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(long entries) {
 199     if(rrdpush_exclusive)
 200         return entries;
 201
 202     if(entries < 5) entries = 5;
 203     if(entries > RRD_HISTORY_ENTRIES_MAX) entries = RRD_HISTORY_ENTRIES_MAX;
 204
 205     long page = (size_t)sysconf(_SC_PAGESIZE);
 206     long size = sizeof(RRDDIM) + entries * sizeof(storage_number);
 207     if(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(rentries);
 326     if(entries != rentries) entries = config_set_number(config_section, "history", entries);
 327
 328     int enabled = config_get_boolean(config_section, "enabled", 1);
 329     if(!enabled) entries = 5;
 330
 331     unsigned long size = sizeof(RRDSET);
 332     char *cache_dir = rrdset_cache_dir(host, fullid, config_section);
 333
 334     time_t now = now_realtime_sec();
 335
 336     // ------------------------------------------------------------------------
 337     // load it or allocate it
 338
 339     debug(D_RRD_CALLS, "Creating RRD_STATS for '%s.%s'.", type, id);
 340
 341     snprintfz(fullfilename, FILENAME_MAX, "%s/main.db", cache_dir);
 342     if(host->rrd_memory_mode != RRD_MEMORY_MODE_RAM) {
 343         st = (RRDSET *) mymmap(fullfilename, size, ((host->rrd_memory_mode == RRD_MEMORY_MODE_MAP) ? MAP_SHARED : MAP_PRIVATE), 0);
 344         if(st) {
 345             memset(&st->avl, 0, sizeof(avl));
 346             memset(&st->avlname, 0, sizeof(avl));
 347             memset(&st->variables_root_index, 0, sizeof(avl_tree_lock));
 348             memset(&st->dimensions_index, 0, sizeof(avl_tree_lock));
 349             memset(&st->rrdset_rwlock, 0, sizeof(pthread_rwlock_t));
 350
 351             st->name = NULL;
 352             st->type = NULL;
 353             st->family = NULL;
 354             st->context = NULL;
 355             st->title = NULL;
 356             st->units = NULL;
 357             st->dimensions = NULL;
 358             st->next = NULL;
 359             st->variables = NULL;
 360             st->alarms = NULL;
 361             st->flags = 0x00000000;
 362
 363             if(strcmp(st->magic, RRDSET_MAGIC) != 0) {
 364                 errno = 0;
 365                 info("Initializing file %s.", fullfilename);
 366                 memset(st, 0, size);
 367             }
 368             else if(strcmp(st->id, fullid) != 0) {
 369                 errno = 0;
 370                 error("File %s contents are not for chart %s. Clearing it.", fullfilename, fullid);
 371                 // munmap(st, size);
 372                 // st = NULL;
 373                 memset(st, 0, size);
 374             }
 375             else if(st->memsize != size || st->entries != entries) {
 376                 errno = 0;
 377                 error("File %s does not have the desired size. Clearing it.", fullfilename);
 378                 memset(st, 0, size);
 379             }
 380             else if(st->update_every != update_every) {
 381                 errno = 0;
 382                 error("File %s does not have the desired update frequency. Clearing it.", fullfilename);
 383                 memset(st, 0, size);
 384             }
 385             else if((now - st->last_updated.tv_sec) > update_every * entries) {
 386                 errno = 0;
 387                 error("File %s is too old. Clearing it.", fullfilename);
 388                 memset(st, 0, size);
 389             }
 390             else if(st->last_updated.tv_sec > now + update_every) {
 391                 errno = 0;
 392                 error("File %s refers to the future. Clearing it.", fullfilename);
 393                 memset(st, 0, size);
 394             }
 395
 396             // make sure the database is aligned
 397             if(st->last_updated.tv_sec)
 398                 timeval_align(&st->last_updated, update_every);
 399
 400             // make sure we have the right memory mode
 401             // even if we cleared the memory
 402             st->rrd_memory_mode = host->rrd_memory_mode;
 403         }
 404     }
 405
 406     if(unlikely(!st)) {
 407         st = callocz(1, size);
 408         st->rrd_memory_mode = RRD_MEMORY_MODE_RAM;
 409     }
 410
 411     st->config_section = strdup(config_section);
 412     st->rrdhost = host;
 413     st->memsize = size;
 414     st->entries = entries;
 415     st->update_every = update_every;
 416
 417     if(st->current_entry >= st->entries) st->current_entry = 0;
 418
 419     strcpy(st->cache_filename, fullfilename);
 420     strcpy(st->magic, RRDSET_MAGIC);
 421
 422     strcpy(st->id, fullid);
 423     st->hash = simple_hash(st->id);
 424
 425     st->cache_dir = cache_dir;
 426
 427     st->chart_type = rrdset_type_id(config_get(st->config_section, "chart type", rrdset_type_name(chart_type)));
 428     st->type       = config_get(st->config_section, "type", type);
 429     st->family     = config_get(st->config_section, "family", family?family:st->type);
 430     st->units      = config_get(st->config_section, "units", units?units:"");
 431
 432     st->context    = config_get(st->config_section, "context", context?context:st->id);
 433     st->hash_context = simple_hash(st->context);
 434
 435     st->priority = config_get_number(st->config_section, "priority", priority);
 436     if(enabled)
 437         rrdset_flag_set(st, RRDSET_FLAG_ENABLED);
 438     else
 439         rrdset_flag_clear(st, RRDSET_FLAG_ENABLED);
 440
 441     rrdset_flag_clear(st, RRDSET_FLAG_DETAIL);
 442     rrdset_flag_clear(st, RRDSET_FLAG_DEBUG);
 443
 444     // if(!strcmp(st->id, "disk_util.dm-0")) {
 445     //     st->debug = 1;
 446     //     error("enabled debugging for '%s'", st->id);
 447     // }
 448     // else error("not enabled debugging for '%s'", st->id);
 449
 450     st->green = NAN;
 451     st->red = NAN;
 452
 453     st->last_collected_time.tv_sec = 0;
 454     st->last_collected_time.tv_usec = 0;
 455     st->counter_done = 0;
 456
 457     st->gap_when_lost_iterations_above = (int) (
 458             config_get_number(st->config_section, "gap when lost iterations above", RRD_DEFAULT_GAP_INTERPOLATIONS) + 2);
 459
 460     avl_init_lock(&st->dimensions_index, rrddim_compare);
 461     avl_init_lock(&st->variables_root_index, rrdvar_compare);
 462
 463     pthread_rwlock_init(&st->rrdset_rwlock, NULL);
 464     rrdhost_wrlock(host);
 465
 466     if(name && *name) rrdset_set_name(st, name);
 467     else rrdset_set_name(st, id);
 468
 469     {
 470         char varvalue[CONFIG_MAX_VALUE + 1];
 471         char varvalue2[CONFIG_MAX_VALUE + 1];
 472         snprintfz(varvalue, CONFIG_MAX_VALUE, "%s (%s)", title?title:"", st->name);
 473         json_escape_string(varvalue2, varvalue, sizeof(varvalue2));
 474         st->title = config_get(st->config_section, "title", varvalue2);
 475     }
 476
 477     st->rrdfamily = rrdfamily_create(host, st->family);
 478
 479     st->next = host->rrdset_root;
 480     host->rrdset_root = st;
 481
 482     if(host->health_enabled) {
 483         rrdsetvar_create(st, "last_collected_t", RRDVAR_TYPE_TIME_T, &st->last_collected_time.tv_sec, 0);
 484         rrdsetvar_create(st, "collected_total_raw", RRDVAR_TYPE_TOTAL, &st->last_collected_total, 0);
 485         rrdsetvar_create(st, "green", RRDVAR_TYPE_CALCULATED, &st->green, 0);
 486         rrdsetvar_create(st, "red", RRDVAR_TYPE_CALCULATED, &st->red, 0);
 487         rrdsetvar_create(st, "update_every", RRDVAR_TYPE_INT, &st->update_every, 0);
 488     }
 489
 490     if(unlikely(rrdset_index_add(host, st) != st))
 491         error("RRDSET: INTERNAL ERROR: attempt to index duplicate chart '%s'", st->id);
 492
 493     rrdsetcalc_link_matching(st);
 494     rrdcalctemplate_link_matching(st);
 495
 496     rrdhost_unlock(host);
 497
 498     return(st);
 499 }
 500
 501
 502 // ----------------------------------------------------------------------------
 503 // RRDSET - data collection iteration control
 504
 505 inline void rrdset_next_usec_unfiltered(RRDSET *st, usec_t microseconds) {
 506
 507     if(unlikely(!st->last_collected_time.tv_sec)) {
 508         // the first entry
 509         microseconds = st->update_every * USEC_PER_SEC;
 510     }
 511     else if(unlikely(!microseconds)) {
 512         // no dt given by the plugin
 513         struct timeval now;
 514         now_realtime_timeval(&now);
 515         microseconds = dt_usec(&now, &st->last_collected_time);
 516     }
 517
 518     st->usec_since_last_update = microseconds;
 519 }
 520
 521 inline void rrdset_next_usec(RRDSET *st, usec_t microseconds) {
 522     struct timeval now;
 523     now_realtime_timeval(&now);
 524
 525     if(unlikely(!st->last_collected_time.tv_sec)) {
 526         // the first entry
 527         microseconds = st->update_every * USEC_PER_SEC;
 528     }
 529     else if(unlikely(!microseconds)) {
 530         // no dt given by the plugin
 531         microseconds = dt_usec(&now, &st->last_collected_time);
 532     }
 533     else {
 534         // microseconds has the time since the last collection
 535 //#ifdef NETDATA_INTERNAL_CHECKS
 536 //        usec_t now_usec = timeval_usec(&now);
 537 //        usec_t last_usec = timeval_usec(&st->last_collected_time);
 538 //#endif
 539         susec_t since_last_usec = dt_usec_signed(&now, &st->last_collected_time);
 540
 541         if(unlikely(since_last_usec < 0)) {
 542             // oops! the database is in the future
 543             error("Database for chart '%s' on host '%s' is %lld microseconds in the future.", st->id, st->rrdhost->hostname, -since_last_usec);
 544             memcpy(&st->last_collected_time, &now, sizeof(struct timeval));
 545             st->last_collected_time.tv_sec -= st->update_every;
 546
 547             memcpy(&st->last_updated, &now, sizeof(struct timeval));
 548             timeval_align(&st->last_updated, st->update_every);
 549             st->last_updated.tv_sec -= st->update_every;
 550
 551             microseconds = st->update_every * USEC_PER_SEC;
 552             since_last_usec = st->update_every * USEC_PER_SEC;
 553         }
 554
 555         // verify the microseconds given is good
 556         if(unlikely(microseconds > (usec_t)since_last_usec)) {
 557             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);
 558
 559 //#ifdef NETDATA_INTERNAL_CHECKS
 560 //            if(unlikely(last_usec + microseconds > now_usec + 1000))
 561 //                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);
 562 //#endif
 563
 564             microseconds = (usec_t)since_last_usec;
 565         }
 566         else if(unlikely(microseconds < (usec_t)since_last_usec * 0.8)) {
 567             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);
 568
 569 //#ifdef NETDATA_INTERNAL_CHECKS
 570 //            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);
 571 //#endif
 572             microseconds = (usec_t)since_last_usec;
 573         }
 574     }
 575     debug(D_RRD_CALLS, "rrdset_next_usec() for chart %s with microseconds %llu", st->name, microseconds);
 576
 577     if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 578         debug(D_RRD_STATS, "%s: NEXT: %llu microseconds", st->name, microseconds);
 579
 580     st->usec_since_last_update = microseconds;
 581 }
 582
 583
 584 // ----------------------------------------------------------------------------
 585 // RRDSET - process the collected values for all dimensions of a chart
 586
 587 static inline void rrdset_init_last_collected_time(RRDSET *st) {
 588     now_realtime_timeval(&st->last_collected_time);
 589     timeval_align(&st->last_collected_time, st->update_every);
 590 }
 591
 592 static inline usec_t rrdset_update_last_collected_time(RRDSET *st) {
 593     usec_t last_collect_ut = st->last_collected_time.tv_sec * USEC_PER_SEC + st->last_collected_time.tv_usec;
 594     usec_t ut = last_collect_ut + st->usec_since_last_update;
 595     st->last_collected_time.tv_sec = (time_t) (ut / USEC_PER_SEC);
 596     st->last_collected_time.tv_usec = (suseconds_t) (ut % USEC_PER_SEC);
 597     return last_collect_ut;
 598 }
 599
 600 static inline void rrdset_init_last_updated_time(RRDSET *st) {
 601     // copy the last collected time to last updated time
 602     memcpy(&st->last_updated, &st->last_collected_time, sizeof(struct timeval));
 603     timeval_align(&st->last_updated, st->update_every);
 604     st->last_updated.tv_usec = 0;
 605 }
 606
 607 static inline void rrdset_done_push_int(RRDSET *st) {
 608     if(unlikely(!st->last_collected_time.tv_sec)) {
 609         // it is the first entry
 610         // set the last_collected_time to now
 611         rrdset_init_last_collected_time(st);
 612     }
 613     else {
 614         // it is not the first entry
 615         // calculate the proper last_collected_time, using usec_since_last_update
 616         rrdset_update_last_collected_time(st);
 617     }
 618
 619     st->counter++;
 620     st->counter_done++;
 621
 622     rrdset_done_push(st);
 623 }
 624
 625 void rrdset_done(RRDSET *st) {
 626     if(unlikely(netdata_exit)) return;
 627
 628     if(unlikely(rrdpush_exclusive)) {
 629         rrdset_done_push_int(st);
 630         return;
 631     }
 632
 633     debug(D_RRD_CALLS, "rrdset_done() for chart %s", st->name);
 634
 635     RRDDIM *rd;
 636
 637     int
 638             pthreadoldcancelstate;  // store the old cancelable pthread state, to restore it at the end
 639
 640     char
 641             store_this_entry = 1,   // boolean: 1 = store this entry, 0 = don't store this entry
 642             first_entry = 0;        // boolean: 1 = this is the first entry seen for this chart, 0 = all other entries
 643
 644     unsigned int
 645             stored_entries = 0;     // the number of entries we have stored in the db, during this call to rrdset_done()
 646
 647     usec_t
 648             last_collect_ut,        // the timestamp in microseconds, of the last collected value
 649             now_collect_ut,         // the timestamp in microseconds, of this collected value (this is NOW)
 650             last_stored_ut,         // the timestamp in microseconds, of the last stored entry in the db
 651             next_store_ut,          // the timestamp in microseconds, of the next entry to store in the db
 652             update_every_ut = st->update_every * USEC_PER_SEC; // st->update_every in microseconds
 653
 654     if(unlikely(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &pthreadoldcancelstate) != 0))
 655         error("Cannot set pthread cancel state to DISABLE.");
 656
 657     // a read lock is OK here
 658     rrdset_rdlock(st);
 659
 660 /*
 661     // enable the chart, if it was disabled
 662     if(unlikely(rrd_delete_unupdated_dimensions) && !st->enabled)
 663         st->enabled = 1;
 664 */
 665
 666     // check if the chart has a long time to be updated
 667     if(unlikely(st->usec_since_last_update > st->entries * update_every_ut)) {
 668         info("%s: took too long to be updated (%0.3Lf secs). Resetting it.", st->name, (long double)(st->usec_since_last_update / 1000000.0));
 669         rrdset_reset(st);
 670         st->usec_since_last_update = update_every_ut;
 671         first_entry = 1;
 672     }
 673
 674     if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 675         debug(D_RRD_STATS, "%s: microseconds since last update: %llu", st->name, st->usec_since_last_update);
 676
 677     // set last_collected_time
 678     if(unlikely(!st->last_collected_time.tv_sec)) {
 679         // it is the first entry
 680         // set the last_collected_time to now
 681         rrdset_init_last_collected_time(st);
 682
 683         last_collect_ut = st->last_collected_time.tv_sec * USEC_PER_SEC + st->last_collected_time.tv_usec - update_every_ut;
 684
 685         // the first entry should not be stored
 686         store_this_entry = 0;
 687         first_entry = 1;
 688
 689         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 690             debug(D_RRD_STATS, "%s: has not set last_collected_time. Setting it now. Will not store the next entry.", st->name);
 691     }
 692     else {
 693         // it is not the first entry
 694         // calculate the proper last_collected_time, using usec_since_last_update
 695         last_collect_ut = rrdset_update_last_collected_time(st);
 696     }
 697
 698     // if this set has not been updated in the past
 699     // we fake the last_update time to be = now - usec_since_last_update
 700     if(unlikely(!st->last_updated.tv_sec)) {
 701         // it has never been updated before
 702         // set a fake last_updated, in the past using usec_since_last_update
 703         rrdset_init_last_updated_time(st);
 704
 705         // the first entry should not be stored
 706         store_this_entry = 0;
 707         first_entry = 1;
 708
 709         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 710             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);
 711     }
 712
 713     // check if we will re-write the entire data set
 714     if(unlikely(dt_usec(&st->last_collected_time, &st->last_updated) > st->entries * update_every_ut)) {
 715         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);
 716         rrdset_reset(st);
 717         rrdset_init_last_updated_time(st);
 718
 719         st->usec_since_last_update = update_every_ut;
 720
 721         // the first entry should not be stored
 722         store_this_entry = 0;
 723         first_entry = 1;
 724     }
 725
 726     // these are the 3 variables that will help us in interpolation
 727     // last_stored_ut = the last time we added a value to the storage
 728     // now_collect_ut = the time the current value has been collected
 729     // next_store_ut  = the time of the next interpolation point
 730     last_stored_ut = st->last_updated.tv_sec * USEC_PER_SEC + st->last_updated.tv_usec;
 731     now_collect_ut = st->last_collected_time.tv_sec * USEC_PER_SEC + st->last_collected_time.tv_usec;
 732     next_store_ut  = (st->last_updated.tv_sec + st->update_every) * USEC_PER_SEC;
 733
 734     if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG))) {
 735         debug(D_RRD_STATS, "%s: last_collect_ut = %0.3Lf (last collection time)", st->name, (long double)last_collect_ut/1000000.0);
 736         debug(D_RRD_STATS, "%s: now_collect_ut  = %0.3Lf (current collection time)", st->name, (long double)now_collect_ut/1000000.0);
 737         debug(D_RRD_STATS, "%s: last_stored_ut  = %0.3Lf (last updated time)", st->name, (long double)last_stored_ut/1000000.0);
 738         debug(D_RRD_STATS, "%s: next_store_ut   = %0.3Lf (next interpolation point)", st->name, (long double)next_store_ut/1000000.0);
 739     }
 740
 741     if(unlikely(!st->counter_done)) {
 742         store_this_entry = 0;
 743         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 744             debug(D_RRD_STATS, "%s: Will not store the next entry.", st->name);
 745     }
 746     st->counter_done++;
 747
 748     // calculate totals and count the dimensions
 749     int dimensions = 0;
 750     st->collected_total = 0;
 751     rrddim_foreach_read(rd, st) {
 752         dimensions++;
 753         if(likely(rrddim_flag_check(rd, RRDDIM_FLAG_UPDATED)))
 754             st->collected_total += rd->collected_value;
 755     }
 756
 757     uint32_t storage_flags = SN_EXISTS;
 758
 759     // process all dimensions to calculate their values
 760     // based on the collected figures only
 761     // at this stage we do not interpolate anything
 762     rrddim_foreach_read(rd, st) {
 763
 764         if(unlikely(!rrddim_flag_check(rd, RRDDIM_FLAG_UPDATED))) {
 765             rd->calculated_value = 0;
 766             continue;
 767         }
 768
 769         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 770             debug(D_RRD_STATS, "%s/%s: START "
 771                     " last_collected_value = " COLLECTED_NUMBER_FORMAT
 772                     " collected_value = " COLLECTED_NUMBER_FORMAT
 773                     " last_calculated_value = " CALCULATED_NUMBER_FORMAT
 774                     " calculated_value = " CALCULATED_NUMBER_FORMAT
 775                                       , st->id, rd->name
 776                                       , rd->last_collected_value
 777                                       , rd->collected_value
 778                                       , rd->last_calculated_value
 779                                       , rd->calculated_value
 780             );
 781
 782         switch(rd->algorithm) {
 783             case RRD_ALGORITHM_ABSOLUTE:
 784                 rd->calculated_value = (calculated_number)rd->collected_value
 785                                        * (calculated_number)rd->multiplier
 786                                        / (calculated_number)rd->divisor;
 787
 788                 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 789                     debug(D_RRD_STATS, "%s/%s: CALC ABS/ABS-NO-IN "
 790                             CALCULATED_NUMBER_FORMAT " = "
 791                             COLLECTED_NUMBER_FORMAT
 792                             " * " CALCULATED_NUMBER_FORMAT
 793                             " / " CALCULATED_NUMBER_FORMAT
 794                           , st->id, rd->name
 795                           , rd->calculated_value
 796                           , rd->collected_value
 797                           , (calculated_number)rd->multiplier
 798                           , (calculated_number)rd->divisor
 799                     );
 800                 break;
 801
 802             case RRD_ALGORITHM_PCENT_OVER_ROW_TOTAL:
 803                 if(unlikely(!st->collected_total))
 804                     rd->calculated_value = 0;
 805                 else
 806                     // the percentage of the current value
 807                     // over the total of all dimensions
 808                     rd->calculated_value =
 809                             (calculated_number)100
 810                             * (calculated_number)rd->collected_value
 811                             / (calculated_number)st->collected_total;
 812
 813                 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 814                     debug(D_RRD_STATS, "%s/%s: CALC PCENT-ROW "
 815                             CALCULATED_NUMBER_FORMAT " = 100"
 816                                     " * " COLLECTED_NUMBER_FORMAT
 817                             " / " COLLECTED_NUMBER_FORMAT
 818                           , st->id, rd->name
 819                           , rd->calculated_value
 820                           , rd->collected_value
 821                           , st->collected_total
 822                     );
 823                 break;
 824
 825             case RRD_ALGORITHM_INCREMENTAL:
 826                 if(unlikely(rd->counter <= 1)) {
 827                     rd->calculated_value = 0;
 828                     continue;
 829                 }
 830
 831                 // if the new is smaller than the old (an overflow, or reset), set the old equal to the new
 832                 // to reset the calculation (it will give zero as the calculation for this second)
 833                 if(unlikely(rd->last_collected_value > rd->collected_value)) {
 834                     debug(D_RRD_STATS, "%s.%s: RESET or OVERFLOW. Last collected value = " COLLECTED_NUMBER_FORMAT ", current = " COLLECTED_NUMBER_FORMAT
 835                           , st->name, rd->name
 836                           , rd->last_collected_value
 837                           , rd->collected_value);
 838
 839                     if(!(rrddim_flag_check(rd, RRDDIM_FLAG_DONT_DETECT_RESETS_OR_OVERFLOWS)))
 840                         storage_flags = SN_EXISTS_RESET;
 841
 842                     rd->last_collected_value = rd->collected_value;
 843                 }
 844
 845                 rd->calculated_value +=
 846                         (calculated_number)(rd->collected_value - rd->last_collected_value)
 847                         * (calculated_number)rd->multiplier
 848                         / (calculated_number)rd->divisor;
 849
 850                 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 851                     debug(D_RRD_STATS, "%s/%s: CALC INC PRE "
 852                             CALCULATED_NUMBER_FORMAT " = ("
 853                             COLLECTED_NUMBER_FORMAT " - " COLLECTED_NUMBER_FORMAT
 854                             ")"
 855                                     " * " CALCULATED_NUMBER_FORMAT
 856                             " / " CALCULATED_NUMBER_FORMAT
 857                           , st->id, rd->name
 858                           , rd->calculated_value
 859                           , rd->collected_value, rd->last_collected_value
 860                           , (calculated_number)rd->multiplier
 861                           , (calculated_number)rd->divisor
 862                     );
 863                 break;
 864
 865             case RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL:
 866                 if(unlikely(rd->counter <= 1)) {
 867                     rd->calculated_value = 0;
 868                     continue;
 869                 }
 870
 871                 // if the new is smaller than the old (an overflow, or reset), set the old equal to the new
 872                 // to reset the calculation (it will give zero as the calculation for this second)
 873                 if(unlikely(rd->last_collected_value > rd->collected_value)) {
 874                     debug(D_RRD_STATS, "%s.%s: RESET or OVERFLOW. Last collected value = " COLLECTED_NUMBER_FORMAT ", current = " COLLECTED_NUMBER_FORMAT
 875                           , st->name, rd->name
 876                           , rd->last_collected_value
 877                           , rd->collected_value);
 878
 879                     if(!(rrddim_flag_check(rd, RRDDIM_FLAG_DONT_DETECT_RESETS_OR_OVERFLOWS)))
 880                         storage_flags = SN_EXISTS_RESET;
 881
 882                     rd->last_collected_value = rd->collected_value;
 883                 }
 884
 885                 // the percentage of the current increment
 886                 // over the increment of all dimensions together
 887                 if(unlikely(st->collected_total == st->last_collected_total))
 888                     rd->calculated_value = 0;
 889                 else
 890                     rd->calculated_value =
 891                             (calculated_number)100
 892                             * (calculated_number)(rd->collected_value - rd->last_collected_value)
 893                             / (calculated_number)(st->collected_total - st->last_collected_total);
 894
 895                 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 896                     debug(D_RRD_STATS, "%s/%s: CALC PCENT-DIFF "
 897                             CALCULATED_NUMBER_FORMAT " = 100"
 898                                     " * (" COLLECTED_NUMBER_FORMAT " - " COLLECTED_NUMBER_FORMAT ")"
 899                                     " / (" COLLECTED_NUMBER_FORMAT " - " COLLECTED_NUMBER_FORMAT ")"
 900                           , st->id, rd->name
 901                           , rd->calculated_value
 902                           , rd->collected_value, rd->last_collected_value
 903                           , st->collected_total, st->last_collected_total
 904                     );
 905                 break;
 906
 907             default:
 908                 // make the default zero, to make sure
 909                 // it gets noticed when we add new types
 910                 rd->calculated_value = 0;
 911
 912                 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 913                     debug(D_RRD_STATS, "%s/%s: CALC "
 914                             CALCULATED_NUMBER_FORMAT " = 0"
 915                           , st->id, rd->name
 916                           , rd->calculated_value
 917                     );
 918                 break;
 919         }
 920
 921         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 922             debug(D_RRD_STATS, "%s/%s: PHASE2 "
 923                     " last_collected_value = " COLLECTED_NUMBER_FORMAT
 924                     " collected_value = " COLLECTED_NUMBER_FORMAT
 925                     " last_calculated_value = " CALCULATED_NUMBER_FORMAT
 926                     " calculated_value = " CALCULATED_NUMBER_FORMAT
 927                                       , st->id, rd->name
 928                                       , rd->last_collected_value
 929                                       , rd->collected_value
 930                                       , rd->last_calculated_value
 931                                       , rd->calculated_value
 932             );
 933
 934     }
 935
 936     // at this point we have all the calculated values ready
 937     // it is now time to interpolate values on a second boundary
 938
 939     if(unlikely(now_collect_ut < next_store_ut)) {
 940         // this is collected in the same interpolation point
 941
 942         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 943             debug(D_RRD_STATS, "%s: THIS IS IN THE SAME INTERPOLATION POINT", st->name);
 944
 945 //#ifdef NETDATA_INTERNAL_CHECKS
 946 //        info("%s is collected in the same interpolation point: short by %llu microseconds", st->name, next_store_ut - now_collect_ut);
 947 //#endif
 948     }
 949
 950     usec_t first_ut = last_stored_ut;
 951     long long iterations = (now_collect_ut - last_stored_ut) / (update_every_ut);
 952     if((now_collect_ut % (update_every_ut)) == 0) iterations++;
 953
 954     for( ; next_store_ut <= now_collect_ut ; last_collect_ut = next_store_ut, next_store_ut += update_every_ut, iterations-- ) {
 955 //#ifdef NETDATA_INTERNAL_CHECKS
 956 //        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); }
 957 //#endif
 958
 959         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG))) {
 960             debug(D_RRD_STATS, "%s: last_stored_ut = %0.3Lf (last updated time)", st->name, (long double)last_stored_ut/1000000.0);
 961             debug(D_RRD_STATS, "%s: next_store_ut  = %0.3Lf (next interpolation point)", st->name, (long double)next_store_ut/1000000.0);
 962         }
 963
 964         st->last_updated.tv_sec = (time_t) (next_store_ut / USEC_PER_SEC);
 965         st->last_updated.tv_usec = 0;
 966
 967         rrddim_foreach_read(rd, st) {
 968             calculated_number new_value;
 969
 970             switch(rd->algorithm) {
 971                 case RRD_ALGORITHM_INCREMENTAL:
 972                     new_value = (calculated_number)
 973                             (      rd->calculated_value
 974                                    * (calculated_number)(next_store_ut - last_collect_ut)
 975                                    / (calculated_number)(now_collect_ut - last_collect_ut)
 976                             );
 977
 978                     if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 979                         debug(D_RRD_STATS, "%s/%s: CALC2 INC "
 980                                 CALCULATED_NUMBER_FORMAT " = "
 981                                 CALCULATED_NUMBER_FORMAT
 982                                 " * %llu"
 983                                         " / %llu"
 984                               , st->id, rd->name
 985                               , new_value
 986                               , rd->calculated_value
 987                               , (next_store_ut - last_stored_ut)
 988                               , (now_collect_ut - last_stored_ut)
 989                         );
 990
 991                     rd->calculated_value -= new_value;
 992                     new_value += rd->last_calculated_value;
 993                     rd->last_calculated_value = 0;
 994                     new_value /= (calculated_number)st->update_every;
 995
 996                     if(unlikely(next_store_ut - last_stored_ut < update_every_ut)) {
 997                         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 998                             debug(D_RRD_STATS, "%s/%s: COLLECTION POINT IS SHORT " CALCULATED_NUMBER_FORMAT " - EXTRAPOLATING",
 999                                     st->id, rd->name
1000                                   , (calculated_number)(next_store_ut - last_stored_ut)
1001                             );
1002                         new_value = new_value * (calculated_number)(st->update_every * 1000000) / (calculated_number)(next_store_ut - last_stored_ut);
1003                     }
1004                     break;
1005
1006                 case RRD_ALGORITHM_ABSOLUTE:
1007                 case RRD_ALGORITHM_PCENT_OVER_ROW_TOTAL:
1008                 case RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL:
1009                 default:
1010                     if(iterations == 1) {
1011                         // this is the last iteration
1012                         // do not interpolate
1013                         // just show the calculated value
1014
1015                         new_value = rd->calculated_value;
1016                     }
1017                     else {
1018                         // we have missed an update
1019                         // interpolate in the middle values
1020
1021                         new_value = (calculated_number)
1022                                 (   (     (rd->calculated_value - rd->last_calculated_value)
1023                                           * (calculated_number)(next_store_ut - last_collect_ut)
1024                                           / (calculated_number)(now_collect_ut - last_collect_ut)
1025                                     )
1026                                     +  rd->last_calculated_value
1027                                 );
1028
1029                         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1030                             debug(D_RRD_STATS, "%s/%s: CALC2 DEF "
1031                                     CALCULATED_NUMBER_FORMAT " = ((("
1032                                             "(" CALCULATED_NUMBER_FORMAT " - " CALCULATED_NUMBER_FORMAT ")"
1033                                             " * %llu"
1034                                             " / %llu) + " CALCULATED_NUMBER_FORMAT
1035                                   , st->id, rd->name
1036                                   , new_value
1037                                   , rd->calculated_value, rd->last_calculated_value
1038                                   , (next_store_ut - first_ut)
1039                                   , (now_collect_ut - first_ut), rd->last_calculated_value
1040                             );
1041                     }
1042                     break;
1043             }
1044
1045             if(unlikely(!store_this_entry)) {
1046                 rd->values[st->current_entry] = pack_storage_number(0, SN_NOT_EXISTS);
1047                 continue;
1048             }
1049
1050             if(likely(rrddim_flag_check(rd, RRDDIM_FLAG_UPDATED) && rd->counter > 1 && iterations < st->gap_when_lost_iterations_above)) {
1051                 rd->values[st->current_entry] = pack_storage_number(new_value, storage_flags );
1052                 rd->last_stored_value = new_value;
1053
1054                 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1055                     debug(D_RRD_STATS, "%s/%s: STORE[%ld] "
1056                             CALCULATED_NUMBER_FORMAT " = " CALCULATED_NUMBER_FORMAT
1057                           , st->id, rd->name
1058                           , st->current_entry
1059                           , unpack_storage_number(rd->values[st->current_entry]), new_value
1060                     );
1061             }
1062             else {
1063                 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1064                     debug(D_RRD_STATS, "%s/%s: STORE[%ld] = NON EXISTING "
1065                           , st->id, rd->name
1066                           , st->current_entry
1067                     );
1068                 rd->values[st->current_entry] = pack_storage_number(0, SN_NOT_EXISTS);
1069                 rd->last_stored_value = NAN;
1070             }
1071
1072             stored_entries++;
1073
1074             if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG))) {
1075                 calculated_number t1 = new_value * (calculated_number)rd->multiplier / (calculated_number)rd->divisor;
1076                 calculated_number t2 = unpack_storage_number(rd->values[st->current_entry]);
1077                 calculated_number accuracy = accuracy_loss(t1, t2);
1078                 debug(D_RRD_STATS, "%s/%s: UNPACK[%ld] = " CALCULATED_NUMBER_FORMAT " FLAGS=0x%08x (original = " CALCULATED_NUMBER_FORMAT ", accuracy loss = " CALCULATED_NUMBER_FORMAT "%%%s)"
1079                       , st->id, rd->name
1080                       , st->current_entry
1081                       , t2
1082                       , get_storage_number_flags(rd->values[st->current_entry])
1083                       , t1
1084                       , accuracy
1085                       , (accuracy > ACCURACY_LOSS) ? " **TOO BIG** " : ""
1086                 );
1087
1088                 rd->collected_volume += t1;
1089                 rd->stored_volume += t2;
1090                 accuracy = accuracy_loss(rd->collected_volume, rd->stored_volume);
1091                 debug(D_RRD_STATS, "%s/%s: VOLUME[%ld] = " CALCULATED_NUMBER_FORMAT ", calculated  = " CALCULATED_NUMBER_FORMAT ", accuracy loss = " CALCULATED_NUMBER_FORMAT "%%%s"
1092                       , st->id, rd->name
1093                       , st->current_entry
1094                       , rd->stored_volume
1095                       , rd->collected_volume
1096                       , accuracy
1097                       , (accuracy > ACCURACY_LOSS) ? " **TOO BIG** " : ""
1098                 );
1099
1100             }
1101         }
1102         // reset the storage flags for the next point, if any;
1103         storage_flags = SN_EXISTS;
1104
1105         st->counter++;
1106         st->current_entry = ((st->current_entry + 1) >= st->entries) ? 0 : st->current_entry + 1;
1107         last_stored_ut = next_store_ut;
1108     }
1109
1110     st->last_collected_total  = st->collected_total;
1111
1112     rrddim_foreach_read(rd, st) {
1113         if(unlikely(!rrddim_flag_check(rd, RRDDIM_FLAG_UPDATED)))
1114             continue;
1115
1116         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1117             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);
1118
1119         rd->last_collected_value = rd->collected_value;
1120
1121         switch(rd->algorithm) {
1122             case RRD_ALGORITHM_INCREMENTAL:
1123                 if(unlikely(!first_entry)) {
1124                     if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1125                         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);
1126                     rd->last_calculated_value += rd->calculated_value;
1127                 }
1128                 else {
1129                     if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1130                         debug(D_RRD_STATS, "%s: THIS IS THE FIRST POINT", st->name);
1131                 }
1132                 break;
1133
1134             case RRD_ALGORITHM_ABSOLUTE:
1135             case RRD_ALGORITHM_PCENT_OVER_ROW_TOTAL:
1136             case RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL:
1137                 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1138                     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);
1139                 rd->last_calculated_value = rd->calculated_value;
1140                 break;
1141         }
1142
1143         rd->calculated_value = 0;
1144         rd->collected_value = 0;
1145         rrddim_flag_clear(rd, RRDDIM_FLAG_UPDATED);
1146
1147         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1148             debug(D_RRD_STATS, "%s/%s: END "
1149                     " last_collected_value = " COLLECTED_NUMBER_FORMAT
1150                     " collected_value = " COLLECTED_NUMBER_FORMAT
1151                     " last_calculated_value = " CALCULATED_NUMBER_FORMAT
1152                     " calculated_value = " CALCULATED_NUMBER_FORMAT
1153                                       , st->id, rd->name
1154                                       , rd->last_collected_value
1155                                       , rd->collected_value
1156                                       , rd->last_calculated_value
1157                                       , rd->calculated_value
1158             );
1159     }
1160
1161     // ALL DONE ABOUT THE DATA UPDATE
1162     // --------------------------------------------------------------------
1163
1164 /*
1165     // find if there are any obsolete dimensions (not updated recently)
1166     if(unlikely(rrd_delete_unupdated_dimensions)) {
1167
1168         for( rd = st->dimensions; likely(rd) ; rd = rd->next )
1169             if((rd->last_collected_time.tv_sec + (rrd_delete_unupdated_dimensions * st->update_every)) < st->last_collected_time.tv_sec)
1170                 break;
1171
1172         if(unlikely(rd)) {
1173             RRDDIM *last;
1174             // there is dimension to free
1175             // upgrade our read lock to a write lock
1176             pthread_rwlock_unlock(&st->rrdset_rwlock);
1177             pthread_rwlock_wrlock(&st->rrdset_rwlock);
1178
1179             for( rd = st->dimensions, last = NULL ; likely(rd) ; ) {
1180                 // remove it only it is not updated in rrd_delete_unupdated_dimensions seconds
1181
1182                 if(unlikely((rd->last_collected_time.tv_sec + (rrd_delete_unupdated_dimensions * st->update_every)) < st->last_collected_time.tv_sec)) {
1183                     info("Removing obsolete dimension '%s' (%s) of '%s' (%s).", rd->name, rd->id, st->name, st->id);
1184
1185                     if(unlikely(!last)) {
1186                         st->dimensions = rd->next;
1187                         rd->next = NULL;
1188                         rrddim_free(st, rd);
1189                         rd = st->dimensions;
1190                         continue;
1191                     }
1192                     else {
1193                         last->next = rd->next;
1194                         rd->next = NULL;
1195                         rrddim_free(st, rd);
1196                         rd = last->next;
1197                         continue;
1198                     }
1199                 }
1200
1201                 last = rd;
1202                 rd = rd->next;
1203             }
1204
1205             if(unlikely(!st->dimensions)) {
1206                 info("Disabling chart %s (%s) since it does not have any dimensions", st->name, st->id);
1207                 st->enabled = 0;
1208             }
1209         }
1210     }
1211 */
1212
1213     rrdset_unlock(st);
1214
1215     if(unlikely(pthread_setcancelstate(pthreadoldcancelstate, NULL) != 0))
1216         error("Cannot set pthread cancel state to RESTORE (%d).", pthreadoldcancelstate);
1217
1218     if(unlikely(rrdpush_enabled))
1219         rrdset_done_push_int(st);
1220 }
1221