62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
/*****************************************************************************
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* RRDtool 1.4.9 Copyright by Tobi Oetiker, 1997-2014
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*****************************************************************************
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* rrd_hw.h : Support for Holt-Winters Smoothing/ Aberrant Behavior Detection
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*****************************************************************************/
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/* functions implemented in rrd_hw.c */
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int update_aberrant_CF(
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rrd_t *rrd,
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rrd_value_t pdp_val,
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enum cf_en current_cf,
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unsigned long cdp_idx,
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unsigned long rra_idx,
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unsigned long ds_idx,
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unsigned short CDP_scratch_idx,
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rrd_value_t *seasonal_coef);
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int create_hw_contingent_rras(
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rrd_t *rrd,
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unsigned short period,
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unsigned long hashed_name);
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int lookup_seasonal(
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rrd_t *rrd,
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unsigned long rra_idx,
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unsigned long rra_start,
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rrd_file_t *rrd_file,
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unsigned long offset,
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rrd_value_t **seasonal_coef);
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int erase_violations(
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rrd_t *rrd,
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unsigned long cdp_idx,
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unsigned long rra_idx);
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int apply_smoother(
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rrd_t *rrd,
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unsigned long rra_idx,
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unsigned long rra_start,
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rrd_file_t *rrd_file);
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void init_hwpredict_cdp(
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cdp_prep_t *);
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void init_seasonal_cdp(
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cdp_prep_t *);
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#define BURNIN_CYCLES 3
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/* a standard fixed-capacity FIFO queue implementation */
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typedef struct FIFOqueue {
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rrd_value_t *queue;
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int capacity, head, tail;
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} FIFOqueue;
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int queue_alloc(
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FIFOqueue **q,
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int capacity);
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void queue_dealloc(
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FIFOqueue *q);
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void queue_push(
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FIFOqueue *q,
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rrd_value_t value);
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int queue_isempty(
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FIFOqueue *q);
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rrd_value_t queue_pop(
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FIFOqueue *q);
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