src/mem/ruby/network/garnet/SwitchAllocator.hh

   1 /*
   2  * Copyright (c) 2020 Inria
   3  * Copyright (c) 2016 Georgia Institute of Technology
   4  * Copyright (c) 2008 Princeton University
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions are
   9  * met: redistributions of source code must retain the above copyright
  10  * notice, this list of conditions and the following disclaimer;
  11  * redistributions in binary form must reproduce the above copyright
  12  * notice, this list of conditions and the following disclaimer in the
  13  * documentation and/or other materials provided with the distribution;
  14  * neither the name of the copyright holders nor the names of its
  15  * contributors may be used to endorse or promote products derived from
  16  * this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31
  32 #ifndef __MEM_RUBY_NETWORK_GARNET_0_SWITCHALLOCATOR_HH__
  33 #define __MEM_RUBY_NETWORK_GARNET_0_SWITCHALLOCATOR_HH__
  34
  35 #include <iostream>
  36 #include <vector>
  37
  38 #include "mem/ruby/common/Consumer.hh"
  39 #include "mem/ruby/network/garnet/CommonTypes.hh"
  40
  41 class Router;
  42 class InputUnit;
  43 class OutputUnit;
  44
  45 class SwitchAllocator : public Consumer
  46 {
  47   public:
  48     SwitchAllocator(Router *router);
  49     void wakeup();
  50     void init();
  51     void clear_request_vector();
  52     void check_for_wakeup();
  53     int get_vnet (int invc);
  54     void print(std::ostream& out) const {};
  55     void arbitrate_inports();
  56     void arbitrate_outports();
  57     bool send_allowed(int inport, int invc, int outport, int outvc);
  58     int vc_allocate(int outport, int inport, int invc);
  59
  60     inline double
  61     get_input_arbiter_activity()
  62     {
  63         return m_input_arbiter_activity;
  64     }
  65     inline double
  66     get_output_arbiter_activity()
  67     {
  68         return m_output_arbiter_activity;
  69     }
  70
  71     void resetStats();
  72
  73   private:
  74     int m_num_inports, m_num_outports;
  75     int m_num_vcs, m_vc_per_vnet;
  76
  77     double m_input_arbiter_activity, m_output_arbiter_activity;
  78
  79     Router *m_router;
  80     std::vector<int> m_round_robin_invc;
  81     std::vector<int> m_round_robin_inport;
  82     std::vector<std::vector<bool>> m_port_requests;
  83     std::vector<std::vector<int>> m_vc_winners; // a list for each outport
  84 };
  85
  86 #endif // __MEM_RUBY_NETWORK_GARNET_0_SWITCHALLOCATOR_HH__