base.cc revision 12703
15390SN/A/* 25443SN/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 3111793Sbrandon.potter@amd.com * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 3211793Sbrandon.potter@amd.com * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 336216Snate@binkert.org * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 345636SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 355446SN/A * 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. 395636SN/A * 405636SN/A * Authors: Erik Hallnor 415643Sgblack@eecs.umich.edu * Ron Dreslinski 425390SN/A */ 435446SN/A 445638Sgblack@eecs.umich.edu/** 455446SN/A * @file 465446SN/A * Definitions of BaseTags. 475390SN/A */ 485390SN/A 495390SN/A#include "mem/cache/tags/base.hh" 505390SN/A 515390SN/A#include "mem/cache/base.hh" 525390SN/A#include "sim/sim_exit.hh" 535390SN/A 54BaseTags::BaseTags(const Params *p) 55 : ClockedObject(p), blkSize(p->block_size), blkMask(blkSize - 1), 56 size(p->size), 57 lookupLatency(p->tag_latency), 58 accessLatency(p->sequential_access ? 59 p->tag_latency + p->data_latency : 60 std::max(p->tag_latency, p->data_latency)), 61 cache(nullptr), 62 warmupBound((p->warmup_percentage/100.0) * (p->size / p->block_size)), 63 warmedUp(false), numBlocks(p->size / p->block_size), 64 dataBlks(new uint8_t[p->size]) // Allocate data storage in one big chunk 65{ 66} 67 68void 69BaseTags::setCache(BaseCache *_cache) 70{ 71 assert(!cache); 72 cache = _cache; 73} 74 75void 76BaseTags::insertBlock(PacketPtr pkt, CacheBlk *blk) 77{ 78 // Get address 79 Addr addr = pkt->getAddr(); 80 81 // If we're replacing a block that was previously valid update 82 // stats for it. This can't be done in findBlock() because a 83 // found block might not actually be replaced there if the 84 // coherence protocol says it can't be. 85 if (blk->isValid()) { 86 totalRefs += blk->refCount; 87 ++sampledRefs; 88 89 invalidate(blk); 90 blk->invalidate(); 91 } 92 93 // Previous block, if existed, has been removed, and now we have 94 // to insert the new one 95 96 // Deal with what we are bringing in 97 MasterID master_id = pkt->req->masterId(); 98 assert(master_id < cache->system->maxMasters()); 99 occupancies[master_id]++; 100 101 // Insert block with tag, src master id and task id 102 blk->insert(extractTag(addr), pkt->isSecure(), master_id, 103 pkt->req->taskId()); 104 105 tagsInUse++; 106 if (!warmedUp && tagsInUse.value() >= warmupBound) { 107 warmedUp = true; 108 warmupCycle = curTick(); 109 } 110 111 // We only need to write into one tag and one data block. 112 tagAccesses += 1; 113 dataAccesses += 1; 114} 115 116void 117BaseTags::regStats() 118{ 119 ClockedObject::regStats(); 120 121 using namespace Stats; 122 123 tagsInUse 124 .name(name() + ".tagsinuse") 125 .desc("Cycle average of tags in use") 126 ; 127 128 totalRefs 129 .name(name() + ".total_refs") 130 .desc("Total number of references to valid blocks.") 131 ; 132 133 sampledRefs 134 .name(name() + ".sampled_refs") 135 .desc("Sample count of references to valid blocks.") 136 ; 137 138 avgRefs 139 .name(name() + ".avg_refs") 140 .desc("Average number of references to valid blocks.") 141 ; 142 143 avgRefs = totalRefs/sampledRefs; 144 145 warmupCycle 146 .name(name() + ".warmup_cycle") 147 .desc("Cycle when the warmup percentage was hit.") 148 ; 149 150 occupancies 151 .init(cache->system->maxMasters()) 152 .name(name() + ".occ_blocks") 153 .desc("Average occupied blocks per requestor") 154 .flags(nozero | nonan) 155 ; 156 for (int i = 0; i < cache->system->maxMasters(); i++) { 157 occupancies.subname(i, cache->system->getMasterName(i)); 158 } 159 160 avgOccs 161 .name(name() + ".occ_percent") 162 .desc("Average percentage of cache occupancy") 163 .flags(nozero | total) 164 ; 165 for (int i = 0; i < cache->system->maxMasters(); i++) { 166 avgOccs.subname(i, cache->system->getMasterName(i)); 167 } 168 169 avgOccs = occupancies / Stats::constant(numBlocks); 170 171 occupanciesTaskId 172 .init(ContextSwitchTaskId::NumTaskId) 173 .name(name() + ".occ_task_id_blocks") 174 .desc("Occupied blocks per task id") 175 .flags(nozero | nonan) 176 ; 177 178 ageTaskId 179 .init(ContextSwitchTaskId::NumTaskId, 5) 180 .name(name() + ".age_task_id_blocks") 181 .desc("Occupied blocks per task id") 182 .flags(nozero | nonan) 183 ; 184 185 percentOccsTaskId 186 .name(name() + ".occ_task_id_percent") 187 .desc("Percentage of cache occupancy per task id") 188 .flags(nozero) 189 ; 190 191 percentOccsTaskId = occupanciesTaskId / Stats::constant(numBlocks); 192 193 tagAccesses 194 .name(name() + ".tag_accesses") 195 .desc("Number of tag accesses") 196 ; 197 198 dataAccesses 199 .name(name() + ".data_accesses") 200 .desc("Number of data accesses") 201 ; 202 203 registerDumpCallback(new BaseTagsDumpCallback(this)); 204 registerExitCallback(new BaseTagsCallback(this)); 205} 206