14 #include <sys/types.h>
19 #include "appconfig.h"
23 #define RRD_DEFAULT_GAP_INTERPOLATIONS 1
25 // ----------------------------------------------------------------------------
28 // if not zero it gives the time (in seconds) to remove un-updated dimensions
30 // if dimensions are removed, the chart generation will have to run again
31 int rrd_delete_unupdated_dimensions = 0;
33 int rrd_update_every = UPDATE_EVERY;
34 int rrd_default_history_entries = RRD_DEFAULT_HISTORY_ENTRIES;
36 RRDSET *rrdset_root = NULL;
37 pthread_rwlock_t rrdset_root_rwlock = PTHREAD_RWLOCK_INITIALIZER;
39 int rrd_memory_mode = RRD_MEMORY_MODE_SAVE;
42 // ----------------------------------------------------------------------------
45 static int rrdset_iterator(avl *a) { if(a) {}; return 0; }
47 static int rrdset_compare(void* a, void* b) {
48 if(((RRDSET *)a)->hash < ((RRDSET *)b)->hash) return -1;
49 else if(((RRDSET *)a)->hash > ((RRDSET *)b)->hash) return 1;
50 else return strcmp(((RRDSET *)a)->id, ((RRDSET *)b)->id);
53 avl_tree rrdset_root_index = {
56 #ifdef AVL_LOCK_WITH_MUTEX
57 PTHREAD_MUTEX_INITIALIZER
59 PTHREAD_RWLOCK_INITIALIZER
63 #define rrdset_index_add(st) avl_insert(&rrdset_root_index, (avl *)(st))
64 #define rrdset_index_del(st) avl_remove(&rrdset_root_index, (avl *)(st))
66 static RRDSET *rrdset_index_find(const char *id, uint32_t hash) {
67 RRDSET *result = NULL, tmp;
68 strncpy(tmp.id, id, RRD_ID_LENGTH_MAX);
69 tmp.id[RRD_ID_LENGTH_MAX] = '\0';
70 tmp.hash = (hash)?hash:simple_hash(tmp.id);
72 avl_search(&(rrdset_root_index), (avl *)&tmp, rrdset_iterator, (avl **)&result);
76 // ----------------------------------------------------------------------------
79 #define rrdset_from_avlname(avlname_ptr) ((RRDSET *)((avlname_ptr) - offsetof(RRDSET, avlname)))
81 static int rrdset_iterator_name(avl *a) { if(a) {}; return 0; }
83 static int rrdset_compare_name(void* a, void* b) {
84 RRDSET *A = rrdset_from_avlname(a);
85 RRDSET *B = rrdset_from_avlname(b);
87 // fprintf(stderr, "COMPARING: %s with %s\n", A->name, B->name);
89 if(A->hash_name < B->hash_name) return -1;
90 else if(A->hash_name > B->hash_name) return 1;
91 else return strcmp(A->name, B->name);
94 avl_tree rrdset_root_index_name = {
97 #ifdef AVL_LOCK_WITH_MUTEX
98 PTHREAD_MUTEX_INITIALIZER
100 PTHREAD_RWLOCK_INITIALIZER
104 int rrdset_index_add_name(RRDSET *st) {
105 // fprintf(stderr, "ADDING: %s (name: %s)\n", st->id, st->name);
106 return avl_insert(&rrdset_root_index_name, (avl *)(&st->avlname));
109 #define rrdset_index_del_name(st) avl_remove(&rrdset_root_index_name, (avl *)(&st->avlname))
111 static RRDSET *rrdset_index_find_name(const char *name, uint32_t hash) {
115 tmp.hash_name = (hash)?hash:simple_hash(tmp.name);
117 // fprintf(stderr, "SEARCHING: %s\n", name);
118 avl_search(&(rrdset_root_index_name), (avl *)(&(tmp.avlname)), rrdset_iterator_name, (avl **)&result);
120 RRDSET *st = rrdset_from_avlname(result);
121 if(strcmp(st->magic, RRDSET_MAGIC))
122 error("Search for RRDSET %s returned an invalid RRDSET %s (name %s)", name, st->id, st->name);
124 // fprintf(stderr, "FOUND: %s\n", name);
125 return rrdset_from_avlname(result);
127 // fprintf(stderr, "NOT FOUND: %s\n", name);
132 // ----------------------------------------------------------------------------
135 static int rrddim_iterator(avl *a) { if(a) {}; return 0; }
137 static int rrddim_compare(void* a, void* b) {
138 if(((RRDDIM *)a)->hash < ((RRDDIM *)b)->hash) return -1;
139 else if(((RRDDIM *)a)->hash > ((RRDDIM *)b)->hash) return 1;
140 else return strcmp(((RRDDIM *)a)->id, ((RRDDIM *)b)->id);
143 #define rrddim_index_add(st, rd) avl_insert(&((st)->dimensions_index), (avl *)(rd))
144 #define rrddim_index_del(st,rd ) avl_remove(&((st)->dimensions_index), (avl *)(rd))
146 static RRDDIM *rrddim_index_find(RRDSET *st, const char *id, uint32_t hash) {
147 RRDDIM *result = NULL, tmp;
148 strncpy(tmp.id, id, RRD_ID_LENGTH_MAX);
149 tmp.id[RRD_ID_LENGTH_MAX] = '\0';
150 tmp.hash = (hash)?hash:simple_hash(tmp.id);
152 avl_search(&(st->dimensions_index), (avl *)&tmp, rrddim_iterator, (avl **)&result);
156 // ----------------------------------------------------------------------------
159 int rrdset_type_id(const char *name)
161 if(unlikely(strcmp(name, RRDSET_TYPE_AREA_NAME) == 0)) return RRDSET_TYPE_AREA;
162 else if(unlikely(strcmp(name, RRDSET_TYPE_STACKED_NAME) == 0)) return RRDSET_TYPE_STACKED;
163 else if(unlikely(strcmp(name, RRDSET_TYPE_LINE_NAME) == 0)) return RRDSET_TYPE_LINE;
164 return RRDSET_TYPE_LINE;
167 const char *rrdset_type_name(int chart_type)
169 static char line[] = RRDSET_TYPE_LINE_NAME;
170 static char area[] = RRDSET_TYPE_AREA_NAME;
171 static char stacked[] = RRDSET_TYPE_STACKED_NAME;
174 case RRDSET_TYPE_LINE:
177 case RRDSET_TYPE_AREA:
180 case RRDSET_TYPE_STACKED:
186 // ----------------------------------------------------------------------------
189 const char *rrd_memory_mode_name(int id)
191 static const char ram[] = RRD_MEMORY_MODE_RAM_NAME;
192 static const char map[] = RRD_MEMORY_MODE_MAP_NAME;
193 static const char save[] = RRD_MEMORY_MODE_SAVE_NAME;
196 case RRD_MEMORY_MODE_RAM:
199 case RRD_MEMORY_MODE_MAP:
202 case RRD_MEMORY_MODE_SAVE:
210 int rrd_memory_mode_id(const char *name)
212 if(unlikely(!strcmp(name, RRD_MEMORY_MODE_RAM_NAME)))
213 return RRD_MEMORY_MODE_RAM;
214 else if(unlikely(!strcmp(name, RRD_MEMORY_MODE_MAP_NAME)))
215 return RRD_MEMORY_MODE_MAP;
217 return RRD_MEMORY_MODE_SAVE;
220 // ----------------------------------------------------------------------------
223 int rrddim_algorithm_id(const char *name)
225 if(strcmp(name, RRDDIM_ABSOLUTE_NAME) == 0) return RRDDIM_ABSOLUTE;
226 if(strcmp(name, RRDDIM_INCREMENTAL_NAME) == 0) return RRDDIM_INCREMENTAL;
227 if(strcmp(name, RRDDIM_PCENT_OVER_ROW_TOTAL_NAME) == 0) return RRDDIM_PCENT_OVER_ROW_TOTAL;
228 if(strcmp(name, RRDDIM_PCENT_OVER_DIFF_TOTAL_NAME) == 0) return RRDDIM_PCENT_OVER_DIFF_TOTAL;
229 return RRDDIM_ABSOLUTE;
232 const char *rrddim_algorithm_name(int chart_type)
234 static char absolute[] = RRDDIM_ABSOLUTE_NAME;
235 static char incremental[] = RRDDIM_INCREMENTAL_NAME;
236 static char percentage_of_absolute_row[] = RRDDIM_PCENT_OVER_ROW_TOTAL_NAME;
237 static char percentage_of_incremental_row[] = RRDDIM_PCENT_OVER_DIFF_TOTAL_NAME;
240 case RRDDIM_ABSOLUTE:
243 case RRDDIM_INCREMENTAL:
246 case RRDDIM_PCENT_OVER_ROW_TOTAL:
247 return percentage_of_absolute_row;
249 case RRDDIM_PCENT_OVER_DIFF_TOTAL:
250 return percentage_of_incremental_row;
255 // ----------------------------------------------------------------------------
258 char *rrdset_strncpy_name(char *to, const char *from, int length)
261 for(i = 0; i < length && from[i] ;i++) {
262 if(from[i] == '.' || isalpha(from[i]) || isdigit(from[i])) to[i] = from[i];
265 if(i < length) to[i] = '\0';
266 to[length - 1] = '\0';
271 void rrdset_set_name(RRDSET *st, const char *name)
273 debug(D_RRD_CALLS, "rrdset_set_name() old: %s, new: %s", st->name, name);
275 if(st->name) rrdset_index_del_name(st);
277 char b[CONFIG_MAX_VALUE + 1];
278 char n[RRD_ID_LENGTH_MAX + 1];
280 snprintf(n, RRD_ID_LENGTH_MAX, "%s.%s", st->type, name);
281 rrdset_strncpy_name(b, n, CONFIG_MAX_VALUE);
282 st->name = config_get(st->id, "name", b);
283 st->hash_name = simple_hash(st->name);
285 rrdset_index_add_name(st);
288 // ----------------------------------------------------------------------------
291 char *rrdset_cache_dir(const char *id)
295 static char *cache_dir = NULL;
296 if(!cache_dir) cache_dir = config_get("global", "cache directory", CACHE_DIR);
298 char b[FILENAME_MAX + 1];
299 char n[FILENAME_MAX + 1];
300 rrdset_strncpy_name(b, id, FILENAME_MAX);
302 snprintf(n, FILENAME_MAX, "%s/%s", cache_dir, b);
303 ret = config_get(id, "cache directory", n);
305 if(rrd_memory_mode == RRD_MEMORY_MODE_MAP || rrd_memory_mode == RRD_MEMORY_MODE_SAVE) {
306 int r = mkdir(ret, 0775);
307 if(r != 0 && errno != EEXIST)
308 error("Cannot create directory '%s'", ret);
314 // ----------------------------------------------------------------------------
317 void rrdset_reset(RRDSET *st)
319 debug(D_RRD_CALLS, "rrdset_reset() %s", st->name);
321 st->last_collected_time.tv_sec = 0;
322 st->last_collected_time.tv_usec = 0;
323 st->last_updated.tv_sec = 0;
324 st->last_updated.tv_usec = 0;
325 st->current_entry = 0;
327 st->counter_done = 0;
330 for(rd = st->dimensions; rd ; rd = rd->next) {
331 rd->last_collected_time.tv_sec = 0;
332 rd->last_collected_time.tv_usec = 0;
334 bzero(rd->values, rd->entries * sizeof(storage_number));
338 RRDSET *rrdset_create(const char *type, const char *id, const char *name, const char *family, const char *title, const char *units, long priority, int update_every, int chart_type)
341 fatal("Cannot create rrd stats without an id.");
345 char fullid[RRD_ID_LENGTH_MAX + 1];
346 char fullfilename[FILENAME_MAX + 1];
349 snprintf(fullid, RRD_ID_LENGTH_MAX, "%s.%s", type, id);
351 long entries = config_get_number(fullid, "history", rrd_default_history_entries);
352 if(entries < 5) entries = config_set_number(fullid, "history", 5);
353 if(entries > RRD_HISTORY_ENTRIES_MAX) entries = config_set_number(fullid, "history", RRD_HISTORY_ENTRIES_MAX);
355 int enabled = config_get_boolean(fullid, "enabled", 1);
356 if(!enabled) entries = 5;
358 unsigned long size = sizeof(RRDSET);
359 char *cache_dir = rrdset_cache_dir(fullid);
361 debug(D_RRD_CALLS, "Creating RRD_STATS for '%s.%s'.", type, id);
363 snprintf(fullfilename, FILENAME_MAX, "%s/main.db", cache_dir);
364 if(rrd_memory_mode != RRD_MEMORY_MODE_RAM) st = (RRDSET *)mymmap(fullfilename, size, ((rrd_memory_mode == RRD_MEMORY_MODE_MAP)?MAP_SHARED:MAP_PRIVATE), 0);
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((time(NULL) - st->last_updated.tv_sec) > update_every * entries) {
390 error("File %s is too old. Clearing it.", fullfilename);
401 st->dimensions = NULL;
403 st->mapped = rrd_memory_mode;
406 st = calloc(1, size);
408 fatal("Cannot allocate memory for RRD_STATS %s.%s", type, id);
411 st->mapped = RRD_MEMORY_MODE_RAM;
414 st->entries = entries;
415 st->update_every = update_every;
417 strcpy(st->cache_filename, fullfilename);
418 strcpy(st->magic, RRDSET_MAGIC);
420 strcpy(st->id, fullid);
421 st->hash = simple_hash(st->id);
423 st->cache_dir = cache_dir;
425 st->family = config_get(st->id, "family", family?family:st->id);
426 st->units = config_get(st->id, "units", units?units:"");
427 st->type = config_get(st->id, "type", type);
428 st->chart_type = rrdset_type_id(config_get(st->id, "chart type", rrdset_type_name(chart_type)));
430 st->priority = config_get_number(st->id, "priority", priority);
431 st->enabled = enabled;
436 st->last_collected_time.tv_sec = 0;
437 st->last_collected_time.tv_usec = 0;
438 st->counter_done = 0;
440 st->gap_when_lost_iterations_above = config_get_number(st->id, "gap when lost iterations above", RRD_DEFAULT_GAP_INTERPOLATIONS) + 2;
442 avl_init(&st->dimensions_index, rrddim_compare);
444 pthread_rwlock_init(&st->rwlock, NULL);
445 pthread_rwlock_wrlock(&rrdset_root_rwlock);
447 if(name && *name) rrdset_set_name(st, name);
448 else rrdset_set_name(st, id);
451 char varvalue[CONFIG_MAX_VALUE + 1];
452 snprintf(varvalue, CONFIG_MAX_VALUE, "%s (%s)", title?title:"", st->name);
453 st->title = config_get(st->id, "title", varvalue);
456 st->next = rrdset_root;
459 rrdset_index_add(st);
461 pthread_rwlock_unlock(&rrdset_root_rwlock);
466 RRDDIM *rrddim_add(RRDSET *st, const char *id, const char *name, long multiplier, long divisor, int algorithm)
468 char filename[FILENAME_MAX + 1];
469 char fullfilename[FILENAME_MAX + 1];
471 char varname[CONFIG_MAX_NAME + 1];
473 unsigned long size = sizeof(RRDDIM) + (st->entries * sizeof(storage_number));
475 debug(D_RRD_CALLS, "Adding dimension '%s/%s'.", st->id, id);
477 rrdset_strncpy_name(filename, id, FILENAME_MAX);
478 snprintf(fullfilename, FILENAME_MAX, "%s/%s.db", st->cache_dir, filename);
479 if(rrd_memory_mode != RRD_MEMORY_MODE_RAM) rd = (RRDDIM *)mymmap(fullfilename, size, ((rrd_memory_mode == RRD_MEMORY_MODE_MAP)?MAP_SHARED:MAP_PRIVATE), 1);
482 gettimeofday(&now, NULL);
484 if(strcmp(rd->magic, RRDDIMENSION_MAGIC) != 0) {
486 info("Initializing file %s.", fullfilename);
489 else if(rd->memsize != size) {
491 error("File %s does not have the desired size. Clearing it.", fullfilename);
494 else if(rd->multiplier != multiplier) {
496 error("File %s does not have the same multiplier. Clearing it.", fullfilename);
499 else if(rd->divisor != divisor) {
501 error("File %s does not have the same divisor. Clearing it.", fullfilename);
504 else if(rd->algorithm != algorithm) {
506 error("File %s does not have the same algorithm. Clearing it.", fullfilename);
509 else if(rd->update_every != st->update_every) {
511 error("File %s does not have the same refresh frequency. Clearing it.", fullfilename);
514 else if(usecdiff(&now, &rd->last_collected_time) > (rd->entries * rd->update_every * 1000000ULL)) {
516 error("File %s is too old. Clearing it.", fullfilename);
519 else if(strcmp(rd->id, id) != 0) {
521 error("File %s contents are not for dimension %s. Clearing it.", fullfilename, id);
529 // we have a file mapped for rd
530 rd->mapped = rrd_memory_mode;
531 rd->flags = 0x00000000;
536 // if we didn't manage to get a mmap'd dimension, just create one
538 rd = calloc(1, size);
540 fatal("Cannot allocate RRD_DIMENSION %s/%s.", st->id, id);
544 rd->mapped = RRD_MEMORY_MODE_RAM;
548 strcpy(rd->magic, RRDDIMENSION_MAGIC);
549 strcpy(rd->cache_filename, fullfilename);
550 strncpy(rd->id, id, RRD_ID_LENGTH_MAX);
551 rd->hash = simple_hash(rd->id);
553 snprintf(varname, CONFIG_MAX_NAME, "dim %s name", rd->id);
554 rd->name = config_get(st->id, varname, (name && *name)?name:rd->id);
556 snprintf(varname, CONFIG_MAX_NAME, "dim %s algorithm", rd->id);
557 rd->algorithm = rrddim_algorithm_id(config_get(st->id, varname, rrddim_algorithm_name(algorithm)));
559 snprintf(varname, CONFIG_MAX_NAME, "dim %s multiplier", rd->id);
560 rd->multiplier = config_get_number(st->id, varname, multiplier);
562 snprintf(varname, CONFIG_MAX_NAME, "dim %s divisor", rd->id);
563 rd->divisor = config_get_number(st->id, varname, divisor);
564 if(!rd->divisor) rd->divisor = 1;
566 rd->entries = st->entries;
567 rd->update_every = st->update_every;
569 // prevent incremental calculation spikes
572 // append this dimension
573 pthread_rwlock_wrlock(&st->rwlock);
577 RRDDIM *td = st->dimensions;
578 for(; td->next; td = td->next) ;
581 pthread_rwlock_unlock(&st->rwlock);
583 rrddim_index_add(st, rd);
588 void rrddim_set_name(RRDSET *st, RRDDIM *rd, const char *name)
590 debug(D_RRD_CALLS, "rrddim_set_name() %s.%s", st->name, rd->name);
592 char varname[CONFIG_MAX_NAME + 1];
593 snprintf(varname, CONFIG_MAX_NAME, "dim %s name", rd->id);
594 config_get(st->id, varname, name);
597 void rrddim_free(RRDSET *st, RRDDIM *rd)
599 debug(D_RRD_CALLS, "rrddim_free() %s.%s", st->name, rd->name);
601 RRDDIM *i = st->dimensions, *last = NULL;
602 for(i = st->dimensions; i && i != rd ; i = i->next) last = i;
605 error("Request to free dimension %s.%s but it is not linked.", st->id, rd->name);
609 if(last) last = i->next;
610 else st->dimensions = i->next;
612 rrddim_index_del(st, rd);
614 // free(rd->annotations);
615 if(rd->mapped == RRD_MEMORY_MODE_SAVE) {
616 debug(D_RRD_CALLS, "Saving dimension '%s' to '%s'.", rd->name, rd->cache_filename);
617 savememory(rd->cache_filename, rd, rd->memsize);
619 debug(D_RRD_CALLS, "Unmapping dimension '%s'.", rd->name);
620 munmap(rd, rd->memsize);
622 else if(rd->mapped == RRD_MEMORY_MODE_MAP) {
623 debug(D_RRD_CALLS, "Unmapping dimension '%s'.", rd->name);
624 munmap(rd, rd->memsize);
627 debug(D_RRD_CALLS, "Removing dimension '%s'.", rd->name);
632 void rrdset_free_all(void)
634 info("Freeing all memory...");
637 for(st = rrdset_root; st ;) {
638 RRDSET *next = st->next;
640 while(st->dimensions)
641 rrddim_free(st, st->dimensions);
643 rrdset_index_del(st);
645 if(st->mapped == RRD_MEMORY_MODE_SAVE) {
646 debug(D_RRD_CALLS, "Saving stats '%s' to '%s'.", st->name, st->cache_filename);
647 savememory(st->cache_filename, st, st->memsize);
649 debug(D_RRD_CALLS, "Unmapping stats '%s'.", st->name);
650 munmap(st, st->memsize);
652 else if(st->mapped == RRD_MEMORY_MODE_MAP) {
653 debug(D_RRD_CALLS, "Unmapping stats '%s'.", st->name);
654 munmap(st, st->memsize);
663 info("Memory cleanup completed...");
666 void rrdset_save_all(void)
668 debug(D_RRD_CALLS, "rrdset_save_all()");
673 pthread_rwlock_wrlock(&rrdset_root_rwlock);
674 for(st = rrdset_root; st ; st = st->next) {
675 pthread_rwlock_wrlock(&st->rwlock);
677 if(st->mapped == RRD_MEMORY_MODE_SAVE) {
678 debug(D_RRD_CALLS, "Saving stats '%s' to '%s'.", st->name, st->cache_filename);
679 savememory(st->cache_filename, st, st->memsize);
682 for(rd = st->dimensions; rd ; rd = rd->next) {
683 if(likely(rd->mapped == RRD_MEMORY_MODE_SAVE)) {
684 debug(D_RRD_CALLS, "Saving dimension '%s' to '%s'.", rd->name, rd->cache_filename);
685 savememory(rd->cache_filename, rd, rd->memsize);
689 pthread_rwlock_unlock(&st->rwlock);
691 pthread_rwlock_unlock(&rrdset_root_rwlock);
695 RRDSET *rrdset_find(const char *id)
697 debug(D_RRD_CALLS, "rrdset_find() for chart %s", id);
699 RRDSET *st = rrdset_index_find(id, 0);
703 RRDSET *rrdset_find_bytype(const char *type, const char *id)
705 debug(D_RRD_CALLS, "rrdset_find_bytype() for chart %s.%s", type, id);
707 char buf[RRD_ID_LENGTH_MAX + 1];
709 strncpy(buf, type, RRD_ID_LENGTH_MAX - 1);
710 buf[RRD_ID_LENGTH_MAX - 1] = '\0';
712 int len = strlen(buf);
713 strncpy(&buf[len], id, RRD_ID_LENGTH_MAX - len);
714 buf[RRD_ID_LENGTH_MAX] = '\0';
716 return(rrdset_find(buf));
719 RRDSET *rrdset_find_byname(const char *name)
721 debug(D_RRD_CALLS, "rrdset_find_byname() for chart %s", name);
723 RRDSET *st = rrdset_index_find_name(name, 0);
727 RRDDIM *rrddim_find(RRDSET *st, const char *id)
729 debug(D_RRD_CALLS, "rrddim_find() for chart %s, dimension %s", st->name, id);
731 return rrddim_index_find(st, id, 0);
734 int rrddim_hide(RRDSET *st, const char *id)
736 debug(D_RRD_CALLS, "rrddim_hide() for chart %s, dimension %s", st->name, id);
738 RRDDIM *rd = rrddim_find(st, id);
740 error("Cannot find dimension with id '%s' on stats '%s' (%s).", id, st->name, st->id);
744 rd->flags |= RRDDIM_FLAG_HIDDEN;
748 int rrddim_unhide(RRDSET *st, const char *id)
750 debug(D_RRD_CALLS, "rrddim_unhide() for chart %s, dimension %s", st->name, id);
752 RRDDIM *rd = rrddim_find(st, id);
754 error("Cannot find dimension with id '%s' on stats '%s' (%s).", id, st->name, st->id);
758 if(rd->flags & RRDDIM_FLAG_HIDDEN) rd->flags ^= RRDDIM_FLAG_HIDDEN;
762 collected_number rrddim_set_by_pointer(RRDSET *st, RRDDIM *rd, collected_number value)
764 debug(D_RRD_CALLS, "rrddim_set_by_pointer() for chart %s, dimension %s, value " COLLECTED_NUMBER_FORMAT, st->name, rd->name, value);
766 gettimeofday(&rd->last_collected_time, NULL);
767 rd->collected_value = value;
771 return rd->last_collected_value;
774 collected_number rrddim_set(RRDSET *st, const char *id, collected_number value)
776 RRDDIM *rd = rrddim_find(st, id);
778 error("Cannot find dimension with id '%s' on stats '%s' (%s).", id, st->name, st->id);
782 return rrddim_set_by_pointer(st, rd, value);
785 void rrdset_next_usec(RRDSET *st, unsigned long long microseconds)
787 if(!microseconds) rrdset_next(st);
789 debug(D_RRD_CALLS, "rrdset_next_usec() for chart %s with microseconds %llu", st->name, microseconds);
791 if(unlikely(st->debug)) debug(D_RRD_STATS, "%s: NEXT: %llu microseconds", st->name, microseconds);
792 st->usec_since_last_update = microseconds;
796 void rrdset_next(RRDSET *st)
798 unsigned long long microseconds = 0;
800 if(likely(st->last_collected_time.tv_sec)) {
802 gettimeofday(&now, NULL);
803 microseconds = usecdiff(&now, &st->last_collected_time);
806 rrdset_next_usec(st, microseconds);
809 void rrdset_next_plugins(RRDSET *st)
814 unsigned long long rrdset_done(RRDSET *st)
816 debug(D_RRD_CALLS, "rrdset_done() for chart %s", st->name);
819 int oldstate, store_this_entry = 1;
821 if(unlikely(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &oldstate) != 0))
822 error("Cannot set pthread cancel state to DISABLE.");
824 // a read lock is OK here
825 pthread_rwlock_rdlock(&st->rwlock);
827 // enable the chart, if it was disabled
830 // check if the chart has a long time to be refreshed
831 if(unlikely(st->usec_since_last_update > st->entries * st->update_every * 1000000ULL)) {
832 info("%s: took too long to be updated (%0.3Lf secs). Reseting it.", st->name, (long double)(st->usec_since_last_update / 1000000.0));
834 st->usec_since_last_update = st->update_every * 1000000ULL;
836 if(unlikely(st->debug)) debug(D_RRD_STATS, "%s: microseconds since last update: %llu", st->name, st->usec_since_last_update);
838 // set last_collected_time
839 if(unlikely(!st->last_collected_time.tv_sec)) {
840 // it is the first entry
841 // set the last_collected_time to now
842 gettimeofday(&st->last_collected_time, NULL);
844 // the first entry should not be stored
845 store_this_entry = 0;
847 if(unlikely(st->debug)) debug(D_RRD_STATS, "%s: initializing last_collected to now. Will not store the next entry.", st->name);
850 // it is not the first entry
851 // calculate the proper last_collected_time, using usec_since_last_update
852 unsigned long long ut = st->last_collected_time.tv_sec * 1000000ULL + st->last_collected_time.tv_usec + st->usec_since_last_update;
853 st->last_collected_time.tv_sec = ut / 1000000ULL;
854 st->last_collected_time.tv_usec = ut % 1000000ULL;
857 // if this set has not been updated in the past
858 // we fake the last_update time to be = now - usec_since_last_update
859 if(unlikely(!st->last_updated.tv_sec)) {
860 // it has never been updated before
861 // set a fake last_updated, in the past using usec_since_last_update
862 unsigned long long ut = st->last_collected_time.tv_sec * 1000000ULL + st->last_collected_time.tv_usec - st->usec_since_last_update;
863 st->last_updated.tv_sec = ut / 1000000ULL;
864 st->last_updated.tv_usec = ut % 1000000ULL;
866 // the first entry should not be stored
867 store_this_entry = 0;
869 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);
872 // check if we will re-write the entire data set
873 if(unlikely(usecdiff(&st->last_collected_time, &st->last_updated) > st->update_every * st->entries * 1000000ULL)) {
874 info("%s: too old data (last updated at %u.%u, last collected at %u.%u). Reseting 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);
877 st->usec_since_last_update = st->update_every * 1000000ULL;
879 gettimeofday(&st->last_collected_time, NULL);
881 unsigned long long ut = st->last_collected_time.tv_sec * 1000000ULL + st->last_collected_time.tv_usec - st->usec_since_last_update;
882 st->last_updated.tv_sec = ut / 1000000ULL;
883 st->last_updated.tv_usec = ut % 1000000ULL;
885 // the first entry should not be stored
886 store_this_entry = 0;
889 // these are the 3 variables that will help us in interpolation
890 // last_ut = the last time we added a value to the storage
891 // now_ut = the time the current value is taken at
892 // next_ut = the time of the next interpolation point
893 unsigned long long last_ut = st->last_updated.tv_sec * 1000000ULL + st->last_updated.tv_usec;
894 unsigned long long now_ut = st->last_collected_time.tv_sec * 1000000ULL + st->last_collected_time.tv_usec;
895 unsigned long long next_ut = (st->last_updated.tv_sec + st->update_every) * 1000000ULL;
897 if(unlikely(st->debug)) {
898 debug(D_RRD_STATS, "%s: last ut = %0.3Lf (last updated time)", st->name, (long double)last_ut/1000000.0);
899 debug(D_RRD_STATS, "%s: now ut = %0.3Lf (current update time)", st->name, (long double)now_ut/1000000.0);
900 debug(D_RRD_STATS, "%s: next ut = %0.3Lf (next interpolation point)", st->name, (long double)next_ut/1000000.0);
903 if(unlikely(!st->counter_done)) {
904 store_this_entry = 0;
905 if(unlikely(st->debug)) debug(D_RRD_STATS, "%s: Will not store the next entry.", st->name);
909 // calculate totals and count the dimensions
911 st->collected_total = 0;
912 for( rd = st->dimensions, dimensions = 0 ; likely(rd) ; rd = rd->next, dimensions++ )
913 st->collected_total += rd->collected_value;
915 uint32_t storage_flags = SN_EXISTS;
917 // process all dimensions to calculate their values
918 // based on the collected figures only
919 // at this stage we do not interpolate anything
920 for( rd = st->dimensions ; likely(rd) ; rd = rd->next ) {
922 if(unlikely(!rd->updated || rd->counter <= 1)) {
923 rd->calculated_value = 0;
927 if(unlikely(st->debug)) debug(D_RRD_STATS, "%s/%s: "
928 " last_collected_value = " COLLECTED_NUMBER_FORMAT
929 " collected_value = " COLLECTED_NUMBER_FORMAT
930 " last_calculated_value = " CALCULATED_NUMBER_FORMAT
931 " calculated_value = " CALCULATED_NUMBER_FORMAT
933 , rd->last_collected_value
934 , rd->collected_value
935 , rd->last_calculated_value
936 , rd->calculated_value
939 switch(rd->algorithm) {
940 case RRDDIM_PCENT_OVER_DIFF_TOTAL:
941 // the percentage of the current increment
942 // over the increment of all dimensions together
943 if(unlikely(st->collected_total == st->last_collected_total)) rd->calculated_value = rd->last_calculated_value;
944 else rd->calculated_value =
945 (calculated_number)100
946 * (calculated_number)(rd->collected_value - rd->last_collected_value)
947 / (calculated_number)(st->collected_total - st->last_collected_total);
949 if(unlikely(st->debug))
950 debug(D_RRD_STATS, "%s/%s: CALC PCENT-DIFF "
951 CALCULATED_NUMBER_FORMAT " = 100"
952 " * (" COLLECTED_NUMBER_FORMAT " - " COLLECTED_NUMBER_FORMAT ")"
953 " / (" COLLECTED_NUMBER_FORMAT " - " COLLECTED_NUMBER_FORMAT ")"
955 , rd->calculated_value
956 , rd->collected_value, rd->last_collected_value
957 , st->collected_total, st->last_collected_total
961 case RRDDIM_PCENT_OVER_ROW_TOTAL:
962 if(unlikely(!st->collected_total)) rd->calculated_value = 0;
964 // the percentage of the current value
965 // over the total of all dimensions
966 rd->calculated_value =
967 (calculated_number)100
968 * (calculated_number)rd->collected_value
969 / (calculated_number)st->collected_total;
971 if(unlikely(st->debug))
972 debug(D_RRD_STATS, "%s/%s: CALC PCENT-ROW "
973 CALCULATED_NUMBER_FORMAT " = 100"
974 " * " COLLECTED_NUMBER_FORMAT
975 " / " COLLECTED_NUMBER_FORMAT
977 , rd->calculated_value
978 , rd->collected_value
979 , st->collected_total
983 case RRDDIM_INCREMENTAL:
984 // if the new is smaller than the old (an overflow, or reset), set the old equal to the new
985 // to reset the calculation (it will give zero as the calculation for this second)
986 if(unlikely(rd->last_collected_value > rd->collected_value)) {
987 debug(D_RRD_STATS, "%s.%s: RESET or OVERFLOW. Last collected value = " COLLECTED_NUMBER_FORMAT ", current = " COLLECTED_NUMBER_FORMAT
989 , rd->last_collected_value
990 , rd->collected_value);
991 if(!(rd->flags & RRDDIM_FLAG_DONT_DETECT_RESETS_OR_OVERFLOWS)) storage_flags = SN_EXISTS_RESET;
992 rd->last_collected_value = rd->collected_value;
995 rd->calculated_value += (calculated_number)(rd->collected_value - rd->last_collected_value)
996 * (calculated_number)rd->multiplier
997 / (calculated_number)rd->divisor;
999 if(unlikely(st->debug))
1000 debug(D_RRD_STATS, "%s/%s: CALC INC "
1001 CALCULATED_NUMBER_FORMAT " += ("
1002 COLLECTED_NUMBER_FORMAT " - " COLLECTED_NUMBER_FORMAT
1007 , rd->calculated_value
1008 , rd->collected_value, rd->last_collected_value
1009 , (calculated_number)rd->multiplier
1010 , (calculated_number)rd->divisor
1014 case RRDDIM_ABSOLUTE:
1015 rd->calculated_value = (calculated_number)rd->collected_value
1016 * (calculated_number)rd->multiplier
1017 / (calculated_number)rd->divisor;
1019 if(unlikely(st->debug))
1020 debug(D_RRD_STATS, "%s/%s: CALC ABS/ABS-NO-IN "
1021 CALCULATED_NUMBER_FORMAT " = "
1022 COLLECTED_NUMBER_FORMAT
1026 , rd->calculated_value
1027 , rd->collected_value
1028 , (calculated_number)rd->multiplier
1029 , (calculated_number)rd->divisor
1034 // make the default zero, to make sure
1035 // it gets noticed when we add new types
1036 rd->calculated_value = 0;
1038 if(unlikely(st->debug))
1039 debug(D_RRD_STATS, "%s/%s: CALC "
1040 CALCULATED_NUMBER_FORMAT " = 0"
1042 , rd->calculated_value
1048 // at this point we have all the calculated values ready
1049 // it is now time to interpolate values on a second boundary
1051 unsigned long long first_ut = last_ut;
1052 int iterations = (now_ut - last_ut) / (st->update_every * 1000000ULL);
1054 for( ; likely(next_ut <= now_ut) ; next_ut += st->update_every * 1000000ULL, iterations-- ) {
1055 #ifdef NETDATA_INTERNAL_CHECKS
1056 if(iterations <= 0) error("iterations calculation wrapped!");
1059 if(unlikely(st->debug)) {
1060 debug(D_RRD_STATS, "%s: last ut = %0.3Lf (last updated time)", st->name, (long double)last_ut/1000000.0);
1061 debug(D_RRD_STATS, "%s: next ut = %0.3Lf (next interpolation point)", st->name, (long double)next_ut/1000000.0);
1064 st->last_updated.tv_sec = next_ut / 1000000ULL;
1065 st->last_updated.tv_usec = 0;
1067 for( rd = st->dimensions ; likely(rd) ; rd = rd->next ) {
1068 calculated_number new_value;
1070 switch(rd->algorithm) {
1071 case RRDDIM_INCREMENTAL:
1072 new_value = (calculated_number)
1073 ( rd->calculated_value
1074 * (calculated_number)(next_ut - last_ut)
1075 / (calculated_number)(now_ut - last_ut)
1078 if(unlikely(st->debug))
1079 debug(D_RRD_STATS, "%s/%s: CALC2 INC "
1080 CALCULATED_NUMBER_FORMAT " = "
1081 CALCULATED_NUMBER_FORMAT
1086 , rd->calculated_value
1087 , (unsigned long long)(next_ut - last_ut)
1088 , (unsigned long long)(now_ut - last_ut)
1091 rd->calculated_value -= new_value;
1092 new_value /= (calculated_number)st->update_every;
1095 case RRDDIM_ABSOLUTE:
1096 case RRDDIM_PCENT_OVER_ROW_TOTAL:
1097 case RRDDIM_PCENT_OVER_DIFF_TOTAL:
1099 if(iterations == 1) {
1100 // this is the last iteration
1101 // do not interpolate
1102 // just show the calculated value
1104 new_value = rd->calculated_value;
1107 // we have missed an update
1108 // interpolate in the middle values
1110 new_value = (calculated_number)
1111 ( ( (rd->calculated_value - rd->last_calculated_value)
1112 * (calculated_number)(next_ut - first_ut)
1113 / (calculated_number)(now_ut - first_ut)
1115 + rd->last_calculated_value
1118 if(unlikely(st->debug))
1119 debug(D_RRD_STATS, "%s/%s: CALC2 DEF "
1120 CALCULATED_NUMBER_FORMAT " = ((("
1121 "(" CALCULATED_NUMBER_FORMAT " - " CALCULATED_NUMBER_FORMAT ")"
1123 " / %llu) + " CALCULATED_NUMBER_FORMAT
1126 , rd->calculated_value, rd->last_calculated_value
1127 , (next_ut - first_ut)
1128 , (now_ut - first_ut), rd->last_calculated_value
1132 // it fades the value towards the target
1133 // while we know the calculated value is different
1134 // if(likely(next_ut + st->update_every * 1000000ULL > now_ut)) rd->calculated_value = new_value;
1139 if(unlikely(!store_this_entry)) {
1140 store_this_entry = 1;
1144 if(likely(rd->updated && rd->counter > 1 && iterations < st->gap_when_lost_iterations_above)) {
1145 rd->values[st->current_entry] = pack_storage_number(new_value, storage_flags );
1147 if(unlikely(st->debug))
1148 debug(D_RRD_STATS, "%s/%s: STORE[%ld] "
1149 CALCULATED_NUMBER_FORMAT " = " CALCULATED_NUMBER_FORMAT
1152 , unpack_storage_number(rd->values[st->current_entry]), new_value
1156 if(unlikely(st->debug)) debug(D_RRD_STATS, "%s/%s: STORE[%ld] = NON EXISTING "
1160 rd->values[st->current_entry] = pack_storage_number(0, SN_NOT_EXISTS);
1163 if(unlikely(st->debug)) {
1164 calculated_number t1 = new_value * (calculated_number)rd->multiplier / (calculated_number)rd->divisor;
1165 calculated_number t2 = unpack_storage_number(rd->values[st->current_entry]);
1166 calculated_number accuracy = accuracy_loss(t1, t2);
1167 debug(D_RRD_STATS, "%s/%s: UNPACK[%ld] = " CALCULATED_NUMBER_FORMAT " FLAGS=0x%08x (original = " CALCULATED_NUMBER_FORMAT ", accuracy loss = " CALCULATED_NUMBER_FORMAT "%%%s)"
1171 , get_storage_number_flags(rd->values[st->current_entry])
1174 , (accuracy > ACCURACY_LOSS) ? " **TOO BIG** " : ""
1177 rd->collected_volume += t1;
1178 rd->stored_volume += t2;
1179 accuracy = accuracy_loss(rd->collected_volume, rd->stored_volume);
1180 debug(D_RRD_STATS, "%s/%s: VOLUME[%ld] = " CALCULATED_NUMBER_FORMAT ", calculated = " CALCULATED_NUMBER_FORMAT ", accuracy loss = " CALCULATED_NUMBER_FORMAT "%%%s"
1184 , rd->collected_volume
1186 , (accuracy > ACCURACY_LOSS) ? " **TOO BIG** " : ""
1191 // reset the storage flags for the next point, if any;
1192 storage_flags = SN_EXISTS;
1195 st->current_entry = ((st->current_entry + 1) >= st->entries) ? 0 : st->current_entry + 1;
1199 for( rd = st->dimensions; likely(rd) ; rd = rd->next ) {
1200 if(unlikely(!rd->updated)) continue;
1201 rd->last_collected_value = rd->collected_value;
1202 rd->last_calculated_value = rd->calculated_value;
1203 rd->collected_value = 0;
1206 // if this is the first entry of incremental dimensions
1207 // we have to set the first calculated_value to zero
1208 // to eliminate the first spike
1209 if(unlikely(st->counter_done == 1)) switch(rd->algorithm) {
1210 case RRDDIM_PCENT_OVER_DIFF_TOTAL:
1211 case RRDDIM_INCREMENTAL:
1212 rd->calculated_value = 0;
1213 // the next time, a new incremental total will be calculated
1217 st->last_collected_total = st->collected_total;
1219 // ALL DONE ABOUT THE DATA UPDATE
1220 // --------------------------------------------------------------------
1222 // find if there are any obsolete dimensions (not updated recently)
1223 if(unlikely(rrd_delete_unupdated_dimensions)) {
1225 for( rd = st->dimensions; likely(rd) ; rd = rd->next )
1226 if((rd->last_collected_time.tv_sec + (rrd_delete_unupdated_dimensions * st->update_every)) < st->last_collected_time.tv_sec)
1230 // there is dimension to free
1231 // upgrade our read lock to a write lock
1232 pthread_rwlock_unlock(&st->rwlock);
1233 pthread_rwlock_wrlock(&st->rwlock);
1235 for( rd = st->dimensions, last = NULL ; likely(rd) ; ) {
1236 // remove it only it is not updated in rrd_delete_unupdated_dimensions seconds
1238 if(unlikely((rd->last_collected_time.tv_sec + (rrd_delete_unupdated_dimensions * st->update_every)) < st->last_collected_time.tv_sec)) {
1239 info("Removing obsolete dimension '%s' (%s) of '%s' (%s).", rd->name, rd->id, st->name, st->id);
1241 if(unlikely(!last)) {
1242 st->dimensions = rd->next;
1244 rrddim_free(st, rd);
1245 rd = st->dimensions;
1249 last->next = rd->next;
1251 rrddim_free(st, rd);
1261 if(unlikely(!st->dimensions)) {
1262 info("Disabling chart %s (%s) since it does not have any dimensions", st->name, st->id);
1268 pthread_rwlock_unlock(&st->rwlock);
1270 if(unlikely(pthread_setcancelstate(oldstate, NULL) != 0))
1271 error("Cannot set pthread cancel state to RESTORE (%d).", oldstate);
1273 return(st->usec_since_last_update);