traffic_gen.cc revision 9721
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), 589720Sandreas.hansson@arm.com elasticReq(p->elastic_req), 599717Sandreas.hansson@arm.com nextTransitionTick(0), 609719Sandreas.hansson@arm.com nextPacketTick(0), 619241Sandreas.hansson@arm.com port(name() + ".port", *this), 629719Sandreas.hansson@arm.com retryPkt(NULL), 639719Sandreas.hansson@arm.com retryPktTick(0), 649719Sandreas.hansson@arm.com updateEvent(this), 659719Sandreas.hansson@arm.com drainManager(NULL) 669241Sandreas.hansson@arm.com{ 679241Sandreas.hansson@arm.com} 689241Sandreas.hansson@arm.com 699241Sandreas.hansson@arm.comTrafficGen* 709241Sandreas.hansson@arm.comTrafficGenParams::create() 719241Sandreas.hansson@arm.com{ 729241Sandreas.hansson@arm.com return new TrafficGen(this); 739241Sandreas.hansson@arm.com} 749241Sandreas.hansson@arm.com 759294Sandreas.hansson@arm.comBaseMasterPort& 769294Sandreas.hansson@arm.comTrafficGen::getMasterPort(const string& if_name, PortID idx) 779241Sandreas.hansson@arm.com{ 789241Sandreas.hansson@arm.com if (if_name == "port") { 799241Sandreas.hansson@arm.com return port; 809241Sandreas.hansson@arm.com } else { 819241Sandreas.hansson@arm.com return MemObject::getMasterPort(if_name, idx); 829241Sandreas.hansson@arm.com } 839241Sandreas.hansson@arm.com} 849241Sandreas.hansson@arm.com 859241Sandreas.hansson@arm.comvoid 869241Sandreas.hansson@arm.comTrafficGen::init() 879241Sandreas.hansson@arm.com{ 889241Sandreas.hansson@arm.com if (!port.isConnected()) 899241Sandreas.hansson@arm.com fatal("The port of %s is not connected!\n", name()); 909241Sandreas.hansson@arm.com 919241Sandreas.hansson@arm.com // if the system is in timing mode active the request generator 929524SAndreas.Sandberg@ARM.com if (system->isTimingMode()) { 939241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Timing mode, activating request generator\n"); 949241Sandreas.hansson@arm.com 959718Sandreas.hansson@arm.com parseConfig(); 969718Sandreas.hansson@arm.com 979241Sandreas.hansson@arm.com // enter initial state 989717Sandreas.hansson@arm.com enterState(currState); 999241Sandreas.hansson@arm.com } else { 1009241Sandreas.hansson@arm.com DPRINTF(TrafficGen, 1019241Sandreas.hansson@arm.com "Traffic generator is only active in timing mode\n"); 1029241Sandreas.hansson@arm.com } 1039241Sandreas.hansson@arm.com} 1049241Sandreas.hansson@arm.com 1059241Sandreas.hansson@arm.comvoid 1069241Sandreas.hansson@arm.comTrafficGen::initState() 1079241Sandreas.hansson@arm.com{ 1089241Sandreas.hansson@arm.com // when not restoring from a checkpoint, make sure we kick things off 1099524SAndreas.Sandberg@ARM.com if (system->isTimingMode()) { 1109719Sandreas.hansson@arm.com // call nextPacketTick on the state to advance it 1119720Sandreas.hansson@arm.com nextPacketTick = states[currState]->nextPacketTick(elasticReq, 0); 1129719Sandreas.hansson@arm.com schedule(updateEvent, std::min(nextPacketTick, nextTransitionTick)); 1139241Sandreas.hansson@arm.com } else { 1149241Sandreas.hansson@arm.com DPRINTF(TrafficGen, 1159241Sandreas.hansson@arm.com "Traffic generator is only active in timing mode\n"); 1169241Sandreas.hansson@arm.com } 1179241Sandreas.hansson@arm.com} 1189241Sandreas.hansson@arm.com 1199241Sandreas.hansson@arm.comunsigned int 1209342SAndreas.Sandberg@arm.comTrafficGen::drain(DrainManager *dm) 1219241Sandreas.hansson@arm.com{ 1229719Sandreas.hansson@arm.com if (retryPkt == NULL) { 1239719Sandreas.hansson@arm.com // shut things down 1249719Sandreas.hansson@arm.com nextPacketTick = MaxTick; 1259719Sandreas.hansson@arm.com nextTransitionTick = MaxTick; 1269719Sandreas.hansson@arm.com deschedule(updateEvent); 1279719Sandreas.hansson@arm.com return 0; 1289719Sandreas.hansson@arm.com } else { 1299719Sandreas.hansson@arm.com drainManager = dm; 1309719Sandreas.hansson@arm.com return 1; 1319719Sandreas.hansson@arm.com } 1329241Sandreas.hansson@arm.com} 1339241Sandreas.hansson@arm.com 1349241Sandreas.hansson@arm.comvoid 1359241Sandreas.hansson@arm.comTrafficGen::serialize(ostream &os) 1369241Sandreas.hansson@arm.com{ 1379241Sandreas.hansson@arm.com DPRINTF(Checkpoint, "Serializing TrafficGen\n"); 1389241Sandreas.hansson@arm.com 1399241Sandreas.hansson@arm.com // save ticks of the graph event if it is scheduled 1409719Sandreas.hansson@arm.com Tick nextEvent = updateEvent.scheduled() ? updateEvent.when() : 0; 1419241Sandreas.hansson@arm.com 1429719Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Saving nextEvent=%llu\n", nextEvent); 1439241Sandreas.hansson@arm.com 1449717Sandreas.hansson@arm.com SERIALIZE_SCALAR(nextEvent); 1459241Sandreas.hansson@arm.com 1469241Sandreas.hansson@arm.com SERIALIZE_SCALAR(nextTransitionTick); 1479241Sandreas.hansson@arm.com 1489719Sandreas.hansson@arm.com SERIALIZE_SCALAR(nextPacketTick); 1499719Sandreas.hansson@arm.com 1509719Sandreas.hansson@arm.com SERIALIZE_SCALAR(currState); 1519241Sandreas.hansson@arm.com} 1529241Sandreas.hansson@arm.com 1539241Sandreas.hansson@arm.comvoid 1549241Sandreas.hansson@arm.comTrafficGen::unserialize(Checkpoint* cp, const string& section) 1559241Sandreas.hansson@arm.com{ 1569241Sandreas.hansson@arm.com // restore scheduled events 1579717Sandreas.hansson@arm.com Tick nextEvent; 1589717Sandreas.hansson@arm.com UNSERIALIZE_SCALAR(nextEvent); 1599717Sandreas.hansson@arm.com if (nextEvent != 0) { 1609717Sandreas.hansson@arm.com schedule(updateEvent, nextEvent); 1619241Sandreas.hansson@arm.com } 1629241Sandreas.hansson@arm.com 1639241Sandreas.hansson@arm.com UNSERIALIZE_SCALAR(nextTransitionTick); 1649719Sandreas.hansson@arm.com 1659719Sandreas.hansson@arm.com UNSERIALIZE_SCALAR(nextPacketTick); 1669719Sandreas.hansson@arm.com 1679719Sandreas.hansson@arm.com // @todo In the case of a stateful generator state such as the 1689719Sandreas.hansson@arm.com // trace player we would also have to restore the position in the 1699720Sandreas.hansson@arm.com // trace playback and the tick offset 1709719Sandreas.hansson@arm.com UNSERIALIZE_SCALAR(currState); 1719241Sandreas.hansson@arm.com} 1729241Sandreas.hansson@arm.com 1739241Sandreas.hansson@arm.comvoid 1749717Sandreas.hansson@arm.comTrafficGen::update() 1759241Sandreas.hansson@arm.com{ 1769717Sandreas.hansson@arm.com // if we have reached the time for the next state transition, then 1779717Sandreas.hansson@arm.com // perform the transition 1789717Sandreas.hansson@arm.com if (curTick() >= nextTransitionTick) { 1799717Sandreas.hansson@arm.com transition(); 1809717Sandreas.hansson@arm.com } else { 1819719Sandreas.hansson@arm.com assert(curTick() >= nextPacketTick); 1829719Sandreas.hansson@arm.com // get the next packet and try to send it 1839718Sandreas.hansson@arm.com PacketPtr pkt = states[currState]->getNextPacket(); 1849719Sandreas.hansson@arm.com numPackets++; 1859719Sandreas.hansson@arm.com if (!port.sendTimingReq(pkt)) { 1869719Sandreas.hansson@arm.com retryPkt = pkt; 1879719Sandreas.hansson@arm.com retryPktTick = curTick(); 1889719Sandreas.hansson@arm.com } 1899719Sandreas.hansson@arm.com } 1909719Sandreas.hansson@arm.com 1919719Sandreas.hansson@arm.com // if we are waiting for a retry, do not schedule any further 1929719Sandreas.hansson@arm.com // events, in the case of a transition or a successful send, go 1939719Sandreas.hansson@arm.com // ahead and determine when the next update should take place 1949719Sandreas.hansson@arm.com if (retryPkt == NULL) { 1959719Sandreas.hansson@arm.com // schedule next update event based on either the next execute 1969719Sandreas.hansson@arm.com // tick or the next transition, which ever comes first 1979720Sandreas.hansson@arm.com nextPacketTick = states[currState]->nextPacketTick(elasticReq, 0); 1989719Sandreas.hansson@arm.com Tick nextEventTick = std::min(nextPacketTick, nextTransitionTick); 1999719Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Next event scheduled at %lld\n", nextEventTick); 2009719Sandreas.hansson@arm.com schedule(updateEvent, nextEventTick); 2019717Sandreas.hansson@arm.com } 2029241Sandreas.hansson@arm.com} 2039241Sandreas.hansson@arm.com 2049241Sandreas.hansson@arm.comvoid 2059718Sandreas.hansson@arm.comTrafficGen::parseConfig() 2069241Sandreas.hansson@arm.com{ 2079241Sandreas.hansson@arm.com // keep track of the transitions parsed to create the matrix when 2089241Sandreas.hansson@arm.com // done 2099241Sandreas.hansson@arm.com vector<Transition> transitions; 2109241Sandreas.hansson@arm.com 2119241Sandreas.hansson@arm.com // open input file 2129241Sandreas.hansson@arm.com ifstream infile; 2139718Sandreas.hansson@arm.com infile.open(configFile.c_str(), ifstream::in); 2149241Sandreas.hansson@arm.com if (!infile.is_open()) { 2159241Sandreas.hansson@arm.com fatal("Traffic generator %s config file not found at %s\n", 2169718Sandreas.hansson@arm.com name(), configFile); 2179241Sandreas.hansson@arm.com } 2189241Sandreas.hansson@arm.com 2199241Sandreas.hansson@arm.com // read line by line and determine the action based on the first 2209241Sandreas.hansson@arm.com // keyword 2219241Sandreas.hansson@arm.com string keyword; 2229241Sandreas.hansson@arm.com string line; 2239241Sandreas.hansson@arm.com 2249241Sandreas.hansson@arm.com while (getline(infile, line).good()) { 2259241Sandreas.hansson@arm.com // see if this line is a comment line, and if so skip it 2269241Sandreas.hansson@arm.com if (line.find('#') != 1) { 2279241Sandreas.hansson@arm.com // create an input stream for the tokenization 2289241Sandreas.hansson@arm.com istringstream is(line); 2299241Sandreas.hansson@arm.com 2309241Sandreas.hansson@arm.com // determine the keyword 2319241Sandreas.hansson@arm.com is >> keyword; 2329241Sandreas.hansson@arm.com 2339241Sandreas.hansson@arm.com if (keyword == "STATE") { 2349241Sandreas.hansson@arm.com // parse the behaviour of this state 2359241Sandreas.hansson@arm.com uint32_t id; 2369241Sandreas.hansson@arm.com Tick duration; 2379241Sandreas.hansson@arm.com string mode; 2389241Sandreas.hansson@arm.com 2399241Sandreas.hansson@arm.com is >> id >> duration >> mode; 2409241Sandreas.hansson@arm.com 2419241Sandreas.hansson@arm.com if (mode == "TRACE") { 2429241Sandreas.hansson@arm.com string traceFile; 2439241Sandreas.hansson@arm.com Addr addrOffset; 2449241Sandreas.hansson@arm.com 2459241Sandreas.hansson@arm.com is >> traceFile >> addrOffset; 2469241Sandreas.hansson@arm.com 2479718Sandreas.hansson@arm.com states[id] = new TraceGen(name(), masterID, duration, 2489241Sandreas.hansson@arm.com traceFile, addrOffset); 2499241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "State: %d TraceGen\n", id); 2509241Sandreas.hansson@arm.com } else if (mode == "IDLE") { 2519718Sandreas.hansson@arm.com states[id] = new IdleGen(name(), masterID, duration); 2529241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "State: %d IdleGen\n", id); 2539241Sandreas.hansson@arm.com } else if (mode == "LINEAR" || mode == "RANDOM") { 2549241Sandreas.hansson@arm.com uint32_t read_percent; 2559241Sandreas.hansson@arm.com Addr start_addr; 2569241Sandreas.hansson@arm.com Addr end_addr; 2579241Sandreas.hansson@arm.com Addr blocksize; 2589241Sandreas.hansson@arm.com Tick min_period; 2599241Sandreas.hansson@arm.com Tick max_period; 2609241Sandreas.hansson@arm.com Addr data_limit; 2619241Sandreas.hansson@arm.com 2629241Sandreas.hansson@arm.com is >> read_percent >> start_addr >> end_addr >> 2639241Sandreas.hansson@arm.com blocksize >> min_period >> max_period >> data_limit; 2649241Sandreas.hansson@arm.com 2659241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "%s, addr %x to %x, size %d," 2669241Sandreas.hansson@arm.com " period %d to %d, %d%% reads\n", 2679241Sandreas.hansson@arm.com mode, start_addr, end_addr, blocksize, min_period, 2689241Sandreas.hansson@arm.com max_period, read_percent); 2699241Sandreas.hansson@arm.com 2709718Sandreas.hansson@arm.com 2719718Sandreas.hansson@arm.com if (port.deviceBlockSize() && 2729718Sandreas.hansson@arm.com blocksize > port.deviceBlockSize()) 2739718Sandreas.hansson@arm.com fatal("TrafficGen %s block size (%d) is larger than " 2749718Sandreas.hansson@arm.com "port block size (%d)\n", name(), 2759718Sandreas.hansson@arm.com blocksize, port.deviceBlockSize()); 2769718Sandreas.hansson@arm.com 2779241Sandreas.hansson@arm.com if (read_percent > 100) 2789718Sandreas.hansson@arm.com fatal("%s cannot have more than 100% reads", name()); 2799241Sandreas.hansson@arm.com 2809241Sandreas.hansson@arm.com if (mode == "LINEAR") { 2819718Sandreas.hansson@arm.com states[id] = new LinearGen(name(), masterID, 2829241Sandreas.hansson@arm.com duration, start_addr, 2839241Sandreas.hansson@arm.com end_addr, blocksize, 2849241Sandreas.hansson@arm.com min_period, max_period, 2859241Sandreas.hansson@arm.com read_percent, data_limit); 2869241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "State: %d LinearGen\n", id); 2879241Sandreas.hansson@arm.com } else if (mode == "RANDOM") { 2889718Sandreas.hansson@arm.com states[id] = new RandomGen(name(), masterID, 2899241Sandreas.hansson@arm.com duration, start_addr, 2909241Sandreas.hansson@arm.com end_addr, blocksize, 2919241Sandreas.hansson@arm.com min_period, max_period, 2929241Sandreas.hansson@arm.com read_percent, data_limit); 2939241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "State: %d RandomGen\n", id); 2949241Sandreas.hansson@arm.com } 2959241Sandreas.hansson@arm.com } else { 2969241Sandreas.hansson@arm.com fatal("%s: Unknown traffic generator mode: %s", 2979241Sandreas.hansson@arm.com name(), mode); 2989241Sandreas.hansson@arm.com } 2999241Sandreas.hansson@arm.com } else if (keyword == "TRANSITION") { 3009241Sandreas.hansson@arm.com Transition transition; 3019241Sandreas.hansson@arm.com 3029241Sandreas.hansson@arm.com is >> transition.from >> transition.to >> transition.p; 3039241Sandreas.hansson@arm.com 3049241Sandreas.hansson@arm.com transitions.push_back(transition); 3059241Sandreas.hansson@arm.com 3069241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Transition: %d -> %d\n", transition.from, 3079241Sandreas.hansson@arm.com transition.to); 3089241Sandreas.hansson@arm.com } else if (keyword == "INIT") { 3099241Sandreas.hansson@arm.com // set the initial state as the active state 3109241Sandreas.hansson@arm.com is >> currState; 3119241Sandreas.hansson@arm.com 3129241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Initial state: %d\n", currState); 3139241Sandreas.hansson@arm.com } 3149241Sandreas.hansson@arm.com } 3159241Sandreas.hansson@arm.com } 3169241Sandreas.hansson@arm.com 3179241Sandreas.hansson@arm.com // resize and populate state transition matrix 3189721Ssascha.bischoff@arm.com transitionMatrix.resize(states.size()); 3199721Ssascha.bischoff@arm.com for (size_t i = 0; i < states.size(); i++) { 3209721Ssascha.bischoff@arm.com transitionMatrix[i].resize(states.size()); 3219241Sandreas.hansson@arm.com } 3229241Sandreas.hansson@arm.com 3239241Sandreas.hansson@arm.com for (vector<Transition>::iterator t = transitions.begin(); 3249241Sandreas.hansson@arm.com t != transitions.end(); ++t) { 3259241Sandreas.hansson@arm.com transitionMatrix[t->from][t->to] = t->p; 3269241Sandreas.hansson@arm.com } 3279241Sandreas.hansson@arm.com 3289241Sandreas.hansson@arm.com // ensure the egress edges do not have a probability larger than 3299241Sandreas.hansson@arm.com // one 3309721Ssascha.bischoff@arm.com for (size_t i = 0; i < states.size(); i++) { 3319241Sandreas.hansson@arm.com double sum = 0; 3329721Ssascha.bischoff@arm.com for (size_t j = 0; j < states.size(); j++) { 3339241Sandreas.hansson@arm.com sum += transitionMatrix[i][j]; 3349241Sandreas.hansson@arm.com } 3359241Sandreas.hansson@arm.com 3369241Sandreas.hansson@arm.com // avoid comparing floating point numbers 3379241Sandreas.hansson@arm.com if (abs(sum - 1.0) > 0.001) 3389241Sandreas.hansson@arm.com fatal("%s has transition probability != 1 for state %d\n", 3399241Sandreas.hansson@arm.com name(), i); 3409241Sandreas.hansson@arm.com } 3419241Sandreas.hansson@arm.com 3429241Sandreas.hansson@arm.com // close input file 3439241Sandreas.hansson@arm.com infile.close(); 3449241Sandreas.hansson@arm.com} 3459241Sandreas.hansson@arm.com 3469241Sandreas.hansson@arm.comvoid 3479717Sandreas.hansson@arm.comTrafficGen::transition() 3489241Sandreas.hansson@arm.com{ 3499241Sandreas.hansson@arm.com // exit the current state 3509241Sandreas.hansson@arm.com states[currState]->exit(); 3519241Sandreas.hansson@arm.com 3529241Sandreas.hansson@arm.com // determine next state 3539241Sandreas.hansson@arm.com double p = random_mt.gen_real1(); 3549241Sandreas.hansson@arm.com assert(currState < transitionMatrix.size()); 3559584Sandreas@sandberg.pp.se double cumulative = 0.0; 3569584Sandreas@sandberg.pp.se size_t i = 0; 3579584Sandreas@sandberg.pp.se do { 3589241Sandreas.hansson@arm.com cumulative += transitionMatrix[currState][i]; 3599241Sandreas.hansson@arm.com ++i; 3609584Sandreas@sandberg.pp.se } while (cumulative < p && i < transitionMatrix[currState].size()); 3619584Sandreas@sandberg.pp.se 3629584Sandreas@sandberg.pp.se enterState(i - 1); 3639241Sandreas.hansson@arm.com} 3649241Sandreas.hansson@arm.com 3659241Sandreas.hansson@arm.comvoid 3669717Sandreas.hansson@arm.comTrafficGen::enterState(uint32_t newState) 3679241Sandreas.hansson@arm.com{ 3689241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Transition to state %d\n", newState); 3699241Sandreas.hansson@arm.com 3709241Sandreas.hansson@arm.com currState = newState; 3719719Sandreas.hansson@arm.com // we could have been delayed and not transitioned on the exact 3729719Sandreas.hansson@arm.com // tick when we were supposed to (due to back pressure when 3739719Sandreas.hansson@arm.com // sending a packet) 3749719Sandreas.hansson@arm.com nextTransitionTick = curTick() + states[currState]->duration; 3759241Sandreas.hansson@arm.com states[currState]->enter(); 3769241Sandreas.hansson@arm.com} 3779241Sandreas.hansson@arm.com 3789719Sandreas.hansson@arm.comvoid 3799719Sandreas.hansson@arm.comTrafficGen::recvRetry() 3809719Sandreas.hansson@arm.com{ 3819719Sandreas.hansson@arm.com assert(retryPkt != NULL); 3829719Sandreas.hansson@arm.com 3839719Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Received retry\n"); 3849719Sandreas.hansson@arm.com numRetries++; 3859719Sandreas.hansson@arm.com // attempt to send the packet, and if we are successful start up 3869719Sandreas.hansson@arm.com // the machinery again 3879719Sandreas.hansson@arm.com if (port.sendTimingReq(retryPkt)) { 3889719Sandreas.hansson@arm.com retryPkt = NULL; 3899719Sandreas.hansson@arm.com // remember how much delay was incurred due to back-pressure 3909720Sandreas.hansson@arm.com // when sending the request, we also use this to derive 3919720Sandreas.hansson@arm.com // the tick for the next packet 3929719Sandreas.hansson@arm.com Tick delay = curTick() - retryPktTick; 3939719Sandreas.hansson@arm.com retryPktTick = 0; 3949719Sandreas.hansson@arm.com retryTicks += delay; 3959719Sandreas.hansson@arm.com 3969719Sandreas.hansson@arm.com if (drainManager == NULL) { 3979719Sandreas.hansson@arm.com // packet is sent, so find out when the next one is due 3989720Sandreas.hansson@arm.com nextPacketTick = states[currState]->nextPacketTick(elasticReq, 3999720Sandreas.hansson@arm.com delay); 4009719Sandreas.hansson@arm.com Tick nextEventTick = std::min(nextPacketTick, nextTransitionTick); 4019719Sandreas.hansson@arm.com schedule(updateEvent, std::max(curTick(), nextEventTick)); 4029719Sandreas.hansson@arm.com } else { 4039719Sandreas.hansson@arm.com // shut things down 4049719Sandreas.hansson@arm.com nextPacketTick = MaxTick; 4059719Sandreas.hansson@arm.com nextTransitionTick = MaxTick; 4069719Sandreas.hansson@arm.com drainManager->signalDrainDone(); 4079719Sandreas.hansson@arm.com // Clear the drain event once we're done with it. 4089719Sandreas.hansson@arm.com drainManager = NULL; 4099719Sandreas.hansson@arm.com } 4109719Sandreas.hansson@arm.com } 4119719Sandreas.hansson@arm.com} 4129719Sandreas.hansson@arm.com 4139719Sandreas.hansson@arm.comvoid 4149719Sandreas.hansson@arm.comTrafficGen::regStats() 4159719Sandreas.hansson@arm.com{ 4169719Sandreas.hansson@arm.com // Initialise all the stats 4179719Sandreas.hansson@arm.com using namespace Stats; 4189719Sandreas.hansson@arm.com 4199719Sandreas.hansson@arm.com numPackets 4209719Sandreas.hansson@arm.com .name(name() + ".numPackets") 4219719Sandreas.hansson@arm.com .desc("Number of packets generated"); 4229719Sandreas.hansson@arm.com 4239719Sandreas.hansson@arm.com numRetries 4249719Sandreas.hansson@arm.com .name(name() + ".numRetries") 4259719Sandreas.hansson@arm.com .desc("Number of retries"); 4269719Sandreas.hansson@arm.com 4279719Sandreas.hansson@arm.com retryTicks 4289719Sandreas.hansson@arm.com .name(name() + ".retryTicks") 4299719Sandreas.hansson@arm.com .desc("Time spent waiting due to back-pressure (ticks)"); 4309719Sandreas.hansson@arm.com} 4319719Sandreas.hansson@arm.com 4329241Sandreas.hansson@arm.combool 4339241Sandreas.hansson@arm.comTrafficGen::TrafficGenPort::recvTimingResp(PacketPtr pkt) 4349241Sandreas.hansson@arm.com{ 4359241Sandreas.hansson@arm.com delete pkt->req; 4369241Sandreas.hansson@arm.com delete pkt; 4379241Sandreas.hansson@arm.com 4389241Sandreas.hansson@arm.com return true; 4399241Sandreas.hansson@arm.com} 440