summaryrefslogtreecommitdiff
path: root/deps/node/deps/histogram/src/hdr_histogram.c
diff options
context:
space:
mode:
Diffstat (limited to 'deps/node/deps/histogram/src/hdr_histogram.c')
-rw-r--r--deps/node/deps/histogram/src/hdr_histogram.c1047
1 files changed, 0 insertions, 1047 deletions
diff --git a/deps/node/deps/histogram/src/hdr_histogram.c b/deps/node/deps/histogram/src/hdr_histogram.c
deleted file mode 100644
index d9565b80..00000000
--- a/deps/node/deps/histogram/src/hdr_histogram.c
+++ /dev/null
@@ -1,1047 +0,0 @@
-/**
- * hdr_histogram.c
- * Written by Michael Barker and released to the public domain,
- * as explained at http://creativecommons.org/publicdomain/zero/1.0/
- */
-
-#include <stdlib.h>
-#include <stdbool.h>
-#include <math.h>
-#include <assert.h>
-#include <stdio.h>
-#include <string.h>
-#include <stdint.h>
-#include <errno.h>
-#include <inttypes.h>
-
-#include "hdr_histogram.h"
-#include "hdr_tests.h"
-
-/* ###### ####### ## ## ## ## ######## ###### */
-/* ## ## ## ## ## ## ### ## ## ## ## */
-/* ## ## ## ## ## #### ## ## ## */
-/* ## ## ## ## ## ## ## ## ## ###### */
-/* ## ## ## ## ## ## #### ## ## */
-/* ## ## ## ## ## ## ## ### ## ## ## */
-/* ###### ####### ####### ## ## ## ###### */
-
-static int32_t normalize_index(const struct hdr_histogram* h, int32_t index)
-{
- int32_t normalized_index;
- int32_t adjustment = 0;
- if (h->normalizing_index_offset == 0)
- {
- return index;
- }
-
- normalized_index = index - h->normalizing_index_offset;
-
- if (normalized_index < 0)
- {
- adjustment = h->counts_len;
- }
- else if (normalized_index >= h->counts_len)
- {
- adjustment = -h->counts_len;
- }
-
- return normalized_index + adjustment;
-}
-
-static int64_t counts_get_direct(const struct hdr_histogram* h, int32_t index)
-{
- return h->counts[index];
-}
-
-static int64_t counts_get_normalised(const struct hdr_histogram* h, int32_t index)
-{
- return counts_get_direct(h, normalize_index(h, index));
-}
-
-static void counts_inc_normalised(
- struct hdr_histogram* h, int32_t index, int64_t value)
-{
- int32_t normalised_index = normalize_index(h, index);
- h->counts[normalised_index] += value;
- h->total_count += value;
-}
-
-static void update_min_max(struct hdr_histogram* h, int64_t value)
-{
- h->min_value = (value < h->min_value && value != 0) ? value : h->min_value;
- h->max_value = (value > h->max_value) ? value : h->max_value;
-}
-
-/* ## ## ######## #### ## #### ######## ## ## */
-/* ## ## ## ## ## ## ## ## ## */
-/* ## ## ## ## ## ## ## #### */
-/* ## ## ## ## ## ## ## ## */
-/* ## ## ## ## ## ## ## ## */
-/* ## ## ## ## ## ## ## ## */
-/* ####### ## #### ######## #### ## ## */
-
-static int64_t power(int64_t base, int64_t exp)
-{
- int64_t result = 1;
- while(exp)
- {
- result *= base; exp--;
- }
- return result;
-}
-
-#if defined(_MSC_VER)
-# if defined(_WIN64)
-# pragma intrinsic(_BitScanReverse64)
-# else
-# pragma intrinsic(_BitScanReverse)
-# endif
-#endif
-
-static int32_t get_bucket_index(const struct hdr_histogram* h, int64_t value)
-{
-#if defined(_MSC_VER)
- uint32_t leading_zero = 0;
- int64_t masked_value = value | h->sub_bucket_mask;
-# if defined(_WIN64)
- _BitScanReverse64(&leading_zero, masked_value);
-# else
- uint32_t high = masked_value >> 32;
- if (_BitScanReverse(&leading_zero, high)) {
- leading_zero += 32;
- } else {
- uint32_t low = masked_value & 0x00000000FFFFFFFF;
- _BitScanReverse(&leading_zero, low);
- }
-# endif
- int32_t pow2ceiling = 64 - (63 - leading_zero); /* smallest power of 2 containing value */
-#else
- int32_t pow2ceiling = 64 - __builtin_clzll(value | h->sub_bucket_mask); /* smallest power of 2 containing value */
-#endif
- return pow2ceiling - h->unit_magnitude - (h->sub_bucket_half_count_magnitude + 1);
-}
-
-static int32_t get_sub_bucket_index(int64_t value, int32_t bucket_index, int32_t unit_magnitude)
-{
- return (int32_t)(value >> (bucket_index + unit_magnitude));
-}
-
-static int32_t counts_index(const struct hdr_histogram* h, int32_t bucket_index, int32_t sub_bucket_index)
-{
- /* Calculate the index for the first entry in the bucket: */
- /* (The following is the equivalent of ((bucket_index + 1) * subBucketHalfCount) ): */
- int32_t bucket_base_index = (bucket_index + 1) << h->sub_bucket_half_count_magnitude;
- /* Calculate the offset in the bucket: */
- int32_t offset_in_bucket = sub_bucket_index - h->sub_bucket_half_count;
- /* The following is the equivalent of ((sub_bucket_index - subBucketHalfCount) + bucketBaseIndex; */
- return bucket_base_index + offset_in_bucket;
-}
-
-static int64_t value_from_index(int32_t bucket_index, int32_t sub_bucket_index, int32_t unit_magnitude)
-{
- return ((int64_t) sub_bucket_index) << (bucket_index + unit_magnitude);
-}
-
-int32_t counts_index_for(const struct hdr_histogram* h, int64_t value)
-{
- int32_t bucket_index = get_bucket_index(h, value);
- int32_t sub_bucket_index = get_sub_bucket_index(value, bucket_index, h->unit_magnitude);
-
- return counts_index(h, bucket_index, sub_bucket_index);
-}
-
-int64_t hdr_value_at_index(const struct hdr_histogram *h, int32_t index)
-{
- int32_t bucket_index = (index >> h->sub_bucket_half_count_magnitude) - 1;
- int32_t sub_bucket_index = (index & (h->sub_bucket_half_count - 1)) + h->sub_bucket_half_count;
-
- if (bucket_index < 0)
- {
- sub_bucket_index -= h->sub_bucket_half_count;
- bucket_index = 0;
- }
-
- return value_from_index(bucket_index, sub_bucket_index, h->unit_magnitude);
-}
-
-int64_t hdr_size_of_equivalent_value_range(const struct hdr_histogram* h, int64_t value)
-{
- int32_t bucket_index = get_bucket_index(h, value);
- int32_t sub_bucket_index = get_sub_bucket_index(value, bucket_index, h->unit_magnitude);
- int32_t adjusted_bucket = (sub_bucket_index >= h->sub_bucket_count) ? (bucket_index + 1) : bucket_index;
- return INT64_C(1) << (h->unit_magnitude + adjusted_bucket);
-}
-
-static int64_t lowest_equivalent_value(const struct hdr_histogram* h, int64_t value)
-{
- int32_t bucket_index = get_bucket_index(h, value);
- int32_t sub_bucket_index = get_sub_bucket_index(value, bucket_index, h->unit_magnitude);
- return value_from_index(bucket_index, sub_bucket_index, h->unit_magnitude);
-}
-
-int64_t hdr_next_non_equivalent_value(const struct hdr_histogram *h, int64_t value)
-{
- return lowest_equivalent_value(h, value) + hdr_size_of_equivalent_value_range(h, value);
-}
-
-static int64_t highest_equivalent_value(const struct hdr_histogram* h, int64_t value)
-{
- return hdr_next_non_equivalent_value(h, value) - 1;
-}
-
-int64_t hdr_median_equivalent_value(const struct hdr_histogram *h, int64_t value)
-{
- return lowest_equivalent_value(h, value) + (hdr_size_of_equivalent_value_range(h, value) >> 1);
-}
-
-static int64_t non_zero_min(const struct hdr_histogram* h)
-{
- if (INT64_MAX == h->min_value)
- {
- return INT64_MAX;
- }
-
- return lowest_equivalent_value(h, h->min_value);
-}
-
-void hdr_reset_internal_counters(struct hdr_histogram* h)
-{
- int min_non_zero_index = -1;
- int max_index = -1;
- int64_t observed_total_count = 0;
- int i;
-
- for (i = 0; i < h->counts_len; i++)
- {
- int64_t count_at_index;
-
- if ((count_at_index = counts_get_direct(h, i)) > 0)
- {
- observed_total_count += count_at_index;
- max_index = i;
- if (min_non_zero_index == -1 && i != 0)
- {
- min_non_zero_index = i;
- }
- }
- }
-
- if (max_index == -1)
- {
- h->max_value = 0;
- }
- else
- {
- int64_t max_value = hdr_value_at_index(h, max_index);
- h->max_value = highest_equivalent_value(h, max_value);
- }
-
- if (min_non_zero_index == -1)
- {
- h->min_value = INT64_MAX;
- }
- else
- {
- h->min_value = hdr_value_at_index(h, min_non_zero_index);
- }
-
- h->total_count = observed_total_count;
-}
-
-static int32_t buckets_needed_to_cover_value(int64_t value, int32_t sub_bucket_count, int32_t unit_magnitude)
-{
- int64_t smallest_untrackable_value = ((int64_t) sub_bucket_count) << unit_magnitude;
- int32_t buckets_needed = 1;
- while (smallest_untrackable_value <= value)
- {
- if (smallest_untrackable_value > INT64_MAX / 2)
- {
- return buckets_needed + 1;
- }
- smallest_untrackable_value <<= 1;
- buckets_needed++;
- }
-
- return buckets_needed;
-}
-
-/* ## ## ######## ## ## ####### ######## ## ## */
-/* ### ### ## ### ### ## ## ## ## ## ## */
-/* #### #### ## #### #### ## ## ## ## #### */
-/* ## ### ## ###### ## ### ## ## ## ######## ## */
-/* ## ## ## ## ## ## ## ## ## ## */
-/* ## ## ## ## ## ## ## ## ## ## */
-/* ## ## ######## ## ## ####### ## ## ## */
-
-int hdr_calculate_bucket_config(
- int64_t lowest_trackable_value,
- int64_t highest_trackable_value,
- int significant_figures,
- struct hdr_histogram_bucket_config* cfg)
-{
- int32_t sub_bucket_count_magnitude;
- int64_t largest_value_with_single_unit_resolution;
-
- if (lowest_trackable_value < 1 ||
- significant_figures < 1 || 5 < significant_figures)
- {
- return EINVAL;
- }
- else if (lowest_trackable_value * 2 > highest_trackable_value)
- {
- return EINVAL;
- }
-
- cfg->lowest_trackable_value = lowest_trackable_value;
- cfg->significant_figures = significant_figures;
- cfg->highest_trackable_value = highest_trackable_value;
-
- largest_value_with_single_unit_resolution = 2 * power(10, significant_figures);
- sub_bucket_count_magnitude = (int32_t) ceil(log((double)largest_value_with_single_unit_resolution) / log(2));
- cfg->sub_bucket_half_count_magnitude = ((sub_bucket_count_magnitude > 1) ? sub_bucket_count_magnitude : 1) - 1;
-
- cfg->unit_magnitude = (int32_t) floor(log((double)lowest_trackable_value) / log(2));
-
- cfg->sub_bucket_count = (int32_t) pow(2, (cfg->sub_bucket_half_count_magnitude + 1));
- cfg->sub_bucket_half_count = cfg->sub_bucket_count / 2;
- cfg->sub_bucket_mask = ((int64_t) cfg->sub_bucket_count - 1) << cfg->unit_magnitude;
-
- if (cfg->unit_magnitude + cfg->sub_bucket_half_count_magnitude > 61)
- {
- return EINVAL;
- }
-
- cfg->bucket_count = buckets_needed_to_cover_value(highest_trackable_value, cfg->sub_bucket_count, (int32_t)cfg->unit_magnitude);
- cfg->counts_len = (cfg->bucket_count + 1) * (cfg->sub_bucket_count / 2);
-
- return 0;
-}
-
-void hdr_init_preallocated(struct hdr_histogram* h, struct hdr_histogram_bucket_config* cfg)
-{
- h->lowest_trackable_value = cfg->lowest_trackable_value;
- h->highest_trackable_value = cfg->highest_trackable_value;
- h->unit_magnitude = (int32_t)cfg->unit_magnitude;
- h->significant_figures = (int32_t)cfg->significant_figures;
- h->sub_bucket_half_count_magnitude = cfg->sub_bucket_half_count_magnitude;
- h->sub_bucket_half_count = cfg->sub_bucket_half_count;
- h->sub_bucket_mask = cfg->sub_bucket_mask;
- h->sub_bucket_count = cfg->sub_bucket_count;
- h->min_value = INT64_MAX;
- h->max_value = 0;
- h->normalizing_index_offset = 0;
- h->conversion_ratio = 1.0;
- h->bucket_count = cfg->bucket_count;
- h->counts_len = cfg->counts_len;
- h->total_count = 0;
-}
-
-int hdr_init(
- int64_t lowest_trackable_value,
- int64_t highest_trackable_value,
- int significant_figures,
- struct hdr_histogram** result)
-{
- int64_t* counts;
- struct hdr_histogram_bucket_config cfg;
- struct hdr_histogram* histogram;
-
- int r = hdr_calculate_bucket_config(lowest_trackable_value, highest_trackable_value, significant_figures, &cfg);
- if (r)
- {
- return r;
- }
-
- counts = calloc((size_t) cfg.counts_len, sizeof(int64_t));
- histogram = calloc(1, sizeof(struct hdr_histogram));
-
- if (!counts || !histogram)
- {
- return ENOMEM;
- }
-
- histogram->counts = counts;
-
- hdr_init_preallocated(histogram, &cfg);
- *result = histogram;
-
- return 0;
-}
-
-void hdr_close(struct hdr_histogram* h)
-{
- free(h->counts);
- free(h);
-}
-
-int hdr_alloc(int64_t highest_trackable_value, int significant_figures, struct hdr_histogram** result)
-{
- return hdr_init(1, highest_trackable_value, significant_figures, result);
-}
-
-/* reset a histogram to zero. */
-void hdr_reset(struct hdr_histogram *h)
-{
- h->total_count=0;
- h->min_value = INT64_MAX;
- h->max_value = 0;
- memset(h->counts, 0, (sizeof(int64_t) * h->counts_len));
-}
-
-size_t hdr_get_memory_size(struct hdr_histogram *h)
-{
- return sizeof(struct hdr_histogram) + h->counts_len * sizeof(int64_t);
-}
-
-/* ## ## ######## ######## ### ######## ######## ###### */
-/* ## ## ## ## ## ## ## ## ## ## ## ## */
-/* ## ## ## ## ## ## ## ## ## ## ## */
-/* ## ## ######## ## ## ## ## ## ###### ###### */
-/* ## ## ## ## ## ######### ## ## ## */
-/* ## ## ## ## ## ## ## ## ## ## ## */
-/* ####### ## ######## ## ## ## ######## ###### */
-
-
-bool hdr_record_value(struct hdr_histogram* h, int64_t value)
-{
- return hdr_record_values(h, value, 1);
-}
-
-bool hdr_record_values(struct hdr_histogram* h, int64_t value, int64_t count)
-{
- int32_t counts_index;
-
- if (value < 0)
- {
- return false;
- }
-
- counts_index = counts_index_for(h, value);
-
- if (counts_index < 0 || h->counts_len <= counts_index)
- {
- return false;
- }
-
- counts_inc_normalised(h, counts_index, count);
- update_min_max(h, value);
-
- return true;
-}
-
-bool hdr_record_corrected_value(struct hdr_histogram* h, int64_t value, int64_t expected_interval)
-{
- return hdr_record_corrected_values(h, value, 1, expected_interval);
-}
-
-
-bool hdr_record_corrected_values(struct hdr_histogram* h, int64_t value, int64_t count, int64_t expected_interval)
-{
- int64_t missing_value;
-
- if (!hdr_record_values(h, value, count))
- {
- return false;
- }
-
- if (expected_interval <= 0 || value <= expected_interval)
- {
- return true;
- }
-
- missing_value = value - expected_interval;
- for (; missing_value >= expected_interval; missing_value -= expected_interval)
- {
- if (!hdr_record_values(h, missing_value, count))
- {
- return false;
- }
- }
-
- return true;
-}
-
-int64_t hdr_add(struct hdr_histogram* h, const struct hdr_histogram* from)
-{
- struct hdr_iter iter;
- int64_t dropped = 0;
- hdr_iter_recorded_init(&iter, from);
-
- while (hdr_iter_next(&iter))
- {
- int64_t value = iter.value;
- int64_t count = iter.count;
-
- if (!hdr_record_values(h, value, count))
- {
- dropped += count;
- }
- }
-
- return dropped;
-}
-
-int64_t hdr_add_while_correcting_for_coordinated_omission(
- struct hdr_histogram* h, struct hdr_histogram* from, int64_t expected_interval)
-{
- struct hdr_iter iter;
- int64_t dropped = 0;
- hdr_iter_recorded_init(&iter, from);
-
- while (hdr_iter_next(&iter))
- {
- int64_t value = iter.value;
- int64_t count = iter.count;
-
- if (!hdr_record_corrected_values(h, value, count, expected_interval))
- {
- dropped += count;
- }
- }
-
- return dropped;
-}
-
-
-
-/* ## ## ### ## ## ## ######## ###### */
-/* ## ## ## ## ## ## ## ## ## ## */
-/* ## ## ## ## ## ## ## ## ## */
-/* ## ## ## ## ## ## ## ###### ###### */
-/* ## ## ######### ## ## ## ## ## */
-/* ## ## ## ## ## ## ## ## ## ## */
-/* ### ## ## ######## ####### ######## ###### */
-
-
-int64_t hdr_max(const struct hdr_histogram* h)
-{
- if (0 == h->max_value)
- {
- return 0;
- }
-
- return highest_equivalent_value(h, h->max_value);
-}
-
-int64_t hdr_min(const struct hdr_histogram* h)
-{
- if (0 < hdr_count_at_index(h, 0))
- {
- return 0;
- }
-
- return non_zero_min(h);
-}
-
-int64_t hdr_value_at_percentile(const struct hdr_histogram* h, double percentile)
-{
- struct hdr_iter iter;
- int64_t total = 0;
- double requested_percentile = percentile < 100.0 ? percentile : 100.0;
- int64_t count_at_percentile =
- (int64_t) (((requested_percentile / 100) * h->total_count) + 0.5);
- count_at_percentile = count_at_percentile > 1 ? count_at_percentile : 1;
-
- hdr_iter_init(&iter, h);
-
- while (hdr_iter_next(&iter))
- {
- total += iter.count;
-
- if (total >= count_at_percentile)
- {
- int64_t value_from_index = iter.value;
- return highest_equivalent_value(h, value_from_index);
- }
- }
-
- return 0;
-}
-
-double hdr_mean(const struct hdr_histogram* h)
-{
- struct hdr_iter iter;
- int64_t total = 0;
-
- hdr_iter_init(&iter, h);
-
- while (hdr_iter_next(&iter))
- {
- if (0 != iter.count)
- {
- total += iter.count * hdr_median_equivalent_value(h, iter.value);
- }
- }
-
- return (total * 1.0) / h->total_count;
-}
-
-double hdr_stddev(const struct hdr_histogram* h)
-{
- double mean = hdr_mean(h);
- double geometric_dev_total = 0.0;
-
- struct hdr_iter iter;
- hdr_iter_init(&iter, h);
-
- while (hdr_iter_next(&iter))
- {
- if (0 != iter.count)
- {
- double dev = (hdr_median_equivalent_value(h, iter.value) * 1.0) - mean;
- geometric_dev_total += (dev * dev) * iter.count;
- }
- }
-
- return sqrt(geometric_dev_total / h->total_count);
-}
-
-bool hdr_values_are_equivalent(const struct hdr_histogram* h, int64_t a, int64_t b)
-{
- return lowest_equivalent_value(h, a) == lowest_equivalent_value(h, b);
-}
-
-int64_t hdr_lowest_equivalent_value(const struct hdr_histogram* h, int64_t value)
-{
- return lowest_equivalent_value(h, value);
-}
-
-int64_t hdr_count_at_value(const struct hdr_histogram* h, int64_t value)
-{
- return counts_get_normalised(h, counts_index_for(h, value));
-}
-
-int64_t hdr_count_at_index(const struct hdr_histogram* h, int32_t index)
-{
- return counts_get_normalised(h, index);
-}
-
-
-/* #### ######## ######## ######## ### ######## ####### ######## ###### */
-/* ## ## ## ## ## ## ## ## ## ## ## ## ## ## */
-/* ## ## ## ## ## ## ## ## ## ## ## ## ## */
-/* ## ## ###### ######## ## ## ## ## ## ######## ###### */
-/* ## ## ## ## ## ######### ## ## ## ## ## ## */
-/* ## ## ## ## ## ## ## ## ## ## ## ## ## ## */
-/* #### ## ######## ## ## ## ## ## ####### ## ## ###### */
-
-
-static bool has_buckets(struct hdr_iter* iter)
-{
- return iter->counts_index < iter->h->counts_len;
-}
-
-static bool has_next(struct hdr_iter* iter)
-{
- return iter->cumulative_count < iter->total_count;
-}
-
-static bool move_next(struct hdr_iter* iter)
-{
- iter->counts_index++;
-
- if (!has_buckets(iter))
- {
- return false;
- }
-
- iter->count = counts_get_normalised(iter->h, iter->counts_index);
- iter->cumulative_count += iter->count;
-
- iter->value = hdr_value_at_index(iter->h, iter->counts_index);
- iter->highest_equivalent_value = highest_equivalent_value(iter->h, iter->value);
- iter->lowest_equivalent_value = lowest_equivalent_value(iter->h, iter->value);
- iter->median_equivalent_value = hdr_median_equivalent_value(iter->h, iter->value);
-
- return true;
-}
-
-static int64_t peek_next_value_from_index(struct hdr_iter* iter)
-{
- return hdr_value_at_index(iter->h, iter->counts_index + 1);
-}
-
-static bool next_value_greater_than_reporting_level_upper_bound(
- struct hdr_iter *iter, int64_t reporting_level_upper_bound)
-{
- if (iter->counts_index >= iter->h->counts_len)
- {
- return false;
- }
-
- return peek_next_value_from_index(iter) > reporting_level_upper_bound;
-}
-
-static bool _basic_iter_next(struct hdr_iter *iter)
-{
- if (!has_next(iter) || iter->counts_index >= iter->h->counts_len)
- {
- return false;
- }
-
- move_next(iter);
-
- return true;
-}
-
-static void _update_iterated_values(struct hdr_iter* iter, int64_t new_value_iterated_to)
-{
- iter->value_iterated_from = iter->value_iterated_to;
- iter->value_iterated_to = new_value_iterated_to;
-}
-
-static bool _all_values_iter_next(struct hdr_iter* iter)
-{
- bool result = move_next(iter);
-
- if (result)
- {
- _update_iterated_values(iter, iter->value);
- }
-
- return result;
-}
-
-void hdr_iter_init(struct hdr_iter* iter, const struct hdr_histogram* h)
-{
- iter->h = h;
-
- iter->counts_index = -1;
- iter->total_count = h->total_count;
- iter->count = 0;
- iter->cumulative_count = 0;
- iter->value = 0;
- iter->highest_equivalent_value = 0;
- iter->value_iterated_from = 0;
- iter->value_iterated_to = 0;
-
- iter->_next_fp = _all_values_iter_next;
-}
-
-bool hdr_iter_next(struct hdr_iter* iter)
-{
- return iter->_next_fp(iter);
-}
-
-/* ######## ######## ######## ###### ######## ## ## ######## #### ## ######## ###### */
-/* ## ## ## ## ## ## ## ## ### ## ## ## ## ## ## ## */
-/* ## ## ## ## ## ## ## #### ## ## ## ## ## ## */
-/* ######## ###### ######## ## ###### ## ## ## ## ## ## ###### ###### */
-/* ## ## ## ## ## ## ## #### ## ## ## ## ## */
-/* ## ## ## ## ## ## ## ## ### ## ## ## ## ## ## */
-/* ## ######## ## ## ###### ######## ## ## ## #### ######## ######## ###### */
-
-static bool _percentile_iter_next(struct hdr_iter* iter)
-{
- int64_t temp, half_distance, percentile_reporting_ticks;
-
- struct hdr_iter_percentiles* percentiles = &iter->specifics.percentiles;
-
- if (!has_next(iter))
- {
- if (percentiles->seen_last_value)
- {
- return false;
- }
-
- percentiles->seen_last_value = true;
- percentiles->percentile = 100.0;
-
- return true;
- }
-
- if (iter->counts_index == -1 && !_basic_iter_next(iter))
- {
- return false;
- }
-
- do
- {
- double current_percentile = (100.0 * (double) iter->cumulative_count) / iter->h->total_count;
- if (iter->count != 0 &&
- percentiles->percentile_to_iterate_to <= current_percentile)
- {
- _update_iterated_values(iter, highest_equivalent_value(iter->h, iter->value));
-
- percentiles->percentile = percentiles->percentile_to_iterate_to;
- temp = (int64_t)(log(100 / (100.0 - (percentiles->percentile_to_iterate_to))) / log(2)) + 1;
- half_distance = (int64_t) pow(2, (double) temp);
- percentile_reporting_ticks = percentiles->ticks_per_half_distance * half_distance;
- percentiles->percentile_to_iterate_to += 100.0 / percentile_reporting_ticks;
-
- return true;
- }
- }
- while (_basic_iter_next(iter));
-
- return true;
-}
-
-void hdr_iter_percentile_init(struct hdr_iter* iter, const struct hdr_histogram* h, int32_t ticks_per_half_distance)
-{
- iter->h = h;
-
- hdr_iter_init(iter, h);
-
- iter->specifics.percentiles.seen_last_value = false;
- iter->specifics.percentiles.ticks_per_half_distance = ticks_per_half_distance;
- iter->specifics.percentiles.percentile_to_iterate_to = 0.0;
- iter->specifics.percentiles.percentile = 0.0;
-
- iter->_next_fp = _percentile_iter_next;
-}
-
-static void format_line_string(char* str, size_t len, int significant_figures, format_type format)
-{
-#if defined(_MSC_VER)
-#define snprintf _snprintf
-#pragma warning(push)
-#pragma warning(disable: 4996)
-#endif
- const char* format_str = "%s%d%s";
-
- switch (format)
- {
- case CSV:
- snprintf(str, len, format_str, "%.", significant_figures, "f,%f,%d,%.2f\n");
- break;
- case CLASSIC:
- snprintf(str, len, format_str, "%12.", significant_figures, "f %12f %12d %12.2f\n");
- break;
- default:
- snprintf(str, len, format_str, "%12.", significant_figures, "f %12f %12d %12.2f\n");
- }
-#if defined(_MSC_VER)
-#undef snprintf
-#pragma warning(pop)
-#endif
-}
-
-
-/* ######## ######## ###### ####### ######## ######## ######## ######## */
-/* ## ## ## ## ## ## ## ## ## ## ## ## ## ## */
-/* ## ## ## ## ## ## ## ## ## ## ## ## ## */
-/* ######## ###### ## ## ## ######## ## ## ###### ## ## */
-/* ## ## ## ## ## ## ## ## ## ## ## ## ## */
-/* ## ## ## ## ## ## ## ## ## ## ## ## ## ## */
-/* ## ## ######## ###### ####### ## ## ######## ######## ######## */
-
-
-static bool _recorded_iter_next(struct hdr_iter* iter)
-{
- while (_basic_iter_next(iter))
- {
- if (iter->count != 0)
- {
- _update_iterated_values(iter, iter->value);
-
- iter->specifics.recorded.count_added_in_this_iteration_step = iter->count;
- return true;
- }
- }
-
- return false;
-}
-
-void hdr_iter_recorded_init(struct hdr_iter* iter, const struct hdr_histogram* h)
-{
- hdr_iter_init(iter, h);
-
- iter->specifics.recorded.count_added_in_this_iteration_step = 0;
-
- iter->_next_fp = _recorded_iter_next;
-}
-
-/* ## #### ## ## ######## ### ######## */
-/* ## ## ### ## ## ## ## ## ## */
-/* ## ## #### ## ## ## ## ## ## */
-/* ## ## ## ## ## ###### ## ## ######## */
-/* ## ## ## #### ## ######### ## ## */
-/* ## ## ## ### ## ## ## ## ## */
-/* ######## #### ## ## ######## ## ## ## ## */
-
-
-static bool _iter_linear_next(struct hdr_iter* iter)
-{
- struct hdr_iter_linear* linear = &iter->specifics.linear;
-
- linear->count_added_in_this_iteration_step = 0;
-
- if (has_next(iter) ||
- next_value_greater_than_reporting_level_upper_bound(
- iter, linear->next_value_reporting_level_lowest_equivalent))
- {
- do
- {
- if (iter->value >= linear->next_value_reporting_level_lowest_equivalent)
- {
- _update_iterated_values(iter, linear->next_value_reporting_level);
-
- linear->next_value_reporting_level += linear->value_units_per_bucket;
- linear->next_value_reporting_level_lowest_equivalent =
- lowest_equivalent_value(iter->h, linear->next_value_reporting_level);
-
- return true;
- }
-
- if (!move_next(iter))
- {
- return true;
- }
-
- linear->count_added_in_this_iteration_step += iter->count;
- }
- while (true);
- }
-
- return false;
-}
-
-
-void hdr_iter_linear_init(struct hdr_iter* iter, const struct hdr_histogram* h, int64_t value_units_per_bucket)
-{
- hdr_iter_init(iter, h);
-
- iter->specifics.linear.count_added_in_this_iteration_step = 0;
- iter->specifics.linear.value_units_per_bucket = value_units_per_bucket;
- iter->specifics.linear.next_value_reporting_level = value_units_per_bucket;
- iter->specifics.linear.next_value_reporting_level_lowest_equivalent = lowest_equivalent_value(h, value_units_per_bucket);
-
- iter->_next_fp = _iter_linear_next;
-}
-
-/* ## ####### ###### ### ######## #### ######## ## ## ## ## #### ###### */
-/* ## ## ## ## ## ## ## ## ## ## ## ## ## ### ### ## ## ## */
-/* ## ## ## ## ## ## ## ## ## ## ## ## #### #### ## ## */
-/* ## ## ## ## #### ## ## ######## ## ## ######### ## ### ## ## ## */
-/* ## ## ## ## ## ######### ## ## ## ## ## ## ## ## ## ## */
-/* ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## */
-/* ######## ####### ###### ## ## ## ## #### ## ## ## ## ## #### ###### */
-
-static bool _log_iter_next(struct hdr_iter *iter)
-{
- struct hdr_iter_log* logarithmic = &iter->specifics.log;
-
- logarithmic->count_added_in_this_iteration_step = 0;
-
- if (has_next(iter) ||
- next_value_greater_than_reporting_level_upper_bound(
- iter, logarithmic->next_value_reporting_level_lowest_equivalent))
- {
- do
- {
- if (iter->value >= logarithmic->next_value_reporting_level_lowest_equivalent)
- {
- _update_iterated_values(iter, logarithmic->next_value_reporting_level);
-
- logarithmic->next_value_reporting_level *= (int64_t)logarithmic->log_base;
- logarithmic->next_value_reporting_level_lowest_equivalent = lowest_equivalent_value(iter->h, logarithmic->next_value_reporting_level);
-
- return true;
- }
-
- if (!move_next(iter))
- {
- return true;
- }
-
- logarithmic->count_added_in_this_iteration_step += iter->count;
- }
- while (true);
- }
-
- return false;
-}
-
-void hdr_iter_log_init(
- struct hdr_iter* iter,
- const struct hdr_histogram* h,
- int64_t value_units_first_bucket,
- double log_base)
-{
- hdr_iter_init(iter, h);
- iter->specifics.log.count_added_in_this_iteration_step = 0;
- iter->specifics.log.log_base = log_base;
- iter->specifics.log.next_value_reporting_level = value_units_first_bucket;
- iter->specifics.log.next_value_reporting_level_lowest_equivalent = lowest_equivalent_value(h, value_units_first_bucket);
-
- iter->_next_fp = _log_iter_next;
-}
-
-/* Printing. */
-
-static const char* format_head_string(format_type format)
-{
- switch (format)
- {
- case CSV:
- return "%s,%s,%s,%s\n";
- case CLASSIC:
- return "%12s %12s %12s %12s\n\n";
- default:
- return "%12s %12s %12s %12s\n\n";
- }
-}
-
-static const char CLASSIC_FOOTER[] =
- "#[Mean = %12.3f, StdDeviation = %12.3f]\n"
- "#[Max = %12.3f, Total count = %12" PRIu64 "]\n"
- "#[Buckets = %12d, SubBuckets = %12d]\n";
-
-int hdr_percentiles_print(
- struct hdr_histogram* h, FILE* stream, int32_t ticks_per_half_distance,
- double value_scale, format_type format)
-{
- char line_format[25];
- const char* head_format;
- int rc = 0;
- struct hdr_iter iter;
- struct hdr_iter_percentiles * percentiles;
-
- format_line_string(line_format, 25, h->significant_figures, format);
- head_format = format_head_string(format);
-
- hdr_iter_percentile_init(&iter, h, ticks_per_half_distance);
-
- if (fprintf(
- stream, head_format,
- "Value", "Percentile", "TotalCount", "1/(1-Percentile)") < 0)
- {
- rc = EIO;
- goto cleanup;
- }
-
- percentiles = &iter.specifics.percentiles;
- while (hdr_iter_next(&iter))
- {
- double value = iter.highest_equivalent_value / value_scale;
- double percentile = percentiles->percentile / 100.0;
- int64_t total_count = iter.cumulative_count;
- double inverted_percentile = (1.0 / (1.0 - percentile));
-
- if (fprintf(
- stream, line_format, value, percentile, total_count, inverted_percentile) < 0)
- {
- rc = EIO;
- goto cleanup;
- }
- }
-
- if (CLASSIC == format)
- {
- double mean = hdr_mean(h) / value_scale;
- double stddev = hdr_stddev(h) / value_scale;
- double max = hdr_max(h) / value_scale;
-
- if (fprintf(
- stream, CLASSIC_FOOTER, mean, stddev, max,
- h->total_count, h->bucket_count, h->sub_bucket_count) < 0)
- {
- rc = EIO;
- goto cleanup;
- }
- }
-
- cleanup:
- return rc;
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-19 23:20:31 +0000