blob: ba778efbe5cc734d5af1bf530b315cae20caa808 [file] [log] [blame]
/*
* Copyright 2015 Facebook, Inc.
*
* 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 <folly/Logging.h>
#include <gflags/gflags.h>
#include <gtest/gtest.h>
#include <folly/Benchmark.h>
#include <vector>
TEST(LogEveryMs, basic) {
std::vector<std::chrono::steady_clock::time_point> hist;
while (hist.size() < 10) {
FB_LOG_EVERY_MS(INFO, 10)
<< "test msg " << (hist.push_back(std::chrono::steady_clock::now()),
hist.size());
}
bool atLeastOneIsGood = false;
for (size_t i = 0; i < hist.size() - 1; ++i) {
auto delta = hist[i + 1] - hist[i];
if (delta > std::chrono::milliseconds(5) &&
delta < std::chrono::milliseconds(15)) {
atLeastOneIsGood = true;
}
}
EXPECT_TRUE(atLeastOneIsGood);
}
TEST(LogEveryMs, zero) {
int count = 0;
for (int i = 0; i < 10; ++i) {
FB_LOG_EVERY_MS(INFO, 0)
<< "test msg " << ++count;
}
EXPECT_EQ(10, count);
}
BENCHMARK(skip_overhead, iter) {
auto prev = FLAGS_minloglevel;
FLAGS_minloglevel = 2;
for (unsigned i = 0; i < iter; ++i) {
FB_LOG_EVERY_MS(INFO, 1000) << "every 1s";
}
FLAGS_minloglevel = prev;
}
BENCHMARK(dev_null_log_overhead, iter) {
auto prev = FLAGS_minloglevel;
FLAGS_minloglevel = 2;
for (unsigned i = 0; i < iter; ++i) {
FB_LOG_EVERY_MS(INFO, -1) << "every -1ms";
}
FLAGS_minloglevel = prev;
}
// ============================================================================
// folly/test/LoggingTest.cpp relative time/iter iters/s
// ============================================================================
// skip_overhead 36.37ns 27.49M
// dev_null_log_overhead 2.61us 382.57K
// ============================================================================
int main(int argc, char** argv) {
testing::InitGoogleTest(&argc, argv);
gflags::ParseCommandLineFlags(&argc, &argv, true);
auto rv = RUN_ALL_TESTS();
if (!rv && FLAGS_benchmark) {
folly::runBenchmarks();
}
return rv;
}