mscclpp/src/include/connection.hpp at a56518ccfe2fa590ff0d91fc63d92aa489b1e4e4 · microsoft/mscclpp · GitHub

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// Copyright (c) Microsoft Corporation.
// Licensed under the MIT license.

#ifndef MSCCLPP_CONNECTION_HPP_
#define MSCCLPP_CONNECTION_HPP_

#include <mscclpp/core.hpp>
#include <mscclpp/gpu_utils.hpp>

#include "communicator.hpp"
#include "context.hpp"
#include "ib.hpp"
#include "registered_memory.hpp"
#include "socket.h"

namespace mscclpp {

class ConnectionFactory {
 private:
  using ConnectionCreator = std::function<std::shared_ptr<Connection>(std::shared_ptr<Context>, Endpoint, Endpoint)>;
  static std::unordered_map<std::string, ConnectionCreator>& getRegistry() {
    static std::unordered_map<std::string, ConnectionCreator> registry;
    return registry;
  }

 public:
  static void registerConnection(const std::string& connName, ConnectionCreator creator) {
    getRegistry()[connName] = creator;
  }

  static std::shared_ptr<Connection> createConnection(const std::string& connName, std::shared_ptr<Context> context,
                                                      Endpoint localEndpoint, Endpoint remoteEndpoint) {
    auto& registry = getRegistry();
    auto it = registry.find(connName);
    if (it != registry.end()) {
      return it->second(context, localEndpoint, remoteEndpoint);
    }
    throw std::runtime_error("Unknown connection type: " + connName);
  }
};

class CudaIpcConnection : public Connection {
 private:
  std::shared_ptr<CudaIpcStream> stream_;

 public:
  CudaIpcConnection(std::shared_ptr<Context> context, Endpoint localEndpoint, Endpoint remoteEndpoint,
                    std::shared_ptr<CudaIpcStream> stream);

  Transport transport() const override;

  Transport remoteTransport() const override;

  void write(RegisteredMemory dst, uint64_t dstOffset, RegisteredMemory src, uint64_t srcOffset,
             uint64_t size) override;
  void updateAndSync(RegisteredMemory dst, uint64_t dstOffset, uint64_t* src, uint64_t newValue) override;

  void flush(int64_t timeoutUsec) override;
};

class IBConnection : public Connection {
 private:
  Transport transport_;
  Transport remoteTransport_;
  IbQp* qp_;
  std::unique_ptr<uint64_t> dummyAtomicSource_;  // not used anywhere but IB needs a source
  RegisteredMemory dummyAtomicSourceMem_;
  mscclpp::TransportInfo dstTransportInfo_;

 public:
  IBConnection(std::shared_ptr<Context> context, Endpoint localEndpoint, Endpoint remoteEndpoint);

  Transport transport() const override;

  Transport remoteTransport() const override;

  void write(RegisteredMemory dst, uint64_t dstOffset, RegisteredMemory src, uint64_t srcOffset,
             uint64_t size) override;
  void updateAndSync(RegisteredMemory dst, uint64_t dstOffset, uint64_t* src, uint64_t newValue) override;

  void flush(int64_t timeoutUsec) override;
};

class EthernetConnection : public Connection {
 private:
  std::unique_ptr<Socket> sendSocket_;
  std::unique_ptr<Socket> recvSocket_;
  std::thread threadRecvMessages_;
  volatile uint32_t* abortFlag_;
  const uint64_t sendBufferSize_;
  const uint64_t recvBufferSize_;
  std::vector<char> sendBuffer_;
  std::vector<char> recvBuffer_;

  void recvMessages();
  void sendMessage();

 public:
  EthernetConnection(std::shared_ptr<Context> context, Endpoint localEndpoint, Endpoint remoteEndpoint,
                     uint64_t sendBufferSize = 256 * 1024 * 1024, uint64_t recvBufferSize = 256 * 1024 * 1024);

  ~EthernetConnection();

  Transport transport() const override;

  Transport remoteTransport() const override;

  void write(RegisteredMemory dst, uint64_t dstOffset, RegisteredMemory src, uint64_t srcOffset,
             uint64_t size) override;
  void updateAndSync(RegisteredMemory dst, uint64_t dstOffset, uint64_t* src, uint64_t newValue) override;

  void flush(int64_t timeoutUsec) override;
};

}  // namespace mscclpp

#endif  // MSCCLPP_CONNECTION_HPP_