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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
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338 lines
12 KiB
338 lines
12 KiB
/* |
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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 <atomic> |
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#include <memory> |
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#include <mutex> |
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#include <random> |
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#include <sstream> |
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#include <thread> |
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#include <grpc/grpc.h> |
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#include <grpc/support/alloc.h> |
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#include <grpc/support/log.h> |
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#include <grpc/support/string_util.h> |
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#include <grpc/support/time.h> |
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#include <grpcpp/channel.h> |
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#include <grpcpp/client_context.h> |
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#include <grpcpp/create_channel.h> |
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#include <grpcpp/impl/codegen/sync.h> |
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#include <grpcpp/server.h> |
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#include <grpcpp/server_builder.h> |
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#include "src/core/ext/filters/client_channel/parse_address.h" |
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#include "src/core/ext/filters/client_channel/resolver/fake/fake_resolver.h" |
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#include "src/core/ext/filters/client_channel/server_address.h" |
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#include "src/core/lib/gprpp/ref_counted_ptr.h" |
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#include "src/core/lib/gprpp/thd.h" |
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#include "src/core/lib/iomgr/sockaddr.h" |
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#include "test/core/util/port.h" |
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#include "test/core/util/test_config.h" |
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#include "test/cpp/end2end/test_service_impl.h" |
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#include "src/proto/grpc/lb/v1/load_balancer.grpc.pb.h" |
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#include "src/proto/grpc/testing/echo.grpc.pb.h" |
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using grpc::lb::v1::LoadBalanceRequest; |
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using grpc::lb::v1::LoadBalanceResponse; |
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using grpc::lb::v1::LoadBalancer; |
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namespace grpc { |
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namespace testing { |
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namespace { |
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const size_t kNumBackends = 10; |
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const size_t kNumBalancers = 5; |
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const size_t kNumClientThreads = 100; |
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const int kResolutionUpdateIntervalMs = 50; |
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const int kServerlistUpdateIntervalMs = 10; |
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const int kTestDurationSec = 30; |
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using BackendServiceImpl = TestServiceImpl; |
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class BalancerServiceImpl : public LoadBalancer::Service { |
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public: |
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using Stream = ServerReaderWriter<LoadBalanceResponse, LoadBalanceRequest>; |
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explicit BalancerServiceImpl(const std::vector<int>& all_backend_ports) |
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: all_backend_ports_(all_backend_ports) {} |
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Status BalanceLoad(ServerContext* /*context*/, Stream* stream) override { |
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gpr_log(GPR_INFO, "LB[%p]: Start BalanceLoad.", this); |
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LoadBalanceRequest request; |
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stream->Read(&request); |
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while (!shutdown_) { |
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stream->Write(BuildRandomResponseForBackends()); |
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std::this_thread::sleep_for( |
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std::chrono::milliseconds(kServerlistUpdateIntervalMs)); |
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} |
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gpr_log(GPR_INFO, "LB[%p]: Finish BalanceLoad.", this); |
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return Status::OK; |
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} |
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void Shutdown() { shutdown_ = true; } |
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private: |
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grpc::string Ip4ToPackedString(const char* ip_str) { |
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struct in_addr ip4; |
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GPR_ASSERT(inet_pton(AF_INET, ip_str, &ip4) == 1); |
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return grpc::string(reinterpret_cast<const char*>(&ip4), sizeof(ip4)); |
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} |
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LoadBalanceResponse BuildRandomResponseForBackends() { |
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// Generate a random serverlist with varying size (if N = |
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// all_backend_ports_.size(), num_non_drop_entry is in [0, 2N], |
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// num_drop_entry is in [0, N]), order, duplicate, and drop rate. |
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size_t num_non_drop_entry = |
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std::rand() % (all_backend_ports_.size() * 2 + 1); |
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size_t num_drop_entry = std::rand() % (all_backend_ports_.size() + 1); |
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std::vector<int> random_backend_indices; |
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for (size_t i = 0; i < num_non_drop_entry; ++i) { |
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random_backend_indices.push_back(std::rand() % all_backend_ports_.size()); |
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} |
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for (size_t i = 0; i < num_drop_entry; ++i) { |
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random_backend_indices.push_back(-1); |
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} |
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std::shuffle(random_backend_indices.begin(), random_backend_indices.end(), |
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std::mt19937(std::random_device()())); |
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// Build the response according to the random list generated above. |
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LoadBalanceResponse response; |
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for (int index : random_backend_indices) { |
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auto* server = response.mutable_server_list()->add_servers(); |
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if (index < 0) { |
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server->set_drop(true); |
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server->set_load_balance_token("load_balancing"); |
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} else { |
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server->set_ip_address(Ip4ToPackedString("127.0.0.1")); |
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server->set_port(all_backend_ports_[index]); |
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} |
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} |
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return response; |
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} |
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std::atomic_bool shutdown_{false}; |
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const std::vector<int> all_backend_ports_; |
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}; |
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class ClientChannelStressTest { |
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public: |
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void Run() { |
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Start(); |
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// Keep updating resolution for the test duration. |
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gpr_log(GPR_INFO, "Start updating resolution."); |
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const auto wait_duration = |
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std::chrono::milliseconds(kResolutionUpdateIntervalMs); |
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std::vector<AddressData> addresses; |
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auto start_time = std::chrono::steady_clock::now(); |
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while (true) { |
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if (std::chrono::duration_cast<std::chrono::seconds>( |
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std::chrono::steady_clock::now() - start_time) |
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.count() > kTestDurationSec) { |
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break; |
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} |
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// Generate a random subset of balancers. |
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addresses.clear(); |
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for (const auto& balancer_server : balancer_servers_) { |
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// Select each address with probability of 0.8. |
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if (std::rand() % 10 < 8) { |
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addresses.emplace_back(AddressData{balancer_server.port_, true, ""}); |
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} |
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} |
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std::shuffle(addresses.begin(), addresses.end(), |
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std::mt19937(std::random_device()())); |
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SetNextResolution(addresses); |
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std::this_thread::sleep_for(wait_duration); |
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} |
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gpr_log(GPR_INFO, "Finish updating resolution."); |
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Shutdown(); |
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} |
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private: |
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template <typename T> |
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struct ServerThread { |
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explicit ServerThread(const grpc::string& type, |
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const grpc::string& server_host, T* service) |
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: type_(type), service_(service) { |
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grpc::internal::Mutex mu; |
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// We need to acquire the lock here in order to prevent the notify_one |
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// by ServerThread::Start from firing before the wait below is hit. |
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grpc::internal::MutexLock lock(&mu); |
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port_ = grpc_pick_unused_port_or_die(); |
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gpr_log(GPR_INFO, "starting %s server on port %d", type_.c_str(), port_); |
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grpc::internal::CondVar cond; |
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thread_.reset(new std::thread( |
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std::bind(&ServerThread::Start, this, server_host, &mu, &cond))); |
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cond.Wait(&mu); |
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gpr_log(GPR_INFO, "%s server startup complete", type_.c_str()); |
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} |
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void Start(const grpc::string& server_host, grpc::internal::Mutex* mu, |
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grpc::internal::CondVar* cond) { |
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// We need to acquire the lock here in order to prevent the notify_one |
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// below from firing before its corresponding wait is executed. |
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grpc::internal::MutexLock lock(mu); |
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std::ostringstream server_address; |
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server_address << server_host << ":" << port_; |
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ServerBuilder builder; |
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builder.AddListeningPort(server_address.str(), |
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InsecureServerCredentials()); |
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builder.RegisterService(service_); |
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server_ = builder.BuildAndStart(); |
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cond->Signal(); |
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} |
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void Shutdown() { |
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gpr_log(GPR_INFO, "%s about to shutdown", type_.c_str()); |
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server_->Shutdown(grpc_timeout_milliseconds_to_deadline(0)); |
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thread_->join(); |
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gpr_log(GPR_INFO, "%s shutdown completed", type_.c_str()); |
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} |
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int port_; |
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grpc::string type_; |
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std::unique_ptr<Server> server_; |
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T* service_; |
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std::unique_ptr<std::thread> thread_; |
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}; |
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struct AddressData { |
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int port; |
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bool is_balancer; |
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grpc::string balancer_name; |
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}; |
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void SetNextResolution(const std::vector<AddressData>& address_data) { |
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grpc_core::ExecCtx exec_ctx; |
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grpc_core::Resolver::Result result; |
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for (const auto& addr : address_data) { |
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char* lb_uri_str; |
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gpr_asprintf(&lb_uri_str, "ipv4:127.0.0.1:%d", addr.port); |
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grpc_uri* lb_uri = grpc_uri_parse(lb_uri_str, true); |
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GPR_ASSERT(lb_uri != nullptr); |
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grpc_resolved_address address; |
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GPR_ASSERT(grpc_parse_uri(lb_uri, &address)); |
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std::vector<grpc_arg> args_to_add; |
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if (addr.is_balancer) { |
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args_to_add.emplace_back(grpc_channel_arg_integer_create( |
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const_cast<char*>(GRPC_ARG_ADDRESS_IS_BALANCER), 1)); |
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args_to_add.emplace_back(grpc_channel_arg_string_create( |
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const_cast<char*>(GRPC_ARG_ADDRESS_BALANCER_NAME), |
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const_cast<char*>(addr.balancer_name.c_str()))); |
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} |
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grpc_channel_args* args = grpc_channel_args_copy_and_add( |
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nullptr, args_to_add.data(), args_to_add.size()); |
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result.addresses.emplace_back(address.addr, address.len, args); |
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grpc_uri_destroy(lb_uri); |
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gpr_free(lb_uri_str); |
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} |
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response_generator_->SetResponse(std::move(result)); |
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} |
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void KeepSendingRequests() { |
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gpr_log(GPR_INFO, "Start sending requests."); |
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while (!shutdown_) { |
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ClientContext context; |
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context.set_deadline(grpc_timeout_milliseconds_to_deadline(1000)); |
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EchoRequest request; |
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request.set_message("test"); |
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EchoResponse response; |
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{ |
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std::lock_guard<std::mutex> lock(stub_mutex_); |
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Status status = stub_->Echo(&context, request, &response); |
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} |
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} |
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gpr_log(GPR_INFO, "Finish sending requests."); |
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} |
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void CreateStub() { |
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ChannelArguments args; |
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response_generator_ = |
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grpc_core::MakeRefCounted<grpc_core::FakeResolverResponseGenerator>(); |
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args.SetPointer(GRPC_ARG_FAKE_RESOLVER_RESPONSE_GENERATOR, |
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response_generator_.get()); |
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std::ostringstream uri; |
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uri << "fake:///servername_not_used"; |
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channel_ = ::grpc::CreateCustomChannel(uri.str(), |
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InsecureChannelCredentials(), args); |
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stub_ = grpc::testing::EchoTestService::NewStub(channel_); |
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} |
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void Start() { |
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// Start the backends. |
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std::vector<int> backend_ports; |
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for (size_t i = 0; i < kNumBackends; ++i) { |
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backends_.emplace_back(new BackendServiceImpl()); |
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backend_servers_.emplace_back(ServerThread<BackendServiceImpl>( |
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"backend", server_host_, backends_.back().get())); |
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backend_ports.push_back(backend_servers_.back().port_); |
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} |
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// Start the load balancers. |
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for (size_t i = 0; i < kNumBalancers; ++i) { |
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balancers_.emplace_back(new BalancerServiceImpl(backend_ports)); |
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balancer_servers_.emplace_back(ServerThread<BalancerServiceImpl>( |
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"balancer", server_host_, balancers_.back().get())); |
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} |
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// Start sending RPCs in multiple threads. |
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CreateStub(); |
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for (size_t i = 0; i < kNumClientThreads; ++i) { |
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client_threads_.emplace_back( |
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std::thread(&ClientChannelStressTest::KeepSendingRequests, this)); |
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} |
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} |
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void Shutdown() { |
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shutdown_ = true; |
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for (size_t i = 0; i < client_threads_.size(); ++i) { |
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client_threads_[i].join(); |
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} |
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for (size_t i = 0; i < balancers_.size(); ++i) { |
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balancers_[i]->Shutdown(); |
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balancer_servers_[i].Shutdown(); |
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} |
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for (size_t i = 0; i < backends_.size(); ++i) { |
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backend_servers_[i].Shutdown(); |
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} |
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} |
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std::atomic_bool shutdown_{false}; |
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const grpc::string server_host_ = "localhost"; |
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std::shared_ptr<Channel> channel_; |
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std::unique_ptr<grpc::testing::EchoTestService::Stub> stub_; |
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std::mutex stub_mutex_; |
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std::vector<std::unique_ptr<BackendServiceImpl>> backends_; |
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std::vector<std::unique_ptr<BalancerServiceImpl>> balancers_; |
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std::vector<ServerThread<BackendServiceImpl>> backend_servers_; |
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std::vector<ServerThread<BalancerServiceImpl>> balancer_servers_; |
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grpc_core::RefCountedPtr<grpc_core::FakeResolverResponseGenerator> |
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response_generator_; |
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std::vector<std::thread> client_threads_; |
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}; |
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} // namespace |
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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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grpc_init(); |
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grpc::testing::TestEnvironment env(argc, argv); |
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grpc::testing::ClientChannelStressTest test; |
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test.Run(); |
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grpc_shutdown(); |
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return 0; |
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}
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