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/*
*
* Copyright 2015, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "src/core/lib/iomgr/time_averaged_stats.h"
#include <math.h>
#include <grpc/support/log.h>
#include "test/core/util/test_config.h"
#define EXPECT_EQ(a, b) GPR_ASSERT((a) == (b))
#define EXPECT_DOUBLE_EQ(a, b) GPR_ASSERT(fabs((a) - (b)) < 1e-9)
static void no_regress_no_persist_test_1(void) {
grpc_time_averaged_stats tas;
grpc_time_averaged_stats_init(&tas, 1000, 0, 0.0);
EXPECT_DOUBLE_EQ(1000, tas.aggregate_weighted_avg);
EXPECT_DOUBLE_EQ(0, tas.aggregate_total_weight);
/* Should have no effect */
grpc_time_averaged_stats_update_average(&tas);
EXPECT_DOUBLE_EQ(1000, tas.aggregate_weighted_avg);
EXPECT_DOUBLE_EQ(0, tas.aggregate_total_weight);
/* Should replace old average */
grpc_time_averaged_stats_add_sample(&tas, 2000);
grpc_time_averaged_stats_update_average(&tas);
EXPECT_DOUBLE_EQ(2000, tas.aggregate_weighted_avg);
EXPECT_DOUBLE_EQ(1, tas.aggregate_total_weight);
}
static void no_regress_no_persist_test_2(void) {
grpc_time_averaged_stats tas;
grpc_time_averaged_stats_init(&tas, 1000, 0, 0.0);
EXPECT_DOUBLE_EQ(1000, tas.aggregate_weighted_avg);
/* Should replace init value */
grpc_time_averaged_stats_add_sample(&tas, 2000);
grpc_time_averaged_stats_update_average(&tas);
EXPECT_DOUBLE_EQ(2000, tas.aggregate_weighted_avg);
EXPECT_DOUBLE_EQ(1, tas.aggregate_total_weight);
grpc_time_averaged_stats_add_sample(&tas, 3000);
grpc_time_averaged_stats_update_average(&tas);
EXPECT_DOUBLE_EQ(3000, tas.aggregate_weighted_avg);
EXPECT_DOUBLE_EQ(1, tas.aggregate_total_weight);
}
static void no_regress_no_persist_test_3(void) {
grpc_time_averaged_stats tas;
grpc_time_averaged_stats_init(&tas, 1000, 0, 0.0);
EXPECT_DOUBLE_EQ(1000, tas.aggregate_weighted_avg);
/* Should replace init value */
grpc_time_averaged_stats_add_sample(&tas, 2500);
grpc_time_averaged_stats_update_average(&tas);
EXPECT_DOUBLE_EQ(2500, tas.aggregate_weighted_avg);
EXPECT_DOUBLE_EQ(1, tas.aggregate_total_weight);
grpc_time_averaged_stats_add_sample(&tas, 3500);
grpc_time_averaged_stats_add_sample(&tas, 4500);
grpc_time_averaged_stats_update_average(&tas);
EXPECT_DOUBLE_EQ(4000, tas.aggregate_weighted_avg);
EXPECT_DOUBLE_EQ(2, tas.aggregate_total_weight);
}
static void some_regress_no_persist_test(void) {
grpc_time_averaged_stats tas;
grpc_time_averaged_stats_init(&tas, 1000, 0.5, 0.0);
EXPECT_DOUBLE_EQ(1000, tas.aggregate_weighted_avg);
EXPECT_DOUBLE_EQ(0, tas.aggregate_total_weight);
grpc_time_averaged_stats_add_sample(&tas, 2000);
grpc_time_averaged_stats_add_sample(&tas, 2000);
grpc_time_averaged_stats_update_average(&tas);
/* (2 * 2000 + 0.5 * 1000) / 2.5 */
EXPECT_DOUBLE_EQ(1800, tas.aggregate_weighted_avg);
EXPECT_DOUBLE_EQ(2.5, tas.aggregate_total_weight);
}
static void some_decay_test(void) {
grpc_time_averaged_stats tas;
grpc_time_averaged_stats_init(&tas, 1000, 1, 0.0);
EXPECT_EQ(1000, tas.aggregate_weighted_avg);
/* Should avg with init value */
grpc_time_averaged_stats_add_sample(&tas, 2000);
grpc_time_averaged_stats_update_average(&tas);
EXPECT_DOUBLE_EQ(1500, tas.aggregate_weighted_avg);
EXPECT_DOUBLE_EQ(2, tas.aggregate_total_weight);
grpc_time_averaged_stats_add_sample(&tas, 2000);
grpc_time_averaged_stats_update_average(&tas);
EXPECT_DOUBLE_EQ(1500, tas.aggregate_weighted_avg);
EXPECT_DOUBLE_EQ(2, tas.aggregate_total_weight);
grpc_time_averaged_stats_add_sample(&tas, 2000);
grpc_time_averaged_stats_update_average(&tas);
EXPECT_DOUBLE_EQ(1500, tas.aggregate_weighted_avg);
EXPECT_DOUBLE_EQ(2, tas.aggregate_total_weight);
}
static void no_regress_full_persist_test(void) {
grpc_time_averaged_stats tas;
grpc_time_averaged_stats_init(&tas, 1000, 0, 1.0);
EXPECT_DOUBLE_EQ(1000, tas.aggregate_weighted_avg);
EXPECT_DOUBLE_EQ(0, tas.aggregate_total_weight);
/* Should replace init value */
grpc_time_averaged_stats_add_sample(&tas, 2000);
grpc_time_averaged_stats_update_average(&tas);
EXPECT_EQ(2000, tas.aggregate_weighted_avg);
EXPECT_EQ(1, tas.aggregate_total_weight);
/* Will result in average of the 3 samples. */
grpc_time_averaged_stats_add_sample(&tas, 2300);
grpc_time_averaged_stats_add_sample(&tas, 2300);
grpc_time_averaged_stats_update_average(&tas);
EXPECT_DOUBLE_EQ(2200, tas.aggregate_weighted_avg);
EXPECT_DOUBLE_EQ(3, tas.aggregate_total_weight);
}
static void no_regress_some_persist_test(void) {
grpc_time_averaged_stats tas;
grpc_time_averaged_stats_init(&tas, 1000, 0, 0.5);
/* Should replace init value */
grpc_time_averaged_stats_add_sample(&tas, 2000);
grpc_time_averaged_stats_update_average(&tas);
EXPECT_DOUBLE_EQ(2000, tas.aggregate_weighted_avg);
EXPECT_DOUBLE_EQ(1, tas.aggregate_total_weight);
grpc_time_averaged_stats_add_sample(&tas, 2500);
grpc_time_averaged_stats_add_sample(&tas, 4000);
grpc_time_averaged_stats_update_average(&tas);
EXPECT_DOUBLE_EQ(3000, tas.aggregate_weighted_avg);
EXPECT_DOUBLE_EQ(2.5, tas.aggregate_total_weight);
}
static void some_regress_some_persist_test(void) {
grpc_time_averaged_stats tas;
grpc_time_averaged_stats_init(&tas, 1000, 0.4, 0.6);
/* Sample weight = 0 */
EXPECT_EQ(1000, tas.aggregate_weighted_avg);
EXPECT_EQ(0, tas.aggregate_total_weight);
grpc_time_averaged_stats_update_average(&tas);
/* (0.6 * 0 * 1000 + 0.4 * 1000 / 0.4) */
EXPECT_DOUBLE_EQ(1000, tas.aggregate_weighted_avg);
EXPECT_DOUBLE_EQ(0.4, tas.aggregate_total_weight);
grpc_time_averaged_stats_add_sample(&tas, 2640);
grpc_time_averaged_stats_update_average(&tas);
/* (1 * 2640 + 0.6 * 0.4 * 1000 + 0.4 * 1000 / (1 + 0.6 * 0.4 + 0.4) */
EXPECT_DOUBLE_EQ(2000, tas.aggregate_weighted_avg);
EXPECT_DOUBLE_EQ(1.64, tas.aggregate_total_weight);
grpc_time_averaged_stats_add_sample(&tas, 2876.8);
grpc_time_averaged_stats_update_average(&tas);
/* (1 * 2876.8 + 0.6 * 1.64 * 2000 + 0.4 * 1000 / (1 + 0.6 * 1.64 + 0.4) */
EXPECT_DOUBLE_EQ(2200, tas.aggregate_weighted_avg);
EXPECT_DOUBLE_EQ(2.384, tas.aggregate_total_weight);
grpc_time_averaged_stats_add_sample(&tas, 4944.32);
grpc_time_averaged_stats_update_average(&tas);
/* (1 * 4944.32 + 0.6 * 2.384 * 2200 + 0.4 * 1000) /
(1 + 0.6 * 2.384 + 0.4) */
EXPECT_DOUBLE_EQ(3000, tas.aggregate_weighted_avg);
EXPECT_DOUBLE_EQ(2.8304, tas.aggregate_total_weight);
}
int main(int argc, char **argv) {
grpc_test_init(argc, argv);
no_regress_no_persist_test_1();
no_regress_no_persist_test_2();
no_regress_no_persist_test_3();
some_regress_no_persist_test();
some_decay_test();
no_regress_full_persist_test();
no_regress_some_persist_test();
some_regress_some_persist_test();
return 0;
}
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