| /* |
| * |
| * 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 <grpc/support/histogram.h> |
| #include <grpc/support/log.h> |
| |
| #define LOG_TEST(x) gpr_log(GPR_INFO, "%s", x); |
| |
| static void test_no_op(void) { |
| gpr_histogram_destroy(gpr_histogram_create(0.01, 60e9)); |
| } |
| |
| static void expect_percentile(gpr_histogram *h, double percentile, |
| double min_expect, double max_expect) { |
| double got = gpr_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) { |
| gpr_histogram *h; |
| |
| LOG_TEST("test_simple"); |
| |
| h = gpr_histogram_create(0.01, 60e9); |
| gpr_histogram_add(h, 10000); |
| gpr_histogram_add(h, 10000); |
| gpr_histogram_add(h, 11000); |
| gpr_histogram_add(h, 11000); |
| |
| expect_percentile(h, 50, 10001, 10999); |
| GPR_ASSERT(gpr_histogram_mean(h) == 10500); |
| |
| gpr_histogram_destroy(h); |
| } |
| |
| static void test_percentile(void) { |
| gpr_histogram *h; |
| double last; |
| double i; |
| double cur; |
| |
| LOG_TEST("test_percentile"); |
| |
| h = gpr_histogram_create(0.05, 1e9); |
| gpr_histogram_add(h, 2.5); |
| gpr_histogram_add(h, 2.5); |
| gpr_histogram_add(h, 8); |
| gpr_histogram_add(h, 4); |
| |
| GPR_ASSERT(gpr_histogram_count(h) == 4); |
| GPR_ASSERT(gpr_histogram_minimum(h) == 2.5); |
| GPR_ASSERT(gpr_histogram_maximum(h) == 8); |
| GPR_ASSERT(gpr_histogram_sum(h) == 17); |
| GPR_ASSERT(gpr_histogram_sum_of_squares(h) == 92.5); |
| GPR_ASSERT(gpr_histogram_mean(h) == 4.25); |
| GPR_ASSERT(gpr_histogram_variance(h) == 5.0625); |
| GPR_ASSERT(gpr_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 = gpr_histogram_percentile(h, i); |
| GPR_ASSERT(cur >= last); |
| last = cur; |
| } |
| |
| gpr_histogram_destroy(h); |
| } |
| |
| static void test_merge(void) { |
| gpr_histogram *h1, *h2; |
| double last; |
| double i; |
| double cur; |
| |
| LOG_TEST("test_merge"); |
| |
| h1 = gpr_histogram_create(0.05, 1e9); |
| gpr_histogram_add(h1, 2.5); |
| gpr_histogram_add(h1, 2.5); |
| gpr_histogram_add(h1, 8); |
| gpr_histogram_add(h1, 4); |
| |
| h2 = gpr_histogram_create(0.01, 1e9); |
| GPR_ASSERT(gpr_histogram_merge(h1, h2) == 0); |
| gpr_histogram_destroy(h2); |
| |
| h2 = gpr_histogram_create(0.05, 1e10); |
| GPR_ASSERT(gpr_histogram_merge(h1, h2) == 0); |
| gpr_histogram_destroy(h2); |
| |
| h2 = gpr_histogram_create(0.05, 1e9); |
| GPR_ASSERT(gpr_histogram_merge(h1, h2) == 1); |
| GPR_ASSERT(gpr_histogram_count(h1) == 4); |
| GPR_ASSERT(gpr_histogram_minimum(h1) == 2.5); |
| GPR_ASSERT(gpr_histogram_maximum(h1) == 8); |
| GPR_ASSERT(gpr_histogram_sum(h1) == 17); |
| GPR_ASSERT(gpr_histogram_sum_of_squares(h1) == 92.5); |
| GPR_ASSERT(gpr_histogram_mean(h1) == 4.25); |
| GPR_ASSERT(gpr_histogram_variance(h1) == 5.0625); |
| GPR_ASSERT(gpr_histogram_stddev(h1) == 2.25); |
| gpr_histogram_destroy(h2); |
| |
| h2 = gpr_histogram_create(0.05, 1e9); |
| gpr_histogram_add(h2, 7.0); |
| gpr_histogram_add(h2, 17.0); |
| gpr_histogram_add(h2, 1.0); |
| GPR_ASSERT(gpr_histogram_merge(h1, h2) == 1); |
| GPR_ASSERT(gpr_histogram_count(h1) == 7); |
| GPR_ASSERT(gpr_histogram_minimum(h1) == 1.0); |
| GPR_ASSERT(gpr_histogram_maximum(h1) == 17.0); |
| GPR_ASSERT(gpr_histogram_sum(h1) == 42.0); |
| GPR_ASSERT(gpr_histogram_sum_of_squares(h1) == 431.5); |
| GPR_ASSERT(gpr_histogram_mean(h1) == 6.0); |
| |
| /* test monotonicity */ |
| last = 0.0; |
| for (i = 0; i < 100.0; i += 0.01) { |
| cur = gpr_histogram_percentile(h1, i); |
| GPR_ASSERT(cur >= last); |
| last = cur; |
| } |
| |
| gpr_histogram_destroy(h1); |
| gpr_histogram_destroy(h2); |
| } |
| |
| int main(void) { |
| test_no_op(); |
| test_simple(); |
| test_percentile(); |
| test_merge(); |
| return 0; |
| } |