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-rw-r--r--database/rrdset.c1637
1 files changed, 1637 insertions, 0 deletions
diff --git a/database/rrdset.c b/database/rrdset.c
new file mode 100644
index 0000000..d74ac91
--- /dev/null
+++ b/database/rrdset.c
@@ -0,0 +1,1637 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#define NETDATA_RRD_INTERNALS
+#include "rrd.h"
+
+void __rrdset_check_rdlock(RRDSET *st, const char *file, const char *function, const unsigned long line) {
+ debug(D_RRD_CALLS, "Checking read lock on chart '%s'", st->id);
+
+ int ret = netdata_rwlock_trywrlock(&st->rrdset_rwlock);
+ if(ret == 0)
+ fatal("RRDSET '%s' should be read-locked, but it is not, at function %s() at line %lu of file '%s'", st->id, function, line, file);
+}
+
+void __rrdset_check_wrlock(RRDSET *st, const char *file, const char *function, const unsigned long line) {
+ debug(D_RRD_CALLS, "Checking write lock on chart '%s'", st->id);
+
+ int ret = netdata_rwlock_tryrdlock(&st->rrdset_rwlock);
+ if(ret == 0)
+ fatal("RRDSET '%s' should be write-locked, but it is not, at function %s() at line %lu of file '%s'", st->id, function, line, file);
+}
+
+
+// ----------------------------------------------------------------------------
+// RRDSET index
+
+int rrdset_compare(void* a, void* b) {
+ if(((RRDSET *)a)->hash < ((RRDSET *)b)->hash) return -1;
+ else if(((RRDSET *)a)->hash > ((RRDSET *)b)->hash) return 1;
+ else return strcmp(((RRDSET *)a)->id, ((RRDSET *)b)->id);
+}
+
+static RRDSET *rrdset_index_find(RRDHOST *host, const char *id, uint32_t hash) {
+ RRDSET tmp;
+ strncpyz(tmp.id, id, RRD_ID_LENGTH_MAX);
+ tmp.hash = (hash)?hash:simple_hash(tmp.id);
+
+ return (RRDSET *)avl_search_lock(&(host->rrdset_root_index), (avl *) &tmp);
+}
+
+// ----------------------------------------------------------------------------
+// RRDSET name index
+
+#define rrdset_from_avlname(avlname_ptr) ((RRDSET *)((avlname_ptr) - offsetof(RRDSET, avlname)))
+
+int rrdset_compare_name(void* a, void* b) {
+ RRDSET *A = rrdset_from_avlname(a);
+ RRDSET *B = rrdset_from_avlname(b);
+
+ // fprintf(stderr, "COMPARING: %s with %s\n", A->name, B->name);
+
+ if(A->hash_name < B->hash_name) return -1;
+ else if(A->hash_name > B->hash_name) return 1;
+ else return strcmp(A->name, B->name);
+}
+
+RRDSET *rrdset_index_add_name(RRDHOST *host, RRDSET *st) {
+ void *result;
+ // fprintf(stderr, "ADDING: %s (name: %s)\n", st->id, st->name);
+ result = avl_insert_lock(&host->rrdset_root_index_name, (avl *) (&st->avlname));
+ if(result) return rrdset_from_avlname(result);
+ return NULL;
+}
+
+RRDSET *rrdset_index_del_name(RRDHOST *host, RRDSET *st) {
+ void *result;
+ // fprintf(stderr, "DELETING: %s (name: %s)\n", st->id, st->name);
+ result = (RRDSET *)avl_remove_lock(&((host)->rrdset_root_index_name), (avl *)(&st->avlname));
+ if(result) return rrdset_from_avlname(result);
+ return NULL;
+}
+
+
+// ----------------------------------------------------------------------------
+// RRDSET - find charts
+
+static inline RRDSET *rrdset_index_find_name(RRDHOST *host, const char *name, uint32_t hash) {
+ void *result = NULL;
+ RRDSET tmp;
+ tmp.name = name;
+ tmp.hash_name = (hash)?hash:simple_hash(tmp.name);
+
+ // fprintf(stderr, "SEARCHING: %s\n", name);
+ result = avl_search_lock(&host->rrdset_root_index_name, (avl *) (&(tmp.avlname)));
+ if(result) {
+ RRDSET *st = rrdset_from_avlname(result);
+ if(strcmp(st->magic, RRDSET_MAGIC) != 0)
+ error("Search for RRDSET %s returned an invalid RRDSET %s (name %s)", name, st->id, st->name);
+
+ // fprintf(stderr, "FOUND: %s\n", name);
+ return rrdset_from_avlname(result);
+ }
+ // fprintf(stderr, "NOT FOUND: %s\n", name);
+ return NULL;
+}
+
+inline RRDSET *rrdset_find(RRDHOST *host, const char *id) {
+ debug(D_RRD_CALLS, "rrdset_find() for chart '%s' in host '%s'", id, host->hostname);
+ RRDSET *st = rrdset_index_find(host, id, 0);
+ return(st);
+}
+
+inline RRDSET *rrdset_find_bytype(RRDHOST *host, const char *type, const char *id) {
+ debug(D_RRD_CALLS, "rrdset_find_bytype() for chart '%s.%s' in host '%s'", type, id, host->hostname);
+
+ char buf[RRD_ID_LENGTH_MAX + 1];
+ strncpyz(buf, type, RRD_ID_LENGTH_MAX - 1);
+ strcat(buf, ".");
+ int len = (int) strlen(buf);
+ strncpyz(&buf[len], id, (size_t) (RRD_ID_LENGTH_MAX - len));
+
+ return(rrdset_find(host, buf));
+}
+
+inline RRDSET *rrdset_find_byname(RRDHOST *host, const char *name) {
+ debug(D_RRD_CALLS, "rrdset_find_byname() for chart '%s' in host '%s'", name, host->hostname);
+ RRDSET *st = rrdset_index_find_name(host, name, 0);
+ return(st);
+}
+
+// ----------------------------------------------------------------------------
+// RRDSET - rename charts
+
+char *rrdset_strncpyz_name(char *to, const char *from, size_t length) {
+ char c, *p = to;
+
+ while (length-- && (c = *from++)) {
+ if(c != '.' && !isalnum(c))
+ c = '_';
+
+ *p++ = c;
+ }
+
+ *p = '\0';
+
+ return to;
+}
+
+int rrdset_set_name(RRDSET *st, const char *name) {
+ if(unlikely(st->name && !strcmp(st->name, name)))
+ return 1;
+
+ RRDHOST *host = st->rrdhost;
+
+ debug(D_RRD_CALLS, "rrdset_set_name() old: '%s', new: '%s'", st->name?st->name:"", name);
+
+ char b[CONFIG_MAX_VALUE + 1];
+ char n[RRD_ID_LENGTH_MAX + 1];
+
+ snprintfz(n, RRD_ID_LENGTH_MAX, "%s.%s", st->type, name);
+ rrdset_strncpyz_name(b, n, CONFIG_MAX_VALUE);
+
+ if(rrdset_index_find_name(host, b, 0)) {
+ error("RRDSET: chart name '%s' on host '%s' already exists.", b, host->hostname);
+ return 0;
+ }
+
+ if(st->name) {
+ rrdset_index_del_name(host, st);
+ st->name = config_set_default(st->config_section, "name", b);
+ st->hash_name = simple_hash(st->name);
+ rrdsetvar_rename_all(st);
+ }
+ else {
+ st->name = config_get(st->config_section, "name", b);
+ st->hash_name = simple_hash(st->name);
+ }
+
+ rrdset_wrlock(st);
+ RRDDIM *rd;
+ rrddim_foreach_write(rd, st)
+ rrddimvar_rename_all(rd);
+ rrdset_unlock(st);
+
+ if(unlikely(rrdset_index_add_name(host, st) != st))
+ error("RRDSET: INTERNAL ERROR: attempted to index duplicate chart name '%s'", st->name);
+
+ rrdset_flag_clear(st, RRDSET_FLAG_BACKEND_SEND);
+ rrdset_flag_clear(st, RRDSET_FLAG_BACKEND_IGNORE);
+ rrdset_flag_clear(st, RRDSET_FLAG_UPSTREAM_SEND);
+ rrdset_flag_clear(st, RRDSET_FLAG_UPSTREAM_IGNORE);
+ rrdset_flag_clear(st, RRDSET_FLAG_UPSTREAM_EXPOSED);
+
+ return 1;
+}
+
+inline void rrdset_is_obsolete(RRDSET *st) {
+ if(unlikely(!(rrdset_flag_check(st, RRDSET_FLAG_OBSOLETE)))) {
+ rrdset_flag_set(st, RRDSET_FLAG_OBSOLETE);
+ rrdset_flag_clear(st, RRDSET_FLAG_UPSTREAM_EXPOSED);
+
+ // the chart will not get more updates (data collection)
+ // so, we have to push its definition now
+ rrdset_push_chart_definition_now(st);
+ }
+}
+
+inline void rrdset_isnot_obsolete(RRDSET *st) {
+ if(unlikely((rrdset_flag_check(st, RRDSET_FLAG_OBSOLETE)))) {
+ rrdset_flag_clear(st, RRDSET_FLAG_OBSOLETE);
+ rrdset_flag_clear(st, RRDSET_FLAG_UPSTREAM_EXPOSED);
+
+ // the chart will be pushed upstream automatically
+ // due to data collection
+ }
+}
+
+inline void rrdset_update_heterogeneous_flag(RRDSET *st) {
+ RRDHOST *host = st->rrdhost;
+ (void)host;
+
+ RRDDIM *rd;
+
+ rrdset_flag_clear(st, RRDSET_FLAG_HOMEGENEOUS_CHECK);
+
+ RRD_ALGORITHM algorithm = st->dimensions->algorithm;
+ collected_number multiplier = abs(st->dimensions->multiplier);
+ collected_number divisor = abs(st->dimensions->divisor);
+
+ rrddim_foreach_read(rd, st) {
+ if(algorithm != rd->algorithm || multiplier != abs(rd->multiplier) || divisor != abs(rd->divisor)) {
+ if(!rrdset_flag_check(st, RRDSET_FLAG_HETEROGENEOUS)) {
+ #ifdef NETDATA_INTERNAL_CHECKS
+ info("Dimension '%s' added on chart '%s' of host '%s' is not homogeneous to other dimensions already present (algorithm is '%s' vs '%s', multiplier is " COLLECTED_NUMBER_FORMAT " vs " COLLECTED_NUMBER_FORMAT ", divisor is " COLLECTED_NUMBER_FORMAT " vs " COLLECTED_NUMBER_FORMAT ").",
+ rd->name,
+ st->name,
+ host->hostname,
+ rrd_algorithm_name(rd->algorithm), rrd_algorithm_name(algorithm),
+ rd->multiplier, multiplier,
+ rd->divisor, divisor
+ );
+ #endif
+ rrdset_flag_set(st, RRDSET_FLAG_HETEROGENEOUS);
+ }
+ return;
+ }
+ }
+
+ rrdset_flag_clear(st, RRDSET_FLAG_HETEROGENEOUS);
+}
+
+// ----------------------------------------------------------------------------
+// RRDSET - reset a chart
+
+void rrdset_reset(RRDSET *st) {
+ debug(D_RRD_CALLS, "rrdset_reset() %s", st->name);
+
+ st->last_collected_time.tv_sec = 0;
+ st->last_collected_time.tv_usec = 0;
+ st->last_updated.tv_sec = 0;
+ st->last_updated.tv_usec = 0;
+ st->current_entry = 0;
+ st->counter = 0;
+ st->counter_done = 0;
+
+ RRDDIM *rd;
+ rrddim_foreach_read(rd, st) {
+ rd->last_collected_time.tv_sec = 0;
+ rd->last_collected_time.tv_usec = 0;
+ rd->collections_counter = 0;
+ // memset(rd->values, 0, rd->entries * sizeof(storage_number));
+ }
+}
+
+// ----------------------------------------------------------------------------
+// RRDSET - helpers for rrdset_create()
+
+inline long align_entries_to_pagesize(RRD_MEMORY_MODE mode, long entries) {
+ if(unlikely(entries < 5)) entries = 5;
+ if(unlikely(entries > RRD_HISTORY_ENTRIES_MAX)) entries = RRD_HISTORY_ENTRIES_MAX;
+
+ if(unlikely(mode == RRD_MEMORY_MODE_NONE || mode == RRD_MEMORY_MODE_ALLOC))
+ return entries;
+
+ long page = (size_t)sysconf(_SC_PAGESIZE);
+ long size = sizeof(RRDDIM) + entries * sizeof(storage_number);
+ if(unlikely(size % page)) {
+ size -= (size % page);
+ size += page;
+
+ long n = (size - sizeof(RRDDIM)) / sizeof(storage_number);
+ return n;
+ }
+
+ return entries;
+}
+
+static inline void last_collected_time_align(RRDSET *st) {
+ st->last_collected_time.tv_sec -= st->last_collected_time.tv_sec % st->update_every;
+
+ if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_STORE_FIRST)))
+ st->last_collected_time.tv_usec = 0;
+ else
+ st->last_collected_time.tv_usec = 500000;
+}
+
+static inline void last_updated_time_align(RRDSET *st) {
+ st->last_updated.tv_sec -= st->last_updated.tv_sec % st->update_every;
+ st->last_updated.tv_usec = 0;
+}
+
+// ----------------------------------------------------------------------------
+// RRDSET - free a chart
+
+void rrdset_free(RRDSET *st) {
+ if(unlikely(!st)) return;
+
+ RRDHOST *host = st->rrdhost;
+
+ rrdhost_check_wrlock(host); // make sure we have a write lock on the host
+ rrdset_wrlock(st); // lock this RRDSET
+
+ // info("Removing chart '%s' ('%s')", st->id, st->name);
+
+ // ------------------------------------------------------------------------
+ // remove it from the indexes
+
+ if(unlikely(rrdset_index_del(host, st) != st))
+ error("RRDSET: INTERNAL ERROR: attempt to remove from index chart '%s', removed a different chart.", st->id);
+
+ rrdset_index_del_name(host, st);
+
+ // ------------------------------------------------------------------------
+ // free its children structures
+
+ while(st->variables) rrdsetvar_free(st->variables);
+ while(st->alarms) rrdsetcalc_unlink(st->alarms);
+ while(st->dimensions) rrddim_free(st, st->dimensions);
+
+ rrdfamily_free(host, st->rrdfamily);
+
+ debug(D_RRD_CALLS, "RRDSET: Cleaning up remaining chart variables for host '%s', chart '%s'", host->hostname, st->id);
+ rrdvar_free_remaining_variables(host, &st->rrdvar_root_index);
+
+ // ------------------------------------------------------------------------
+ // unlink it from the host
+
+ if(st == host->rrdset_root) {
+ host->rrdset_root = st->next;
+ }
+ else {
+ // find the previous one
+ RRDSET *s;
+ for(s = host->rrdset_root; s && s->next != st ; s = s->next) ;
+
+ // bypass it
+ if(s) s->next = st->next;
+ else error("Request to free RRDSET '%s': cannot find it under host '%s'", st->id, host->hostname);
+ }
+
+ rrdset_unlock(st);
+
+ // ------------------------------------------------------------------------
+ // free it
+
+ netdata_rwlock_destroy(&st->rrdset_rwlock);
+
+ // free directly allocated members
+ freez(st->config_section);
+ freez(st->plugin_name);
+ freez(st->module_name);
+
+ switch(st->rrd_memory_mode) {
+ case RRD_MEMORY_MODE_SAVE:
+ case RRD_MEMORY_MODE_MAP:
+ case RRD_MEMORY_MODE_RAM:
+ debug(D_RRD_CALLS, "Unmapping stats '%s'.", st->name);
+ munmap(st, st->memsize);
+ break;
+
+ case RRD_MEMORY_MODE_ALLOC:
+ case RRD_MEMORY_MODE_NONE:
+ freez(st);
+ break;
+ }
+}
+
+void rrdset_save(RRDSET *st) {
+ rrdset_check_rdlock(st);
+
+ // info("Saving chart '%s' ('%s')", st->id, st->name);
+
+ if(st->rrd_memory_mode == RRD_MEMORY_MODE_SAVE) {
+ debug(D_RRD_STATS, "Saving stats '%s' to '%s'.", st->name, st->cache_filename);
+ memory_file_save(st->cache_filename, st, st->memsize);
+ }
+
+ RRDDIM *rd;
+ rrddim_foreach_read(rd, st) {
+ if(likely(rd->rrd_memory_mode == RRD_MEMORY_MODE_SAVE)) {
+ debug(D_RRD_STATS, "Saving dimension '%s' to '%s'.", rd->name, rd->cache_filename);
+ memory_file_save(rd->cache_filename, rd, rd->memsize);
+ }
+ }
+}
+
+void rrdset_delete(RRDSET *st) {
+ RRDDIM *rd;
+
+ rrdset_check_rdlock(st);
+
+ info("Deleting chart '%s' ('%s') from disk...", st->id, st->name);
+
+ if(st->rrd_memory_mode == RRD_MEMORY_MODE_SAVE || st->rrd_memory_mode == RRD_MEMORY_MODE_MAP) {
+ info("Deleting chart header file '%s'.", st->cache_filename);
+ if(unlikely(unlink(st->cache_filename) == -1))
+ error("Cannot delete chart header file '%s'", st->cache_filename);
+ }
+
+ rrddim_foreach_read(rd, st) {
+ if(likely(rd->rrd_memory_mode == RRD_MEMORY_MODE_SAVE || rd->rrd_memory_mode == RRD_MEMORY_MODE_MAP)) {
+ info("Deleting dimension file '%s'.", rd->cache_filename);
+ if(unlikely(unlink(rd->cache_filename) == -1))
+ error("Cannot delete dimension file '%s'", rd->cache_filename);
+ }
+ }
+
+ recursively_delete_dir(st->cache_dir, "left-over chart");
+}
+
+// ----------------------------------------------------------------------------
+// RRDSET - create a chart
+
+static inline RRDSET *rrdset_find_on_create(RRDHOST *host, const char *fullid) {
+ RRDSET *st = rrdset_find(host, fullid);
+ if(unlikely(st)) {
+ rrdset_isnot_obsolete(st);
+ debug(D_RRD_CALLS, "RRDSET '%s', already exists.", fullid);
+ return st;
+ }
+
+ return NULL;
+}
+
+RRDSET *rrdset_create_custom(
+ RRDHOST *host
+ , const char *type
+ , const char *id
+ , const char *name
+ , const char *family
+ , const char *context
+ , const char *title
+ , const char *units
+ , const char *plugin
+ , const char *module
+ , long priority
+ , int update_every
+ , RRDSET_TYPE chart_type
+ , RRD_MEMORY_MODE memory_mode
+ , long history_entries
+) {
+ if(!type || !type[0]) {
+ fatal("Cannot create rrd stats without a type: id '%s', name '%s', family '%s', context '%s', title '%s', units '%s', plugin '%s', module '%s'."
+ , (id && *id)?id:"<unset>"
+ , (name && *name)?name:"<unset>"
+ , (family && *family)?family:"<unset>"
+ , (context && *context)?context:"<unset>"
+ , (title && *title)?title:"<unset>"
+ , (units && *units)?units:"<unset>"
+ , (plugin && *plugin)?plugin:"<unset>"
+ , (module && *module)?module:"<unset>"
+ );
+ return NULL;
+ }
+
+ if(!id || !id[0]) {
+ fatal("Cannot create rrd stats without an id: type '%s', name '%s', family '%s', context '%s', title '%s', units '%s', plugin '%s', module '%s'."
+ , type
+ , (name && *name)?name:"<unset>"
+ , (family && *family)?family:"<unset>"
+ , (context && *context)?context:"<unset>"
+ , (title && *title)?title:"<unset>"
+ , (units && *units)?units:"<unset>"
+ , (plugin && *plugin)?plugin:"<unset>"
+ , (module && *module)?module:"<unset>"
+ );
+ return NULL;
+ }
+
+ // ------------------------------------------------------------------------
+ // check if it already exists
+
+ char fullid[RRD_ID_LENGTH_MAX + 1];
+ snprintfz(fullid, RRD_ID_LENGTH_MAX, "%s.%s", type, id);
+
+ RRDSET *st = rrdset_find_on_create(host, fullid);
+ if(st) {
+ rrdset_flag_set(st, RRDSET_FLAG_SYNC_CLOCK);
+ rrdset_flag_clear(st, RRDSET_FLAG_UPSTREAM_EXPOSED);
+ return st;
+ }
+
+ rrdhost_wrlock(host);
+
+ st = rrdset_find_on_create(host, fullid);
+ if(st) {
+ rrdhost_unlock(host);
+ rrdset_flag_set(st, RRDSET_FLAG_SYNC_CLOCK);
+ rrdset_flag_clear(st, RRDSET_FLAG_UPSTREAM_EXPOSED);
+ return st;
+ }
+
+ char fullfilename[FILENAME_MAX + 1];
+
+ // ------------------------------------------------------------------------
+ // compose the config_section for this chart
+
+ char config_section[RRD_ID_LENGTH_MAX + 1];
+ if(host == localhost)
+ strcpy(config_section, fullid);
+ else
+ snprintfz(config_section, RRD_ID_LENGTH_MAX, "%s/%s", host->machine_guid, fullid);
+
+ // ------------------------------------------------------------------------
+ // get the options from the config, we need to create it
+
+ long rentries = config_get_number(config_section, "history", history_entries);
+ long entries = align_entries_to_pagesize(memory_mode, rentries);
+ if(entries != rentries) entries = config_set_number(config_section, "history", entries);
+
+ if(memory_mode == RRD_MEMORY_MODE_NONE && entries != rentries)
+ entries = config_set_number(config_section, "history", 10);
+
+ int enabled = config_get_boolean(config_section, "enabled", 1);
+ if(!enabled) entries = 5;
+
+ unsigned long size = sizeof(RRDSET);
+ char *cache_dir = rrdset_cache_dir(host, fullid, config_section);
+
+ time_t now = now_realtime_sec();
+
+ // ------------------------------------------------------------------------
+ // load it or allocate it
+
+ debug(D_RRD_CALLS, "Creating RRD_STATS for '%s.%s'.", type, id);
+
+ snprintfz(fullfilename, FILENAME_MAX, "%s/main.db", cache_dir);
+ if(memory_mode == RRD_MEMORY_MODE_SAVE || memory_mode == RRD_MEMORY_MODE_MAP || memory_mode == RRD_MEMORY_MODE_RAM) {
+ st = (RRDSET *) mymmap(
+ (memory_mode == RRD_MEMORY_MODE_RAM)?NULL:fullfilename
+ , size
+ , ((memory_mode == RRD_MEMORY_MODE_MAP) ? MAP_SHARED : MAP_PRIVATE)
+ , 0
+ );
+
+ if(st) {
+ memset(&st->avl, 0, sizeof(avl));
+ memset(&st->avlname, 0, sizeof(avl));
+ memset(&st->rrdvar_root_index, 0, sizeof(avl_tree_lock));
+ memset(&st->dimensions_index, 0, sizeof(avl_tree_lock));
+ memset(&st->rrdset_rwlock, 0, sizeof(netdata_rwlock_t));
+
+ st->name = NULL;
+ st->config_section = NULL;
+ st->type = NULL;
+ st->family = NULL;
+ st->title = NULL;
+ st->units = NULL;
+ st->context = NULL;
+ st->cache_dir = NULL;
+ st->plugin_name = NULL;
+ st->module_name = NULL;
+ st->dimensions = NULL;
+ st->rrdfamily = NULL;
+ st->rrdhost = NULL;
+ st->next = NULL;
+ st->variables = NULL;
+ st->alarms = NULL;
+ st->flags = 0x00000000;
+
+ if(memory_mode == RRD_MEMORY_MODE_RAM) {
+ memset(st, 0, size);
+ }
+ else {
+ if(strcmp(st->magic, RRDSET_MAGIC) != 0) {
+ info("Initializing file %s.", fullfilename);
+ memset(st, 0, size);
+ }
+ else if(strcmp(st->id, fullid) != 0) {
+ error("File %s contents are not for chart %s. Clearing it.", fullfilename, fullid);
+ // munmap(st, size);
+ // st = NULL;
+ memset(st, 0, size);
+ }
+ else if(st->memsize != size || st->entries != entries) {
+ error("File %s does not have the desired size. Clearing it.", fullfilename);
+ memset(st, 0, size);
+ }
+ else if(st->update_every != update_every) {
+ error("File %s does not have the desired update frequency. Clearing it.", fullfilename);
+ memset(st, 0, size);
+ }
+ else if((now - st->last_updated.tv_sec) > update_every * entries) {
+ error("File %s is too old. Clearing it.", fullfilename);
+ memset(st, 0, size);
+ }
+ else if(st->last_updated.tv_sec > now + update_every) {
+ error("File %s refers to the future by %zd secs. Resetting it to now.", fullfilename, (ssize_t)(st->last_updated.tv_sec - now));
+ st->last_updated.tv_sec = now;
+ }
+
+ // make sure the database is aligned
+ if(st->last_updated.tv_sec) {
+ st->update_every = update_every;
+ last_updated_time_align(st);
+ }
+ }
+
+ // make sure we have the right memory mode
+ // even if we cleared the memory
+ st->rrd_memory_mode = memory_mode;
+ }
+ }
+
+ if(unlikely(!st)) {
+ st = callocz(1, size);
+ st->rrd_memory_mode = (memory_mode == RRD_MEMORY_MODE_NONE) ? RRD_MEMORY_MODE_NONE : RRD_MEMORY_MODE_ALLOC;
+ }
+
+ st->plugin_name = plugin?strdupz(plugin):NULL;
+ st->module_name = module?strdupz(module):NULL;
+
+ st->config_section = strdupz(config_section);
+ st->rrdhost = host;
+ st->memsize = size;
+ st->entries = entries;
+ st->update_every = update_every;
+
+ if(st->current_entry >= st->entries) st->current_entry = 0;
+
+ strcpy(st->cache_filename, fullfilename);
+ strcpy(st->magic, RRDSET_MAGIC);
+
+ strcpy(st->id, fullid);
+ st->hash = simple_hash(st->id);
+
+ st->cache_dir = cache_dir;
+
+ st->chart_type = rrdset_type_id(config_get(st->config_section, "chart type", rrdset_type_name(chart_type)));
+ st->type = config_get(st->config_section, "type", type);
+
+ st->family = config_get(st->config_section, "family", family?family:st->type);
+ json_fix_string(st->family);
+
+ st->units = config_get(st->config_section, "units", units?units:"");
+ json_fix_string(st->units);
+
+ st->context = config_get(st->config_section, "context", context?context:st->id);
+ json_fix_string(st->context);
+ st->hash_context = simple_hash(st->context);
+
+ st->priority = config_get_number(st->config_section, "priority", priority);
+ if(enabled)
+ rrdset_flag_set(st, RRDSET_FLAG_ENABLED);
+ else
+ rrdset_flag_clear(st, RRDSET_FLAG_ENABLED);
+
+ rrdset_flag_clear(st, RRDSET_FLAG_DETAIL);
+ rrdset_flag_clear(st, RRDSET_FLAG_DEBUG);
+ rrdset_flag_clear(st, RRDSET_FLAG_OBSOLETE);
+ rrdset_flag_clear(st, RRDSET_FLAG_BACKEND_SEND);
+ rrdset_flag_clear(st, RRDSET_FLAG_BACKEND_IGNORE);
+ rrdset_flag_clear(st, RRDSET_FLAG_UPSTREAM_SEND);
+ rrdset_flag_clear(st, RRDSET_FLAG_UPSTREAM_IGNORE);
+ rrdset_flag_clear(st, RRDSET_FLAG_UPSTREAM_EXPOSED);
+ rrdset_flag_set(st, RRDSET_FLAG_SYNC_CLOCK);
+
+ // if(!strcmp(st->id, "disk_util.dm-0")) {
+ // st->debug = 1;
+ // error("enabled debugging for '%s'", st->id);
+ // }
+ // else error("not enabled debugging for '%s'", st->id);
+
+ st->green = NAN;
+ st->red = NAN;
+
+ st->last_collected_time.tv_sec = 0;
+ st->last_collected_time.tv_usec = 0;
+ st->counter_done = 0;
+
+ st->gap_when_lost_iterations_above = (int) (gap_when_lost_iterations_above + 2);
+
+ st->last_accessed_time = 0;
+ st->upstream_resync_time = 0;
+
+ avl_init_lock(&st->dimensions_index, rrddim_compare);
+ avl_init_lock(&st->rrdvar_root_index, rrdvar_compare);
+
+ netdata_rwlock_init(&st->rrdset_rwlock);
+
+ if(name && *name && rrdset_set_name(st, name))
+ // we did set the name
+ ;
+ else
+ // could not use the name, use the id
+ rrdset_set_name(st, id);
+
+ st->title = config_get(st->config_section, "title", title);
+ json_fix_string(st->title);
+
+ st->rrdfamily = rrdfamily_create(host, st->family);
+
+ st->next = host->rrdset_root;
+ host->rrdset_root = st;
+
+ if(host->health_enabled) {
+ rrdsetvar_create(st, "last_collected_t", RRDVAR_TYPE_TIME_T, &st->last_collected_time.tv_sec, RRDVAR_OPTION_DEFAULT);
+ rrdsetvar_create(st, "collected_total_raw", RRDVAR_TYPE_TOTAL, &st->last_collected_total, RRDVAR_OPTION_DEFAULT);
+ rrdsetvar_create(st, "green", RRDVAR_TYPE_CALCULATED, &st->green, RRDVAR_OPTION_DEFAULT);
+ rrdsetvar_create(st, "red", RRDVAR_TYPE_CALCULATED, &st->red, RRDVAR_OPTION_DEFAULT);
+ rrdsetvar_create(st, "update_every", RRDVAR_TYPE_INT, &st->update_every, RRDVAR_OPTION_DEFAULT);
+ }
+
+ if(unlikely(rrdset_index_add(host, st) != st))
+ error("RRDSET: INTERNAL ERROR: attempt to index duplicate chart '%s'", st->id);
+
+ rrdsetcalc_link_matching(st);
+ rrdcalctemplate_link_matching(st);
+
+ rrdhost_cleanup_obsolete_charts(host);
+
+ rrdhost_unlock(host);
+
+ return(st);
+}
+
+
+// ----------------------------------------------------------------------------
+// RRDSET - data collection iteration control
+
+inline void rrdset_next_usec_unfiltered(RRDSET *st, usec_t microseconds) {
+ if(unlikely(!st->last_collected_time.tv_sec || !microseconds || (rrdset_flag_check_noatomic(st, RRDSET_FLAG_SYNC_CLOCK)))) {
+ // call the full next_usec() function
+ rrdset_next_usec(st, microseconds);
+ return;
+ }
+
+ st->usec_since_last_update = microseconds;
+}
+
+inline void rrdset_next_usec(RRDSET *st, usec_t microseconds) {
+ struct timeval now;
+ now_realtime_timeval(&now);
+
+ #ifdef NETDATA_INTERNAL_CHECKS
+ char *discard_reason = NULL;
+ usec_t discarded = microseconds;
+ #endif
+
+ if(unlikely(rrdset_flag_check_noatomic(st, RRDSET_FLAG_SYNC_CLOCK))) {
+ // the chart needs to be re-synced to current time
+ rrdset_flag_clear(st, RRDSET_FLAG_SYNC_CLOCK);
+
+ // discard the microseconds supplied
+ microseconds = 0;
+
+ #ifdef NETDATA_INTERNAL_CHECKS
+ if(!discard_reason) discard_reason = "SYNC CLOCK FLAG";
+ #endif
+ }
+
+ if(unlikely(!st->last_collected_time.tv_sec)) {
+ // the first entry
+ microseconds = st->update_every * USEC_PER_SEC;
+ #ifdef NETDATA_INTERNAL_CHECKS
+ if(!discard_reason) discard_reason = "FIRST DATA COLLECTION";
+ #endif
+ }
+ else if(unlikely(!microseconds)) {
+ // no dt given by the plugin
+ microseconds = dt_usec(&now, &st->last_collected_time);
+ #ifdef NETDATA_INTERNAL_CHECKS
+ if(!discard_reason) discard_reason = "NO USEC GIVEN BY COLLECTOR";
+ #endif
+ }
+ else {
+ // microseconds has the time since the last collection
+ susec_t since_last_usec = dt_usec_signed(&now, &st->last_collected_time);
+
+ if(unlikely(since_last_usec < 0)) {
+ // oops! the database is in the future
+ info("RRD database for chart '%s' on host '%s' is %0.5" LONG_DOUBLE_MODIFIER " secs in the future (counter #%zu, update #%zu). Adjusting it to current time.", st->id, st->rrdhost->hostname, (LONG_DOUBLE)-since_last_usec / USEC_PER_SEC, st->counter, st->counter_done);
+
+ st->last_collected_time.tv_sec = now.tv_sec - st->update_every;
+ st->last_collected_time.tv_usec = now.tv_usec;
+ last_collected_time_align(st);
+
+ st->last_updated.tv_sec = now.tv_sec - st->update_every;
+ st->last_updated.tv_usec = now.tv_usec;
+ last_updated_time_align(st);
+
+ microseconds = st->update_every * USEC_PER_SEC;
+ #ifdef NETDATA_INTERNAL_CHECKS
+ if(!discard_reason) discard_reason = "COLLECTION TIME IN FUTURE";
+ #endif
+ }
+ else if(unlikely((usec_t)since_last_usec > (usec_t)(st->update_every * 5 * USEC_PER_SEC))) {
+ // oops! the database is too far behind
+ info("RRD database for chart '%s' on host '%s' is %0.5" LONG_DOUBLE_MODIFIER " secs in the past (counter #%zu, update #%zu). Adjusting it to current time.", st->id, st->rrdhost->hostname, (LONG_DOUBLE)since_last_usec / USEC_PER_SEC, st->counter, st->counter_done);
+
+ microseconds = (usec_t)since_last_usec;
+ #ifdef NETDATA_INTERNAL_CHECKS
+ if(!discard_reason) discard_reason = "COLLECTION TIME TOO FAR IN THE PAST";
+ #endif
+ }
+
+#ifdef NETDATA_INTERNAL_CHECKS
+ if(since_last_usec > 0 && (susec_t)microseconds < since_last_usec) {
+ static __thread susec_t min_delta = USEC_PER_SEC * 3600, permanent_min_delta = 0;
+ static __thread time_t last_t = 0;
+
+ // the first time initialize it so that it will make the check later
+ if(last_t == 0) last_t = now.tv_sec + 60;
+
+ susec_t delta = since_last_usec - (susec_t)microseconds;
+ if(delta < min_delta) min_delta = delta;
+
+ if(now.tv_sec >= last_t + 60) {
+ last_t = now.tv_sec;
+
+ if(min_delta > permanent_min_delta) {
+ info("MINIMUM MICROSECONDS DELTA of thread %d increased from %lld to %lld (+%lld)", gettid(), permanent_min_delta, min_delta, min_delta - permanent_min_delta);
+ permanent_min_delta = min_delta;
+ }
+
+ min_delta = USEC_PER_SEC * 3600;
+ }
+ }
+#endif
+ }
+
+ #ifdef NETDATA_INTERNAL_CHECKS
+ debug(D_RRD_CALLS, "rrdset_next_usec() for chart %s with microseconds %llu", st->name, microseconds);
+ rrdset_debug(st, "NEXT: %llu microseconds", microseconds);
+
+ if(discarded && discarded != microseconds)
+ info("host '%s', chart '%s': discarded data collection time of %llu usec, replaced with %llu usec, reason: '%s'", st->rrdhost->hostname, st->id, discarded, microseconds, discard_reason?discard_reason:"UNDEFINED");
+
+ #endif
+
+ st->usec_since_last_update = microseconds;
+}
+
+
+// ----------------------------------------------------------------------------
+// RRDSET - process the collected values for all dimensions of a chart
+
+static inline usec_t rrdset_init_last_collected_time(RRDSET *st) {
+ now_realtime_timeval(&st->last_collected_time);
+ last_collected_time_align(st);
+
+ usec_t last_collect_ut = st->last_collected_time.tv_sec * USEC_PER_SEC + st->last_collected_time.tv_usec;
+
+ #ifdef NETDATA_INTERNAL_CHECKS
+ rrdset_debug(st, "initialized last collected time to %0.3" LONG_DOUBLE_MODIFIER, (LONG_DOUBLE)last_collect_ut / USEC_PER_SEC);
+ #endif
+
+ return last_collect_ut;
+}
+
+static inline usec_t rrdset_update_last_collected_time(RRDSET *st) {
+ usec_t last_collect_ut = st->last_collected_time.tv_sec * USEC_PER_SEC + st->last_collected_time.tv_usec;
+ usec_t ut = last_collect_ut + st->usec_since_last_update;
+ st->last_collected_time.tv_sec = (time_t) (ut / USEC_PER_SEC);
+ st->last_collected_time.tv_usec = (suseconds_t) (ut % USEC_PER_SEC);
+
+ #ifdef NETDATA_INTERNAL_CHECKS
+ rrdset_debug(st, "updated last collected time to %0.3" LONG_DOUBLE_MODIFIER, (LONG_DOUBLE)last_collect_ut / USEC_PER_SEC);
+ #endif
+
+ return last_collect_ut;
+}
+
+static inline usec_t rrdset_init_last_updated_time(RRDSET *st) {
+ // copy the last collected time to last updated time
+ st->last_updated.tv_sec = st->last_collected_time.tv_sec;
+ st->last_updated.tv_usec = st->last_collected_time.tv_usec;
+
+ if(rrdset_flag_check(st, RRDSET_FLAG_STORE_FIRST))
+ st->last_updated.tv_sec -= st->update_every;
+
+ last_updated_time_align(st);
+
+ usec_t last_updated_ut = st->last_updated.tv_sec * USEC_PER_SEC + st->last_updated.tv_usec;
+
+ #ifdef NETDATA_INTERNAL_CHECKS
+ rrdset_debug(st, "initialized last updated time to %0.3" LONG_DOUBLE_MODIFIER, (LONG_DOUBLE)last_updated_ut / USEC_PER_SEC);
+ #endif
+
+ return last_updated_ut;
+}
+
+static inline void rrdset_done_push_exclusive(RRDSET *st) {
+// usec_t update_every_ut = st->update_every * USEC_PER_SEC; // st->update_every in microseconds
+//
+// if(unlikely(st->usec_since_last_update > update_every_ut * remote_clock_resync_iterations)) {
+// error("Chart '%s' was last collected %llu usec before. Resetting it.", st->id, st->usec_since_last_update);
+// rrdset_reset(st);
+// st->usec_since_last_update = update_every_ut;
+// }
+
+ if(unlikely(!st->last_collected_time.tv_sec)) {
+ // it is the first entry
+ // set the last_collected_time to now
+ rrdset_init_last_collected_time(st);
+ }
+ else {
+ // it is not the first entry
+ // calculate the proper last_collected_time, using usec_since_last_update
+ rrdset_update_last_collected_time(st);
+ }
+
+ st->counter_done++;
+
+ rrdset_rdlock(st);
+ rrdset_done_push(st);
+ rrdset_unlock(st);
+}
+
+
+static inline size_t rrdset_done_interpolate(
+ RRDSET *st
+ , usec_t update_every_ut
+ , usec_t last_stored_ut
+ , usec_t next_store_ut
+ , usec_t last_collect_ut
+ , usec_t now_collect_ut
+ , char store_this_entry
+ , uint32_t storage_flags
+) {
+ RRDDIM *rd;
+
+ size_t stored_entries = 0; // the number of entries we have stored in the db, during this call to rrdset_done()
+
+ usec_t first_ut = last_stored_ut, last_ut = 0;
+ (void)first_ut;
+
+ ssize_t iterations = (ssize_t)((now_collect_ut - last_stored_ut) / (update_every_ut));
+ if((now_collect_ut % (update_every_ut)) == 0) iterations++;
+
+ size_t counter = st->counter;
+ long current_entry = st->current_entry;
+
+ for( ; next_store_ut <= now_collect_ut ; last_collect_ut = next_store_ut, next_store_ut += update_every_ut, iterations-- ) {
+
+ #ifdef NETDATA_INTERNAL_CHECKS
+ if(iterations < 0) { error("INTERNAL CHECK: %s: iterations calculation wrapped! first_ut = %llu, last_stored_ut = %llu, next_store_ut = %llu, now_collect_ut = %llu", st->name, first_ut, last_stored_ut, next_store_ut, now_collect_ut); }
+ rrdset_debug(st, "last_stored_ut = %0.3" LONG_DOUBLE_MODIFIER " (last updated time)", (LONG_DOUBLE)last_stored_ut/USEC_PER_SEC);
+ rrdset_debug(st, "next_store_ut = %0.3" LONG_DOUBLE_MODIFIER " (next interpolation point)", (LONG_DOUBLE)next_store_ut/USEC_PER_SEC);
+ #endif
+
+ last_ut = next_store_ut;
+
+ rrddim_foreach_read(rd, st) {
+ calculated_number new_value;
+
+ switch(rd->algorithm) {
+ case RRD_ALGORITHM_INCREMENTAL:
+ new_value = (calculated_number)
+ ( rd->calculated_value
+ * (calculated_number)(next_store_ut - last_collect_ut)
+ / (calculated_number)(now_collect_ut - last_collect_ut)
+ );
+
+ #ifdef NETDATA_INTERNAL_CHECKS
+ rrdset_debug(st, "%s: CALC2 INC "
+ CALCULATED_NUMBER_FORMAT " = "
+ CALCULATED_NUMBER_FORMAT
+ " * (%llu - %llu)"
+ " / (%llu - %llu)"
+ , rd->name
+ , new_value
+ , rd->calculated_value
+ , next_store_ut, last_collect_ut
+ , now_collect_ut, last_collect_ut
+ );
+ #endif
+
+ rd->calculated_value -= new_value;
+ new_value += rd->last_calculated_value;
+ rd->last_calculated_value = 0;
+ new_value /= (calculated_number)st->update_every;
+
+ if(unlikely(next_store_ut - last_stored_ut < update_every_ut)) {
+
+ #ifdef NETDATA_INTERNAL_CHECKS
+ rrdset_debug(st, "%s: COLLECTION POINT IS SHORT " CALCULATED_NUMBER_FORMAT " - EXTRAPOLATING",
+ rd->name
+ , (calculated_number)(next_store_ut - last_stored_ut)
+ );
+ #endif
+
+ new_value = new_value * (calculated_number)(st->update_every * USEC_PER_SEC) / (calculated_number)(next_store_ut - last_stored_ut);
+ }
+ break;
+
+ case RRD_ALGORITHM_ABSOLUTE:
+ case RRD_ALGORITHM_PCENT_OVER_ROW_TOTAL:
+ case RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL:
+ default:
+ if(iterations == 1) {
+ // this is the last iteration
+ // do not interpolate
+ // just show the calculated value
+
+ new_value = rd->calculated_value;
+ }
+ else {
+ // we have missed an update
+ // interpolate in the middle values
+
+ new_value = (calculated_number)
+ ( ( (rd->calculated_value - rd->last_calculated_value)
+ * (calculated_number)(next_store_ut - last_collect_ut)
+ / (calculated_number)(now_collect_ut - last_collect_ut)
+ )
+ + rd->last_calculated_value
+ );
+
+ #ifdef NETDATA_INTERNAL_CHECKS
+ rrdset_debug(st, "%s: CALC2 DEF "
+ CALCULATED_NUMBER_FORMAT " = ((("
+ "(" CALCULATED_NUMBER_FORMAT " - " CALCULATED_NUMBER_FORMAT ")"
+ " * %llu"
+ " / %llu) + " CALCULATED_NUMBER_FORMAT
+ , rd->name
+ , new_value
+ , rd->calculated_value, rd->last_calculated_value
+ , (next_store_ut - first_ut)
+ , (now_collect_ut - first_ut), rd->last_calculated_value
+ );
+ #endif
+ }
+ break;
+ }
+
+ if(unlikely(!store_this_entry)) {
+ rd->values[current_entry] = SN_EMPTY_SLOT; //pack_storage_number(0, SN_NOT_EXISTS);
+ continue;
+ }
+
+ if(likely(rd->updated && rd->collections_counter > 1 && iterations < st->gap_when_lost_iterations_above)) {
+ rd->values[current_entry] = pack_storage_number(new_value, storage_flags );
+ rd->last_stored_value = new_value;
+
+ #ifdef NETDATA_INTERNAL_CHECKS
+ rrdset_debug(st, "%s: STORE[%ld] "
+ CALCULATED_NUMBER_FORMAT " = " CALCULATED_NUMBER_FORMAT
+ , rd->name
+ , current_entry
+ , unpack_storage_number(rd->values[current_entry]), new_value
+ );
+ #endif
+
+ }
+ else {
+
+ #ifdef NETDATA_INTERNAL_CHECKS
+ rrdset_debug(st, "%s: STORE[%ld] = NON EXISTING "
+ , rd->name
+ , current_entry
+ );
+ #endif
+
+ rd->values[current_entry] = SN_EMPTY_SLOT; // pack_storage_number(0, SN_NOT_EXISTS);
+ rd->last_stored_value = NAN;
+ }
+
+ stored_entries++;
+
+ #ifdef NETDATA_INTERNAL_CHECKS
+ if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG))) {
+ calculated_number t1 = new_value * (calculated_number)rd->multiplier / (calculated_number)rd->divisor;
+ calculated_number t2 = unpack_storage_number(rd->values[current_entry]);
+
+ calculated_number accuracy = accuracy_loss(t1, t2);
+ debug(D_RRD_STATS, "%s/%s: UNPACK[%ld] = " CALCULATED_NUMBER_FORMAT " FLAGS=0x%08x (original = " CALCULATED_NUMBER_FORMAT ", accuracy loss = " CALCULATED_NUMBER_FORMAT "%%%s)"
+ , st->id, rd->name
+ , current_entry
+ , t2
+ , get_storage_number_flags(rd->values[current_entry])
+ , t1
+ , accuracy
+ , (accuracy > ACCURACY_LOSS_ACCEPTED_PERCENT) ? " **TOO BIG** " : ""
+ );
+
+ rd->collected_volume += t1;
+ rd->stored_volume += t2;
+
+ accuracy = accuracy_loss(rd->collected_volume, rd->stored_volume);
+ debug(D_RRD_STATS, "%s/%s: VOLUME[%ld] = " CALCULATED_NUMBER_FORMAT ", calculated = " CALCULATED_NUMBER_FORMAT ", accuracy loss = " CALCULATED_NUMBER_FORMAT "%%%s"
+ , st->id, rd->name
+ , current_entry
+ , rd->stored_volume
+ , rd->collected_volume
+ , accuracy
+ , (accuracy > ACCURACY_LOSS_ACCEPTED_PERCENT) ? " **TOO BIG** " : ""
+ );
+ }
+ #endif
+ }
+ // reset the storage flags for the next point, if any;
+ storage_flags = SN_EXISTS;
+
+ counter++;
+ current_entry = ((current_entry + 1) >= st->entries) ? 0 : current_entry + 1;
+ last_stored_ut = next_store_ut;
+ }
+
+ st->counter = counter;
+ st->current_entry = current_entry;
+
+ if(likely(last_ut)) {
+ st->last_updated.tv_sec = (time_t) (last_ut / USEC_PER_SEC);
+ st->last_updated.tv_usec = 0;
+ }
+
+ return stored_entries;
+}
+
+static inline void rrdset_done_fill_the_gap(RRDSET *st) {
+ usec_t update_every_ut = st->update_every * USEC_PER_SEC;
+ usec_t now_collect_ut = st->last_collected_time.tv_sec * USEC_PER_SEC + st->last_collected_time.tv_usec;
+
+ long c = 0, entries = st->entries;
+ RRDDIM *rd;
+ rrddim_foreach_read(rd, st) {
+ usec_t next_store_ut = (st->last_updated.tv_sec + st->update_every) * USEC_PER_SEC;
+ long current_entry = st->current_entry;
+
+ for(c = 0; c < entries && next_store_ut <= now_collect_ut ; next_store_ut += update_every_ut, c++) {
+ rd->values[current_entry] = SN_EMPTY_SLOT;
+ current_entry = ((current_entry + 1) >= entries) ? 0 : current_entry + 1;
+
+ #ifdef NETDATA_INTERNAL_CHECKS
+ rrdset_debug(st, "%s: STORE[%ld] = NON EXISTING (FILLED THE GAP)", rd->name, current_entry);
+ #endif
+ }
+ }
+
+ if(c > 0) {
+ c--;
+ st->last_updated.tv_sec += c * st->update_every;
+
+ st->current_entry += c;
+ if(st->current_entry >= st->entries)
+ st->current_entry -= st->entries;
+ }
+}
+
+void rrdset_done(RRDSET *st) {
+ if(unlikely(netdata_exit)) return;
+
+ if(unlikely(st->rrd_memory_mode == RRD_MEMORY_MODE_NONE)) {
+ if(unlikely(st->rrdhost->rrdpush_send_enabled))
+ rrdset_done_push_exclusive(st);
+
+ return;
+ }
+
+ debug(D_RRD_CALLS, "rrdset_done() for chart %s", st->name);
+
+ RRDDIM *rd;
+
+ char
+ store_this_entry = 1, // boolean: 1 = store this entry, 0 = don't store this entry
+ first_entry = 0; // boolean: 1 = this is the first entry seen for this chart, 0 = all other entries
+
+ usec_t
+ last_collect_ut, // the timestamp in microseconds, of the last collected value
+ now_collect_ut, // the timestamp in microseconds, of this collected value (this is NOW)
+ last_stored_ut, // the timestamp in microseconds, of the last stored entry in the db
+ next_store_ut, // the timestamp in microseconds, of the next entry to store in the db
+ update_every_ut = st->update_every * USEC_PER_SEC; // st->update_every in microseconds
+
+ netdata_thread_disable_cancelability();
+
+ // a read lock is OK here
+ rrdset_rdlock(st);
+
+ if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_OBSOLETE))) {
+ error("Chart '%s' has the OBSOLETE flag set, but it is collected.", st->id);
+ rrdset_isnot_obsolete(st);
+ }
+
+ // check if the chart has a long time to be updated
+ if(unlikely(st->usec_since_last_update > st->entries * update_every_ut)) {
+ info("host '%s', chart %s: took too long to be updated (counter #%zu, update #%zu, %0.3" LONG_DOUBLE_MODIFIER " secs). Resetting it.", st->rrdhost->hostname, st->name, st->counter, st->counter_done, (LONG_DOUBLE)st->usec_since_last_update / USEC_PER_SEC);
+ rrdset_reset(st);
+ st->usec_since_last_update = update_every_ut;
+ store_this_entry = 0;
+ first_entry = 1;
+ }
+
+ #ifdef NETDATA_INTERNAL_CHECKS
+ rrdset_debug(st, "microseconds since last update: %llu", st->usec_since_last_update);
+ #endif
+
+ // set last_collected_time
+ if(unlikely(!st->last_collected_time.tv_sec)) {
+ // it is the first entry
+ // set the last_collected_time to now
+ last_collect_ut = rrdset_init_last_collected_time(st) - update_every_ut;
+
+ // the first entry should not be stored
+ store_this_entry = 0;
+ first_entry = 1;
+ }
+ else {
+ // it is not the first entry
+ // calculate the proper last_collected_time, using usec_since_last_update
+ last_collect_ut = rrdset_update_last_collected_time(st);
+ }
+
+ // if this set has not been updated in the past
+ // we fake the last_update time to be = now - usec_since_last_update
+ if(unlikely(!st->last_updated.tv_sec)) {
+ // it has never been updated before
+ // set a fake last_updated, in the past using usec_since_last_update
+ rrdset_init_last_updated_time(st);
+
+ // the first entry should not be stored
+ store_this_entry = 0;
+ first_entry = 1;
+ }
+
+ // check if we will re-write the entire data set
+ if(unlikely(dt_usec(&st->last_collected_time, &st->last_updated) > st->entries * update_every_ut)) {
+ info("%s: too old data (last updated at %ld.%ld, last collected at %ld.%ld). Resetting it. Will not store the next entry.", st->name, st->last_updated.tv_sec, st->last_updated.tv_usec, st->last_collected_time.tv_sec, st->last_collected_time.tv_usec);
+ rrdset_reset(st);
+ rrdset_init_last_updated_time(st);
+
+ st->usec_since_last_update = update_every_ut;
+
+ // the first entry should not be stored
+ store_this_entry = 0;
+ first_entry = 1;
+ }
+
+ // these are the 3 variables that will help us in interpolation
+ // last_stored_ut = the last time we added a value to the storage
+ // now_collect_ut = the time the current value has been collected
+ // next_store_ut = the time of the next interpolation point
+ now_collect_ut = st->last_collected_time.tv_sec * USEC_PER_SEC + st->last_collected_time.tv_usec;
+ last_stored_ut = st->last_updated.tv_sec * USEC_PER_SEC + st->last_updated.tv_usec;
+ next_store_ut = (st->last_updated.tv_sec + st->update_every) * USEC_PER_SEC;
+
+ if(unlikely(!st->counter_done)) {
+ // if we have not collected metrics this session (st->counter_done == 0)
+ // and we have collected metrics for this chart in the past (st->counter != 0)
+ // fill the gap (the chart has been just loaded from disk)
+ if(unlikely(st->counter)) {
+ rrdset_done_fill_the_gap(st);
+ last_stored_ut = st->last_updated.tv_sec * USEC_PER_SEC + st->last_updated.tv_usec;
+ next_store_ut = (st->last_updated.tv_sec + st->update_every) * USEC_PER_SEC;
+ }
+
+ if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_STORE_FIRST))) {
+ store_this_entry = 1;
+ last_collect_ut = next_store_ut - update_every_ut;
+
+ #ifdef NETDATA_INTERNAL_CHECKS
+ rrdset_debug(st, "Fixed first entry.");
+ #endif
+ }
+ else {
+ store_this_entry = 0;
+
+ #ifdef NETDATA_INTERNAL_CHECKS
+ rrdset_debug(st, "Will not store the next entry.");
+ #endif
+ }
+ }
+ st->counter_done++;
+
+ if(unlikely(st->rrdhost->rrdpush_send_enabled))
+ rrdset_done_push(st);
+
+ #ifdef NETDATA_INTERNAL_CHECKS
+ rrdset_debug(st, "last_collect_ut = %0.3" LONG_DOUBLE_MODIFIER " (last collection time)", (LONG_DOUBLE)last_collect_ut/USEC_PER_SEC);
+ rrdset_debug(st, "now_collect_ut = %0.3" LONG_DOUBLE_MODIFIER " (current collection time)", (LONG_DOUBLE)now_collect_ut/USEC_PER_SEC);
+ rrdset_debug(st, "last_stored_ut = %0.3" LONG_DOUBLE_MODIFIER " (last updated time)", (LONG_DOUBLE)last_stored_ut/USEC_PER_SEC);
+ rrdset_debug(st, "next_store_ut = %0.3" LONG_DOUBLE_MODIFIER " (next interpolation point)", (LONG_DOUBLE)next_store_ut/USEC_PER_SEC);
+ #endif
+
+ // calculate totals and count the dimensions
+ int dimensions = 0;
+ st->collected_total = 0;
+ rrddim_foreach_read(rd, st) {
+ dimensions++;
+ if(likely(rd->updated))
+ st->collected_total += rd->collected_value;
+ }
+
+ uint32_t storage_flags = SN_EXISTS;
+
+ // process all dimensions to calculate their values
+ // based on the collected figures only
+ // at this stage we do not interpolate anything
+ rrddim_foreach_read(rd, st) {
+
+ if(unlikely(!rd->updated)) {
+ rd->calculated_value = 0;
+ continue;
+ }
+
+ #ifdef NETDATA_INTERNAL_CHECKS
+ rrdset_debug(st, "%s: START "
+ " last_collected_value = " COLLECTED_NUMBER_FORMAT
+ " collected_value = " COLLECTED_NUMBER_FORMAT
+ " last_calculated_value = " CALCULATED_NUMBER_FORMAT
+ " calculated_value = " CALCULATED_NUMBER_FORMAT
+ , rd->name
+ , rd->last_collected_value
+ , rd->collected_value
+ , rd->last_calculated_value
+ , rd->calculated_value
+ );
+ #endif
+
+ switch(rd->algorithm) {
+ case RRD_ALGORITHM_ABSOLUTE:
+ rd->calculated_value = (calculated_number)rd->collected_value
+ * (calculated_number)rd->multiplier
+ / (calculated_number)rd->divisor;
+
+ #ifdef NETDATA_INTERNAL_CHECKS
+ rrdset_debug(st, "%s: CALC ABS/ABS-NO-IN "
+ CALCULATED_NUMBER_FORMAT " = "
+ COLLECTED_NUMBER_FORMAT
+ " * " CALCULATED_NUMBER_FORMAT
+ " / " CALCULATED_NUMBER_FORMAT
+ , rd->name
+ , rd->calculated_value
+ , rd->collected_value
+ , (calculated_number)rd->multiplier
+ , (calculated_number)rd->divisor
+ );
+ #endif
+
+ break;
+
+ case RRD_ALGORITHM_PCENT_OVER_ROW_TOTAL:
+ if(unlikely(!st->collected_total))
+ rd->calculated_value = 0;
+ else
+ // the percentage of the current value
+ // over the total of all dimensions
+ rd->calculated_value =
+ (calculated_number)100
+ * (calculated_number)rd->collected_value
+ / (calculated_number)st->collected_total;
+
+ #ifdef NETDATA_INTERNAL_CHECKS
+ rrdset_debug(st, "%s: CALC PCENT-ROW "
+ CALCULATED_NUMBER_FORMAT " = 100"
+ " * " COLLECTED_NUMBER_FORMAT
+ " / " COLLECTED_NUMBER_FORMAT
+ , rd->name
+ , rd->calculated_value
+ , rd->collected_value
+ , st->collected_total
+ );
+ #endif
+
+ break;
+
+ case RRD_ALGORITHM_INCREMENTAL:
+ if(unlikely(rd->collections_counter <= 1)) {
+ rd->calculated_value = 0;
+ continue;
+ }
+
+ // if the new is smaller than the old (an overflow, or reset), set the old equal to the new
+ // to reset the calculation (it will give zero as the calculation for this second)
+ if(unlikely(rd->last_collected_value > rd->collected_value)) {
+ debug(D_RRD_STATS, "%s.%s: RESET or OVERFLOW. Last collected value = " COLLECTED_NUMBER_FORMAT ", current = " COLLECTED_NUMBER_FORMAT
+ , st->name, rd->name
+ , rd->last_collected_value
+ , rd->collected_value);
+
+ if(!(rrddim_flag_check(rd, RRDDIM_FLAG_DONT_DETECT_RESETS_OR_OVERFLOWS)))
+ storage_flags = SN_EXISTS_RESET;
+
+ uint64_t last = (uint64_t)rd->last_collected_value;
+ uint64_t new = (uint64_t)rd->collected_value;
+ uint64_t max = (uint64_t)rd->collected_value_max;
+ uint64_t cap = 0;
+
+ if(max > 0x00000000FFFFFFFFULL) cap = 0xFFFFFFFFFFFFFFFFULL;
+ else if(max > 0x000000000000FFFFULL) cap = 0x00000000FFFFFFFFULL;
+ else if(max > 0x00000000000000FFULL) cap = 0x000000000000FFFFULL;
+ else cap = 0x00000000000000FFULL;
+
+ uint64_t delta = cap - last + new;
+
+ rd->calculated_value +=
+ (calculated_number) delta
+ * (calculated_number) rd->multiplier
+ / (calculated_number) rd->divisor;
+ }
+ else {
+ rd->calculated_value +=
+ (calculated_number) (rd->collected_value - rd->last_collected_value)
+ * (calculated_number) rd->multiplier
+ / (calculated_number) rd->divisor;
+ }
+
+ #ifdef NETDATA_INTERNAL_CHECKS
+ rrdset_debug(st, "%s: CALC INC PRE "
+ CALCULATED_NUMBER_FORMAT " = ("
+ COLLECTED_NUMBER_FORMAT " - " COLLECTED_NUMBER_FORMAT
+ ")"
+ " * " CALCULATED_NUMBER_FORMAT
+ " / " CALCULATED_NUMBER_FORMAT
+ , rd->name
+ , rd->calculated_value
+ , rd->collected_value, rd->last_collected_value
+ , (calculated_number)rd->multiplier
+ , (calculated_number)rd->divisor
+ );
+ #endif
+
+ break;
+
+ case RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL:
+ if(unlikely(rd->collections_counter <= 1)) {
+ rd->calculated_value = 0;
+ continue;
+ }
+
+ // if the new is smaller than the old (an overflow, or reset), set the old equal to the new
+ // to reset the calculation (it will give zero as the calculation for this second)
+ if(unlikely(rd->last_collected_value > rd->collected_value)) {
+ debug(D_RRD_STATS, "%s.%s: RESET or OVERFLOW. Last collected value = " COLLECTED_NUMBER_FORMAT ", current = " COLLECTED_NUMBER_FORMAT
+ , st->name, rd->name
+ , rd->last_collected_value
+ , rd->collected_value
+ );
+
+ if(!(rrddim_flag_check(rd, RRDDIM_FLAG_DONT_DETECT_RESETS_OR_OVERFLOWS)))
+ storage_flags = SN_EXISTS_RESET;
+
+ rd->last_collected_value = rd->collected_value;
+ }
+
+ // the percentage of the current increment
+ // over the increment of all dimensions together
+ if(unlikely(st->collected_total == st->last_collected_total))
+ rd->calculated_value = 0;
+ else
+ rd->calculated_value =
+ (calculated_number)100
+ * (calculated_number)(rd->collected_value - rd->last_collected_value)
+ / (calculated_number)(st->collected_total - st->last_collected_total);
+
+ #ifdef NETDATA_INTERNAL_CHECKS
+ rrdset_debug(st, "%s: CALC PCENT-DIFF "
+ CALCULATED_NUMBER_FORMAT " = 100"
+ " * (" COLLECTED_NUMBER_FORMAT " - " COLLECTED_NUMBER_FORMAT ")"
+ " / (" COLLECTED_NUMBER_FORMAT " - " COLLECTED_NUMBER_FORMAT ")"
+ , rd->name
+ , rd->calculated_value
+ , rd->collected_value, rd->last_collected_value
+ , st->collected_total, st->last_collected_total
+ );
+ #endif
+
+ break;
+
+ default:
+ // make the default zero, to make sure
+ // it gets noticed when we add new types
+ rd->calculated_value = 0;
+
+ #ifdef NETDATA_INTERNAL_CHECKS
+ rrdset_debug(st, "%s: CALC "
+ CALCULATED_NUMBER_FORMAT " = 0"
+ , rd->name
+ , rd->calculated_value
+ );
+ #endif
+
+ break;
+ }
+
+ #ifdef NETDATA_INTERNAL_CHECKS
+ rrdset_debug(st, "%s: PHASE2 "
+ " last_collected_value = " COLLECTED_NUMBER_FORMAT
+ " collected_value = " COLLECTED_NUMBER_FORMAT
+ " last_calculated_value = " CALCULATED_NUMBER_FORMAT
+ " calculated_value = " CALCULATED_NUMBER_FORMAT
+ , rd->name
+ , rd->last_collected_value
+ , rd->collected_value
+ , rd->last_calculated_value
+ , rd->calculated_value
+ );
+ #endif
+
+ }
+
+ // at this point we have all the calculated values ready
+ // it is now time to interpolate values on a second boundary
+
+#ifdef NETDATA_INTERNAL_CHECKS
+ if(unlikely(now_collect_ut < next_store_ut)) {
+ // this is collected in the same interpolation point
+ rrdset_debug(st, "THIS IS IN THE SAME INTERPOLATION POINT");
+ info("INTERNAL CHECK: host '%s', chart '%s' is collected in the same interpolation point: short by %llu microseconds", st->rrdhost->hostname, st->name, next_store_ut - now_collect_ut);
+ }
+#endif
+
+ rrdset_done_interpolate(st
+ , update_every_ut
+ , last_stored_ut
+ , next_store_ut
+ , last_collect_ut
+ , now_collect_ut
+ , store_this_entry
+ , storage_flags
+ );
+
+ st->last_collected_total = st->collected_total;
+
+ rrddim_foreach_read(rd, st) {
+ if(unlikely(!rd->updated))
+ continue;
+
+ #ifdef NETDATA_INTERNAL_CHECKS
+ rrdset_debug(st, "%s: setting last_collected_value (old: " COLLECTED_NUMBER_FORMAT ") to last_collected_value (new: " COLLECTED_NUMBER_FORMAT ")", rd->name, rd->last_collected_value, rd->collected_value);
+ #endif
+
+ rd->last_collected_value = rd->collected_value;
+
+ switch(rd->algorithm) {
+ case RRD_ALGORITHM_INCREMENTAL:
+ if(unlikely(!first_entry)) {
+ #ifdef NETDATA_INTERNAL_CHECKS
+ rrdset_debug(st, "%s: setting last_calculated_value (old: " CALCULATED_NUMBER_FORMAT ") to last_calculated_value (new: " CALCULATED_NUMBER_FORMAT ")", rd->name, rd->last_calculated_value + rd->calculated_value, rd->calculated_value);
+ #endif
+
+ rd->last_calculated_value += rd->calculated_value;
+ }
+ else {
+ #ifdef NETDATA_INTERNAL_CHECKS
+ rrdset_debug(st, "THIS IS THE FIRST POINT");
+ #endif
+ }
+ break;
+
+ case RRD_ALGORITHM_ABSOLUTE:
+ case RRD_ALGORITHM_PCENT_OVER_ROW_TOTAL:
+ case RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL:
+ #ifdef NETDATA_INTERNAL_CHECKS
+ rrdset_debug(st, "%s: setting last_calculated_value (old: " CALCULATED_NUMBER_FORMAT ") to last_calculated_value (new: " CALCULATED_NUMBER_FORMAT ")", rd->name, rd->last_calculated_value, rd->calculated_value);
+ #endif
+
+ rd->last_calculated_value = rd->calculated_value;
+ break;
+ }
+
+ rd->calculated_value = 0;
+ rd->collected_value = 0;
+ rd->updated = 0;
+
+ #ifdef NETDATA_INTERNAL_CHECKS
+ rrdset_debug(st, "%s: END "
+ " last_collected_value = " COLLECTED_NUMBER_FORMAT
+ " collected_value = " COLLECTED_NUMBER_FORMAT
+ " last_calculated_value = " CALCULATED_NUMBER_FORMAT
+ " calculated_value = " CALCULATED_NUMBER_FORMAT
+ , rd->name
+ , rd->last_collected_value
+ , rd->collected_value
+ , rd->last_calculated_value
+ , rd->calculated_value
+ );
+ #endif
+
+ }
+
+ // ALL DONE ABOUT THE DATA UPDATE
+ // --------------------------------------------------------------------
+
+/*
+ // find if there are any obsolete dimensions (not updated recently)
+ if(unlikely(rrd_delete_unupdated_dimensions)) {
+
+ for( rd = st->dimensions; likely(rd) ; rd = rd->next )
+ if((rd->last_collected_time.tv_sec + (rrd_delete_unupdated_dimensions * st->update_every)) < st->last_collected_time.tv_sec)
+ break;
+
+ if(unlikely(rd)) {
+ RRDDIM *last;
+ // there is dimension to free
+ // upgrade our read lock to a write lock
+ rrdset_unlock(st);
+ rrdset_wrlock(st);
+
+ for( rd = st->dimensions, last = NULL ; likely(rd) ; ) {
+ // remove it only it is not updated in rrd_delete_unupdated_dimensions seconds
+
+ if(unlikely((rd->last_collected_time.tv_sec + (rrd_delete_unupdated_dimensions * st->update_every)) < st->last_collected_time.tv_sec)) {
+ info("Removing obsolete dimension '%s' (%s) of '%s' (%s).", rd->name, rd->id, st->name, st->id);
+
+ if(unlikely(!last)) {
+ st->dimensions = rd->next;
+ rd->next = NULL;
+ rrddim_free(st, rd);
+ rd = st->dimensions;
+ continue;
+ }
+ else {
+ last->next = rd->next;
+ rd->next = NULL;
+ rrddim_free(st, rd);
+ rd = last->next;
+ continue;
+ }
+ }
+
+ last = rd;
+ rd = rd->next;
+ }
+
+ if(unlikely(!st->dimensions)) {
+ info("Disabling chart %s (%s) since it does not have any dimensions", st->name, st->id);
+ st->enabled = 0;
+ }
+ }
+ }
+*/
+
+ rrdset_unlock(st);
+
+ netdata_thread_enable_cancelability();
+}