mem: Add memory footprint probe
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
This commit is contained in:
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COPYING
1
COPYING
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@ -45,3 +45,4 @@ Copyright (c) 1994-1996 Carnegie-Mellon University.
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Copyright (c) 1993-1994 Christopher G. Demetriou
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Copyright (c) 1997-2002 Makoto Matsumoto and Takuji Nishimura
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Copyright (c) 1998,2001 Manuel Bouyer.
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Copyright (c) 2016 Google Inc.
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@ -252,6 +252,7 @@ system.tgen = TrafficGen(config_file = cfg_file_name,
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# add a communication monitor
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system.monitor = CommMonitor()
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system.monitor.footprint = MemFootprintProbe()
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# connect the traffic generator to the system
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system.tgen.port = system.monitor.slave
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48
src/mem/probes/MemFootprintProbe.py
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48
src/mem/probes/MemFootprintProbe.py
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@ -0,0 +1,48 @@
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# Copyright (c) 2016 Google Inc.
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# All rights reserved.
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#
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# The license below extends only to copyright in the software and
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# shall not be construed as granting a license to any other
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# intellectual property including but not limited to intellectual
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# property relating to a hardware implementation of the
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# functionality of the software licensed hereunder. You may use the
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# software subject to the license terms below provided that you
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# ensure that this notice is replicated unmodified and in its
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# entirety in all distributions of the software, modified or
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# unmodified, in source code or in binary form.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met: redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer;
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# redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution;
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# neither the name of the copyright holders nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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# Authors: Rahul Thakur
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from m5.params import *
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from m5.proxy import *
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from BaseMemProbe import BaseMemProbe
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class MemFootprintProbe(BaseMemProbe):
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type = "MemFootprintProbe"
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cxx_header = "mem/probes/mem_footprint.hh"
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system = Param.System(Parent.any,
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"System pointer to get cache line and mem size")
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page_size = Param.Unsigned(4096, "Page size for page-level footprint")
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@ -45,6 +45,9 @@ Source('base.cc')
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SimObject('StackDistProbe.py')
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Source('stack_dist.cc')
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SimObject('MemFootprintProbe.py')
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Source('mem_footprint.cc')
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# Packet tracing requires protobuf support
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if env['HAVE_PROTOBUF']:
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SimObject('MemTraceProbe.py')
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132
src/mem/probes/mem_footprint.cc
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132
src/mem/probes/mem_footprint.cc
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@ -0,0 +1,132 @@
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/*
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* Copyright (c) 2016 Google Inc.
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* All rights reserved.
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*
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* The license below extends only to copyright in the software and
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* shall not be construed as granting a license to any other
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* intellectual property including but not limited to intellectual
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* property relating to a hardware implementation of the
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* functionality of the software licensed hereunder. You may use the
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* software subject to the license terms below provided that you
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* ensure that this notice is replicated unmodified and in its
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* entirety in all distributions of the software, modified or
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* unmodified, in source code or in binary form.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Rahul Thakur
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*/
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#include "mem/probes/mem_footprint.hh"
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#include "base/intmath.hh"
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#include "params/MemFootprintProbe.hh"
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MemFootprintProbe::MemFootprintProbe(MemFootprintProbeParams *p)
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: BaseMemProbe(p),
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cacheLineSizeLg2(floorLog2(p->system->cacheLineSize())),
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pageSizeLg2(floorLog2(p->page_size)),
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totalCacheLinesInMem(p->system->memSize() / p->system->cacheLineSize()),
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totalPagesInMem(p->system->memSize() / p->page_size),
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cacheLines(),
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cacheLinesAll(),
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pages(),
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pagesAll(),
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system(p->system)
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{
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fatal_if(!isPowerOf2(system->cacheLineSize()),
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"MemFootprintProbe expects cache line size is power of 2.");
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fatal_if(!isPowerOf2(p->page_size),
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"MemFootprintProbe expects page size parameter is power of 2");
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}
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void
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MemFootprintProbe::regStats()
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{
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BaseMemProbe::regStats();
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using namespace Stats;
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// clang-format off
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fpCacheLine.name(name() + ".cacheline")
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.desc("Memory footprint at cache line granularity")
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.flags(nozero | nonan);
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fpCacheLineTotal.name(name() + ".cacheline_total")
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.desc("Total memory footprint at cache line granularity since "
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"simulation begin")
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.flags(nozero | nonan);
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fpPage.name(name() + ".page")
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.desc("Memory footprint at page granularity")
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.flags(nozero | nonan);
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fpPageTotal.name(name() + ".page_total")
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.desc("Total memory footprint at page granularity since simulation "
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"begin")
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.flags(nozero | nonan);
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// clang-format on
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registerResetCallback(
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new MakeCallback<MemFootprintProbe, &MemFootprintProbe::statReset>(
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this));
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}
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void
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MemFootprintProbe::insertAddr(Addr addr, AddrSet *set, uint64_t limit)
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{
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set->insert(addr);
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assert(set->size() <= limit);
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}
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void
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MemFootprintProbe::handleRequest(const ProbePoints::PacketInfo &pi)
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{
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if (!pi.cmd.isRequest() || !system->isMemAddr(pi.addr))
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return;
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const Addr cl_addr = (pi.addr >> cacheLineSizeLg2) << cacheLineSizeLg2;
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const Addr page_addr = (pi.addr >> pageSizeLg2) << pageSizeLg2;
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insertAddr(cl_addr, &cacheLines, totalCacheLinesInMem);
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insertAddr(cl_addr, &cacheLinesAll, totalCacheLinesInMem);
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insertAddr(page_addr, &pages, totalPagesInMem);
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insertAddr(page_addr, &pagesAll, totalPagesInMem);
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assert(cacheLines.size() <= cacheLinesAll.size());
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assert(pages.size() <= pagesAll.size());
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fpCacheLine = cacheLines.size() << cacheLineSizeLg2;
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fpCacheLineTotal = cacheLinesAll.size() << cacheLineSizeLg2;
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fpPage = pages.size() << pageSizeLg2;
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fpPageTotal = pagesAll.size() << pageSizeLg2;
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}
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void
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MemFootprintProbe::statReset()
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{
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cacheLines.clear();
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pages.clear();
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}
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MemFootprintProbe *
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MemFootprintProbeParams::create()
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{
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return new MemFootprintProbe(this);
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}
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97
src/mem/probes/mem_footprint.hh
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97
src/mem/probes/mem_footprint.hh
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@ -0,0 +1,97 @@
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/*
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* Copyright (c) 2016 Google Inc.
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* All rights reserved.
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*
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* The license below extends only to copyright in the software and
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* shall not be construed as granting a license to any other
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* intellectual property including but not limited to intellectual
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* property relating to a hardware implementation of the
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* functionality of the software licensed hereunder. You may use the
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* software subject to the license terms below provided that you
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* ensure that this notice is replicated unmodified and in its
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* entirety in all distributions of the software, modified or
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* unmodified, in source code or in binary form.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Rahul Thakur
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*/
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#ifndef __MEM_PROBES_MEM_FOOTPRINT_HH__
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#define __MEM_PROBES_MEM_FOOTPRINT_HH__
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#include <unordered_map>
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#include "base/callback.hh"
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#include "mem/packet.hh"
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#include "mem/probes/base.hh"
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#include "sim/stats.hh"
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#include "sim/system.hh"
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struct MemFootprintProbeParams;
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/// Probe to track footprint of accessed memory
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/// Two granularity of footprint measurement i.e. cache line and page
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class MemFootprintProbe : public BaseMemProbe
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{
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public:
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typedef std::unordered_set<Addr> AddrSet;
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MemFootprintProbe(MemFootprintProbeParams *p);
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void regStats() override;
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// Fix footprint tracking state on stat reset
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void statReset();
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protected:
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/// Cache Line size for footprint measurement (log2)
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const uint8_t cacheLineSizeLg2;
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/// Page size for footprint measurement (log2)
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const uint8_t pageSizeLg2;
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const uint64_t totalCacheLinesInMem;
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const uint64_t totalPagesInMem;
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void insertAddr(Addr addr, AddrSet *set, uint64_t limit);
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void handleRequest(const ProbePoints::PacketInfo &pkt_info) override;
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/// Footprint at cache line size granularity
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Stats::Scalar fpCacheLine;
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/// Footprint at cache line size granularity, since simulation begin
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Stats::Scalar fpCacheLineTotal;
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/// Footprint at page granularity
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Stats::Scalar fpPage;
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/// Footprint at page granularity, since simulation begin
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Stats::Scalar fpPageTotal;
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// Addr set to track unique cache lines accessed
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AddrSet cacheLines;
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// Addr set to track unique cache lines accessed since simulation begin
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AddrSet cacheLinesAll;
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// Addr set to track unique pages accessed
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AddrSet pages;
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// Addr set to track unique pages accessed since simulation begin
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AddrSet pagesAll;
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System *system;
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};
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#endif //__MEM_PROBES_MEM_FOOTPRINT_HH__
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