SimpleNetwork.cc revision 10917
1/* 2 * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood 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 29#include <cassert> 30#include <numeric> 31 32#include "base/cast.hh" 33#include "base/stl_helpers.hh" 34#include "mem/ruby/common/NetDest.hh" 35#include "mem/ruby/network/MessageBuffer.hh" 36#include "mem/ruby/network/simple/SimpleLink.hh" 37#include "mem/ruby/network/simple/SimpleNetwork.hh" 38#include "mem/ruby/network/simple/Switch.hh" 39#include "mem/ruby/network/simple/Throttle.hh" 40#include "mem/ruby/profiler/Profiler.hh" 41#include "mem/ruby/system/System.hh" 42 43using namespace std; 44using m5::stl_helpers::deletePointers; 45 46SimpleNetwork::SimpleNetwork(const Params *p) 47 : Network(p) 48{ 49 m_buffer_size = p->buffer_size; 50 m_endpoint_bandwidth = p->endpoint_bandwidth; 51 m_adaptive_routing = p->adaptive_routing; 52 53 // Note: the parent Network Object constructor is called before the 54 // SimpleNetwork child constructor. Therefore, the member variables 55 // used below should already be initialized. 56 m_endpoint_switches.resize(m_nodes); 57 58 // record the routers 59 for (vector<BasicRouter*>::const_iterator i = p->routers.begin(); 60 i != p->routers.end(); ++i) { 61 Switch* s = safe_cast<Switch*>(*i); 62 m_switches.push_back(s); 63 s->init_net_ptr(this); 64 } 65} 66 67void 68SimpleNetwork::init() 69{ 70 Network::init(); 71 72 // The topology pointer should have already been initialized in 73 // the parent class network constructor. 74 assert(m_topology_ptr != NULL); 75 m_topology_ptr->createLinks(this); 76} 77 78SimpleNetwork::~SimpleNetwork() 79{ 80 deletePointers(m_switches); 81 deletePointers(m_buffers_to_free); 82} 83 84// From a switch to an endpoint node 85void 86SimpleNetwork::makeOutLink(SwitchID src, NodeID dest, BasicLink* link, 87 LinkDirection direction, 88 const NetDest& routing_table_entry) 89{ 90 assert(dest < m_nodes); 91 assert(src < m_switches.size()); 92 assert(m_switches[src] != NULL); 93 94 SimpleExtLink *simple_link = safe_cast<SimpleExtLink*>(link); 95 96 m_switches[src]->addOutPort(m_fromNetQueues[dest], routing_table_entry, 97 simple_link->m_latency, 98 simple_link->m_bw_multiplier); 99 100 m_endpoint_switches[dest] = m_switches[src]; 101} 102 103// From an endpoint node to a switch 104void 105SimpleNetwork::makeInLink(NodeID src, SwitchID dest, BasicLink* link, 106 LinkDirection direction, 107 const NetDest& routing_table_entry) 108{ 109 assert(src < m_nodes); 110 m_switches[dest]->addInPort(m_toNetQueues[src]); 111} 112 113// From a switch to a switch 114void 115SimpleNetwork::makeInternalLink(SwitchID src, SwitchID dest, BasicLink* link, 116 LinkDirection direction, 117 const NetDest& routing_table_entry) 118{ 119 // Create a set of new MessageBuffers 120 std::vector<MessageBuffer*> queues(m_virtual_networks); 121 122 for (int i = 0; i < m_virtual_networks; i++) { 123 // allocate a buffer 124 MessageBuffer* buffer_ptr = new MessageBuffer; 125 buffer_ptr->setOrdering(true); 126 127 if (m_buffer_size > 0) { 128 buffer_ptr->resize(m_buffer_size); 129 } 130 131 queues[i] = buffer_ptr; 132 // remember to deallocate it 133 m_buffers_to_free.push_back(buffer_ptr); 134 } 135 136 // Connect it to the two switches 137 SimpleIntLink *simple_link = safe_cast<SimpleIntLink*>(link); 138 139 m_switches[dest]->addInPort(queues); 140 m_switches[src]->addOutPort(queues, routing_table_entry, 141 simple_link->m_latency, 142 simple_link->m_bw_multiplier); 143} 144 145void 146SimpleNetwork::checkNetworkAllocation(NodeID id, bool ordered, int network_num) 147{ 148 assert(id < m_nodes); 149 assert(network_num < m_virtual_networks); 150 151 if (ordered) { 152 m_ordered[network_num] = true; 153 } 154 m_in_use[network_num] = true; 155} 156 157void 158SimpleNetwork::setToNetQueue(NodeID id, bool ordered, int network_num, 159 std::string vnet_type, MessageBuffer *b) 160{ 161 checkNetworkAllocation(id, ordered, network_num); 162 while (m_toNetQueues[id].size() <= network_num) { 163 m_toNetQueues[id].push_back(nullptr); 164 } 165 m_toNetQueues[id][network_num] = b; 166} 167 168void 169SimpleNetwork::setFromNetQueue(NodeID id, bool ordered, int network_num, 170 std::string vnet_type, MessageBuffer *b) 171{ 172 checkNetworkAllocation(id, ordered, network_num); 173 while (m_fromNetQueues[id].size() <= network_num) { 174 m_fromNetQueues[id].push_back(nullptr); 175 } 176 m_fromNetQueues[id][network_num] = b; 177} 178 179void 180SimpleNetwork::regStats() 181{ 182 for (MessageSizeType type = MessageSizeType_FIRST; 183 type < MessageSizeType_NUM; ++type) { 184 m_msg_counts[(unsigned int) type] 185 .name(name() + ".msg_count." + MessageSizeType_to_string(type)) 186 .flags(Stats::nozero) 187 ; 188 m_msg_bytes[(unsigned int) type] 189 .name(name() + ".msg_byte." + MessageSizeType_to_string(type)) 190 .flags(Stats::nozero) 191 ; 192 193 // Now state what the formula is. 194 for (int i = 0; i < m_switches.size(); i++) { 195 m_msg_counts[(unsigned int) type] += 196 sum(m_switches[i]->getMsgCount(type)); 197 } 198 199 m_msg_bytes[(unsigned int) type] = 200 m_msg_counts[(unsigned int) type] * Stats::constant( 201 Network::MessageSizeType_to_int(type)); 202 } 203} 204 205void 206SimpleNetwork::collateStats() 207{ 208 for (int i = 0; i < m_switches.size(); i++) { 209 m_switches[i]->collateStats(); 210 } 211} 212 213void 214SimpleNetwork::print(ostream& out) const 215{ 216 out << "[SimpleNetwork]"; 217} 218 219SimpleNetwork * 220SimpleNetworkParams::create() 221{ 222 return new SimpleNetwork(this); 223} 224 225/* 226 * The simple network has an array of switches. These switches have buffers 227 * that need to be accessed for functional reads and writes. Also the links 228 * between different switches have buffers that need to be accessed. 229 */ 230bool 231SimpleNetwork::functionalRead(Packet *pkt) 232{ 233 for (unsigned int i = 0; i < m_switches.size(); i++) { 234 if (m_switches[i]->functionalRead(pkt)) { 235 return true; 236 } 237 } 238 239 for (unsigned int i = 0; i < m_buffers_to_free.size(); ++i) { 240 if (m_buffers_to_free[i]->functionalRead(pkt)) { 241 return true; 242 } 243 } 244 245 return false; 246} 247 248uint32_t 249SimpleNetwork::functionalWrite(Packet *pkt) 250{ 251 uint32_t num_functional_writes = 0; 252 253 for (unsigned int i = 0; i < m_switches.size(); i++) { 254 num_functional_writes += m_switches[i]->functionalWrite(pkt); 255 } 256 257 for (unsigned int i = 0; i < m_buffers_to_free.size(); ++i) { 258 num_functional_writes += m_buffers_to_free[i]->functionalWrite(pkt); 259 } 260 return num_functional_writes; 261} 262