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/*
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*
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* Copyright 2017 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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#include "src/core/lib/debug/stats.h"
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#include <mutex>
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#include <thread>
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#include <grpc/grpc.h>
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#include <grpc/support/cpu.h>
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#include <grpc/support/log.h>
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#include <gtest/gtest.h>
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namespace grpc {
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namespace testing {
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class Snapshot {
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public:
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Snapshot() { grpc_stats_collect(&begin_); }
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grpc_stats_data delta() {
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grpc_stats_data now;
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grpc_stats_collect(&now);
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grpc_stats_data delta;
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grpc_stats_diff(&now, &begin_, &delta);
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return delta;
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}
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private:
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grpc_stats_data begin_;
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};
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TEST(StatsTest, IncCounters) {
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for (int i = 0; i < GRPC_STATS_COUNTER_COUNT; i++) {
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std::unique_ptr<Snapshot> snapshot(new Snapshot);
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grpc_core::ExecCtx exec_ctx;
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GRPC_STATS_INC_COUNTER((grpc_stats_counters)i);
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EXPECT_EQ(snapshot->delta().counters[i], 1);
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}
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}
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TEST(StatsTest, IncSpecificCounter) {
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std::unique_ptr<Snapshot> snapshot(new Snapshot);
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grpc_core::ExecCtx exec_ctx;
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GRPC_STATS_INC_SYSCALL_POLL();
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EXPECT_EQ(snapshot->delta().counters[GRPC_STATS_COUNTER_SYSCALL_POLL], 1);
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}
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static int FindExpectedBucket(int i, int j) {
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if (j < 0) {
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return 0;
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}
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if (j >= grpc_stats_histo_bucket_boundaries[i][grpc_stats_histo_buckets[i]]) {
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return grpc_stats_histo_buckets[i] - 1;
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}
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return std::upper_bound(grpc_stats_histo_bucket_boundaries[i],
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grpc_stats_histo_bucket_boundaries[i] +
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grpc_stats_histo_buckets[i],
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j) -
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grpc_stats_histo_bucket_boundaries[i] - 1;
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}
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class HistogramTest : public ::testing::TestWithParam<int> {};
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TEST_P(HistogramTest, IncHistogram) {
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const int kHistogram = GetParam();
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std::vector<std::thread> threads;
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int cur_bucket = 0;
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auto run = [kHistogram](const std::vector<int>& test_values,
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int expected_bucket) {
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gpr_log(GPR_DEBUG, "expected_bucket:%d nvalues=%" PRIdPTR, expected_bucket,
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test_values.size());
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for (auto j : test_values) {
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std::unique_ptr<Snapshot> snapshot(new Snapshot);
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grpc_core::ExecCtx exec_ctx;
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grpc_stats_inc_histogram[kHistogram](j);
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auto delta = snapshot->delta();
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EXPECT_EQ(
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delta
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.histograms[grpc_stats_histo_start[kHistogram] + expected_bucket],
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1)
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<< "\nhistogram:" << kHistogram
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<< "\nexpected_bucket:" << expected_bucket << "\nj:" << j;
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}
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};
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std::vector<int> test_values;
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// largest bucket boundary for current histogram type.
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int max_bucket_boundary =
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grpc_stats_histo_bucket_boundaries[kHistogram]
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[grpc_stats_histo_buckets[kHistogram] -
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1];
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for (int j = -1000; j < max_bucket_boundary + 1000;) {
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int expected_bucket = FindExpectedBucket(kHistogram, j);
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if (cur_bucket != expected_bucket) {
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threads.emplace_back(
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[test_values, run, cur_bucket]() { run(test_values, cur_bucket); });
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cur_bucket = expected_bucket;
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test_values.clear();
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}
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test_values.push_back(j);
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if (j < max_bucket_boundary &&
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FindExpectedBucket(kHistogram, j + 1000) == expected_bucket &&
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FindExpectedBucket(kHistogram, j - 1000) == expected_bucket) {
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// if we are far from bucket boundary, skip values to speed-up the tests
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j += 500;
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} else {
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j++;
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}
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}
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run(test_values, cur_bucket);
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for (auto& t : threads) {
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t.join();
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}
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}
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INSTANTIATE_TEST_SUITE_P(HistogramTestCases, HistogramTest,
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::testing::Range<int>(0, GRPC_STATS_HISTOGRAM_COUNT));
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} // namespace testing
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} // namespace grpc
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int main(int argc, char** argv) {
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/* Only run this test if GRPC_COLLECT_STATS is defined or if it is a debug
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* build.
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*/
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#if defined(GRPC_COLLECT_STATS) || !defined(NDEBUG)
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::testing::InitGoogleTest(&argc, argv);
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grpc_init();
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int ret = RUN_ALL_TESTS();
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grpc_shutdown();
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return ret;
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#endif
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}
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