traffic_gen.cc revision 9719
19241Sandreas.hansson@arm.com/* 29717Sandreas.hansson@arm.com * Copyright (c) 2012-2013 ARM Limited 39241Sandreas.hansson@arm.com * All rights reserved 49241Sandreas.hansson@arm.com * 59241Sandreas.hansson@arm.com * The license below extends only to copyright in the software and shall 69241Sandreas.hansson@arm.com * not be construed as granting a license to any other intellectual 79241Sandreas.hansson@arm.com * property including but not limited to intellectual property relating 89241Sandreas.hansson@arm.com * to a hardware implementation of the functionality of the software 99241Sandreas.hansson@arm.com * licensed hereunder. You may use the software subject to the license 109241Sandreas.hansson@arm.com * terms below provided that you ensure that this notice is replicated 119241Sandreas.hansson@arm.com * unmodified and in its entirety in all distributions of the software, 129241Sandreas.hansson@arm.com * modified or unmodified, in source code or in binary form. 139241Sandreas.hansson@arm.com * 149241Sandreas.hansson@arm.com * Redistribution and use in source and binary forms, with or without 159241Sandreas.hansson@arm.com * modification, are permitted provided that the following conditions are 169241Sandreas.hansson@arm.com * met: redistributions of source code must retain the above copyright 179241Sandreas.hansson@arm.com * notice, this list of conditions and the following disclaimer; 189241Sandreas.hansson@arm.com * redistributions in binary form must reproduce the above copyright 199241Sandreas.hansson@arm.com * notice, this list of conditions and the following disclaimer in the 209241Sandreas.hansson@arm.com * documentation and/or other materials provided with the distribution; 219241Sandreas.hansson@arm.com * neither the name of the copyright holders nor the names of its 229241Sandreas.hansson@arm.com * contributors may be used to endorse or promote products derived from 239241Sandreas.hansson@arm.com * this software without specific prior written permission. 249241Sandreas.hansson@arm.com * 259241Sandreas.hansson@arm.com * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 269241Sandreas.hansson@arm.com * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 279241Sandreas.hansson@arm.com * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 289241Sandreas.hansson@arm.com * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 299241Sandreas.hansson@arm.com * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 309241Sandreas.hansson@arm.com * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 319241Sandreas.hansson@arm.com * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 329241Sandreas.hansson@arm.com * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 339241Sandreas.hansson@arm.com * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 349241Sandreas.hansson@arm.com * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 359241Sandreas.hansson@arm.com * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 369241Sandreas.hansson@arm.com * 379241Sandreas.hansson@arm.com * Authors: Thomas Grass 389241Sandreas.hansson@arm.com * Andreas Hansson 399241Sandreas.hansson@arm.com * Sascha Bischoff 409241Sandreas.hansson@arm.com */ 419241Sandreas.hansson@arm.com 429241Sandreas.hansson@arm.com#include <sstream> 439241Sandreas.hansson@arm.com 449241Sandreas.hansson@arm.com#include "base/random.hh" 459241Sandreas.hansson@arm.com#include "cpu/testers/traffic_gen/traffic_gen.hh" 469241Sandreas.hansson@arm.com#include "debug/Checkpoint.hh" 479241Sandreas.hansson@arm.com#include "debug/TrafficGen.hh" 489241Sandreas.hansson@arm.com#include "sim/stats.hh" 499241Sandreas.hansson@arm.com#include "sim/system.hh" 509241Sandreas.hansson@arm.com 519241Sandreas.hansson@arm.comusing namespace std; 529241Sandreas.hansson@arm.com 539241Sandreas.hansson@arm.comTrafficGen::TrafficGen(const TrafficGenParams* p) 549241Sandreas.hansson@arm.com : MemObject(p), 559241Sandreas.hansson@arm.com system(p->system), 569241Sandreas.hansson@arm.com masterID(system->getMasterId(name())), 579718Sandreas.hansson@arm.com configFile(p->config_file), 589717Sandreas.hansson@arm.com nextTransitionTick(0), 599719Sandreas.hansson@arm.com nextPacketTick(0), 609241Sandreas.hansson@arm.com port(name() + ".port", *this), 619719Sandreas.hansson@arm.com retryPkt(NULL), 629719Sandreas.hansson@arm.com retryPktTick(0), 639719Sandreas.hansson@arm.com updateEvent(this), 649719Sandreas.hansson@arm.com drainManager(NULL) 659241Sandreas.hansson@arm.com{ 669241Sandreas.hansson@arm.com} 679241Sandreas.hansson@arm.com 689241Sandreas.hansson@arm.comTrafficGen* 699241Sandreas.hansson@arm.comTrafficGenParams::create() 709241Sandreas.hansson@arm.com{ 719241Sandreas.hansson@arm.com return new TrafficGen(this); 729241Sandreas.hansson@arm.com} 739241Sandreas.hansson@arm.com 749294Sandreas.hansson@arm.comBaseMasterPort& 759294Sandreas.hansson@arm.comTrafficGen::getMasterPort(const string& if_name, PortID idx) 769241Sandreas.hansson@arm.com{ 779241Sandreas.hansson@arm.com if (if_name == "port") { 789241Sandreas.hansson@arm.com return port; 799241Sandreas.hansson@arm.com } else { 809241Sandreas.hansson@arm.com return MemObject::getMasterPort(if_name, idx); 819241Sandreas.hansson@arm.com } 829241Sandreas.hansson@arm.com} 839241Sandreas.hansson@arm.com 849241Sandreas.hansson@arm.comvoid 859241Sandreas.hansson@arm.comTrafficGen::init() 869241Sandreas.hansson@arm.com{ 879241Sandreas.hansson@arm.com if (!port.isConnected()) 889241Sandreas.hansson@arm.com fatal("The port of %s is not connected!\n", name()); 899241Sandreas.hansson@arm.com 909241Sandreas.hansson@arm.com // if the system is in timing mode active the request generator 919524SAndreas.Sandberg@ARM.com if (system->isTimingMode()) { 929241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Timing mode, activating request generator\n"); 939241Sandreas.hansson@arm.com 949718Sandreas.hansson@arm.com parseConfig(); 959718Sandreas.hansson@arm.com 969241Sandreas.hansson@arm.com // enter initial state 979717Sandreas.hansson@arm.com enterState(currState); 989241Sandreas.hansson@arm.com } else { 999241Sandreas.hansson@arm.com DPRINTF(TrafficGen, 1009241Sandreas.hansson@arm.com "Traffic generator is only active in timing mode\n"); 1019241Sandreas.hansson@arm.com } 1029241Sandreas.hansson@arm.com} 1039241Sandreas.hansson@arm.com 1049241Sandreas.hansson@arm.comvoid 1059241Sandreas.hansson@arm.comTrafficGen::initState() 1069241Sandreas.hansson@arm.com{ 1079241Sandreas.hansson@arm.com // when not restoring from a checkpoint, make sure we kick things off 1089524SAndreas.Sandberg@ARM.com if (system->isTimingMode()) { 1099719Sandreas.hansson@arm.com // call nextPacketTick on the state to advance it 1109719Sandreas.hansson@arm.com nextPacketTick = states[currState]->nextPacketTick(); 1119719Sandreas.hansson@arm.com schedule(updateEvent, std::min(nextPacketTick, nextTransitionTick)); 1129241Sandreas.hansson@arm.com } else { 1139241Sandreas.hansson@arm.com DPRINTF(TrafficGen, 1149241Sandreas.hansson@arm.com "Traffic generator is only active in timing mode\n"); 1159241Sandreas.hansson@arm.com } 1169241Sandreas.hansson@arm.com} 1179241Sandreas.hansson@arm.com 1189241Sandreas.hansson@arm.comunsigned int 1199342SAndreas.Sandberg@arm.comTrafficGen::drain(DrainManager *dm) 1209241Sandreas.hansson@arm.com{ 1219719Sandreas.hansson@arm.com if (retryPkt == NULL) { 1229719Sandreas.hansson@arm.com // shut things down 1239719Sandreas.hansson@arm.com nextPacketTick = MaxTick; 1249719Sandreas.hansson@arm.com nextTransitionTick = MaxTick; 1259719Sandreas.hansson@arm.com deschedule(updateEvent); 1269719Sandreas.hansson@arm.com return 0; 1279719Sandreas.hansson@arm.com } else { 1289719Sandreas.hansson@arm.com drainManager = dm; 1299719Sandreas.hansson@arm.com return 1; 1309719Sandreas.hansson@arm.com } 1319241Sandreas.hansson@arm.com} 1329241Sandreas.hansson@arm.com 1339241Sandreas.hansson@arm.comvoid 1349241Sandreas.hansson@arm.comTrafficGen::serialize(ostream &os) 1359241Sandreas.hansson@arm.com{ 1369241Sandreas.hansson@arm.com DPRINTF(Checkpoint, "Serializing TrafficGen\n"); 1379241Sandreas.hansson@arm.com 1389241Sandreas.hansson@arm.com // save ticks of the graph event if it is scheduled 1399719Sandreas.hansson@arm.com Tick nextEvent = updateEvent.scheduled() ? updateEvent.when() : 0; 1409241Sandreas.hansson@arm.com 1419719Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Saving nextEvent=%llu\n", nextEvent); 1429241Sandreas.hansson@arm.com 1439717Sandreas.hansson@arm.com SERIALIZE_SCALAR(nextEvent); 1449241Sandreas.hansson@arm.com 1459241Sandreas.hansson@arm.com SERIALIZE_SCALAR(nextTransitionTick); 1469241Sandreas.hansson@arm.com 1479719Sandreas.hansson@arm.com SERIALIZE_SCALAR(nextPacketTick); 1489719Sandreas.hansson@arm.com 1499719Sandreas.hansson@arm.com SERIALIZE_SCALAR(currState); 1509241Sandreas.hansson@arm.com} 1519241Sandreas.hansson@arm.com 1529241Sandreas.hansson@arm.comvoid 1539241Sandreas.hansson@arm.comTrafficGen::unserialize(Checkpoint* cp, const string& section) 1549241Sandreas.hansson@arm.com{ 1559241Sandreas.hansson@arm.com // restore scheduled events 1569717Sandreas.hansson@arm.com Tick nextEvent; 1579717Sandreas.hansson@arm.com UNSERIALIZE_SCALAR(nextEvent); 1589717Sandreas.hansson@arm.com if (nextEvent != 0) { 1599717Sandreas.hansson@arm.com schedule(updateEvent, nextEvent); 1609241Sandreas.hansson@arm.com } 1619241Sandreas.hansson@arm.com 1629241Sandreas.hansson@arm.com UNSERIALIZE_SCALAR(nextTransitionTick); 1639719Sandreas.hansson@arm.com 1649719Sandreas.hansson@arm.com UNSERIALIZE_SCALAR(nextPacketTick); 1659719Sandreas.hansson@arm.com 1669719Sandreas.hansson@arm.com // @todo In the case of a stateful generator state such as the 1679719Sandreas.hansson@arm.com // trace player we would also have to restore the position in the 1689719Sandreas.hansson@arm.com // trace playback 1699719Sandreas.hansson@arm.com UNSERIALIZE_SCALAR(currState); 1709241Sandreas.hansson@arm.com} 1719241Sandreas.hansson@arm.com 1729241Sandreas.hansson@arm.comvoid 1739717Sandreas.hansson@arm.comTrafficGen::update() 1749241Sandreas.hansson@arm.com{ 1759717Sandreas.hansson@arm.com // if we have reached the time for the next state transition, then 1769717Sandreas.hansson@arm.com // perform the transition 1779717Sandreas.hansson@arm.com if (curTick() >= nextTransitionTick) { 1789717Sandreas.hansson@arm.com transition(); 1799717Sandreas.hansson@arm.com } else { 1809719Sandreas.hansson@arm.com assert(curTick() >= nextPacketTick); 1819719Sandreas.hansson@arm.com // get the next packet and try to send it 1829718Sandreas.hansson@arm.com PacketPtr pkt = states[currState]->getNextPacket(); 1839719Sandreas.hansson@arm.com numPackets++; 1849719Sandreas.hansson@arm.com if (!port.sendTimingReq(pkt)) { 1859719Sandreas.hansson@arm.com retryPkt = pkt; 1869719Sandreas.hansson@arm.com retryPktTick = curTick(); 1879719Sandreas.hansson@arm.com } 1889719Sandreas.hansson@arm.com } 1899719Sandreas.hansson@arm.com 1909719Sandreas.hansson@arm.com // if we are waiting for a retry, do not schedule any further 1919719Sandreas.hansson@arm.com // events, in the case of a transition or a successful send, go 1929719Sandreas.hansson@arm.com // ahead and determine when the next update should take place 1939719Sandreas.hansson@arm.com if (retryPkt == NULL) { 1949719Sandreas.hansson@arm.com // schedule next update event based on either the next execute 1959719Sandreas.hansson@arm.com // tick or the next transition, which ever comes first 1969719Sandreas.hansson@arm.com nextPacketTick = states[currState]->nextPacketTick(); 1979719Sandreas.hansson@arm.com Tick nextEventTick = std::min(nextPacketTick, nextTransitionTick); 1989719Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Next event scheduled at %lld\n", nextEventTick); 1999719Sandreas.hansson@arm.com schedule(updateEvent, nextEventTick); 2009717Sandreas.hansson@arm.com } 2019241Sandreas.hansson@arm.com} 2029241Sandreas.hansson@arm.com 2039241Sandreas.hansson@arm.comvoid 2049718Sandreas.hansson@arm.comTrafficGen::parseConfig() 2059241Sandreas.hansson@arm.com{ 2069241Sandreas.hansson@arm.com // keep track of the transitions parsed to create the matrix when 2079241Sandreas.hansson@arm.com // done 2089241Sandreas.hansson@arm.com vector<Transition> transitions; 2099241Sandreas.hansson@arm.com 2109241Sandreas.hansson@arm.com // open input file 2119241Sandreas.hansson@arm.com ifstream infile; 2129718Sandreas.hansson@arm.com infile.open(configFile.c_str(), ifstream::in); 2139241Sandreas.hansson@arm.com if (!infile.is_open()) { 2149241Sandreas.hansson@arm.com fatal("Traffic generator %s config file not found at %s\n", 2159718Sandreas.hansson@arm.com name(), configFile); 2169241Sandreas.hansson@arm.com } 2179241Sandreas.hansson@arm.com 2189241Sandreas.hansson@arm.com // read line by line and determine the action based on the first 2199241Sandreas.hansson@arm.com // keyword 2209241Sandreas.hansson@arm.com string keyword; 2219241Sandreas.hansson@arm.com string line; 2229241Sandreas.hansson@arm.com 2239241Sandreas.hansson@arm.com while (getline(infile, line).good()) { 2249241Sandreas.hansson@arm.com // see if this line is a comment line, and if so skip it 2259241Sandreas.hansson@arm.com if (line.find('#') != 1) { 2269241Sandreas.hansson@arm.com // create an input stream for the tokenization 2279241Sandreas.hansson@arm.com istringstream is(line); 2289241Sandreas.hansson@arm.com 2299241Sandreas.hansson@arm.com // determine the keyword 2309241Sandreas.hansson@arm.com is >> keyword; 2319241Sandreas.hansson@arm.com 2329241Sandreas.hansson@arm.com if (keyword == "STATE") { 2339241Sandreas.hansson@arm.com // parse the behaviour of this state 2349241Sandreas.hansson@arm.com uint32_t id; 2359241Sandreas.hansson@arm.com Tick duration; 2369241Sandreas.hansson@arm.com string mode; 2379241Sandreas.hansson@arm.com 2389241Sandreas.hansson@arm.com is >> id >> duration >> mode; 2399241Sandreas.hansson@arm.com 2409241Sandreas.hansson@arm.com if (mode == "TRACE") { 2419241Sandreas.hansson@arm.com string traceFile; 2429241Sandreas.hansson@arm.com Addr addrOffset; 2439241Sandreas.hansson@arm.com 2449241Sandreas.hansson@arm.com is >> traceFile >> addrOffset; 2459241Sandreas.hansson@arm.com 2469718Sandreas.hansson@arm.com states[id] = new TraceGen(name(), masterID, duration, 2479241Sandreas.hansson@arm.com traceFile, addrOffset); 2489241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "State: %d TraceGen\n", id); 2499241Sandreas.hansson@arm.com } else if (mode == "IDLE") { 2509718Sandreas.hansson@arm.com states[id] = new IdleGen(name(), masterID, duration); 2519241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "State: %d IdleGen\n", id); 2529241Sandreas.hansson@arm.com } else if (mode == "LINEAR" || mode == "RANDOM") { 2539241Sandreas.hansson@arm.com uint32_t read_percent; 2549241Sandreas.hansson@arm.com Addr start_addr; 2559241Sandreas.hansson@arm.com Addr end_addr; 2569241Sandreas.hansson@arm.com Addr blocksize; 2579241Sandreas.hansson@arm.com Tick min_period; 2589241Sandreas.hansson@arm.com Tick max_period; 2599241Sandreas.hansson@arm.com Addr data_limit; 2609241Sandreas.hansson@arm.com 2619241Sandreas.hansson@arm.com is >> read_percent >> start_addr >> end_addr >> 2629241Sandreas.hansson@arm.com blocksize >> min_period >> max_period >> data_limit; 2639241Sandreas.hansson@arm.com 2649241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "%s, addr %x to %x, size %d," 2659241Sandreas.hansson@arm.com " period %d to %d, %d%% reads\n", 2669241Sandreas.hansson@arm.com mode, start_addr, end_addr, blocksize, min_period, 2679241Sandreas.hansson@arm.com max_period, read_percent); 2689241Sandreas.hansson@arm.com 2699718Sandreas.hansson@arm.com 2709718Sandreas.hansson@arm.com if (port.deviceBlockSize() && 2719718Sandreas.hansson@arm.com blocksize > port.deviceBlockSize()) 2729718Sandreas.hansson@arm.com fatal("TrafficGen %s block size (%d) is larger than " 2739718Sandreas.hansson@arm.com "port block size (%d)\n", name(), 2749718Sandreas.hansson@arm.com blocksize, port.deviceBlockSize()); 2759718Sandreas.hansson@arm.com 2769241Sandreas.hansson@arm.com if (read_percent > 100) 2779718Sandreas.hansson@arm.com fatal("%s cannot have more than 100% reads", name()); 2789241Sandreas.hansson@arm.com 2799241Sandreas.hansson@arm.com if (mode == "LINEAR") { 2809718Sandreas.hansson@arm.com states[id] = new LinearGen(name(), masterID, 2819241Sandreas.hansson@arm.com duration, start_addr, 2829241Sandreas.hansson@arm.com end_addr, blocksize, 2839241Sandreas.hansson@arm.com min_period, max_period, 2849241Sandreas.hansson@arm.com read_percent, data_limit); 2859241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "State: %d LinearGen\n", id); 2869241Sandreas.hansson@arm.com } else if (mode == "RANDOM") { 2879718Sandreas.hansson@arm.com states[id] = new RandomGen(name(), masterID, 2889241Sandreas.hansson@arm.com duration, start_addr, 2899241Sandreas.hansson@arm.com end_addr, blocksize, 2909241Sandreas.hansson@arm.com min_period, max_period, 2919241Sandreas.hansson@arm.com read_percent, data_limit); 2929241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "State: %d RandomGen\n", id); 2939241Sandreas.hansson@arm.com } 2949241Sandreas.hansson@arm.com } else { 2959241Sandreas.hansson@arm.com fatal("%s: Unknown traffic generator mode: %s", 2969241Sandreas.hansson@arm.com name(), mode); 2979241Sandreas.hansson@arm.com } 2989241Sandreas.hansson@arm.com } else if (keyword == "TRANSITION") { 2999241Sandreas.hansson@arm.com Transition transition; 3009241Sandreas.hansson@arm.com 3019241Sandreas.hansson@arm.com is >> transition.from >> transition.to >> transition.p; 3029241Sandreas.hansson@arm.com 3039241Sandreas.hansson@arm.com transitions.push_back(transition); 3049241Sandreas.hansson@arm.com 3059241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Transition: %d -> %d\n", transition.from, 3069241Sandreas.hansson@arm.com transition.to); 3079241Sandreas.hansson@arm.com } else if (keyword == "INIT") { 3089241Sandreas.hansson@arm.com // set the initial state as the active state 3099241Sandreas.hansson@arm.com is >> currState; 3109241Sandreas.hansson@arm.com 3119241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Initial state: %d\n", currState); 3129241Sandreas.hansson@arm.com } 3139241Sandreas.hansson@arm.com } 3149241Sandreas.hansson@arm.com } 3159241Sandreas.hansson@arm.com 3169241Sandreas.hansson@arm.com // resize and populate state transition matrix 3179241Sandreas.hansson@arm.com transitionMatrix.resize(transitions.size()); 3189241Sandreas.hansson@arm.com for (size_t i = 0; i < transitions.size(); i++) { 3199241Sandreas.hansson@arm.com transitionMatrix[i].resize(transitions.size()); 3209241Sandreas.hansson@arm.com } 3219241Sandreas.hansson@arm.com 3229241Sandreas.hansson@arm.com for (vector<Transition>::iterator t = transitions.begin(); 3239241Sandreas.hansson@arm.com t != transitions.end(); ++t) { 3249241Sandreas.hansson@arm.com transitionMatrix[t->from][t->to] = t->p; 3259241Sandreas.hansson@arm.com } 3269241Sandreas.hansson@arm.com 3279241Sandreas.hansson@arm.com // ensure the egress edges do not have a probability larger than 3289241Sandreas.hansson@arm.com // one 3299241Sandreas.hansson@arm.com for (size_t i = 0; i < transitions.size(); i++) { 3309241Sandreas.hansson@arm.com double sum = 0; 3319241Sandreas.hansson@arm.com for (size_t j = 0; j < transitions.size(); j++) { 3329241Sandreas.hansson@arm.com sum += transitionMatrix[i][j]; 3339241Sandreas.hansson@arm.com } 3349241Sandreas.hansson@arm.com 3359241Sandreas.hansson@arm.com // avoid comparing floating point numbers 3369241Sandreas.hansson@arm.com if (abs(sum - 1.0) > 0.001) 3379241Sandreas.hansson@arm.com fatal("%s has transition probability != 1 for state %d\n", 3389241Sandreas.hansson@arm.com name(), i); 3399241Sandreas.hansson@arm.com } 3409241Sandreas.hansson@arm.com 3419241Sandreas.hansson@arm.com // close input file 3429241Sandreas.hansson@arm.com infile.close(); 3439241Sandreas.hansson@arm.com} 3449241Sandreas.hansson@arm.com 3459241Sandreas.hansson@arm.comvoid 3469717Sandreas.hansson@arm.comTrafficGen::transition() 3479241Sandreas.hansson@arm.com{ 3489241Sandreas.hansson@arm.com // exit the current state 3499241Sandreas.hansson@arm.com states[currState]->exit(); 3509241Sandreas.hansson@arm.com 3519241Sandreas.hansson@arm.com // determine next state 3529241Sandreas.hansson@arm.com double p = random_mt.gen_real1(); 3539241Sandreas.hansson@arm.com assert(currState < transitionMatrix.size()); 3549584Sandreas@sandberg.pp.se double cumulative = 0.0; 3559584Sandreas@sandberg.pp.se size_t i = 0; 3569584Sandreas@sandberg.pp.se do { 3579241Sandreas.hansson@arm.com cumulative += transitionMatrix[currState][i]; 3589241Sandreas.hansson@arm.com ++i; 3599584Sandreas@sandberg.pp.se } while (cumulative < p && i < transitionMatrix[currState].size()); 3609584Sandreas@sandberg.pp.se 3619584Sandreas@sandberg.pp.se enterState(i - 1); 3629241Sandreas.hansson@arm.com} 3639241Sandreas.hansson@arm.com 3649241Sandreas.hansson@arm.comvoid 3659717Sandreas.hansson@arm.comTrafficGen::enterState(uint32_t newState) 3669241Sandreas.hansson@arm.com{ 3679241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Transition to state %d\n", newState); 3689241Sandreas.hansson@arm.com 3699241Sandreas.hansson@arm.com currState = newState; 3709719Sandreas.hansson@arm.com // we could have been delayed and not transitioned on the exact 3719719Sandreas.hansson@arm.com // tick when we were supposed to (due to back pressure when 3729719Sandreas.hansson@arm.com // sending a packet) 3739719Sandreas.hansson@arm.com nextTransitionTick = curTick() + states[currState]->duration; 3749241Sandreas.hansson@arm.com states[currState]->enter(); 3759241Sandreas.hansson@arm.com} 3769241Sandreas.hansson@arm.com 3779719Sandreas.hansson@arm.comvoid 3789719Sandreas.hansson@arm.comTrafficGen::recvRetry() 3799719Sandreas.hansson@arm.com{ 3809719Sandreas.hansson@arm.com assert(retryPkt != NULL); 3819719Sandreas.hansson@arm.com 3829719Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Received retry\n"); 3839719Sandreas.hansson@arm.com numRetries++; 3849719Sandreas.hansson@arm.com // attempt to send the packet, and if we are successful start up 3859719Sandreas.hansson@arm.com // the machinery again 3869719Sandreas.hansson@arm.com if (port.sendTimingReq(retryPkt)) { 3879719Sandreas.hansson@arm.com retryPkt = NULL; 3889719Sandreas.hansson@arm.com // remember how much delay was incurred due to back-pressure 3899719Sandreas.hansson@arm.com // when sending the request 3909719Sandreas.hansson@arm.com Tick delay = curTick() - retryPktTick; 3919719Sandreas.hansson@arm.com retryPktTick = 0; 3929719Sandreas.hansson@arm.com retryTicks += delay; 3939719Sandreas.hansson@arm.com 3949719Sandreas.hansson@arm.com if (drainManager == NULL) { 3959719Sandreas.hansson@arm.com // packet is sent, so find out when the next one is due 3969719Sandreas.hansson@arm.com nextPacketTick = states[currState]->nextPacketTick(); 3979719Sandreas.hansson@arm.com Tick nextEventTick = std::min(nextPacketTick, nextTransitionTick); 3989719Sandreas.hansson@arm.com schedule(updateEvent, std::max(curTick(), nextEventTick)); 3999719Sandreas.hansson@arm.com } else { 4009719Sandreas.hansson@arm.com // shut things down 4019719Sandreas.hansson@arm.com nextPacketTick = MaxTick; 4029719Sandreas.hansson@arm.com nextTransitionTick = MaxTick; 4039719Sandreas.hansson@arm.com drainManager->signalDrainDone(); 4049719Sandreas.hansson@arm.com // Clear the drain event once we're done with it. 4059719Sandreas.hansson@arm.com drainManager = NULL; 4069719Sandreas.hansson@arm.com } 4079719Sandreas.hansson@arm.com } 4089719Sandreas.hansson@arm.com} 4099719Sandreas.hansson@arm.com 4109719Sandreas.hansson@arm.comvoid 4119719Sandreas.hansson@arm.comTrafficGen::regStats() 4129719Sandreas.hansson@arm.com{ 4139719Sandreas.hansson@arm.com // Initialise all the stats 4149719Sandreas.hansson@arm.com using namespace Stats; 4159719Sandreas.hansson@arm.com 4169719Sandreas.hansson@arm.com numPackets 4179719Sandreas.hansson@arm.com .name(name() + ".numPackets") 4189719Sandreas.hansson@arm.com .desc("Number of packets generated"); 4199719Sandreas.hansson@arm.com 4209719Sandreas.hansson@arm.com numRetries 4219719Sandreas.hansson@arm.com .name(name() + ".numRetries") 4229719Sandreas.hansson@arm.com .desc("Number of retries"); 4239719Sandreas.hansson@arm.com 4249719Sandreas.hansson@arm.com retryTicks 4259719Sandreas.hansson@arm.com .name(name() + ".retryTicks") 4269719Sandreas.hansson@arm.com .desc("Time spent waiting due to back-pressure (ticks)"); 4279719Sandreas.hansson@arm.com} 4289719Sandreas.hansson@arm.com 4299241Sandreas.hansson@arm.combool 4309241Sandreas.hansson@arm.comTrafficGen::TrafficGenPort::recvTimingResp(PacketPtr pkt) 4319241Sandreas.hansson@arm.com{ 4329241Sandreas.hansson@arm.com delete pkt->req; 4339241Sandreas.hansson@arm.com delete pkt; 4349241Sandreas.hansson@arm.com 4359241Sandreas.hansson@arm.com return true; 4369241Sandreas.hansson@arm.com} 437