1 #define NETDATA_RRD_INTERNALS 1
4 #define RRD_DEFAULT_GAP_INTERPOLATIONS 1
6 void rrdset_check_rdlock_int(RRDSET *st, const char *file, const char *function, const unsigned long line) {
7 debug(D_RRD_CALLS, "Checking read lock on chart '%s'", st->id);
9 int ret = pthread_rwlock_trywrlock(&st->rrdset_rwlock);
11 fatal("RRDSET '%s' should be read-locked, but it is not, at function %s() at line %lu of file '%s'", st->id, function, line, file);
14 void rrdset_check_wrlock_int(RRDSET *st, const char *file, const char *function, const unsigned long line) {
15 debug(D_RRD_CALLS, "Checking write lock on chart '%s'", st->id);
17 int ret = pthread_rwlock_tryrdlock(&st->rrdset_rwlock);
19 fatal("RRDSET '%s' should be write-locked, but it is not, at function %s() at line %lu of file '%s'", st->id, function, line, file);
23 // ----------------------------------------------------------------------------
26 int rrdset_compare(void* a, void* b) {
27 if(((RRDSET *)a)->hash < ((RRDSET *)b)->hash) return -1;
28 else if(((RRDSET *)a)->hash > ((RRDSET *)b)->hash) return 1;
29 else return strcmp(((RRDSET *)a)->id, ((RRDSET *)b)->id);
32 static RRDSET *rrdset_index_find(RRDHOST *host, const char *id, uint32_t hash) {
34 strncpyz(tmp.id, id, RRD_ID_LENGTH_MAX);
35 tmp.hash = (hash)?hash:simple_hash(tmp.id);
37 return (RRDSET *)avl_search_lock(&(host->rrdset_root_index), (avl *) &tmp);
40 // ----------------------------------------------------------------------------
43 #define rrdset_from_avlname(avlname_ptr) ((RRDSET *)((avlname_ptr) - offsetof(RRDSET, avlname)))
45 int rrdset_compare_name(void* a, void* b) {
46 RRDSET *A = rrdset_from_avlname(a);
47 RRDSET *B = rrdset_from_avlname(b);
49 // fprintf(stderr, "COMPARING: %s with %s\n", A->name, B->name);
51 if(A->hash_name < B->hash_name) return -1;
52 else if(A->hash_name > B->hash_name) return 1;
53 else return strcmp(A->name, B->name);
56 RRDSET *rrdset_index_add_name(RRDHOST *host, RRDSET *st) {
58 // fprintf(stderr, "ADDING: %s (name: %s)\n", st->id, st->name);
59 result = avl_insert_lock(&host->rrdset_root_index_name, (avl *) (&st->avlname));
60 if(result) return rrdset_from_avlname(result);
64 RRDSET *rrdset_index_del_name(RRDHOST *host, RRDSET *st) {
66 // fprintf(stderr, "DELETING: %s (name: %s)\n", st->id, st->name);
67 result = (RRDSET *)avl_remove_lock(&((host)->rrdset_root_index_name), (avl *)(&st->avlname));
68 if(result) return rrdset_from_avlname(result);
73 // ----------------------------------------------------------------------------
74 // RRDSET - find charts
76 static inline RRDSET *rrdset_index_find_name(RRDHOST *host, const char *name, uint32_t hash) {
80 tmp.hash_name = (hash)?hash:simple_hash(tmp.name);
82 // fprintf(stderr, "SEARCHING: %s\n", name);
83 result = avl_search_lock(&host->rrdset_root_index_name, (avl *) (&(tmp.avlname)));
85 RRDSET *st = rrdset_from_avlname(result);
86 if(strcmp(st->magic, RRDSET_MAGIC))
87 error("Search for RRDSET %s returned an invalid RRDSET %s (name %s)", name, st->id, st->name);
89 // fprintf(stderr, "FOUND: %s\n", name);
90 return rrdset_from_avlname(result);
92 // fprintf(stderr, "NOT FOUND: %s\n", name);
96 inline RRDSET *rrdset_find(RRDHOST *host, const char *id) {
97 debug(D_RRD_CALLS, "rrdset_find() for chart '%s' in host '%s'", id, host->hostname);
98 RRDSET *st = rrdset_index_find(host, id, 0);
102 inline RRDSET *rrdset_find_bytype(RRDHOST *host, const char *type, const char *id) {
103 debug(D_RRD_CALLS, "rrdset_find_bytype() for chart '%s.%s' in host '%s'", type, id, host->hostname);
105 char buf[RRD_ID_LENGTH_MAX + 1];
106 strncpyz(buf, type, RRD_ID_LENGTH_MAX - 1);
108 int len = (int) strlen(buf);
109 strncpyz(&buf[len], id, (size_t) (RRD_ID_LENGTH_MAX - len));
111 return(rrdset_find(host, buf));
114 inline RRDSET *rrdset_find_byname(RRDHOST *host, const char *name) {
115 debug(D_RRD_CALLS, "rrdset_find_byname() for chart '%s' in host '%s'", name, host->hostname);
116 RRDSET *st = rrdset_index_find_name(host, name, 0);
120 // ----------------------------------------------------------------------------
121 // RRDSET - rename charts
123 char *rrdset_strncpyz_name(char *to, const char *from, size_t length) {
126 while (length-- && (c = *from++)) {
127 if(c != '.' && !isalnum(c))
138 void rrdset_set_name(RRDSET *st, const char *name) {
139 if(unlikely(st->name && !strcmp(st->name, name)))
142 debug(D_RRD_CALLS, "rrdset_set_name() old: %s, new: %s", st->name, name);
144 char b[CONFIG_MAX_VALUE + 1];
145 char n[RRD_ID_LENGTH_MAX + 1];
147 snprintfz(n, RRD_ID_LENGTH_MAX, "%s.%s", st->type, name);
148 rrdset_strncpyz_name(b, n, CONFIG_MAX_VALUE);
151 rrdset_index_del_name(st->rrdhost, st);
152 st->name = config_set_default(st->config_section, "name", b);
153 st->hash_name = simple_hash(st->name);
154 rrdsetvar_rename_all(st);
157 st->name = config_get(st->config_section, "name", b);
158 st->hash_name = simple_hash(st->name);
163 rrddim_foreach_write(rd, st)
164 rrddimvar_rename_all(rd);
167 if(unlikely(rrdset_index_add_name(st->rrdhost, st) != st))
168 error("RRDSET: INTERNAL ERROR: attempted to index duplicate chart name '%s'", st->name);
172 // ----------------------------------------------------------------------------
173 // RRDSET - reset a chart
175 void rrdset_reset(RRDSET *st) {
176 debug(D_RRD_CALLS, "rrdset_reset() %s", st->name);
178 st->last_collected_time.tv_sec = 0;
179 st->last_collected_time.tv_usec = 0;
180 st->last_updated.tv_sec = 0;
181 st->last_updated.tv_usec = 0;
182 st->current_entry = 0;
184 st->counter_done = 0;
187 rrddim_foreach_read(rd, st) {
188 rd->last_collected_time.tv_sec = 0;
189 rd->last_collected_time.tv_usec = 0;
191 memset(rd->values, 0, rd->entries * sizeof(storage_number));
195 // ----------------------------------------------------------------------------
196 // RRDSET - helpers for rrdset_create()
198 inline long align_entries_to_pagesize(RRD_MEMORY_MODE mode, long entries) {
199 if(unlikely(entries < 5)) entries = 5;
200 if(unlikely(entries > RRD_HISTORY_ENTRIES_MAX)) entries = RRD_HISTORY_ENTRIES_MAX;
202 if(unlikely(mode == RRD_MEMORY_MODE_NONE || mode == RRD_MEMORY_MODE_RAM))
205 long page = (size_t)sysconf(_SC_PAGESIZE);
206 long size = sizeof(RRDDIM) + entries * sizeof(storage_number);
207 if(unlikely(size % page)) {
208 size -= (size % page);
211 long n = (size - sizeof(RRDDIM)) / sizeof(storage_number);
218 static inline void timeval_align(struct timeval *tv, int update_every) {
219 tv->tv_sec -= tv->tv_sec % update_every;
220 tv->tv_usec = 500000;
223 // ----------------------------------------------------------------------------
224 // RRDSET - free a chart
226 void rrdset_free(RRDSET *st) {
227 if(unlikely(!st)) return;
229 rrdhost_check_wrlock(st->rrdhost); // make sure we have a write lock on the host
230 rrdset_wrlock(st); // lock this RRDSET
232 // ------------------------------------------------------------------------
233 // free its children structures
235 while(st->variables) rrdsetvar_free(st->variables);
236 while(st->alarms) rrdsetcalc_unlink(st->alarms);
237 while(st->dimensions) rrddim_free(st, st->dimensions);
239 rrdfamily_free(st->rrdhost, st->rrdfamily);
241 // ------------------------------------------------------------------------
242 // remove it from the indexes
244 if(unlikely(rrdset_index_del(st->rrdhost, st) != st))
245 error("RRDSET: INTERNAL ERROR: attempt to remove from index chart '%s', removed a different chart.", st->id);
247 rrdset_index_del_name(st->rrdhost, st);
249 // ------------------------------------------------------------------------
250 // unlink it from the host
252 if(st == st->rrdhost->rrdset_root) {
253 st->rrdhost->rrdset_root = st->next;
256 // find the previous one
258 for(s = st->rrdhost->rrdset_root; s && s->next != st ; s = s->next) ;
261 if(s) s->next = st->next;
262 else error("Request to free RRDSET '%s': cannot find it under host '%s'", st->id, st->rrdhost->hostname);
267 // ------------------------------------------------------------------------
270 // free directly allocated members
271 freez(st->config_section);
273 if(st->rrd_memory_mode == RRD_MEMORY_MODE_SAVE || st->rrd_memory_mode == RRD_MEMORY_MODE_MAP) {
274 debug(D_RRD_CALLS, "Unmapping stats '%s'.", st->name);
275 munmap(st, st->memsize);
281 // ----------------------------------------------------------------------------
282 // RRDSET - create a chart
284 RRDSET *rrdset_create(RRDHOST *host, const char *type, const char *id, const char *name, const char *family
285 , const char *context, const char *title, const char *units, long priority
286 , int update_every, RRDSET_TYPE chart_type) {
288 if(!type || !type[0]) {
289 fatal("Cannot create rrd stats without a type.");
294 fatal("Cannot create rrd stats without an id.");
298 // ------------------------------------------------------------------------
299 // check if it already exists
301 char fullid[RRD_ID_LENGTH_MAX + 1];
302 snprintfz(fullid, RRD_ID_LENGTH_MAX, "%s.%s", type, id);
304 RRDSET *st = rrdset_find(host, fullid);
306 debug(D_RRD_CALLS, "RRDSET '%s', already exists.", fullid);
310 char fullfilename[FILENAME_MAX + 1];
312 // ------------------------------------------------------------------------
313 // compose the config_section for this chart
315 char config_section[RRD_ID_LENGTH_MAX + 1];
316 if(host == localhost)
317 strcpy(config_section, fullid);
319 snprintfz(config_section, RRD_ID_LENGTH_MAX, "%s/%s", host->machine_guid, fullid);
321 // ------------------------------------------------------------------------
322 // get the options from the config, we need to create it
324 long rentries = config_get_number(config_section, "history", host->rrd_history_entries);
325 long entries = align_entries_to_pagesize(host->rrd_memory_mode, rentries);
326 if(entries != rentries) entries = config_set_number(config_section, "history", entries);
328 if(host->rrd_memory_mode == RRD_MEMORY_MODE_NONE && entries != rentries)
329 entries = config_set_number(config_section, "history", 10);
331 int enabled = config_get_boolean(config_section, "enabled", 1);
332 if(!enabled) entries = 5;
334 unsigned long size = sizeof(RRDSET);
335 char *cache_dir = rrdset_cache_dir(host, fullid, config_section);
337 time_t now = now_realtime_sec();
339 // ------------------------------------------------------------------------
340 // load it or allocate it
342 debug(D_RRD_CALLS, "Creating RRD_STATS for '%s.%s'.", type, id);
344 snprintfz(fullfilename, FILENAME_MAX, "%s/main.db", cache_dir);
345 if(host->rrd_memory_mode == RRD_MEMORY_MODE_SAVE || host->rrd_memory_mode == RRD_MEMORY_MODE_MAP) {
346 st = (RRDSET *) mymmap(fullfilename, size, ((host->rrd_memory_mode == RRD_MEMORY_MODE_MAP) ? MAP_SHARED : MAP_PRIVATE), 0);
348 memset(&st->avl, 0, sizeof(avl));
349 memset(&st->avlname, 0, sizeof(avl));
350 memset(&st->variables_root_index, 0, sizeof(avl_tree_lock));
351 memset(&st->dimensions_index, 0, sizeof(avl_tree_lock));
352 memset(&st->rrdset_rwlock, 0, sizeof(pthread_rwlock_t));
360 st->dimensions = NULL;
362 st->variables = NULL;
364 st->flags = 0x00000000;
366 if(strcmp(st->magic, RRDSET_MAGIC) != 0) {
368 info("Initializing file %s.", fullfilename);
371 else if(strcmp(st->id, fullid) != 0) {
373 error("File %s contents are not for chart %s. Clearing it.", fullfilename, fullid);
378 else if(st->memsize != size || st->entries != entries) {
380 error("File %s does not have the desired size. Clearing it.", fullfilename);
383 else if(st->update_every != update_every) {
385 error("File %s does not have the desired update frequency. Clearing it.", fullfilename);
388 else if((now - st->last_updated.tv_sec) > update_every * entries) {
390 error("File %s is too old. Clearing it.", fullfilename);
393 else if(st->last_updated.tv_sec > now + update_every) {
395 error("File %s refers to the future. Clearing it.", fullfilename);
399 // make sure the database is aligned
400 if(st->last_updated.tv_sec)
401 timeval_align(&st->last_updated, update_every);
403 // make sure we have the right memory mode
404 // even if we cleared the memory
405 st->rrd_memory_mode = host->rrd_memory_mode;
410 st = callocz(1, size);
411 st->rrd_memory_mode = (host->rrd_memory_mode == RRD_MEMORY_MODE_NONE) ? RRD_MEMORY_MODE_NONE : RRD_MEMORY_MODE_RAM;
414 st->config_section = strdup(config_section);
417 st->entries = entries;
418 st->update_every = update_every;
420 if(st->current_entry >= st->entries) st->current_entry = 0;
422 strcpy(st->cache_filename, fullfilename);
423 strcpy(st->magic, RRDSET_MAGIC);
425 strcpy(st->id, fullid);
426 st->hash = simple_hash(st->id);
428 st->cache_dir = cache_dir;
430 st->chart_type = rrdset_type_id(config_get(st->config_section, "chart type", rrdset_type_name(chart_type)));
431 st->type = config_get(st->config_section, "type", type);
432 st->family = config_get(st->config_section, "family", family?family:st->type);
433 st->units = config_get(st->config_section, "units", units?units:"");
435 st->context = config_get(st->config_section, "context", context?context:st->id);
436 st->hash_context = simple_hash(st->context);
438 st->priority = config_get_number(st->config_section, "priority", priority);
440 rrdset_flag_set(st, RRDSET_FLAG_ENABLED);
442 rrdset_flag_clear(st, RRDSET_FLAG_ENABLED);
444 rrdset_flag_clear(st, RRDSET_FLAG_DETAIL);
445 rrdset_flag_clear(st, RRDSET_FLAG_DEBUG);
447 // if(!strcmp(st->id, "disk_util.dm-0")) {
449 // error("enabled debugging for '%s'", st->id);
451 // else error("not enabled debugging for '%s'", st->id);
456 st->last_collected_time.tv_sec = 0;
457 st->last_collected_time.tv_usec = 0;
458 st->counter_done = 0;
460 st->gap_when_lost_iterations_above = (int) (
461 config_get_number(st->config_section, "gap when lost iterations above", RRD_DEFAULT_GAP_INTERPOLATIONS) + 2);
463 avl_init_lock(&st->dimensions_index, rrddim_compare);
464 avl_init_lock(&st->variables_root_index, rrdvar_compare);
466 pthread_rwlock_init(&st->rrdset_rwlock, NULL);
467 rrdhost_wrlock(host);
469 if(name && *name) rrdset_set_name(st, name);
470 else rrdset_set_name(st, id);
473 char varvalue[CONFIG_MAX_VALUE + 1];
474 char varvalue2[CONFIG_MAX_VALUE + 1];
475 snprintfz(varvalue, CONFIG_MAX_VALUE, "%s (%s)", title?title:"", st->name);
476 json_escape_string(varvalue2, varvalue, sizeof(varvalue2));
477 st->title = config_get(st->config_section, "title", varvalue2);
480 st->rrdfamily = rrdfamily_create(host, st->family);
482 st->next = host->rrdset_root;
483 host->rrdset_root = st;
485 if(host->health_enabled) {
486 rrdsetvar_create(st, "last_collected_t", RRDVAR_TYPE_TIME_T, &st->last_collected_time.tv_sec, 0);
487 rrdsetvar_create(st, "collected_total_raw", RRDVAR_TYPE_TOTAL, &st->last_collected_total, 0);
488 rrdsetvar_create(st, "green", RRDVAR_TYPE_CALCULATED, &st->green, 0);
489 rrdsetvar_create(st, "red", RRDVAR_TYPE_CALCULATED, &st->red, 0);
490 rrdsetvar_create(st, "update_every", RRDVAR_TYPE_INT, &st->update_every, 0);
493 if(unlikely(rrdset_index_add(host, st) != st))
494 error("RRDSET: INTERNAL ERROR: attempt to index duplicate chart '%s'", st->id);
496 rrdsetcalc_link_matching(st);
497 rrdcalctemplate_link_matching(st);
499 rrdhost_unlock(host);
505 // ----------------------------------------------------------------------------
506 // RRDSET - data collection iteration control
508 inline void rrdset_next_usec_unfiltered(RRDSET *st, usec_t microseconds) {
510 if(unlikely(!st->last_collected_time.tv_sec)) {
512 microseconds = st->update_every * USEC_PER_SEC;
514 else if(unlikely(!microseconds)) {
515 // no dt given by the plugin
517 now_realtime_timeval(&now);
518 microseconds = dt_usec(&now, &st->last_collected_time);
521 st->usec_since_last_update = microseconds;
524 inline void rrdset_next_usec(RRDSET *st, usec_t microseconds) {
526 now_realtime_timeval(&now);
528 if(unlikely(!st->last_collected_time.tv_sec)) {
530 microseconds = st->update_every * USEC_PER_SEC;
532 else if(unlikely(!microseconds)) {
533 // no dt given by the plugin
534 microseconds = dt_usec(&now, &st->last_collected_time);
537 // microseconds has the time since the last collection
538 //#ifdef NETDATA_INTERNAL_CHECKS
539 // usec_t now_usec = timeval_usec(&now);
540 // usec_t last_usec = timeval_usec(&st->last_collected_time);
542 susec_t since_last_usec = dt_usec_signed(&now, &st->last_collected_time);
544 if(unlikely(since_last_usec < 0)) {
545 // oops! the database is in the future
546 error("Database for chart '%s' on host '%s' is %lld microseconds in the future.", st->id, st->rrdhost->hostname, -since_last_usec);
547 memcpy(&st->last_collected_time, &now, sizeof(struct timeval));
548 st->last_collected_time.tv_sec -= st->update_every;
550 memcpy(&st->last_updated, &now, sizeof(struct timeval));
551 timeval_align(&st->last_updated, st->update_every);
552 st->last_updated.tv_sec -= st->update_every;
554 microseconds = st->update_every * USEC_PER_SEC;
555 since_last_usec = st->update_every * USEC_PER_SEC;
558 // verify the microseconds given is good
559 if(unlikely(microseconds > (usec_t)since_last_usec)) {
560 debug(D_RRD_CALLS, "dt %llu usec given is too big - it leads %llu usec to the future, for chart '%s' (%s).", microseconds, microseconds - (usec_t)since_last_usec, st->name, st->id);
562 //#ifdef NETDATA_INTERNAL_CHECKS
563 // if(unlikely(last_usec + microseconds > now_usec + 1000))
564 // error("dt %llu usec given is too big - it leads %llu usec to the future, for chart '%s' (%s).", microseconds, microseconds - (usec_t)since_last_usec, st->name, st->id);
567 microseconds = (usec_t)since_last_usec;
569 else if(unlikely(microseconds < (usec_t)since_last_usec * 0.8)) {
570 debug(D_RRD_CALLS, "dt %llu usec given is too small - expected %llu usec up to -20%%, for chart '%s' (%s).", microseconds, (usec_t)since_last_usec, st->name, st->id);
572 //#ifdef NETDATA_INTERNAL_CHECKS
573 // error("dt %llu usec given is too small - expected %llu usec up to -20%%, for chart '%s' (%s).", microseconds, (usec_t)since_last_usec, st->name, st->id);
575 microseconds = (usec_t)since_last_usec;
578 debug(D_RRD_CALLS, "rrdset_next_usec() for chart %s with microseconds %llu", st->name, microseconds);
580 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
581 debug(D_RRD_STATS, "%s: NEXT: %llu microseconds", st->name, microseconds);
583 st->usec_since_last_update = microseconds;
587 // ----------------------------------------------------------------------------
588 // RRDSET - process the collected values for all dimensions of a chart
590 static inline void rrdset_init_last_collected_time(RRDSET *st) {
591 now_realtime_timeval(&st->last_collected_time);
592 timeval_align(&st->last_collected_time, st->update_every);
595 static inline usec_t rrdset_update_last_collected_time(RRDSET *st) {
596 usec_t last_collect_ut = st->last_collected_time.tv_sec * USEC_PER_SEC + st->last_collected_time.tv_usec;
597 usec_t ut = last_collect_ut + st->usec_since_last_update;
598 st->last_collected_time.tv_sec = (time_t) (ut / USEC_PER_SEC);
599 st->last_collected_time.tv_usec = (suseconds_t) (ut % USEC_PER_SEC);
600 return last_collect_ut;
603 static inline void rrdset_init_last_updated_time(RRDSET *st) {
604 // copy the last collected time to last updated time
605 memcpy(&st->last_updated, &st->last_collected_time, sizeof(struct timeval));
606 timeval_align(&st->last_updated, st->update_every);
607 st->last_updated.tv_usec = 0;
610 static inline void rrdset_done_push_int(RRDSET *st) {
611 if(unlikely(!st->last_collected_time.tv_sec)) {
612 // it is the first entry
613 // set the last_collected_time to now
614 rrdset_init_last_collected_time(st);
617 // it is not the first entry
618 // calculate the proper last_collected_time, using usec_since_last_update
619 rrdset_update_last_collected_time(st);
625 rrdset_done_push(st);
628 void rrdset_done(RRDSET *st) {
629 if(unlikely(netdata_exit)) return;
631 if(unlikely(st->rrdhost->rrdpush_exclusive)) {
632 rrdset_done_push_int(st);
636 debug(D_RRD_CALLS, "rrdset_done() for chart %s", st->name);
641 pthreadoldcancelstate; // store the old cancelable pthread state, to restore it at the end
644 store_this_entry = 1, // boolean: 1 = store this entry, 0 = don't store this entry
645 first_entry = 0; // boolean: 1 = this is the first entry seen for this chart, 0 = all other entries
648 stored_entries = 0; // the number of entries we have stored in the db, during this call to rrdset_done()
651 last_collect_ut, // the timestamp in microseconds, of the last collected value
652 now_collect_ut, // the timestamp in microseconds, of this collected value (this is NOW)
653 last_stored_ut, // the timestamp in microseconds, of the last stored entry in the db
654 next_store_ut, // the timestamp in microseconds, of the next entry to store in the db
655 update_every_ut = st->update_every * USEC_PER_SEC; // st->update_every in microseconds
657 if(unlikely(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &pthreadoldcancelstate) != 0))
658 error("Cannot set pthread cancel state to DISABLE.");
660 // a read lock is OK here
664 // enable the chart, if it was disabled
665 if(unlikely(rrd_delete_unupdated_dimensions) && !st->enabled)
669 // check if the chart has a long time to be updated
670 if(unlikely(st->usec_since_last_update > st->entries * update_every_ut)) {
671 info("%s: took too long to be updated (%0.3Lf secs). Resetting it.", st->name, (long double)(st->usec_since_last_update / 1000000.0));
673 st->usec_since_last_update = update_every_ut;
677 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
678 debug(D_RRD_STATS, "%s: microseconds since last update: %llu", st->name, st->usec_since_last_update);
680 // set last_collected_time
681 if(unlikely(!st->last_collected_time.tv_sec)) {
682 // it is the first entry
683 // set the last_collected_time to now
684 rrdset_init_last_collected_time(st);
686 last_collect_ut = st->last_collected_time.tv_sec * USEC_PER_SEC + st->last_collected_time.tv_usec - update_every_ut;
688 // the first entry should not be stored
689 store_this_entry = 0;
692 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
693 debug(D_RRD_STATS, "%s: has not set last_collected_time. Setting it now. Will not store the next entry.", st->name);
696 // it is not the first entry
697 // calculate the proper last_collected_time, using usec_since_last_update
698 last_collect_ut = rrdset_update_last_collected_time(st);
701 // if this set has not been updated in the past
702 // we fake the last_update time to be = now - usec_since_last_update
703 if(unlikely(!st->last_updated.tv_sec)) {
704 // it has never been updated before
705 // set a fake last_updated, in the past using usec_since_last_update
706 rrdset_init_last_updated_time(st);
708 // the first entry should not be stored
709 store_this_entry = 0;
712 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
713 debug(D_RRD_STATS, "%s: initializing last_updated to last_collected_time - %llu microseconds. Will not store the next entry.", st->name, st->usec_since_last_update);
716 // check if we will re-write the entire data set
717 if(unlikely(dt_usec(&st->last_collected_time, &st->last_updated) > st->entries * update_every_ut)) {
718 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);
720 rrdset_init_last_updated_time(st);
722 st->usec_since_last_update = update_every_ut;
724 // the first entry should not be stored
725 store_this_entry = 0;
729 // these are the 3 variables that will help us in interpolation
730 // last_stored_ut = the last time we added a value to the storage
731 // now_collect_ut = the time the current value has been collected
732 // next_store_ut = the time of the next interpolation point
733 last_stored_ut = st->last_updated.tv_sec * USEC_PER_SEC + st->last_updated.tv_usec;
734 now_collect_ut = st->last_collected_time.tv_sec * USEC_PER_SEC + st->last_collected_time.tv_usec;
735 next_store_ut = (st->last_updated.tv_sec + st->update_every) * USEC_PER_SEC;
737 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG))) {
738 debug(D_RRD_STATS, "%s: last_collect_ut = %0.3Lf (last collection time)", st->name, (long double)last_collect_ut/1000000.0);
739 debug(D_RRD_STATS, "%s: now_collect_ut = %0.3Lf (current collection time)", st->name, (long double)now_collect_ut/1000000.0);
740 debug(D_RRD_STATS, "%s: last_stored_ut = %0.3Lf (last updated time)", st->name, (long double)last_stored_ut/1000000.0);
741 debug(D_RRD_STATS, "%s: next_store_ut = %0.3Lf (next interpolation point)", st->name, (long double)next_store_ut/1000000.0);
744 if(unlikely(!st->counter_done)) {
745 store_this_entry = 0;
746 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
747 debug(D_RRD_STATS, "%s: Will not store the next entry.", st->name);
751 // calculate totals and count the dimensions
753 st->collected_total = 0;
754 rrddim_foreach_read(rd, st) {
756 if(likely(rrddim_flag_check(rd, RRDDIM_FLAG_UPDATED)))
757 st->collected_total += rd->collected_value;
760 uint32_t storage_flags = SN_EXISTS;
762 // process all dimensions to calculate their values
763 // based on the collected figures only
764 // at this stage we do not interpolate anything
765 rrddim_foreach_read(rd, st) {
767 if(unlikely(!rrddim_flag_check(rd, RRDDIM_FLAG_UPDATED))) {
768 rd->calculated_value = 0;
772 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
773 debug(D_RRD_STATS, "%s/%s: START "
774 " last_collected_value = " COLLECTED_NUMBER_FORMAT
775 " collected_value = " COLLECTED_NUMBER_FORMAT
776 " last_calculated_value = " CALCULATED_NUMBER_FORMAT
777 " calculated_value = " CALCULATED_NUMBER_FORMAT
779 , rd->last_collected_value
780 , rd->collected_value
781 , rd->last_calculated_value
782 , rd->calculated_value
785 switch(rd->algorithm) {
786 case RRD_ALGORITHM_ABSOLUTE:
787 rd->calculated_value = (calculated_number)rd->collected_value
788 * (calculated_number)rd->multiplier
789 / (calculated_number)rd->divisor;
791 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
792 debug(D_RRD_STATS, "%s/%s: CALC ABS/ABS-NO-IN "
793 CALCULATED_NUMBER_FORMAT " = "
794 COLLECTED_NUMBER_FORMAT
795 " * " CALCULATED_NUMBER_FORMAT
796 " / " CALCULATED_NUMBER_FORMAT
798 , rd->calculated_value
799 , rd->collected_value
800 , (calculated_number)rd->multiplier
801 , (calculated_number)rd->divisor
805 case RRD_ALGORITHM_PCENT_OVER_ROW_TOTAL:
806 if(unlikely(!st->collected_total))
807 rd->calculated_value = 0;
809 // the percentage of the current value
810 // over the total of all dimensions
811 rd->calculated_value =
812 (calculated_number)100
813 * (calculated_number)rd->collected_value
814 / (calculated_number)st->collected_total;
816 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
817 debug(D_RRD_STATS, "%s/%s: CALC PCENT-ROW "
818 CALCULATED_NUMBER_FORMAT " = 100"
819 " * " COLLECTED_NUMBER_FORMAT
820 " / " COLLECTED_NUMBER_FORMAT
822 , rd->calculated_value
823 , rd->collected_value
824 , st->collected_total
828 case RRD_ALGORITHM_INCREMENTAL:
829 if(unlikely(rd->counter <= 1)) {
830 rd->calculated_value = 0;
834 // if the new is smaller than the old (an overflow, or reset), set the old equal to the new
835 // to reset the calculation (it will give zero as the calculation for this second)
836 if(unlikely(rd->last_collected_value > rd->collected_value)) {
837 debug(D_RRD_STATS, "%s.%s: RESET or OVERFLOW. Last collected value = " COLLECTED_NUMBER_FORMAT ", current = " COLLECTED_NUMBER_FORMAT
839 , rd->last_collected_value
840 , rd->collected_value);
842 if(!(rrddim_flag_check(rd, RRDDIM_FLAG_DONT_DETECT_RESETS_OR_OVERFLOWS)))
843 storage_flags = SN_EXISTS_RESET;
845 rd->last_collected_value = rd->collected_value;
848 rd->calculated_value +=
849 (calculated_number)(rd->collected_value - rd->last_collected_value)
850 * (calculated_number)rd->multiplier
851 / (calculated_number)rd->divisor;
853 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
854 debug(D_RRD_STATS, "%s/%s: CALC INC PRE "
855 CALCULATED_NUMBER_FORMAT " = ("
856 COLLECTED_NUMBER_FORMAT " - " COLLECTED_NUMBER_FORMAT
858 " * " CALCULATED_NUMBER_FORMAT
859 " / " CALCULATED_NUMBER_FORMAT
861 , rd->calculated_value
862 , rd->collected_value, rd->last_collected_value
863 , (calculated_number)rd->multiplier
864 , (calculated_number)rd->divisor
868 case RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL:
869 if(unlikely(rd->counter <= 1)) {
870 rd->calculated_value = 0;
874 // if the new is smaller than the old (an overflow, or reset), set the old equal to the new
875 // to reset the calculation (it will give zero as the calculation for this second)
876 if(unlikely(rd->last_collected_value > rd->collected_value)) {
877 debug(D_RRD_STATS, "%s.%s: RESET or OVERFLOW. Last collected value = " COLLECTED_NUMBER_FORMAT ", current = " COLLECTED_NUMBER_FORMAT
879 , rd->last_collected_value
880 , rd->collected_value);
882 if(!(rrddim_flag_check(rd, RRDDIM_FLAG_DONT_DETECT_RESETS_OR_OVERFLOWS)))
883 storage_flags = SN_EXISTS_RESET;
885 rd->last_collected_value = rd->collected_value;
888 // the percentage of the current increment
889 // over the increment of all dimensions together
890 if(unlikely(st->collected_total == st->last_collected_total))
891 rd->calculated_value = 0;
893 rd->calculated_value =
894 (calculated_number)100
895 * (calculated_number)(rd->collected_value - rd->last_collected_value)
896 / (calculated_number)(st->collected_total - st->last_collected_total);
898 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
899 debug(D_RRD_STATS, "%s/%s: CALC PCENT-DIFF "
900 CALCULATED_NUMBER_FORMAT " = 100"
901 " * (" COLLECTED_NUMBER_FORMAT " - " COLLECTED_NUMBER_FORMAT ")"
902 " / (" COLLECTED_NUMBER_FORMAT " - " COLLECTED_NUMBER_FORMAT ")"
904 , rd->calculated_value
905 , rd->collected_value, rd->last_collected_value
906 , st->collected_total, st->last_collected_total
911 // make the default zero, to make sure
912 // it gets noticed when we add new types
913 rd->calculated_value = 0;
915 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
916 debug(D_RRD_STATS, "%s/%s: CALC "
917 CALCULATED_NUMBER_FORMAT " = 0"
919 , rd->calculated_value
924 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
925 debug(D_RRD_STATS, "%s/%s: PHASE2 "
926 " last_collected_value = " COLLECTED_NUMBER_FORMAT
927 " collected_value = " COLLECTED_NUMBER_FORMAT
928 " last_calculated_value = " CALCULATED_NUMBER_FORMAT
929 " calculated_value = " CALCULATED_NUMBER_FORMAT
931 , rd->last_collected_value
932 , rd->collected_value
933 , rd->last_calculated_value
934 , rd->calculated_value
939 // at this point we have all the calculated values ready
940 // it is now time to interpolate values on a second boundary
942 if(unlikely(now_collect_ut < next_store_ut)) {
943 // this is collected in the same interpolation point
945 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
946 debug(D_RRD_STATS, "%s: THIS IS IN THE SAME INTERPOLATION POINT", st->name);
948 //#ifdef NETDATA_INTERNAL_CHECKS
949 // info("%s is collected in the same interpolation point: short by %llu microseconds", st->name, next_store_ut - now_collect_ut);
953 usec_t first_ut = last_stored_ut;
954 long long iterations = (now_collect_ut - last_stored_ut) / (update_every_ut);
955 if((now_collect_ut % (update_every_ut)) == 0) iterations++;
957 for( ; next_store_ut <= now_collect_ut ; last_collect_ut = next_store_ut, next_store_ut += update_every_ut, iterations-- ) {
958 //#ifdef NETDATA_INTERNAL_CHECKS
959 // 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); }
962 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG))) {
963 debug(D_RRD_STATS, "%s: last_stored_ut = %0.3Lf (last updated time)", st->name, (long double)last_stored_ut/1000000.0);
964 debug(D_RRD_STATS, "%s: next_store_ut = %0.3Lf (next interpolation point)", st->name, (long double)next_store_ut/1000000.0);
967 st->last_updated.tv_sec = (time_t) (next_store_ut / USEC_PER_SEC);
968 st->last_updated.tv_usec = 0;
970 rrddim_foreach_read(rd, st) {
971 calculated_number new_value;
973 switch(rd->algorithm) {
974 case RRD_ALGORITHM_INCREMENTAL:
975 new_value = (calculated_number)
976 ( rd->calculated_value
977 * (calculated_number)(next_store_ut - last_collect_ut)
978 / (calculated_number)(now_collect_ut - last_collect_ut)
981 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
982 debug(D_RRD_STATS, "%s/%s: CALC2 INC "
983 CALCULATED_NUMBER_FORMAT " = "
984 CALCULATED_NUMBER_FORMAT
989 , rd->calculated_value
990 , (next_store_ut - last_stored_ut)
991 , (now_collect_ut - last_stored_ut)
994 rd->calculated_value -= new_value;
995 new_value += rd->last_calculated_value;
996 rd->last_calculated_value = 0;
997 new_value /= (calculated_number)st->update_every;
999 if(unlikely(next_store_ut - last_stored_ut < update_every_ut)) {
1000 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1001 debug(D_RRD_STATS, "%s/%s: COLLECTION POINT IS SHORT " CALCULATED_NUMBER_FORMAT " - EXTRAPOLATING",
1003 , (calculated_number)(next_store_ut - last_stored_ut)
1005 new_value = new_value * (calculated_number)(st->update_every * 1000000) / (calculated_number)(next_store_ut - last_stored_ut);
1009 case RRD_ALGORITHM_ABSOLUTE:
1010 case RRD_ALGORITHM_PCENT_OVER_ROW_TOTAL:
1011 case RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL:
1013 if(iterations == 1) {
1014 // this is the last iteration
1015 // do not interpolate
1016 // just show the calculated value
1018 new_value = rd->calculated_value;
1021 // we have missed an update
1022 // interpolate in the middle values
1024 new_value = (calculated_number)
1025 ( ( (rd->calculated_value - rd->last_calculated_value)
1026 * (calculated_number)(next_store_ut - last_collect_ut)
1027 / (calculated_number)(now_collect_ut - last_collect_ut)
1029 + rd->last_calculated_value
1032 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1033 debug(D_RRD_STATS, "%s/%s: CALC2 DEF "
1034 CALCULATED_NUMBER_FORMAT " = ((("
1035 "(" CALCULATED_NUMBER_FORMAT " - " CALCULATED_NUMBER_FORMAT ")"
1037 " / %llu) + " CALCULATED_NUMBER_FORMAT
1040 , rd->calculated_value, rd->last_calculated_value
1041 , (next_store_ut - first_ut)
1042 , (now_collect_ut - first_ut), rd->last_calculated_value
1048 if(unlikely(!store_this_entry)) {
1049 rd->values[st->current_entry] = pack_storage_number(0, SN_NOT_EXISTS);
1053 if(likely(rrddim_flag_check(rd, RRDDIM_FLAG_UPDATED) && rd->counter > 1 && iterations < st->gap_when_lost_iterations_above)) {
1054 rd->values[st->current_entry] = pack_storage_number(new_value, storage_flags );
1055 rd->last_stored_value = new_value;
1057 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1058 debug(D_RRD_STATS, "%s/%s: STORE[%ld] "
1059 CALCULATED_NUMBER_FORMAT " = " CALCULATED_NUMBER_FORMAT
1062 , unpack_storage_number(rd->values[st->current_entry]), new_value
1066 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1067 debug(D_RRD_STATS, "%s/%s: STORE[%ld] = NON EXISTING "
1071 rd->values[st->current_entry] = pack_storage_number(0, SN_NOT_EXISTS);
1072 rd->last_stored_value = NAN;
1077 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG))) {
1078 calculated_number t1 = new_value * (calculated_number)rd->multiplier / (calculated_number)rd->divisor;
1079 calculated_number t2 = unpack_storage_number(rd->values[st->current_entry]);
1080 calculated_number accuracy = accuracy_loss(t1, t2);
1081 debug(D_RRD_STATS, "%s/%s: UNPACK[%ld] = " CALCULATED_NUMBER_FORMAT " FLAGS=0x%08x (original = " CALCULATED_NUMBER_FORMAT ", accuracy loss = " CALCULATED_NUMBER_FORMAT "%%%s)"
1085 , get_storage_number_flags(rd->values[st->current_entry])
1088 , (accuracy > ACCURACY_LOSS) ? " **TOO BIG** " : ""
1091 rd->collected_volume += t1;
1092 rd->stored_volume += t2;
1093 accuracy = accuracy_loss(rd->collected_volume, rd->stored_volume);
1094 debug(D_RRD_STATS, "%s/%s: VOLUME[%ld] = " CALCULATED_NUMBER_FORMAT ", calculated = " CALCULATED_NUMBER_FORMAT ", accuracy loss = " CALCULATED_NUMBER_FORMAT "%%%s"
1098 , rd->collected_volume
1100 , (accuracy > ACCURACY_LOSS) ? " **TOO BIG** " : ""
1105 // reset the storage flags for the next point, if any;
1106 storage_flags = SN_EXISTS;
1109 st->current_entry = ((st->current_entry + 1) >= st->entries) ? 0 : st->current_entry + 1;
1110 last_stored_ut = next_store_ut;
1113 st->last_collected_total = st->collected_total;
1115 rrddim_foreach_read(rd, st) {
1116 if(unlikely(!rrddim_flag_check(rd, RRDDIM_FLAG_UPDATED)))
1119 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1120 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);
1122 rd->last_collected_value = rd->collected_value;
1124 switch(rd->algorithm) {
1125 case RRD_ALGORITHM_INCREMENTAL:
1126 if(unlikely(!first_entry)) {
1127 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1128 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);
1129 rd->last_calculated_value += rd->calculated_value;
1132 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1133 debug(D_RRD_STATS, "%s: THIS IS THE FIRST POINT", st->name);
1137 case RRD_ALGORITHM_ABSOLUTE:
1138 case RRD_ALGORITHM_PCENT_OVER_ROW_TOTAL:
1139 case RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL:
1140 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1141 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);
1142 rd->last_calculated_value = rd->calculated_value;
1146 rd->calculated_value = 0;
1147 rd->collected_value = 0;
1148 rrddim_flag_clear(rd, RRDDIM_FLAG_UPDATED);
1150 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1151 debug(D_RRD_STATS, "%s/%s: END "
1152 " last_collected_value = " COLLECTED_NUMBER_FORMAT
1153 " collected_value = " COLLECTED_NUMBER_FORMAT
1154 " last_calculated_value = " CALCULATED_NUMBER_FORMAT
1155 " calculated_value = " CALCULATED_NUMBER_FORMAT
1157 , rd->last_collected_value
1158 , rd->collected_value
1159 , rd->last_calculated_value
1160 , rd->calculated_value
1164 // ALL DONE ABOUT THE DATA UPDATE
1165 // --------------------------------------------------------------------
1168 // find if there are any obsolete dimensions (not updated recently)
1169 if(unlikely(rrd_delete_unupdated_dimensions)) {
1171 for( rd = st->dimensions; likely(rd) ; rd = rd->next )
1172 if((rd->last_collected_time.tv_sec + (rrd_delete_unupdated_dimensions * st->update_every)) < st->last_collected_time.tv_sec)
1177 // there is dimension to free
1178 // upgrade our read lock to a write lock
1179 pthread_rwlock_unlock(&st->rrdset_rwlock);
1180 pthread_rwlock_wrlock(&st->rrdset_rwlock);
1182 for( rd = st->dimensions, last = NULL ; likely(rd) ; ) {
1183 // remove it only it is not updated in rrd_delete_unupdated_dimensions seconds
1185 if(unlikely((rd->last_collected_time.tv_sec + (rrd_delete_unupdated_dimensions * st->update_every)) < st->last_collected_time.tv_sec)) {
1186 info("Removing obsolete dimension '%s' (%s) of '%s' (%s).", rd->name, rd->id, st->name, st->id);
1188 if(unlikely(!last)) {
1189 st->dimensions = rd->next;
1191 rrddim_free(st, rd);
1192 rd = st->dimensions;
1196 last->next = rd->next;
1198 rrddim_free(st, rd);
1208 if(unlikely(!st->dimensions)) {
1209 info("Disabling chart %s (%s) since it does not have any dimensions", st->name, st->id);
1218 if(unlikely(pthread_setcancelstate(pthreadoldcancelstate, NULL) != 0))
1219 error("Cannot set pthread cancel state to RESTORE (%d).", pthreadoldcancelstate);
1221 if(unlikely(st->rrdhost->rrdpush_enabled))
1222 rrdset_done_push_int(st);