| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you 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 <limits> //std::numeric_limits |
| #include "bvar/detail/sampler.h" |
| #include "butil/time.h" |
| #include "butil/logging.h" |
| #include <gtest/gtest.h> |
| |
| namespace { |
| |
| TEST(SamplerTest, linked_list) { |
| butil::LinkNode<bvar::detail::Sampler> n1, n2; |
| n1.InsertBeforeAsList(&n2); |
| ASSERT_EQ(n1.next(), &n2); |
| ASSERT_EQ(n1.previous(), &n2); |
| ASSERT_EQ(n2.next(), &n1); |
| ASSERT_EQ(n2.previous(), &n1); |
| |
| butil::LinkNode<bvar::detail::Sampler> n3, n4; |
| n3.InsertBeforeAsList(&n4); |
| ASSERT_EQ(n3.next(), &n4); |
| ASSERT_EQ(n3.previous(), &n4); |
| ASSERT_EQ(n4.next(), &n3); |
| ASSERT_EQ(n4.previous(), &n3); |
| |
| n1.InsertBeforeAsList(&n3); |
| ASSERT_EQ(n1.next(), &n2); |
| ASSERT_EQ(n2.next(), &n3); |
| ASSERT_EQ(n3.next(), &n4); |
| ASSERT_EQ(n4.next(), &n1); |
| ASSERT_EQ(&n1, n2.previous()); |
| ASSERT_EQ(&n2, n3.previous()); |
| ASSERT_EQ(&n3, n4.previous()); |
| ASSERT_EQ(&n4, n1.previous()); |
| } |
| |
| class DebugSampler : public bvar::detail::Sampler { |
| public: |
| DebugSampler() : _ncalled(0) {} |
| ~DebugSampler() { |
| ++_s_ndestroy; |
| } |
| void take_sample() { |
| ++_ncalled; |
| } |
| int called_count() const { return _ncalled; } |
| private: |
| int _ncalled; |
| static int _s_ndestroy; |
| }; |
| int DebugSampler::_s_ndestroy = 0; |
| |
| TEST(SamplerTest, single_threaded) { |
| #if !BRPC_WITH_GLOG |
| logging::StringSink log_str; |
| logging::LogSink* old_sink = logging::SetLogSink(&log_str); |
| #endif |
| const int N = 100; |
| DebugSampler* s[N]; |
| for (int i = 0; i < N; ++i) { |
| s[i] = new DebugSampler; |
| s[i]->schedule(); |
| } |
| usleep(1010000); |
| for (int i = 0; i < N; ++i) { |
| // LE: called once every second, may be called more than once |
| ASSERT_LE(1, s[i]->called_count()) << "i=" << i; |
| } |
| EXPECT_EQ(0, DebugSampler::_s_ndestroy); |
| for (int i = 0; i < N; ++i) { |
| s[i]->destroy(); |
| } |
| usleep(1010000); |
| EXPECT_EQ(N, DebugSampler::_s_ndestroy); |
| #if !BRPC_WITH_GLOG |
| ASSERT_EQ(&log_str, logging::SetLogSink(old_sink)); |
| if (log_str.find("Removed ") != std::string::npos) { |
| ASSERT_NE(std::string::npos, log_str.find("Removed 0, sampled 100")); |
| ASSERT_NE(std::string::npos, log_str.find("Removed 100, sampled 0")); |
| } |
| #endif |
| } |
| |
| static void* check(void*) { |
| const int N = 100; |
| DebugSampler* s[N]; |
| for (int i = 0; i < N; ++i) { |
| s[i] = new DebugSampler; |
| s[i]->schedule(); |
| } |
| usleep(1010000); |
| for (int i = 0; i < N; ++i) { |
| EXPECT_LE(1, s[i]->called_count()) << "i=" << i; |
| } |
| for (int i = 0; i < N; ++i) { |
| s[i]->destroy(); |
| } |
| return NULL; |
| } |
| |
| TEST(SamplerTest, multi_threaded) { |
| #if !BRPC_WITH_GLOG |
| logging::StringSink log_str; |
| logging::LogSink* old_sink = logging::SetLogSink(&log_str); |
| #endif |
| pthread_t th[10]; |
| DebugSampler::_s_ndestroy = 0; |
| for (size_t i = 0; i < arraysize(th); ++i) { |
| ASSERT_EQ(0, pthread_create(&th[i], NULL, check, NULL)); |
| } |
| for (size_t i = 0; i < arraysize(th); ++i) { |
| ASSERT_EQ(0, pthread_join(th[i], NULL)); |
| } |
| sleep(1); |
| EXPECT_EQ(100 * arraysize(th), (size_t)DebugSampler::_s_ndestroy); |
| #if !BRPC_WITH_GLOG |
| ASSERT_EQ(&log_str, logging::SetLogSink(old_sink)); |
| if (log_str.find("Removed ") != std::string::npos) { |
| ASSERT_NE(std::string::npos, log_str.find("Removed 0, sampled 1000")); |
| ASSERT_NE(std::string::npos, log_str.find("Removed 1000, sampled 0")); |
| } |
| #endif |
| } |
| } // namespace |