traffic_gen.cc revision 10360
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 4410138Sneha.agarwal@arm.com#include "base/intmath.hh" 459241Sandreas.hansson@arm.com#include "base/random.hh" 469241Sandreas.hansson@arm.com#include "cpu/testers/traffic_gen/traffic_gen.hh" 479241Sandreas.hansson@arm.com#include "debug/Checkpoint.hh" 489241Sandreas.hansson@arm.com#include "debug/TrafficGen.hh" 499241Sandreas.hansson@arm.com#include "sim/stats.hh" 509241Sandreas.hansson@arm.com#include "sim/system.hh" 519241Sandreas.hansson@arm.com 529241Sandreas.hansson@arm.comusing namespace std; 539241Sandreas.hansson@arm.com 549241Sandreas.hansson@arm.comTrafficGen::TrafficGen(const TrafficGenParams* p) 559241Sandreas.hansson@arm.com : MemObject(p), 569241Sandreas.hansson@arm.com system(p->system), 579241Sandreas.hansson@arm.com masterID(system->getMasterId(name())), 589718Sandreas.hansson@arm.com configFile(p->config_file), 599720Sandreas.hansson@arm.com elasticReq(p->elastic_req), 609717Sandreas.hansson@arm.com nextTransitionTick(0), 619719Sandreas.hansson@arm.com nextPacketTick(0), 6210360Sandreas.hansson@arm.com currState(0), 639241Sandreas.hansson@arm.com port(name() + ".port", *this), 649719Sandreas.hansson@arm.com retryPkt(NULL), 659719Sandreas.hansson@arm.com retryPktTick(0), 669719Sandreas.hansson@arm.com updateEvent(this), 679719Sandreas.hansson@arm.com drainManager(NULL) 689241Sandreas.hansson@arm.com{ 699241Sandreas.hansson@arm.com} 709241Sandreas.hansson@arm.com 719241Sandreas.hansson@arm.comTrafficGen* 729241Sandreas.hansson@arm.comTrafficGenParams::create() 739241Sandreas.hansson@arm.com{ 749241Sandreas.hansson@arm.com return new TrafficGen(this); 759241Sandreas.hansson@arm.com} 769241Sandreas.hansson@arm.com 779294Sandreas.hansson@arm.comBaseMasterPort& 789294Sandreas.hansson@arm.comTrafficGen::getMasterPort(const string& if_name, PortID idx) 799241Sandreas.hansson@arm.com{ 809241Sandreas.hansson@arm.com if (if_name == "port") { 819241Sandreas.hansson@arm.com return port; 829241Sandreas.hansson@arm.com } else { 839241Sandreas.hansson@arm.com return MemObject::getMasterPort(if_name, idx); 849241Sandreas.hansson@arm.com } 859241Sandreas.hansson@arm.com} 869241Sandreas.hansson@arm.com 879241Sandreas.hansson@arm.comvoid 889241Sandreas.hansson@arm.comTrafficGen::init() 899241Sandreas.hansson@arm.com{ 909241Sandreas.hansson@arm.com if (!port.isConnected()) 919241Sandreas.hansson@arm.com fatal("The port of %s is not connected!\n", name()); 929241Sandreas.hansson@arm.com 939241Sandreas.hansson@arm.com // if the system is in timing mode active the request generator 949524SAndreas.Sandberg@ARM.com if (system->isTimingMode()) { 959241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Timing mode, activating request generator\n"); 969241Sandreas.hansson@arm.com 979718Sandreas.hansson@arm.com parseConfig(); 989718Sandreas.hansson@arm.com 999241Sandreas.hansson@arm.com // enter initial state 1009717Sandreas.hansson@arm.com enterState(currState); 1019241Sandreas.hansson@arm.com } else { 1029241Sandreas.hansson@arm.com DPRINTF(TrafficGen, 1039241Sandreas.hansson@arm.com "Traffic generator is only active in timing mode\n"); 1049241Sandreas.hansson@arm.com } 1059241Sandreas.hansson@arm.com} 1069241Sandreas.hansson@arm.com 1079241Sandreas.hansson@arm.comvoid 1089241Sandreas.hansson@arm.comTrafficGen::initState() 1099241Sandreas.hansson@arm.com{ 1109241Sandreas.hansson@arm.com // when not restoring from a checkpoint, make sure we kick things off 1119524SAndreas.Sandberg@ARM.com if (system->isTimingMode()) { 1129719Sandreas.hansson@arm.com // call nextPacketTick on the state to advance it 1139720Sandreas.hansson@arm.com nextPacketTick = states[currState]->nextPacketTick(elasticReq, 0); 1149719Sandreas.hansson@arm.com schedule(updateEvent, std::min(nextPacketTick, nextTransitionTick)); 1159241Sandreas.hansson@arm.com } else { 1169241Sandreas.hansson@arm.com DPRINTF(TrafficGen, 1179241Sandreas.hansson@arm.com "Traffic generator is only active in timing mode\n"); 1189241Sandreas.hansson@arm.com } 1199241Sandreas.hansson@arm.com} 1209241Sandreas.hansson@arm.com 1219241Sandreas.hansson@arm.comunsigned int 1229342SAndreas.Sandberg@arm.comTrafficGen::drain(DrainManager *dm) 1239241Sandreas.hansson@arm.com{ 12410051Srioshering@gmail.com if (!updateEvent.scheduled()) { 12510051Srioshering@gmail.com // no event has been scheduled yet (e.g. switched from atomic mode) 12610051Srioshering@gmail.com return 0; 12710051Srioshering@gmail.com } 12810051Srioshering@gmail.com 1299719Sandreas.hansson@arm.com if (retryPkt == NULL) { 1309719Sandreas.hansson@arm.com // shut things down 1319719Sandreas.hansson@arm.com nextPacketTick = MaxTick; 1329719Sandreas.hansson@arm.com nextTransitionTick = MaxTick; 1339719Sandreas.hansson@arm.com deschedule(updateEvent); 1349719Sandreas.hansson@arm.com return 0; 1359719Sandreas.hansson@arm.com } else { 1369719Sandreas.hansson@arm.com drainManager = dm; 1379719Sandreas.hansson@arm.com return 1; 1389719Sandreas.hansson@arm.com } 1399241Sandreas.hansson@arm.com} 1409241Sandreas.hansson@arm.com 1419241Sandreas.hansson@arm.comvoid 1429241Sandreas.hansson@arm.comTrafficGen::serialize(ostream &os) 1439241Sandreas.hansson@arm.com{ 1449241Sandreas.hansson@arm.com DPRINTF(Checkpoint, "Serializing TrafficGen\n"); 1459241Sandreas.hansson@arm.com 1469241Sandreas.hansson@arm.com // save ticks of the graph event if it is scheduled 1479719Sandreas.hansson@arm.com Tick nextEvent = updateEvent.scheduled() ? updateEvent.when() : 0; 1489241Sandreas.hansson@arm.com 1499719Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Saving nextEvent=%llu\n", nextEvent); 1509241Sandreas.hansson@arm.com 1519717Sandreas.hansson@arm.com SERIALIZE_SCALAR(nextEvent); 1529241Sandreas.hansson@arm.com 1539241Sandreas.hansson@arm.com SERIALIZE_SCALAR(nextTransitionTick); 1549241Sandreas.hansson@arm.com 1559719Sandreas.hansson@arm.com SERIALIZE_SCALAR(nextPacketTick); 1569719Sandreas.hansson@arm.com 1579719Sandreas.hansson@arm.com SERIALIZE_SCALAR(currState); 1589241Sandreas.hansson@arm.com} 1599241Sandreas.hansson@arm.com 1609241Sandreas.hansson@arm.comvoid 1619241Sandreas.hansson@arm.comTrafficGen::unserialize(Checkpoint* cp, const string& section) 1629241Sandreas.hansson@arm.com{ 1639241Sandreas.hansson@arm.com // restore scheduled events 1649717Sandreas.hansson@arm.com Tick nextEvent; 1659717Sandreas.hansson@arm.com UNSERIALIZE_SCALAR(nextEvent); 1669717Sandreas.hansson@arm.com if (nextEvent != 0) { 1679717Sandreas.hansson@arm.com schedule(updateEvent, nextEvent); 1689241Sandreas.hansson@arm.com } 1699241Sandreas.hansson@arm.com 1709241Sandreas.hansson@arm.com UNSERIALIZE_SCALAR(nextTransitionTick); 1719719Sandreas.hansson@arm.com 1729719Sandreas.hansson@arm.com UNSERIALIZE_SCALAR(nextPacketTick); 1739719Sandreas.hansson@arm.com 1749719Sandreas.hansson@arm.com // @todo In the case of a stateful generator state such as the 1759719Sandreas.hansson@arm.com // trace player we would also have to restore the position in the 1769720Sandreas.hansson@arm.com // trace playback and the tick offset 1779719Sandreas.hansson@arm.com UNSERIALIZE_SCALAR(currState); 1789241Sandreas.hansson@arm.com} 1799241Sandreas.hansson@arm.com 1809241Sandreas.hansson@arm.comvoid 1819717Sandreas.hansson@arm.comTrafficGen::update() 1829241Sandreas.hansson@arm.com{ 1839717Sandreas.hansson@arm.com // if we have reached the time for the next state transition, then 1849717Sandreas.hansson@arm.com // perform the transition 1859717Sandreas.hansson@arm.com if (curTick() >= nextTransitionTick) { 1869717Sandreas.hansson@arm.com transition(); 1879717Sandreas.hansson@arm.com } else { 1889719Sandreas.hansson@arm.com assert(curTick() >= nextPacketTick); 1899719Sandreas.hansson@arm.com // get the next packet and try to send it 1909718Sandreas.hansson@arm.com PacketPtr pkt = states[currState]->getNextPacket(); 19110266Sandreas.hansson@arm.com 19210266Sandreas.hansson@arm.com // suppress packets that are not destined for a memory, such as 19310266Sandreas.hansson@arm.com // device accesses that could be part of a trace 19410266Sandreas.hansson@arm.com if (system->isMemAddr(pkt->getAddr())) { 19510266Sandreas.hansson@arm.com numPackets++; 19610266Sandreas.hansson@arm.com if (!port.sendTimingReq(pkt)) { 19710266Sandreas.hansson@arm.com retryPkt = pkt; 19810266Sandreas.hansson@arm.com retryPktTick = curTick(); 19910266Sandreas.hansson@arm.com } 20010266Sandreas.hansson@arm.com } else { 20110266Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Suppressed packet %s 0x%x\n", 20210266Sandreas.hansson@arm.com pkt->cmdString(), pkt->getAddr()); 2039719Sandreas.hansson@arm.com } 2049719Sandreas.hansson@arm.com } 2059719Sandreas.hansson@arm.com 2069719Sandreas.hansson@arm.com // if we are waiting for a retry, do not schedule any further 2079719Sandreas.hansson@arm.com // events, in the case of a transition or a successful send, go 2089719Sandreas.hansson@arm.com // ahead and determine when the next update should take place 2099719Sandreas.hansson@arm.com if (retryPkt == NULL) { 2109719Sandreas.hansson@arm.com // schedule next update event based on either the next execute 2119719Sandreas.hansson@arm.com // tick or the next transition, which ever comes first 2129720Sandreas.hansson@arm.com nextPacketTick = states[currState]->nextPacketTick(elasticReq, 0); 2139719Sandreas.hansson@arm.com Tick nextEventTick = std::min(nextPacketTick, nextTransitionTick); 2149719Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Next event scheduled at %lld\n", nextEventTick); 2159719Sandreas.hansson@arm.com schedule(updateEvent, nextEventTick); 2169717Sandreas.hansson@arm.com } 2179241Sandreas.hansson@arm.com} 2189241Sandreas.hansson@arm.com 2199241Sandreas.hansson@arm.comvoid 2209718Sandreas.hansson@arm.comTrafficGen::parseConfig() 2219241Sandreas.hansson@arm.com{ 2229241Sandreas.hansson@arm.com // keep track of the transitions parsed to create the matrix when 2239241Sandreas.hansson@arm.com // done 2249241Sandreas.hansson@arm.com vector<Transition> transitions; 2259241Sandreas.hansson@arm.com 2269241Sandreas.hansson@arm.com // open input file 2279241Sandreas.hansson@arm.com ifstream infile; 2289718Sandreas.hansson@arm.com infile.open(configFile.c_str(), ifstream::in); 2299241Sandreas.hansson@arm.com if (!infile.is_open()) { 2309241Sandreas.hansson@arm.com fatal("Traffic generator %s config file not found at %s\n", 2319718Sandreas.hansson@arm.com name(), configFile); 2329241Sandreas.hansson@arm.com } 2339241Sandreas.hansson@arm.com 23410128Sstan.czerniawski@arm.com bool init_state_set = false; 23510128Sstan.czerniawski@arm.com 2369241Sandreas.hansson@arm.com // read line by line and determine the action based on the first 2379241Sandreas.hansson@arm.com // keyword 2389241Sandreas.hansson@arm.com string keyword; 2399241Sandreas.hansson@arm.com string line; 2409241Sandreas.hansson@arm.com 2419241Sandreas.hansson@arm.com while (getline(infile, line).good()) { 2429241Sandreas.hansson@arm.com // see if this line is a comment line, and if so skip it 2439241Sandreas.hansson@arm.com if (line.find('#') != 1) { 2449241Sandreas.hansson@arm.com // create an input stream for the tokenization 2459241Sandreas.hansson@arm.com istringstream is(line); 2469241Sandreas.hansson@arm.com 2479241Sandreas.hansson@arm.com // determine the keyword 2489241Sandreas.hansson@arm.com is >> keyword; 2499241Sandreas.hansson@arm.com 2509241Sandreas.hansson@arm.com if (keyword == "STATE") { 2519241Sandreas.hansson@arm.com // parse the behaviour of this state 2529241Sandreas.hansson@arm.com uint32_t id; 2539241Sandreas.hansson@arm.com Tick duration; 2549241Sandreas.hansson@arm.com string mode; 2559241Sandreas.hansson@arm.com 2569241Sandreas.hansson@arm.com is >> id >> duration >> mode; 2579241Sandreas.hansson@arm.com 2589241Sandreas.hansson@arm.com if (mode == "TRACE") { 2599241Sandreas.hansson@arm.com string traceFile; 2609241Sandreas.hansson@arm.com Addr addrOffset; 2619241Sandreas.hansson@arm.com 2629241Sandreas.hansson@arm.com is >> traceFile >> addrOffset; 2639241Sandreas.hansson@arm.com 2649718Sandreas.hansson@arm.com states[id] = new TraceGen(name(), masterID, duration, 2659241Sandreas.hansson@arm.com traceFile, addrOffset); 2669241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "State: %d TraceGen\n", id); 2679241Sandreas.hansson@arm.com } else if (mode == "IDLE") { 2689718Sandreas.hansson@arm.com states[id] = new IdleGen(name(), masterID, duration); 2699241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "State: %d IdleGen\n", id); 27010138Sneha.agarwal@arm.com } else if (mode == "LINEAR" || mode == "RANDOM" || 27110138Sneha.agarwal@arm.com mode == "DRAM") { 2729241Sandreas.hansson@arm.com uint32_t read_percent; 2739241Sandreas.hansson@arm.com Addr start_addr; 2749241Sandreas.hansson@arm.com Addr end_addr; 2759241Sandreas.hansson@arm.com Addr blocksize; 2769241Sandreas.hansson@arm.com Tick min_period; 2779241Sandreas.hansson@arm.com Tick max_period; 2789241Sandreas.hansson@arm.com Addr data_limit; 2799241Sandreas.hansson@arm.com 2809241Sandreas.hansson@arm.com is >> read_percent >> start_addr >> end_addr >> 2819241Sandreas.hansson@arm.com blocksize >> min_period >> max_period >> data_limit; 2829241Sandreas.hansson@arm.com 2839241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "%s, addr %x to %x, size %d," 2849241Sandreas.hansson@arm.com " period %d to %d, %d%% reads\n", 2859241Sandreas.hansson@arm.com mode, start_addr, end_addr, blocksize, min_period, 2869241Sandreas.hansson@arm.com max_period, read_percent); 2879241Sandreas.hansson@arm.com 2889718Sandreas.hansson@arm.com 2899814Sandreas.hansson@arm.com if (blocksize > system->cacheLineSize()) 2909718Sandreas.hansson@arm.com fatal("TrafficGen %s block size (%d) is larger than " 29110138Sneha.agarwal@arm.com "cache line size (%d)\n", name(), 2929814Sandreas.hansson@arm.com blocksize, system->cacheLineSize()); 2939718Sandreas.hansson@arm.com 2949241Sandreas.hansson@arm.com if (read_percent > 100) 2959718Sandreas.hansson@arm.com fatal("%s cannot have more than 100% reads", name()); 2969241Sandreas.hansson@arm.com 2979722Ssascha.bischoff@arm.com if (min_period > max_period) 2989722Ssascha.bischoff@arm.com fatal("%s cannot have min_period > max_period", name()); 2999722Ssascha.bischoff@arm.com 3009241Sandreas.hansson@arm.com if (mode == "LINEAR") { 3019718Sandreas.hansson@arm.com states[id] = new LinearGen(name(), masterID, 3029241Sandreas.hansson@arm.com duration, start_addr, 3039241Sandreas.hansson@arm.com end_addr, blocksize, 3049241Sandreas.hansson@arm.com min_period, max_period, 3059241Sandreas.hansson@arm.com read_percent, data_limit); 3069241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "State: %d LinearGen\n", id); 3079241Sandreas.hansson@arm.com } else if (mode == "RANDOM") { 3089718Sandreas.hansson@arm.com states[id] = new RandomGen(name(), masterID, 3099241Sandreas.hansson@arm.com duration, start_addr, 3109241Sandreas.hansson@arm.com end_addr, blocksize, 3119241Sandreas.hansson@arm.com min_period, max_period, 3129241Sandreas.hansson@arm.com read_percent, data_limit); 3139241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "State: %d RandomGen\n", id); 31410138Sneha.agarwal@arm.com } else if (mode == "DRAM") { 31510138Sneha.agarwal@arm.com // stride size (bytes) of the request for achieving 31610138Sneha.agarwal@arm.com // required hit length 31710138Sneha.agarwal@arm.com unsigned int stride_size; 31810138Sneha.agarwal@arm.com unsigned int page_size; 31910138Sneha.agarwal@arm.com unsigned int nbr_of_banks_DRAM; 32010138Sneha.agarwal@arm.com unsigned int nbr_of_banks_util; 32110138Sneha.agarwal@arm.com unsigned int addr_mapping; 32210138Sneha.agarwal@arm.com 32310138Sneha.agarwal@arm.com is >> stride_size >> page_size >> nbr_of_banks_DRAM >> 32410138Sneha.agarwal@arm.com nbr_of_banks_util >> addr_mapping; 32510138Sneha.agarwal@arm.com 32610138Sneha.agarwal@arm.com if (stride_size > page_size) 32710138Sneha.agarwal@arm.com warn("DRAM generator stride size (%d) is greater " 32810138Sneha.agarwal@arm.com "than page size (%d) of the memory\n", 32910138Sneha.agarwal@arm.com blocksize, page_size); 33010138Sneha.agarwal@arm.com 33110138Sneha.agarwal@arm.com if (nbr_of_banks_util > nbr_of_banks_DRAM) 33210138Sneha.agarwal@arm.com fatal("Attempting to use more banks (%) than " 33310138Sneha.agarwal@arm.com "what is available (%)\n", 33410138Sneha.agarwal@arm.com nbr_of_banks_util, nbr_of_banks_DRAM); 33510138Sneha.agarwal@arm.com 33610138Sneha.agarwal@arm.com if (nbr_of_banks_util > nbr_of_banks_DRAM) 33710138Sneha.agarwal@arm.com fatal("Attempting to use more banks (%) than " 33810138Sneha.agarwal@arm.com "what is available (%)\n", 33910138Sneha.agarwal@arm.com nbr_of_banks_util, nbr_of_banks_DRAM); 34010138Sneha.agarwal@arm.com 34110138Sneha.agarwal@arm.com // count the number of sequential packets to 34210138Sneha.agarwal@arm.com // generate 34310138Sneha.agarwal@arm.com unsigned int num_seq_pkts = 1; 34410138Sneha.agarwal@arm.com 34510138Sneha.agarwal@arm.com if (stride_size > blocksize) { 34610138Sneha.agarwal@arm.com num_seq_pkts = divCeil(stride_size, blocksize); 34710138Sneha.agarwal@arm.com DPRINTF(TrafficGen, "stride size: %d " 34810138Sneha.agarwal@arm.com "block size: %d, num_seq_pkts: %d\n", 34910138Sneha.agarwal@arm.com stride_size, blocksize, num_seq_pkts); 35010138Sneha.agarwal@arm.com } 35110138Sneha.agarwal@arm.com 35210138Sneha.agarwal@arm.com states[id] = new DramGen(name(), masterID, 35310138Sneha.agarwal@arm.com duration, start_addr, 35410138Sneha.agarwal@arm.com end_addr, blocksize, 35510138Sneha.agarwal@arm.com min_period, max_period, 35610138Sneha.agarwal@arm.com read_percent, data_limit, 35710138Sneha.agarwal@arm.com num_seq_pkts, page_size, 35810138Sneha.agarwal@arm.com nbr_of_banks_DRAM, 35910138Sneha.agarwal@arm.com nbr_of_banks_util, 36010138Sneha.agarwal@arm.com addr_mapping); 36110138Sneha.agarwal@arm.com DPRINTF(TrafficGen, "State: %d DramGen\n", id); 3629241Sandreas.hansson@arm.com } 3639241Sandreas.hansson@arm.com } else { 3649241Sandreas.hansson@arm.com fatal("%s: Unknown traffic generator mode: %s", 3659241Sandreas.hansson@arm.com name(), mode); 3669241Sandreas.hansson@arm.com } 3679241Sandreas.hansson@arm.com } else if (keyword == "TRANSITION") { 3689241Sandreas.hansson@arm.com Transition transition; 3699241Sandreas.hansson@arm.com 3709241Sandreas.hansson@arm.com is >> transition.from >> transition.to >> transition.p; 3719241Sandreas.hansson@arm.com 3729241Sandreas.hansson@arm.com transitions.push_back(transition); 3739241Sandreas.hansson@arm.com 3749241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Transition: %d -> %d\n", transition.from, 3759241Sandreas.hansson@arm.com transition.to); 3769241Sandreas.hansson@arm.com } else if (keyword == "INIT") { 3779241Sandreas.hansson@arm.com // set the initial state as the active state 3789241Sandreas.hansson@arm.com is >> currState; 3799241Sandreas.hansson@arm.com 38010128Sstan.czerniawski@arm.com init_state_set = true; 38110128Sstan.czerniawski@arm.com 3829241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Initial state: %d\n", currState); 3839241Sandreas.hansson@arm.com } 3849241Sandreas.hansson@arm.com } 3859241Sandreas.hansson@arm.com } 3869241Sandreas.hansson@arm.com 38710128Sstan.czerniawski@arm.com if (!init_state_set) 38810128Sstan.czerniawski@arm.com fatal("%s: initial state not specified (add 'INIT <id>' line " 38910128Sstan.czerniawski@arm.com "to the config file)\n", name()); 39010128Sstan.czerniawski@arm.com 3919241Sandreas.hansson@arm.com // resize and populate state transition matrix 3929721Ssascha.bischoff@arm.com transitionMatrix.resize(states.size()); 3939721Ssascha.bischoff@arm.com for (size_t i = 0; i < states.size(); i++) { 3949721Ssascha.bischoff@arm.com transitionMatrix[i].resize(states.size()); 3959241Sandreas.hansson@arm.com } 3969241Sandreas.hansson@arm.com 3979241Sandreas.hansson@arm.com for (vector<Transition>::iterator t = transitions.begin(); 3989241Sandreas.hansson@arm.com t != transitions.end(); ++t) { 3999241Sandreas.hansson@arm.com transitionMatrix[t->from][t->to] = t->p; 4009241Sandreas.hansson@arm.com } 4019241Sandreas.hansson@arm.com 4029241Sandreas.hansson@arm.com // ensure the egress edges do not have a probability larger than 4039241Sandreas.hansson@arm.com // one 4049721Ssascha.bischoff@arm.com for (size_t i = 0; i < states.size(); i++) { 4059241Sandreas.hansson@arm.com double sum = 0; 4069721Ssascha.bischoff@arm.com for (size_t j = 0; j < states.size(); j++) { 4079241Sandreas.hansson@arm.com sum += transitionMatrix[i][j]; 4089241Sandreas.hansson@arm.com } 4099241Sandreas.hansson@arm.com 4109241Sandreas.hansson@arm.com // avoid comparing floating point numbers 4119241Sandreas.hansson@arm.com if (abs(sum - 1.0) > 0.001) 4129241Sandreas.hansson@arm.com fatal("%s has transition probability != 1 for state %d\n", 4139241Sandreas.hansson@arm.com name(), i); 4149241Sandreas.hansson@arm.com } 4159241Sandreas.hansson@arm.com 4169241Sandreas.hansson@arm.com // close input file 4179241Sandreas.hansson@arm.com infile.close(); 4189241Sandreas.hansson@arm.com} 4199241Sandreas.hansson@arm.com 4209241Sandreas.hansson@arm.comvoid 4219717Sandreas.hansson@arm.comTrafficGen::transition() 4229241Sandreas.hansson@arm.com{ 4239241Sandreas.hansson@arm.com // exit the current state 4249241Sandreas.hansson@arm.com states[currState]->exit(); 4259241Sandreas.hansson@arm.com 4269241Sandreas.hansson@arm.com // determine next state 42710348Sandreas.hansson@arm.com double p = random_mt.random<double>(); 4289241Sandreas.hansson@arm.com assert(currState < transitionMatrix.size()); 4299584Sandreas@sandberg.pp.se double cumulative = 0.0; 4309584Sandreas@sandberg.pp.se size_t i = 0; 4319584Sandreas@sandberg.pp.se do { 4329241Sandreas.hansson@arm.com cumulative += transitionMatrix[currState][i]; 4339241Sandreas.hansson@arm.com ++i; 4349584Sandreas@sandberg.pp.se } while (cumulative < p && i < transitionMatrix[currState].size()); 4359584Sandreas@sandberg.pp.se 4369584Sandreas@sandberg.pp.se enterState(i - 1); 4379241Sandreas.hansson@arm.com} 4389241Sandreas.hansson@arm.com 4399241Sandreas.hansson@arm.comvoid 4409717Sandreas.hansson@arm.comTrafficGen::enterState(uint32_t newState) 4419241Sandreas.hansson@arm.com{ 4429241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Transition to state %d\n", newState); 4439241Sandreas.hansson@arm.com 4449241Sandreas.hansson@arm.com currState = newState; 4459719Sandreas.hansson@arm.com // we could have been delayed and not transitioned on the exact 4469719Sandreas.hansson@arm.com // tick when we were supposed to (due to back pressure when 4479719Sandreas.hansson@arm.com // sending a packet) 4489719Sandreas.hansson@arm.com nextTransitionTick = curTick() + states[currState]->duration; 4499241Sandreas.hansson@arm.com states[currState]->enter(); 4509241Sandreas.hansson@arm.com} 4519241Sandreas.hansson@arm.com 4529719Sandreas.hansson@arm.comvoid 4539719Sandreas.hansson@arm.comTrafficGen::recvRetry() 4549719Sandreas.hansson@arm.com{ 4559719Sandreas.hansson@arm.com assert(retryPkt != NULL); 4569719Sandreas.hansson@arm.com 4579719Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Received retry\n"); 4589719Sandreas.hansson@arm.com numRetries++; 4599719Sandreas.hansson@arm.com // attempt to send the packet, and if we are successful start up 4609719Sandreas.hansson@arm.com // the machinery again 4619719Sandreas.hansson@arm.com if (port.sendTimingReq(retryPkt)) { 4629719Sandreas.hansson@arm.com retryPkt = NULL; 4639719Sandreas.hansson@arm.com // remember how much delay was incurred due to back-pressure 4649720Sandreas.hansson@arm.com // when sending the request, we also use this to derive 4659720Sandreas.hansson@arm.com // the tick for the next packet 4669719Sandreas.hansson@arm.com Tick delay = curTick() - retryPktTick; 4679719Sandreas.hansson@arm.com retryPktTick = 0; 4689719Sandreas.hansson@arm.com retryTicks += delay; 4699719Sandreas.hansson@arm.com 4709719Sandreas.hansson@arm.com if (drainManager == NULL) { 4719719Sandreas.hansson@arm.com // packet is sent, so find out when the next one is due 4729720Sandreas.hansson@arm.com nextPacketTick = states[currState]->nextPacketTick(elasticReq, 4739720Sandreas.hansson@arm.com delay); 4749719Sandreas.hansson@arm.com Tick nextEventTick = std::min(nextPacketTick, nextTransitionTick); 4759719Sandreas.hansson@arm.com schedule(updateEvent, std::max(curTick(), nextEventTick)); 4769719Sandreas.hansson@arm.com } else { 4779719Sandreas.hansson@arm.com // shut things down 4789719Sandreas.hansson@arm.com nextPacketTick = MaxTick; 4799719Sandreas.hansson@arm.com nextTransitionTick = MaxTick; 4809719Sandreas.hansson@arm.com drainManager->signalDrainDone(); 4819719Sandreas.hansson@arm.com // Clear the drain event once we're done with it. 4829719Sandreas.hansson@arm.com drainManager = NULL; 4839719Sandreas.hansson@arm.com } 4849719Sandreas.hansson@arm.com } 4859719Sandreas.hansson@arm.com} 4869719Sandreas.hansson@arm.com 4879719Sandreas.hansson@arm.comvoid 4889719Sandreas.hansson@arm.comTrafficGen::regStats() 4899719Sandreas.hansson@arm.com{ 4909719Sandreas.hansson@arm.com // Initialise all the stats 4919719Sandreas.hansson@arm.com using namespace Stats; 4929719Sandreas.hansson@arm.com 4939719Sandreas.hansson@arm.com numPackets 4949719Sandreas.hansson@arm.com .name(name() + ".numPackets") 4959719Sandreas.hansson@arm.com .desc("Number of packets generated"); 4969719Sandreas.hansson@arm.com 4979719Sandreas.hansson@arm.com numRetries 4989719Sandreas.hansson@arm.com .name(name() + ".numRetries") 4999719Sandreas.hansson@arm.com .desc("Number of retries"); 5009719Sandreas.hansson@arm.com 5019719Sandreas.hansson@arm.com retryTicks 5029719Sandreas.hansson@arm.com .name(name() + ".retryTicks") 5039719Sandreas.hansson@arm.com .desc("Time spent waiting due to back-pressure (ticks)"); 5049719Sandreas.hansson@arm.com} 5059719Sandreas.hansson@arm.com 5069241Sandreas.hansson@arm.combool 5079241Sandreas.hansson@arm.comTrafficGen::TrafficGenPort::recvTimingResp(PacketPtr pkt) 5089241Sandreas.hansson@arm.com{ 5099241Sandreas.hansson@arm.com delete pkt->req; 5109241Sandreas.hansson@arm.com delete pkt; 5119241Sandreas.hansson@arm.com 5129241Sandreas.hansson@arm.com return true; 5139241Sandreas.hansson@arm.com} 514