1/* 2 * Copyright (c) 2012-2013, 2016-2018 ARM Limited 3 * All rights reserved 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions are 16 * met: redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer; 18 * redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution; 21 * neither the name of the copyright holders nor the names of its 22 * contributors may be used to endorse or promote products derived from 23 * this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 * 37 * Authors: Thomas Grass 38 * Andreas Hansson 39 * Sascha Bischoff 40 */ 41#include "cpu/testers/traffic_gen/base.hh" 42 43#include <sstream> 44 45#include "base/intmath.hh" 46#include "base/random.hh" 47#include "config/have_protobuf.hh" 48#include "cpu/testers/traffic_gen/base_gen.hh" 49#include "cpu/testers/traffic_gen/dram_gen.hh" 50#include "cpu/testers/traffic_gen/dram_rot_gen.hh" 51#include "cpu/testers/traffic_gen/exit_gen.hh" 52#include "cpu/testers/traffic_gen/idle_gen.hh" 53#include "cpu/testers/traffic_gen/linear_gen.hh" 54#include "cpu/testers/traffic_gen/random_gen.hh" 55#include "debug/Checkpoint.hh" 56#include "debug/TrafficGen.hh" 57#include "params/BaseTrafficGen.hh" 58#include "sim/sim_exit.hh" 59#include "sim/stats.hh" 60#include "sim/system.hh" 61 62#if HAVE_PROTOBUF 63#include "cpu/testers/traffic_gen/trace_gen.hh" 64#endif 65 66 67using namespace std; 68 69BaseTrafficGen::BaseTrafficGen(const BaseTrafficGenParams* p) 70 : MemObject(p), 71 system(p->system), 72 elasticReq(p->elastic_req), 73 progressCheck(p->progress_check), 74 noProgressEvent([this]{ noProgress(); }, name()), 75 nextTransitionTick(0), 76 nextPacketTick(0), 77 port(name() + ".port", *this), 78 retryPkt(NULL), 79 retryPktTick(0), 80 updateEvent([this]{ update(); }, name()), 81 numSuppressed(0), 82 masterID(system->getMasterId(this)) 83{ 84} 85 86BaseMasterPort& 87BaseTrafficGen::getMasterPort(const string& if_name, PortID idx) 88{ 89 if (if_name == "port") { 90 return port; 91 } else { 92 return MemObject::getMasterPort(if_name, idx); 93 } 94} 95 96void 97BaseTrafficGen::init() 98{ 99 MemObject::init(); 100 101 if (!port.isConnected()) 102 fatal("The port of %s is not connected!\n", name()); 103} 104 105DrainState 106BaseTrafficGen::drain() 107{ 108 if (!updateEvent.scheduled()) { 109 // no event has been scheduled yet (e.g. switched from atomic mode) 110 return DrainState::Drained; 111 } 112 113 if (retryPkt == NULL) { 114 // shut things down 115 nextPacketTick = MaxTick; 116 nextTransitionTick = MaxTick; 117 deschedule(updateEvent); 118 return DrainState::Drained; 119 } else { 120 return DrainState::Draining; 121 } 122} 123 124void 125BaseTrafficGen::serialize(CheckpointOut &cp) const 126{ 127 DPRINTF(Checkpoint, "Serializing BaseTrafficGen\n"); 128 129 // save ticks of the graph event if it is scheduled 130 Tick nextEvent = updateEvent.scheduled() ? updateEvent.when() : 0; 131 132 DPRINTF(TrafficGen, "Saving nextEvent=%llu\n", nextEvent); 133 134 SERIALIZE_SCALAR(nextEvent); 135 136 SERIALIZE_SCALAR(nextTransitionTick); 137 138 SERIALIZE_SCALAR(nextPacketTick); 139} 140 141void 142BaseTrafficGen::unserialize(CheckpointIn &cp) 143{ 144 // restore scheduled events 145 Tick nextEvent; 146 UNSERIALIZE_SCALAR(nextEvent); 147 if (nextEvent != 0) 148 schedule(updateEvent, nextEvent); 149 150 UNSERIALIZE_SCALAR(nextTransitionTick); 151 152 UNSERIALIZE_SCALAR(nextPacketTick); 153} 154 155void 156BaseTrafficGen::update() 157{ 158 // shift our progress-tracking event forward 159 reschedule(noProgressEvent, curTick() + progressCheck, true); 160 161 // if we have reached the time for the next state transition, then 162 // perform the transition 163 if (curTick() >= nextTransitionTick) { 164 transition(); 165 } else { 166 assert(curTick() >= nextPacketTick); 167 // get the next packet and try to send it 168 PacketPtr pkt = activeGenerator->getNextPacket(); 169 170 // suppress packets that are not destined for a memory, such as 171 // device accesses that could be part of a trace
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245 246 DPRINTF(TrafficGen, "Next event scheduled at %lld\n", nextEventTick); 247 248 // The next transition tick may be in the past if there was a 249 // retry, so ensure that we don't schedule anything in the past. 250 schedule(updateEvent, std::max(curTick(), nextEventTick)); 251} 252 253void 254BaseTrafficGen::start() 255{ 256 transition(); 257 scheduleUpdate(); 258} 259 260void 261BaseTrafficGen::recvReqRetry() 262{ 263 assert(retryPkt != NULL); 264 265 DPRINTF(TrafficGen, "Received retry\n"); 266 numRetries++; 267 // attempt to send the packet, and if we are successful start up 268 // the machinery again 269 if (port.sendTimingReq(retryPkt)) { 270 retryPkt = NULL; 271 // remember how much delay was incurred due to back-pressure 272 // when sending the request, we also use this to derive 273 // the tick for the next packet 274 Tick delay = curTick() - retryPktTick; 275 retryPktTick = 0; 276 retryTicks += delay; 277 278 if (drainState() != DrainState::Draining) { 279 // packet is sent, so find out when the next one is due 280 nextPacketTick = activeGenerator->nextPacketTick(elasticReq, 281 delay); 282 scheduleUpdate(); 283 } else { 284 // shut things down 285 nextPacketTick = MaxTick; 286 nextTransitionTick = MaxTick; 287 signalDrainDone(); 288 } 289 } 290} 291 292void 293BaseTrafficGen::noProgress() 294{ 295 fatal("BaseTrafficGen %s spent %llu ticks without making progress", 296 name(), progressCheck); 297} 298 299void 300BaseTrafficGen::regStats() 301{ 302 ClockedObject::regStats(); 303 304 // Initialise all the stats 305 using namespace Stats; 306 307 numPackets 308 .name(name() + ".numPackets") 309 .desc("Number of packets generated"); 310 311 numRetries 312 .name(name() + ".numRetries") 313 .desc("Number of retries"); 314 315 retryTicks 316 .name(name() + ".retryTicks") 317 .desc("Time spent waiting due to back-pressure (ticks)"); 318} 319 320std::shared_ptr<BaseGen> 321BaseTrafficGen::createIdle(Tick duration) 322{ 323 return std::shared_ptr<BaseGen>(new IdleGen(*this, duration)); 324} 325 326std::shared_ptr<BaseGen> 327BaseTrafficGen::createExit(Tick duration) 328{ 329 return std::shared_ptr<BaseGen>(new ExitGen(*this, duration)); 330} 331 332std::shared_ptr<BaseGen> 333BaseTrafficGen::createLinear(Tick duration, 334 Addr start_addr, Addr end_addr, Addr blocksize, 335 Tick min_period, Tick max_period, 336 uint8_t read_percent, Addr data_limit) 337{ 338 return std::shared_ptr<BaseGen>(new LinearGen(*this, 339 duration, start_addr, 340 end_addr, blocksize, 341 min_period, max_period, 342 read_percent, data_limit)); 343} 344 345std::shared_ptr<BaseGen> 346BaseTrafficGen::createRandom(Tick duration, 347 Addr start_addr, Addr end_addr, Addr blocksize, 348 Tick min_period, Tick max_period, 349 uint8_t read_percent, Addr data_limit) 350{ 351 return std::shared_ptr<BaseGen>(new RandomGen(*this, 352 duration, start_addr, 353 end_addr, blocksize, 354 min_period, max_period, 355 read_percent, data_limit)); 356} 357 358std::shared_ptr<BaseGen> 359BaseTrafficGen::createDram(Tick duration, 360 Addr start_addr, Addr end_addr, Addr blocksize, 361 Tick min_period, Tick max_period, 362 uint8_t read_percent, Addr data_limit, 363 unsigned int num_seq_pkts, unsigned int page_size, 364 unsigned int nbr_of_banks_DRAM, 365 unsigned int nbr_of_banks_util, 366 unsigned int addr_mapping, 367 unsigned int nbr_of_ranks) 368{ 369 return std::shared_ptr<BaseGen>(new DramGen(*this, 370 duration, start_addr, 371 end_addr, blocksize, 372 min_period, max_period, 373 read_percent, data_limit, 374 num_seq_pkts, page_size, 375 nbr_of_banks_DRAM, 376 nbr_of_banks_util, 377 addr_mapping, 378 nbr_of_ranks)); 379} 380 381std::shared_ptr<BaseGen> 382BaseTrafficGen::createDramRot(Tick duration, 383 Addr start_addr, Addr end_addr, Addr blocksize, 384 Tick min_period, Tick max_period, 385 uint8_t read_percent, Addr data_limit, 386 unsigned int num_seq_pkts, 387 unsigned int page_size, 388 unsigned int nbr_of_banks_DRAM, 389 unsigned int nbr_of_banks_util, 390 unsigned int addr_mapping, 391 unsigned int nbr_of_ranks, 392 unsigned int max_seq_count_per_rank) 393{ 394 return std::shared_ptr<BaseGen>(new DramRotGen(*this, 395 duration, start_addr, 396 end_addr, blocksize, 397 min_period, max_period, 398 read_percent, data_limit, 399 num_seq_pkts, page_size, 400 nbr_of_banks_DRAM, 401 nbr_of_banks_util, 402 addr_mapping, 403 nbr_of_ranks, 404 max_seq_count_per_rank)); 405} 406 407std::shared_ptr<BaseGen> 408BaseTrafficGen::createTrace(Tick duration, 409 const std::string& trace_file, Addr addr_offset) 410{ 411#if HAVE_PROTOBUF 412 return std::shared_ptr<BaseGen>( 413 new TraceGen(*this, duration, trace_file, addr_offset)); 414#else 415 panic("Can't instantiate trace generation without Protobuf support!\n"); 416#endif 417} 418 419bool 420BaseTrafficGen::TrafficGenPort::recvTimingResp(PacketPtr pkt) 421{ 422 delete pkt; 423 424 return true; 425}
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