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mem: Add memory footprint probe

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Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
This commit is contained in:
Rahul Thakur 2017-01-27 14:58:15 -06:00
parent 2974dc7a37
commit 32d05d5fb6
6 changed files with 282 additions and 0 deletions
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1
COPYING
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@ -45,3 +45,4 @@ Copyright (c) 1994-1996 Carnegie-Mellon University.
Copyright (c) 1993-1994 Christopher G. Demetriou
Copyright (c) 1997-2002 Makoto Matsumoto and Takuji Nishimura
Copyright (c) 1998,2001 Manuel Bouyer.
Copyright (c) 2016 Google Inc.

1
configs/dram/lat_mem_rd.py
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@ -252,6 +252,7 @@ system.tgen = TrafficGen(config_file = cfg_file_name,
# add a communication monitor
system.monitor = CommMonitor()
system.monitor.footprint = MemFootprintProbe()
# connect the traffic generator to the system
system.tgen.port = system.monitor.slave

48
src/mem/probes/MemFootprintProbe.py Normal file
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@ -0,0 +1,48 @@
# Copyright (c) 2016 Google Inc.
# All rights reserved.
#
# The license below extends only to copyright in the software and
# shall not be construed as granting a license to any other
# intellectual property including but not limited to intellectual
# 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
# entirety in all distributions of the software, modified or
# unmodified, in source code or in binary form.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# Authors: Rahul Thakur
from m5.params import *
from m5.proxy import *
from BaseMemProbe import BaseMemProbe
class MemFootprintProbe(BaseMemProbe):
type = "MemFootprintProbe"
cxx_header = "mem/probes/mem_footprint.hh"
system = Param.System(Parent.any,
"System pointer to get cache line and mem size")
page_size = Param.Unsigned(4096, "Page size for page-level footprint")

3
src/mem/probes/SConscript
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@ -45,6 +45,9 @@ Source('base.cc')
SimObject('StackDistProbe.py')
Source('stack_dist.cc')
SimObject('MemFootprintProbe.py')
Source('mem_footprint.cc')
# Packet tracing requires protobuf support
if env['HAVE_PROTOBUF']:
SimObject('MemTraceProbe.py')

132
src/mem/probes/mem_footprint.cc Normal file
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@ -0,0 +1,132 @@
/*
* Copyright (c) 2016 Google Inc.
* All rights reserved.
*
* The license below extends only to copyright in the software and
* shall not be construed as granting a license to any other
* intellectual property including but not limited to intellectual
* 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
* entirety in all distributions of the software, modified or
* unmodified, in source code or in binary form.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Rahul Thakur
*/
#include "mem/probes/mem_footprint.hh"
#include "base/intmath.hh"
#include "params/MemFootprintProbe.hh"
MemFootprintProbe::MemFootprintProbe(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)
{
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");
}
void
MemFootprintProbe::regStats()
{
BaseMemProbe::regStats();
using namespace Stats;
// clang-format off
fpCacheLine.name(name() + ".cacheline")
.desc("Memory footprint at cache line granularity")
.flags(nozero | nonan);
fpCacheLineTotal.name(name() + ".cacheline_total")
.desc("Total memory footprint at cache line granularity since "
"simulation begin")
.flags(nozero | nonan);
fpPage.name(name() + ".page")
.desc("Memory footprint at page granularity")
.flags(nozero | nonan);
fpPageTotal.name(name() + ".page_total")
.desc("Total memory footprint at page granularity since simulation "
"begin")
.flags(nozero | nonan);
// clang-format on
registerResetCallback(
new MakeCallback<MemFootprintProbe, &MemFootprintProbe::statReset>(
this));
}
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());
fpCacheLine = cacheLines.size() << cacheLineSizeLg2;
fpCacheLineTotal = cacheLinesAll.size() << cacheLineSizeLg2;
fpPage = pages.size() << pageSizeLg2;
fpPageTotal = pagesAll.size() << pageSizeLg2;
}
void
MemFootprintProbe::statReset()
{
cacheLines.clear();
pages.clear();
}
MemFootprintProbe *
MemFootprintProbeParams::create()
{
return new MemFootprintProbe(this);
}

97
src/mem/probes/mem_footprint.hh Normal file
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@ -0,0 +1,97 @@
/*
* Copyright (c) 2016 Google Inc.
* All rights reserved.
*
* The license below extends only to copyright in the software and
* shall not be construed as granting a license to any other
* intellectual property including but not limited to intellectual
* 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
* entirety in all distributions of the software, modified or
* unmodified, in source code or in binary form.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Rahul Thakur
*/
#ifndef __MEM_PROBES_MEM_FOOTPRINT_HH__
#define __MEM_PROBES_MEM_FOOTPRINT_HH__
#include <unordered_map>
#include "base/callback.hh"
#include "mem/packet.hh"
#include "mem/probes/base.hh"
#include "sim/stats.hh"
#include "sim/system.hh"
struct MemFootprintProbeParams;
/// Probe to track footprint of accessed memory
/// Two granularity of footprint measurement i.e. cache line and page
class MemFootprintProbe : public BaseMemProbe
{
public:
typedef std::unordered_set<Addr> AddrSet;
MemFootprintProbe(MemFootprintProbeParams *p);
void regStats() override;
// Fix footprint tracking state on stat reset
void statReset();
protected:
/// Cache Line size for footprint measurement (log2)
const uint8_t cacheLineSizeLg2;
/// Page size for footprint measurement (log2)
const uint8_t pageSizeLg2;
const uint64_t totalCacheLinesInMem;
const uint64_t totalPagesInMem;
void insertAddr(Addr addr, AddrSet *set, uint64_t limit);
void handleRequest(const ProbePoints::PacketInfo &pkt_info) override;
/// Footprint at cache line size granularity
Stats::Scalar fpCacheLine;
/// Footprint at cache line size granularity, since simulation begin
Stats::Scalar fpCacheLineTotal;
/// Footprint at page granularity
Stats::Scalar fpPage;
/// Footprint at page granularity, since simulation begin
Stats::Scalar fpPageTotal;
// Addr set to track unique cache lines accessed
AddrSet cacheLines;
// Addr set to track unique cache lines accessed since simulation begin
AddrSet cacheLinesAll;
// Addr set to track unique pages accessed
AddrSet pages;
// Addr set to track unique pages accessed since simulation begin
AddrSet pagesAll;
System *system;
};
#endif //__MEM_PROBES_MEM_FOOTPRINT_HH__