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 using namespace std;
  37
  38 BaseGarnetNetwork::BaseGarnetNetwork(const Params *p)
  39     : Network(p)
  40 {
  41     m_ni_flit_size = p->ni_flit_size;
  42     m_vcs_per_vnet = p->vcs_per_vnet;
  43     m_enable_fault_model = p->enable_fault_model;
  44     if (m_enable_fault_model)
  45         fault_model = p->fault_model;
  46
  47     // Currently Garnet only supports uniform bandwidth for all
  48     // links and network interfaces.
  49     for (std::vector<BasicExtLink*>::const_iterator i = p->ext_links.begin();
  50          i != p->ext_links.end(); ++i) {
  51         BasicExtLink* ext_link = (*i);
  52         if (ext_link->params()->bandwidth_factor != m_ni_flit_size) {
  53             fatal("Garnet only supports uniform bw across all links and NIs\n");
  54         }
  55     }
  56     for (std::vector<BasicIntLink*>::const_iterator i =  p->int_links.begin();
  57          i != p->int_links.end(); ++i) {
  58         BasicIntLink* int_link = (*i);
  59         if (int_link->params()->bandwidth_factor != m_ni_flit_size) {
  60             fatal("Garnet only supports uniform bw across all links and NIs\n");
  61         }
  62     }
  63
  64     // Allocate to and from queues
  65
  66     // Queues that are getting messages from protocol
  67     m_toNetQueues.resize(m_nodes);
  68
  69     // Queues that are feeding the protocol
  70     m_fromNetQueues.resize(m_nodes);
  71
  72     m_in_use.resize(m_virtual_networks);
  73     m_ordered.resize(m_virtual_networks);
  74     for (int i = 0; i < m_virtual_networks; i++) {
  75         m_in_use[i] = false;
  76         m_ordered[i] = false;
  77     }
  78
  79     for (int node = 0; node < m_nodes; node++) {
  80         // Setting number of virtual message buffers per Network Queue
  81         m_toNetQueues[node].resize(m_virtual_networks);
  82         m_fromNetQueues[node].resize(m_virtual_networks);
  83
  84         // Instantiating the Message Buffers that
  85         // interact with the coherence protocol
  86         for (int j = 0; j < m_virtual_networks; j++) {
  87             m_toNetQueues[node][j] = new MessageBuffer();
  88             m_fromNetQueues[node][j] = new MessageBuffer();
  89         }
  90     }
  91 }
  92
  93 void
  94 BaseGarnetNetwork::init()
  95 {
  96     Network::init();
  97 }
  98
  99 MessageBuffer*
 100 BaseGarnetNetwork::getToNetQueue(NodeID id, bool ordered, int network_num,
 101                                  string vnet_type)
 102 {
 103     checkNetworkAllocation(id, ordered, network_num, vnet_type);
 104     return m_toNetQueues[id][network_num];
 105 }
 106
 107 MessageBuffer*
 108 BaseGarnetNetwork::getFromNetQueue(NodeID id, bool ordered, int network_num,
 109                                    string vnet_type)
 110 {
 111     checkNetworkAllocation(id, ordered, network_num, vnet_type);
 112     return m_fromNetQueues[id][network_num];
 113 }
 114
 115 void
 116 BaseGarnetNetwork::regStats()
 117 {
 118     m_flits_received
 119         .init(m_virtual_networks)
 120         .name(name() + ".flits_received")
 121         .flags(Stats::pdf | Stats::total | Stats::nozero | Stats::oneline)
 122         ;
 123
 124     m_flits_injected
 125         .init(m_virtual_networks)
 126         .name(name() + ".flits_injected")
 127         .flags(Stats::pdf | Stats::total | Stats::nozero | Stats::oneline)
 128         ;
 129
 130     m_network_latency
 131         .init(m_virtual_networks)
 132         .name(name() + ".network_latency")
 133         .flags(Stats::oneline)
 134         ;
 135
 136     m_queueing_latency
 137         .init(m_virtual_networks)
 138         .name(name() + ".queueing_latency")
 139         .flags(Stats::oneline)
 140         ;
 141
 142     for (int i = 0; i < m_virtual_networks; i++) {
 143         m_flits_received.subname(i, csprintf("vnet-%i", i));
 144         m_flits_injected.subname(i, csprintf("vnet-%i", i));
 145         m_network_latency.subname(i, csprintf("vnet-%i", i));
 146         m_queueing_latency.subname(i, csprintf("vnet-%i", i));
 147     }
 148
 149     m_avg_vnet_latency
 150         .name(name() + ".average_vnet_latency")
 151         .flags(Stats::oneline);
 152     m_avg_vnet_latency = m_network_latency / m_flits_received;
 153
 154     m_avg_vqueue_latency
 155         .name(name() + ".average_vqueue_latency")
 156         .flags(Stats::oneline);
 157     m_avg_vqueue_latency = m_queueing_latency / m_flits_received;
 158
 159     m_avg_network_latency.name(name() + ".average_network_latency");
 160     m_avg_network_latency = sum(m_network_latency) / sum(m_flits_received);
 161
 162     m_avg_queueing_latency.name(name() + ".average_queueing_latency");
 163     m_avg_queueing_latency = sum(m_queueing_latency) / sum(m_flits_received);
 164
 165     m_avg_latency.name(name() + ".average_latency");
 166     m_avg_latency = m_avg_network_latency + m_avg_queueing_latency;
 167 }