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 #ifdef AVL_LOCK_WITH_MUTEX
  88                 PTHREAD_MUTEX_INITIALIZER
  89 #else
  90                 PTHREAD_RWLOCK_INITIALIZER
  91 #endif
  92 };
  93
  94 #define tc_device_index_add(st) avl_insert(&tc_device_root_index, (avl *)(st))
  95 #define tc_device_index_del(st) avl_remove(&tc_device_root_index, (avl *)(st))
  96
  97 static struct tc_device *tc_device_index_find(const char *id, uint32_t hash) {
  98         struct tc_device *result = NULL, tmp;
  99         tmp.id = (char *)id;
 100         tmp.hash = (hash)?hash:simple_hash(tmp.id);
 101
 102         avl_search(&(tc_device_root_index), (avl *)&tmp, tc_device_iterator, (avl **)&result);
 103         return result;
 104 }
 105
 106
 107 // ----------------------------------------------------------------------------
 108 // tc_class index
 109
 110 static int tc_class_iterator(avl *a) { if(a) {}; return 0; }
 111
 112 static int tc_class_compare(void* a, void* b) {
 113         if(((struct tc_class *)a)->hash < ((struct tc_class *)b)->hash) return -1;
 114         else if(((struct tc_class *)a)->hash > ((struct tc_class *)b)->hash) return 1;
 115         else return strcmp(((struct tc_class *)a)->id, ((struct tc_class *)b)->id);
 116 }
 117
 118 #define tc_class_index_add(st, rd) avl_insert(&((st)->classes_index), (avl *)(rd))
 119 #define tc_class_index_del(st, rd) avl_remove(&((st)->classes_index), (avl *)(rd))
 120
 121 static struct tc_class *tc_class_index_find(struct tc_device *st, const char *id, uint32_t hash) {
 122         struct tc_class *result = NULL, tmp;
 123         tmp.id = (char *)id;
 124         tmp.hash = (hash)?hash:simple_hash(tmp.id);
 125
 126         avl_search(&(st->classes_index), (avl *)&tmp, tc_class_iterator, (avl **)&result);
 127         return result;
 128 }
 129
 130 // ----------------------------------------------------------------------------
 131
 132 static void tc_class_free(struct tc_device *n, struct tc_class *c) {
 133         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);
 134
 135         if(c->next) c->next->prev = c->prev;
 136         if(c->prev) c->prev->next = c->next;
 137         if(n->classes == c) {
 138                 if(c->next) n->classes = c->next;
 139                 else n->classes = c->prev;
 140         }
 141
 142         tc_class_index_del(n, c);
 143
 144         if(c->id) free(c->id);
 145         if(c->name) free(c->name);
 146         if(c->leafid) free(c->leafid);
 147         if(c->parentid) free(c->parentid);
 148
 149         free(c);
 150 }
 151
 152 static void tc_device_classes_cleanup(struct tc_device *d) {
 153         static int cleanup_every = 999;
 154
 155         if(cleanup_every > 0) {
 156                 cleanup_every = -config_get_number("plugin:tc", "cleanup unused classes every", 60);
 157                 if(cleanup_every > 0) cleanup_every = -cleanup_every;
 158                 if(cleanup_every == 0) cleanup_every = -1;
 159         }
 160
 161         struct tc_class *c = d->classes;
 162         while(c) {
 163                 if(c->seen < cleanup_every) {
 164                         struct tc_class *nc = c->next;
 165                         tc_class_free(d, c);
 166                         c = nc;
 167                 }
 168                 else c = c->next;
 169
 170                 if(c) {
 171                         c->updated = 0;
 172                         c->seen--;
 173                 }
 174         }
 175 }
 176
 177 static void tc_device_commit(struct tc_device *d)
 178 {
 179         static int enable_new_interfaces = -1;
 180
 181         if(enable_new_interfaces == -1) enable_new_interfaces = config_get_boolean("plugin:tc", "enable new interfaces detected at runtime", 1);
 182
 183         // we only need to add leaf classes
 184         struct tc_class *c, *x;
 185
 186         // set all classes
 187         for(c = d->classes ; c ; c = c->next) {
 188                 c->isleaf = 1;
 189                 c->hasparent = 0;
 190         }
 191
 192         // mark the classes as leafs and parents
 193         for(c = d->classes ; c ; c = c->next) {
 194                 if(!c->updated) continue;
 195
 196                 for(x = d->classes ; x ; x = x->next) {
 197                         if(!x->updated) continue;
 198
 199                         if(c == x) continue;
 200
 201                         if(x->parentid && (
 202                                 (               c->hash      == x->parent_hash && strcmp(c->id,     x->parentid) == 0) ||
 203                                 (c->leafid   && c->leaf_hash == x->parent_hash && strcmp(c->leafid, x->parentid) == 0))) {
 204                                 // 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);
 205                                 c->isleaf = 0;
 206                                 x->hasparent = 1;
 207                         }
 208                 }
 209         }
 210
 211         // debugging:
 212         /*
 213         for ( c = d->classes ; c ; c = c->next) {
 214                 if(c->isleaf && c->hasparent) debug(D_TC_LOOP, "TC: Device %s, class %s, OK", d->name, c->id);
 215                 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);
 216         }
 217         */
 218
 219         // we need at least a class
 220         for(c = d->classes ; c ; c = c->next) {
 221                 // 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);
 222                 if(!c->updated) continue;
 223                 if(c->isleaf && c->hasparent) break;
 224         }
 225         if(!c) {
 226                 debug(D_TC_LOOP, "TC: Ignoring TC device '%s'. No leaf classes.", d->name?d->name:d->id);
 227                 tc_device_classes_cleanup(d);
 228                 return;
 229         }
 230
 231         char var_name[CONFIG_MAX_NAME + 1];
 232         snprintf(var_name, CONFIG_MAX_NAME, "qos for %s", d->id);
 233         if(config_get_boolean("plugin:tc", var_name, enable_new_interfaces)) {
 234                 RRDSET *st = rrdset_find_bytype(RRD_TYPE_TC, d->id);
 235                 if(!st) {
 236                         debug(D_TC_LOOP, "TC: Creating new chart for device '%s'", d->name?d->name:d->id);
 237
 238                         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);
 239
 240                         for(c = d->classes ; c ; c = c->next) {
 241                                 if(!c->updated) continue;
 242
 243                                 if(c->isleaf && c->hasparent)
 244                                         rrddim_add(st, c->id, c->name?c->name:c->id, 8, 1024, RRDDIM_INCREMENTAL);
 245                         }
 246                 }
 247                 else {
 248                         debug(D_TC_LOOP, "TC: Updating chart for device '%s'", d->name?d->name:d->id);
 249                         rrdset_next_plugins(st);
 250
 251                         if(d->name && strcmp(d->id, d->name) != 0) rrdset_set_name(st, d->name);
 252                 }
 253
 254                 for(c = d->classes ; c ; c = c->next) {
 255                         if(!c->updated) continue;
 256
 257                         if(c->isleaf && c->hasparent) {
 258                                 RRDDIM *rd = rrddim_find(st, c->id);
 259
 260                                 if(!rd) {
 261                                         debug(D_TC_LOOP, "TC: Adding to chart '%s', dimension '%s'", st->id, c->id, c->name);
 262
 263                                         // new class, we have to add it
 264                                         rd = rrddim_add(st, c->id, c->name?c->name:c->id, 8, 1024, RRDDIM_INCREMENTAL);
 265                                 }
 266                                 else debug(D_TC_LOOP, "TC: Updating chart '%s', dimension '%s'", st->id, c->id);
 267
 268                                 rrddim_set_by_pointer(st, rd, c->bytes);
 269
 270                                 // if it has a name, different to the id
 271                                 if(c->name) {
 272                                         // update the rrd dimension with the new name
 273                                         debug(D_TC_LOOP, "TC: Setting chart '%s', dimension '%s' name to '%s'", st->id, rd->id, c->name);
 274                                         rrddim_set_name(st, rd, c->name);
 275
 276                                         free(c->name);
 277                                         c->name = NULL;
 278                                 }
 279                         }
 280                 }
 281                 rrdset_done(st);
 282         }
 283
 284         tc_device_classes_cleanup(d);
 285 }
 286
 287 static void tc_device_set_class_name(struct tc_device *d, char *id, char *name)
 288 {
 289         struct tc_class *c = tc_class_index_find(d, id, 0);
 290         if(c) {
 291                 if(c->name) free(c->name);
 292                 c->name = NULL;
 293
 294                 if(name && *name && strcmp(c->id, name) != 0) {
 295                         debug(D_TC_LOOP, "TC: Setting device '%s', class '%s' name to '%s'", d->id, id, name);
 296                         c->name = strdup(name);
 297                 }
 298         }
 299 }
 300
 301 static void tc_device_set_device_name(struct tc_device *d, char *name) {
 302         if(d->name) free(d->name);
 303         d->name = NULL;
 304
 305         if(name && *name && strcmp(d->id, name) != 0) {
 306                 debug(D_TC_LOOP, "TC: Setting device '%s' name to '%s'", d->id, name);
 307                 d->name = strdup(name);
 308         }
 309 }
 310
 311 static void tc_device_set_device_family(struct tc_device *d, char *family) {
 312         if(d->family) free(d->family);
 313         d->family = NULL;
 314
 315         if(family && *family && strcmp(d->id, family) != 0) {
 316                 debug(D_TC_LOOP, "TC: Setting device '%s' family to '%s'", d->id, family);
 317                 d->family = strdup(family);
 318         }
 319         // no need for null termination - it is already null
 320 }
 321
 322 static struct tc_device *tc_device_create(char *id)
 323 {
 324         struct tc_device *d = tc_device_index_find(id, 0);
 325
 326         if(!d) {
 327                 debug(D_TC_LOOP, "TC: Creating device '%s'", id);
 328
 329                 d = calloc(1, sizeof(struct tc_device));
 330                 if(!d) {
 331                         fatal("Cannot allocate memory for tc_device %s", id);
 332                         return NULL;
 333                 }
 334
 335                 d->id = strdup(id);
 336                 d->hash = simple_hash(d->id);
 337
 338                 d->classes_index.root = NULL;
 339                 d->classes_index.compar = tc_class_compare;
 340 #ifdef AVL_LOCK_WITH_MUTEX
 341                 pthread_mutex_init(&d->classes_index.mutex, NULL);
 342 #else
 343                 pthread_rwlock_init(&d->classes_index.rwlock, NULL);
 344 #endif
 345
 346                 tc_device_index_add(d);
 347
 348                 if(!tc_device_root) {
 349                         tc_device_root = d;
 350                 }
 351                 else {
 352                         d->next = tc_device_root;
 353                         tc_device_root->prev = d;
 354                         tc_device_root = d;
 355                 }
 356         }
 357
 358         return(d);
 359 }
 360
 361 static struct tc_class *tc_class_add(struct tc_device *n, char *id, char *parentid, char *leafid)
 362 {
 363         struct tc_class *c = tc_class_index_find(n, id, 0);
 364
 365         if(!c) {
 366                 debug(D_TC_LOOP, "TC: Creating in device '%s', class id '%s', parentid '%s', leafid '%s'", n->id, id, parentid?parentid:"", leafid?leafid:"");
 367
 368                 c = calloc(1, sizeof(struct tc_class));
 369                 if(!c) {
 370                         fatal("Cannot allocate memory for tc class");
 371                         return NULL;
 372                 }
 373
 374                 if(n->classes) n->classes->prev = c;
 375                 c->next = n->classes;
 376                 n->classes = c;
 377
 378                 c->id = strdup(id);
 379                 if(!c->id) {
 380                         free(c);
 381                         return NULL;
 382                 }
 383                 c->hash = simple_hash(c->id);
 384
 385                 if(parentid && *parentid) {
 386                         c->parentid = strdup(parentid);
 387                         c->parent_hash = simple_hash(c->parentid);
 388                 }
 389
 390                 if(leafid && *leafid) {
 391                         c->leafid = strdup(leafid);
 392                         c->leaf_hash = simple_hash(c->leafid);
 393                 }
 394
 395                 tc_class_index_add(n, c);
 396         }
 397
 398         c->seen = 1;
 399
 400         return(c);
 401 }
 402
 403 static void tc_device_free(struct tc_device *n)
 404 {
 405         if(n->next) n->next->prev = n->prev;
 406         if(n->prev) n->prev->next = n->next;
 407         if(tc_device_root == n) {
 408                 if(n->next) tc_device_root = n->next;
 409                 else tc_device_root = n->prev;
 410         }
 411
 412         tc_device_index_del(n);
 413
 414         while(n->classes) tc_class_free(n, n->classes);
 415
 416         if(n->id) free(n->id);
 417         if(n->name) free(n->name);
 418         if(n->family) free(n->family);
 419
 420         free(n);
 421 }
 422
 423 static void tc_device_free_all()
 424 {
 425         while(tc_device_root)
 426                 tc_device_free(tc_device_root);
 427 }
 428
 429 #define MAX_WORDS 20
 430
 431 static inline int tc_space(char c) {
 432         switch(c) {
 433         case ' ':
 434         case '\t':
 435         case '\r':
 436         case '\n':
 437                 return 1;
 438
 439         default:
 440                 return 0;
 441         }
 442 }
 443
 444 static void tc_split_words(char *str, char **words, int max_words) {
 445         char *s = str;
 446         int i = 0;
 447
 448         // skip all white space
 449         while(tc_space(*s)) s++;
 450
 451         // store the first word
 452         words[i++] = s;
 453
 454         // while we have something
 455         while(*s) {
 456                 // if it is a space
 457                 if(tc_space(*s)) {
 458
 459                         // terminate the word
 460                         *s++ = '\0';
 461
 462                         // skip all white space
 463                         while(tc_space(*s)) s++;
 464
 465                         // if we reached the end, stop
 466                         if(!*s) break;
 467
 468                         // store the next word
 469                         if(i < max_words) words[i++] = s;
 470                         else break;
 471                 }
 472                 else s++;
 473         }
 474
 475         // terminate the words
 476         while(i < max_words) words[i++] = NULL;
 477 }
 478
 479 pid_t tc_child_pid = 0;
 480 void *tc_main(void *ptr)
 481 {
 482         if(ptr) { ; }
 483
 484         info("TC thread created with task id %d", gettid());
 485
 486         if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
 487                 error("Cannot set pthread cancel type to DEFERRED.");
 488
 489         if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
 490                 error("Cannot set pthread cancel state to ENABLE.");
 491
 492         struct rusage thread;
 493         RRDSET *stcpu = NULL, *sttime = NULL;
 494
 495         char buffer[TC_LINE_MAX+1] = "";
 496         char *words[MAX_WORDS] = { NULL };
 497
 498         uint32_t BEGIN_HASH = simple_hash("BEGIN");
 499         uint32_t END_HASH = simple_hash("END");
 500         uint32_t CLASS_HASH = simple_hash("class");
 501         uint32_t SENT_HASH = simple_hash("Sent");
 502         uint32_t SETDEVICENAME_HASH = simple_hash("SETDEVICENAME");
 503         uint32_t SETDEVICEGROUP_HASH = simple_hash("SETDEVICEGROUP");
 504         uint32_t SETCLASSNAME_HASH = simple_hash("SETCLASSNAME");
 505         uint32_t WORKTIME_HASH = simple_hash("WORKTIME");
 506 #ifdef DETACH_PLUGINS_FROM_NETDATA
 507         uint32_t MYPID_HASH = simple_hash("MYPID");
 508 #endif
 509         uint32_t first_hash;
 510
 511         for(;1;) {
 512                 FILE *fp;
 513                 struct tc_device *device = NULL;
 514                 struct tc_class *class = NULL;
 515
 516                 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);
 517                 debug(D_TC_LOOP, "executing '%s'", buffer);
 518                 // fp = popen(buffer, "r");
 519                 fp = mypopen(buffer, &tc_child_pid);
 520                 if(!fp) {
 521                         error("TC: Cannot popen(\"%s\", \"r\").", buffer);
 522                         return NULL;
 523                 }
 524
 525                 while(fgets(buffer, TC_LINE_MAX, fp) != NULL) {
 526                         if(netdata_exit) break;
 527
 528                         buffer[TC_LINE_MAX] = '\0';
 529                         // debug(D_TC_LOOP, "TC: read '%s'", buffer);
 530
 531                         tc_split_words(buffer, words, MAX_WORDS);
 532                         if(!words[0] || !*words[0]) {
 533                                 // debug(D_TC_LOOP, "empty line");
 534                                 continue;
 535                         }
 536                         // else debug(D_TC_LOOP, "First word is '%s'", words[0]);
 537
 538                         first_hash = simple_hash(words[0]);
 539
 540                         if(first_hash == CLASS_HASH && strcmp(words[0], "class") == 0 && device) {
 541                                 // 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]);
 542
 543                                 if(words[1] && words[2] && words[3] && words[4] && (strcmp(words[3], "parent") == 0 || strcmp(words[3], "root") == 0)) {
 544                                         // char *type     = words[1];  // the class: htb, fq_codel, etc
 545                                         char *id       = words[2];      // the class major:minor
 546                                         char *parent   = words[3];      // 'parent' or 'root'
 547                                         char *parentid = words[4];      // the parent's id
 548                                         char *leaf     = words[5];      // 'leaf'
 549                                         char *leafid   = words[6];      // leafid
 550
 551                                         if(strcmp(parent, "root") == 0) {
 552                                                 parentid = NULL;
 553                                                 leafid = NULL;
 554                                         }
 555                                         else if(!leaf || strcmp(leaf, "leaf") != 0)
 556                                                 leafid = NULL;
 557
 558                                         char leafbuf[20 + 1] = "";
 559                                         if(leafid && leafid[strlen(leafid) - 1] == ':') {
 560                                                 strncpy(leafbuf, leafid, 20 - 1);
 561                                                 strcat(leafbuf, "1");
 562                                                 leafid = leafbuf;
 563                                         }
 564
 565                                         class = tc_class_add(device, id, parentid, leafid);
 566                                 }
 567                         }
 568                         else if(first_hash == END_HASH && strcmp(words[0], "END") == 0) {
 569                                 // debug(D_TC_LOOP, "END line");
 570
 571                                 if(device) {
 572                                         if(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL) != 0)
 573                                                 error("Cannot set pthread cancel state to DISABLE.");
 574
 575                                         tc_device_commit(device);
 576                                         // tc_device_free(device);
 577                                         device = NULL;
 578                                         class = NULL;
 579
 580                                         if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
 581                                                 error("Cannot set pthread cancel state to ENABLE.");
 582                                 }
 583                         }
 584                         else if(first_hash == BEGIN_HASH && strcmp(words[0], "BEGIN") == 0) {
 585                                 // debug(D_TC_LOOP, "BEGIN line on device '%s'", words[1]);
 586
 587                                 if(device) {
 588                                         // tc_device_free(device);
 589                                         device = NULL;
 590                                         class = NULL;
 591                                 }
 592
 593                                 if(words[1] && *words[1]) {
 594                                         device = tc_device_create(words[1]);
 595                                         class = NULL;
 596                                 }
 597                         }
 598                         else if(first_hash == SENT_HASH && strcmp(words[0], "Sent") == 0 && device && class) {
 599                                 // debug(D_TC_LOOP, "SENT line '%s'", words[1]);
 600                                 if(words[1] && *words[1]) {
 601                                         class->bytes = atoll(words[1]);
 602                                         class->updated = 1;
 603                                 }
 604                                 else class->bytes = 0;
 605                         }
 606                         else if(first_hash == SETDEVICENAME_HASH && strcmp(words[0], "SETDEVICENAME") == 0 && device) {
 607                                 // debug(D_TC_LOOP, "SETDEVICENAME line '%s'", words[1]);
 608                                 if(words[1] && *words[1]) tc_device_set_device_name(device, words[1]);
 609                         }
 610                         else if(first_hash == SETDEVICEGROUP_HASH && strcmp(words[0], "SETDEVICEGROUP") == 0 && device) {
 611                                 // debug(D_TC_LOOP, "SETDEVICEGROUP line '%s'", words[1]);
 612                                 if(words[1] && *words[1]) tc_device_set_device_family(device, words[1]);
 613                         }
 614                         else if(first_hash == SETCLASSNAME_HASH && strcmp(words[0], "SETCLASSNAME") == 0 && device) {
 615                                 // debug(D_TC_LOOP, "SETCLASSNAME line '%s' '%s'", words[1], words[2]);
 616                                 char *id    = words[1];
 617                                 char *path  = words[2];
 618                                 if(id && *id && path && *path) tc_device_set_class_name(device, id, path);
 619                         }
 620                         else if(first_hash == WORKTIME_HASH && strcmp(words[0], "WORKTIME") == 0) {
 621                                 // debug(D_TC_LOOP, "WORKTIME line '%s' '%s'", words[1], words[2]);
 622                                 getrusage(RUSAGE_THREAD, &thread);
 623
 624                                 if(!stcpu) stcpu = rrdset_find("netdata.plugin_tc_cpu");
 625                                 if(!stcpu) {
 626                                         stcpu = rrdset_create("netdata", "plugin_tc_cpu", NULL, "netdata", "NetData TC CPU usage", "milliseconds/s", 10000, rrd_update_every, RRDSET_TYPE_STACKED);
 627                                         rrddim_add(stcpu, "user",  NULL,  1, 1000, RRDDIM_INCREMENTAL);
 628                                         rrddim_add(stcpu, "system", NULL, 1, 1000, RRDDIM_INCREMENTAL);
 629                                 }
 630                                 else rrdset_next(stcpu);
 631
 632                                 rrddim_set(stcpu, "user"  , thread.ru_utime.tv_sec * 1000000ULL + thread.ru_utime.tv_usec);
 633                                 rrddim_set(stcpu, "system", thread.ru_stime.tv_sec * 1000000ULL + thread.ru_stime.tv_usec);
 634                                 rrdset_done(stcpu);
 635
 636                                 if(!sttime) stcpu = rrdset_find("netdata.plugin_tc_time");
 637                                 if(!sttime) {
 638                                         sttime = rrdset_create("netdata", "plugin_tc_time", NULL, "netdata", "NetData TC script execution", "milliseconds/run", 10001, rrd_update_every, RRDSET_TYPE_AREA);
 639                                         rrddim_add(sttime, "run_time",  "run time",  1, 1, RRDDIM_ABSOLUTE);
 640                                 }
 641                                 else rrdset_next(sttime);
 642
 643                                 rrddim_set(sttime, "run_time", atoll(words[1]));
 644                                 rrdset_done(sttime);
 645
 646                         }
 647 #ifdef DETACH_PLUGINS_FROM_NETDATA
 648                         else if(first_hash == MYPID_HASH && (strcmp(words[0], "MYPID") == 0)) {
 649                                 // debug(D_TC_LOOP, "MYPID line '%s'", words[1]);
 650                                 char *id = words[1];
 651                                 pid_t pid = atol(id);
 652
 653                                 if(pid) tc_child_pid = pid;
 654
 655                                 debug(D_TC_LOOP, "TC: Child PID is %d.", tc_child_pid);
 656                         }
 657 #endif
 658                         //else {
 659                         //      debug(D_TC_LOOP, "IGNORED line");
 660                         //}
 661                 }
 662                 mypclose(fp, tc_child_pid);
 663                 tc_child_pid = 0;
 664
 665                 if(device) {
 666                         // tc_device_free(device);
 667                         device = NULL;
 668                         class = NULL;
 669                 }
 670
 671                 if(netdata_exit) {
 672                         tc_device_free_all();
 673                         return NULL;
 674                 }
 675
 676                 sleep(rrd_update_every);
 677         }
 678
 679         return NULL;
 680 }
 681