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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/vespalib/testkit/test_kit.h>
#include <vespa/vespalib/util/benchmark_timer.h>
#include <thread>
using namespace vespalib;
TEST("require that the benchmark timer can be used as advertised") {
BenchmarkTimer timer(1.0);
while (timer.has_budget()) {
timer.before();
std::this_thread::sleep_for(std::chrono::milliseconds(5));
timer.after();
}
EXPECT_TRUE(timer.min_time() >= 0.0);
fprintf(stderr, "5 ms sleep takes: %g ms\n", timer.min_time() * 1000.0);
}
TEST("require that the benchmark timer all-in-one benchmarking works") {
uint32_t sleep_time = 5;
double t = BenchmarkTimer::benchmark([sleep_time](){std::this_thread::sleep_for(std::chrono::milliseconds(sleep_time));}, 1.0);
fprintf(stderr, "5 ms sleep takes: %g ms\n", t * 1000.0);
}
TEST("require that the benchmark timer all-in-one benchmarking with baseline works") {
uint32_t work_time = 10;
uint32_t baseline_time = 5;
double t = BenchmarkTimer::benchmark([&](){std::this_thread::sleep_for(std::chrono::milliseconds(work_time));},
[&](){std::this_thread::sleep_for(std::chrono::milliseconds(baseline_time));}, 1.0);
fprintf(stderr, "10 ms sleep - 5 ms sleep takes: %g ms\n", t * 1000.0);
}
TEST("require that the benchmark timer all-in-one benchmarking with baseline and specified loop count works") {
uint32_t work_time = 2;
uint32_t baseline_time = 1;
uint32_t loop_cnt = 0;
double t = BenchmarkTimer::benchmark([&](){std::this_thread::sleep_for(std::chrono::milliseconds(work_time)); ++loop_cnt;},
[&](){std::this_thread::sleep_for(std::chrono::milliseconds(baseline_time));}, 7, 0.0);
EXPECT_EQUAL(loop_cnt, 7u);
fprintf(stderr, "2 ms sleep - 1 ms sleep takes: %g ms\n", t * 1000.0);
}
TEST_MAIN() { TEST_RUN_ALL(); }
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