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Diffstat (limited to 'test/core/support/histogram_test.c')
| -rw-r--r-- | test/core/support/histogram_test.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/test/core/support/histogram_test.c b/test/core/support/histogram_test.c new file mode 100644 index 0000000000..3b5fd73047 --- /dev/null +++ b/test/core/support/histogram_test.c @@ -0,0 +1,178 @@ +/* + * + * Copyright 2014, 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() gpr_log(GPR_INFO, "%s", __FUNCTION__); + +static void test_no_op() { + 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() { + gpr_histogram *h; + + LOG_TEST(); + + 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() { + gpr_histogram *h; + double last; + double i; + double cur; + + LOG_TEST(); + + 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() { + gpr_histogram *h1, *h2; + double last; + double i; + double cur; + + LOG_TEST(); + + 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; +} |