src/mem/cache/tags/base.cc

   1 /*
   2  * Copyright (c) 2013 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  * Copyright (c) 2003-2005 The Regents of The University of Michigan
  15  * All rights reserved.
  16  *
  17  * Redistribution and use in source and binary forms, with or without
  18  * modification, are permitted provided that the following conditions are
  19  * met: redistributions of source code must retain the above copyright
  20  * notice, this list of conditions and the following disclaimer;
  21  * redistributions in binary form must reproduce the above copyright
  22  * notice, this list of conditions and the following disclaimer in the
  23  * documentation and/or other materials provided with the distribution;
  24  * neither the name of the copyright holders nor the names of its
  25  * contributors may be used to endorse or promote products derived from
  26  * this software without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  29  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  30  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  31  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  32  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  33  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  34  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  35  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  36  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  37  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  38  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  39  *
  40  * Authors: Erik Hallnor
  41  *          Ron Dreslinski
  42  */
  43
  44 /**
  45  * @file
  46  * Definitions of BaseTags.
  47  */
  48
  49 #include "mem/cache/tags/base.hh"
  50
  51 #include "cpu/smt.hh" //maxThreadsPerCPU
  52 #include "mem/cache/base.hh"
  53 #include "sim/sim_exit.hh"
  54
  55 using namespace std;
  56
  57 BaseTags::BaseTags(const Params *p)
  58     : ClockedObject(p), blkSize(p->block_size), size(p->size),
  59       accessLatency(p->hit_latency), cache(nullptr), warmupBound(0),
  60       warmedUp(false), numBlocks(0)
  61 {
  62 }
  63
  64 void
  65 BaseTags::setCache(BaseCache *_cache)
  66 {
  67     assert(!cache);
  68     cache = _cache;
  69 }
  70
  71 void
  72 BaseTags::regStats()
  73 {
  74     ClockedObject::regStats();
  75
  76     using namespace Stats;
  77
  78     replacements
  79         .init(maxThreadsPerCPU)
  80         .name(name() + ".replacements")
  81         .desc("number of replacements")
  82         .flags(total)
  83         ;
  84
  85     tagsInUse
  86         .name(name() + ".tagsinuse")
  87         .desc("Cycle average of tags in use")
  88         ;
  89
  90     totalRefs
  91         .name(name() + ".total_refs")
  92         .desc("Total number of references to valid blocks.")
  93         ;
  94
  95     sampledRefs
  96         .name(name() + ".sampled_refs")
  97         .desc("Sample count of references to valid blocks.")
  98         ;
  99
 100     avgRefs
 101         .name(name() + ".avg_refs")
 102         .desc("Average number of references to valid blocks.")
 103         ;
 104
 105     avgRefs = totalRefs/sampledRefs;
 106
 107     warmupCycle
 108         .name(name() + ".warmup_cycle")
 109         .desc("Cycle when the warmup percentage was hit.")
 110         ;
 111
 112     occupancies
 113         .init(cache->system->maxMasters())
 114         .name(name() + ".occ_blocks")
 115         .desc("Average occupied blocks per requestor")
 116         .flags(nozero | nonan)
 117         ;
 118     for (int i = 0; i < cache->system->maxMasters(); i++) {
 119         occupancies.subname(i, cache->system->getMasterName(i));
 120     }
 121
 122     avgOccs
 123         .name(name() + ".occ_percent")
 124         .desc("Average percentage of cache occupancy")
 125         .flags(nozero | total)
 126         ;
 127     for (int i = 0; i < cache->system->maxMasters(); i++) {
 128         avgOccs.subname(i, cache->system->getMasterName(i));
 129     }
 130
 131     avgOccs = occupancies / Stats::constant(numBlocks);
 132
 133     occupanciesTaskId
 134         .init(ContextSwitchTaskId::NumTaskId)
 135         .name(name() + ".occ_task_id_blocks")
 136         .desc("Occupied blocks per task id")
 137         .flags(nozero | nonan)
 138         ;
 139
 140     ageTaskId
 141         .init(ContextSwitchTaskId::NumTaskId, 5)
 142         .name(name() + ".age_task_id_blocks")
 143         .desc("Occupied blocks per task id")
 144         .flags(nozero | nonan)
 145         ;
 146
 147     percentOccsTaskId
 148         .name(name() + ".occ_task_id_percent")
 149         .desc("Percentage of cache occupancy per task id")
 150         .flags(nozero)
 151         ;
 152
 153     percentOccsTaskId = occupanciesTaskId / Stats::constant(numBlocks);
 154
 155     tagAccesses
 156         .name(name() + ".tag_accesses")
 157         .desc("Number of tag accesses")
 158         ;
 159
 160     dataAccesses
 161         .name(name() + ".data_accesses")
 162         .desc("Number of data accesses")
 163         ;
 164
 165     registerDumpCallback(new BaseTagsDumpCallback(this));
 166     registerExitCallback(new BaseTagsCallback(this));
 167 }