src/rrdset.c

   1 #define NETDATA_RRD_INTERNALS 1
   2 #include "common.h"
   3
   4 #define RRD_DEFAULT_GAP_INTERPOLATIONS 1
   5
   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);
   8
   9     int ret = pthread_rwlock_trywrlock(&st->rrdset_rwlock);
  10     if(ret == 0)
  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);
  12 }
  13
  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);
  16
  17     int ret = pthread_rwlock_tryrdlock(&st->rrdset_rwlock);
  18     if(ret == 0)
  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);
  20 }
  21
  22
  23 // ----------------------------------------------------------------------------
  24 // RRDSET index
  25
  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);
  30 }
  31
  32 static RRDSET *rrdset_index_find(RRDHOST *host, const char *id, uint32_t hash) {
  33     RRDSET tmp;
  34     strncpyz(tmp.id, id, RRD_ID_LENGTH_MAX);
  35     tmp.hash = (hash)?hash:simple_hash(tmp.id);
  36
  37     return (RRDSET *)avl_search_lock(&(host->rrdset_root_index), (avl *) &tmp);
  38 }
  39
  40 // ----------------------------------------------------------------------------
  41 // RRDSET name index
  42
  43 #define rrdset_from_avlname(avlname_ptr) ((RRDSET *)((avlname_ptr) - offsetof(RRDSET, avlname)))
  44
  45 int rrdset_compare_name(void* a, void* b) {
  46     RRDSET *A = rrdset_from_avlname(a);
  47     RRDSET *B = rrdset_from_avlname(b);
  48
  49     // fprintf(stderr, "COMPARING: %s with %s\n", A->name, B->name);
  50
  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);
  54 }
  55
  56 RRDSET *rrdset_index_add_name(RRDHOST *host, RRDSET *st) {
  57     void *result;
  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);
  61     return NULL;
  62 }
  63
  64 RRDSET *rrdset_index_del_name(RRDHOST *host, RRDSET *st) {
  65     void *result;
  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);
  69     return NULL;
  70 }
  71
  72
  73 // ----------------------------------------------------------------------------
  74 // RRDSET - find charts
  75
  76 static inline RRDSET *rrdset_index_find_name(RRDHOST *host, const char *name, uint32_t hash) {
  77     void *result = NULL;
  78     RRDSET tmp;
  79     tmp.name = name;
  80     tmp.hash_name = (hash)?hash:simple_hash(tmp.name);
  81
  82     // fprintf(stderr, "SEARCHING: %s\n", name);
  83     result = avl_search_lock(&host->rrdset_root_index_name, (avl *) (&(tmp.avlname)));
  84     if(result) {
  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);
  88
  89         // fprintf(stderr, "FOUND: %s\n", name);
  90         return rrdset_from_avlname(result);
  91     }
  92     // fprintf(stderr, "NOT FOUND: %s\n", name);
  93     return NULL;
  94 }
  95
  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);
  99     return(st);
 100 }
 101
 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);
 104
 105     char buf[RRD_ID_LENGTH_MAX + 1];
 106     strncpyz(buf, type, RRD_ID_LENGTH_MAX - 1);
 107     strcat(buf, ".");
 108     int len = (int) strlen(buf);
 109     strncpyz(&buf[len], id, (size_t) (RRD_ID_LENGTH_MAX - len));
 110
 111     return(rrdset_find(host, buf));
 112 }
 113
 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);
 117     return(st);
 118 }
 119
 120 // ----------------------------------------------------------------------------
 121 // RRDSET - rename charts
 122
 123 char *rrdset_strncpyz_name(char *to, const char *from, size_t length) {
 124     char c, *p = to;
 125
 126     while (length-- && (c = *from++)) {
 127         if(c != '.' && !isalnum(c))
 128             c = '_';
 129
 130         *p++ = c;
 131     }
 132
 133     *p = '\0';
 134
 135     return to;
 136 }
 137
 138 void rrdset_set_name(RRDSET *st, const char *name) {
 139     if(unlikely(st->name && !strcmp(st->name, name)))
 140         return;
 141
 142     debug(D_RRD_CALLS, "rrdset_set_name() old: %s, new: %s", st->name, name);
 143
 144     char b[CONFIG_MAX_VALUE + 1];
 145     char n[RRD_ID_LENGTH_MAX + 1];
 146
 147     snprintfz(n, RRD_ID_LENGTH_MAX, "%s.%s", st->type, name);
 148     rrdset_strncpyz_name(b, n, CONFIG_MAX_VALUE);
 149
 150     if(st->name) {
 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);
 155     }
 156     else {
 157         st->name = config_get(st->config_section, "name", b);
 158         st->hash_name = simple_hash(st->name);
 159     }
 160
 161     rrdset_wrlock(st);
 162     RRDDIM *rd;
 163     rrddim_foreach_write(rd, st)
 164         rrddimvar_rename_all(rd);
 165     rrdset_unlock(st);
 166
 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);
 169 }
 170
 171
 172 // ----------------------------------------------------------------------------
 173 // RRDSET - reset a chart
 174
 175 void rrdset_reset(RRDSET *st) {
 176     debug(D_RRD_CALLS, "rrdset_reset() %s", st->name);
 177
 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;
 183     st->counter = 0;
 184     st->counter_done = 0;
 185
 186     RRDDIM *rd;
 187     rrddim_foreach_read(rd, st) {
 188         rd->last_collected_time.tv_sec = 0;
 189         rd->last_collected_time.tv_usec = 0;
 190         rd->collections_counter = 0;
 191         memset(rd->values, 0, rd->entries * sizeof(storage_number));
 192     }
 193 }
 194
 195 // ----------------------------------------------------------------------------
 196 // RRDSET - helpers for rrdset_create()
 197
 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;
 201
 202     if(unlikely(mode == RRD_MEMORY_MODE_NONE || mode == RRD_MEMORY_MODE_RAM))
 203         return entries;
 204
 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);
 209         size += page;
 210
 211         long n = (size - sizeof(RRDDIM)) / sizeof(storage_number);
 212         return n;
 213     }
 214
 215     return entries;
 216 }
 217
 218 static inline void last_collected_time_align(struct timeval *tv, int update_every) {
 219     tv->tv_sec -= tv->tv_sec % update_every;
 220     tv->tv_usec = 500000;
 221 }
 222
 223 static inline void last_updated_time_align(struct timeval *tv, int update_every) {
 224     tv->tv_sec -= tv->tv_sec % update_every;
 225     tv->tv_usec = 0;
 226 }
 227
 228 // ----------------------------------------------------------------------------
 229 // RRDSET - free a chart
 230
 231 void rrdset_free(RRDSET *st) {
 232     if(unlikely(!st)) return;
 233
 234     rrdhost_check_wrlock(st->rrdhost);  // make sure we have a write lock on the host
 235     rrdset_wrlock(st);                  // lock this RRDSET
 236
 237     // ------------------------------------------------------------------------
 238     // free its children structures
 239
 240     while(st->variables)  rrdsetvar_free(st->variables);
 241     while(st->alarms)     rrdsetcalc_unlink(st->alarms);
 242     while(st->dimensions) rrddim_free(st, st->dimensions);
 243
 244     rrdfamily_free(st->rrdhost, st->rrdfamily);
 245
 246     // ------------------------------------------------------------------------
 247     // remove it from the indexes
 248
 249     if(unlikely(rrdset_index_del(st->rrdhost, st) != st))
 250         error("RRDSET: INTERNAL ERROR: attempt to remove from index chart '%s', removed a different chart.", st->id);
 251
 252     rrdset_index_del_name(st->rrdhost, st);
 253
 254     // ------------------------------------------------------------------------
 255     // unlink it from the host
 256
 257     if(st == st->rrdhost->rrdset_root) {
 258         st->rrdhost->rrdset_root = st->next;
 259     }
 260     else {
 261         // find the previous one
 262         RRDSET *s;
 263         for(s = st->rrdhost->rrdset_root; s && s->next != st ; s = s->next) ;
 264
 265         // bypass it
 266         if(s) s->next = st->next;
 267         else error("Request to free RRDSET '%s': cannot find it under host '%s'", st->id, st->rrdhost->hostname);
 268     }
 269
 270     rrdset_unlock(st);
 271
 272     // ------------------------------------------------------------------------
 273     // free it
 274
 275     // free directly allocated members
 276     freez(st->config_section);
 277
 278     if(st->rrd_memory_mode == RRD_MEMORY_MODE_SAVE || st->rrd_memory_mode == RRD_MEMORY_MODE_MAP) {
 279         debug(D_RRD_CALLS, "Unmapping stats '%s'.", st->name);
 280         munmap(st, st->memsize);
 281     }
 282     else
 283         freez(st);
 284 }
 285
 286 // ----------------------------------------------------------------------------
 287 // RRDSET - create a chart
 288
 289 RRDSET *rrdset_create(RRDHOST *host, const char *type, const char *id, const char *name, const char *family
 290                       , const char *context, const char *title, const char *units, long priority
 291                       , int update_every, RRDSET_TYPE chart_type) {
 292
 293     if(!type || !type[0]) {
 294         fatal("Cannot create rrd stats without a type.");
 295         return NULL;
 296     }
 297
 298     if(!id || !id[0]) {
 299         fatal("Cannot create rrd stats without an id.");
 300         return NULL;
 301     }
 302
 303     // ------------------------------------------------------------------------
 304     // check if it already exists
 305
 306     char fullid[RRD_ID_LENGTH_MAX + 1];
 307     snprintfz(fullid, RRD_ID_LENGTH_MAX, "%s.%s", type, id);
 308
 309     RRDSET *st = rrdset_find(host, fullid);
 310     if(st) {
 311         debug(D_RRD_CALLS, "RRDSET '%s', already exists.", fullid);
 312         return st;
 313     }
 314
 315     char fullfilename[FILENAME_MAX + 1];
 316
 317     // ------------------------------------------------------------------------
 318     // compose the config_section for this chart
 319
 320     char config_section[RRD_ID_LENGTH_MAX + 1];
 321     if(host == localhost)
 322         strcpy(config_section, fullid);
 323     else
 324         snprintfz(config_section, RRD_ID_LENGTH_MAX, "%s/%s", host->machine_guid, fullid);
 325
 326     // ------------------------------------------------------------------------
 327     // get the options from the config, we need to create it
 328
 329     long rentries = config_get_number(config_section, "history", host->rrd_history_entries);
 330     long entries = align_entries_to_pagesize(host->rrd_memory_mode, rentries);
 331     if(entries != rentries) entries = config_set_number(config_section, "history", entries);
 332
 333     if(host->rrd_memory_mode == RRD_MEMORY_MODE_NONE && entries != rentries)
 334         entries = config_set_number(config_section, "history", 10);
 335
 336     int enabled = config_get_boolean(config_section, "enabled", 1);
 337     if(!enabled) entries = 5;
 338
 339     unsigned long size = sizeof(RRDSET);
 340     char *cache_dir = rrdset_cache_dir(host, fullid, config_section);
 341
 342     time_t now = now_realtime_sec();
 343
 344     // ------------------------------------------------------------------------
 345     // load it or allocate it
 346
 347     debug(D_RRD_CALLS, "Creating RRD_STATS for '%s.%s'.", type, id);
 348
 349     snprintfz(fullfilename, FILENAME_MAX, "%s/main.db", cache_dir);
 350     if(host->rrd_memory_mode == RRD_MEMORY_MODE_SAVE || host->rrd_memory_mode == RRD_MEMORY_MODE_MAP) {
 351         st = (RRDSET *) mymmap(fullfilename, size, ((host->rrd_memory_mode == RRD_MEMORY_MODE_MAP) ? MAP_SHARED : MAP_PRIVATE), 0);
 352         if(st) {
 353             memset(&st->avl, 0, sizeof(avl));
 354             memset(&st->avlname, 0, sizeof(avl));
 355             memset(&st->variables_root_index, 0, sizeof(avl_tree_lock));
 356             memset(&st->dimensions_index, 0, sizeof(avl_tree_lock));
 357             memset(&st->rrdset_rwlock, 0, sizeof(pthread_rwlock_t));
 358
 359             st->name = NULL;
 360             st->type = NULL;
 361             st->family = NULL;
 362             st->context = NULL;
 363             st->title = NULL;
 364             st->units = NULL;
 365             st->dimensions = NULL;
 366             st->next = NULL;
 367             st->variables = NULL;
 368             st->alarms = NULL;
 369             st->flags = 0x00000000;
 370
 371             if(strcmp(st->magic, RRDSET_MAGIC) != 0) {
 372                 errno = 0;
 373                 info("Initializing file %s.", fullfilename);
 374                 memset(st, 0, size);
 375             }
 376             else if(strcmp(st->id, fullid) != 0) {
 377                 errno = 0;
 378                 error("File %s contents are not for chart %s. Clearing it.", fullfilename, fullid);
 379                 // munmap(st, size);
 380                 // st = NULL;
 381                 memset(st, 0, size);
 382             }
 383             else if(st->memsize != size || st->entries != entries) {
 384                 errno = 0;
 385                 error("File %s does not have the desired size. Clearing it.", fullfilename);
 386                 memset(st, 0, size);
 387             }
 388             else if(st->update_every != update_every) {
 389                 errno = 0;
 390                 error("File %s does not have the desired update frequency. Clearing it.", fullfilename);
 391                 memset(st, 0, size);
 392             }
 393             else if((now - st->last_updated.tv_sec) > update_every * entries) {
 394                 errno = 0;
 395                 error("File %s is too old. Clearing it.", fullfilename);
 396                 memset(st, 0, size);
 397             }
 398             else if(st->last_updated.tv_sec > now + update_every) {
 399                 errno = 0;
 400                 error("File %s refers to the future. Clearing it.", fullfilename);
 401                 memset(st, 0, size);
 402             }
 403
 404             // make sure the database is aligned
 405             if(st->last_updated.tv_sec)
 406                 last_updated_time_align(&st->last_updated, update_every);
 407
 408
 409             // make sure we have the right memory mode
 410             // even if we cleared the memory
 411             st->rrd_memory_mode = host->rrd_memory_mode;
 412         }
 413     }
 414
 415     if(unlikely(!st)) {
 416         st = callocz(1, size);
 417         st->rrd_memory_mode = (host->rrd_memory_mode == RRD_MEMORY_MODE_NONE) ? RRD_MEMORY_MODE_NONE : RRD_MEMORY_MODE_RAM;
 418     }
 419
 420     st->config_section = strdup(config_section);
 421     st->rrdhost = host;
 422     st->memsize = size;
 423     st->entries = entries;
 424     st->update_every = update_every;
 425
 426     if(st->current_entry >= st->entries) st->current_entry = 0;
 427
 428     strcpy(st->cache_filename, fullfilename);
 429     strcpy(st->magic, RRDSET_MAGIC);
 430
 431     strcpy(st->id, fullid);
 432     st->hash = simple_hash(st->id);
 433
 434     st->cache_dir = cache_dir;
 435
 436     st->chart_type = rrdset_type_id(config_get(st->config_section, "chart type", rrdset_type_name(chart_type)));
 437     st->type       = config_get(st->config_section, "type", type);
 438     st->family     = config_get(st->config_section, "family", family?family:st->type);
 439     st->units      = config_get(st->config_section, "units", units?units:"");
 440
 441     st->context    = config_get(st->config_section, "context", context?context:st->id);
 442     st->hash_context = simple_hash(st->context);
 443
 444     st->priority = config_get_number(st->config_section, "priority", priority);
 445     if(enabled)
 446         rrdset_flag_set(st, RRDSET_FLAG_ENABLED);
 447     else
 448         rrdset_flag_clear(st, RRDSET_FLAG_ENABLED);
 449
 450     rrdset_flag_clear(st, RRDSET_FLAG_DETAIL);
 451     rrdset_flag_clear(st, RRDSET_FLAG_DEBUG);
 452
 453     // if(!strcmp(st->id, "disk_util.dm-0")) {
 454     //     st->debug = 1;
 455     //     error("enabled debugging for '%s'", st->id);
 456     // }
 457     // else error("not enabled debugging for '%s'", st->id);
 458
 459     st->green = NAN;
 460     st->red = NAN;
 461
 462     st->last_collected_time.tv_sec = 0;
 463     st->last_collected_time.tv_usec = 0;
 464     st->counter_done = 0;
 465
 466     st->gap_when_lost_iterations_above = (int) (
 467             config_get_number(st->config_section, "gap when lost iterations above", RRD_DEFAULT_GAP_INTERPOLATIONS) + 2);
 468
 469     avl_init_lock(&st->dimensions_index, rrddim_compare);
 470     avl_init_lock(&st->variables_root_index, rrdvar_compare);
 471
 472     pthread_rwlock_init(&st->rrdset_rwlock, NULL);
 473     rrdhost_wrlock(host);
 474
 475     if(name && *name) rrdset_set_name(st, name);
 476     else rrdset_set_name(st, id);
 477
 478     {
 479         char varvalue[CONFIG_MAX_VALUE + 1];
 480         char varvalue2[CONFIG_MAX_VALUE + 1];
 481         snprintfz(varvalue, CONFIG_MAX_VALUE, "%s (%s)", title?title:"", st->name);
 482         json_escape_string(varvalue2, varvalue, sizeof(varvalue2));
 483         st->title = config_get(st->config_section, "title", varvalue2);
 484     }
 485
 486     st->rrdfamily = rrdfamily_create(host, st->family);
 487
 488     st->next = host->rrdset_root;
 489     host->rrdset_root = st;
 490
 491     if(host->health_enabled) {
 492         rrdsetvar_create(st, "last_collected_t", RRDVAR_TYPE_TIME_T, &st->last_collected_time.tv_sec, 0);
 493         rrdsetvar_create(st, "collected_total_raw", RRDVAR_TYPE_TOTAL, &st->last_collected_total, 0);
 494         rrdsetvar_create(st, "green", RRDVAR_TYPE_CALCULATED, &st->green, 0);
 495         rrdsetvar_create(st, "red", RRDVAR_TYPE_CALCULATED, &st->red, 0);
 496         rrdsetvar_create(st, "update_every", RRDVAR_TYPE_INT, &st->update_every, 0);
 497     }
 498
 499     if(unlikely(rrdset_index_add(host, st) != st))
 500         error("RRDSET: INTERNAL ERROR: attempt to index duplicate chart '%s'", st->id);
 501
 502     rrdsetcalc_link_matching(st);
 503     rrdcalctemplate_link_matching(st);
 504
 505     rrdhost_unlock(host);
 506
 507     return(st);
 508 }
 509
 510
 511 // ----------------------------------------------------------------------------
 512 // RRDSET - data collection iteration control
 513
 514 inline void rrdset_next_usec_unfiltered(RRDSET *st, usec_t microseconds) {
 515
 516     if(unlikely(!st->last_collected_time.tv_sec)) {
 517         // the first entry
 518         microseconds = st->update_every * USEC_PER_SEC;
 519     }
 520     else if(unlikely(!microseconds)) {
 521         // no dt given by the plugin
 522         struct timeval now;
 523         now_realtime_timeval(&now);
 524         microseconds = dt_usec(&now, &st->last_collected_time);
 525     }
 526
 527     st->usec_since_last_update = microseconds;
 528 }
 529
 530 inline void rrdset_next_usec(RRDSET *st, usec_t microseconds) {
 531     struct timeval now;
 532     now_realtime_timeval(&now);
 533
 534     if(unlikely(!st->last_collected_time.tv_sec)) {
 535         // the first entry
 536         microseconds = st->update_every * USEC_PER_SEC;
 537     }
 538     else if(unlikely(!microseconds)) {
 539         // no dt given by the plugin
 540         microseconds = dt_usec(&now, &st->last_collected_time);
 541     }
 542     else {
 543         // microseconds has the time since the last collection
 544 //#ifdef NETDATA_INTERNAL_CHECKS
 545 //        usec_t now_usec = timeval_usec(&now);
 546 //        usec_t last_usec = timeval_usec(&st->last_collected_time);
 547 //#endif
 548         susec_t since_last_usec = dt_usec_signed(&now, &st->last_collected_time);
 549
 550         if(unlikely(since_last_usec < 0)) {
 551             // oops! the database is in the future
 552             error("Database for chart '%s' on host '%s' is %lld microseconds in the future. Adjusting it to current time.", st->id, st->rrdhost->hostname, -since_last_usec);
 553
 554             st->last_collected_time.tv_sec  = now.tv_sec - st->update_every;
 555             st->last_collected_time.tv_usec = now.tv_usec;
 556             last_collected_time_align(&st->last_collected_time, st->update_every);
 557
 558             st->last_updated.tv_sec  = now.tv_sec - st->update_every;
 559             st->last_updated.tv_usec = now.tv_usec;
 560             last_updated_time_align(&st->last_updated, st->update_every);
 561
 562             microseconds    = st->update_every * USEC_PER_SEC;
 563             since_last_usec = st->update_every * USEC_PER_SEC;
 564         }
 565
 566         // verify the microseconds given is good
 567         if(unlikely(microseconds > (usec_t)since_last_usec)) {
 568             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);
 569
 570 //#ifdef NETDATA_INTERNAL_CHECKS
 571 //            if(unlikely(last_usec + microseconds > now_usec + 1000))
 572 //                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);
 573 //#endif
 574
 575             microseconds = (usec_t)since_last_usec;
 576         }
 577         else if(unlikely(microseconds < (usec_t)since_last_usec * 0.8)) {
 578             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);
 579
 580 //#ifdef NETDATA_INTERNAL_CHECKS
 581 //            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);
 582 //#endif
 583             microseconds = (usec_t)since_last_usec;
 584         }
 585     }
 586     debug(D_RRD_CALLS, "rrdset_next_usec() for chart %s with microseconds %llu", st->name, microseconds);
 587
 588     if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 589         debug(D_RRD_STATS, "%s: NEXT: %llu microseconds", st->name, microseconds);
 590
 591     st->usec_since_last_update = microseconds;
 592 }
 593
 594
 595 // ----------------------------------------------------------------------------
 596 // RRDSET - process the collected values for all dimensions of a chart
 597
 598 static inline void rrdset_init_last_collected_time(RRDSET *st) {
 599     now_realtime_timeval(&st->last_collected_time);
 600     last_collected_time_align(&st->last_collected_time, st->update_every);
 601 }
 602
 603 static inline usec_t rrdset_update_last_collected_time(RRDSET *st) {
 604     usec_t last_collect_ut = st->last_collected_time.tv_sec * USEC_PER_SEC + st->last_collected_time.tv_usec;
 605     usec_t ut = last_collect_ut + st->usec_since_last_update;
 606     st->last_collected_time.tv_sec = (time_t) (ut / USEC_PER_SEC);
 607     st->last_collected_time.tv_usec = (suseconds_t) (ut % USEC_PER_SEC);
 608     return last_collect_ut;
 609 }
 610
 611 static inline void rrdset_init_last_updated_time(RRDSET *st) {
 612     // copy the last collected time to last updated time
 613     st->last_updated.tv_sec  = st->last_collected_time.tv_sec;
 614     st->last_updated.tv_usec = st->last_collected_time.tv_usec;
 615     last_updated_time_align(&st->last_updated, st->update_every);
 616 }
 617
 618 static inline void rrdset_done_push_exclusive(RRDSET *st) {
 619     if(unlikely(!st->last_collected_time.tv_sec)) {
 620         // it is the first entry
 621         // set the last_collected_time to now
 622         rrdset_init_last_collected_time(st);
 623     }
 624     else {
 625         // it is not the first entry
 626         // calculate the proper last_collected_time, using usec_since_last_update
 627         rrdset_update_last_collected_time(st);
 628     }
 629
 630     st->counter_done++;
 631
 632     rrdset_rdlock(st);
 633     rrdset_done_push(st);
 634     rrdset_unlock(st);
 635 }
 636
 637 void rrdset_done(RRDSET *st) {
 638     if(unlikely(netdata_exit)) return;
 639
 640     if(unlikely(st->rrd_memory_mode == RRD_MEMORY_MODE_NONE)) {
 641         if(unlikely(st->rrdhost->rrdpush_enabled))
 642             rrdset_done_push_exclusive(st);
 643
 644         return;
 645     }
 646
 647     debug(D_RRD_CALLS, "rrdset_done() for chart %s", st->name);
 648
 649     RRDDIM *rd;
 650
 651     int
 652             pthreadoldcancelstate;  // store the old cancelable pthread state, to restore it at the end
 653
 654     char
 655             store_this_entry = 1,   // boolean: 1 = store this entry, 0 = don't store this entry
 656             first_entry = 0;        // boolean: 1 = this is the first entry seen for this chart, 0 = all other entries
 657
 658     unsigned int
 659             stored_entries = 0;     // the number of entries we have stored in the db, during this call to rrdset_done()
 660
 661     usec_t
 662             last_collect_ut,        // the timestamp in microseconds, of the last collected value
 663             now_collect_ut,         // the timestamp in microseconds, of this collected value (this is NOW)
 664             last_stored_ut,         // the timestamp in microseconds, of the last stored entry in the db
 665             next_store_ut,          // the timestamp in microseconds, of the next entry to store in the db
 666             update_every_ut = st->update_every * USEC_PER_SEC; // st->update_every in microseconds
 667
 668     if(unlikely(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &pthreadoldcancelstate) != 0))
 669         error("Cannot set pthread cancel state to DISABLE.");
 670
 671     // a read lock is OK here
 672     rrdset_rdlock(st);
 673
 674 /*
 675     // enable the chart, if it was disabled
 676     if(unlikely(rrd_delete_unupdated_dimensions) && !st->enabled)
 677         st->enabled = 1;
 678 */
 679
 680     // check if the chart has a long time to be updated
 681     if(unlikely(st->usec_since_last_update > st->entries * update_every_ut)) {
 682         info("%s: took too long to be updated (%0.3Lf secs). Resetting it.", st->name, (long double)(st->usec_since_last_update / 1000000.0));
 683         rrdset_reset(st);
 684         st->usec_since_last_update = update_every_ut;
 685         first_entry = 1;
 686     }
 687
 688     if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 689         debug(D_RRD_STATS, "%s: microseconds since last update: %llu", st->name, st->usec_since_last_update);
 690
 691     // set last_collected_time
 692     if(unlikely(!st->last_collected_time.tv_sec)) {
 693         // it is the first entry
 694         // set the last_collected_time to now
 695         rrdset_init_last_collected_time(st);
 696
 697         last_collect_ut = st->last_collected_time.tv_sec * USEC_PER_SEC + st->last_collected_time.tv_usec - update_every_ut;
 698
 699         // the first entry should not be stored
 700         store_this_entry = 0;
 701         first_entry = 1;
 702
 703         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 704             debug(D_RRD_STATS, "%s: has not set last_collected_time. Setting it now. Will not store the next entry.", st->name);
 705     }
 706     else {
 707         // it is not the first entry
 708         // calculate the proper last_collected_time, using usec_since_last_update
 709         last_collect_ut = rrdset_update_last_collected_time(st);
 710     }
 711
 712     // if this set has not been updated in the past
 713     // we fake the last_update time to be = now - usec_since_last_update
 714     if(unlikely(!st->last_updated.tv_sec)) {
 715         // it has never been updated before
 716         // set a fake last_updated, in the past using usec_since_last_update
 717         rrdset_init_last_updated_time(st);
 718
 719         // the first entry should not be stored
 720         store_this_entry = 0;
 721         first_entry = 1;
 722
 723         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 724             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);
 725     }
 726
 727     // check if we will re-write the entire data set
 728     if(unlikely(dt_usec(&st->last_collected_time, &st->last_updated) > st->entries * update_every_ut)) {
 729         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);
 730         rrdset_reset(st);
 731         rrdset_init_last_updated_time(st);
 732
 733         st->usec_since_last_update = update_every_ut;
 734
 735         // the first entry should not be stored
 736         store_this_entry = 0;
 737         first_entry = 1;
 738     }
 739
 740     // these are the 3 variables that will help us in interpolation
 741     // last_stored_ut = the last time we added a value to the storage
 742     // now_collect_ut = the time the current value has been collected
 743     // next_store_ut  = the time of the next interpolation point
 744     last_stored_ut = st->last_updated.tv_sec * USEC_PER_SEC + st->last_updated.tv_usec;
 745     now_collect_ut = st->last_collected_time.tv_sec * USEC_PER_SEC + st->last_collected_time.tv_usec;
 746     next_store_ut  = (st->last_updated.tv_sec + st->update_every) * USEC_PER_SEC;
 747
 748     if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG))) {
 749         debug(D_RRD_STATS, "%s: last_collect_ut = %0.3Lf (last collection time)", st->name, (long double)last_collect_ut/1000000.0);
 750         debug(D_RRD_STATS, "%s: now_collect_ut  = %0.3Lf (current collection time)", st->name, (long double)now_collect_ut/1000000.0);
 751         debug(D_RRD_STATS, "%s: last_stored_ut  = %0.3Lf (last updated time)", st->name, (long double)last_stored_ut/1000000.0);
 752         debug(D_RRD_STATS, "%s: next_store_ut   = %0.3Lf (next interpolation point)", st->name, (long double)next_store_ut/1000000.0);
 753     }
 754
 755     if(unlikely(!st->counter_done)) {
 756         store_this_entry = 0;
 757         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 758             debug(D_RRD_STATS, "%s: Will not store the next entry.", st->name);
 759     }
 760     st->counter_done++;
 761
 762     if(unlikely(st->rrdhost->rrdpush_enabled))
 763         rrdset_done_push(st);
 764
 765     // calculate totals and count the dimensions
 766     int dimensions = 0;
 767     st->collected_total = 0;
 768     rrddim_foreach_read(rd, st) {
 769         dimensions++;
 770         if(likely(rd->updated))
 771             st->collected_total += rd->collected_value;
 772     }
 773
 774     uint32_t storage_flags = SN_EXISTS;
 775
 776     // process all dimensions to calculate their values
 777     // based on the collected figures only
 778     // at this stage we do not interpolate anything
 779     rrddim_foreach_read(rd, st) {
 780
 781         if(unlikely(!rd->updated)) {
 782             rd->calculated_value = 0;
 783             continue;
 784         }
 785
 786         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 787             debug(D_RRD_STATS, "%s/%s: START "
 788                     " last_collected_value = " COLLECTED_NUMBER_FORMAT
 789                     " collected_value = " COLLECTED_NUMBER_FORMAT
 790                     " last_calculated_value = " CALCULATED_NUMBER_FORMAT
 791                     " calculated_value = " CALCULATED_NUMBER_FORMAT
 792                                       , st->id, rd->name
 793                                       , rd->last_collected_value
 794                                       , rd->collected_value
 795                                       , rd->last_calculated_value
 796                                       , rd->calculated_value
 797             );
 798
 799         switch(rd->algorithm) {
 800             case RRD_ALGORITHM_ABSOLUTE:
 801                 rd->calculated_value = (calculated_number)rd->collected_value
 802                                        * (calculated_number)rd->multiplier
 803                                        / (calculated_number)rd->divisor;
 804
 805                 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 806                     debug(D_RRD_STATS, "%s/%s: CALC ABS/ABS-NO-IN "
 807                             CALCULATED_NUMBER_FORMAT " = "
 808                             COLLECTED_NUMBER_FORMAT
 809                             " * " CALCULATED_NUMBER_FORMAT
 810                             " / " CALCULATED_NUMBER_FORMAT
 811                           , st->id, rd->name
 812                           , rd->calculated_value
 813                           , rd->collected_value
 814                           , (calculated_number)rd->multiplier
 815                           , (calculated_number)rd->divisor
 816                     );
 817                 break;
 818
 819             case RRD_ALGORITHM_PCENT_OVER_ROW_TOTAL:
 820                 if(unlikely(!st->collected_total))
 821                     rd->calculated_value = 0;
 822                 else
 823                     // the percentage of the current value
 824                     // over the total of all dimensions
 825                     rd->calculated_value =
 826                             (calculated_number)100
 827                             * (calculated_number)rd->collected_value
 828                             / (calculated_number)st->collected_total;
 829
 830                 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 831                     debug(D_RRD_STATS, "%s/%s: CALC PCENT-ROW "
 832                             CALCULATED_NUMBER_FORMAT " = 100"
 833                                     " * " COLLECTED_NUMBER_FORMAT
 834                             " / " COLLECTED_NUMBER_FORMAT
 835                           , st->id, rd->name
 836                           , rd->calculated_value
 837                           , rd->collected_value
 838                           , st->collected_total
 839                     );
 840                 break;
 841
 842             case RRD_ALGORITHM_INCREMENTAL:
 843                 if(unlikely(rd->collections_counter <= 1)) {
 844                     rd->calculated_value = 0;
 845                     continue;
 846                 }
 847
 848                 // if the new is smaller than the old (an overflow, or reset), set the old equal to the new
 849                 // to reset the calculation (it will give zero as the calculation for this second)
 850                 if(unlikely(rd->last_collected_value > rd->collected_value)) {
 851                     debug(D_RRD_STATS, "%s.%s: RESET or OVERFLOW. Last collected value = " COLLECTED_NUMBER_FORMAT ", current = " COLLECTED_NUMBER_FORMAT
 852                           , st->name, rd->name
 853                           , rd->last_collected_value
 854                           , rd->collected_value);
 855
 856                     if(!(rrddim_flag_check(rd, RRDDIM_FLAG_DONT_DETECT_RESETS_OR_OVERFLOWS)))
 857                         storage_flags = SN_EXISTS_RESET;
 858
 859                     rd->last_collected_value = rd->collected_value;
 860                 }
 861
 862                 rd->calculated_value +=
 863                         (calculated_number)(rd->collected_value - rd->last_collected_value)
 864                         * (calculated_number)rd->multiplier
 865                         / (calculated_number)rd->divisor;
 866
 867                 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 868                     debug(D_RRD_STATS, "%s/%s: CALC INC PRE "
 869                             CALCULATED_NUMBER_FORMAT " = ("
 870                             COLLECTED_NUMBER_FORMAT " - " COLLECTED_NUMBER_FORMAT
 871                             ")"
 872                                     " * " CALCULATED_NUMBER_FORMAT
 873                             " / " CALCULATED_NUMBER_FORMAT
 874                           , st->id, rd->name
 875                           , rd->calculated_value
 876                           , rd->collected_value, rd->last_collected_value
 877                           , (calculated_number)rd->multiplier
 878                           , (calculated_number)rd->divisor
 879                     );
 880                 break;
 881
 882             case RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL:
 883                 if(unlikely(rd->collections_counter <= 1)) {
 884                     rd->calculated_value = 0;
 885                     continue;
 886                 }
 887
 888                 // if the new is smaller than the old (an overflow, or reset), set the old equal to the new
 889                 // to reset the calculation (it will give zero as the calculation for this second)
 890                 if(unlikely(rd->last_collected_value > rd->collected_value)) {
 891                     debug(D_RRD_STATS, "%s.%s: RESET or OVERFLOW. Last collected value = " COLLECTED_NUMBER_FORMAT ", current = " COLLECTED_NUMBER_FORMAT
 892                           , st->name, rd->name
 893                           , rd->last_collected_value
 894                           , rd->collected_value);
 895
 896                     if(!(rrddim_flag_check(rd, RRDDIM_FLAG_DONT_DETECT_RESETS_OR_OVERFLOWS)))
 897                         storage_flags = SN_EXISTS_RESET;
 898
 899                     rd->last_collected_value = rd->collected_value;
 900                 }
 901
 902                 // the percentage of the current increment
 903                 // over the increment of all dimensions together
 904                 if(unlikely(st->collected_total == st->last_collected_total))
 905                     rd->calculated_value = 0;
 906                 else
 907                     rd->calculated_value =
 908                             (calculated_number)100
 909                             * (calculated_number)(rd->collected_value - rd->last_collected_value)
 910                             / (calculated_number)(st->collected_total - st->last_collected_total);
 911
 912                 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 913                     debug(D_RRD_STATS, "%s/%s: CALC PCENT-DIFF "
 914                             CALCULATED_NUMBER_FORMAT " = 100"
 915                                     " * (" COLLECTED_NUMBER_FORMAT " - " COLLECTED_NUMBER_FORMAT ")"
 916                                     " / (" COLLECTED_NUMBER_FORMAT " - " COLLECTED_NUMBER_FORMAT ")"
 917                           , st->id, rd->name
 918                           , rd->calculated_value
 919                           , rd->collected_value, rd->last_collected_value
 920                           , st->collected_total, st->last_collected_total
 921                     );
 922                 break;
 923
 924             default:
 925                 // make the default zero, to make sure
 926                 // it gets noticed when we add new types
 927                 rd->calculated_value = 0;
 928
 929                 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 930                     debug(D_RRD_STATS, "%s/%s: CALC "
 931                             CALCULATED_NUMBER_FORMAT " = 0"
 932                           , st->id, rd->name
 933                           , rd->calculated_value
 934                     );
 935                 break;
 936         }
 937
 938         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 939             debug(D_RRD_STATS, "%s/%s: PHASE2 "
 940                     " last_collected_value = " COLLECTED_NUMBER_FORMAT
 941                     " collected_value = " COLLECTED_NUMBER_FORMAT
 942                     " last_calculated_value = " CALCULATED_NUMBER_FORMAT
 943                     " calculated_value = " CALCULATED_NUMBER_FORMAT
 944                                       , st->id, rd->name
 945                                       , rd->last_collected_value
 946                                       , rd->collected_value
 947                                       , rd->last_calculated_value
 948                                       , rd->calculated_value
 949             );
 950
 951     }
 952
 953     // at this point we have all the calculated values ready
 954     // it is now time to interpolate values on a second boundary
 955
 956     if(unlikely(now_collect_ut < next_store_ut)) {
 957         // this is collected in the same interpolation point
 958
 959         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 960             debug(D_RRD_STATS, "%s: THIS IS IN THE SAME INTERPOLATION POINT", st->name);
 961
 962 //#ifdef NETDATA_INTERNAL_CHECKS
 963 //        info("%s is collected in the same interpolation point: short by %llu microseconds", st->name, next_store_ut - now_collect_ut);
 964 //#endif
 965     }
 966
 967     usec_t first_ut = last_stored_ut;
 968     long long iterations = (now_collect_ut - last_stored_ut) / (update_every_ut);
 969     if((now_collect_ut % (update_every_ut)) == 0) iterations++;
 970
 971     for( ; next_store_ut <= now_collect_ut ; last_collect_ut = next_store_ut, next_store_ut += update_every_ut, iterations-- ) {
 972 //#ifdef NETDATA_INTERNAL_CHECKS
 973 //        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); }
 974 //#endif
 975
 976         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG))) {
 977             debug(D_RRD_STATS, "%s: last_stored_ut = %0.3Lf (last updated time)", st->name, (long double)last_stored_ut/1000000.0);
 978             debug(D_RRD_STATS, "%s: next_store_ut  = %0.3Lf (next interpolation point)", st->name, (long double)next_store_ut/1000000.0);
 979         }
 980
 981         st->last_updated.tv_sec = (time_t) (next_store_ut / USEC_PER_SEC);
 982         st->last_updated.tv_usec = 0;
 983
 984         rrddim_foreach_read(rd, st) {
 985             calculated_number new_value;
 986
 987             switch(rd->algorithm) {
 988                 case RRD_ALGORITHM_INCREMENTAL:
 989                     new_value = (calculated_number)
 990                             (      rd->calculated_value
 991                                    * (calculated_number)(next_store_ut - last_collect_ut)
 992                                    / (calculated_number)(now_collect_ut - last_collect_ut)
 993                             );
 994
 995                     if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 996                         debug(D_RRD_STATS, "%s/%s: CALC2 INC "
 997                                 CALCULATED_NUMBER_FORMAT " = "
 998                                 CALCULATED_NUMBER_FORMAT
 999                                 " * %llu"
1000                                         " / %llu"
1001                               , st->id, rd->name
1002                               , new_value
1003                               , rd->calculated_value
1004                               , (next_store_ut - last_stored_ut)
1005                               , (now_collect_ut - last_stored_ut)
1006                         );
1007
1008                     rd->calculated_value -= new_value;
1009                     new_value += rd->last_calculated_value;
1010                     rd->last_calculated_value = 0;
1011                     new_value /= (calculated_number)st->update_every;
1012
1013                     if(unlikely(next_store_ut - last_stored_ut < update_every_ut)) {
1014                         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1015                             debug(D_RRD_STATS, "%s/%s: COLLECTION POINT IS SHORT " CALCULATED_NUMBER_FORMAT " - EXTRAPOLATING",
1016                                     st->id, rd->name
1017                                   , (calculated_number)(next_store_ut - last_stored_ut)
1018                             );
1019                         new_value = new_value * (calculated_number)(st->update_every * 1000000) / (calculated_number)(next_store_ut - last_stored_ut);
1020                     }
1021                     break;
1022
1023                 case RRD_ALGORITHM_ABSOLUTE:
1024                 case RRD_ALGORITHM_PCENT_OVER_ROW_TOTAL:
1025                 case RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL:
1026                 default:
1027                     if(iterations == 1) {
1028                         // this is the last iteration
1029                         // do not interpolate
1030                         // just show the calculated value
1031
1032                         new_value = rd->calculated_value;
1033                     }
1034                     else {
1035                         // we have missed an update
1036                         // interpolate in the middle values
1037
1038                         new_value = (calculated_number)
1039                                 (   (     (rd->calculated_value - rd->last_calculated_value)
1040                                           * (calculated_number)(next_store_ut - last_collect_ut)
1041                                           / (calculated_number)(now_collect_ut - last_collect_ut)
1042                                     )
1043                                     +  rd->last_calculated_value
1044                                 );
1045
1046                         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1047                             debug(D_RRD_STATS, "%s/%s: CALC2 DEF "
1048                                     CALCULATED_NUMBER_FORMAT " = ((("
1049                                             "(" CALCULATED_NUMBER_FORMAT " - " CALCULATED_NUMBER_FORMAT ")"
1050                                             " * %llu"
1051                                             " / %llu) + " CALCULATED_NUMBER_FORMAT
1052                                   , st->id, rd->name
1053                                   , new_value
1054                                   , rd->calculated_value, rd->last_calculated_value
1055                                   , (next_store_ut - first_ut)
1056                                   , (now_collect_ut - first_ut), rd->last_calculated_value
1057                             );
1058                     }
1059                     break;
1060             }
1061
1062             if(unlikely(!store_this_entry)) {
1063                 rd->values[st->current_entry] = pack_storage_number(0, SN_NOT_EXISTS);
1064                 continue;
1065             }
1066
1067             if(likely(rd->updated && rd->collections_counter > 1 && iterations < st->gap_when_lost_iterations_above)) {
1068                 rd->values[st->current_entry] = pack_storage_number(new_value, storage_flags );
1069                 rd->last_stored_value = new_value;
1070
1071                 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1072                     debug(D_RRD_STATS, "%s/%s: STORE[%ld] "
1073                             CALCULATED_NUMBER_FORMAT " = " CALCULATED_NUMBER_FORMAT
1074                           , st->id, rd->name
1075                           , st->current_entry
1076                           , unpack_storage_number(rd->values[st->current_entry]), new_value
1077                     );
1078             }
1079             else {
1080                 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1081                     debug(D_RRD_STATS, "%s/%s: STORE[%ld] = NON EXISTING "
1082                           , st->id, rd->name
1083                           , st->current_entry
1084                     );
1085                 rd->values[st->current_entry] = pack_storage_number(0, SN_NOT_EXISTS);
1086                 rd->last_stored_value = NAN;
1087             }
1088
1089             stored_entries++;
1090
1091             if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG))) {
1092                 calculated_number t1 = new_value * (calculated_number)rd->multiplier / (calculated_number)rd->divisor;
1093                 calculated_number t2 = unpack_storage_number(rd->values[st->current_entry]);
1094                 calculated_number accuracy = accuracy_loss(t1, t2);
1095                 debug(D_RRD_STATS, "%s/%s: UNPACK[%ld] = " CALCULATED_NUMBER_FORMAT " FLAGS=0x%08x (original = " CALCULATED_NUMBER_FORMAT ", accuracy loss = " CALCULATED_NUMBER_FORMAT "%%%s)"
1096                       , st->id, rd->name
1097                       , st->current_entry
1098                       , t2
1099                       , get_storage_number_flags(rd->values[st->current_entry])
1100                       , t1
1101                       , accuracy
1102                       , (accuracy > ACCURACY_LOSS) ? " **TOO BIG** " : ""
1103                 );
1104
1105                 rd->collected_volume += t1;
1106                 rd->stored_volume += t2;
1107                 accuracy = accuracy_loss(rd->collected_volume, rd->stored_volume);
1108                 debug(D_RRD_STATS, "%s/%s: VOLUME[%ld] = " CALCULATED_NUMBER_FORMAT ", calculated  = " CALCULATED_NUMBER_FORMAT ", accuracy loss = " CALCULATED_NUMBER_FORMAT "%%%s"
1109                       , st->id, rd->name
1110                       , st->current_entry
1111                       , rd->stored_volume
1112                       , rd->collected_volume
1113                       , accuracy
1114                       , (accuracy > ACCURACY_LOSS) ? " **TOO BIG** " : ""
1115                 );
1116
1117             }
1118         }
1119         // reset the storage flags for the next point, if any;
1120         storage_flags = SN_EXISTS;
1121
1122         st->counter++;
1123         st->current_entry = ((st->current_entry + 1) >= st->entries) ? 0 : st->current_entry + 1;
1124         last_stored_ut = next_store_ut;
1125     }
1126
1127     st->last_collected_total  = st->collected_total;
1128
1129     rrddim_foreach_read(rd, st) {
1130         if(unlikely(!rd->updated))
1131             continue;
1132
1133         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1134             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);
1135
1136         rd->last_collected_value = rd->collected_value;
1137
1138         switch(rd->algorithm) {
1139             case RRD_ALGORITHM_INCREMENTAL:
1140                 if(unlikely(!first_entry)) {
1141                     if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1142                         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);
1143                     rd->last_calculated_value += rd->calculated_value;
1144                 }
1145                 else {
1146                     if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1147                         debug(D_RRD_STATS, "%s: THIS IS THE FIRST POINT", st->name);
1148                 }
1149                 break;
1150
1151             case RRD_ALGORITHM_ABSOLUTE:
1152             case RRD_ALGORITHM_PCENT_OVER_ROW_TOTAL:
1153             case RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL:
1154                 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1155                     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);
1156                 rd->last_calculated_value = rd->calculated_value;
1157                 break;
1158         }
1159
1160         rd->calculated_value = 0;
1161         rd->collected_value = 0;
1162         rd->updated = 0;
1163
1164         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1165             debug(D_RRD_STATS, "%s/%s: END "
1166                     " last_collected_value = " COLLECTED_NUMBER_FORMAT
1167                     " collected_value = " COLLECTED_NUMBER_FORMAT
1168                     " last_calculated_value = " CALCULATED_NUMBER_FORMAT
1169                     " calculated_value = " CALCULATED_NUMBER_FORMAT
1170                                       , st->id, rd->name
1171                                       , rd->last_collected_value
1172                                       , rd->collected_value
1173                                       , rd->last_calculated_value
1174                                       , rd->calculated_value
1175             );
1176     }
1177
1178     // ALL DONE ABOUT THE DATA UPDATE
1179     // --------------------------------------------------------------------
1180
1181 /*
1182     // find if there are any obsolete dimensions (not updated recently)
1183     if(unlikely(rrd_delete_unupdated_dimensions)) {
1184
1185         for( rd = st->dimensions; likely(rd) ; rd = rd->next )
1186             if((rd->last_collected_time.tv_sec + (rrd_delete_unupdated_dimensions * st->update_every)) < st->last_collected_time.tv_sec)
1187                 break;
1188
1189         if(unlikely(rd)) {
1190             RRDDIM *last;
1191             // there is dimension to free
1192             // upgrade our read lock to a write lock
1193             pthread_rwlock_unlock(&st->rrdset_rwlock);
1194             pthread_rwlock_wrlock(&st->rrdset_rwlock);
1195
1196             for( rd = st->dimensions, last = NULL ; likely(rd) ; ) {
1197                 // remove it only it is not updated in rrd_delete_unupdated_dimensions seconds
1198
1199                 if(unlikely((rd->last_collected_time.tv_sec + (rrd_delete_unupdated_dimensions * st->update_every)) < st->last_collected_time.tv_sec)) {
1200                     info("Removing obsolete dimension '%s' (%s) of '%s' (%s).", rd->name, rd->id, st->name, st->id);
1201
1202                     if(unlikely(!last)) {
1203                         st->dimensions = rd->next;
1204                         rd->next = NULL;
1205                         rrddim_free(st, rd);
1206                         rd = st->dimensions;
1207                         continue;
1208                     }
1209                     else {
1210                         last->next = rd->next;
1211                         rd->next = NULL;
1212                         rrddim_free(st, rd);
1213                         rd = last->next;
1214                         continue;
1215                     }
1216                 }
1217
1218                 last = rd;
1219                 rd = rd->next;
1220             }
1221
1222             if(unlikely(!st->dimensions)) {
1223                 info("Disabling chart %s (%s) since it does not have any dimensions", st->name, st->id);
1224                 st->enabled = 0;
1225             }
1226         }
1227     }
1228 */
1229
1230     rrdset_unlock(st);
1231
1232     if(unlikely(pthread_setcancelstate(pthreadoldcancelstate, NULL) != 0))
1233         error("Cannot set pthread cancel state to RESTORE (%d).", pthreadoldcancelstate);
1234 }