Merging upstream version 1.11.0+dfsg.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 0 insertions, 1544 deletions

diff --git a/src/rrdset.c b/src/rrdset.c
deleted file mode 100644
index bbd0ae728..000000000
--- a/src/rrdset.c
+++ /dev/null
@@ -1,1544 +0,0 @@
-#define NETDATA_RRD_INTERNALS 1
-#include "common.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);
-
-    return 1;
-}
-
-inline void rrdset_is_obsolete(RRDSET *st) {
-    RRDHOST *host = st->rrdhost;
-
-    if(unlikely(!(rrdset_flag_check(st, RRDSET_FLAG_OBSOLETE)))) {
-        rrdset_flag_set(st, RRDSET_FLAG_OBSOLETE);
-        rrdset_flag_clear(st, RRDSET_FLAG_EXPOSED_UPSTREAM);
-
-        // the chart will not get more updates (data collection)
-        // so, we have to push its definition now
-        if(unlikely(host->rrdpush_send_enabled))
-            rrdset_push_chart_definition(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_EXPOSED_UPSTREAM);
-
-        // the chart will be pushed upstream automatically
-        // due to data collection
-    }
-}
-
-inline void rrdset_update_heterogeneous_flag(RRDSET *st) {
-    RRDHOST *host = st->rrdhost;
-    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) return st;
-
-    rrdhost_wrlock(host);
-
-    st = rrdset_find_on_create(host, fullid);
-    if(st) {
-        rrdhost_unlock(host);
-        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. Clearing it.", fullfilename);
-                    memset(st, 0, size);
-                }
-
-                // 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?strdup(plugin):NULL;
-    st->module_name = module?strdup(module):NULL;
-
-    st->config_section = strdup(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_EXPOSED_UPSTREAM);
-
-    // 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)) {
-        // 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);
-
-    if(unlikely(!st->last_collected_time.tv_sec)) {
-        // the first entry
-        microseconds = st->update_every * USEC_PER_SEC;
-    }
-    else if(unlikely(!microseconds)) {
-        // no dt given by the plugin
-        microseconds = dt_usec(&now, &st->last_collected_time);
-    }
-    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;
-        }
-        else if(unlikely((usec_t)since_last_usec > (usec_t)(st->update_every * 10 * 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
-    debug(D_RRD_CALLS, "rrdset_next_usec() for chart %s with microseconds %llu", st->name, microseconds);
-    rrdset_debug(st, "NEXT: %llu microseconds", microseconds);
-    #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;
-    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) ? " **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) ? " **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;
-
-                    rd->last_collected_value = rd->collected_value;
-                }
-
-                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();
-}