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-rw-r--r--web/api/queries/ses/README.md4
-rw-r--r--web/api/queries/ses/ses.c82
-rw-r--r--web/api/queries/ses/ses.h87
3 files changed, 85 insertions, 88 deletions
diff --git a/web/api/queries/ses/README.md b/web/api/queries/ses/README.md
index b835b8120..56634d36e 100644
--- a/web/api/queries/ses/README.md
+++ b/web/api/queries/ses/README.md
@@ -1,6 +1,10 @@
<!--
title: "Single (or Simple) Exponential Smoothing (`ses`)"
+sidebar_label: "Single (or Simple) Exponential Smoothing (`ses`)"
custom_edit_url: https://github.com/netdata/netdata/edit/master/web/api/queries/ses/README.md
+learn_status: "Published"
+learn_topic_type: "References"
+learn_rel_path: "Developers/Web/Api/Queries"
-->
# Single (or Simple) Exponential Smoothing (`ses`)
diff --git a/web/api/queries/ses/ses.c b/web/api/queries/ses/ses.c
index 5e94002c3..39eb445a0 100644
--- a/web/api/queries/ses/ses.c
+++ b/web/api/queries/ses/ses.c
@@ -6,85 +6,3 @@
// ----------------------------------------------------------------------------
// single exponential smoothing
-struct grouping_ses {
- NETDATA_DOUBLE alpha;
- NETDATA_DOUBLE alpha_other;
- NETDATA_DOUBLE level;
- size_t count;
-};
-
-static size_t max_window_size = 15;
-
-void grouping_init_ses(void) {
- long long ret = config_get_number(CONFIG_SECTION_WEB, "ses max window", (long long)max_window_size);
- if(ret <= 1) {
- config_set_number(CONFIG_SECTION_WEB, "ses max window", (long long)max_window_size);
- }
- else {
- max_window_size = (size_t) ret;
- }
-}
-
-static inline NETDATA_DOUBLE window(RRDR *r, struct grouping_ses *g) {
- (void)g;
-
- NETDATA_DOUBLE points;
- if(r->group == 1) {
- // provide a running DES
- points = (NETDATA_DOUBLE)r->internal.points_wanted;
- }
- else {
- // provide a SES with flush points
- points = (NETDATA_DOUBLE)r->group;
- }
-
- return (points > (NETDATA_DOUBLE)max_window_size) ? (NETDATA_DOUBLE)max_window_size : points;
-}
-
-static inline void set_alpha(RRDR *r, struct grouping_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 / (window(r, g) + 1.0);
- g->alpha_other = 1.0 - g->alpha;
-}
-
-void grouping_create_ses(RRDR *r, const char *options __maybe_unused) {
- struct grouping_ses *g = (struct grouping_ses *)onewayalloc_callocz(r->internal.owa, 1, sizeof(struct grouping_ses));
- set_alpha(r, g);
- g->level = 0.0;
- r->internal.grouping_data = g;
-}
-
-// resets when switches dimensions
-// so, clear everything to restart
-void grouping_reset_ses(RRDR *r) {
- struct grouping_ses *g = (struct grouping_ses *)r->internal.grouping_data;
- g->level = 0.0;
- g->count = 0;
-}
-
-void grouping_free_ses(RRDR *r) {
- onewayalloc_freez(r->internal.owa, r->internal.grouping_data);
- r->internal.grouping_data = NULL;
-}
-
-void grouping_add_ses(RRDR *r, NETDATA_DOUBLE value) {
- struct grouping_ses *g = (struct grouping_ses *)r->internal.grouping_data;
-
- if(unlikely(!g->count))
- g->level = value;
-
- g->level = g->alpha * value + g->alpha_other * g->level;
- g->count++;
-}
-
-NETDATA_DOUBLE grouping_flush_ses(RRDR *r, RRDR_VALUE_FLAGS *rrdr_value_options_ptr) {
- struct grouping_ses *g = (struct grouping_ses *)r->internal.grouping_data;
-
- if(unlikely(!g->count || !netdata_double_isnumber(g->level))) {
- *rrdr_value_options_ptr |= RRDR_VALUE_EMPTY;
- return 0.0;
- }
-
- return g->level;
-}
diff --git a/web/api/queries/ses/ses.h b/web/api/queries/ses/ses.h
index 79b09fbdf..de8645ff0 100644
--- a/web/api/queries/ses/ses.h
+++ b/web/api/queries/ses/ses.h
@@ -6,12 +6,87 @@
#include "../query.h"
#include "../rrdr.h"
-void grouping_init_ses(void);
+struct tg_ses {
+ NETDATA_DOUBLE alpha;
+ NETDATA_DOUBLE alpha_other;
+ NETDATA_DOUBLE level;
+ size_t count;
+};
-void grouping_create_ses(RRDR *r, const char *options __maybe_unused);
-void grouping_reset_ses(RRDR *r);
-void grouping_free_ses(RRDR *r);
-void grouping_add_ses(RRDR *r, NETDATA_DOUBLE value);
-NETDATA_DOUBLE grouping_flush_ses(RRDR *r, RRDR_VALUE_FLAGS *rrdr_value_options_ptr);
+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
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