src/plugin_tc.c

   1 #ifdef HAVE_CONFIG_H
   2 #include <config.h>
   3 #endif
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <string.h>
   7 #include <sys/types.h>
   8 #include <sys/resource.h>
   9
  10 #include "avl.h"
  11 #include "log.h"
  12 #include "common.h"
  13 #include "appconfig.h"
  14 #include "rrd.h"
  15 #include "popen.h"
  16 #include "plugin_tc.h"
  17 #include "main.h"
  18
  19 #define RRD_TYPE_TC                                     "tc"
  20 #define RRD_TYPE_TC_LEN                         strlen(RRD_TYPE_TC)
  21
  22 // ----------------------------------------------------------------------------
  23 // /sbin/tc processor
  24 // this requires the script plugins.d/tc-qos-helper.sh
  25
  26 #define TC_LINE_MAX 1024
  27
  28 struct tc_class {
  29         avl avl;
  30
  31         char *id;
  32         uint32_t hash;
  33
  34         char *name;
  35
  36         char *leafid;
  37         uint32_t leaf_hash;
  38
  39         char *parentid;
  40         uint32_t parent_hash;
  41
  42         char hasparent;
  43         char isleaf;
  44         unsigned long long bytes;
  45
  46         char updated;   // updated bytes
  47         char seen;              // seen in the tc list (even without bytes)
  48
  49         struct tc_class *next;
  50         struct tc_class *prev;
  51 };
  52
  53 struct tc_device {
  54         avl avl;
  55
  56         char *id;
  57         uint32_t hash;
  58
  59         char *name;
  60         char *family;
  61
  62         avl_tree classes_index;
  63
  64         struct tc_class *classes;
  65
  66         struct tc_device *next;
  67         struct tc_device *prev;
  68 };
  69
  70
  71 struct tc_device *tc_device_root = NULL;
  72
  73 // ----------------------------------------------------------------------------
  74 // tc_device index
  75
  76 static int tc_device_iterator(avl *a) { if(a) {}; return 0; }
  77
  78 static int tc_device_compare(void* a, void* b) {
  79         if(((struct tc_device *)a)->hash < ((struct tc_device *)b)->hash) return -1;
  80         else if(((struct tc_device *)a)->hash > ((struct tc_device *)b)->hash) return 1;
  81         else return strcmp(((struct tc_device *)a)->id, ((struct tc_device *)b)->id);
  82 }
  83
  84 avl_tree tc_device_root_index = {
  85                 NULL,
  86                 tc_device_compare,
  87                 PTHREAD_RWLOCK_INITIALIZER
  88 };
  89
  90 #define tc_device_index_add(st) avl_insert(&tc_device_root_index, (avl *)(st))
  91 #define tc_device_index_del(st) avl_remove(&tc_device_root_index, (avl *)(st))
  92
  93 static struct tc_device *tc_device_index_find(const char *id, uint32_t hash) {
  94         struct tc_device *result = NULL, tmp;
  95         tmp.id = (char *)id;
  96         tmp.hash = (hash)?hash:simple_hash(tmp.id);
  97
  98         avl_search(&(tc_device_root_index), (avl *)&tmp, tc_device_iterator, (avl **)&result);
  99         return result;
 100 }
 101
 102
 103 // ----------------------------------------------------------------------------
 104 // tc_class index
 105
 106 static int tc_class_iterator(avl *a) { if(a) {}; return 0; }
 107
 108 static int tc_class_compare(void* a, void* b) {
 109         if(((struct tc_class *)a)->hash < ((struct tc_class *)b)->hash) return -1;
 110         else if(((struct tc_class *)a)->hash > ((struct tc_class *)b)->hash) return 1;
 111         else return strcmp(((struct tc_class *)a)->id, ((struct tc_class *)b)->id);
 112 }
 113
 114 #define tc_class_index_add(st, rd) avl_insert(&((st)->classes_index), (avl *)(rd))
 115 #define tc_class_index_del(st, rd) avl_remove(&((st)->classes_index), (avl *)(rd))
 116
 117 static struct tc_class *tc_class_index_find(struct tc_device *st, const char *id, uint32_t hash) {
 118         struct tc_class *result = NULL, tmp;
 119         tmp.id = (char *)id;
 120         tmp.hash = (hash)?hash:simple_hash(tmp.id);
 121
 122         avl_search(&(st->classes_index), (avl *)&tmp, tc_class_iterator, (avl **)&result);
 123         return result;
 124 }
 125
 126 // ----------------------------------------------------------------------------
 127
 128 static void tc_class_free(struct tc_device *n, struct tc_class *c) {
 129         debug(D_TC_LOOP, "Removing from device '%s' class '%s', parentid '%s', leafid '%s', seen=%d", n->id, c->id, c->parentid?c->parentid:"", c->leafid?c->leafid:"", c->seen);
 130
 131         if(c->next) c->next->prev = c->prev;
 132         if(c->prev) c->prev->next = c->next;
 133         if(n->classes == c) {
 134                 if(c->next) n->classes = c->next;
 135                 else n->classes = c->prev;
 136         }
 137
 138         tc_class_index_del(n, c);
 139
 140         if(c->id) free(c->id);
 141         if(c->name) free(c->name);
 142         if(c->leafid) free(c->leafid);
 143         if(c->parentid) free(c->parentid);
 144
 145         free(c);
 146 }
 147
 148 static void tc_device_classes_cleanup(struct tc_device *d) {
 149         static int cleanup_every = 999;
 150
 151         if(cleanup_every > 0) {
 152                 cleanup_every = -config_get_number("plugin:tc", "cleanup unused classes every", 60);
 153                 if(cleanup_every > 0) cleanup_every = -cleanup_every;
 154                 if(cleanup_every == 0) cleanup_every = -1;
 155         }
 156
 157         struct tc_class *c = d->classes;
 158         while(c) {
 159                 if(c->seen < cleanup_every) {
 160                         struct tc_class *nc = c->next;
 161                         tc_class_free(d, c);
 162                         c = nc;
 163                 }
 164                 else c = c->next;
 165
 166                 if(c) {
 167                         c->updated = 0;
 168                         c->seen--;
 169                 }
 170         }
 171 }
 172
 173 static void tc_device_commit(struct tc_device *d)
 174 {
 175         static int enable_new_interfaces = -1;
 176
 177         if(enable_new_interfaces == -1) enable_new_interfaces = config_get_boolean("plugin:tc", "enable new interfaces detected at runtime", 1);
 178
 179         // we only need to add leaf classes
 180         struct tc_class *c, *x;
 181
 182         // set all classes
 183         for(c = d->classes ; c ; c = c->next) {
 184                 c->isleaf = 1;
 185                 c->hasparent = 0;
 186         }
 187
 188         // mark the classes as leafs and parents
 189         for(c = d->classes ; c ; c = c->next) {
 190                 if(!c->updated) continue;
 191
 192                 for(x = d->classes ; x ; x = x->next) {
 193                         if(!x->updated) continue;
 194
 195                         if(c == x) continue;
 196
 197                         if(x->parentid && (
 198                                 (               c->hash      == x->parent_hash && strcmp(c->id,     x->parentid) == 0) ||
 199                                 (c->leafid   && c->leaf_hash == x->parent_hash && strcmp(c->leafid, x->parentid) == 0))) {
 200                                 // debug(D_TC_LOOP, "TC: In device '%s', class '%s' (leafid: '%s') has as leaf class '%s' (parentid: '%s').", d->name?d->name:d->id, c->name?c->name:c->id, c->leafid?c->leafid:c->id, x->name?x->name:x->id, x->parentid?x->parentid:x->id);
 201                                 c->isleaf = 0;
 202                                 x->hasparent = 1;
 203                         }
 204                 }
 205         }
 206
 207         // debugging:
 208         /*
 209         for ( c = d->classes ; c ; c = c->next) {
 210                 if(c->isleaf && c->hasparent) debug(D_TC_LOOP, "TC: Device %s, class %s, OK", d->name, c->id);
 211                 else debug(D_TC_LOOP, "TC: Device %s, class %s, IGNORE (isleaf: %d, hasparent: %d, parent: %s)", d->name, c->id, c->isleaf, c->hasparent, c->parentid);
 212         }
 213         */
 214
 215         // we need at least a class
 216         for(c = d->classes ; c ; c = c->next) {
 217                 // debug(D_TC_LOOP, "TC: Device '%s', class '%s', isLeaf=%d, HasParent=%d, Seen=%d", d->name?d->name:d->id, c->name?c->name:c->id, c->isleaf, c->hasparent, c->seen);
 218                 if(!c->updated) continue;
 219                 if(c->isleaf && c->hasparent) break;
 220         }
 221         if(!c) {
 222                 debug(D_TC_LOOP, "TC: Ignoring TC device '%s'. No leaf classes.", d->name?d->name:d->id);
 223                 tc_device_classes_cleanup(d);
 224                 return;
 225         }
 226
 227         char var_name[CONFIG_MAX_NAME + 1];
 228         snprintf(var_name, CONFIG_MAX_NAME, "qos for %s", d->id);
 229         if(config_get_boolean("plugin:tc", var_name, enable_new_interfaces)) {
 230                 RRDSET *st = rrdset_find_bytype(RRD_TYPE_TC, d->id);
 231                 if(!st) {
 232                         debug(D_TC_LOOP, "TC: Creating new chart for device '%s'", d->name?d->name:d->id);
 233
 234                         st = rrdset_create(RRD_TYPE_TC, d->id, d->name?d->name:d->id, d->family?d->family:d->id, "Class Usage", "kilobits/s", 1000, rrd_update_every, RRDSET_TYPE_STACKED);
 235
 236                         for(c = d->classes ; c ; c = c->next) {
 237                                 if(!c->updated) continue;
 238
 239                                 if(c->isleaf && c->hasparent)
 240                                         rrddim_add(st, c->id, c->name?c->name:c->id, 8, 1024, RRDDIM_INCREMENTAL);
 241                         }
 242                 }
 243                 else {
 244                         debug(D_TC_LOOP, "TC: Updating chart for device '%s'", d->name?d->name:d->id);
 245                         rrdset_next_plugins(st);
 246
 247                         if(d->name && strcmp(d->id, d->name) != 0) rrdset_set_name(st, d->name);
 248                 }
 249
 250                 for(c = d->classes ; c ; c = c->next) {
 251                         if(!c->updated) continue;
 252
 253                         if(c->isleaf && c->hasparent) {
 254                                 RRDDIM *rd = rrddim_find(st, c->id);
 255
 256                                 if(!rd) {
 257                                         debug(D_TC_LOOP, "TC: Adding to chart '%s', dimension '%s'", st->id, c->id, c->name);
 258
 259                                         // new class, we have to add it
 260                                         rd = rrddim_add(st, c->id, c->name?c->name:c->id, 8, 1024, RRDDIM_INCREMENTAL);
 261                                 }
 262                                 else debug(D_TC_LOOP, "TC: Updating chart '%s', dimension '%s'", st->id, c->id);
 263
 264                                 rrddim_set_by_pointer(st, rd, c->bytes);
 265
 266                                 // if it has a name, different to the id
 267                                 if(c->name) {
 268                                         // update the rrd dimension with the new name
 269                                         debug(D_TC_LOOP, "TC: Setting chart '%s', dimension '%s' name to '%s'", st->id, rd->id, c->name);
 270                                         rrddim_set_name(st, rd, c->name);
 271
 272                                         free(c->name);
 273                                         c->name = NULL;
 274                                 }
 275                         }
 276                 }
 277                 rrdset_done(st);
 278         }
 279
 280         tc_device_classes_cleanup(d);
 281 }
 282
 283 static void tc_device_set_class_name(struct tc_device *d, char *id, char *name)
 284 {
 285         struct tc_class *c = tc_class_index_find(d, id, 0);
 286         if(c) {
 287                 if(c->name) free(c->name);
 288                 c->name = NULL;
 289
 290                 if(name && *name && strcmp(c->id, name) != 0) {
 291                         debug(D_TC_LOOP, "TC: Setting device '%s', class '%s' name to '%s'", d->id, id, name);
 292                         c->name = strdup(name);
 293                 }
 294         }
 295 }
 296
 297 static void tc_device_set_device_name(struct tc_device *d, char *name) {
 298         if(d->name) free(d->name);
 299         d->name = NULL;
 300
 301         if(name && *name && strcmp(d->id, name) != 0) {
 302                 debug(D_TC_LOOP, "TC: Setting device '%s' name to '%s'", d->id, name);
 303                 d->name = strdup(name);
 304         }
 305 }
 306
 307 static void tc_device_set_device_family(struct tc_device *d, char *family) {
 308         if(d->family) free(d->family);
 309         d->family = NULL;
 310
 311         if(family && *family && strcmp(d->id, family) != 0) {
 312                 debug(D_TC_LOOP, "TC: Setting device '%s' family to '%s'", d->id, family);
 313                 d->family = strdup(family);
 314         }
 315         // no need for null termination - it is already null
 316 }
 317
 318 static struct tc_device *tc_device_create(char *id)
 319 {
 320         struct tc_device *d = tc_device_index_find(id, 0);
 321
 322         if(!d) {
 323                 debug(D_TC_LOOP, "TC: Creating device '%s'", id);
 324
 325                 d = calloc(1, sizeof(struct tc_device));
 326                 if(!d) {
 327                         fatal("Cannot allocate memory for tc_device %s", id);
 328                         return NULL;
 329                 }
 330
 331                 d->id = strdup(id);
 332                 d->hash = simple_hash(d->id);
 333
 334                 d->classes_index.root = NULL;
 335                 d->classes_index.compar = tc_class_compare;
 336                 pthread_rwlock_init(&d->classes_index.rwlock, NULL);
 337
 338                 tc_device_index_add(d);
 339
 340                 if(!tc_device_root) {
 341                         tc_device_root = d;
 342                 }
 343                 else {
 344                         d->next = tc_device_root;
 345                         tc_device_root->prev = d;
 346                         tc_device_root = d;
 347                 }
 348         }
 349
 350         return(d);
 351 }
 352
 353 static struct tc_class *tc_class_add(struct tc_device *n, char *id, char *parentid, char *leafid)
 354 {
 355         struct tc_class *c = tc_class_index_find(n, id, 0);
 356
 357         if(!c) {
 358                 debug(D_TC_LOOP, "TC: Creating in device '%s', class id '%s', parentid '%s', leafid '%s'", n->id, id, parentid?parentid:"", leafid?leafid:"");
 359
 360                 c = calloc(1, sizeof(struct tc_class));
 361                 if(!c) {
 362                         fatal("Cannot allocate memory for tc class");
 363                         return NULL;
 364                 }
 365
 366                 if(n->classes) n->classes->prev = c;
 367                 c->next = n->classes;
 368                 n->classes = c;
 369
 370                 c->id = strdup(id);
 371                 if(!c->id) {
 372                         free(c);
 373                         return NULL;
 374                 }
 375                 c->hash = simple_hash(c->id);
 376
 377                 if(parentid && *parentid) {
 378                         c->parentid = strdup(parentid);
 379                         c->parent_hash = simple_hash(c->parentid);
 380                 }
 381
 382                 if(leafid && *leafid) {
 383                         c->leafid = strdup(leafid);
 384                         c->leaf_hash = simple_hash(c->leafid);
 385                 }
 386
 387                 tc_class_index_add(n, c);
 388         }
 389
 390         c->seen = 1;
 391
 392         return(c);
 393 }
 394
 395 static void tc_device_free(struct tc_device *n)
 396 {
 397         if(n->next) n->next->prev = n->prev;
 398         if(n->prev) n->prev->next = n->next;
 399         if(tc_device_root == n) {
 400                 if(n->next) tc_device_root = n->next;
 401                 else tc_device_root = n->prev;
 402         }
 403
 404         tc_device_index_del(n);
 405
 406         while(n->classes) tc_class_free(n, n->classes);
 407
 408         if(n->id) free(n->id);
 409         if(n->name) free(n->name);
 410         if(n->family) free(n->family);
 411
 412         free(n);
 413 }
 414
 415 static void tc_device_free_all()
 416 {
 417         while(tc_device_root)
 418                 tc_device_free(tc_device_root);
 419 }
 420
 421 #define MAX_WORDS 20
 422
 423 static inline int tc_space(char c) {
 424         switch(c) {
 425         case ' ':
 426         case '\t':
 427         case '\r':
 428         case '\n':
 429                 return 1;
 430
 431         default:
 432                 return 0;
 433         }
 434 }
 435
 436 static void tc_split_words(char *str, char **words, int max_words) {
 437         char *s = str;
 438         int i = 0;
 439
 440         // skip all white space
 441         while(tc_space(*s)) s++;
 442
 443         // store the first word
 444         words[i++] = s;
 445
 446         // while we have something
 447         while(*s) {
 448                 // if it is a space
 449                 if(tc_space(*s)) {
 450
 451                         // terminate the word
 452                         *s++ = '\0';
 453
 454                         // skip all white space
 455                         while(tc_space(*s)) s++;
 456
 457                         // if we reached the end, stop
 458                         if(!*s) break;
 459
 460                         // store the next word
 461                         if(i < max_words) words[i++] = s;
 462                         else break;
 463                 }
 464                 else s++;
 465         }
 466
 467         // terminate the words
 468         while(i < max_words) words[i++] = NULL;
 469 }
 470
 471 pid_t tc_child_pid = 0;
 472 void *tc_main(void *ptr)
 473 {
 474         if(ptr) { ; }
 475
 476         info("TC thread created with task id %d", gettid());
 477
 478         if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
 479                 error("Cannot set pthread cancel type to DEFERRED.");
 480
 481         if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
 482                 error("Cannot set pthread cancel state to ENABLE.");
 483
 484         struct rusage thread;
 485         RRDSET *stcpu = NULL, *sttime = NULL;
 486
 487         char buffer[TC_LINE_MAX+1] = "";
 488         char *words[MAX_WORDS] = { NULL };
 489
 490         uint32_t BEGIN_HASH = simple_hash("BEGIN");
 491         uint32_t END_HASH = simple_hash("END");
 492         uint32_t CLASS_HASH = simple_hash("class");
 493         uint32_t SENT_HASH = simple_hash("Sent");
 494         uint32_t SETDEVICENAME_HASH = simple_hash("SETDEVICENAME");
 495         uint32_t SETDEVICEGROUP_HASH = simple_hash("SETDEVICEGROUP");
 496         uint32_t SETCLASSNAME_HASH = simple_hash("SETCLASSNAME");
 497         uint32_t WORKTIME_HASH = simple_hash("WORKTIME");
 498 #ifdef DETACH_PLUGINS_FROM_NETDATA
 499         uint32_t MYPID_HASH = simple_hash("MYPID");
 500 #endif
 501         uint32_t first_hash;
 502
 503         for(;1;) {
 504                 FILE *fp;
 505                 struct tc_device *device = NULL;
 506                 struct tc_class *class = NULL;
 507
 508                 snprintf(buffer, TC_LINE_MAX, "exec %s %d", config_get("plugin:tc", "script to run to get tc values", PLUGINS_DIR "/tc-qos-helper.sh"), rrd_update_every);
 509                 debug(D_TC_LOOP, "executing '%s'", buffer);
 510                 // fp = popen(buffer, "r");
 511                 fp = mypopen(buffer, &tc_child_pid);
 512                 if(!fp) {
 513                         error("TC: Cannot popen(\"%s\", \"r\").", buffer);
 514                         return NULL;
 515                 }
 516
 517                 while(fgets(buffer, TC_LINE_MAX, fp) != NULL) {
 518                         if(netdata_exit) break;
 519
 520                         buffer[TC_LINE_MAX] = '\0';
 521                         // debug(D_TC_LOOP, "TC: read '%s'", buffer);
 522
 523                         tc_split_words(buffer, words, MAX_WORDS);
 524                         if(!words[0] || !*words[0]) {
 525                                 // debug(D_TC_LOOP, "empty line");
 526                                 continue;
 527                         }
 528                         // else debug(D_TC_LOOP, "First word is '%s'", words[0]);
 529
 530                         first_hash = simple_hash(words[0]);
 531
 532                         if(first_hash == CLASS_HASH && strcmp(words[0], "class") == 0 && device) {
 533                                 // debug(D_TC_LOOP, "CLASS line on class id='%s', parent='%s', parentid='%s', leaf='%s', leafid='%s'", words[2], words[3], words[4], words[5], words[6]);
 534
 535                                 if(words[1] && words[2] && words[3] && words[4] && (strcmp(words[3], "parent") == 0 || strcmp(words[3], "root") == 0)) {
 536                                         // char *type     = words[1];  // the class: htb, fq_codel, etc
 537                                         char *id       = words[2];      // the class major:minor
 538                                         char *parent   = words[3];      // 'parent' or 'root'
 539                                         char *parentid = words[4];      // the parent's id
 540                                         char *leaf     = words[5];      // 'leaf'
 541                                         char *leafid   = words[6];      // leafid
 542
 543                                         if(strcmp(parent, "root") == 0) {
 544                                                 parentid = NULL;
 545                                                 leafid = NULL;
 546                                         }
 547                                         else if(!leaf || strcmp(leaf, "leaf") != 0)
 548                                                 leafid = NULL;
 549
 550                                         char leafbuf[20 + 1] = "";
 551                                         if(leafid && leafid[strlen(leafid) - 1] == ':') {
 552                                                 strncpy(leafbuf, leafid, 20 - 1);
 553                                                 strcat(leafbuf, "1");
 554                                                 leafid = leafbuf;
 555                                         }
 556
 557                                         class = tc_class_add(device, id, parentid, leafid);
 558                                 }
 559                         }
 560                         else if(first_hash == END_HASH && strcmp(words[0], "END") == 0) {
 561                                 // debug(D_TC_LOOP, "END line");
 562
 563                                 if(device) {
 564                                         if(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL) != 0)
 565                                                 error("Cannot set pthread cancel state to DISABLE.");
 566
 567                                         tc_device_commit(device);
 568                                         // tc_device_free(device);
 569                                         device = NULL;
 570                                         class = NULL;
 571
 572                                         if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
 573                                                 error("Cannot set pthread cancel state to ENABLE.");
 574                                 }
 575                         }
 576                         else if(first_hash == BEGIN_HASH && strcmp(words[0], "BEGIN") == 0) {
 577                                 // debug(D_TC_LOOP, "BEGIN line on device '%s'", words[1]);
 578
 579                                 if(device) {
 580                                         // tc_device_free(device);
 581                                         device = NULL;
 582                                         class = NULL;
 583                                 }
 584
 585                                 if(words[1] && *words[1]) {
 586                                         device = tc_device_create(words[1]);
 587                                         class = NULL;
 588                                 }
 589                         }
 590                         else if(first_hash == SENT_HASH && strcmp(words[0], "Sent") == 0 && device && class) {
 591                                 // debug(D_TC_LOOP, "SENT line '%s'", words[1]);
 592                                 if(words[1] && *words[1]) {
 593                                         class->bytes = atoll(words[1]);
 594                                         class->updated = 1;
 595                                 }
 596                                 else class->bytes = 0;
 597                         }
 598                         else if(first_hash == SETDEVICENAME_HASH && strcmp(words[0], "SETDEVICENAME") == 0 && device) {
 599                                 // debug(D_TC_LOOP, "SETDEVICENAME line '%s'", words[1]);
 600                                 if(words[1] && *words[1]) tc_device_set_device_name(device, words[1]);
 601                         }
 602                         else if(first_hash == SETDEVICEGROUP_HASH && strcmp(words[0], "SETDEVICEGROUP") == 0 && device) {
 603                                 // debug(D_TC_LOOP, "SETDEVICEGROUP line '%s'", words[1]);
 604                                 if(words[1] && *words[1]) tc_device_set_device_family(device, words[1]);
 605                         }
 606                         else if(first_hash == SETCLASSNAME_HASH && strcmp(words[0], "SETCLASSNAME") == 0 && device) {
 607                                 // debug(D_TC_LOOP, "SETCLASSNAME line '%s' '%s'", words[1], words[2]);
 608                                 char *id    = words[1];
 609                                 char *path  = words[2];
 610                                 if(id && *id && path && *path) tc_device_set_class_name(device, id, path);
 611                         }
 612                         else if(first_hash == WORKTIME_HASH && strcmp(words[0], "WORKTIME") == 0) {
 613                                 // debug(D_TC_LOOP, "WORKTIME line '%s' '%s'", words[1], words[2]);
 614                                 getrusage(RUSAGE_THREAD, &thread);
 615
 616                                 if(!stcpu) stcpu = rrdset_find("netdata.plugin_tc_cpu");
 617                                 if(!stcpu) {
 618                                         stcpu = rrdset_create("netdata", "plugin_tc_cpu", NULL, "netdata", "NetData TC CPU usage", "milliseconds/s", 10000, rrd_update_every, RRDSET_TYPE_STACKED);
 619                                         rrddim_add(stcpu, "user",  NULL,  1, 1000, RRDDIM_INCREMENTAL);
 620                                         rrddim_add(stcpu, "system", NULL, 1, 1000, RRDDIM_INCREMENTAL);
 621                                 }
 622                                 else rrdset_next(stcpu);
 623
 624                                 rrddim_set(stcpu, "user"  , thread.ru_utime.tv_sec * 1000000ULL + thread.ru_utime.tv_usec);
 625                                 rrddim_set(stcpu, "system", thread.ru_stime.tv_sec * 1000000ULL + thread.ru_stime.tv_usec);
 626                                 rrdset_done(stcpu);
 627
 628                                 if(!sttime) stcpu = rrdset_find("netdata.plugin_tc_time");
 629                                 if(!sttime) {
 630                                         sttime = rrdset_create("netdata", "plugin_tc_time", NULL, "netdata", "NetData TC script execution", "milliseconds/run", 10001, rrd_update_every, RRDSET_TYPE_AREA);
 631                                         rrddim_add(sttime, "run_time",  "run time",  1, 1, RRDDIM_ABSOLUTE);
 632                                 }
 633                                 else rrdset_next(sttime);
 634
 635                                 rrddim_set(sttime, "run_time", atoll(words[1]));
 636                                 rrdset_done(sttime);
 637
 638                         }
 639 #ifdef DETACH_PLUGINS_FROM_NETDATA
 640                         else if(first_hash == MYPID_HASH && (strcmp(words[0], "MYPID") == 0)) {
 641                                 // debug(D_TC_LOOP, "MYPID line '%s'", words[1]);
 642                                 char *id = words[1];
 643                                 pid_t pid = atol(id);
 644
 645                                 if(pid) tc_child_pid = pid;
 646
 647                                 debug(D_TC_LOOP, "TC: Child PID is %d.", tc_child_pid);
 648                         }
 649 #endif
 650                         //else {
 651                         //      debug(D_TC_LOOP, "IGNORED line");
 652                         //}
 653                 }
 654                 mypclose(fp, tc_child_pid);
 655                 tc_child_pid = 0;
 656
 657                 if(device) {
 658                         // tc_device_free(device);
 659                         device = NULL;
 660                         class = NULL;
 661                 }
 662
 663                 if(netdata_exit) {
 664                         tc_device_free_all();
 665                         return NULL;
 666                 }
 667
 668                 sleep(rrd_update_every);
 669         }
 670
 671         return NULL;
 672 }
 673