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/*
*
* Copyright 2017 gRPC authors.
*
* 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 "src/core/lib/debug/stats.h"
#include <mutex>
#include <thread>
#include <grpc/grpc.h>
#include <grpc/support/cpu.h>
#include <grpc/support/log.h>
#include <gtest/gtest.h>
namespace grpc {
namespace testing {
class Snapshot {
public:
Snapshot() { grpc_stats_collect(&begin_); }
grpc_stats_data delta() {
grpc_stats_data now;
grpc_stats_collect(&now);
grpc_stats_data delta;
grpc_stats_diff(&now, &begin_, &delta);
return delta;
}
private:
grpc_stats_data begin_;
};
TEST(StatsTest, IncCounters) {
for (int i = 0; i < GRPC_STATS_COUNTER_COUNT; i++) {
std::unique_ptr<Snapshot> snapshot(new Snapshot);
grpc_core::ExecCtx exec_ctx;
GRPC_STATS_INC_COUNTER((grpc_stats_counters)i);
EXPECT_EQ(snapshot->delta().counters[i], 1);
}
}
TEST(StatsTest, IncSpecificCounter) {
std::unique_ptr<Snapshot> snapshot(new Snapshot);
grpc_core::ExecCtx exec_ctx;
GRPC_STATS_INC_SYSCALL_POLL();
EXPECT_EQ(snapshot->delta().counters[GRPC_STATS_COUNTER_SYSCALL_POLL], 1);
}
static int FindExpectedBucket(int i, int j) {
if (j < 0) {
return 0;
}
if (j >= grpc_stats_histo_bucket_boundaries[i][grpc_stats_histo_buckets[i]]) {
return grpc_stats_histo_buckets[i] - 1;
}
return std::upper_bound(grpc_stats_histo_bucket_boundaries[i],
grpc_stats_histo_bucket_boundaries[i] +
grpc_stats_histo_buckets[i],
j) -
grpc_stats_histo_bucket_boundaries[i] - 1;
}
class HistogramTest : public ::testing::TestWithParam<int> {};
TEST_P(HistogramTest, IncHistogram) {
const int kHistogram = GetParam();
std::vector<std::thread> threads;
int cur_bucket = 0;
auto run = [kHistogram](const std::vector<int>& test_values,
int expected_bucket) {
gpr_log(GPR_DEBUG, "expected_bucket:%d nvalues=%" PRIdPTR, expected_bucket,
test_values.size());
for (auto j : test_values) {
std::unique_ptr<Snapshot> snapshot(new Snapshot);
grpc_core::ExecCtx exec_ctx;
grpc_stats_inc_histogram[kHistogram](j);
auto delta = snapshot->delta();
EXPECT_EQ(
delta
.histograms[grpc_stats_histo_start[kHistogram] + expected_bucket],
1)
<< "\nhistogram:" << kHistogram
<< "\nexpected_bucket:" << expected_bucket << "\nj:" << j;
}
};
std::vector<int> test_values;
// largest bucket boundary for current histogram type.
int max_bucket_boundary =
grpc_stats_histo_bucket_boundaries[kHistogram]
[grpc_stats_histo_buckets[kHistogram] -
1];
for (int j = -1000; j < max_bucket_boundary + 1000;) {
int expected_bucket = FindExpectedBucket(kHistogram, j);
if (cur_bucket != expected_bucket) {
threads.emplace_back(
[test_values, run, cur_bucket]() { run(test_values, cur_bucket); });
cur_bucket = expected_bucket;
test_values.clear();
}
test_values.push_back(j);
if (j < max_bucket_boundary &&
FindExpectedBucket(kHistogram, j + 1000) == expected_bucket &&
FindExpectedBucket(kHistogram, j - 1000) == expected_bucket) {
// if we are far from bucket boundary, skip values to speed-up the tests
j += 500;
} else {
j++;
}
}
run(test_values, cur_bucket);
for (auto& t : threads) {
t.join();
}
}
INSTANTIATE_TEST_CASE_P(HistogramTestCases, HistogramTest,
::testing::Range<int>(0, GRPC_STATS_HISTOGRAM_COUNT));
} // namespace testing
} // namespace grpc
int main(int argc, char** argv) {
/* Only run this test if GRPC_COLLECT_STATS is defined or if it is a debug
* build.
*/
#if defined(GRPC_COLLECT_STATS) || !defined(NDEBUG)
::testing::InitGoogleTest(&argc, argv);
grpc_init();
int ret = RUN_ALL_TESTS();
grpc_shutdown();
return ret;
#endif
}
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