Imported Upstream version 1.0.0upstream/1.0.0

1 files changed, 737 insertions, 0 deletions

diff --git a/src/plugin_tc.c b/src/plugin_tc.c
new file mode 100755
index 000000000..f02b70788
--- /dev/null
+++ b/src/plugin_tc.c
@@ -0,0 +1,737 @@
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/resource.h>
+
+#include "avl.h"
+#include "log.h"
+#include "common.h"
+#include "appconfig.h"
+#include "rrd.h"
+#include "popen.h"
+#include "plugin_tc.h"
+#include "main.h"
+
+#define RRD_TYPE_TC					"tc"
+#define RRD_TYPE_TC_LEN				strlen(RRD_TYPE_TC)
+
+// ----------------------------------------------------------------------------
+// /sbin/tc processor
+// this requires the script plugins.d/tc-qos-helper.sh
+
+#define TC_LINE_MAX 1024
+
+struct tc_class {
+	avl avl;
+
+	char *id;
+	uint32_t hash;
+
+	char *name;
+
+	char *leafid;
+	uint32_t leaf_hash;
+
+	char *parentid;
+	uint32_t parent_hash;
+
+	char hasparent;
+	char isleaf;
+	unsigned long long bytes;
+	unsigned long long packets;
+	unsigned long long dropped;
+	unsigned long long overlimits;
+	unsigned long long requeues;
+	unsigned long long lended;
+	unsigned long long borrowed;
+	unsigned long long giants;
+	unsigned long long tokens;
+	unsigned long long ctokens;
+
+	char updated;	// updated bytes
+	char seen;		// seen in the tc list (even without bytes)
+
+	struct tc_class *next;
+	struct tc_class *prev;
+};
+
+struct tc_device {
+	avl avl;
+
+	char *id;
+	uint32_t hash;
+
+	char *name;
+	char *family;
+
+	avl_tree classes_index;
+
+	struct tc_class *classes;
+
+	struct tc_device *next;
+	struct tc_device *prev;
+};
+
+
+struct tc_device *tc_device_root = NULL;
+
+// ----------------------------------------------------------------------------
+// tc_device index
+
+static int tc_device_iterator(avl *a) { if(a) {}; return 0; }
+
+static int tc_device_compare(void* a, void* b) {
+	if(((struct tc_device *)a)->hash < ((struct tc_device *)b)->hash) return -1;
+	else if(((struct tc_device *)a)->hash > ((struct tc_device *)b)->hash) return 1;
+	else return strcmp(((struct tc_device *)a)->id, ((struct tc_device *)b)->id);
+}
+
+avl_tree tc_device_root_index = {
+		NULL,
+		tc_device_compare,
+#ifdef AVL_LOCK_WITH_MUTEX
+		PTHREAD_MUTEX_INITIALIZER
+#else
+		PTHREAD_RWLOCK_INITIALIZER
+#endif
+};
+
+#define tc_device_index_add(st) avl_insert(&tc_device_root_index, (avl *)(st))
+#define tc_device_index_del(st) avl_remove(&tc_device_root_index, (avl *)(st))
+
+static struct tc_device *tc_device_index_find(const char *id, uint32_t hash) {
+	struct tc_device *result = NULL, tmp;
+	tmp.id = (char *)id;
+	tmp.hash = (hash)?hash:simple_hash(tmp.id);
+
+	avl_search(&(tc_device_root_index), (avl *)&tmp, tc_device_iterator, (avl **)&result);
+	return result;
+}
+
+
+// ----------------------------------------------------------------------------
+// tc_class index
+
+static int tc_class_iterator(avl *a) { if(a) {}; return 0; }
+
+static int tc_class_compare(void* a, void* b) {
+	if(((struct tc_class *)a)->hash < ((struct tc_class *)b)->hash) return -1;
+	else if(((struct tc_class *)a)->hash > ((struct tc_class *)b)->hash) return 1;
+	else return strcmp(((struct tc_class *)a)->id, ((struct tc_class *)b)->id);
+}
+
+#define tc_class_index_add(st, rd) avl_insert(&((st)->classes_index), (avl *)(rd))
+#define tc_class_index_del(st, rd) avl_remove(&((st)->classes_index), (avl *)(rd))
+
+static struct tc_class *tc_class_index_find(struct tc_device *st, const char *id, uint32_t hash) {
+	struct tc_class *result = NULL, tmp;
+	tmp.id = (char *)id;
+	tmp.hash = (hash)?hash:simple_hash(tmp.id);
+
+	avl_search(&(st->classes_index), (avl *)&tmp, tc_class_iterator, (avl **)&result);
+	return result;
+}
+
+// ----------------------------------------------------------------------------
+
+static void tc_class_free(struct tc_device *n, struct tc_class *c) {
+	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);
+
+	if(c->next) c->next->prev = c->prev;
+	if(c->prev) c->prev->next = c->next;
+	if(n->classes == c) {
+		if(c->next) n->classes = c->next;
+		else n->classes = c->prev;
+	}
+
+	tc_class_index_del(n, c);
+
+	if(c->id) free(c->id);
+	if(c->name) free(c->name);
+	if(c->leafid) free(c->leafid);
+	if(c->parentid) free(c->parentid);
+
+	free(c);
+}
+
+static void tc_device_classes_cleanup(struct tc_device *d) {
+	static int cleanup_every = 999;
+
+	if(cleanup_every > 0) {
+		cleanup_every = (int) -config_get_number("plugin:tc", "cleanup unused classes every", 60);
+		if(cleanup_every > 0) cleanup_every = -cleanup_every;
+		if(cleanup_every == 0) cleanup_every = -1;
+	}
+
+	struct tc_class *c = d->classes;
+	while(c) {
+		if(c->seen < cleanup_every) {
+			struct tc_class *nc = c->next;
+			tc_class_free(d, c);
+			c = nc;
+		}
+		else c = c->next;
+
+		if(c) {
+			c->updated = 0;
+			c->seen--;
+		}
+	}
+}
+
+static void tc_device_commit(struct tc_device *d)
+{
+	static int enable_new_interfaces = -1;
+
+	if(enable_new_interfaces == -1)	enable_new_interfaces = config_get_boolean("plugin:tc", "enable new interfaces detected at runtime", 1);
+
+	// we only need to add leaf classes
+	struct tc_class *c, *x;
+
+	// set all classes
+	for(c = d->classes ; c ; c = c->next) {
+		c->isleaf = 1;
+		c->hasparent = 0;
+	}
+
+	// mark the classes as leafs and parents
+	for(c = d->classes ; c ; c = c->next) {
+		if(!c->updated) continue;
+
+		for(x = d->classes ; x ; x = x->next) {
+			if(!x->updated) continue;
+
+			if(c == x) continue;
+
+			if(x->parentid && (
+				(               c->hash      == x->parent_hash && strcmp(c->id,     x->parentid) == 0) ||
+				(c->leafid   && c->leaf_hash == x->parent_hash && strcmp(c->leafid, x->parentid) == 0))) {
+				// 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);
+				c->isleaf = 0;
+				x->hasparent = 1;
+			}
+		}
+	}
+
+	// debugging:
+	/*
+	for ( c = d->classes ; c ; c = c->next) {
+		if(c->isleaf && c->hasparent) debug(D_TC_LOOP, "TC: Device %s, class %s, OK", d->name, c->id);
+		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);
+	}
+	*/
+
+	// we need at least a class
+	for(c = d->classes ; c ; c = c->next) {
+		// 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);
+		if(!c->updated) continue;
+		if(c->isleaf && c->hasparent) break;
+	}
+	if(!c) {
+		debug(D_TC_LOOP, "TC: Ignoring TC device '%s'. No leaf classes.", d->name?d->name:d->id);
+		tc_device_classes_cleanup(d);
+		return;
+	}
+
+	char var_name[CONFIG_MAX_NAME + 1];
+	snprintf(var_name, CONFIG_MAX_NAME, "qos for %s", d->id);
+	if(config_get_boolean("plugin:tc", var_name, enable_new_interfaces)) {
+		RRDSET *st = rrdset_find_bytype(RRD_TYPE_TC, d->id);
+		if(!st) {
+			debug(D_TC_LOOP, "TC: Creating new chart for device '%s'", d->name?d->name:d->id);
+
+			st = rrdset_create(RRD_TYPE_TC, d->id, d->name?d->name:d->id, d->family?d->family:d->id, RRD_TYPE_TC ".qos", "Class Usage", "kilobits/s", 7000, rrd_update_every, RRDSET_TYPE_STACKED);
+
+			for(c = d->classes ; c ; c = c->next) {
+				if(!c->updated) continue;
+
+				if(c->isleaf && c->hasparent)
+					rrddim_add(st, c->id, c->name?c->name:c->id, 8, 1024, RRDDIM_INCREMENTAL);
+			}
+		}
+		else {
+			debug(D_TC_LOOP, "TC: Updating chart for device '%s'", d->name?d->name:d->id);
+			rrdset_next_plugins(st);
+
+			if(d->name && strcmp(d->id, d->name) != 0) rrdset_set_name(st, d->name);
+		}
+
+		for(c = d->classes ; c ; c = c->next) {
+			if(!c->updated) continue;
+
+			if(c->isleaf && c->hasparent) {
+				RRDDIM *rd = rrddim_find(st, c->id);
+
+				if(!rd) {
+					debug(D_TC_LOOP, "TC: Adding to chart '%s', dimension '%s'", st->id, c->id, c->name);
+
+					// new class, we have to add it
+					rd = rrddim_add(st, c->id, c->name?c->name:c->id, 8, 1024, RRDDIM_INCREMENTAL);
+				}
+				else debug(D_TC_LOOP, "TC: Updating chart '%s', dimension '%s'", st->id, c->id);
+
+				rrddim_set_by_pointer(st, rd, c->bytes);
+
+				// if it has a name, different to the id
+				if(c->name) {
+					// update the rrd dimension with the new name
+					debug(D_TC_LOOP, "TC: Setting chart '%s', dimension '%s' name to '%s'", st->id, rd->id, c->name);
+					rrddim_set_name(st, rd, c->name);
+
+					free(c->name);
+					c->name = NULL;
+				}
+			}
+		}
+		rrdset_done(st);
+	}
+
+	tc_device_classes_cleanup(d);
+}
+
+static void tc_device_set_class_name(struct tc_device *d, char *id, char *name)
+{
+	struct tc_class *c = tc_class_index_find(d, id, 0);
+	if(c) {
+		if(c->name) free(c->name);
+		c->name = NULL;
+
+		if(name && *name && strcmp(c->id, name) != 0) {
+			debug(D_TC_LOOP, "TC: Setting device '%s', class '%s' name to '%s'", d->id, id, name);
+			c->name = strdup(name);
+		}
+	}
+}
+
+static void tc_device_set_device_name(struct tc_device *d, char *name) {
+	if(d->name) free(d->name);
+	d->name = NULL;
+
+	if(name && *name && strcmp(d->id, name) != 0) {
+		debug(D_TC_LOOP, "TC: Setting device '%s' name to '%s'", d->id, name);
+		d->name = strdup(name);
+	}
+}
+
+static void tc_device_set_device_family(struct tc_device *d, char *family) {
+	if(d->family) free(d->family);
+	d->family = NULL;
+
+	if(family && *family && strcmp(d->id, family) != 0) {
+		debug(D_TC_LOOP, "TC: Setting device '%s' family to '%s'", d->id, family);
+		d->family = strdup(family);
+	}
+	// no need for null termination - it is already null
+}
+
+static struct tc_device *tc_device_create(char *id)
+{
+	struct tc_device *d = tc_device_index_find(id, 0);
+
+	if(!d) {
+		debug(D_TC_LOOP, "TC: Creating device '%s'", id);
+
+		d = calloc(1, sizeof(struct tc_device));
+		if(!d) {
+			fatal("Cannot allocate memory for tc_device %s", id);
+			return NULL;
+		}
+
+		d->id = strdup(id);
+		d->hash = simple_hash(d->id);
+
+		d->classes_index.root = NULL;
+		d->classes_index.compar = tc_class_compare;
+#ifdef AVL_LOCK_WITH_MUTEX
+		pthread_mutex_init(&d->classes_index.mutex, NULL);
+#else
+		pthread_rwlock_init(&d->classes_index.rwlock, NULL);
+#endif
+
+		tc_device_index_add(d);
+
+		if(!tc_device_root) {
+			tc_device_root = d;
+		}
+		else {
+			d->next = tc_device_root;
+			tc_device_root->prev = d;
+			tc_device_root = d;
+		}
+	}
+
+	return(d);
+}
+
+static struct tc_class *tc_class_add(struct tc_device *n, char *id, char *parentid, char *leafid)
+{
+	struct tc_class *c = tc_class_index_find(n, id, 0);
+
+	if(!c) {
+		debug(D_TC_LOOP, "TC: Creating in device '%s', class id '%s', parentid '%s', leafid '%s'", n->id, id, parentid?parentid:"", leafid?leafid:"");
+
+		c = calloc(1, sizeof(struct tc_class));
+		if(!c) {
+			fatal("Cannot allocate memory for tc class");
+			return NULL;
+		}
+
+		if(n->classes) n->classes->prev = c;
+		c->next = n->classes;
+		n->classes = c;
+
+		c->id = strdup(id);
+		if(!c->id) {
+			free(c);
+			return NULL;
+		}
+		c->hash = simple_hash(c->id);
+
+		if(parentid && *parentid) {
+			c->parentid = strdup(parentid);
+			c->parent_hash = simple_hash(c->parentid);
+		}
+
+		if(leafid && *leafid) {
+			c->leafid = strdup(leafid);
+			c->leaf_hash = simple_hash(c->leafid);
+		}
+
+		tc_class_index_add(n, c);
+	}
+
+	c->seen = 1;
+
+	return(c);
+}
+
+static void tc_device_free(struct tc_device *n)
+{
+	if(n->next) n->next->prev = n->prev;
+	if(n->prev) n->prev->next = n->next;
+	if(tc_device_root == n) {
+		if(n->next) tc_device_root = n->next;
+		else tc_device_root = n->prev;
+	}
+
+	tc_device_index_del(n);
+
+	while(n->classes) tc_class_free(n, n->classes);
+
+	if(n->id) free(n->id);
+	if(n->name) free(n->name);
+	if(n->family) free(n->family);
+
+	free(n);
+}
+
+static void tc_device_free_all()
+{
+	while(tc_device_root)
+		tc_device_free(tc_device_root);
+}
+
+#define MAX_WORDS 20
+
+static inline int tc_space(char c) {
+	switch(c) {
+	case ' ':
+	case '\t':
+	case '\r':
+	case '\n':
+		return 1;
+
+	default:
+		return 0;
+	}
+}
+
+static void tc_split_words(char *str, char **words, int max_words) {
+	char *s = str;
+	int i = 0;
+
+	// skip all white space
+	while(tc_space(*s)) s++;
+
+	// store the first word
+	words[i++] = s;
+
+	// while we have something
+	while(*s) {
+		// if it is a space
+		if(tc_space(*s)) {
+
+			// terminate the word
+			*s++ = '\0';
+
+			// skip all white space
+			while(tc_space(*s)) s++;
+
+			// if we reached the end, stop
+			if(!*s) break;
+
+			// store the next word
+			if(i < max_words) words[i++] = s;
+			else break;
+		}
+		else s++;
+	}
+
+	// terminate the words
+	while(i < max_words) words[i++] = NULL;
+}
+
+pid_t tc_child_pid = 0;
+void *tc_main(void *ptr)
+{
+	if(ptr) { ; }
+
+	info("TC thread created with task id %d", gettid());
+
+	if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
+		error("Cannot set pthread cancel type to DEFERRED.");
+
+	if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
+		error("Cannot set pthread cancel state to ENABLE.");
+
+	struct rusage thread;
+	RRDSET *stcpu = NULL, *sttime = NULL;
+
+	char buffer[TC_LINE_MAX+1] = "";
+	char *words[MAX_WORDS] = { NULL };
+
+	uint32_t BEGIN_HASH = simple_hash("BEGIN");
+	uint32_t END_HASH = simple_hash("END");
+	uint32_t CLASS_HASH = simple_hash("class");
+	uint32_t SENT_HASH = simple_hash("Sent");
+	uint32_t LENDED_HASH = simple_hash("lended:");
+	uint32_t TOKENS_HASH = simple_hash("tokens:");
+	uint32_t SETDEVICENAME_HASH = simple_hash("SETDEVICENAME");
+	uint32_t SETDEVICEGROUP_HASH = simple_hash("SETDEVICEGROUP");
+	uint32_t SETCLASSNAME_HASH = simple_hash("SETCLASSNAME");
+	uint32_t WORKTIME_HASH = simple_hash("WORKTIME");
+#ifdef DETACH_PLUGINS_FROM_NETDATA
+	uint32_t MYPID_HASH = simple_hash("MYPID");
+#endif
+	uint32_t first_hash;
+
+	for(;1;) {
+		if(unlikely(netdata_exit)) break;
+
+		FILE *fp;
+		struct tc_device *device = NULL;
+		struct tc_class *class = NULL;
+
+		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);
+		debug(D_TC_LOOP, "executing '%s'", buffer);
+		// fp = popen(buffer, "r");
+		fp = mypopen(buffer, &tc_child_pid);
+		if(!fp) {
+			error("TC: Cannot popen(\"%s\", \"r\").", buffer);
+			pthread_exit(NULL);
+			return NULL;
+		}
+
+		while(fgets(buffer, TC_LINE_MAX, fp) != NULL) {
+			if(unlikely(netdata_exit)) break;
+
+			buffer[TC_LINE_MAX] = '\0';
+			// debug(D_TC_LOOP, "TC: read '%s'", buffer);
+
+			tc_split_words(buffer, words, MAX_WORDS);
+			if(!words[0] || !*words[0]) {
+				// debug(D_TC_LOOP, "empty line");
+				continue;
+			}
+			// else debug(D_TC_LOOP, "First word is '%s'", words[0]);
+
+			first_hash = simple_hash(words[0]);
+
+			if(device && first_hash == CLASS_HASH && strcmp(words[0], "class") == 0) {
+				// 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]);
+
+				// clear the last class
+				class = NULL;
+
+				// words[1] : class type
+				// words[2] : N:XX
+				// words[3] : parent or root
+				if(words[1] && words[2] && words[3] && (strcmp(words[3], "parent") == 0 || strcmp(words[3], "root") == 0)) {
+					//char *type     = words[1];  // the class: htb, fq_codel, etc
+
+					// we are only interested for HTB classes
+					//if(strcmp(type, "htb") != 0) continue;
+
+					char *id       = words[2];	// the class major:minor
+					char *parent   = words[3];	// 'parent' or 'root'
+					char *parentid = words[4];	// the parent's id
+					char *leaf     = words[5];	// 'leaf'
+					char *leafid   = words[6];	// leafid
+
+					if(strcmp(parent, "root") == 0) {
+						parentid = NULL;
+						leafid = NULL;
+					}
+					else if(!leaf || strcmp(leaf, "leaf") != 0)
+						leafid = NULL;
+
+					char leafbuf[20 + 1] = "";
+					if(leafid && leafid[strlen(leafid) - 1] == ':') {
+						strncpy(leafbuf, leafid, 20 - 1);
+						strcat(leafbuf, "1");
+						leafid = leafbuf;
+					}
+
+					class = tc_class_add(device, id, parentid, leafid);
+				}
+			}
+			else if(first_hash == END_HASH && strcmp(words[0], "END") == 0) {
+				// debug(D_TC_LOOP, "END line");
+
+				if(device) {
+					if(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL) != 0)
+						error("Cannot set pthread cancel state to DISABLE.");
+
+					tc_device_commit(device);
+					// tc_device_free(device);
+					device = NULL;
+					class = NULL;
+
+					if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
+						error("Cannot set pthread cancel state to ENABLE.");
+				}
+			}
+			else if(first_hash == BEGIN_HASH && strcmp(words[0], "BEGIN") == 0) {
+				// debug(D_TC_LOOP, "BEGIN line on device '%s'", words[1]);
+
+				if(device) {
+					// tc_device_free(device);
+					device = NULL;
+					class = NULL;
+				}
+
+				if(words[1] && *words[1]) {
+					device = tc_device_create(words[1]);
+					class = NULL;
+				}
+			}
+			else if(device && class && first_hash == SENT_HASH && strcmp(words[0], "Sent") == 0) {
+				// debug(D_TC_LOOP, "SENT line '%s'", words[1]);
+				if(words[1] && *words[1]) {
+					class->bytes = strtoull(words[1], NULL, 10);
+					class->updated = 1;
+				}
+
+				if(words[3] && *words[3])
+					class->packets = strtoull(words[3], NULL, 10);
+
+				if(words[6] && *words[6])
+					class->dropped = strtoull(words[6], NULL, 10);
+
+				if(words[8] && *words[8])
+					class->overlimits = strtoull(words[8], NULL, 10);
+
+				if(words[10] && *words[10])
+					class->requeues = strtoull(words[8], NULL, 10);
+			}
+			else if(device && class && class->updated && first_hash == LENDED_HASH && strcmp(words[0], "lended:") == 0) {
+				// debug(D_TC_LOOP, "LENDED line '%s'", words[1]);
+				if(words[1] && *words[1])
+					class->lended = strtoull(words[1], NULL, 10);
+
+				if(words[3] && *words[3])
+					class->borrowed = strtoull(words[3], NULL, 10);
+
+				if(words[5] && *words[5])
+					class->giants = strtoull(words[5], NULL, 10);
+			}
+			else if(device && class && class->updated && first_hash == TOKENS_HASH && strcmp(words[0], "tokens:") == 0) {
+				// debug(D_TC_LOOP, "TOKENS line '%s'", words[1]);
+				if(words[1] && *words[1])
+					class->tokens = strtoull(words[1], NULL, 10);
+
+				if(words[3] && *words[3])
+					class->ctokens = strtoull(words[3], NULL, 10);
+			}
+			else if(device && first_hash == SETDEVICENAME_HASH && strcmp(words[0], "SETDEVICENAME") == 0) {
+				// debug(D_TC_LOOP, "SETDEVICENAME line '%s'", words[1]);
+				if(words[1] && *words[1]) tc_device_set_device_name(device, words[1]);
+			}
+			else if(device && first_hash == SETDEVICEGROUP_HASH && strcmp(words[0], "SETDEVICEGROUP") == 0) {
+				// debug(D_TC_LOOP, "SETDEVICEGROUP line '%s'", words[1]);
+				if(words[1] && *words[1]) tc_device_set_device_family(device, words[1]);
+			}
+			else if(device && first_hash == SETCLASSNAME_HASH && strcmp(words[0], "SETCLASSNAME") == 0) {
+				// debug(D_TC_LOOP, "SETCLASSNAME line '%s' '%s'", words[1], words[2]);
+				char *id    = words[1];
+				char *path  = words[2];
+				if(id && *id && path && *path) tc_device_set_class_name(device, id, path);
+			}
+			else if(first_hash == WORKTIME_HASH && strcmp(words[0], "WORKTIME") == 0) {
+				// debug(D_TC_LOOP, "WORKTIME line '%s' '%s'", words[1], words[2]);
+				getrusage(RUSAGE_THREAD, &thread);
+
+				if(!stcpu) stcpu = rrdset_find("netdata.plugin_tc_cpu");
+				if(!stcpu) {
+					stcpu = rrdset_create("netdata", "plugin_tc_cpu", NULL, "tc.helper", NULL, "NetData TC CPU usage", "milliseconds/s", 135000, rrd_update_every, RRDSET_TYPE_STACKED);
+					rrddim_add(stcpu, "user",  NULL,  1, 1000, RRDDIM_INCREMENTAL);
+					rrddim_add(stcpu, "system", NULL, 1, 1000, RRDDIM_INCREMENTAL);
+				}
+				else rrdset_next(stcpu);
+
+				rrddim_set(stcpu, "user"  , thread.ru_utime.tv_sec * 1000000ULL + thread.ru_utime.tv_usec);
+				rrddim_set(stcpu, "system", thread.ru_stime.tv_sec * 1000000ULL + thread.ru_stime.tv_usec);
+				rrdset_done(stcpu);
+
+				if(!sttime) stcpu = rrdset_find("netdata.plugin_tc_time");
+				if(!sttime) {
+					sttime = rrdset_create("netdata", "plugin_tc_time", NULL, "tc.helper", NULL, "NetData TC script execution", "milliseconds/run", 135001, rrd_update_every, RRDSET_TYPE_AREA);
+					rrddim_add(sttime, "run_time",  "run time",  1, 1, RRDDIM_ABSOLUTE);
+				}
+				else rrdset_next(sttime);
+
+				rrddim_set(sttime, "run_time", atoll(words[1]));
+				rrdset_done(sttime);
+
+			}
+#ifdef DETACH_PLUGINS_FROM_NETDATA
+			else if(first_hash == MYPID_HASH && (strcmp(words[0], "MYPID") == 0)) {
+				// debug(D_TC_LOOP, "MYPID line '%s'", words[1]);
+				char *id = words[1];
+				pid_t pid = atol(id);
+
+				if(pid) tc_child_pid = pid;
+
+				debug(D_TC_LOOP, "TC: Child PID is %d.", tc_child_pid);
+			}
+#endif
+			//else {
+			//	debug(D_TC_LOOP, "IGNORED line");
+			//}
+		}
+		mypclose(fp, tc_child_pid);
+		tc_child_pid = 0;
+
+		if(device) {
+			// tc_device_free(device);
+			device = NULL;
+			class = NULL;
+		}
+
+		if(netdata_exit) {
+			tc_device_free_all();
+			pthread_exit(NULL);
+			return NULL;
+		}
+
+		sleep((unsigned int) rrd_update_every);
+	}
+
+	pthread_exit(NULL);
+	return NULL;
+}
+