SimpleNetwork.cc revision 11113:5a2e1b1b5c43
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/RubySystem.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 m_int_link_buffers = p->int_link_buffers; 67 m_num_connected_buffers = 0; 68} 69 70void 71SimpleNetwork::init() 72{ 73 Network::init(); 74 75 // The topology pointer should have already been initialized in 76 // the parent class network constructor. 77 assert(m_topology_ptr != NULL); 78 m_topology_ptr->createLinks(this); 79} 80 81SimpleNetwork::~SimpleNetwork() 82{ 83 deletePointers(m_switches); 84 deletePointers(m_int_link_buffers); 85} 86 87// From a switch to an endpoint node 88void 89SimpleNetwork::makeOutLink(SwitchID src, NodeID dest, BasicLink* link, 90 LinkDirection direction, 91 const NetDest& routing_table_entry) 92{ 93 assert(dest < m_nodes); 94 assert(src < m_switches.size()); 95 assert(m_switches[src] != NULL); 96 97 SimpleExtLink *simple_link = safe_cast<SimpleExtLink*>(link); 98 99 m_switches[src]->addOutPort(m_fromNetQueues[dest], routing_table_entry, 100 simple_link->m_latency, 101 simple_link->m_bw_multiplier); 102 103 m_endpoint_switches[dest] = m_switches[src]; 104} 105 106// From an endpoint node to a switch 107void 108SimpleNetwork::makeInLink(NodeID src, SwitchID dest, BasicLink* link, 109 LinkDirection direction, 110 const NetDest& routing_table_entry) 111{ 112 assert(src < m_nodes); 113 m_switches[dest]->addInPort(m_toNetQueues[src]); 114} 115 116// From a switch to a switch 117void 118SimpleNetwork::makeInternalLink(SwitchID src, SwitchID dest, BasicLink* link, 119 LinkDirection direction, 120 const NetDest& routing_table_entry) 121{ 122 // Create a set of new MessageBuffers 123 std::vector<MessageBuffer*> queues(m_virtual_networks); 124 125 for (int i = 0; i < m_virtual_networks; i++) { 126 // allocate a buffer 127 assert(m_num_connected_buffers < m_int_link_buffers.size()); 128 MessageBuffer* buffer_ptr = m_int_link_buffers[m_num_connected_buffers]; 129 m_num_connected_buffers++; 130 queues[i] = buffer_ptr; 131 } 132 133 // Connect it to the two switches 134 SimpleIntLink *simple_link = safe_cast<SimpleIntLink*>(link); 135 136 m_switches[dest]->addInPort(queues); 137 m_switches[src]->addOutPort(queues, routing_table_entry, 138 simple_link->m_latency, 139 simple_link->m_bw_multiplier); 140} 141 142void 143SimpleNetwork::regStats() 144{ 145 for (MessageSizeType type = MessageSizeType_FIRST; 146 type < MessageSizeType_NUM; ++type) { 147 m_msg_counts[(unsigned int) type] 148 .name(name() + ".msg_count." + MessageSizeType_to_string(type)) 149 .flags(Stats::nozero) 150 ; 151 m_msg_bytes[(unsigned int) type] 152 .name(name() + ".msg_byte." + MessageSizeType_to_string(type)) 153 .flags(Stats::nozero) 154 ; 155 156 // Now state what the formula is. 157 for (int i = 0; i < m_switches.size(); i++) { 158 m_msg_counts[(unsigned int) type] += 159 sum(m_switches[i]->getMsgCount(type)); 160 } 161 162 m_msg_bytes[(unsigned int) type] = 163 m_msg_counts[(unsigned int) type] * Stats::constant( 164 Network::MessageSizeType_to_int(type)); 165 } 166} 167 168void 169SimpleNetwork::collateStats() 170{ 171 for (int i = 0; i < m_switches.size(); i++) { 172 m_switches[i]->collateStats(); 173 } 174} 175 176void 177SimpleNetwork::print(ostream& out) const 178{ 179 out << "[SimpleNetwork]"; 180} 181 182SimpleNetwork * 183SimpleNetworkParams::create() 184{ 185 return new SimpleNetwork(this); 186} 187 188/* 189 * The simple network has an array of switches. These switches have buffers 190 * that need to be accessed for functional reads and writes. Also the links 191 * between different switches have buffers that need to be accessed. 192 */ 193bool 194SimpleNetwork::functionalRead(Packet *pkt) 195{ 196 for (unsigned int i = 0; i < m_switches.size(); i++) { 197 if (m_switches[i]->functionalRead(pkt)) { 198 return true; 199 } 200 } 201 202 for (unsigned int i = 0; i < m_int_link_buffers.size(); ++i) { 203 if (m_int_link_buffers[i]->functionalRead(pkt)) { 204 return true; 205 } 206 } 207 208 return false; 209} 210 211uint32_t 212SimpleNetwork::functionalWrite(Packet *pkt) 213{ 214 uint32_t num_functional_writes = 0; 215 216 for (unsigned int i = 0; i < m_switches.size(); i++) { 217 num_functional_writes += m_switches[i]->functionalWrite(pkt); 218 } 219 220 for (unsigned int i = 0; i < m_int_link_buffers.size(); ++i) { 221 num_functional_writes += m_int_link_buffers[i]->functionalWrite(pkt); 222 } 223 return num_functional_writes; 224} 225