base.cc revision 12727
15390SN/A/* 25445SN/A * Copyright (c) 2013,2016 ARM Limited 35390SN/A * All rights reserved. 45390SN/A * 55390SN/A * The license below extends only to copyright in the software and shall 65390SN/A * not be construed as granting a license to any other intellectual 75390SN/A * property including but not limited to intellectual property relating 85390SN/A * to a hardware implementation of the functionality of the software 95390SN/A * licensed hereunder. You may use the software subject to the license 105390SN/A * terms below provided that you ensure that this notice is replicated 115390SN/A * unmodified and in its entirety in all distributions of the software, 125390SN/A * modified or unmodified, in source code or in binary form. 135390SN/A * 145390SN/A * Copyright (c) 2003-2005 The Regents of The University of Michigan 155390SN/A * All rights reserved. 165390SN/A * 175390SN/A * Redistribution and use in source and binary forms, with or without 185390SN/A * modification, are permitted provided that the following conditions are 195390SN/A * met: redistributions of source code must retain the above copyright 205390SN/A * notice, this list of conditions and the following disclaimer; 215390SN/A * redistributions in binary form must reproduce the above copyright 225390SN/A * notice, this list of conditions and the following disclaimer in the 235390SN/A * documentation and/or other materials provided with the distribution; 245390SN/A * neither the name of the copyright holders nor the names of its 255390SN/A * contributors may be used to endorse or promote products derived from 265390SN/A * this software without specific prior written permission. 275390SN/A * 285390SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 295390SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 305390SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 315636Sgblack@eecs.umich.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 325636Sgblack@eecs.umich.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 335390SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 345636Sgblack@eecs.umich.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 355636Sgblack@eecs.umich.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 365390SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 375390SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 385390SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 395390SN/A * 405445SN/A * Authors: Erik Hallnor 415445SN/A * Ron Dreslinski 425636Sgblack@eecs.umich.edu */ 435390SN/A 445445SN/A/** 455636Sgblack@eecs.umich.edu * @file 465636Sgblack@eecs.umich.edu * Definitions of BaseTags. 475445SN/A */ 485445SN/A 495445SN/A#include "mem/cache/tags/base.hh" 505445SN/A 515445SN/A#include <cassert> 525445SN/A 535445SN/A#include "base/types.hh" 545445SN/A#include "mem/cache/base.hh" 555445SN/A#include "mem/packet.hh" 565445SN/A#include "mem/request.hh" 575390SN/A#include "sim/core.hh" 585636Sgblack@eecs.umich.edu#include "sim/sim_exit.hh" 595390SN/A#include "sim/system.hh" 605636Sgblack@eecs.umich.edu 615636Sgblack@eecs.umich.eduBaseTags::BaseTags(const Params *p) 625636Sgblack@eecs.umich.edu : ClockedObject(p), blkSize(p->block_size), blkMask(blkSize - 1), 635636Sgblack@eecs.umich.edu size(p->size), 645636Sgblack@eecs.umich.edu lookupLatency(p->tag_latency), 655636Sgblack@eecs.umich.edu accessLatency(p->sequential_access ? 665636Sgblack@eecs.umich.edu p->tag_latency + p->data_latency : 675826Sgblack@eecs.umich.edu std::max(p->tag_latency, p->data_latency)), 685636Sgblack@eecs.umich.edu cache(nullptr), 695636Sgblack@eecs.umich.edu warmupBound((p->warmup_percentage/100.0) * (p->size / p->block_size)), 705636Sgblack@eecs.umich.edu warmedUp(false), numBlocks(p->size / p->block_size), 715390SN/A dataBlks(new uint8_t[p->size]) // Allocate data storage in one big chunk 725390SN/A{ 735390SN/A} 745390SN/A 757903Shestness@cs.utexas.eduvoid 767903Shestness@cs.utexas.eduBaseTags::setCache(BaseCache *_cache) 777903Shestness@cs.utexas.edu{ 787903Shestness@cs.utexas.edu assert(!cache); 795390SN/A cache = _cache; 805390SN/A} 817811Ssteve.reinhardt@amd.com 825390SN/Avoid 835636Sgblack@eecs.umich.eduBaseTags::insertBlock(PacketPtr pkt, CacheBlk *blk) 84{ 85 assert(!blk->isValid()); 86 87 // Get address 88 Addr addr = pkt->getAddr(); 89 90 // Previous block, if existed, has been removed, and now we have 91 // to insert the new one 92 93 // Deal with what we are bringing in 94 MasterID master_id = pkt->req->masterId(); 95 assert(master_id < cache->system->maxMasters()); 96 occupancies[master_id]++; 97 98 // Insert block with tag, src master id and task id 99 blk->insert(extractTag(addr), pkt->isSecure(), master_id, 100 pkt->req->taskId()); 101 102 tagsInUse++; 103 if (!warmedUp && tagsInUse.value() >= warmupBound) { 104 warmedUp = true; 105 warmupCycle = curTick(); 106 } 107 108 // We only need to write into one tag and one data block. 109 tagAccesses += 1; 110 dataAccesses += 1; 111} 112 113void 114BaseTags::regStats() 115{ 116 ClockedObject::regStats(); 117 118 using namespace Stats; 119 120 tagsInUse 121 .name(name() + ".tagsinuse") 122 .desc("Cycle average of tags in use") 123 ; 124 125 totalRefs 126 .name(name() + ".total_refs") 127 .desc("Total number of references to valid blocks.") 128 ; 129 130 sampledRefs 131 .name(name() + ".sampled_refs") 132 .desc("Sample count of references to valid blocks.") 133 ; 134 135 avgRefs 136 .name(name() + ".avg_refs") 137 .desc("Average number of references to valid blocks.") 138 ; 139 140 avgRefs = totalRefs/sampledRefs; 141 142 warmupCycle 143 .name(name() + ".warmup_cycle") 144 .desc("Cycle when the warmup percentage was hit.") 145 ; 146 147 occupancies 148 .init(cache->system->maxMasters()) 149 .name(name() + ".occ_blocks") 150 .desc("Average occupied blocks per requestor") 151 .flags(nozero | nonan) 152 ; 153 for (int i = 0; i < cache->system->maxMasters(); i++) { 154 occupancies.subname(i, cache->system->getMasterName(i)); 155 } 156 157 avgOccs 158 .name(name() + ".occ_percent") 159 .desc("Average percentage of cache occupancy") 160 .flags(nozero | total) 161 ; 162 for (int i = 0; i < cache->system->maxMasters(); i++) { 163 avgOccs.subname(i, cache->system->getMasterName(i)); 164 } 165 166 avgOccs = occupancies / Stats::constant(numBlocks); 167 168 occupanciesTaskId 169 .init(ContextSwitchTaskId::NumTaskId) 170 .name(name() + ".occ_task_id_blocks") 171 .desc("Occupied blocks per task id") 172 .flags(nozero | nonan) 173 ; 174 175 ageTaskId 176 .init(ContextSwitchTaskId::NumTaskId, 5) 177 .name(name() + ".age_task_id_blocks") 178 .desc("Occupied blocks per task id") 179 .flags(nozero | nonan) 180 ; 181 182 percentOccsTaskId 183 .name(name() + ".occ_task_id_percent") 184 .desc("Percentage of cache occupancy per task id") 185 .flags(nozero) 186 ; 187 188 percentOccsTaskId = occupanciesTaskId / Stats::constant(numBlocks); 189 190 tagAccesses 191 .name(name() + ".tag_accesses") 192 .desc("Number of tag accesses") 193 ; 194 195 dataAccesses 196 .name(name() + ".data_accesses") 197 .desc("Number of data accesses") 198 ; 199 200 registerDumpCallback(new BaseTagsDumpCallback(this)); 201 registerExitCallback(new BaseTagsCallback(this)); 202} 203