diff options
Diffstat (limited to 'src/rrddim.c')
| -rw-r--r-- | src/rrddim.c | 313 |
1 files changed, 313 insertions, 0 deletions
diff --git a/src/rrddim.c b/src/rrddim.c new file mode 100644 index 00000000..54a17522 --- /dev/null +++ b/src/rrddim.c @@ -0,0 +1,313 @@ +#define NETDATA_RRD_INTERNALS 1 +#include "common.h" + +// ---------------------------------------------------------------------------- +// RRDDIM index + +int rrddim_compare(void* a, void* b) { + if(((RRDDIM *)a)->hash < ((RRDDIM *)b)->hash) return -1; + else if(((RRDDIM *)a)->hash > ((RRDDIM *)b)->hash) return 1; + else return strcmp(((RRDDIM *)a)->id, ((RRDDIM *)b)->id); +} + +#define rrddim_index_add(st, rd) (RRDDIM *)avl_insert_lock(&((st)->dimensions_index), (avl *)(rd)) +#define rrddim_index_del(st,rd ) (RRDDIM *)avl_remove_lock(&((st)->dimensions_index), (avl *)(rd)) + +static inline RRDDIM *rrddim_index_find(RRDSET *st, const char *id, uint32_t hash) { + RRDDIM tmp = { + .id = id, + .hash = (hash)?hash:simple_hash(id) + }; + return (RRDDIM *)avl_search_lock(&(st->dimensions_index), (avl *) &tmp); +} + + +// ---------------------------------------------------------------------------- +// RRDDIM - find a dimension + +inline RRDDIM *rrddim_find(RRDSET *st, const char *id) { + debug(D_RRD_CALLS, "rrddim_find() for chart %s, dimension %s", st->name, id); + + return rrddim_index_find(st, id, 0); +} + + +// ---------------------------------------------------------------------------- +// RRDDIM rename a dimension + +inline void rrddim_set_name(RRDSET *st, RRDDIM *rd, const char *name) { + if(unlikely(!strcmp(rd->name, name))) + return; + + debug(D_RRD_CALLS, "rrddim_set_name() from %s.%s to %s.%s", st->name, rd->name, st->name, name); + + char varname[CONFIG_MAX_NAME + 1]; + snprintfz(varname, CONFIG_MAX_NAME, "dim %s name", rd->id); + rd->name = config_set_default(st->config_section, varname, name); + rd->hash_name = simple_hash(rd->name); + + rrddimvar_rename_all(rd); +} + + +// ---------------------------------------------------------------------------- +// RRDDIM create a dimension + +RRDDIM *rrddim_add(RRDSET *st, const char *id, const char *name, collected_number multiplier, collected_number divisor, RRD_ALGORITHM algorithm) { + RRDDIM *rd = rrddim_find(st, id); + if(unlikely(rd)) { + debug(D_RRD_CALLS, "Cannot create rrd dimension '%s/%s', it already exists.", st->id, name?name:"<NONAME>"); + return rd; + } + + char filename[FILENAME_MAX + 1]; + char fullfilename[FILENAME_MAX + 1]; + + char varname[CONFIG_MAX_NAME + 1]; + unsigned long size = sizeof(RRDDIM) + (st->entries * sizeof(storage_number)); + + debug(D_RRD_CALLS, "Adding dimension '%s/%s'.", st->id, id); + + rrdset_strncpyz_name(filename, id, FILENAME_MAX); + snprintfz(fullfilename, FILENAME_MAX, "%s/%s.db", st->cache_dir, filename); + + if(st->rrd_memory_mode == RRD_MEMORY_MODE_SAVE || st->rrd_memory_mode == RRD_MEMORY_MODE_MAP) { + rd = (RRDDIM *)mymmap(fullfilename, size, ((st->rrd_memory_mode == RRD_MEMORY_MODE_MAP) ? MAP_SHARED : MAP_PRIVATE), 1); + if(likely(rd)) { + // we have a file mapped for rd + + memset(&rd->avl, 0, sizeof(avl)); + rd->id = NULL; + rd->name = NULL; + rd->cache_filename = NULL; + rd->variables = NULL; + rd->next = NULL; + rd->rrdset = NULL; + + struct timeval now; + now_realtime_timeval(&now); + + if(strcmp(rd->magic, RRDDIMENSION_MAGIC) != 0) { + errno = 0; + info("Initializing file %s.", fullfilename); + memset(rd, 0, size); + } + else if(rd->memsize != size) { + errno = 0; + error("File %s does not have the desired size. Clearing it.", fullfilename); + memset(rd, 0, size); + } + else if(rd->multiplier != multiplier) { + errno = 0; + error("File %s does not have the same multiplier. Clearing it.", fullfilename); + memset(rd, 0, size); + } + else if(rd->divisor != divisor) { + errno = 0; + error("File %s does not have the same divisor. Clearing it.", fullfilename); + memset(rd, 0, size); + } + else if(rd->update_every != st->update_every) { + errno = 0; + error("File %s does not have the same refresh frequency. Clearing it.", fullfilename); + memset(rd, 0, size); + } + else if(dt_usec(&now, &rd->last_collected_time) > (rd->entries * rd->update_every * USEC_PER_SEC)) { + errno = 0; + error("File %s is too old. Clearing it.", fullfilename); + memset(rd, 0, size); + } + + if(rd->algorithm && rd->algorithm != algorithm) + error("File %s does not have the expected algorithm (expected %u '%s', found %u '%s'). Previous values may be wrong." + , fullfilename, algorithm, rrd_algorithm_name(algorithm), rd->algorithm, + rrd_algorithm_name(rd->algorithm)); + + // make sure we have the right memory mode + // even if we cleared the memory + rd->rrd_memory_mode = st->rrd_memory_mode; + } + } + + if(unlikely(!rd)) { + // if we didn't manage to get a mmap'd dimension, just create one + rd = callocz(1, size); + rd->rrd_memory_mode = (st->rrd_memory_mode == RRD_MEMORY_MODE_NONE) ? RRD_MEMORY_MODE_NONE : RRD_MEMORY_MODE_RAM; + } + + rd->memsize = size; + + strcpy(rd->magic, RRDDIMENSION_MAGIC); + + rd->id = strdupz(id); + rd->hash = simple_hash(rd->id); + + rd->cache_filename = strdupz(fullfilename); + + snprintfz(varname, CONFIG_MAX_NAME, "dim %s name", rd->id); + rd->name = config_get(st->config_section, varname, (name && *name)?name:rd->id); + rd->hash_name = simple_hash(rd->name); + + snprintfz(varname, CONFIG_MAX_NAME, "dim %s algorithm", rd->id); + rd->algorithm = rrd_algorithm_id(config_get(st->config_section, varname, rrd_algorithm_name(algorithm))); + + snprintfz(varname, CONFIG_MAX_NAME, "dim %s multiplier", rd->id); + rd->multiplier = config_get_number(st->config_section, varname, multiplier); + + snprintfz(varname, CONFIG_MAX_NAME, "dim %s divisor", rd->id); + rd->divisor = config_get_number(st->config_section, varname, divisor); + if(!rd->divisor) rd->divisor = 1; + + rd->entries = st->entries; + rd->update_every = st->update_every; + + // prevent incremental calculation spikes + rd->collections_counter = 0; + rd->updated = 0; + rd->flags = 0x00000000; + + rd->calculated_value = 0; + rd->last_calculated_value = 0; + rd->collected_value = 0; + rd->last_collected_value = 0; + rd->collected_volume = 0; + rd->stored_volume = 0; + rd->last_stored_value = 0; + rd->values[st->current_entry] = pack_storage_number(0, SN_NOT_EXISTS); + rd->last_collected_time.tv_sec = 0; + rd->last_collected_time.tv_usec = 0; + rd->rrdset = st; + + // append this dimension + rrdset_wrlock(st); + if(!st->dimensions) + st->dimensions = rd; + else { + RRDDIM *td = st->dimensions; + for(; td->next; td = td->next) ; + td->next = rd; + } + + if(st->rrdhost->health_enabled) { + rrddimvar_create(rd, RRDVAR_TYPE_CALCULATED, NULL, NULL, &rd->last_stored_value, 0); + rrddimvar_create(rd, RRDVAR_TYPE_COLLECTED, NULL, "_raw", &rd->last_collected_value, 0); + rrddimvar_create(rd, RRDVAR_TYPE_TIME_T, NULL, "_last_collected_t", &rd->last_collected_time.tv_sec, 0); + } + + rrdset_unlock(st); + + if(unlikely(rrddim_index_add(st, rd) != rd)) + error("RRDDIM: INTERNAL ERROR: attempt to index duplicate dimension '%s' on chart '%s'", rd->id, st->id); + + return(rd); +} + + +// ---------------------------------------------------------------------------- +// RRDDIM remove / free a dimension + +void rrddim_free(RRDSET *st, RRDDIM *rd) +{ + debug(D_RRD_CALLS, "rrddim_free() %s.%s", st->name, rd->name); + + if(rd == st->dimensions) + st->dimensions = rd->next; + else { + RRDDIM *i; + for (i = st->dimensions; i && i->next != rd; i = i->next) ; + + if (i && i->next == rd) + i->next = rd->next; + else + error("Request to free dimension '%s.%s' but it is not linked.", st->id, rd->name); + } + rd->next = NULL; + + while(rd->variables) + rrddimvar_free(rd->variables); + + if(unlikely(rrddim_index_del(st, rd) != rd)) + error("RRDDIM: INTERNAL ERROR: attempt to remove from index dimension '%s' on chart '%s', removed a different dimension.", rd->id, st->id); + + // free(rd->annotations); + + switch(rd->rrd_memory_mode) { + case RRD_MEMORY_MODE_SAVE: + debug(D_RRD_CALLS, "Saving dimension '%s' to '%s'.", rd->name, rd->cache_filename); + savememory(rd->cache_filename, rd, rd->memsize); + // continue to map mode - no break; + + case RRD_MEMORY_MODE_MAP: + debug(D_RRD_CALLS, "Unmapping dimension '%s'.", rd->name); + freez((void *)rd->id); + freez(rd->cache_filename); + munmap(rd, rd->memsize); + break; + + case RRD_MEMORY_MODE_NONE: + case RRD_MEMORY_MODE_RAM: + debug(D_RRD_CALLS, "Removing dimension '%s'.", rd->name); + freez((void *)rd->id); + freez(rd->cache_filename); + freez(rd); + break; + } +} + + +// ---------------------------------------------------------------------------- +// RRDDIM - set dimension options + +int rrddim_hide(RRDSET *st, const char *id) { + debug(D_RRD_CALLS, "rrddim_hide() for chart %s, dimension %s", st->name, id); + + RRDDIM *rd = rrddim_find(st, id); + if(unlikely(!rd)) { + error("Cannot find dimension with id '%s' on stats '%s' (%s).", id, st->name, st->id); + return 1; + } + + rrddim_flag_set(rd, RRDDIM_FLAG_HIDDEN); + return 0; +} + +int rrddim_unhide(RRDSET *st, const char *id) { + debug(D_RRD_CALLS, "rrddim_unhide() for chart %s, dimension %s", st->name, id); + + RRDDIM *rd = rrddim_find(st, id); + if(unlikely(!rd)) { + error("Cannot find dimension with id '%s' on stats '%s' (%s).", id, st->name, st->id); + return 1; + } + + rrddim_flag_clear(rd, RRDDIM_FLAG_HIDDEN); + return 0; +} + + +// ---------------------------------------------------------------------------- +// RRDDIM - collect values for a dimension + +inline collected_number rrddim_set_by_pointer(RRDSET *st, RRDDIM *rd, collected_number value) { + debug(D_RRD_CALLS, "rrddim_set_by_pointer() for chart %s, dimension %s, value " COLLECTED_NUMBER_FORMAT, st->name, rd->name, value); + + now_realtime_timeval(&rd->last_collected_time); + rd->collected_value = value; + rd->updated = 1; + + rd->collections_counter++; + + // fprintf(stderr, "%s.%s %llu " COLLECTED_NUMBER_FORMAT " dt %0.6f" " rate " CALCULATED_NUMBER_FORMAT "\n", st->name, rd->name, st->usec_since_last_update, value, (float)((double)st->usec_since_last_update / (double)1000000), (calculated_number)((value - rd->last_collected_value) * (calculated_number)rd->multiplier / (calculated_number)rd->divisor * 1000000.0 / (calculated_number)st->usec_since_last_update)); + + return rd->last_collected_value; +} + +collected_number rrddim_set(RRDSET *st, const char *id, collected_number value) { + RRDDIM *rd = rrddim_find(st, id); + if(unlikely(!rd)) { + error("Cannot find dimension with id '%s' on stats '%s' (%s).", id, st->name, st->id); + return 0; + } + + return rrddim_set_by_pointer(st, rd, value); +} |