 next_store_ut = (st->last_updated.tv_sec + st->update_every) * USEC_PER_SEC;
569 if(unlikely(st->debug)) {
570 debug(D_RRD_STATS, "%s: last_collect_ut = %0.3Lf (last collection time)", st->name, (long double)last_collect_ut/1000000.0);
571 debug(D_RRD_STATS, "%s: now_collect_ut = %0.3Lf (current collection time)", st->name, (long double)now_collect_ut/1000000.0);
572 debug(D_RRD_STATS, "%s: last_stored_ut = %0.3Lf (last updated time)", st->name, (long double)last_stored_ut/1000000.0);
573 debug(D_RRD_STATS, "%s: next_store_ut = %0.3Lf (next interpolation point)", st->name, (long double)next_store_ut/1000000.0);
576 if(unlikely(!st->counter_done)) {
577 store_this_entry = 0;
578 if(unlikely(st->debug)) debug(D_RRD_STATS, "%s: Will not store the next entry.", st->name);
582 // calculate totals and count the dimensions
584 st->collected_total = 0;
585 for( rd = st->dimensions, dimensions = 0 ; rd ; rd = rd->next, dimensions++ )
586 if(likely(rrddim_flag_check(rd, RRDDIM_FLAG_UPDATED)))
587 st->collected_total += rd->collected_value;
589 uint32_t storage_flags = SN_EXISTS;
591 // process all dimensions to calculate their values
592 // based on the collected figures only
593 // at this stage we do not interpolate anything
594 for( rd = st->dimensions ; rd ; rd = rd->next ) {
596 if(unlikely(!rrddim_flag_check(rd, RRDDIM_FLAG_UPDATED))) {
597 rd->calculated_value = 0;
601 if(unlikely(st->debug)) debug(D_RRD_STATS, "%s/%s: START "
602 " last_collected_value = " COLLECTED_NUMBER_FORMAT
603 " collected_value = " COLLECTED_NUMBER_FORMAT
604 " last_calculated_value = " CALCULATED_NUMBER_FORMAT
605 " calculated_value = " CALCULATED_NUMBER_FORMAT
607 , rd->last_collected_value
608 , rd->collected_value
609 , rd->last_calculated_value
610 , rd->calculated_value
613 switch(rd->algorithm) {
614 case RRD_ALGORITHM_ABSOLUTE:
615 rd->calculated_value = (calculated_number)rd->collected_value
616 * (calculated_number)rd->multiplier
617 / (calculated_number)rd->divisor;
619 if(unlikely(st->debug))
620 debug(D_RRD_STATS, "%s/%s: CALC ABS/ABS-NO-IN "
621 CALCULATED_NUMBER_FORMAT " = "
622 COLLECTED_NUMBER_FORMAT
623 " * " CALCULATED_NUMBER_FORMAT
624 " / " CALCULATED_NUMBER_FORMAT
626 , rd->calculated_value
627 , rd->collected_value
628 , (calculated_number)rd->multiplier
629 , (calculated_number)rd->divisor
633 case RRD_ALGORITHM_PCENT_OVER_ROW_TOTAL:
634 if(unlikely(!st->collected_total))
635 rd->calculated_value = 0;
637 // the percentage of the current value
638 // over the total of all dimensions
639 rd->calculated_value =
640 (calculated_number)100
641 * (calculated_number)rd->collected_value
642 / (calculated_number)st->collected_total;
644 if(unlikely(st->debug))
645 debug(D_RRD_STATS, "%s/%s: CALC PCENT-ROW "
646 CALCULATED_NUMBER_FORMAT " = 100"
647 " * " COLLECTED_NUMBER_FORMAT
648 " / " COLLECTED_NUMBER_FORMAT
650 , rd->calculated_value
651 , rd->collected_value
652 , st->collected_total
656 case RRD_ALGORITHM_INCREMENTAL:
657 if(unlikely(rd->counter <= 1)) {
658 rd->calculated_value = 0;
662 // if the new is smaller than the old (an overflow, or reset), set the old equal to the new
663 // to reset the calculation (it will give zero as the calculation for this second)
664 if(unlikely(rd->last_collected_value > rd->collected_value)) {
665 debug(D_RRD_STATS, "%s.%s: RESET or OVERFLOW. Last collected value = " COLLECTED_NUMBER_FORMAT ", current = " COLLECTED_NUMBER_FORMAT
667 , rd->last_collected_value
668 , rd->collected_value);
670 if(!(rrddim_flag_check(rd, RRDDIM_FLAG_DONT_DETECT_RESETS_OR_OVERFLOWS)))
671 storage_flags = SN_EXISTS_RESET;
673 rd->last_collected_value = rd->collected_value;
676 rd->calculated_value +=
677 (calculated_number)(rd->collected_value - rd->last_collected_value)
678 * (calculated_number)rd->multiplier
679 / (calculated_number)rd->divisor;
681 if(unlikely(st->debug))
682 debug(D_RRD_STATS, "%s/%s: CALC INC PRE "
683 CALCULATED_NUMBER_FORMAT " = ("
684 COLLECTED_NUMBER_FORMAT " - " COLLECTED_NUMBER_FORMAT
686 " * " CALCULATED_NUMBER_FORMAT
687 " / " CALCULATED_NUMBER_FORMAT
689 , rd->calculated_value
690 , rd->collected_value, rd->last_collected_value
691 , (calculated_number)rd->multiplier
692 , (calculated_number)rd->divisor
696 case RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL:
697 if(unlikely(rd->counter <= 1)) {
698 rd->calculated_value = 0;
702 // if the new is smaller than the old (an overflow, or reset), set the old equal to the new
703 // to reset the calculation (it will give zero as the calculation for this second)
704 if(unlikely(rd->last_collected_value > rd->collected_value)) {
705 debug(D_RRD_STATS, "%s.%s: RESET or OVERFLOW. Last collected value = " COLLECTED_NUMBER_FORMAT ", current = " COLLECTED_NUMBER_FORMAT
707 , rd->last_collected_value
708 , rd->collected_value);
710 if(!(rrddim_flag_check(rd, RRDDIM_FLAG_DONT_DETECT_RESETS_OR_OVERFLOWS)))
711 storage_flags = SN_EXISTS_RESET;
713 rd->last_collected_value = rd->collected_value;
716 // the percentage of the current increment
717 // over the increment of all dimensions together
718 if(unlikely(st->collected_total == st->last_collected_total))
719 rd->calculated_value = 0;
721 rd->calculated_value =
722 (calculated_number)100
723 * (calculated_number)(rd->collected_value - rd->last_collected_value)
724 / (calculated_number)(st->collected_total - st->last_collected_total);
726 if(unlikely(st->debug))
727 debug(D_RRD_STATS, "%s/%s: CALC PCENT-DIFF "
728 CALCULATED_NUMBER_FORMAT " = 100"
729 " * (" COLLECTED_NUMBER_FORMAT " - " COLLECTED_NUMBER_FORMAT ")"
730 " / (" COLLECTED_NUMBER_FORMAT " - " COLLECTED_NUMBER_FORMAT ")"
732 , rd->calculated_value
733 , rd->collected_value, rd->last_collected_value
734 , st->collected_total, st->last_collected_total
739 // make the default zero, to make sure
740 // it gets noticed when we add new types
741 rd->calculated_value = 0;
743 if(unlikely(st->debug))
744 debug(D_RRD_STATS, "%s/%s: CALC "
745 CALCULATED_NUMBER_FORMAT " = 0"
747 , rd->calculated_value
752 if(unlikely(st->debug)) debug(D_RRD_STATS, "%s/%s: PHASE2 "
753 " last_collected_value = " COLLECTED_NUMBER_FORMAT
754 " collected_value = " COLLECTED_NUMBER_FORMAT
755 " last_calculated_value = " CALCULATED_NUMBER_FORMAT
756 " calculated_value = " CALCULATED_NUMBER_FORMAT
758 , rd->last_collected_value
759 , rd->collected_value
760 , rd->last_calculated_value
761 , rd->calculated_value
766 // at this point we have all the calculated values ready
767 // it is now time to interpolate values on a second boundary
769 if(unlikely(now_collect_ut < next_store_ut)) {
770 // this is collected in the same interpolation point
771 if(unlikely(st->debug)) debug(D_RRD_STATS, "%s: THIS IS IN THE SAME INTERPOLATION POINT", st->name);
772 #ifdef NETDATA_INTERNAL_CHECKS
773 info("%s is collected in the same interpolation point: short by %llu microseconds", st->name, next_store_ut - now_collect_ut);
777 usec_t first_ut = last_stored_ut;
778 long long iterations = (now_collect_ut - last_stored_ut) / (update_every_ut);
779 if((now_collect_ut % (update_every_ut)) == 0) iterations++;
781 for( ; next_store_ut <= now_collect_ut ; last_collect_ut = next_store_ut, next_store_ut += update_every_ut, iterations-- ) {
782 #ifdef NETDATA_INTERNAL_CHECKS
783 if(iterations < 0) { error("%s: iterations calculation wrapped! first_ut = %llu, last_stored_ut = %llu, next_store_ut = %llu, now_collect_ut = %llu", st->name, first_ut, last_stored_ut, next_store_ut, now_collect_ut); }
786 if(unlikely(st->debug)) {
787 debug(D_RRD_STATS, "%s: last_stored_ut = %0.3Lf (last updated time)", st->name, (long double)last_stored_ut/1000000.0);
788 debug(D_RRD_STATS, "%s: next_store_ut = %0.3Lf (next interpolation point)", st->name, (long double)next_store_ut/1000000.0);
791 st->last_updated.tv_sec = (time_t) (next_store_ut / USEC_PER_SEC);
792 st->last_updated.tv_usec = 0;
794 for( rd = st->dimensions ; likely(rd) ; rd = rd->next ) {
795 calculated_number new_value;
797 switch(rd->algorithm) {
798 case RRD_ALGORITHM_INCREMENTAL:
799 new_value = (calculated_number)
800 ( rd->calculated_value
801 * (calculated_number)(next_store_ut - last_collect_ut)
802 / (calculated_number)(now_collect_ut - last_collect_ut)
805 if(unlikely(st->debug))
806 debug(D_RRD_STATS, "%s/%s: CALC2 INC "
807 CALCULATED_NUMBER_FORMAT " = "
808 CALCULATED_NUMBER_FORMAT
813 , rd->calculated_value
814 , (next_store_ut - last_stored_ut)
815 , (now_collect_ut - last_stored_ut)
818 rd->calculated_value -= new_value;
819 new_value += rd->last_calculated_value;
820 rd->last_calculated_value = 0;
821 new_value /= (calculated_number)st->update_every;
823 if(unlikely(next_store_ut - last_stored_ut < update_every_ut)) {
824 if(unlikely(st->debug))
825 debug(D_RRD_STATS, "%s/%s: COLLECTION POINT IS SHORT " CALCULATED_NUMBER_FORMAT " - EXTRAPOLATING",
827 , (calculated_number)(next_store_ut - last_stored_ut)
829 new_value = new_value * (calculated_number)(st->update_every * 1000000) / (calculated_number)(next_store_ut - last_stored_ut);
833 case RRD_ALGORITHM_ABSOLUTE:
834 case RRD_ALGORITHM_PCENT_OVER_ROW_TOTAL:
835 case RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL:
837 if(iterations == 1) {
838 // this is the last iteration
839 // do not interpolate
840 // just show the calculated value
842 new_value = rd->calculated_value;
845 // we have missed an update
846 // interpolate in the middle values
848 new_value = (calculated_number)
849 ( ( (rd->calculated_value - rd->last_calculated_value)
850 * (calculated_number)(next_store_ut - last_collect_ut)
851 / (calculated_number)(now_collect_ut - last_collect_ut)
853 + rd->last_calculated_value
856 if(unlikely(st->debug))
857 debug(D_RRD_STATS, "%s/%s: CALC2 DEF "
858 CALCULATED_NUMBER_FORMAT " = ((("
859 "(" CALCULATED_NUMBER_FORMAT " - " CALCULATED_NUMBER_FORMAT ")"
861 " / %llu) + " CALCULATED_NUMBER_FORMAT
864 , rd->calculated_value, rd->last_calculated_value
865 , (next_store_ut - first_ut)
866 , (now_collect_ut - first_ut), rd->last_calculated_value
872 if(unlikely(!store_this_entry)) {
873 rd->values[st->current_entry] = pack_storage_number(0, SN_NOT_EXISTS);
877 if(likely(rrddim_flag_check(rd, RRDDIM_FLAG_UPDATED) && rd->counter > 1 && iterations < st->gap_when_lost_iterations_above)) {
878 rd->values[st->current_entry] = pack_storage_number(new_value, storage_flags );
879 rd->last_stored_value = new_value;
881 if(unlikely(st->debug))
882 debug(D_RRD_STATS, "%s/%s: STORE[%ld] "
883 CALCULATED_NUMBER_FORMAT " = " CALCULATED_NUMBER_FORMAT
886 , unpack_storage_number(rd->values[st->current_entry]), new_value
890 if(unlikely(st->debug)) debug(D_RRD_STATS, "%s/%s: STORE[%ld] = NON EXISTING "
894 rd->values[st->current_entry] = pack_storage_number(0, SN_NOT_EXISTS);
895 rd->last_stored_value = NAN;
900 if(unlikely(st->debug)) {
901 calculated_number t1 = new_value * (calculated_number)rd->multiplier / (calculated_number)rd->divisor;
902 calculated_number t2 = unpack_storage_number(rd->values[st->current_entry]);
903 calculated_number accuracy = accuracy_loss(t1, t2);
904 debug(D_RRD_STATS, "%s/%s: UNPACK[%ld] = " CALCULATED_NUMBER_FORMAT " FLAGS=0x%08x (original = " CALCULATED_NUMBER_FORMAT ", accuracy loss = " CALCULATED_NUMBER_FORMAT "%%%s)"
908 , get_storage_number_flags(rd->values[st->current_entry])
911 , (accuracy > ACCURACY_LOSS) ? " **TOO BIG** " : ""
914 rd->collected_volume += t1;
915 rd->stored_volume += t2;
916 accuracy = accuracy_loss(rd->collected_volume, rd->stored_volume);
917 debug(D_RRD_STATS, "%s/%s: VOLUME[%ld] = " CALCULATED_NUMBER_FORMAT ", calculated = " CALCULATED_NUMBER_FORMAT ", accuracy loss = " CALCULATED_NUMBER_FORMAT "%%%s"
921 , rd->collected_volume
923 , (accuracy > ACCURACY_LOSS) ? " **TOO BIG** " : ""
928 // reset the storage flags for the next point, if any;
929 storage_flags = SN_EXISTS;
932 st->current_entry = ((st->current_entry + 1) >= st->entries) ? 0 : st->current_entry + 1;
933 last_stored_ut = next_store_ut;
936 st->last_collected_total = st->collected_total;
938 for( rd = st->dimensions; rd ; rd = rd->next ) {
939 if(unlikely(!rrddim_flag_check(rd, RRDDIM_FLAG_UPDATED)))
942 if(unlikely(st->debug)) debug(D_RRD_STATS, "%s/%s: setting last_collected_value (old: " COLLECTED_NUMBER_FORMAT ") to last_collected_value (new: " COLLECTED_NUMBER_FORMAT ")", st->id, rd->name, rd->last_collected_value, rd->collected_value);
943 rd->last_collected_value = rd->collected_value;
945 switch(rd->algorithm) {
946 case RRD_ALGORITHM_INCREMENTAL:
947 if(unlikely(!first_entry)) {
948 if(unlikely(st->debug)) debug(D_RRD_STATS, "%s/%s: setting last_calculated_value (old: " CALCULATED_NUMBER_FORMAT ") to last_calculated_value (new: " CALCULATED_NUMBER_FORMAT ")", st->id, rd->name, rd->last_calculated_value + rd->calculated_value, rd->calculated_value);
949 rd->last_calculated_value += rd->calculated_value;
952 if(unlikely(st->debug)) debug(D_RRD_STATS, "%s: THIS IS THE FIRST POINT", st->name);
956 case RRD_ALGORITHM_ABSOLUTE:
957 case RRD_ALGORITHM_PCENT_OVER_ROW_TOTAL:
958 case RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL:
959 if(unlikely(st->debug)) debug(D_RRD_STATS, "%s/%s: setting last_calculated_value (old: " CALCULATED_NUMBER_FORMAT ") to last_calculated_value (new: " CALCULATED_NUMBER_FORMAT ")", st->id, rd->name, rd->last_calculated_value, rd->calculated_value);
960 rd->last_calculated_value = rd->calculated_value;
964 rd->calculated_value = 0;
965 rd->collected_value = 0;
966 rrddim_flag_clear(rd, RRDDIM_FLAG_UPDATED);
968 if(unlikely(st->debug)) debug(D_RRD_STATS, "%s/%s: END "
969 " last_collected_value = " COLLECTED_NUMBER_FORMAT
970 " collected_value = " COLLECTED_NUMBER_FORMAT
971 " last_calculated_value = " CALCULATED_NUMBER_FORMAT
972 " calculated_value = " CALCULATED_NUMBER_FORMAT
974 , rd->last_collected_value
975 , rd->collected_value
976 , rd->last_calculated_value
977 , rd->calculated_value
981 // ALL DONE ABOUT THE DATA UPDATE
982 // --------------------------------------------------------------------
985 // find if there are any obsolete dimensions (not updated recently)
986 if(unlikely(rrd_delete_unupdated_dimensions)) {
988 for( rd = st->dimensions; likely(rd) ; rd = rd->next )
989 if((rd->last_collected_time.tv_sec + (rrd_delete_unupdated_dimensions * st->update_every)) < st->last_collected_time.tv_sec)
994 // there is dimension to free
995 // upgrade our read lock to a write lock
996 pthread_rwlock_unlock(&st->rwlock);
997 pthread_rwlock_wrlock(&st->rwlock);
999 for( rd = st->dimensions, last = NULL ; likely(rd) ; ) {
1000 // remove it only it is not updated in rrd_delete_unupdated_dimensions seconds
1002 if(unlikely((rd->last_collected_time.tv_sec + (rrd_delete_unupdated_dimensions * st->update_every)) < st->last_collected_time.tv_sec)) {
1003 info("Removing obsolete dimension '%s' (%s) of '%s' (%s).", rd->name, rd->id, st->name, st->id);
1005 if(unlikely(!last)) {
1006 st->dimensions = rd->next;
1008 rrddim_free(st, rd);
1009 rd = st->dimensions;
1013 last->next = rd->next;
1015 rrddim_free(st, rd);
1025 if(unlikely(!st->dimensions)) {
1026 info("Disabling chart %s (%s) since it does not have any dimensions", st->name, st->id);
1033 pthread_rwlock_unlock(&st->rwlock);
1035 if(unlikely(pthread_setcancelstate(pthreadoldcancelstate, NULL) != 0))
1036 error("Cannot set pthread cancel state to RESTORE (%d).", pthreadoldcancelstate);
1038 return(st->usec_since_last_update);