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/garnet/BaseGarnetNetwork.hh"
  33
  34 using namespace std;
  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     // Currently Garnet only supports uniform bandwidth for all
  46     // links and network interfaces.
  47     for (std::vector<BasicExtLink*>::const_iterator i = p->ext_links.begin();
  48          i != p->ext_links.end(); ++i) {
  49         BasicExtLink* ext_link = (*i);
  50         if (ext_link->params()->bandwidth_factor != m_ni_flit_size) {
  51             fatal("Garnet only supports uniform bw across all links and NIs\n");
  52         }
  53     }
  54     for (std::vector<BasicIntLink*>::const_iterator i =  p->int_links.begin();
  55          i != p->int_links.end(); ++i) {
  56         BasicIntLink* int_link = (*i);
  57         if (int_link->params()->bandwidth_factor != m_ni_flit_size) {
  58             fatal("Garnet only supports uniform bw across all links and NIs\n");
  59         }
  60     }
  61
  62     // Allocate to and from queues
  63
  64     // Queues that are getting messages from protocol
  65     m_toNetQueues.resize(m_nodes);
  66
  67     // Queues that are feeding the protocol
  68     m_fromNetQueues.resize(m_nodes);
  69
  70     m_in_use.resize(m_virtual_networks);
  71     m_ordered.resize(m_virtual_networks);
  72     for (int i = 0; i < m_virtual_networks; i++) {
  73         m_in_use[i] = false;
  74         m_ordered[i] = false;
  75     }
  76
  77     for (int node = 0; node < m_nodes; node++) {
  78         // Setting number of virtual message buffers per Network Queue
  79         m_toNetQueues[node].resize(m_virtual_networks);
  80         m_fromNetQueues[node].resize(m_virtual_networks);
  81
  82         // Instantiating the Message Buffers that
  83         // interact with the coherence protocol
  84         for (int j = 0; j < m_virtual_networks; j++) {
  85             m_toNetQueues[node][j] = new MessageBuffer();
  86             m_fromNetQueues[node][j] = new MessageBuffer();
  87         }
  88     }
  89 }
  90
  91 void
  92 BaseGarnetNetwork::init()
  93 {
  94     Network::init();
  95 }
  96
  97 MessageBuffer*
  98 BaseGarnetNetwork::getToNetQueue(NodeID id, bool ordered, int network_num,
  99                                  string vnet_type)
 100 {
 101     checkNetworkAllocation(id, ordered, network_num, vnet_type);
 102     return m_toNetQueues[id][network_num];
 103 }
 104
 105 MessageBuffer*
 106 BaseGarnetNetwork::getFromNetQueue(NodeID id, bool ordered, int network_num,
 107                                    string vnet_type)
 108 {
 109     checkNetworkAllocation(id, ordered, network_num, vnet_type);
 110     return m_fromNetQueues[id][network_num];
 111 }
 112
 113 void
 114 BaseGarnetNetwork::regStats()
 115 {
 116     m_flits_received
 117         .init(m_virtual_networks)
 118         .name(name() + ".flits_received")
 119         .flags(Stats::pdf | Stats::total | Stats::nozero | Stats::oneline)
 120         ;
 121
 122     m_flits_injected
 123         .init(m_virtual_networks)
 124         .name(name() + ".flits_injected")
 125         .flags(Stats::pdf | Stats::total | Stats::nozero | Stats::oneline)
 126         ;
 127
 128     m_network_latency
 129         .init(m_virtual_networks)
 130         .name(name() + ".network_latency")
 131         .flags(Stats::oneline)
 132         ;
 133
 134     m_queueing_latency
 135         .init(m_virtual_networks)
 136         .name(name() + ".queueing_latency")
 137         .flags(Stats::oneline)
 138         ;
 139
 140     for (int i = 0; i < m_virtual_networks; i++) {
 141         m_flits_received.subname(i, csprintf("vnet-%i", i));
 142         m_flits_injected.subname(i, csprintf("vnet-%i", i));
 143         m_network_latency.subname(i, csprintf("vnet-%i", i));
 144         m_queueing_latency.subname(i, csprintf("vnet-%i", i));
 145     }
 146
 147     m_avg_vnet_latency
 148         .name(name() + ".average_vnet_latency")
 149         .flags(Stats::oneline);
 150     m_avg_vnet_latency = m_network_latency / m_flits_received;
 151
 152     m_avg_vqueue_latency
 153         .name(name() + ".average_vqueue_latency")
 154         .flags(Stats::oneline);
 155     m_avg_vqueue_latency = m_queueing_latency / m_flits_received;
 156
 157     m_avg_network_latency.name(name() + ".average_network_latency");
 158     m_avg_network_latency = sum(m_network_latency) / sum(m_flits_received);
 159
 160     m_avg_queueing_latency.name(name() + ".average_queueing_latency");
 161     m_avg_queueing_latency = sum(m_queueing_latency) / sum(m_flits_received);
 162
 163     m_avg_latency.name(name() + ".average_latency");
 164     m_avg_latency = m_avg_network_latency + m_avg_queueing_latency;
 165 }