src/rrdset.c

   1 #define NETDATA_RRD_INTERNALS 1
   2 #include "common.h"
   3
   4 #define RRD_DEFAULT_GAP_INTERPOLATIONS 1
   5
   6 void rrdset_check_rdlock_int(RRDSET *st, const char *file, const char *function, const unsigned long line) {
   7     debug(D_RRD_CALLS, "Checking read lock on chart '%s'", st->id);
   8
   9     int ret = pthread_rwlock_trywrlock(&st->rrdset_rwlock);
  10     if(ret == 0)
  11         fatal("RRDSET '%s' should be read-locked, but it is not, at function %s() at line %lu of file '%s'", st->id, function, line, file);
  12 }
  13
  14 void rrdset_check_wrlock_int(RRDSET *st, const char *file, const char *function, const unsigned long line) {
  15     debug(D_RRD_CALLS, "Checking write lock on chart '%s'", st->id);
  16
  17     int ret = pthread_rwlock_tryrdlock(&st->rrdset_rwlock);
  18     if(ret == 0)
  19         fatal("RRDSET '%s' should be write-locked, but it is not, at function %s() at line %lu of file '%s'", st->id, function, line, file);
  20 }
  21
  22
  23 // ----------------------------------------------------------------------------
  24 // RRDSET index
  25
  26 int rrdset_compare(void* a, void* b) {
  27     if(((RRDSET *)a)->hash < ((RRDSET *)b)->hash) return -1;
  28     else if(((RRDSET *)a)->hash > ((RRDSET *)b)->hash) return 1;
  29     else return strcmp(((RRDSET *)a)->id, ((RRDSET *)b)->id);
  30 }
  31
  32 static RRDSET *rrdset_index_find(RRDHOST *host, const char *id, uint32_t hash) {
  33     RRDSET tmp;
  34     strncpyz(tmp.id, id, RRD_ID_LENGTH_MAX);
  35     tmp.hash = (hash)?hash:simple_hash(tmp.id);
  36
  37     return (RRDSET *)avl_search_lock(&(host->rrdset_root_index), (avl *) &tmp);
  38 }
  39
  40 // ----------------------------------------------------------------------------
  41 // RRDSET name index
  42
  43 #define rrdset_from_avlname(avlname_ptr) ((RRDSET *)((avlname_ptr) - offsetof(RRDSET, avlname)))
  44
  45 int rrdset_compare_name(void* a, void* b) {
  46     RRDSET *A = rrdset_from_avlname(a);
  47     RRDSET *B = rrdset_from_avlname(b);
  48
  49     // fprintf(stderr, "COMPARING: %s with %s\n", A->name, B->name);
  50
  51     if(A->hash_name < B->hash_name) return -1;
  52     else if(A->hash_name > B->hash_name) return 1;
  53     else return strcmp(A->name, B->name);
  54 }
  55
  56 RRDSET *rrdset_index_add_name(RRDHOST *host, RRDSET *st) {
  57     void *result;
  58     // fprintf(stderr, "ADDING: %s (name: %s)\n", st->id, st->name);
  59     result = avl_insert_lock(&host->rrdset_root_index_name, (avl *) (&st->avlname));
  60     if(result) return rrdset_from_avlname(result);
  61     return NULL;
  62 }
  63
  64 RRDSET *rrdset_index_del_name(RRDHOST *host, RRDSET *st) {
  65     void *result;
  66     // fprintf(stderr, "DELETING: %s (name: %s)\n", st->id, st->name);
  67     result = (RRDSET *)avl_remove_lock(&((host)->rrdset_root_index_name), (avl *)(&st->avlname));
  68     if(result) return rrdset_from_avlname(result);
  69     return NULL;
  70 }
  71
  72
  73 // ----------------------------------------------------------------------------
  74 // RRDSET - find charts
  75
  76 static inline RRDSET *rrdset_index_find_name(RRDHOST *host, const char *name, uint32_t hash) {
  77     void *result = NULL;
  78     RRDSET tmp;
  79     tmp.name = name;
  80     tmp.hash_name = (hash)?hash:simple_hash(tmp.name);
  81
  82     // fprintf(stderr, "SEARCHING: %s\n", name);
  83     result = avl_search_lock(&host->rrdset_root_index_name, (avl *) (&(tmp.avlname)));
  84     if(result) {
  85         RRDSET *st = rrdset_from_avlname(result);
  86         if(strcmp(st->magic, RRDSET_MAGIC))
  87             error("Search for RRDSET %s returned an invalid RRDSET %s (name %s)", name, st->id, st->name);
  88
  89         // fprintf(stderr, "FOUND: %s\n", name);
  90         return rrdset_from_avlname(result);
  91     }
  92     // fprintf(stderr, "NOT FOUND: %s\n", name);
  93     return NULL;
  94 }
  95
  96 inline RRDSET *rrdset_find(RRDHOST *host, const char *id) {
  97     debug(D_RRD_CALLS, "rrdset_find() for chart '%s' in host '%s'", id, host->hostname);
  98     RRDSET *st = rrdset_index_find(host, id, 0);
  99     return(st);
 100 }
 101
 102 inline RRDSET *rrdset_find_bytype(RRDHOST *host, const char *type, const char *id) {
 103     debug(D_RRD_CALLS, "rrdset_find_bytype() for chart '%s.%s' in host '%s'", type, id, host->hostname);
 104
 105     char buf[RRD_ID_LENGTH_MAX + 1];
 106     strncpyz(buf, type, RRD_ID_LENGTH_MAX - 1);
 107     strcat(buf, ".");
 108     int len = (int) strlen(buf);
 109     strncpyz(&buf[len], id, (size_t) (RRD_ID_LENGTH_MAX - len));
 110
 111     return(rrdset_find(host, buf));
 112 }
 113
 114 inline RRDSET *rrdset_find_byname(RRDHOST *host, const char *name) {
 115     debug(D_RRD_CALLS, "rrdset_find_byname() for chart '%s' in host '%s'", name, host->hostname);
 116     RRDSET *st = rrdset_index_find_name(host, name, 0);
 117     return(st);
 118 }
 119
 120 // ----------------------------------------------------------------------------
 121 // RRDSET - rename charts
 122
 123 char *rrdset_strncpyz_name(char *to, const char *from, size_t length) {
 124     char c, *p = to;
 125
 126     while (length-- && (c = *from++)) {
 127         if(c != '.' && !isalnum(c))
 128             c = '_';
 129
 130         *p++ = c;
 131     }
 132
 133     *p = '\0';
 134
 135     return to;
 136 }
 137
 138 void rrdset_set_name(RRDSET *st, const char *name) {
 139     if(unlikely(st->name && !strcmp(st->name, name)))
 140         return;
 141
 142     debug(D_RRD_CALLS, "rrdset_set_name() old: %s, new: %s", st->name, name);
 143
 144     char b[CONFIG_MAX_VALUE + 1];
 145     char n[RRD_ID_LENGTH_MAX + 1];
 146
 147     snprintfz(n, RRD_ID_LENGTH_MAX, "%s.%s", st->type, name);
 148     rrdset_strncpyz_name(b, n, CONFIG_MAX_VALUE);
 149
 150     if(st->name) {
 151         rrdset_index_del_name(st->rrdhost, st);
 152         st->name = config_set_default(st->config_section, "name", b);
 153         st->hash_name = simple_hash(st->name);
 154         rrdsetvar_rename_all(st);
 155     }
 156     else {
 157         st->name = config_get(st->config_section, "name", b);
 158         st->hash_name = simple_hash(st->name);
 159     }
 160
 161     rrdset_wrlock(st);
 162     RRDDIM *rd;
 163     rrddim_foreach_write(rd, st)
 164         rrddimvar_rename_all(rd);
 165     rrdset_unlock(st);
 166
 167     if(unlikely(rrdset_index_add_name(st->rrdhost, st) != st))
 168         error("RRDSET: INTERNAL ERROR: attempted to index duplicate chart name '%s'", st->name);
 169 }
 170
 171
 172 // ----------------------------------------------------------------------------
 173 // RRDSET - reset a chart
 174
 175 void rrdset_reset(RRDSET *st) {
 176     debug(D_RRD_CALLS, "rrdset_reset() %s", st->name);
 177
 178     st->last_collected_time.tv_sec = 0;
 179     st->last_collected_time.tv_usec = 0;
 180     st->last_updated.tv_sec = 0;
 181     st->last_updated.tv_usec = 0;
 182     st->current_entry = 0;
 183     st->counter = 0;
 184     st->counter_done = 0;
 185
 186     RRDDIM *rd;
 187     rrddim_foreach_read(rd, st) {
 188         rd->last_collected_time.tv_sec = 0;
 189         rd->last_collected_time.tv_usec = 0;
 190         rd->collections_counter = 0;
 191         memset(rd->values, 0, rd->entries * sizeof(storage_number));
 192     }
 193 }
 194
 195 // ----------------------------------------------------------------------------
 196 // RRDSET - helpers for rrdset_create()
 197
 198 inline long align_entries_to_pagesize(RRD_MEMORY_MODE mode, long entries) {
 199     if(unlikely(entries < 5)) entries = 5;
 200     if(unlikely(entries > RRD_HISTORY_ENTRIES_MAX)) entries = RRD_HISTORY_ENTRIES_MAX;
 201
 202     if(unlikely(mode == RRD_MEMORY_MODE_NONE || mode == RRD_MEMORY_MODE_RAM))
 203         return entries;
 204
 205     long page = (size_t)sysconf(_SC_PAGESIZE);
 206     long size = sizeof(RRDDIM) + entries * sizeof(storage_number);
 207     if(unlikely(size % page)) {
 208         size -= (size % page);
 209         size += page;
 210
 211         long n = (size - sizeof(RRDDIM)) / sizeof(storage_number);
 212         return n;
 213     }
 214
 215     return entries;
 216 }
 217
 218 static inline void last_collected_time_align(struct timeval *tv, int update_every) {
 219     tv->tv_sec -= tv->tv_sec % update_every;
 220     tv->tv_usec = 500000;
 221 }
 222
 223 static inline void last_updated_time_align(struct timeval *tv, int update_every) {
 224     tv->tv_sec -= tv->tv_sec % update_every;
 225     tv->tv_usec = 0;
 226 }
 227
 228 // ----------------------------------------------------------------------------
 229 // RRDSET - free a chart
 230
 231 void rrdset_free(RRDSET *st) {
 232     if(unlikely(!st)) return;
 233
 234     rrdhost_check_wrlock(st->rrdhost);  // make sure we have a write lock on the host
 235     rrdset_wrlock(st);                  // lock this RRDSET
 236
 237     // info("Removing chart '%s' ('%s')", st->id, st->name);
 238
 239     // ------------------------------------------------------------------------
 240     // remove it from the indexes
 241
 242     if(unlikely(rrdset_index_del(st->rrdhost, st) != st))
 243         error("RRDSET: INTERNAL ERROR: attempt to remove from index chart '%s', removed a different chart.", st->id);
 244
 245     rrdset_index_del_name(st->rrdhost, st);
 246
 247     // ------------------------------------------------------------------------
 248     // free its children structures
 249
 250     while(st->variables)  rrdsetvar_free(st->variables);
 251     while(st->alarms)     rrdsetcalc_unlink(st->alarms);
 252     while(st->dimensions) rrddim_free(st, st->dimensions);
 253
 254     rrdfamily_free(st->rrdhost, st->rrdfamily);
 255
 256     // ------------------------------------------------------------------------
 257     // unlink it from the host
 258
 259     if(st == st->rrdhost->rrdset_root) {
 260         st->rrdhost->rrdset_root = st->next;
 261     }
 262     else {
 263         // find the previous one
 264         RRDSET *s;
 265         for(s = st->rrdhost->rrdset_root; s && s->next != st ; s = s->next) ;
 266
 267         // bypass it
 268         if(s) s->next = st->next;
 269         else error("Request to free RRDSET '%s': cannot find it under host '%s'", st->id, st->rrdhost->hostname);
 270     }
 271
 272     rrdset_unlock(st);
 273
 274     // ------------------------------------------------------------------------
 275     // free it
 276
 277     // free directly allocated members
 278     freez(st->config_section);
 279
 280     if(st->rrd_memory_mode == RRD_MEMORY_MODE_SAVE || st->rrd_memory_mode == RRD_MEMORY_MODE_MAP) {
 281         debug(D_RRD_CALLS, "Unmapping stats '%s'.", st->name);
 282         munmap(st, st->memsize);
 283     }
 284     else
 285         freez(st);
 286 }
 287
 288 void rrdset_save(RRDSET *st) {
 289     RRDDIM *rd;
 290
 291     rrdset_check_rdlock(st);
 292
 293     // info("Saving chart '%s' ('%s')", st->id, st->name);
 294
 295     if(st->rrd_memory_mode == RRD_MEMORY_MODE_SAVE) {
 296         debug(D_RRD_STATS, "Saving stats '%s' to '%s'.", st->name, st->cache_filename);
 297         savememory(st->cache_filename, st, st->memsize);
 298     }
 299
 300     rrddim_foreach_read(rd, st) {
 301         if(likely(rd->rrd_memory_mode == RRD_MEMORY_MODE_SAVE)) {
 302             debug(D_RRD_STATS, "Saving dimension '%s' to '%s'.", rd->name, rd->cache_filename);
 303             savememory(rd->cache_filename, rd, rd->memsize);
 304         }
 305     }
 306 }
 307
 308 void rrdset_delete(RRDSET *st) {
 309     RRDDIM *rd;
 310
 311     rrdset_check_rdlock(st);
 312
 313     // info("Deleting chart '%s' ('%s')", st->id, st->name);
 314
 315     if(st->rrd_memory_mode == RRD_MEMORY_MODE_SAVE) {
 316         debug(D_RRD_STATS, "Deleting stats '%s' to '%s'.", st->name, st->cache_filename);
 317         unlink(st->cache_filename);
 318     }
 319
 320     rrddim_foreach_read(rd, st) {
 321         if(likely(rd->rrd_memory_mode == RRD_MEMORY_MODE_SAVE)) {
 322             debug(D_RRD_STATS, "Deleting dimension '%s' to '%s'.", rd->name, rd->cache_filename);
 323             unlink(rd->cache_filename);
 324         }
 325     }
 326 }
 327
 328 // ----------------------------------------------------------------------------
 329 // RRDSET - create a chart
 330
 331 RRDSET *rrdset_create(
 332           RRDHOST *host
 333         , const char *type
 334         , const char *id
 335         , const char *name
 336         , const char *family
 337         , const char *context
 338         , const char *title
 339         , const char *units
 340         , long priority
 341         , int update_every
 342         , RRDSET_TYPE chart_type
 343 ) {
 344     if(!type || !type[0]) {
 345         fatal("Cannot create rrd stats without a type.");
 346         return NULL;
 347     }
 348
 349     if(!id || !id[0]) {
 350         fatal("Cannot create rrd stats without an id.");
 351         return NULL;
 352     }
 353
 354     // ------------------------------------------------------------------------
 355     // check if it already exists
 356
 357     char fullid[RRD_ID_LENGTH_MAX + 1];
 358     snprintfz(fullid, RRD_ID_LENGTH_MAX, "%s.%s", type, id);
 359
 360     RRDSET *st = rrdset_find(host, fullid);
 361     if(st) {
 362         rrdset_flag_clear(st, RRDSET_FLAG_OBSOLETE);
 363         debug(D_RRD_CALLS, "RRDSET '%s', already exists.", fullid);
 364         return st;
 365     }
 366
 367     char fullfilename[FILENAME_MAX + 1];
 368
 369     // ------------------------------------------------------------------------
 370     // compose the config_section for this chart
 371
 372     char config_section[RRD_ID_LENGTH_MAX + 1];
 373     if(host == localhost)
 374         strcpy(config_section, fullid);
 375     else
 376         snprintfz(config_section, RRD_ID_LENGTH_MAX, "%s/%s", host->machine_guid, fullid);
 377
 378     // ------------------------------------------------------------------------
 379     // get the options from the config, we need to create it
 380
 381     long rentries = config_get_number(config_section, "history", host->rrd_history_entries);
 382     long entries = align_entries_to_pagesize(host->rrd_memory_mode, rentries);
 383     if(entries != rentries) entries = config_set_number(config_section, "history", entries);
 384
 385     if(host->rrd_memory_mode == RRD_MEMORY_MODE_NONE && entries != rentries)
 386         entries = config_set_number(config_section, "history", 10);
 387
 388     int enabled = config_get_boolean(config_section, "enabled", 1);
 389     if(!enabled) entries = 5;
 390
 391     unsigned long size = sizeof(RRDSET);
 392     char *cache_dir = rrdset_cache_dir(host, fullid, config_section);
 393
 394     time_t now = now_realtime_sec();
 395
 396     // ------------------------------------------------------------------------
 397     // load it or allocate it
 398
 399     debug(D_RRD_CALLS, "Creating RRD_STATS for '%s.%s'.", type, id);
 400
 401     snprintfz(fullfilename, FILENAME_MAX, "%s/main.db", cache_dir);
 402     if(host->rrd_memory_mode == RRD_MEMORY_MODE_SAVE || host->rrd_memory_mode == RRD_MEMORY_MODE_MAP) {
 403         st = (RRDSET *) mymmap(fullfilename, size, ((host->rrd_memory_mode == RRD_MEMORY_MODE_MAP) ? MAP_SHARED : MAP_PRIVATE), 0);
 404         if(st) {
 405             memset(&st->avl, 0, sizeof(avl));
 406             memset(&st->avlname, 0, sizeof(avl));
 407             memset(&st->variables_root_index, 0, sizeof(avl_tree_lock));
 408             memset(&st->dimensions_index, 0, sizeof(avl_tree_lock));
 409             memset(&st->rrdset_rwlock, 0, sizeof(pthread_rwlock_t));
 410
 411             st->name = NULL;
 412             st->type = NULL;
 413             st->family = NULL;
 414             st->context = NULL;
 415             st->title = NULL;
 416             st->units = NULL;
 417             st->dimensions = NULL;
 418             st->next = NULL;
 419             st->variables = NULL;
 420             st->alarms = NULL;
 421             st->flags = 0x00000000;
 422
 423             if(strcmp(st->magic, RRDSET_MAGIC) != 0) {
 424                 errno = 0;
 425                 info("Initializing file %s.", fullfilename);
 426                 memset(st, 0, size);
 427             }
 428             else if(strcmp(st->id, fullid) != 0) {
 429                 errno = 0;
 430                 error("File %s contents are not for chart %s. Clearing it.", fullfilename, fullid);
 431                 // munmap(st, size);
 432                 // st = NULL;
 433                 memset(st, 0, size);
 434             }
 435             else if(st->memsize != size || st->entries != entries) {
 436                 errno = 0;
 437                 error("File %s does not have the desired size. Clearing it.", fullfilename);
 438                 memset(st, 0, size);
 439             }
 440             else if(st->update_every != update_every) {
 441                 errno = 0;
 442                 error("File %s does not have the desired update frequency. Clearing it.", fullfilename);
 443                 memset(st, 0, size);
 444             }
 445             else if((now - st->last_updated.tv_sec) > update_every * entries) {
 446                 errno = 0;
 447                 error("File %s is too old. Clearing it.", fullfilename);
 448                 memset(st, 0, size);
 449             }
 450             else if(st->last_updated.tv_sec > now + update_every) {
 451                 errno = 0;
 452                 error("File %s refers to the future. Clearing it.", fullfilename);
 453                 memset(st, 0, size);
 454             }
 455
 456             // make sure the database is aligned
 457             if(st->last_updated.tv_sec)
 458                 last_updated_time_align(&st->last_updated, update_every);
 459
 460
 461             // make sure we have the right memory mode
 462             // even if we cleared the memory
 463             st->rrd_memory_mode = host->rrd_memory_mode;
 464         }
 465     }
 466
 467     if(unlikely(!st)) {
 468         st = callocz(1, size);
 469         st->rrd_memory_mode = (host->rrd_memory_mode == RRD_MEMORY_MODE_NONE) ? RRD_MEMORY_MODE_NONE : RRD_MEMORY_MODE_RAM;
 470     }
 471
 472     st->config_section = strdup(config_section);
 473     st->rrdhost = host;
 474     st->memsize = size;
 475     st->entries = entries;
 476     st->update_every = update_every;
 477
 478     if(st->current_entry >= st->entries) st->current_entry = 0;
 479
 480     strcpy(st->cache_filename, fullfilename);
 481     strcpy(st->magic, RRDSET_MAGIC);
 482
 483     strcpy(st->id, fullid);
 484     st->hash = simple_hash(st->id);
 485
 486     st->cache_dir = cache_dir;
 487
 488     st->chart_type = rrdset_type_id(config_get(st->config_section, "chart type", rrdset_type_name(chart_type)));
 489     st->type       = config_get(st->config_section, "type", type);
 490     st->family     = config_get(st->config_section, "family", family?family:st->type);
 491     st->units      = config_get(st->config_section, "units", units?units:"");
 492
 493     st->context    = config_get(st->config_section, "context", context?context:st->id);
 494     st->hash_context = simple_hash(st->context);
 495
 496     st->priority = config_get_number(st->config_section, "priority", priority);
 497     if(enabled)
 498         rrdset_flag_set(st, RRDSET_FLAG_ENABLED);
 499     else
 500         rrdset_flag_clear(st, RRDSET_FLAG_ENABLED);
 501
 502     rrdset_flag_clear(st, RRDSET_FLAG_DETAIL);
 503     rrdset_flag_clear(st, RRDSET_FLAG_DEBUG);
 504     rrdset_flag_clear(st, RRDSET_FLAG_OBSOLETE);
 505
 506     // if(!strcmp(st->id, "disk_util.dm-0")) {
 507     //     st->debug = 1;
 508     //     error("enabled debugging for '%s'", st->id);
 509     // }
 510     // else error("not enabled debugging for '%s'", st->id);
 511
 512     st->green = NAN;
 513     st->red = NAN;
 514
 515     st->last_collected_time.tv_sec = 0;
 516     st->last_collected_time.tv_usec = 0;
 517     st->counter_done = 0;
 518
 519     st->gap_when_lost_iterations_above = (int) (
 520             config_get_number(st->config_section, "gap when lost iterations above", RRD_DEFAULT_GAP_INTERPOLATIONS) + 2);
 521
 522     avl_init_lock(&st->dimensions_index, rrddim_compare);
 523     avl_init_lock(&st->variables_root_index, rrdvar_compare);
 524
 525     pthread_rwlock_init(&st->rrdset_rwlock, NULL);
 526     rrdhost_wrlock(host);
 527
 528     if(name && *name) rrdset_set_name(st, name);
 529     else rrdset_set_name(st, id);
 530
 531     {
 532         char varvalue[CONFIG_MAX_VALUE + 1];
 533         char varvalue2[CONFIG_MAX_VALUE + 1];
 534         snprintfz(varvalue, CONFIG_MAX_VALUE, "%s (%s)", title?title:"", st->name);
 535         json_escape_string(varvalue2, varvalue, sizeof(varvalue2));
 536         st->title = config_get(st->config_section, "title", varvalue2);
 537     }
 538
 539     st->rrdfamily = rrdfamily_create(host, st->family);
 540
 541     st->next = host->rrdset_root;
 542     host->rrdset_root = st;
 543
 544     if(host->health_enabled) {
 545         rrdsetvar_create(st, "last_collected_t", RRDVAR_TYPE_TIME_T, &st->last_collected_time.tv_sec, 0);
 546         rrdsetvar_create(st, "collected_total_raw", RRDVAR_TYPE_TOTAL, &st->last_collected_total, 0);
 547         rrdsetvar_create(st, "green", RRDVAR_TYPE_CALCULATED, &st->green, 0);
 548         rrdsetvar_create(st, "red", RRDVAR_TYPE_CALCULATED, &st->red, 0);
 549         rrdsetvar_create(st, "update_every", RRDVAR_TYPE_INT, &st->update_every, 0);
 550     }
 551
 552     if(unlikely(rrdset_index_add(host, st) != st))
 553         error("RRDSET: INTERNAL ERROR: attempt to index duplicate chart '%s'", st->id);
 554
 555     rrdsetcalc_link_matching(st);
 556     rrdcalctemplate_link_matching(st);
 557
 558     rrdhost_cleanup_obsolete(host);
 559
 560     rrdhost_unlock(host);
 561
 562     return(st);
 563 }
 564
 565
 566 // ----------------------------------------------------------------------------
 567 // RRDSET - data collection iteration control
 568
 569 inline void rrdset_next_usec_unfiltered(RRDSET *st, usec_t microseconds) {
 570
 571     if(unlikely(!st->last_collected_time.tv_sec)) {
 572         // the first entry
 573         microseconds = st->update_every * USEC_PER_SEC;
 574     }
 575     else if(unlikely(!microseconds)) {
 576         // no dt given by the plugin
 577         struct timeval now;
 578         now_realtime_timeval(&now);
 579         microseconds = dt_usec(&now, &st->last_collected_time);
 580     }
 581
 582     st->usec_since_last_update = microseconds;
 583 }
 584
 585 inline void rrdset_next_usec(RRDSET *st, usec_t microseconds) {
 586     struct timeval now;
 587     now_realtime_timeval(&now);
 588
 589     if(unlikely(!st->last_collected_time.tv_sec)) {
 590         // the first entry
 591         microseconds = st->update_every * USEC_PER_SEC;
 592     }
 593     else if(unlikely(!microseconds)) {
 594         // no dt given by the plugin
 595         microseconds = dt_usec(&now, &st->last_collected_time);
 596     }
 597     else {
 598         // microseconds has the time since the last collection
 599 //#ifdef NETDATA_INTERNAL_CHECKS
 600 //        usec_t now_usec = timeval_usec(&now);
 601 //        usec_t last_usec = timeval_usec(&st->last_collected_time);
 602 //#endif
 603         susec_t since_last_usec = dt_usec_signed(&now, &st->last_collected_time);
 604
 605         if(unlikely(since_last_usec < 0)) {
 606             // oops! the database is in the future
 607             error("Database for chart '%s' on host '%s' is %lld microseconds in the future. Adjusting it to current time.", st->id, st->rrdhost->hostname, -since_last_usec);
 608
 609             st->last_collected_time.tv_sec  = now.tv_sec - st->update_every;
 610             st->last_collected_time.tv_usec = now.tv_usec;
 611             last_collected_time_align(&st->last_collected_time, st->update_every);
 612
 613             st->last_updated.tv_sec  = now.tv_sec - st->update_every;
 614             st->last_updated.tv_usec = now.tv_usec;
 615             last_updated_time_align(&st->last_updated, st->update_every);
 616
 617             microseconds    = st->update_every * USEC_PER_SEC;
 618             since_last_usec = st->update_every * USEC_PER_SEC;
 619         }
 620
 621         // verify the microseconds given is good
 622         if(unlikely(microseconds > (usec_t)since_last_usec)) {
 623             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);
 624
 625 //#ifdef NETDATA_INTERNAL_CHECKS
 626 //            if(unlikely(last_usec + microseconds > now_usec + 1000))
 627 //                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);
 628 //#endif
 629
 630             microseconds = (usec_t)since_last_usec;
 631         }
 632         else if(unlikely(microseconds < (usec_t)since_last_usec * 0.8)) {
 633             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);
 634
 635 //#ifdef NETDATA_INTERNAL_CHECKS
 636 //            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);
 637 //#endif
 638             microseconds = (usec_t)since_last_usec;
 639         }
 640     }
 641     debug(D_RRD_CALLS, "rrdset_next_usec() for chart %s with microseconds %llu", st->name, microseconds);
 642
 643     if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 644         debug(D_RRD_STATS, "%s: NEXT: %llu microseconds", st->name, microseconds);
 645
 646     st->usec_since_last_update = microseconds;
 647 }
 648
 649
 650 // ----------------------------------------------------------------------------
 651 // RRDSET - process the collected values for all dimensions of a chart
 652
 653 static inline void rrdset_init_last_collected_time(RRDSET *st) {
 654     now_realtime_timeval(&st->last_collected_time);
 655     last_collected_time_align(&st->last_collected_time, st->update_every);
 656 }
 657
 658 static inline usec_t rrdset_update_last_collected_time(RRDSET *st) {
 659     usec_t last_collect_ut = st->last_collected_time.tv_sec * USEC_PER_SEC + st->last_collected_time.tv_usec;
 660     usec_t ut = last_collect_ut + st->usec_since_last_update;
 661     st->last_collected_time.tv_sec = (time_t) (ut / USEC_PER_SEC);
 662     st->last_collected_time.tv_usec = (suseconds_t) (ut % USEC_PER_SEC);
 663     return last_collect_ut;
 664 }
 665
 666 static inline void rrdset_init_last_updated_time(RRDSET *st) {
 667     // copy the last collected time to last updated time
 668     st->last_updated.tv_sec  = st->last_collected_time.tv_sec;
 669     st->last_updated.tv_usec = st->last_collected_time.tv_usec;
 670     last_updated_time_align(&st->last_updated, st->update_every);
 671 }
 672
 673 static inline void rrdset_done_push_exclusive(RRDSET *st) {
 674     if(unlikely(!st->last_collected_time.tv_sec)) {
 675         // it is the first entry
 676         // set the last_collected_time to now
 677         rrdset_init_last_collected_time(st);
 678     }
 679     else {
 680         // it is not the first entry
 681         // calculate the proper last_collected_time, using usec_since_last_update
 682         rrdset_update_last_collected_time(st);
 683     }
 684
 685     st->counter_done++;
 686
 687     rrdset_rdlock(st);
 688     rrdset_done_push(st);
 689     rrdset_unlock(st);
 690 }
 691
 692 void rrdset_done(RRDSET *st) {
 693     if(unlikely(netdata_exit)) return;
 694
 695     if(unlikely(st->rrd_memory_mode == RRD_MEMORY_MODE_NONE)) {
 696         if(unlikely(st->rrdhost->rrdpush_enabled))
 697             rrdset_done_push_exclusive(st);
 698
 699         return;
 700     }
 701
 702     debug(D_RRD_CALLS, "rrdset_done() for chart %s", st->name);
 703
 704     RRDDIM *rd;
 705
 706     int
 707             pthreadoldcancelstate;  // store the old cancelable pthread state, to restore it at the end
 708
 709     char
 710             store_this_entry = 1,   // boolean: 1 = store this entry, 0 = don't store this entry
 711             first_entry = 0;        // boolean: 1 = this is the first entry seen for this chart, 0 = all other entries
 712
 713     unsigned int
 714             stored_entries = 0;     // the number of entries we have stored in the db, during this call to rrdset_done()
 715
 716     usec_t
 717             last_collect_ut,        // the timestamp in microseconds, of the last collected value
 718             now_collect_ut,         // the timestamp in microseconds, of this collected value (this is NOW)
 719             last_stored_ut,         // the timestamp in microseconds, of the last stored entry in the db
 720             next_store_ut,          // the timestamp in microseconds, of the next entry to store in the db
 721             update_every_ut = st->update_every * USEC_PER_SEC; // st->update_every in microseconds
 722
 723     if(unlikely(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &pthreadoldcancelstate) != 0))
 724         error("Cannot set pthread cancel state to DISABLE.");
 725
 726     // a read lock is OK here
 727     rrdset_rdlock(st);
 728
 729 /*
 730     // enable the chart, if it was disabled
 731     if(unlikely(rrd_delete_unupdated_dimensions) && !st->enabled)
 732         st->enabled = 1;
 733 */
 734
 735     if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_OBSOLETE))) {
 736         error("Chart '%s' has the OBSOLETE flag set, but it is collected.", st->id);
 737         rrdset_flag_clear(st, RRDSET_FLAG_OBSOLETE);
 738     }
 739
 740     // check if the chart has a long time to be updated
 741     if(unlikely(st->usec_since_last_update > st->entries * update_every_ut)) {
 742         info("%s: took too long to be updated (%0.3Lf secs). Resetting it.", st->name, (long double)(st->usec_since_last_update / 1000000.0));
 743         rrdset_reset(st);
 744         st->usec_since_last_update = update_every_ut;
 745         first_entry = 1;
 746     }
 747
 748     if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 749         debug(D_RRD_STATS, "%s: microseconds since last update: %llu", st->name, st->usec_since_last_update);
 750
 751     // set last_collected_time
 752     if(unlikely(!st->last_collected_time.tv_sec)) {
 753         // it is the first entry
 754         // set the last_collected_time to now
 755         rrdset_init_last_collected_time(st);
 756
 757         last_collect_ut = st->last_collected_time.tv_sec * USEC_PER_SEC + st->last_collected_time.tv_usec - update_every_ut;
 758
 759         // the first entry should not be stored
 760         store_this_entry = 0;
 761         first_entry = 1;
 762
 763         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 764             debug(D_RRD_STATS, "%s: has not set last_collected_time. Setting it now. Will not store the next entry.", st->name);
 765     }
 766     else {
 767         // it is not the first entry
 768         // calculate the proper last_collected_time, using usec_since_last_update
 769         last_collect_ut = rrdset_update_last_collected_time(st);
 770     }
 771
 772     // if this set has not been updated in the past
 773     // we fake the last_update time to be = now - usec_since_last_update
 774     if(unlikely(!st->last_updated.tv_sec)) {
 775         // it has never been updated before
 776         // set a fake last_updated, in the past using usec_since_last_update
 777         rrdset_init_last_updated_time(st);
 778
 779         // the first entry should not be stored
 780         store_this_entry = 0;
 781         first_entry = 1;
 782
 783         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 784             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);
 785     }
 786
 787     // check if we will re-write the entire data set
 788     if(unlikely(dt_usec(&st->last_collected_time, &st->last_updated) > st->entries * update_every_ut)) {
 789         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);
 790         rrdset_reset(st);
 791         rrdset_init_last_updated_time(st);
 792
 793         st->usec_since_last_update = update_every_ut;
 794
 795         // the first entry should not be stored
 796         store_this_entry = 0;
 797         first_entry = 1;
 798     }
 799
 800     // these are the 3 variables that will help us in interpolation
 801     // last_stored_ut = the last time we added a value to the storage
 802     // now_collect_ut = the time the current value has been collected
 803     // next_store_ut  = the time of the next interpolation point
 804     last_stored_ut = st->last_updated.tv_sec * USEC_PER_SEC + st->last_updated.tv_usec;
 805     now_collect_ut = st->last_collected_time.tv_sec * USEC_PER_SEC + st->last_collected_time.tv_usec;
 806     next_store_ut  = (st->last_updated.tv_sec + st->update_every) * USEC_PER_SEC;
 807
 808     if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG))) {
 809         debug(D_RRD_STATS, "%s: last_collect_ut = %0.3Lf (last collection time)", st->name, (long double)last_collect_ut/1000000.0);
 810         debug(D_RRD_STATS, "%s: now_collect_ut  = %0.3Lf (current collection time)", st->name, (long double)now_collect_ut/1000000.0);
 811         debug(D_RRD_STATS, "%s: last_stored_ut  = %0.3Lf (last updated time)", st->name, (long double)last_stored_ut/1000000.0);
 812         debug(D_RRD_STATS, "%s: next_store_ut   = %0.3Lf (next interpolation point)", st->name, (long double)next_store_ut/1000000.0);
 813     }
 814
 815     if(unlikely(!st->counter_done)) {
 816         store_this_entry = 0;
 817         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 818             debug(D_RRD_STATS, "%s: Will not store the next entry.", st->name);
 819     }
 820     st->counter_done++;
 821
 822     if(unlikely(st->rrdhost->rrdpush_enabled))
 823         rrdset_done_push(st);
 824
 825     // calculate totals and count the dimensions
 826     int dimensions = 0;
 827     st->collected_total = 0;
 828     rrddim_foreach_read(rd, st) {
 829         dimensions++;
 830         if(likely(rd->updated))
 831             st->collected_total += rd->collected_value;
 832     }
 833
 834     uint32_t storage_flags = SN_EXISTS;
 835
 836     // process all dimensions to calculate their values
 837     // based on the collected figures only
 838     // at this stage we do not interpolate anything
 839     rrddim_foreach_read(rd, st) {
 840
 841         if(unlikely(!rd->updated)) {
 842             rd->calculated_value = 0;
 843             continue;
 844         }
 845
 846         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 847             debug(D_RRD_STATS, "%s/%s: START "
 848                     " last_collected_value = " COLLECTED_NUMBER_FORMAT
 849                     " collected_value = " COLLECTED_NUMBER_FORMAT
 850                     " last_calculated_value = " CALCULATED_NUMBER_FORMAT
 851                     " calculated_value = " CALCULATED_NUMBER_FORMAT
 852                                       , st->id, rd->name
 853                                       , rd->last_collected_value
 854                                       , rd->collected_value
 855                                       , rd->last_calculated_value
 856                                       , rd->calculated_value
 857             );
 858
 859         switch(rd->algorithm) {
 860             case RRD_ALGORITHM_ABSOLUTE:
 861                 rd->calculated_value = (calculated_number)rd->collected_value
 862                                        * (calculated_number)rd->multiplier
 863                                        / (calculated_number)rd->divisor;
 864
 865                 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 866                     debug(D_RRD_STATS, "%s/%s: CALC ABS/ABS-NO-IN "
 867                             CALCULATED_NUMBER_FORMAT " = "
 868                             COLLECTED_NUMBER_FORMAT
 869                             " * " CALCULATED_NUMBER_FORMAT
 870                             " / " CALCULATED_NUMBER_FORMAT
 871                           , st->id, rd->name
 872                           , rd->calculated_value
 873                           , rd->collected_value
 874                           , (calculated_number)rd->multiplier
 875                           , (calculated_number)rd->divisor
 876                     );
 877                 break;
 878
 879             case RRD_ALGORITHM_PCENT_OVER_ROW_TOTAL:
 880                 if(unlikely(!st->collected_total))
 881                     rd->calculated_value = 0;
 882                 else
 883                     // the percentage of the current value
 884                     // over the total of all dimensions
 885                     rd->calculated_value =
 886                             (calculated_number)100
 887                             * (calculated_number)rd->collected_value
 888                             / (calculated_number)st->collected_total;
 889
 890                 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 891                     debug(D_RRD_STATS, "%s/%s: CALC PCENT-ROW "
 892                             CALCULATED_NUMBER_FORMAT " = 100"
 893                                     " * " COLLECTED_NUMBER_FORMAT
 894                             " / " COLLECTED_NUMBER_FORMAT
 895                           , st->id, rd->name
 896                           , rd->calculated_value
 897                           , rd->collected_value
 898                           , st->collected_total
 899                     );
 900                 break;
 901
 902             case RRD_ALGORITHM_INCREMENTAL:
 903                 if(unlikely(rd->collections_counter <= 1)) {
 904                     rd->calculated_value = 0;
 905                     continue;
 906                 }
 907
 908                 // if the new is smaller than the old (an overflow, or reset), set the old equal to the new
 909                 // to reset the calculation (it will give zero as the calculation for this second)
 910                 if(unlikely(rd->last_collected_value > rd->collected_value)) {
 911                     debug(D_RRD_STATS, "%s.%s: RESET or OVERFLOW. Last collected value = " COLLECTED_NUMBER_FORMAT ", current = " COLLECTED_NUMBER_FORMAT
 912                           , st->name, rd->name
 913                           , rd->last_collected_value
 914                           , rd->collected_value);
 915
 916                     if(!(rrddim_flag_check(rd, RRDDIM_FLAG_DONT_DETECT_RESETS_OR_OVERFLOWS)))
 917                         storage_flags = SN_EXISTS_RESET;
 918
 919                     rd->last_collected_value = rd->collected_value;
 920                 }
 921
 922                 rd->calculated_value +=
 923                         (calculated_number)(rd->collected_value - rd->last_collected_value)
 924                         * (calculated_number)rd->multiplier
 925                         / (calculated_number)rd->divisor;
 926
 927                 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 928                     debug(D_RRD_STATS, "%s/%s: CALC INC PRE "
 929                             CALCULATED_NUMBER_FORMAT " = ("
 930                             COLLECTED_NUMBER_FORMAT " - " COLLECTED_NUMBER_FORMAT
 931                             ")"
 932                                     " * " CALCULATED_NUMBER_FORMAT
 933                             " / " CALCULATED_NUMBER_FORMAT
 934                           , st->id, rd->name
 935                           , rd->calculated_value
 936                           , rd->collected_value, rd->last_collected_value
 937                           , (calculated_number)rd->multiplier
 938                           , (calculated_number)rd->divisor
 939                     );
 940                 break;
 941
 942             case RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL:
 943                 if(unlikely(rd->collections_counter <= 1)) {
 944                     rd->calculated_value = 0;
 945                     continue;
 946                 }
 947
 948                 // if the new is smaller than the old (an overflow, or reset), set the old equal to the new
 949                 // to reset the calculation (it will give zero as the calculation for this second)
 950                 if(unlikely(rd->last_collected_value > rd->collected_value)) {
 951                     debug(D_RRD_STATS, "%s.%s: RESET or OVERFLOW. Last collected value = " COLLECTED_NUMBER_FORMAT ", current = " COLLECTED_NUMBER_FORMAT
 952                           , st->name, rd->name
 953                           , rd->last_collected_value
 954                           , rd->collected_value);
 955
 956                     if(!(rrddim_flag_check(rd, RRDDIM_FLAG_DONT_DETECT_RESETS_OR_OVERFLOWS)))
 957                         storage_flags = SN_EXISTS_RESET;
 958
 959                     rd->last_collected_value = rd->collected_value;
 960                 }
 961
 962                 // the percentage of the current increment
 963                 // over the increment of all dimensions together
 964                 if(unlikely(st->collected_total == st->last_collected_total))
 965                     rd->calculated_value = 0;
 966                 else
 967                     rd->calculated_value =
 968                             (calculated_number)100
 969                             * (calculated_number)(rd->collected_value - rd->last_collected_value)
 970                             / (calculated_number)(st->collected_total - st->last_collected_total);
 971
 972                 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 973                     debug(D_RRD_STATS, "%s/%s: CALC PCENT-DIFF "
 974                             CALCULATED_NUMBER_FORMAT " = 100"
 975                                     " * (" COLLECTED_NUMBER_FORMAT " - " COLLECTED_NUMBER_FORMAT ")"
 976                                     " / (" COLLECTED_NUMBER_FORMAT " - " COLLECTED_NUMBER_FORMAT ")"
 977                           , st->id, rd->name
 978                           , rd->calculated_value
 979                           , rd->collected_value, rd->last_collected_value
 980                           , st->collected_total, st->last_collected_total
 981                     );
 982                 break;
 983
 984             default:
 985                 // make the default zero, to make sure
 986                 // it gets noticed when we add new types
 987                 rd->calculated_value = 0;
 988
 989                 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 990                     debug(D_RRD_STATS, "%s/%s: CALC "
 991                             CALCULATED_NUMBER_FORMAT " = 0"
 992                           , st->id, rd->name
 993                           , rd->calculated_value
 994                     );
 995                 break;
 996         }
 997
 998         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
 999             debug(D_RRD_STATS, "%s/%s: PHASE2 "
1000                     " last_collected_value = " COLLECTED_NUMBER_FORMAT
1001                     " collected_value = " COLLECTED_NUMBER_FORMAT
1002                     " last_calculated_value = " CALCULATED_NUMBER_FORMAT
1003                     " calculated_value = " CALCULATED_NUMBER_FORMAT
1004                                       , st->id, rd->name
1005                                       , rd->last_collected_value
1006                                       , rd->collected_value
1007                                       , rd->last_calculated_value
1008                                       , rd->calculated_value
1009             );
1010
1011     }
1012
1013     // at this point we have all the calculated values ready
1014     // it is now time to interpolate values on a second boundary
1015
1016     if(unlikely(now_collect_ut < next_store_ut)) {
1017         // this is collected in the same interpolation point
1018
1019         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1020             debug(D_RRD_STATS, "%s: THIS IS IN THE SAME INTERPOLATION POINT", st->name);
1021
1022 //#ifdef NETDATA_INTERNAL_CHECKS
1023 //        info("%s is collected in the same interpolation point: short by %llu microseconds", st->name, next_store_ut - now_collect_ut);
1024 //#endif
1025     }
1026
1027     usec_t first_ut = last_stored_ut;
1028     long long iterations = (now_collect_ut - last_stored_ut) / (update_every_ut);
1029     if((now_collect_ut % (update_every_ut)) == 0) iterations++;
1030
1031     for( ; next_store_ut <= now_collect_ut ; last_collect_ut = next_store_ut, next_store_ut += update_every_ut, iterations-- ) {
1032 //#ifdef NETDATA_INTERNAL_CHECKS
1033 //        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); }
1034 //#endif
1035
1036         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG))) {
1037             debug(D_RRD_STATS, "%s: last_stored_ut = %0.3Lf (last updated time)", st->name, (long double)last_stored_ut/1000000.0);
1038             debug(D_RRD_STATS, "%s: next_store_ut  = %0.3Lf (next interpolation point)", st->name, (long double)next_store_ut/1000000.0);
1039         }
1040
1041         st->last_updated.tv_sec = (time_t) (next_store_ut / USEC_PER_SEC);
1042         st->last_updated.tv_usec = 0;
1043
1044         rrddim_foreach_read(rd, st) {
1045             calculated_number new_value;
1046
1047             switch(rd->algorithm) {
1048                 case RRD_ALGORITHM_INCREMENTAL:
1049                     new_value = (calculated_number)
1050                             (      rd->calculated_value
1051                                    * (calculated_number)(next_store_ut - last_collect_ut)
1052                                    / (calculated_number)(now_collect_ut - last_collect_ut)
1053                             );
1054
1055                     if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1056                         debug(D_RRD_STATS, "%s/%s: CALC2 INC "
1057                                 CALCULATED_NUMBER_FORMAT " = "
1058                                 CALCULATED_NUMBER_FORMAT
1059                                 " * %llu"
1060                                         " / %llu"
1061                               , st->id, rd->name
1062                               , new_value
1063                               , rd->calculated_value
1064                               , (next_store_ut - last_stored_ut)
1065                               , (now_collect_ut - last_stored_ut)
1066                         );
1067
1068                     rd->calculated_value -= new_value;
1069                     new_value += rd->last_calculated_value;
1070                     rd->last_calculated_value = 0;
1071                     new_value /= (calculated_number)st->update_every;
1072
1073                     if(unlikely(next_store_ut - last_stored_ut < update_every_ut)) {
1074                         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1075                             debug(D_RRD_STATS, "%s/%s: COLLECTION POINT IS SHORT " CALCULATED_NUMBER_FORMAT " - EXTRAPOLATING",
1076                                     st->id, rd->name
1077                                   , (calculated_number)(next_store_ut - last_stored_ut)
1078                             );
1079                         new_value = new_value * (calculated_number)(st->update_every * 1000000) / (calculated_number)(next_store_ut - last_stored_ut);
1080                     }
1081                     break;
1082
1083                 case RRD_ALGORITHM_ABSOLUTE:
1084                 case RRD_ALGORITHM_PCENT_OVER_ROW_TOTAL:
1085                 case RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL:
1086                 default:
1087                     if(iterations == 1) {
1088                         // this is the last iteration
1089                         // do not interpolate
1090                         // just show the calculated value
1091
1092                         new_value = rd->calculated_value;
1093                     }
1094                     else {
1095                         // we have missed an update
1096                         // interpolate in the middle values
1097
1098                         new_value = (calculated_number)
1099                                 (   (     (rd->calculated_value - rd->last_calculated_value)
1100                                           * (calculated_number)(next_store_ut - last_collect_ut)
1101                                           / (calculated_number)(now_collect_ut - last_collect_ut)
1102                                     )
1103                                     +  rd->last_calculated_value
1104                                 );
1105
1106                         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1107                             debug(D_RRD_STATS, "%s/%s: CALC2 DEF "
1108                                     CALCULATED_NUMBER_FORMAT " = ((("
1109                                             "(" CALCULATED_NUMBER_FORMAT " - " CALCULATED_NUMBER_FORMAT ")"
1110                                             " * %llu"
1111                                             " / %llu) + " CALCULATED_NUMBER_FORMAT
1112                                   , st->id, rd->name
1113                                   , new_value
1114                                   , rd->calculated_value, rd->last_calculated_value
1115                                   , (next_store_ut - first_ut)
1116                                   , (now_collect_ut - first_ut), rd->last_calculated_value
1117                             );
1118                     }
1119                     break;
1120             }
1121
1122             if(unlikely(!store_this_entry)) {
1123                 rd->values[st->current_entry] = pack_storage_number(0, SN_NOT_EXISTS);
1124                 continue;
1125             }
1126
1127             if(likely(rd->updated && rd->collections_counter > 1 && iterations < st->gap_when_lost_iterations_above)) {
1128                 rd->values[st->current_entry] = pack_storage_number(new_value, storage_flags );
1129                 rd->last_stored_value = new_value;
1130
1131                 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1132                     debug(D_RRD_STATS, "%s/%s: STORE[%ld] "
1133                             CALCULATED_NUMBER_FORMAT " = " CALCULATED_NUMBER_FORMAT
1134                           , st->id, rd->name
1135                           , st->current_entry
1136                           , unpack_storage_number(rd->values[st->current_entry]), new_value
1137                     );
1138             }
1139             else {
1140                 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1141                     debug(D_RRD_STATS, "%s/%s: STORE[%ld] = NON EXISTING "
1142                           , st->id, rd->name
1143                           , st->current_entry
1144                     );
1145                 rd->values[st->current_entry] = pack_storage_number(0, SN_NOT_EXISTS);
1146                 rd->last_stored_value = NAN;
1147             }
1148
1149             stored_entries++;
1150
1151             if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG))) {
1152                 calculated_number t1 = new_value * (calculated_number)rd->multiplier / (calculated_number)rd->divisor;
1153                 calculated_number t2 = unpack_storage_number(rd->values[st->current_entry]);
1154                 calculated_number accuracy = accuracy_loss(t1, t2);
1155                 debug(D_RRD_STATS, "%s/%s: UNPACK[%ld] = " CALCULATED_NUMBER_FORMAT " FLAGS=0x%08x (original = " CALCULATED_NUMBER_FORMAT ", accuracy loss = " CALCULATED_NUMBER_FORMAT "%%%s)"
1156                       , st->id, rd->name
1157                       , st->current_entry
1158                       , t2
1159                       , get_storage_number_flags(rd->values[st->current_entry])
1160                       , t1
1161                       , accuracy
1162                       , (accuracy > ACCURACY_LOSS) ? " **TOO BIG** " : ""
1163                 );
1164
1165                 rd->collected_volume += t1;
1166                 rd->stored_volume += t2;
1167                 accuracy = accuracy_loss(rd->collected_volume, rd->stored_volume);
1168                 debug(D_RRD_STATS, "%s/%s: VOLUME[%ld] = " CALCULATED_NUMBER_FORMAT ", calculated  = " CALCULATED_NUMBER_FORMAT ", accuracy loss = " CALCULATED_NUMBER_FORMAT "%%%s"
1169                       , st->id, rd->name
1170                       , st->current_entry
1171                       , rd->stored_volume
1172                       , rd->collected_volume
1173                       , accuracy
1174                       , (accuracy > ACCURACY_LOSS) ? " **TOO BIG** " : ""
1175                 );
1176
1177             }
1178         }
1179         // reset the storage flags for the next point, if any;
1180         storage_flags = SN_EXISTS;
1181
1182         st->counter++;
1183         st->current_entry = ((st->current_entry + 1) >= st->entries) ? 0 : st->current_entry + 1;
1184         last_stored_ut = next_store_ut;
1185     }
1186
1187     st->last_collected_total  = st->collected_total;
1188
1189     rrddim_foreach_read(rd, st) {
1190         if(unlikely(!rd->updated))
1191             continue;
1192
1193         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1194             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);
1195
1196         rd->last_collected_value = rd->collected_value;
1197
1198         switch(rd->algorithm) {
1199             case RRD_ALGORITHM_INCREMENTAL:
1200                 if(unlikely(!first_entry)) {
1201                     if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1202                         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);
1203                     rd->last_calculated_value += rd->calculated_value;
1204                 }
1205                 else {
1206                     if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1207                         debug(D_RRD_STATS, "%s: THIS IS THE FIRST POINT", st->name);
1208                 }
1209                 break;
1210
1211             case RRD_ALGORITHM_ABSOLUTE:
1212             case RRD_ALGORITHM_PCENT_OVER_ROW_TOTAL:
1213             case RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL:
1214                 if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1215                     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);
1216                 rd->last_calculated_value = rd->calculated_value;
1217                 break;
1218         }
1219
1220         rd->calculated_value = 0;
1221         rd->collected_value = 0;
1222         rd->updated = 0;
1223
1224         if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
1225             debug(D_RRD_STATS, "%s/%s: END "
1226                     " last_collected_value = " COLLECTED_NUMBER_FORMAT
1227                     " collected_value = " COLLECTED_NUMBER_FORMAT
1228                     " last_calculated_value = " CALCULATED_NUMBER_FORMAT
1229                     " calculated_value = " CALCULATED_NUMBER_FORMAT
1230                                       , st->id, rd->name
1231                                       , rd->last_collected_value
1232                                       , rd->collected_value
1233                                       , rd->last_calculated_value
1234                                       , rd->calculated_value
1235             );
1236     }
1237
1238     // ALL DONE ABOUT THE DATA UPDATE
1239     // --------------------------------------------------------------------
1240
1241 /*
1242     // find if there are any obsolete dimensions (not updated recently)
1243     if(unlikely(rrd_delete_unupdated_dimensions)) {
1244
1245         for( rd = st->dimensions; likely(rd) ; rd = rd->next )
1246             if((rd->last_collected_time.tv_sec + (rrd_delete_unupdated_dimensions * st->update_every)) < st->last_collected_time.tv_sec)
1247                 break;
1248
1249         if(unlikely(rd)) {
1250             RRDDIM *last;
1251             // there is dimension to free
1252             // upgrade our read lock to a write lock
1253             pthread_rwlock_unlock(&st->rrdset_rwlock);
1254             pthread_rwlock_wrlock(&st->rrdset_rwlock);
1255
1256             for( rd = st->dimensions, last = NULL ; likely(rd) ; ) {
1257                 // remove it only it is not updated in rrd_delete_unupdated_dimensions seconds
1258
1259                 if(unlikely((rd->last_collected_time.tv_sec + (rrd_delete_unupdated_dimensions * st->update_every)) < st->last_collected_time.tv_sec)) {
1260                     info("Removing obsolete dimension '%s' (%s) of '%s' (%s).", rd->name, rd->id, st->name, st->id);
1261
1262                     if(unlikely(!last)) {
1263                         st->dimensions = rd->next;
1264                         rd->next = NULL;
1265                         rrddim_free(st, rd);
1266                         rd = st->dimensions;
1267                         continue;
1268                     }
1269                     else {
1270                         last->next = rd->next;
1271                         rd->next = NULL;
1272                         rrddim_free(st, rd);
1273                         rd = last->next;
1274                         continue;
1275                     }
1276                 }
1277
1278                 last = rd;
1279                 rd = rd->next;
1280             }
1281
1282             if(unlikely(!st->dimensions)) {
1283                 info("Disabling chart %s (%s) since it does not have any dimensions", st->name, st->id);
1284                 st->enabled = 0;
1285             }
1286         }
1287     }
1288 */
1289
1290     rrdset_unlock(st);
1291
1292     if(unlikely(pthread_setcancelstate(pthreadoldcancelstate, NULL) != 0))
1293         error("Cannot set pthread cancel state to RESTORE (%d).", pthreadoldcancelstate);
1294 }