src/mem/ruby/network/garnet/flexible-pipeline/NetworkLink.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/network/garnet/flexible-pipeline/NetworkLink.hh"
  32 #include "mem/ruby/network/garnet/flexible-pipeline/GarnetNetwork.hh"
  33
  34 NetworkLink::NetworkLink(int id, int latency, GarnetNetwork *net_ptr)
  35 {
  36         m_id = id;
  37         linkBuffer = new flitBuffer();
  38         m_in_port = 0;
  39         m_out_port = 0;
  40         m_link_utilized = 0;
  41         m_net_ptr = net_ptr;
  42         m_latency = latency;
  43         int num_net = net_ptr->getNumberOfVirtualNetworks();
  44         int num_vc = m_net_ptr->getVCsPerClass();
  45         m_vc_load.setSize(num_net*num_vc);
  46
  47         for(int i = 0; i < num_net*num_vc; i++)
  48                 m_vc_load[i] = 0;
  49 }
  50
  51 NetworkLink::~NetworkLink()
  52 {
  53         delete linkBuffer;
  54 }
  55
  56 int NetworkLink::get_id()
  57 {
  58         return m_id;
  59 }
  60
  61 void NetworkLink::setLinkConsumer(FlexibleConsumer *consumer)
  62 {
  63         link_consumer = consumer;
  64 }
  65
  66 void NetworkLink::setSourceQueue(flitBuffer *srcQueue)
  67 {
  68         link_srcQueue = srcQueue;
  69 }
  70
  71 void NetworkLink::setSource(FlexibleConsumer *source)
  72 {
  73         link_source = source;
  74 }
  75 void NetworkLink::request_vc_link(int vc, NetDest destination, Time request_time)
  76 {
  77         link_consumer->request_vc(vc, m_in_port, destination, request_time);
  78 }
  79 bool NetworkLink::isBufferNotFull_link(int vc)
  80 {
  81         return link_consumer->isBufferNotFull(vc, m_in_port);
  82 }
  83
  84 void NetworkLink::grant_vc_link(int vc, Time grant_time)
  85 {
  86         link_source->grant_vc(m_out_port, vc, grant_time);
  87 }
  88
  89 void NetworkLink::release_vc_link(int vc, Time release_time)
  90 {
  91         link_source->release_vc(m_out_port, vc, release_time);
  92 }
  93
  94 Vector<int> NetworkLink::getVcLoad()
  95 {
  96         return m_vc_load;
  97 }
  98
  99 double NetworkLink::getLinkUtilization()
 100 {
 101         Time m_ruby_start = m_net_ptr->getRubyStartTime();
 102         return (double(m_link_utilized)) / (double(g_eventQueue_ptr->getTime()-m_ruby_start));
 103 }
 104
 105 bool NetworkLink::isReady()
 106 {
 107         return linkBuffer->isReady();
 108 }
 109
 110 void NetworkLink::setInPort(int port)
 111 {
 112         m_in_port = port;
 113 }
 114
 115 void NetworkLink::setOutPort(int port)
 116 {
 117         m_out_port = port;
 118 }
 119
 120 void NetworkLink::wakeup()
 121 {
 122         if(link_srcQueue->isReady())
 123         {
 124                 flit *t_flit = link_srcQueue->getTopFlit();
 125                 t_flit->set_time(g_eventQueue_ptr->getTime() + m_latency);
 126                 linkBuffer->insert(t_flit);
 127                 g_eventQueue_ptr->scheduleEvent(link_consumer, m_latency);
 128                 m_link_utilized++;
 129                 m_vc_load[t_flit->get_vc()]++;
 130         }
 131 }
 132
 133 flit* NetworkLink::peekLink()
 134 {
 135         return linkBuffer->peekTopFlit();
 136 }
 137
 138 flit* NetworkLink::consumeLink()
 139 {
 140         return linkBuffer->getTopFlit();
 141 }