memtest.cc revision 8949
1/* 2 * Copyright (c) 2002-2005 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Erik Hallnor 29 * Steve Reinhardt 30 */ 31 32// FIX ME: make trackBlkAddr use blocksize from actual cache, not hard coded 33 34#include <iomanip> 35#include <set> 36#include <string> 37#include <vector> 38 39#include "base/misc.hh" 40#include "base/statistics.hh" 41#include "cpu/testers/memtest/memtest.hh" 42#include "debug/MemTest.hh" 43#include "mem/mem_object.hh" 44#include "mem/packet.hh" 45#include "mem/port.hh" 46#include "mem/request.hh" 47#include "sim/sim_events.hh" 48#include "sim/stats.hh" 49#include "sim/system.hh" 50 51using namespace std; 52 53int TESTER_ALLOCATOR=0; 54 55bool 56MemTest::CpuPort::recvTiming(PacketPtr pkt) 57{ 58 assert(pkt->isResponse()); 59 memtest->completeRequest(pkt); 60 return true; 61} 62 63void 64MemTest::CpuPort::recvRetry() 65{ 66 memtest->doRetry(); 67} 68 69void 70MemTest::sendPkt(PacketPtr pkt) { 71 if (atomic) { 72 cachePort.sendAtomic(pkt); 73 completeRequest(pkt); 74 } 75 else if (!cachePort.sendTiming(pkt)) { 76 DPRINTF(MemTest, "accessRetry setting to true\n"); 77 78 // 79 // dma requests should never be retried 80 // 81 if (issueDmas) { 82 panic("Nacked DMA requests are not supported\n"); 83 } 84 accessRetry = true; 85 retryPkt = pkt; 86 } else { 87 if (issueDmas) { 88 dmaOutstanding = true; 89 } 90 } 91 92} 93 94MemTest::MemTest(const Params *p) 95 : MemObject(p), 96 tickEvent(this), 97 cachePort("test", this), 98 funcPort("functional", this), 99 funcProxy(funcPort), 100 retryPkt(NULL), 101// mainMem(main_mem), 102// checkMem(check_mem), 103 size(p->memory_size), 104 percentReads(p->percent_reads), 105 percentFunctional(p->percent_functional), 106 percentUncacheable(p->percent_uncacheable), 107 issueDmas(p->issue_dmas), 108 masterId(p->sys->getMasterId(name())), 109 progressInterval(p->progress_interval), 110 nextProgressMessage(p->progress_interval), 111 percentSourceUnaligned(p->percent_source_unaligned), 112 percentDestUnaligned(p->percent_dest_unaligned), 113 maxLoads(p->max_loads), 114 atomic(p->atomic), 115 suppress_func_warnings(p->suppress_func_warnings) 116{ 117 id = TESTER_ALLOCATOR++; 118 119 // Needs to be masked off once we know the block size. 120 traceBlockAddr = p->trace_addr; 121 baseAddr1 = 0x100000; 122 baseAddr2 = 0x400000; 123 uncacheAddr = 0x800000; 124 125 // set up counters 126 noResponseCycles = 0; 127 numReads = 0; 128 numWrites = 0; 129 schedule(tickEvent, 0); 130 131 accessRetry = false; 132 dmaOutstanding = false; 133} 134 135MasterPort & 136MemTest::getMasterPort(const std::string &if_name, int idx) 137{ 138 if (if_name == "functional") 139 return funcPort; 140 else if (if_name == "test") 141 return cachePort; 142 else 143 return MemObject::getMasterPort(if_name, idx); 144} 145 146void 147MemTest::init() 148{ 149 // By the time init() is called, the ports should be hooked up. 150 blockSize = cachePort.peerBlockSize(); 151 blockAddrMask = blockSize - 1; 152 traceBlockAddr = blockAddr(traceBlockAddr); 153 154 // initial memory contents for both physical memory and functional 155 // memory should be 0; no need to initialize them. 156} 157 158 159void 160MemTest::completeRequest(PacketPtr pkt) 161{ 162 Request *req = pkt->req; 163 164 if (issueDmas) { 165 dmaOutstanding = false; 166 } 167 168 DPRINTF(MemTest, "completing %s at address %x (blk %x) %s\n", 169 pkt->isWrite() ? "write" : "read", 170 req->getPaddr(), blockAddr(req->getPaddr()), 171 pkt->isError() ? "error" : "success"); 172 173 MemTestSenderState *state = 174 dynamic_cast<MemTestSenderState *>(pkt->senderState); 175 176 uint8_t *data = state->data; 177 uint8_t *pkt_data = pkt->getPtr<uint8_t>(); 178 179 //Remove the address from the list of outstanding 180 std::set<unsigned>::iterator removeAddr = 181 outstandingAddrs.find(req->getPaddr()); 182 assert(removeAddr != outstandingAddrs.end()); 183 outstandingAddrs.erase(removeAddr); 184 185 if (pkt->isError()) { 186 if (!suppress_func_warnings) { 187 warn("Functional Access failed for %x at %x\n", 188 pkt->isWrite() ? "write" : "read", req->getPaddr()); 189 } 190 } else { 191 if (pkt->isRead()) { 192 if (memcmp(pkt_data, data, pkt->getSize()) != 0) { 193 panic("%s: read of %x (blk %x) @ cycle %d " 194 "returns %x, expected %x\n", name(), 195 req->getPaddr(), blockAddr(req->getPaddr()), curTick(), 196 *pkt_data, *data); 197 } 198 199 numReads++; 200 numReadsStat++; 201 202 if (numReads == (uint64_t)nextProgressMessage) { 203 ccprintf(cerr, "%s: completed %d read, %d write accesses @%d\n", 204 name(), numReads, numWrites, curTick()); 205 nextProgressMessage += progressInterval; 206 } 207 208 if (maxLoads != 0 && numReads >= maxLoads) 209 exitSimLoop("maximum number of loads reached"); 210 } else { 211 assert(pkt->isWrite()); 212 funcProxy.writeBlob(req->getPaddr(), pkt_data, req->getSize()); 213 numWrites++; 214 numWritesStat++; 215 } 216 } 217 218 noResponseCycles = 0; 219 delete state; 220 delete [] data; 221 delete pkt->req; 222 delete pkt; 223} 224 225void 226MemTest::regStats() 227{ 228 using namespace Stats; 229 230 numReadsStat 231 .name(name() + ".num_reads") 232 .desc("number of read accesses completed") 233 ; 234 235 numWritesStat 236 .name(name() + ".num_writes") 237 .desc("number of write accesses completed") 238 ; 239 240 numCopiesStat 241 .name(name() + ".num_copies") 242 .desc("number of copy accesses completed") 243 ; 244} 245 246void 247MemTest::tick() 248{ 249 if (!tickEvent.scheduled()) 250 schedule(tickEvent, curTick() + ticks(1)); 251 252 if (++noResponseCycles >= 500000) { 253 if (issueDmas) { 254 cerr << "DMA tester "; 255 } 256 cerr << name() << ": deadlocked at cycle " << curTick() << endl; 257 fatal(""); 258 } 259 260 if (accessRetry || (issueDmas && dmaOutstanding)) { 261 DPRINTF(MemTest, "MemTester waiting on accessRetry or DMA response\n"); 262 return; 263 } 264 265 //make new request 266 unsigned cmd = random() % 100; 267 unsigned offset = random() % size; 268 unsigned base = random() % 2; 269 uint64_t data = random(); 270 unsigned access_size = random() % 4; 271 bool uncacheable = (random() % 100) < percentUncacheable; 272 273 unsigned dma_access_size = random() % 4; 274 275 //If we aren't doing copies, use id as offset, and do a false sharing 276 //mem tester 277 //We can eliminate the lower bits of the offset, and then use the id 278 //to offset within the blks 279 offset = blockAddr(offset); 280 offset += id; 281 access_size = 0; 282 dma_access_size = 0; 283 284 Request *req = new Request(); 285 Request::Flags flags; 286 Addr paddr; 287 288 if (uncacheable) { 289 flags.set(Request::UNCACHEABLE); 290 paddr = uncacheAddr + offset; 291 } else { 292 paddr = ((base) ? baseAddr1 : baseAddr2) + offset; 293 } 294 bool do_functional = (random() % 100 < percentFunctional) && !uncacheable; 295 296 if (issueDmas) { 297 paddr &= ~((1 << dma_access_size) - 1); 298 req->setPhys(paddr, 1 << dma_access_size, flags, masterId); 299 req->setThreadContext(id,0); 300 } else { 301 paddr &= ~((1 << access_size) - 1); 302 req->setPhys(paddr, 1 << access_size, flags, masterId); 303 req->setThreadContext(id,0); 304 } 305 assert(req->getSize() == 1); 306 307 uint8_t *result = new uint8_t[8]; 308 309 if (cmd < percentReads) { 310 // read 311 312 // For now we only allow one outstanding request per address 313 // per tester This means we assume CPU does write forwarding 314 // to reads that alias something in the cpu store buffer. 315 if (outstandingAddrs.find(paddr) != outstandingAddrs.end()) { 316 delete [] result; 317 delete req; 318 return; 319 } 320 321 outstandingAddrs.insert(paddr); 322 323 // ***** NOTE FOR RON: I'm not sure how to access checkMem. - Kevin 324 funcProxy.readBlob(req->getPaddr(), result, req->getSize()); 325 326 DPRINTF(MemTest, 327 "id %d initiating %sread at addr %x (blk %x) expecting %x\n", 328 id, do_functional ? "functional " : "", req->getPaddr(), 329 blockAddr(req->getPaddr()), *result); 330 331 PacketPtr pkt = new Packet(req, MemCmd::ReadReq); 332 pkt->dataDynamicArray(new uint8_t[req->getSize()]); 333 MemTestSenderState *state = new MemTestSenderState(result); 334 pkt->senderState = state; 335 336 if (do_functional) { 337 assert(pkt->needsResponse()); 338 pkt->setSuppressFuncError(); 339 cachePort.sendFunctional(pkt); 340 completeRequest(pkt); 341 } else { 342 sendPkt(pkt); 343 } 344 } else { 345 // write 346 347 // For now we only allow one outstanding request per addreess 348 // per tester. This means we assume CPU does write forwarding 349 // to reads that alias something in the cpu store buffer. 350 if (outstandingAddrs.find(paddr) != outstandingAddrs.end()) { 351 delete [] result; 352 delete req; 353 return; 354 } 355 356 outstandingAddrs.insert(paddr); 357 358 DPRINTF(MemTest, "initiating %swrite at addr %x (blk %x) value %x\n", 359 do_functional ? "functional " : "", req->getPaddr(), 360 blockAddr(req->getPaddr()), data & 0xff); 361 362 PacketPtr pkt = new Packet(req, MemCmd::WriteReq); 363 uint8_t *pkt_data = new uint8_t[req->getSize()]; 364 pkt->dataDynamicArray(pkt_data); 365 memcpy(pkt_data, &data, req->getSize()); 366 MemTestSenderState *state = new MemTestSenderState(result); 367 pkt->senderState = state; 368 369 if (do_functional) { 370 pkt->setSuppressFuncError(); 371 cachePort.sendFunctional(pkt); 372 completeRequest(pkt); 373 } else { 374 sendPkt(pkt); 375 } 376 } 377} 378 379void 380MemTest::doRetry() 381{ 382 if (cachePort.sendTiming(retryPkt)) { 383 DPRINTF(MemTest, "accessRetry setting to false\n"); 384 accessRetry = false; 385 retryPkt = NULL; 386 } 387} 388 389 390void 391MemTest::printAddr(Addr a) 392{ 393 cachePort.printAddr(a); 394} 395 396 397MemTest * 398MemTestParams::create() 399{ 400 return new MemTest(this); 401} 402