Switch.cc revision 9866:94dac7d7bb88
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 <numeric> 30 31#include "base/cast.hh" 32#include "base/stl_helpers.hh" 33#include "mem/ruby/buffers/MessageBuffer.hh" 34#include "mem/ruby/network/simple/PerfectSwitch.hh" 35#include "mem/ruby/network/simple/SimpleNetwork.hh" 36#include "mem/ruby/network/simple/Switch.hh" 37#include "mem/ruby/network/simple/Throttle.hh" 38 39using namespace std; 40using m5::stl_helpers::deletePointers; 41using m5::stl_helpers::operator<<; 42 43Switch::Switch(const Params *p) : BasicRouter(p) 44{ 45 m_perfect_switch = new PerfectSwitch(m_id, this, p->virt_nets); 46} 47 48Switch::~Switch() 49{ 50 delete m_perfect_switch; 51 52 // Delete throttles (one per output port) 53 deletePointers(m_throttles); 54 55 // Delete MessageBuffers 56 deletePointers(m_buffers_to_free); 57} 58 59void 60Switch::init() 61{ 62 BasicRouter::init(); 63 m_perfect_switch->init(m_network_ptr); 64} 65 66void 67Switch::addInPort(const vector<MessageBuffer*>& in) 68{ 69 m_perfect_switch->addInPort(in); 70 71 for (int i = 0; i < in.size(); i++) { 72 in[i]->setReceiver(this); 73 } 74} 75 76void 77Switch::addOutPort(const vector<MessageBuffer*>& out, 78 const NetDest& routing_table_entry, Cycles link_latency, int bw_multiplier) 79{ 80 // Create a throttle 81 Throttle* throttle_ptr = new Throttle(m_id, m_throttles.size(), 82 link_latency, bw_multiplier, m_network_ptr->getEndpointBandwidth(), 83 this); 84 m_throttles.push_back(throttle_ptr); 85 86 // Create one buffer per vnet (these are intermediaryQueues) 87 vector<MessageBuffer*> intermediateBuffers; 88 for (int i = 0; i < out.size(); i++) { 89 out[i]->setSender(this); 90 91 MessageBuffer* buffer_ptr = new MessageBuffer; 92 // Make these queues ordered 93 buffer_ptr->setOrdering(true); 94 if (m_network_ptr->getBufferSize() > 0) { 95 buffer_ptr->resize(m_network_ptr->getBufferSize()); 96 } 97 98 intermediateBuffers.push_back(buffer_ptr); 99 m_buffers_to_free.push_back(buffer_ptr); 100 101 buffer_ptr->setSender(this); 102 buffer_ptr->setReceiver(this); 103 } 104 105 // Hook the queues to the PerfectSwitch 106 m_perfect_switch->addOutPort(intermediateBuffers, routing_table_entry); 107 108 // Hook the queues to the Throttle 109 throttle_ptr->addLinks(intermediateBuffers, out); 110} 111 112const Throttle* 113Switch::getThrottle(LinkID link_number) const 114{ 115 assert(m_throttles[link_number] != NULL); 116 return m_throttles[link_number]; 117} 118 119const vector<Throttle*>* 120Switch::getThrottles() const 121{ 122 return &m_throttles; 123} 124 125void 126Switch::regStats() 127{ 128 for (int link = 0; link < m_throttles.size(); link++) { 129 m_throttles[link]->regStats(name()); 130 } 131 132 m_avg_utilization.name(name() + ".percent_links_utilized"); 133 for (unsigned int i = 0; i < m_throttles.size(); i++) { 134 m_avg_utilization += m_throttles[i]->getUtilization(); 135 } 136 m_avg_utilization /= Stats::constant(m_throttles.size()); 137 138 for (unsigned int type = MessageSizeType_FIRST; 139 type < MessageSizeType_NUM; ++type) { 140 m_msg_counts[type] 141 .name(name() + ".msg_count." + 142 MessageSizeType_to_string(MessageSizeType(type))) 143 .flags(Stats::nozero) 144 ; 145 m_msg_bytes[type] 146 .name(name() + ".msg_bytes." + 147 MessageSizeType_to_string(MessageSizeType(type))) 148 .flags(Stats::nozero) 149 ; 150 151 for (unsigned int i = 0; i < m_throttles.size(); i++) { 152 m_msg_counts[type] += m_throttles[i]->getMsgCount(type); 153 } 154 m_msg_bytes[type] = m_msg_counts[type] * Stats::constant( 155 Network::MessageSizeType_to_int(MessageSizeType(type))); 156 } 157} 158 159void 160Switch::resetStats() 161{ 162 m_perfect_switch->clearStats(); 163 for (int i = 0; i < m_throttles.size(); i++) { 164 m_throttles[i]->clearStats(); 165 } 166} 167 168void 169Switch::collateStats() 170{ 171 m_perfect_switch->collateStats(); 172 for (int i = 0; i < m_throttles.size(); i++) { 173 m_throttles[i]->collateStats(); 174 } 175} 176 177void 178Switch::print(std::ostream& out) const 179{ 180 // FIXME printing 181 out << "[Switch]"; 182} 183 184bool 185Switch::functionalRead(Packet *pkt) 186{ 187 // Access the buffers in the switch for performing a functional read 188 for (unsigned int i = 0; i < m_buffers_to_free.size(); ++i) { 189 if (m_buffers_to_free[i]->functionalRead(pkt)) { 190 return true; 191 } 192 } 193 return false; 194} 195 196uint32_t 197Switch::functionalWrite(Packet *pkt) 198{ 199 // Access the buffers in the switch for performing a functional write 200 uint32_t num_functional_writes = 0; 201 for (unsigned int i = 0; i < m_buffers_to_free.size(); ++i) { 202 num_functional_writes += m_buffers_to_free[i]->functionalWrite(pkt); 203 } 204 return num_functional_writes; 205} 206 207Switch * 208SwitchParams::create() 209{ 210 return new Switch(this); 211} 212