src/mem/ruby/network/garnet/BaseGarnetNetwork.cc

   1 /*
   2  * Copyright (c) 2008 Princeton University
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met: redistributions of source code must retain the above copyright
   8  * notice, this list of conditions and the following disclaimer;
   9  * redistributions in binary form must reproduce the above copyright
  10  * notice, this list of conditions and the following disclaimer in the
  11  * documentation and/or other materials provided with the distribution;
  12  * neither the name of the copyright holders nor the names of its
  13  * contributors may be used to endorse or promote products derived from
  14  * this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  18  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  19  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  20  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * Authors: Niket Agarwal
  29  */
  30
  31 #include "mem/ruby/buffers/MessageBuffer.hh"
  32 #include "mem/ruby/network/BasicLink.hh"
  33 #include "mem/ruby/network/Topology.hh"
  34 #include "mem/ruby/network/garnet/BaseGarnetNetwork.hh"
  35
  36 BaseGarnetNetwork::BaseGarnetNetwork(const Params *p)
  37     : Network(p)
  38 {
  39     m_ni_flit_size = p->ni_flit_size;
  40     m_vcs_per_vnet = p->vcs_per_vnet;
  41     m_enable_fault_model = p->enable_fault_model;
  42     if (m_enable_fault_model)
  43         fault_model = p->fault_model;
  44
  45     m_ruby_start = 0;
  46     m_flits_received = 0;
  47     m_flits_injected = 0;
  48     m_network_latency = 0.0;
  49     m_queueing_latency = 0.0;
  50
  51     // Currently Garnet only supports uniform bandwidth for all
  52     // links and network interfaces.
  53     for (std::vector<BasicExtLink*>::const_iterator i =
  54              m_topology_ptr->params()->ext_links.begin();
  55          i != m_topology_ptr->params()->ext_links.end(); ++i) {
  56         BasicExtLink* ext_link = (*i);
  57         if (ext_link->params()->bandwidth_factor != m_ni_flit_size) {
  58             fatal("Garnet only supports uniform bw across all links and NIs\n");
  59         }
  60     }
  61     for (std::vector<BasicIntLink*>::const_iterator i =
  62              m_topology_ptr->params()->int_links.begin();
  63          i != m_topology_ptr->params()->int_links.end(); ++i) {
  64         BasicIntLink* int_link = (*i);
  65         if (int_link->params()->bandwidth_factor != m_ni_flit_size) {
  66             fatal("Garnet only supports uniform bw across all links and NIs\n");
  67         }
  68     }
  69
  70     // Allocate to and from queues
  71
  72     // Queues that are getting messages from protocol
  73     m_toNetQueues.resize(m_nodes);
  74
  75     // Queues that are feeding the protocol
  76     m_fromNetQueues.resize(m_nodes);
  77
  78     m_in_use.resize(m_virtual_networks);
  79     m_ordered.resize(m_virtual_networks);
  80     for (int i = 0; i < m_virtual_networks; i++) {
  81         m_in_use[i] = false;
  82         m_ordered[i] = false;
  83     }
  84
  85     for (int node = 0; node < m_nodes; node++) {
  86         // Setting number of virtual message buffers per Network Queue
  87         m_toNetQueues[node].resize(m_virtual_networks);
  88         m_fromNetQueues[node].resize(m_virtual_networks);
  89
  90         // Instantiating the Message Buffers that
  91         // interact with the coherence protocol
  92         for (int j = 0; j < m_virtual_networks; j++) {
  93             m_toNetQueues[node][j] = new MessageBuffer();
  94             m_fromNetQueues[node][j] = new MessageBuffer();
  95         }
  96     }
  97 }
  98
  99 void
 100 BaseGarnetNetwork::init()
 101 {
 102     Network::init();
 103 }