| /* |
| * |
| * Copyright 2015 gRPC authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| #include "test/core/util/histogram.h" |
| #include <grpc/support/log.h> |
| |
| #define LOG_TEST(x) gpr_log(GPR_INFO, "%s", x); |
| |
| static void test_no_op(void) { |
| grpc_histogram_destroy(grpc_histogram_create(0.01, 60e9)); |
| } |
| |
| static void expect_percentile(grpc_histogram* h, double percentile, |
| double min_expect, double max_expect) { |
| double got = grpc_histogram_percentile(h, percentile); |
| gpr_log(GPR_INFO, "@%f%%, expect %f <= %f <= %f", percentile, min_expect, got, |
| max_expect); |
| GPR_ASSERT(min_expect <= got); |
| GPR_ASSERT(got <= max_expect); |
| } |
| |
| static void test_simple(void) { |
| grpc_histogram* h; |
| |
| LOG_TEST("test_simple"); |
| |
| h = grpc_histogram_create(0.01, 60e9); |
| grpc_histogram_add(h, 10000); |
| grpc_histogram_add(h, 10000); |
| grpc_histogram_add(h, 11000); |
| grpc_histogram_add(h, 11000); |
| |
| expect_percentile(h, 50, 10001, 10999); |
| GPR_ASSERT(grpc_histogram_mean(h) == 10500); |
| |
| grpc_histogram_destroy(h); |
| } |
| |
| static void test_percentile(void) { |
| grpc_histogram* h; |
| double last; |
| double i; |
| double cur; |
| |
| LOG_TEST("test_percentile"); |
| |
| h = grpc_histogram_create(0.05, 1e9); |
| grpc_histogram_add(h, 2.5); |
| grpc_histogram_add(h, 2.5); |
| grpc_histogram_add(h, 8); |
| grpc_histogram_add(h, 4); |
| |
| GPR_ASSERT(grpc_histogram_count(h) == 4); |
| GPR_ASSERT(grpc_histogram_minimum(h) == 2.5); |
| GPR_ASSERT(grpc_histogram_maximum(h) == 8); |
| GPR_ASSERT(grpc_histogram_sum(h) == 17); |
| GPR_ASSERT(grpc_histogram_sum_of_squares(h) == 92.5); |
| GPR_ASSERT(grpc_histogram_mean(h) == 4.25); |
| GPR_ASSERT(grpc_histogram_variance(h) == 5.0625); |
| GPR_ASSERT(grpc_histogram_stddev(h) == 2.25); |
| |
| expect_percentile(h, -10, 2.5, 2.5); |
| expect_percentile(h, 0, 2.5, 2.5); |
| expect_percentile(h, 12.5, 2.5, 2.5); |
| expect_percentile(h, 25, 2.5, 2.5); |
| expect_percentile(h, 37.5, 2.5, 2.8); |
| expect_percentile(h, 50, 3.0, 3.5); |
| expect_percentile(h, 62.5, 3.5, 4.5); |
| expect_percentile(h, 75, 5, 7.9); |
| expect_percentile(h, 100, 8, 8); |
| expect_percentile(h, 110, 8, 8); |
| |
| /* test monotonicity */ |
| last = 0.0; |
| for (i = 0; i < 100.0; i += 0.01) { |
| cur = grpc_histogram_percentile(h, i); |
| GPR_ASSERT(cur >= last); |
| last = cur; |
| } |
| |
| grpc_histogram_destroy(h); |
| } |
| |
| static void test_merge(void) { |
| grpc_histogram *h1, *h2; |
| double last; |
| double i; |
| double cur; |
| |
| LOG_TEST("test_merge"); |
| |
| h1 = grpc_histogram_create(0.05, 1e9); |
| grpc_histogram_add(h1, 2.5); |
| grpc_histogram_add(h1, 2.5); |
| grpc_histogram_add(h1, 8); |
| grpc_histogram_add(h1, 4); |
| |
| h2 = grpc_histogram_create(0.01, 1e9); |
| GPR_ASSERT(grpc_histogram_merge(h1, h2) == 0); |
| grpc_histogram_destroy(h2); |
| |
| h2 = grpc_histogram_create(0.05, 1e10); |
| GPR_ASSERT(grpc_histogram_merge(h1, h2) == 0); |
| grpc_histogram_destroy(h2); |
| |
| h2 = grpc_histogram_create(0.05, 1e9); |
| GPR_ASSERT(grpc_histogram_merge(h1, h2) == 1); |
| GPR_ASSERT(grpc_histogram_count(h1) == 4); |
| GPR_ASSERT(grpc_histogram_minimum(h1) == 2.5); |
| GPR_ASSERT(grpc_histogram_maximum(h1) == 8); |
| GPR_ASSERT(grpc_histogram_sum(h1) == 17); |
| GPR_ASSERT(grpc_histogram_sum_of_squares(h1) == 92.5); |
| GPR_ASSERT(grpc_histogram_mean(h1) == 4.25); |
| GPR_ASSERT(grpc_histogram_variance(h1) == 5.0625); |
| GPR_ASSERT(grpc_histogram_stddev(h1) == 2.25); |
| grpc_histogram_destroy(h2); |
| |
| h2 = grpc_histogram_create(0.05, 1e9); |
| grpc_histogram_add(h2, 7.0); |
| grpc_histogram_add(h2, 17.0); |
| grpc_histogram_add(h2, 1.0); |
| GPR_ASSERT(grpc_histogram_merge(h1, h2) == 1); |
| GPR_ASSERT(grpc_histogram_count(h1) == 7); |
| GPR_ASSERT(grpc_histogram_minimum(h1) == 1.0); |
| GPR_ASSERT(grpc_histogram_maximum(h1) == 17.0); |
| GPR_ASSERT(grpc_histogram_sum(h1) == 42.0); |
| GPR_ASSERT(grpc_histogram_sum_of_squares(h1) == 431.5); |
| GPR_ASSERT(grpc_histogram_mean(h1) == 6.0); |
| |
| /* test monotonicity */ |
| last = 0.0; |
| for (i = 0; i < 100.0; i += 0.01) { |
| cur = grpc_histogram_percentile(h1, i); |
| GPR_ASSERT(cur >= last); |
| last = cur; |
| } |
| |
| grpc_histogram_destroy(h1); |
| grpc_histogram_destroy(h2); |
| } |
| |
| int main(void) { |
| test_no_op(); |
| test_simple(); |
| test_percentile(); |
| test_merge(); |
| return 0; |
| } |