diff options
Diffstat (limited to 'web/api/queries/ses/ses.h')
-rw-r--r-- | web/api/queries/ses/ses.h | 92 |
1 files changed, 0 insertions, 92 deletions
diff --git a/web/api/queries/ses/ses.h b/web/api/queries/ses/ses.h deleted file mode 100644 index de8645ff..00000000 --- a/web/api/queries/ses/ses.h +++ /dev/null @@ -1,92 +0,0 @@ -// SPDX-License-Identifier: GPL-3.0-or-later - -#ifndef NETDATA_API_QUERIES_SES_H -#define NETDATA_API_QUERIES_SES_H - -#include "../query.h" -#include "../rrdr.h" - -struct tg_ses { - NETDATA_DOUBLE alpha; - NETDATA_DOUBLE alpha_other; - NETDATA_DOUBLE level; - size_t count; -}; - -static size_t tg_ses_max_window_size = 15; - -static inline void tg_ses_init(void) { - long long ret = config_get_number(CONFIG_SECTION_WEB, "ses max tg_des_window", (long long)tg_ses_max_window_size); - if(ret <= 1) { - config_set_number(CONFIG_SECTION_WEB, "ses max tg_des_window", (long long)tg_ses_max_window_size); - } - else { - tg_ses_max_window_size = (size_t) ret; - } -} - -static inline NETDATA_DOUBLE tg_ses_window(RRDR *r, struct tg_ses *g) { - (void)g; - - NETDATA_DOUBLE points; - if(r->view.group == 1) { - // provide a running DES - points = (NETDATA_DOUBLE)r->time_grouping.points_wanted; - } - else { - // provide a SES with flush points - points = (NETDATA_DOUBLE)r->view.group; - } - - return (points > (NETDATA_DOUBLE)tg_ses_max_window_size) ? (NETDATA_DOUBLE)tg_ses_max_window_size : points; -} - -static inline void tg_ses_set_alpha(RRDR *r, struct tg_ses *g) { - // https://en.wikipedia.org/wiki/Moving_average#Exponential_moving_average - // A commonly used value for alpha is 2 / (N + 1) - g->alpha = 2.0 / (tg_ses_window(r, g) + 1.0); - g->alpha_other = 1.0 - g->alpha; -} - -static inline void tg_ses_create(RRDR *r, const char *options __maybe_unused) { - struct tg_ses *g = (struct tg_ses *)onewayalloc_callocz(r->internal.owa, 1, sizeof(struct tg_ses)); - tg_ses_set_alpha(r, g); - g->level = 0.0; - r->time_grouping.data = g; -} - -// resets when switches dimensions -// so, clear everything to restart -static inline void tg_ses_reset(RRDR *r) { - struct tg_ses *g = (struct tg_ses *)r->time_grouping.data; - g->level = 0.0; - g->count = 0; -} - -static inline void tg_ses_free(RRDR *r) { - onewayalloc_freez(r->internal.owa, r->time_grouping.data); - r->time_grouping.data = NULL; -} - -static inline void tg_ses_add(RRDR *r, NETDATA_DOUBLE value) { - struct tg_ses *g = (struct tg_ses *)r->time_grouping.data; - - if(unlikely(!g->count)) - g->level = value; - - g->level = g->alpha * value + g->alpha_other * g->level; - g->count++; -} - -static inline NETDATA_DOUBLE tg_ses_flush(RRDR *r, RRDR_VALUE_FLAGS *rrdr_value_options_ptr) { - struct tg_ses *g = (struct tg_ses *)r->time_grouping.data; - - if(unlikely(!g->count || !netdata_double_isnumber(g->level))) { - *rrdr_value_options_ptr |= RRDR_VALUE_EMPTY; - return 0.0; - } - - return g->level; -} - -#endif //NETDATA_API_QUERIES_SES_H |