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