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