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/*
* 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_set>
#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__
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