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/*
* Copyright (c) 2016 Google Inc.
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*
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* property relating to a hardware implementation of the
* functionality of the software licensed hereunder. You may use the
* software subject to the license terms below provided that you
* ensure that this notice is replicated unmodified and in its
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*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#include "mem/probes/mem_footprint.hh"
#include "base/intmath.hh"
#include "params/MemFootprintProbe.hh"
MemFootprintProbe::MemFootprintProbe(const MemFootprintProbeParams &p)
: BaseMemProbe(p),
cacheLineSizeLg2(floorLog2(p.system->cacheLineSize())),
pageSizeLg2(floorLog2(p.page_size)),
totalCacheLinesInMem(p.system->memSize() / p.system->cacheLineSize()),
totalPagesInMem(p.system->memSize() / p.page_size),
cacheLines(),
cacheLinesAll(),
pages(),
pagesAll(),
system(p.system),
stats(this)
{
fatal_if(!isPowerOf2(system->cacheLineSize()),
"MemFootprintProbe expects cache line size is power of 2.");
fatal_if(!isPowerOf2(p.page_size),
"MemFootprintProbe expects page size parameter is power of 2");
}
MemFootprintProbe::
MemFootprintProbeStats::MemFootprintProbeStats(MemFootprintProbe *parent)
: Stats::Group(parent),
ADD_STAT(cacheLine, UNIT_COUNT,
"Memory footprint at cache line granularity"),
ADD_STAT(cacheLineTotal, UNIT_COUNT,
"Total memory footprint at cache line granularity since "
"simulation begin"),
ADD_STAT(page, UNIT_COUNT, "Memory footprint at page granularity"),
ADD_STAT(pageTotal, UNIT_COUNT,
"Total memory footprint at page granularity since simulation "
"begin")
{
using namespace Stats;
// clang-format off
cacheLine.flags(nozero | nonan);
cacheLineTotal.flags(nozero | nonan);
page.flags(nozero | nonan);
pageTotal.flags(nozero | nonan);
// clang-format on
registerResetCallback([parent]() { parent->statReset(); });
}
void
MemFootprintProbe::insertAddr(Addr addr, AddrSet *set, uint64_t limit)
{
set->insert(addr);
assert(set->size() <= limit);
}
void
MemFootprintProbe::handleRequest(const ProbePoints::PacketInfo &pi)
{
if (!pi.cmd.isRequest() || !system->isMemAddr(pi.addr))
return;
const Addr cl_addr = (pi.addr >> cacheLineSizeLg2) << cacheLineSizeLg2;
const Addr page_addr = (pi.addr >> pageSizeLg2) << pageSizeLg2;
insertAddr(cl_addr, &cacheLines, totalCacheLinesInMem);
insertAddr(cl_addr, &cacheLinesAll, totalCacheLinesInMem);
insertAddr(page_addr, &pages, totalPagesInMem);
insertAddr(page_addr, &pagesAll, totalPagesInMem);
assert(cacheLines.size() <= cacheLinesAll.size());
assert(pages.size() <= pagesAll.size());
stats.cacheLine = cacheLines.size() << cacheLineSizeLg2;
stats.cacheLineTotal = cacheLinesAll.size() << cacheLineSizeLg2;
stats.page = pages.size() << pageSizeLg2;
stats.pageTotal = pagesAll.size() << pageSizeLg2;
}
void
MemFootprintProbe::statReset()
{
cacheLines.clear();
pages.clear();
}