traffic_gen.cc revision 11491
19241Sandreas.hansson@arm.com/* 211491Sandreas.hansson@arm.com * Copyright (c) 2012-2013, 2016 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), 6011491Sandreas.hansson@arm.com progressCheck(p->progress_check), 6111491Sandreas.hansson@arm.com noProgressEvent(this), 629717Sandreas.hansson@arm.com nextTransitionTick(0), 639719Sandreas.hansson@arm.com nextPacketTick(0), 6410360Sandreas.hansson@arm.com currState(0), 659241Sandreas.hansson@arm.com port(name() + ".port", *this), 669719Sandreas.hansson@arm.com retryPkt(NULL), 679719Sandreas.hansson@arm.com retryPktTick(0), 6811393Sandreas.hansson@arm.com updateEvent(this), 6911393Sandreas.hansson@arm.com numSuppressed(0) 709241Sandreas.hansson@arm.com{ 719241Sandreas.hansson@arm.com} 729241Sandreas.hansson@arm.com 739241Sandreas.hansson@arm.comTrafficGen* 749241Sandreas.hansson@arm.comTrafficGenParams::create() 759241Sandreas.hansson@arm.com{ 769241Sandreas.hansson@arm.com return new TrafficGen(this); 779241Sandreas.hansson@arm.com} 789241Sandreas.hansson@arm.com 799294Sandreas.hansson@arm.comBaseMasterPort& 809294Sandreas.hansson@arm.comTrafficGen::getMasterPort(const string& if_name, PortID idx) 819241Sandreas.hansson@arm.com{ 829241Sandreas.hansson@arm.com if (if_name == "port") { 839241Sandreas.hansson@arm.com return port; 849241Sandreas.hansson@arm.com } else { 859241Sandreas.hansson@arm.com return MemObject::getMasterPort(if_name, idx); 869241Sandreas.hansson@arm.com } 879241Sandreas.hansson@arm.com} 889241Sandreas.hansson@arm.com 899241Sandreas.hansson@arm.comvoid 909241Sandreas.hansson@arm.comTrafficGen::init() 919241Sandreas.hansson@arm.com{ 929241Sandreas.hansson@arm.com if (!port.isConnected()) 939241Sandreas.hansson@arm.com fatal("The port of %s is not connected!\n", name()); 949241Sandreas.hansson@arm.com 959241Sandreas.hansson@arm.com // if the system is in timing mode active the request generator 969524SAndreas.Sandberg@ARM.com if (system->isTimingMode()) { 979241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Timing mode, activating request generator\n"); 989241Sandreas.hansson@arm.com 999718Sandreas.hansson@arm.com parseConfig(); 1009718Sandreas.hansson@arm.com 1019241Sandreas.hansson@arm.com // enter initial state 1029717Sandreas.hansson@arm.com enterState(currState); 1039241Sandreas.hansson@arm.com } else { 1049241Sandreas.hansson@arm.com DPRINTF(TrafficGen, 1059241Sandreas.hansson@arm.com "Traffic generator is only active in timing mode\n"); 1069241Sandreas.hansson@arm.com } 1079241Sandreas.hansson@arm.com} 1089241Sandreas.hansson@arm.com 1099241Sandreas.hansson@arm.comvoid 1109241Sandreas.hansson@arm.comTrafficGen::initState() 1119241Sandreas.hansson@arm.com{ 1129241Sandreas.hansson@arm.com // when not restoring from a checkpoint, make sure we kick things off 1139524SAndreas.Sandberg@ARM.com if (system->isTimingMode()) { 1149719Sandreas.hansson@arm.com // call nextPacketTick on the state to advance it 1159720Sandreas.hansson@arm.com nextPacketTick = states[currState]->nextPacketTick(elasticReq, 0); 1169719Sandreas.hansson@arm.com schedule(updateEvent, std::min(nextPacketTick, nextTransitionTick)); 1179241Sandreas.hansson@arm.com } else { 1189241Sandreas.hansson@arm.com DPRINTF(TrafficGen, 1199241Sandreas.hansson@arm.com "Traffic generator is only active in timing mode\n"); 1209241Sandreas.hansson@arm.com } 1219241Sandreas.hansson@arm.com} 1229241Sandreas.hansson@arm.com 12310913Sandreas.sandberg@arm.comDrainState 12410913Sandreas.sandberg@arm.comTrafficGen::drain() 1259241Sandreas.hansson@arm.com{ 12610051Srioshering@gmail.com if (!updateEvent.scheduled()) { 12710051Srioshering@gmail.com // no event has been scheduled yet (e.g. switched from atomic mode) 12810913Sandreas.sandberg@arm.com return DrainState::Drained; 12910051Srioshering@gmail.com } 13010051Srioshering@gmail.com 1319719Sandreas.hansson@arm.com if (retryPkt == NULL) { 1329719Sandreas.hansson@arm.com // shut things down 1339719Sandreas.hansson@arm.com nextPacketTick = MaxTick; 1349719Sandreas.hansson@arm.com nextTransitionTick = MaxTick; 1359719Sandreas.hansson@arm.com deschedule(updateEvent); 13610913Sandreas.sandberg@arm.com return DrainState::Drained; 1379719Sandreas.hansson@arm.com } else { 13810913Sandreas.sandberg@arm.com return DrainState::Draining; 1399719Sandreas.hansson@arm.com } 1409241Sandreas.hansson@arm.com} 1419241Sandreas.hansson@arm.com 1429241Sandreas.hansson@arm.comvoid 14310905Sandreas.sandberg@arm.comTrafficGen::serialize(CheckpointOut &cp) const 1449241Sandreas.hansson@arm.com{ 1459241Sandreas.hansson@arm.com DPRINTF(Checkpoint, "Serializing TrafficGen\n"); 1469241Sandreas.hansson@arm.com 1479241Sandreas.hansson@arm.com // save ticks of the graph event if it is scheduled 1489719Sandreas.hansson@arm.com Tick nextEvent = updateEvent.scheduled() ? updateEvent.when() : 0; 1499241Sandreas.hansson@arm.com 1509719Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Saving nextEvent=%llu\n", nextEvent); 1519241Sandreas.hansson@arm.com 1529717Sandreas.hansson@arm.com SERIALIZE_SCALAR(nextEvent); 1539241Sandreas.hansson@arm.com 1549241Sandreas.hansson@arm.com SERIALIZE_SCALAR(nextTransitionTick); 1559241Sandreas.hansson@arm.com 1569719Sandreas.hansson@arm.com SERIALIZE_SCALAR(nextPacketTick); 1579719Sandreas.hansson@arm.com 1589719Sandreas.hansson@arm.com SERIALIZE_SCALAR(currState); 1599241Sandreas.hansson@arm.com} 1609241Sandreas.hansson@arm.com 1619241Sandreas.hansson@arm.comvoid 16210905Sandreas.sandberg@arm.comTrafficGen::unserialize(CheckpointIn &cp) 1639241Sandreas.hansson@arm.com{ 1649241Sandreas.hansson@arm.com // restore scheduled events 1659717Sandreas.hansson@arm.com Tick nextEvent; 1669717Sandreas.hansson@arm.com UNSERIALIZE_SCALAR(nextEvent); 1679717Sandreas.hansson@arm.com if (nextEvent != 0) { 1689717Sandreas.hansson@arm.com schedule(updateEvent, nextEvent); 1699241Sandreas.hansson@arm.com } 1709241Sandreas.hansson@arm.com 1719241Sandreas.hansson@arm.com UNSERIALIZE_SCALAR(nextTransitionTick); 1729719Sandreas.hansson@arm.com 1739719Sandreas.hansson@arm.com UNSERIALIZE_SCALAR(nextPacketTick); 1749719Sandreas.hansson@arm.com 1759719Sandreas.hansson@arm.com // @todo In the case of a stateful generator state such as the 1769719Sandreas.hansson@arm.com // trace player we would also have to restore the position in the 1779720Sandreas.hansson@arm.com // trace playback and the tick offset 1789719Sandreas.hansson@arm.com UNSERIALIZE_SCALAR(currState); 1799241Sandreas.hansson@arm.com} 1809241Sandreas.hansson@arm.com 1819241Sandreas.hansson@arm.comvoid 1829717Sandreas.hansson@arm.comTrafficGen::update() 1839241Sandreas.hansson@arm.com{ 18411491Sandreas.hansson@arm.com // shift our progress-tracking event forward 18511491Sandreas.hansson@arm.com reschedule(noProgressEvent, curTick() + progressCheck, true); 18611491Sandreas.hansson@arm.com 1879717Sandreas.hansson@arm.com // if we have reached the time for the next state transition, then 1889717Sandreas.hansson@arm.com // perform the transition 1899717Sandreas.hansson@arm.com if (curTick() >= nextTransitionTick) { 1909717Sandreas.hansson@arm.com transition(); 1919717Sandreas.hansson@arm.com } else { 1929719Sandreas.hansson@arm.com assert(curTick() >= nextPacketTick); 1939719Sandreas.hansson@arm.com // get the next packet and try to send it 1949718Sandreas.hansson@arm.com PacketPtr pkt = states[currState]->getNextPacket(); 19510266Sandreas.hansson@arm.com 19610266Sandreas.hansson@arm.com // suppress packets that are not destined for a memory, such as 19710266Sandreas.hansson@arm.com // device accesses that could be part of a trace 19810266Sandreas.hansson@arm.com if (system->isMemAddr(pkt->getAddr())) { 19910266Sandreas.hansson@arm.com numPackets++; 20010266Sandreas.hansson@arm.com if (!port.sendTimingReq(pkt)) { 20110266Sandreas.hansson@arm.com retryPkt = pkt; 20210266Sandreas.hansson@arm.com retryPktTick = curTick(); 20310266Sandreas.hansson@arm.com } 20410266Sandreas.hansson@arm.com } else { 20510266Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Suppressed packet %s 0x%x\n", 20610266Sandreas.hansson@arm.com pkt->cmdString(), pkt->getAddr()); 20711393Sandreas.hansson@arm.com 20811393Sandreas.hansson@arm.com ++numSuppressed; 20911393Sandreas.hansson@arm.com if (numSuppressed % 10000) 21011393Sandreas.hansson@arm.com warn("%s suppressed %d packets with non-memory addresses\n", 21111393Sandreas.hansson@arm.com name(), numSuppressed); 21211393Sandreas.hansson@arm.com 21311222Sandreas.hansson@arm.com delete pkt->req; 21411222Sandreas.hansson@arm.com delete pkt; 21511222Sandreas.hansson@arm.com pkt = nullptr; 2169719Sandreas.hansson@arm.com } 2179719Sandreas.hansson@arm.com } 2189719Sandreas.hansson@arm.com 2199719Sandreas.hansson@arm.com // if we are waiting for a retry, do not schedule any further 2209719Sandreas.hansson@arm.com // events, in the case of a transition or a successful send, go 2219719Sandreas.hansson@arm.com // ahead and determine when the next update should take place 2229719Sandreas.hansson@arm.com if (retryPkt == NULL) { 2239719Sandreas.hansson@arm.com // schedule next update event based on either the next execute 2249719Sandreas.hansson@arm.com // tick or the next transition, which ever comes first 2259720Sandreas.hansson@arm.com nextPacketTick = states[currState]->nextPacketTick(elasticReq, 0); 2269719Sandreas.hansson@arm.com Tick nextEventTick = std::min(nextPacketTick, nextTransitionTick); 2279719Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Next event scheduled at %lld\n", nextEventTick); 2289719Sandreas.hansson@arm.com schedule(updateEvent, nextEventTick); 2299717Sandreas.hansson@arm.com } 2309241Sandreas.hansson@arm.com} 2319241Sandreas.hansson@arm.com 2329241Sandreas.hansson@arm.comvoid 2339718Sandreas.hansson@arm.comTrafficGen::parseConfig() 2349241Sandreas.hansson@arm.com{ 2359241Sandreas.hansson@arm.com // keep track of the transitions parsed to create the matrix when 2369241Sandreas.hansson@arm.com // done 2379241Sandreas.hansson@arm.com vector<Transition> transitions; 2389241Sandreas.hansson@arm.com 2399241Sandreas.hansson@arm.com // open input file 2409241Sandreas.hansson@arm.com ifstream infile; 2419718Sandreas.hansson@arm.com infile.open(configFile.c_str(), ifstream::in); 2429241Sandreas.hansson@arm.com if (!infile.is_open()) { 2439241Sandreas.hansson@arm.com fatal("Traffic generator %s config file not found at %s\n", 2449718Sandreas.hansson@arm.com name(), configFile); 2459241Sandreas.hansson@arm.com } 2469241Sandreas.hansson@arm.com 24710128Sstan.czerniawski@arm.com bool init_state_set = false; 24810128Sstan.czerniawski@arm.com 2499241Sandreas.hansson@arm.com // read line by line and determine the action based on the first 2509241Sandreas.hansson@arm.com // keyword 2519241Sandreas.hansson@arm.com string keyword; 2529241Sandreas.hansson@arm.com string line; 2539241Sandreas.hansson@arm.com 2549241Sandreas.hansson@arm.com while (getline(infile, line).good()) { 2559241Sandreas.hansson@arm.com // see if this line is a comment line, and if so skip it 2569241Sandreas.hansson@arm.com if (line.find('#') != 1) { 2579241Sandreas.hansson@arm.com // create an input stream for the tokenization 2589241Sandreas.hansson@arm.com istringstream is(line); 2599241Sandreas.hansson@arm.com 2609241Sandreas.hansson@arm.com // determine the keyword 2619241Sandreas.hansson@arm.com is >> keyword; 2629241Sandreas.hansson@arm.com 2639241Sandreas.hansson@arm.com if (keyword == "STATE") { 2649241Sandreas.hansson@arm.com // parse the behaviour of this state 2659241Sandreas.hansson@arm.com uint32_t id; 2669241Sandreas.hansson@arm.com Tick duration; 2679241Sandreas.hansson@arm.com string mode; 2689241Sandreas.hansson@arm.com 2699241Sandreas.hansson@arm.com is >> id >> duration >> mode; 2709241Sandreas.hansson@arm.com 2719241Sandreas.hansson@arm.com if (mode == "TRACE") { 2729241Sandreas.hansson@arm.com string traceFile; 2739241Sandreas.hansson@arm.com Addr addrOffset; 2749241Sandreas.hansson@arm.com 2759241Sandreas.hansson@arm.com is >> traceFile >> addrOffset; 2769241Sandreas.hansson@arm.com 2779718Sandreas.hansson@arm.com states[id] = new TraceGen(name(), masterID, duration, 2789241Sandreas.hansson@arm.com traceFile, addrOffset); 2799241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "State: %d TraceGen\n", id); 2809241Sandreas.hansson@arm.com } else if (mode == "IDLE") { 2819718Sandreas.hansson@arm.com states[id] = new IdleGen(name(), masterID, duration); 2829241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "State: %d IdleGen\n", id); 28310138Sneha.agarwal@arm.com } else if (mode == "LINEAR" || mode == "RANDOM" || 28410392Swendy.elsasser@arm.com mode == "DRAM" || mode == "DRAM_ROTATE") { 2859241Sandreas.hansson@arm.com uint32_t read_percent; 2869241Sandreas.hansson@arm.com Addr start_addr; 2879241Sandreas.hansson@arm.com Addr end_addr; 2889241Sandreas.hansson@arm.com Addr blocksize; 2899241Sandreas.hansson@arm.com Tick min_period; 2909241Sandreas.hansson@arm.com Tick max_period; 2919241Sandreas.hansson@arm.com Addr data_limit; 2929241Sandreas.hansson@arm.com 2939241Sandreas.hansson@arm.com is >> read_percent >> start_addr >> end_addr >> 2949241Sandreas.hansson@arm.com blocksize >> min_period >> max_period >> data_limit; 2959241Sandreas.hansson@arm.com 2969241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "%s, addr %x to %x, size %d," 2979241Sandreas.hansson@arm.com " period %d to %d, %d%% reads\n", 2989241Sandreas.hansson@arm.com mode, start_addr, end_addr, blocksize, min_period, 2999241Sandreas.hansson@arm.com max_period, read_percent); 3009241Sandreas.hansson@arm.com 3019718Sandreas.hansson@arm.com 3029814Sandreas.hansson@arm.com if (blocksize > system->cacheLineSize()) 3039718Sandreas.hansson@arm.com fatal("TrafficGen %s block size (%d) is larger than " 30410138Sneha.agarwal@arm.com "cache line size (%d)\n", name(), 3059814Sandreas.hansson@arm.com blocksize, system->cacheLineSize()); 3069718Sandreas.hansson@arm.com 3079241Sandreas.hansson@arm.com if (read_percent > 100) 3089718Sandreas.hansson@arm.com fatal("%s cannot have more than 100% reads", name()); 3099241Sandreas.hansson@arm.com 3109722Ssascha.bischoff@arm.com if (min_period > max_period) 3119722Ssascha.bischoff@arm.com fatal("%s cannot have min_period > max_period", name()); 3129722Ssascha.bischoff@arm.com 3139241Sandreas.hansson@arm.com if (mode == "LINEAR") { 3149718Sandreas.hansson@arm.com states[id] = new LinearGen(name(), masterID, 3159241Sandreas.hansson@arm.com duration, start_addr, 3169241Sandreas.hansson@arm.com end_addr, blocksize, 3179241Sandreas.hansson@arm.com min_period, max_period, 3189241Sandreas.hansson@arm.com read_percent, data_limit); 3199241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "State: %d LinearGen\n", id); 3209241Sandreas.hansson@arm.com } else if (mode == "RANDOM") { 3219718Sandreas.hansson@arm.com states[id] = new RandomGen(name(), masterID, 3229241Sandreas.hansson@arm.com duration, start_addr, 3239241Sandreas.hansson@arm.com end_addr, blocksize, 3249241Sandreas.hansson@arm.com min_period, max_period, 3259241Sandreas.hansson@arm.com read_percent, data_limit); 3269241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "State: %d RandomGen\n", id); 32710392Swendy.elsasser@arm.com } else if (mode == "DRAM" || mode == "DRAM_ROTATE") { 32810138Sneha.agarwal@arm.com // stride size (bytes) of the request for achieving 32910138Sneha.agarwal@arm.com // required hit length 33010138Sneha.agarwal@arm.com unsigned int stride_size; 33110138Sneha.agarwal@arm.com unsigned int page_size; 33210138Sneha.agarwal@arm.com unsigned int nbr_of_banks_DRAM; 33310138Sneha.agarwal@arm.com unsigned int nbr_of_banks_util; 33410138Sneha.agarwal@arm.com unsigned int addr_mapping; 33510392Swendy.elsasser@arm.com unsigned int nbr_of_ranks; 33610138Sneha.agarwal@arm.com 33710138Sneha.agarwal@arm.com is >> stride_size >> page_size >> nbr_of_banks_DRAM >> 33810392Swendy.elsasser@arm.com nbr_of_banks_util >> addr_mapping >> 33910392Swendy.elsasser@arm.com nbr_of_ranks; 34010138Sneha.agarwal@arm.com 34110138Sneha.agarwal@arm.com if (stride_size > page_size) 34210138Sneha.agarwal@arm.com warn("DRAM generator stride size (%d) is greater " 34310138Sneha.agarwal@arm.com "than page size (%d) of the memory\n", 34410138Sneha.agarwal@arm.com blocksize, page_size); 34510138Sneha.agarwal@arm.com 34610138Sneha.agarwal@arm.com if (nbr_of_banks_util > nbr_of_banks_DRAM) 34710746Swendy.elsasser@arm.com fatal("Attempting to use more banks (%d) than " 34810746Swendy.elsasser@arm.com "what is available (%d)\n", 34910138Sneha.agarwal@arm.com nbr_of_banks_util, nbr_of_banks_DRAM); 35010138Sneha.agarwal@arm.com 35110138Sneha.agarwal@arm.com // count the number of sequential packets to 35210138Sneha.agarwal@arm.com // generate 35310138Sneha.agarwal@arm.com unsigned int num_seq_pkts = 1; 35410138Sneha.agarwal@arm.com 35510138Sneha.agarwal@arm.com if (stride_size > blocksize) { 35610138Sneha.agarwal@arm.com num_seq_pkts = divCeil(stride_size, blocksize); 35710138Sneha.agarwal@arm.com DPRINTF(TrafficGen, "stride size: %d " 35810138Sneha.agarwal@arm.com "block size: %d, num_seq_pkts: %d\n", 35910138Sneha.agarwal@arm.com stride_size, blocksize, num_seq_pkts); 36010138Sneha.agarwal@arm.com } 36110138Sneha.agarwal@arm.com 36210392Swendy.elsasser@arm.com if (mode == "DRAM") { 36310392Swendy.elsasser@arm.com states[id] = new DramGen(name(), masterID, 36410392Swendy.elsasser@arm.com duration, start_addr, 36510392Swendy.elsasser@arm.com end_addr, blocksize, 36610392Swendy.elsasser@arm.com min_period, max_period, 36710392Swendy.elsasser@arm.com read_percent, data_limit, 36810392Swendy.elsasser@arm.com num_seq_pkts, page_size, 36910392Swendy.elsasser@arm.com nbr_of_banks_DRAM, 37010392Swendy.elsasser@arm.com nbr_of_banks_util, 37110392Swendy.elsasser@arm.com addr_mapping, 37210392Swendy.elsasser@arm.com nbr_of_ranks); 37310392Swendy.elsasser@arm.com DPRINTF(TrafficGen, "State: %d DramGen\n", id); 37410392Swendy.elsasser@arm.com } else { 37510392Swendy.elsasser@arm.com // Will rotate to the next rank after rotating 37610392Swendy.elsasser@arm.com // through all banks, for each command type. 37710392Swendy.elsasser@arm.com // In the 50% read case, series will be issued 37810392Swendy.elsasser@arm.com // for both RD & WR before the rank in incremented 37910392Swendy.elsasser@arm.com unsigned int max_seq_count_per_rank = 38010392Swendy.elsasser@arm.com (read_percent == 50) ? nbr_of_banks_util * 2 38110392Swendy.elsasser@arm.com : nbr_of_banks_util; 38210392Swendy.elsasser@arm.com 38310392Swendy.elsasser@arm.com states[id] = new DramRotGen(name(), masterID, 38410392Swendy.elsasser@arm.com duration, start_addr, 38510392Swendy.elsasser@arm.com end_addr, blocksize, 38610392Swendy.elsasser@arm.com min_period, max_period, 38710392Swendy.elsasser@arm.com read_percent, data_limit, 38810392Swendy.elsasser@arm.com num_seq_pkts, page_size, 38910392Swendy.elsasser@arm.com nbr_of_banks_DRAM, 39010392Swendy.elsasser@arm.com nbr_of_banks_util, 39110392Swendy.elsasser@arm.com addr_mapping, 39210392Swendy.elsasser@arm.com nbr_of_ranks, 39310392Swendy.elsasser@arm.com max_seq_count_per_rank); 39410392Swendy.elsasser@arm.com DPRINTF(TrafficGen, "State: %d DramRotGen\n", id); 39510392Swendy.elsasser@arm.com } 3969241Sandreas.hansson@arm.com } 3979241Sandreas.hansson@arm.com } else { 3989241Sandreas.hansson@arm.com fatal("%s: Unknown traffic generator mode: %s", 3999241Sandreas.hansson@arm.com name(), mode); 4009241Sandreas.hansson@arm.com } 4019241Sandreas.hansson@arm.com } else if (keyword == "TRANSITION") { 4029241Sandreas.hansson@arm.com Transition transition; 4039241Sandreas.hansson@arm.com 4049241Sandreas.hansson@arm.com is >> transition.from >> transition.to >> transition.p; 4059241Sandreas.hansson@arm.com 4069241Sandreas.hansson@arm.com transitions.push_back(transition); 4079241Sandreas.hansson@arm.com 4089241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Transition: %d -> %d\n", transition.from, 4099241Sandreas.hansson@arm.com transition.to); 4109241Sandreas.hansson@arm.com } else if (keyword == "INIT") { 4119241Sandreas.hansson@arm.com // set the initial state as the active state 4129241Sandreas.hansson@arm.com is >> currState; 4139241Sandreas.hansson@arm.com 41410128Sstan.czerniawski@arm.com init_state_set = true; 41510128Sstan.czerniawski@arm.com 4169241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Initial state: %d\n", currState); 4179241Sandreas.hansson@arm.com } 4189241Sandreas.hansson@arm.com } 4199241Sandreas.hansson@arm.com } 4209241Sandreas.hansson@arm.com 42110128Sstan.czerniawski@arm.com if (!init_state_set) 42210128Sstan.czerniawski@arm.com fatal("%s: initial state not specified (add 'INIT <id>' line " 42310128Sstan.czerniawski@arm.com "to the config file)\n", name()); 42410128Sstan.czerniawski@arm.com 4259241Sandreas.hansson@arm.com // resize and populate state transition matrix 4269721Ssascha.bischoff@arm.com transitionMatrix.resize(states.size()); 4279721Ssascha.bischoff@arm.com for (size_t i = 0; i < states.size(); i++) { 4289721Ssascha.bischoff@arm.com transitionMatrix[i].resize(states.size()); 4299241Sandreas.hansson@arm.com } 4309241Sandreas.hansson@arm.com 4319241Sandreas.hansson@arm.com for (vector<Transition>::iterator t = transitions.begin(); 4329241Sandreas.hansson@arm.com t != transitions.end(); ++t) { 4339241Sandreas.hansson@arm.com transitionMatrix[t->from][t->to] = t->p; 4349241Sandreas.hansson@arm.com } 4359241Sandreas.hansson@arm.com 4369241Sandreas.hansson@arm.com // ensure the egress edges do not have a probability larger than 4379241Sandreas.hansson@arm.com // one 4389721Ssascha.bischoff@arm.com for (size_t i = 0; i < states.size(); i++) { 4399241Sandreas.hansson@arm.com double sum = 0; 4409721Ssascha.bischoff@arm.com for (size_t j = 0; j < states.size(); j++) { 4419241Sandreas.hansson@arm.com sum += transitionMatrix[i][j]; 4429241Sandreas.hansson@arm.com } 4439241Sandreas.hansson@arm.com 4449241Sandreas.hansson@arm.com // avoid comparing floating point numbers 4459241Sandreas.hansson@arm.com if (abs(sum - 1.0) > 0.001) 4469241Sandreas.hansson@arm.com fatal("%s has transition probability != 1 for state %d\n", 4479241Sandreas.hansson@arm.com name(), i); 4489241Sandreas.hansson@arm.com } 4499241Sandreas.hansson@arm.com 4509241Sandreas.hansson@arm.com // close input file 4519241Sandreas.hansson@arm.com infile.close(); 4529241Sandreas.hansson@arm.com} 4539241Sandreas.hansson@arm.com 4549241Sandreas.hansson@arm.comvoid 4559717Sandreas.hansson@arm.comTrafficGen::transition() 4569241Sandreas.hansson@arm.com{ 4579241Sandreas.hansson@arm.com // exit the current state 4589241Sandreas.hansson@arm.com states[currState]->exit(); 4599241Sandreas.hansson@arm.com 4609241Sandreas.hansson@arm.com // determine next state 46110348Sandreas.hansson@arm.com double p = random_mt.random<double>(); 4629241Sandreas.hansson@arm.com assert(currState < transitionMatrix.size()); 4639584Sandreas@sandberg.pp.se double cumulative = 0.0; 4649584Sandreas@sandberg.pp.se size_t i = 0; 4659584Sandreas@sandberg.pp.se do { 4669241Sandreas.hansson@arm.com cumulative += transitionMatrix[currState][i]; 4679241Sandreas.hansson@arm.com ++i; 4689584Sandreas@sandberg.pp.se } while (cumulative < p && i < transitionMatrix[currState].size()); 4699584Sandreas@sandberg.pp.se 4709584Sandreas@sandberg.pp.se enterState(i - 1); 4719241Sandreas.hansson@arm.com} 4729241Sandreas.hansson@arm.com 4739241Sandreas.hansson@arm.comvoid 4749717Sandreas.hansson@arm.comTrafficGen::enterState(uint32_t newState) 4759241Sandreas.hansson@arm.com{ 4769241Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Transition to state %d\n", newState); 4779241Sandreas.hansson@arm.com 4789241Sandreas.hansson@arm.com currState = newState; 4799719Sandreas.hansson@arm.com // we could have been delayed and not transitioned on the exact 4809719Sandreas.hansson@arm.com // tick when we were supposed to (due to back pressure when 4819719Sandreas.hansson@arm.com // sending a packet) 4829719Sandreas.hansson@arm.com nextTransitionTick = curTick() + states[currState]->duration; 4839241Sandreas.hansson@arm.com states[currState]->enter(); 4849241Sandreas.hansson@arm.com} 4859241Sandreas.hansson@arm.com 4869719Sandreas.hansson@arm.comvoid 48710713Sandreas.hansson@arm.comTrafficGen::recvReqRetry() 4889719Sandreas.hansson@arm.com{ 4899719Sandreas.hansson@arm.com assert(retryPkt != NULL); 4909719Sandreas.hansson@arm.com 4919719Sandreas.hansson@arm.com DPRINTF(TrafficGen, "Received retry\n"); 4929719Sandreas.hansson@arm.com numRetries++; 4939719Sandreas.hansson@arm.com // attempt to send the packet, and if we are successful start up 4949719Sandreas.hansson@arm.com // the machinery again 4959719Sandreas.hansson@arm.com if (port.sendTimingReq(retryPkt)) { 4969719Sandreas.hansson@arm.com retryPkt = NULL; 4979719Sandreas.hansson@arm.com // remember how much delay was incurred due to back-pressure 4989720Sandreas.hansson@arm.com // when sending the request, we also use this to derive 4999720Sandreas.hansson@arm.com // the tick for the next packet 5009719Sandreas.hansson@arm.com Tick delay = curTick() - retryPktTick; 5019719Sandreas.hansson@arm.com retryPktTick = 0; 5029719Sandreas.hansson@arm.com retryTicks += delay; 5039719Sandreas.hansson@arm.com 50410913Sandreas.sandberg@arm.com if (drainState() != DrainState::Draining) { 5059719Sandreas.hansson@arm.com // packet is sent, so find out when the next one is due 5069720Sandreas.hansson@arm.com nextPacketTick = states[currState]->nextPacketTick(elasticReq, 5079720Sandreas.hansson@arm.com delay); 5089719Sandreas.hansson@arm.com Tick nextEventTick = std::min(nextPacketTick, nextTransitionTick); 5099719Sandreas.hansson@arm.com schedule(updateEvent, std::max(curTick(), nextEventTick)); 5109719Sandreas.hansson@arm.com } else { 5119719Sandreas.hansson@arm.com // shut things down 5129719Sandreas.hansson@arm.com nextPacketTick = MaxTick; 5139719Sandreas.hansson@arm.com nextTransitionTick = MaxTick; 51410913Sandreas.sandberg@arm.com signalDrainDone(); 5159719Sandreas.hansson@arm.com } 5169719Sandreas.hansson@arm.com } 5179719Sandreas.hansson@arm.com} 5189719Sandreas.hansson@arm.com 5199719Sandreas.hansson@arm.comvoid 52011491Sandreas.hansson@arm.comTrafficGen::noProgress() 52111491Sandreas.hansson@arm.com{ 52211491Sandreas.hansson@arm.com fatal("TrafficGen %s spent %llu ticks without making progress", 52311491Sandreas.hansson@arm.com name(), progressCheck); 52411491Sandreas.hansson@arm.com} 52511491Sandreas.hansson@arm.com 52611491Sandreas.hansson@arm.comvoid 5279719Sandreas.hansson@arm.comTrafficGen::regStats() 5289719Sandreas.hansson@arm.com{ 5299719Sandreas.hansson@arm.com // Initialise all the stats 5309719Sandreas.hansson@arm.com using namespace Stats; 5319719Sandreas.hansson@arm.com 5329719Sandreas.hansson@arm.com numPackets 5339719Sandreas.hansson@arm.com .name(name() + ".numPackets") 5349719Sandreas.hansson@arm.com .desc("Number of packets generated"); 5359719Sandreas.hansson@arm.com 5369719Sandreas.hansson@arm.com numRetries 5379719Sandreas.hansson@arm.com .name(name() + ".numRetries") 5389719Sandreas.hansson@arm.com .desc("Number of retries"); 5399719Sandreas.hansson@arm.com 5409719Sandreas.hansson@arm.com retryTicks 5419719Sandreas.hansson@arm.com .name(name() + ".retryTicks") 5429719Sandreas.hansson@arm.com .desc("Time spent waiting due to back-pressure (ticks)"); 5439719Sandreas.hansson@arm.com} 5449719Sandreas.hansson@arm.com 5459241Sandreas.hansson@arm.combool 5469241Sandreas.hansson@arm.comTrafficGen::TrafficGenPort::recvTimingResp(PacketPtr pkt) 5479241Sandreas.hansson@arm.com{ 5489241Sandreas.hansson@arm.com delete pkt->req; 5499241Sandreas.hansson@arm.com delete pkt; 5509241Sandreas.hansson@arm.com 5519241Sandreas.hansson@arm.com return true; 5529241Sandreas.hansson@arm.com} 553