base.cc

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 * property including but not limited to intellectual property relating
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 * met: redistributions of source code must retain the above copyright
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 * this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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 * Authors: Erik Hallnor
 *          Ron Dreslinski
 */

#include "mem/cache/tags/base.hh"

#include "cpu/smt.hh" //maxThreadsPerCPU
#include "mem/cache/base.hh"
#include "sim/sim_exit.hh"

using namespace std;

BaseTags::BaseTags(const Params *p)
    : ClockedObject(p), blkSize(p->block_size), blkMask(blkSize - 1),
      size(p->size),
      lookupLatency(p->tag_latency),
      accessLatency(p->sequential_access ?
                    p->tag_latency + p->data_latency :
                    std::max(p->tag_latency, p->data_latency)),
      cache(nullptr), warmupBound(0),
      warmedUp(false), numBlocks(0)
{
}

void
BaseTags::setCache(BaseCache *_cache)
{
    assert(!cache);
    cache = _cache;
}

void
BaseTags::regStats()
{
    ClockedObject::regStats();

    using namespace Stats;

    replacements
        .init(maxThreadsPerCPU)
        .name(name() + ".replacements")
        .desc("number of replacements")
        .flags(total)
        ;

    tagsInUse
        .name(name() + ".tagsinuse")
        .desc("Cycle average of tags in use")
        ;

    totalRefs
        .name(name() + ".total_refs")
        .desc("Total number of references to valid blocks.")
        ;

    sampledRefs
        .name(name() + ".sampled_refs")
        .desc("Sample count of references to valid blocks.")
        ;

    avgRefs
        .name(name() + ".avg_refs")
        .desc("Average number of references to valid blocks.")
        ;

    avgRefs = totalRefs/sampledRefs;

    warmupCycle
        .name(name() + ".warmup_cycle")
        .desc("Cycle when the warmup percentage was hit.")
        ;

    occupancies
        .init(cache->system->maxMasters())
        .name(name() + ".occ_blocks")
        .desc("Average occupied blocks per requestor")
        .flags(nozero | nonan)
        ;
    for (int i = 0; i < cache->system->maxMasters(); i++) {
        occupancies.subname(i, cache->system->getMasterName(i));
    }

    avgOccs
        .name(name() + ".occ_percent")
        .desc("Average percentage of cache occupancy")
        .flags(nozero | total)
        ;
    for (int i = 0; i < cache->system->maxMasters(); i++) {
        avgOccs.subname(i, cache->system->getMasterName(i));
    }

    avgOccs = occupancies / Stats::constant(numBlocks);

    occupanciesTaskId
        .init(ContextSwitchTaskId::NumTaskId)
        .name(name() + ".occ_task_id_blocks")
        .desc("Occupied blocks per task id")
        .flags(nozero | nonan)
        ;

    ageTaskId
        .init(ContextSwitchTaskId::NumTaskId, 5)
        .name(name() + ".age_task_id_blocks")
        .desc("Occupied blocks per task id")
        .flags(nozero | nonan)
        ;

    percentOccsTaskId
        .name(name() + ".occ_task_id_percent")
        .desc("Percentage of cache occupancy per task id")
        .flags(nozero)
        ;

    percentOccsTaskId = occupanciesTaskId / Stats::constant(numBlocks);

    tagAccesses
        .name(name() + ".tag_accesses")
        .desc("Number of tag accesses")
        ;

    dataAccesses
        .name(name() + ".data_accesses")
        .desc("Number of data accesses")
        ;

    registerDumpCallback(new BaseTagsDumpCallback(this));
    registerExitCallback(new BaseTagsCallback(this));
}