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test_federated_communicator.cc
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test_federated_communicator.cc
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/*!
* Copyright 2022 XGBoost contributors
*/
#include <dmlc/parameter.h>
#include <grpcpp/server_builder.h>
#include <gtest/gtest.h>
#include <thread>
#include "../../../plugin/federated/federated_communicator.h"
#include "../../../plugin/federated/federated_server.h"
namespace xgboost {
namespace collective {
std::string const kServerAddress{"localhost:56789"}; // NOLINT(cert-err58-cpp)
class FederatedCommunicatorTest : public ::testing::Test {
public:
static void VerifyAllreduce(int rank) {
FederatedCommunicator comm{kWorldSize, rank, kServerAddress};
CheckAllreduce(comm);
}
static void VerifyBroadcast(int rank) {
FederatedCommunicator comm{kWorldSize, rank, kServerAddress};
CheckBroadcast(comm, rank);
}
protected:
void SetUp() override {
server_thread_.reset(new std::thread([this] {
grpc::ServerBuilder builder;
federated::FederatedService service{kWorldSize};
builder.AddListeningPort(kServerAddress, grpc::InsecureServerCredentials());
builder.RegisterService(&service);
server_ = builder.BuildAndStart();
server_->Wait();
}));
}
void TearDown() override {
while (!server_) {
sleep(1);
}
server_->Shutdown();
server_thread_->join();
}
static void CheckAllreduce(FederatedCommunicator &comm) {
int buffer[] = {1, 2, 3, 4, 5};
comm.AllReduce(buffer, sizeof(buffer) / sizeof(buffer[0]), DataType::kInt32, Operation::kSum);
int expected[] = {3, 6, 9, 12, 15};
for (auto i = 0; i < 5; i++) {
EXPECT_EQ(buffer[i], expected[i]);
}
}
static void CheckBroadcast(FederatedCommunicator &comm, int rank) {
if (rank == 0) {
std::string buffer{"hello"};
comm.Broadcast(&buffer[0], buffer.size(), 0);
EXPECT_EQ(buffer, "hello");
} else {
std::string buffer{" "};
comm.Broadcast(&buffer[0], buffer.size(), 0);
EXPECT_EQ(buffer, "hello");
}
}
static int const kWorldSize{3};
std::unique_ptr<std::thread> server_thread_;
std::unique_ptr<grpc::Server> server_;
};
TEST(FederatedCommunicatorSimpleTest, ThrowOnWorldSizeTooSmall) {
auto construct = []() { FederatedCommunicator comm{0, 0, kServerAddress, "", "", ""}; };
EXPECT_THROW(construct(), dmlc::Error);
}
TEST(FederatedCommunicatorSimpleTest, ThrowOnRankTooSmall) {
auto construct = []() { FederatedCommunicator comm{1, -1, kServerAddress, "", "", ""}; };
EXPECT_THROW(construct(), dmlc::Error);
}
TEST(FederatedCommunicatorSimpleTest, ThrowOnRankTooBig) {
auto construct = []() { FederatedCommunicator comm{1, 1, kServerAddress, "", "", ""}; };
EXPECT_THROW(construct(), dmlc::Error);
}
TEST(FederatedCommunicatorSimpleTest, ThrowOnWorldSizeNotInteger) {
auto construct = []() {
Json config{JsonObject()};
config["federated_server_address"] = kServerAddress;
config["federated_world_size"] = std::string("1");
config["federated_rank"] = Integer(0);
auto *comm = FederatedCommunicator::Create(config);
};
EXPECT_THROW(construct(), dmlc::Error);
}
TEST(FederatedCommunicatorSimpleTest, ThrowOnRankNotInteger) {
auto construct = []() {
Json config{JsonObject()};
config["federated_server_address"] = kServerAddress;
config["federated_world_size"] = 1;
config["federated_rank"] = std::string("0");
auto *comm = FederatedCommunicator::Create(config);
};
EXPECT_THROW(construct(), dmlc::Error);
}
TEST(FederatedCommunicatorSimpleTest, GetWorldSizeAndRank) {
FederatedCommunicator comm{6, 3, kServerAddress};
EXPECT_EQ(comm.GetWorldSize(), 6);
EXPECT_EQ(comm.GetRank(), 3);
}
TEST(FederatedCommunicatorSimpleTest, IsDistributed) {
FederatedCommunicator comm{2, 1, kServerAddress};
EXPECT_TRUE(comm.IsDistributed());
}
TEST_F(FederatedCommunicatorTest, Create) {
Json config{JsonObject()};
config["federated_server_address"] = kServerAddress;
config["federated_world_size"] = 1;
config["federated_rank"] = Integer(0);
auto *comm = FederatedCommunicator::Create(config);
EXPECT_EQ(1, comm->GetWorldSize());
EXPECT_EQ(0, comm->GetRank());
delete comm;
}
TEST_F(FederatedCommunicatorTest, Allreduce) {
std::vector<std::thread> threads;
for (auto rank = 0; rank < kWorldSize; rank++) {
threads.emplace_back(std::thread(&FederatedCommunicatorTest::VerifyAllreduce, rank));
}
for (auto &thread : threads) {
thread.join();
}
}
TEST_F(FederatedCommunicatorTest, Broadcast) {
std::vector<std::thread> threads;
for (auto rank = 0; rank < kWorldSize; rank++) {
threads.emplace_back(std::thread(&FederatedCommunicatorTest::VerifyBroadcast, rank));
}
for (auto &thread : threads) {
thread.join();
}
}
} // namespace collective
} // namespace xgboost