SimpleMPIScheduler.h

// Copyright 2024, UChicago Argonne, LLC
// All Rights Reserved
// Software Name: NEML2 -- the New Engineering material Model Library, version 2
// By: Argonne National Laboratory
// OPEN SOURCE LICENSE (MIT)
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#pragma once
 
#include "neml2/dispatchers/WorkScheduler.h"
#include "neml2/base/Registry.h"
#include "neml2/base/NEML2Object.h"
#include "neml2/base/Factory.h"
 
#include "timpi/communicator.h"
 
namespace neml2
{
class SimpleMPIScheduler : public WorkScheduler
{
public:
  static OptionSet expected_options();

  SimpleMPIScheduler(const OptionSet & options);

  void setup() override;
 
  std::vector<Device> devices() const override { return {_available_devices[_device_index]}; }
 
  virtual TIMPI::Communicator & comm() { return _comm; }
 
  virtual void set_comm(TIMPI::Communicator comm) { _comm.duplicate(comm); }
 
protected:
  bool schedule_work_impl(Device &, std::size_t &) const override;
  void dispatched_work_impl(Device, std::size_t) override;
  void completed_work_impl(Device, std::size_t) override;
  bool all_work_completed() const override;
 
private:
  void determine_my_device();

  std::vector<Device> _available_devices;

  std::vector<std::size_t> _batch_sizes;

  std::vector<std::size_t> _capacities;

  TIMPI::Communicator _comm;

  std::size_t _device_index = 0;

  std::size_t _load = 0;
};
class SimpleMPIScheduler : public WorkScheduler {…};
 
} // namespace neml2