SwitchAllocator.hh

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/*
 * Copyright (c) 2020 Inria
 * Copyright (c) 2016 Georgia Institute of Technology
 * Copyright (c) 2008 Princeton University
 * All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * redistributions in binary form must reproduce the above copyright
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 * this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#ifndef __MEM_RUBY_NETWORK_GARNET_0_SWITCHALLOCATOR_HH__
#define __MEM_RUBY_NETWORK_GARNET_0_SWITCHALLOCATOR_HH__
 
#include <iostream>
#include <vector>
 
#include "mem/ruby/common/Consumer.hh"
#include "mem/ruby/network/garnet/CommonTypes.hh"
 
class Router;
class InputUnit;
class OutputUnit;
 
class SwitchAllocator : public Consumer
{
  public:
    SwitchAllocator(Router *router);
    void wakeup();
    void init();
    void clear_request_vector();
    void check_for_wakeup();
    int get_vnet (int invc);
    void print(std::ostream& out) const {};
    void arbitrate_inports();
    void arbitrate_outports();
    bool send_allowed(int inport, int invc, int outport, int outvc);
    int vc_allocate(int outport, int inport, int invc);
 
    inline double
    get_input_arbiter_activity()
    {
        return m_input_arbiter_activity;
    }
    inline double
    get_output_arbiter_activity()
    {
        return m_output_arbiter_activity;
    }
 
    void resetStats();
 
  private:
    int m_num_inports, m_num_outports;
    int m_num_vcs, m_vc_per_vnet;
 
    double m_input_arbiter_activity, m_output_arbiter_activity;
 
    Router *m_router;
    std::vector<int> m_round_robin_invc;
    std::vector<int> m_round_robin_inport;
    std::vector<std::vector<bool>> m_port_requests;
    std::vector<std::vector<int>> m_vc_winners; // a list for each outport
};
 
#endif // __MEM_RUBY_NETWORK_GARNET_0_SWITCHALLOCATOR_HH__