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Diffstat (limited to 'src/mem/probes/mem_footprint.hh')
-rw-r--r-- | src/mem/probes/mem_footprint.hh | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/src/mem/probes/mem_footprint.hh b/src/mem/probes/mem_footprint.hh new file mode 100644 index 000000000..821d61ae1 --- /dev/null +++ b/src/mem/probes/mem_footprint.hh @@ -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__ |