Prefetcher.py revision 13991
113991Sandreas.sandberg@arm.com# Copyright (c) 2012, 2014, 2019 ARM Limited 29288Sandreas.hansson@arm.com# All rights reserved. 39288Sandreas.hansson@arm.com# 49288Sandreas.hansson@arm.com# The license below extends only to copyright in the software and shall 59288Sandreas.hansson@arm.com# not be construed as granting a license to any other intellectual 69288Sandreas.hansson@arm.com# property including but not limited to intellectual property relating 79288Sandreas.hansson@arm.com# to a hardware implementation of the functionality of the software 89288Sandreas.hansson@arm.com# licensed hereunder. You may use the software subject to the license 99288Sandreas.hansson@arm.com# terms below provided that you ensure that this notice is replicated 109288Sandreas.hansson@arm.com# unmodified and in its entirety in all distributions of the software, 119288Sandreas.hansson@arm.com# modified or unmodified, in source code or in binary form. 129288Sandreas.hansson@arm.com# 139288Sandreas.hansson@arm.com# Copyright (c) 2005 The Regents of The University of Michigan 149288Sandreas.hansson@arm.com# All rights reserved. 159288Sandreas.hansson@arm.com# 169288Sandreas.hansson@arm.com# Redistribution and use in source and binary forms, with or without 179288Sandreas.hansson@arm.com# modification, are permitted provided that the following conditions are 189288Sandreas.hansson@arm.com# met: redistributions of source code must retain the above copyright 199288Sandreas.hansson@arm.com# notice, this list of conditions and the following disclaimer; 209288Sandreas.hansson@arm.com# redistributions in binary form must reproduce the above copyright 219288Sandreas.hansson@arm.com# notice, this list of conditions and the following disclaimer in the 229288Sandreas.hansson@arm.com# documentation and/or other materials provided with the distribution; 239288Sandreas.hansson@arm.com# neither the name of the copyright holders nor the names of its 249288Sandreas.hansson@arm.com# contributors may be used to endorse or promote products derived from 259288Sandreas.hansson@arm.com# this software without specific prior written permission. 269288Sandreas.hansson@arm.com# 279288Sandreas.hansson@arm.com# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 289288Sandreas.hansson@arm.com# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 299288Sandreas.hansson@arm.com# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 309288Sandreas.hansson@arm.com# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 319288Sandreas.hansson@arm.com# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 329288Sandreas.hansson@arm.com# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 339288Sandreas.hansson@arm.com# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 349288Sandreas.hansson@arm.com# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 359288Sandreas.hansson@arm.com# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 369288Sandreas.hansson@arm.com# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 379288Sandreas.hansson@arm.com# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 389288Sandreas.hansson@arm.com# 399288Sandreas.hansson@arm.com# Authors: Ron Dreslinski 4010623Smitch.hayenga@arm.com# Mitch Hayenga 419288Sandreas.hansson@arm.com 4213416Sjavier.bueno@metempsy.comfrom m5.SimObject import * 438831Smrinmoy.ghosh@arm.comfrom m5.params import * 448832SAli.Saidi@ARM.comfrom m5.proxy import * 4513665Sandreas.sandberg@arm.com 4613665Sandreas.sandberg@arm.comfrom m5.objects.ClockedObject import ClockedObject 4713665Sandreas.sandberg@arm.comfrom m5.objects.IndexingPolicies import * 4813665Sandreas.sandberg@arm.comfrom m5.objects.ReplacementPolicies import * 498832SAli.Saidi@ARM.com 5013416Sjavier.bueno@metempsy.comclass HWPProbeEvent(object): 5113416Sjavier.bueno@metempsy.com def __init__(self, prefetcher, obj, *listOfNames): 5213416Sjavier.bueno@metempsy.com self.obj = obj 5313416Sjavier.bueno@metempsy.com self.prefetcher = prefetcher 5413416Sjavier.bueno@metempsy.com self.names = listOfNames 5513416Sjavier.bueno@metempsy.com 5613416Sjavier.bueno@metempsy.com def register(self): 5713416Sjavier.bueno@metempsy.com if self.obj: 5813416Sjavier.bueno@metempsy.com for name in self.names: 5913416Sjavier.bueno@metempsy.com self.prefetcher.getCCObject().addEventProbe( 6013416Sjavier.bueno@metempsy.com self.obj.getCCObject(), name) 6113416Sjavier.bueno@metempsy.com 629288Sandreas.hansson@arm.comclass BasePrefetcher(ClockedObject): 638831Smrinmoy.ghosh@arm.com type = 'BasePrefetcher' 648831Smrinmoy.ghosh@arm.com abstract = True 659338SAndreas.Sandberg@arm.com cxx_header = "mem/cache/prefetch/base.hh" 6613416Sjavier.bueno@metempsy.com cxx_exports = [ 6713416Sjavier.bueno@metempsy.com PyBindMethod("addEventProbe"), 6813416Sjavier.bueno@metempsy.com ] 6910466Sandreas.hansson@arm.com sys = Param.System(Parent.any, "System this prefetcher belongs to") 708831Smrinmoy.ghosh@arm.com 7113422Sodanrc@yahoo.com.br # Get the block size from the parent (system) 7213422Sodanrc@yahoo.com.br block_size = Param.Int(Parent.cache_line_size, "Block size in bytes") 7313422Sodanrc@yahoo.com.br 7410623Smitch.hayenga@arm.com on_miss = Param.Bool(False, "Only notify prefetcher on misses") 7510623Smitch.hayenga@arm.com on_read = Param.Bool(True, "Notify prefetcher on reads") 7610623Smitch.hayenga@arm.com on_write = Param.Bool(True, "Notify prefetcher on writes") 7710623Smitch.hayenga@arm.com on_data = Param.Bool(True, "Notify prefetcher on data accesses") 7810623Smitch.hayenga@arm.com on_inst = Param.Bool(True, "Notify prefetcher on instruction accesses") 7913416Sjavier.bueno@metempsy.com prefetch_on_access = Param.Bool(Parent.prefetch_on_access, 8013416Sjavier.bueno@metempsy.com "Notify the hardware prefetcher on every access (not just misses)") 8113551Sjavier.bueno@metempsy.com use_virtual_addresses = Param.Bool(False, 8213551Sjavier.bueno@metempsy.com "Use virtual addresses for prefetching") 8313416Sjavier.bueno@metempsy.com 8413416Sjavier.bueno@metempsy.com _events = [] 8513416Sjavier.bueno@metempsy.com def addEvent(self, newObject): 8613416Sjavier.bueno@metempsy.com self._events.append(newObject) 8713416Sjavier.bueno@metempsy.com 8813416Sjavier.bueno@metempsy.com # Override the normal SimObject::regProbeListeners method and 8913416Sjavier.bueno@metempsy.com # register deferred event handlers. 9013416Sjavier.bueno@metempsy.com def regProbeListeners(self): 9113416Sjavier.bueno@metempsy.com for event in self._events: 9213416Sjavier.bueno@metempsy.com event.register() 9313416Sjavier.bueno@metempsy.com self.getCCObject().regProbeListeners() 9413416Sjavier.bueno@metempsy.com 9513416Sjavier.bueno@metempsy.com def listenFromProbe(self, simObj, *probeNames): 9613416Sjavier.bueno@metempsy.com if not isinstance(simObj, SimObject): 9713416Sjavier.bueno@metempsy.com raise TypeError("argument must be of SimObject type") 9813416Sjavier.bueno@metempsy.com if len(probeNames) <= 0: 9913416Sjavier.bueno@metempsy.com raise TypeError("probeNames must have at least one element") 10013416Sjavier.bueno@metempsy.com self.addEvent(HWPProbeEvent(self, simObj, *probeNames)) 10110623Smitch.hayenga@arm.com 10213991Sandreas.sandberg@arm.comclass MultiPrefetcher(BasePrefetcher): 10313991Sandreas.sandberg@arm.com type = 'MultiPrefetcher' 10413991Sandreas.sandberg@arm.com cxx_class = 'MultiPrefetcher' 10513991Sandreas.sandberg@arm.com cxx_header = 'mem/cache/prefetch/multi.hh' 10613991Sandreas.sandberg@arm.com 10713991Sandreas.sandberg@arm.com prefetchers = VectorParam.BasePrefetcher([], "Array of prefetchers") 10813991Sandreas.sandberg@arm.com 10910623Smitch.hayenga@arm.comclass QueuedPrefetcher(BasePrefetcher): 11010623Smitch.hayenga@arm.com type = "QueuedPrefetcher" 11110623Smitch.hayenga@arm.com abstract = True 11210623Smitch.hayenga@arm.com cxx_class = "QueuedPrefetcher" 11310623Smitch.hayenga@arm.com cxx_header = "mem/cache/prefetch/queued.hh" 11410623Smitch.hayenga@arm.com latency = Param.Int(1, "Latency for generated prefetches") 11510623Smitch.hayenga@arm.com queue_size = Param.Int(32, "Maximum number of queued prefetches") 11610623Smitch.hayenga@arm.com queue_squash = Param.Bool(True, "Squash queued prefetch on demand access") 11710623Smitch.hayenga@arm.com queue_filter = Param.Bool(True, "Don't queue redundant prefetches") 11810623Smitch.hayenga@arm.com cache_snoop = Param.Bool(False, "Snoop cache to eliminate redundant request") 11910623Smitch.hayenga@arm.com 12010623Smitch.hayenga@arm.com tag_prefetch = Param.Bool(True, "Tag prefetch with PC of generating access") 12110623Smitch.hayenga@arm.com 12210623Smitch.hayenga@arm.comclass StridePrefetcher(QueuedPrefetcher): 1238831Smrinmoy.ghosh@arm.com type = 'StridePrefetcher' 1248831Smrinmoy.ghosh@arm.com cxx_class = 'StridePrefetcher' 1259338SAndreas.Sandberg@arm.com cxx_header = "mem/cache/prefetch/stride.hh" 1268831Smrinmoy.ghosh@arm.com 12713422Sodanrc@yahoo.com.br # Do not consult stride prefetcher on instruction accesses 12813422Sodanrc@yahoo.com.br on_inst = False 12913422Sodanrc@yahoo.com.br 13010623Smitch.hayenga@arm.com max_conf = Param.Int(7, "Maximum confidence level") 13110623Smitch.hayenga@arm.com thresh_conf = Param.Int(4, "Threshold confidence level") 13210623Smitch.hayenga@arm.com min_conf = Param.Int(0, "Minimum confidence level") 13310623Smitch.hayenga@arm.com start_conf = Param.Int(4, "Starting confidence for new entries") 13410623Smitch.hayenga@arm.com 13510623Smitch.hayenga@arm.com table_sets = Param.Int(16, "Number of sets in PC lookup table") 13610623Smitch.hayenga@arm.com table_assoc = Param.Int(4, "Associativity of PC lookup table") 13710623Smitch.hayenga@arm.com use_master_id = Param.Bool(True, "Use master id based history") 13810623Smitch.hayenga@arm.com 13910623Smitch.hayenga@arm.com degree = Param.Int(4, "Number of prefetches to generate") 14010623Smitch.hayenga@arm.com 14113427Sodanrc@yahoo.com.br # Get replacement policy 14213427Sodanrc@yahoo.com.br replacement_policy = Param.BaseReplacementPolicy(RandomRP(), 14313427Sodanrc@yahoo.com.br "Replacement policy") 14413427Sodanrc@yahoo.com.br 14510623Smitch.hayenga@arm.comclass TaggedPrefetcher(QueuedPrefetcher): 1468831Smrinmoy.ghosh@arm.com type = 'TaggedPrefetcher' 1478831Smrinmoy.ghosh@arm.com cxx_class = 'TaggedPrefetcher' 1489338SAndreas.Sandberg@arm.com cxx_header = "mem/cache/prefetch/tagged.hh" 1498831Smrinmoy.ghosh@arm.com 15010623Smitch.hayenga@arm.com degree = Param.Int(2, "Number of prefetches to generate") 15113553Sjavier.bueno@metempsy.com 15213772Sjavier.bueno@metempsy.comclass IndirectMemoryPrefetcher(QueuedPrefetcher): 15313772Sjavier.bueno@metempsy.com type = 'IndirectMemoryPrefetcher' 15413772Sjavier.bueno@metempsy.com cxx_class = 'IndirectMemoryPrefetcher' 15513772Sjavier.bueno@metempsy.com cxx_header = "mem/cache/prefetch/indirect_memory.hh" 15613772Sjavier.bueno@metempsy.com pt_table_entries = Param.MemorySize("16", 15713772Sjavier.bueno@metempsy.com "Number of entries of the Prefetch Table") 15813772Sjavier.bueno@metempsy.com pt_table_assoc = Param.Unsigned(16, "Associativity of the Prefetch Table") 15913772Sjavier.bueno@metempsy.com pt_table_indexing_policy = Param.BaseIndexingPolicy( 16013772Sjavier.bueno@metempsy.com SetAssociative(entry_size = 1, assoc = Parent.pt_table_assoc, 16113772Sjavier.bueno@metempsy.com size = Parent.pt_table_entries), 16213772Sjavier.bueno@metempsy.com "Indexing policy of the pattern table") 16313772Sjavier.bueno@metempsy.com pt_table_replacement_policy = Param.BaseReplacementPolicy(LRURP(), 16413772Sjavier.bueno@metempsy.com "Replacement policy of the pattern table") 16513772Sjavier.bueno@metempsy.com max_prefetch_distance = Param.Unsigned(16, "Maximum prefetch distance") 16613963Sodanrc@yahoo.com.br num_indirect_counter_bits = Param.Unsigned(3, 16713963Sodanrc@yahoo.com.br "Number of bits of the indirect counter") 16813772Sjavier.bueno@metempsy.com ipd_table_entries = Param.MemorySize("4", 16913772Sjavier.bueno@metempsy.com "Number of entries of the Indirect Pattern Detector") 17013772Sjavier.bueno@metempsy.com ipd_table_assoc = Param.Unsigned(4, 17113772Sjavier.bueno@metempsy.com "Associativity of the Indirect Pattern Detector") 17213772Sjavier.bueno@metempsy.com ipd_table_indexing_policy = Param.BaseIndexingPolicy( 17313772Sjavier.bueno@metempsy.com SetAssociative(entry_size = 1, assoc = Parent.ipd_table_assoc, 17413772Sjavier.bueno@metempsy.com size = Parent.ipd_table_entries), 17513772Sjavier.bueno@metempsy.com "Indexing policy of the Indirect Pattern Detector") 17613772Sjavier.bueno@metempsy.com ipd_table_replacement_policy = Param.BaseReplacementPolicy(LRURP(), 17713772Sjavier.bueno@metempsy.com "Replacement policy of the Indirect Pattern Detector") 17813772Sjavier.bueno@metempsy.com shift_values = VectorParam.Int([2, 3, 4, -3], "Shift values to evaluate") 17913772Sjavier.bueno@metempsy.com addr_array_len = Param.Unsigned(4, "Number of misses tracked") 18013772Sjavier.bueno@metempsy.com prefetch_threshold = Param.Unsigned(2, 18113772Sjavier.bueno@metempsy.com "Counter threshold to start the indirect prefetching") 18213772Sjavier.bueno@metempsy.com stream_counter_threshold = Param.Unsigned(4, 18313772Sjavier.bueno@metempsy.com "Counter threshold to enable the stream prefetcher") 18413772Sjavier.bueno@metempsy.com streaming_distance = Param.Unsigned(4, 18513772Sjavier.bueno@metempsy.com "Number of prefetches to generate when using the stream prefetcher") 18613772Sjavier.bueno@metempsy.com 18713553Sjavier.bueno@metempsy.comclass SignaturePathPrefetcher(QueuedPrefetcher): 18813553Sjavier.bueno@metempsy.com type = 'SignaturePathPrefetcher' 18913553Sjavier.bueno@metempsy.com cxx_class = 'SignaturePathPrefetcher' 19013553Sjavier.bueno@metempsy.com cxx_header = "mem/cache/prefetch/signature_path.hh" 19113553Sjavier.bueno@metempsy.com 19213553Sjavier.bueno@metempsy.com signature_shift = Param.UInt8(3, 19313553Sjavier.bueno@metempsy.com "Number of bits to shift when calculating a new signature"); 19413553Sjavier.bueno@metempsy.com signature_bits = Param.UInt16(12, 19513553Sjavier.bueno@metempsy.com "Size of the signature, in bits"); 19613553Sjavier.bueno@metempsy.com signature_table_entries = Param.MemorySize("1024", 19713553Sjavier.bueno@metempsy.com "Number of entries of the signature table") 19813553Sjavier.bueno@metempsy.com signature_table_assoc = Param.Unsigned(2, 19913553Sjavier.bueno@metempsy.com "Associativity of the signature table") 20013553Sjavier.bueno@metempsy.com signature_table_indexing_policy = Param.BaseIndexingPolicy( 20113553Sjavier.bueno@metempsy.com SetAssociative(entry_size = 1, assoc = Parent.signature_table_assoc, 20213553Sjavier.bueno@metempsy.com size = Parent.signature_table_entries), 20313553Sjavier.bueno@metempsy.com "Indexing policy of the signature table") 20413553Sjavier.bueno@metempsy.com signature_table_replacement_policy = Param.BaseReplacementPolicy(LRURP(), 20513553Sjavier.bueno@metempsy.com "Replacement policy of the signature table") 20613553Sjavier.bueno@metempsy.com 20713963Sodanrc@yahoo.com.br num_counter_bits = Param.UInt8(3, 20813963Sodanrc@yahoo.com.br "Number of bits of the saturating counters") 20913553Sjavier.bueno@metempsy.com pattern_table_entries = Param.MemorySize("4096", 21013553Sjavier.bueno@metempsy.com "Number of entries of the pattern table") 21113553Sjavier.bueno@metempsy.com pattern_table_assoc = Param.Unsigned(1, 21213553Sjavier.bueno@metempsy.com "Associativity of the pattern table") 21313553Sjavier.bueno@metempsy.com strides_per_pattern_entry = Param.Unsigned(4, 21413553Sjavier.bueno@metempsy.com "Number of strides stored in each pattern entry") 21513553Sjavier.bueno@metempsy.com pattern_table_indexing_policy = Param.BaseIndexingPolicy( 21613553Sjavier.bueno@metempsy.com SetAssociative(entry_size = 1, assoc = Parent.pattern_table_assoc, 21713553Sjavier.bueno@metempsy.com size = Parent.pattern_table_entries), 21813553Sjavier.bueno@metempsy.com "Indexing policy of the pattern table") 21913553Sjavier.bueno@metempsy.com pattern_table_replacement_policy = Param.BaseReplacementPolicy(LRURP(), 22013553Sjavier.bueno@metempsy.com "Replacement policy of the pattern table") 22113553Sjavier.bueno@metempsy.com 22213553Sjavier.bueno@metempsy.com prefetch_confidence_threshold = Param.Float(0.5, 22313553Sjavier.bueno@metempsy.com "Minimum confidence to issue prefetches") 22413553Sjavier.bueno@metempsy.com lookahead_confidence_threshold = Param.Float(0.75, 22513553Sjavier.bueno@metempsy.com "Minimum confidence to continue exploring lookahead entries") 22613554Sjavier.bueno@metempsy.com 22713624Sjavier.bueno@metempsy.comclass SignaturePathPrefetcherV2(SignaturePathPrefetcher): 22813624Sjavier.bueno@metempsy.com type = 'SignaturePathPrefetcherV2' 22913624Sjavier.bueno@metempsy.com cxx_class = 'SignaturePathPrefetcherV2' 23013624Sjavier.bueno@metempsy.com cxx_header = "mem/cache/prefetch/signature_path_v2.hh" 23113624Sjavier.bueno@metempsy.com 23213624Sjavier.bueno@metempsy.com signature_table_entries = "256" 23313624Sjavier.bueno@metempsy.com signature_table_assoc = 1 23413624Sjavier.bueno@metempsy.com pattern_table_entries = "512" 23513624Sjavier.bueno@metempsy.com pattern_table_assoc = 1 23613963Sodanrc@yahoo.com.br num_counter_bits = 4 23713624Sjavier.bueno@metempsy.com prefetch_confidence_threshold = 0.25 23813624Sjavier.bueno@metempsy.com lookahead_confidence_threshold = 0.25 23913624Sjavier.bueno@metempsy.com 24013624Sjavier.bueno@metempsy.com global_history_register_entries = Param.MemorySize("8", 24113624Sjavier.bueno@metempsy.com "Number of entries of global history register") 24213624Sjavier.bueno@metempsy.com global_history_register_indexing_policy = Param.BaseIndexingPolicy( 24313624Sjavier.bueno@metempsy.com SetAssociative(entry_size = 1, 24413624Sjavier.bueno@metempsy.com assoc = Parent.global_history_register_entries, 24513624Sjavier.bueno@metempsy.com size = Parent.global_history_register_entries), 24613624Sjavier.bueno@metempsy.com "Indexing policy of the global history register") 24713624Sjavier.bueno@metempsy.com global_history_register_replacement_policy = Param.BaseReplacementPolicy( 24813624Sjavier.bueno@metempsy.com LRURP(), "Replacement policy of the global history register") 24913624Sjavier.bueno@metempsy.com 25013700Sjavier.bueno@metempsy.comclass AccessMapPatternMatching(ClockedObject): 25113700Sjavier.bueno@metempsy.com type = 'AccessMapPatternMatching' 25213700Sjavier.bueno@metempsy.com cxx_class = 'AccessMapPatternMatching' 25313554Sjavier.bueno@metempsy.com cxx_header = "mem/cache/prefetch/access_map_pattern_matching.hh" 25413554Sjavier.bueno@metempsy.com 25513700Sjavier.bueno@metempsy.com block_size = Param.Unsigned(Parent.block_size, 25613700Sjavier.bueno@metempsy.com "Cacheline size used by the prefetcher using this object") 25713700Sjavier.bueno@metempsy.com 25813700Sjavier.bueno@metempsy.com limit_stride = Param.Unsigned(0, 25913700Sjavier.bueno@metempsy.com "Limit the strides checked up to -X/X, if 0, disable the limit") 26013554Sjavier.bueno@metempsy.com start_degree = Param.Unsigned(4, 26113554Sjavier.bueno@metempsy.com "Initial degree (Maximum number of prefetches generated") 26213554Sjavier.bueno@metempsy.com hot_zone_size = Param.MemorySize("2kB", "Memory covered by a hot zone") 26313554Sjavier.bueno@metempsy.com access_map_table_entries = Param.MemorySize("256", 26413554Sjavier.bueno@metempsy.com "Number of entries in the access map table") 26513554Sjavier.bueno@metempsy.com access_map_table_assoc = Param.Unsigned(8, 26613554Sjavier.bueno@metempsy.com "Associativity of the access map table") 26713554Sjavier.bueno@metempsy.com access_map_table_indexing_policy = Param.BaseIndexingPolicy( 26813554Sjavier.bueno@metempsy.com SetAssociative(entry_size = 1, assoc = Parent.access_map_table_assoc, 26913554Sjavier.bueno@metempsy.com size = Parent.access_map_table_entries), 27013554Sjavier.bueno@metempsy.com "Indexing policy of the access map table") 27113554Sjavier.bueno@metempsy.com access_map_table_replacement_policy = Param.BaseReplacementPolicy(LRURP(), 27213554Sjavier.bueno@metempsy.com "Replacement policy of the access map table") 27313554Sjavier.bueno@metempsy.com high_coverage_threshold = Param.Float(0.25, 27413554Sjavier.bueno@metempsy.com "A prefetch coverage factor bigger than this is considered high") 27513554Sjavier.bueno@metempsy.com low_coverage_threshold = Param.Float(0.125, 27613554Sjavier.bueno@metempsy.com "A prefetch coverage factor smaller than this is considered low") 27713554Sjavier.bueno@metempsy.com high_accuracy_threshold = Param.Float(0.5, 27813554Sjavier.bueno@metempsy.com "A prefetch accuracy factor bigger than this is considered high") 27913554Sjavier.bueno@metempsy.com low_accuracy_threshold = Param.Float(0.25, 28013554Sjavier.bueno@metempsy.com "A prefetch accuracy factor smaller than this is considered low") 28113554Sjavier.bueno@metempsy.com high_cache_hit_threshold = Param.Float(0.875, 28213554Sjavier.bueno@metempsy.com "A cache hit ratio bigger than this is considered high") 28313554Sjavier.bueno@metempsy.com low_cache_hit_threshold = Param.Float(0.75, 28413554Sjavier.bueno@metempsy.com "A cache hit ratio smaller than this is considered low") 28513554Sjavier.bueno@metempsy.com epoch_cycles = Param.Cycles(256000, "Cycles in an epoch period") 28613554Sjavier.bueno@metempsy.com offchip_memory_latency = Param.Latency("30ns", 28713554Sjavier.bueno@metempsy.com "Memory latency used to compute the required memory bandwidth") 28813667Sjavier.bueno@metempsy.com 28913700Sjavier.bueno@metempsy.comclass AMPMPrefetcher(QueuedPrefetcher): 29013700Sjavier.bueno@metempsy.com type = 'AMPMPrefetcher' 29113700Sjavier.bueno@metempsy.com cxx_class = 'AMPMPrefetcher' 29213700Sjavier.bueno@metempsy.com cxx_header = "mem/cache/prefetch/access_map_pattern_matching.hh" 29313700Sjavier.bueno@metempsy.com ampm = Param.AccessMapPatternMatching( AccessMapPatternMatching(), 29413700Sjavier.bueno@metempsy.com "Access Map Pattern Matching object") 29513700Sjavier.bueno@metempsy.com 29613667Sjavier.bueno@metempsy.comclass DeltaCorrelatingPredictionTables(SimObject): 29713667Sjavier.bueno@metempsy.com type = 'DeltaCorrelatingPredictionTables' 29813667Sjavier.bueno@metempsy.com cxx_class = 'DeltaCorrelatingPredictionTables' 29913667Sjavier.bueno@metempsy.com cxx_header = "mem/cache/prefetch/delta_correlating_prediction_tables.hh" 30013667Sjavier.bueno@metempsy.com deltas_per_entry = Param.Unsigned(20, 30113667Sjavier.bueno@metempsy.com "Number of deltas stored in each table entry") 30213667Sjavier.bueno@metempsy.com delta_bits = Param.Unsigned(12, "Bits per delta") 30313667Sjavier.bueno@metempsy.com delta_mask_bits = Param.Unsigned(8, 30413667Sjavier.bueno@metempsy.com "Lower bits to mask when comparing deltas") 30513667Sjavier.bueno@metempsy.com table_entries = Param.MemorySize("128", 30613667Sjavier.bueno@metempsy.com "Number of entries in the table") 30713667Sjavier.bueno@metempsy.com table_assoc = Param.Unsigned(128, 30813667Sjavier.bueno@metempsy.com "Associativity of the table") 30913667Sjavier.bueno@metempsy.com table_indexing_policy = Param.BaseIndexingPolicy( 31013667Sjavier.bueno@metempsy.com SetAssociative(entry_size = 1, assoc = Parent.table_assoc, 31113667Sjavier.bueno@metempsy.com size = Parent.table_entries), 31213667Sjavier.bueno@metempsy.com "Indexing policy of the table") 31313667Sjavier.bueno@metempsy.com table_replacement_policy = Param.BaseReplacementPolicy(LRURP(), 31413667Sjavier.bueno@metempsy.com "Replacement policy of the table") 31513667Sjavier.bueno@metempsy.com 31613667Sjavier.bueno@metempsy.comclass DCPTPrefetcher(QueuedPrefetcher): 31713667Sjavier.bueno@metempsy.com type = 'DCPTPrefetcher' 31813667Sjavier.bueno@metempsy.com cxx_class = 'DCPTPrefetcher' 31913667Sjavier.bueno@metempsy.com cxx_header = "mem/cache/prefetch/delta_correlating_prediction_tables.hh" 32013667Sjavier.bueno@metempsy.com dcpt = Param.DeltaCorrelatingPredictionTables( 32113667Sjavier.bueno@metempsy.com DeltaCorrelatingPredictionTables(), 32213667Sjavier.bueno@metempsy.com "Delta Correlating Prediction Tables object") 32313667Sjavier.bueno@metempsy.com 32413669Sjavier.bueno@metempsy.comclass IrregularStreamBufferPrefetcher(QueuedPrefetcher): 32513669Sjavier.bueno@metempsy.com type = "IrregularStreamBufferPrefetcher" 32613669Sjavier.bueno@metempsy.com cxx_class = "IrregularStreamBufferPrefetcher" 32713669Sjavier.bueno@metempsy.com cxx_header = "mem/cache/prefetch/irregular_stream_buffer.hh" 32813669Sjavier.bueno@metempsy.com 32913963Sodanrc@yahoo.com.br num_counter_bits = Param.Unsigned(2, 33013963Sodanrc@yahoo.com.br "Number of bits of the confidence counter") 33113669Sjavier.bueno@metempsy.com chunk_size = Param.Unsigned(256, 33213669Sjavier.bueno@metempsy.com "Maximum number of addresses in a temporal stream") 33313669Sjavier.bueno@metempsy.com degree = Param.Unsigned(4, "Number of prefetches to generate") 33413669Sjavier.bueno@metempsy.com training_unit_assoc = Param.Unsigned(128, 33513669Sjavier.bueno@metempsy.com "Associativity of the training unit") 33613669Sjavier.bueno@metempsy.com training_unit_entries = Param.MemorySize("128", 33713669Sjavier.bueno@metempsy.com "Number of entries of the training unit") 33813669Sjavier.bueno@metempsy.com training_unit_indexing_policy = Param.BaseIndexingPolicy( 33913669Sjavier.bueno@metempsy.com SetAssociative(entry_size = 1, assoc = Parent.training_unit_assoc, 34013669Sjavier.bueno@metempsy.com size = Parent.training_unit_entries), 34113669Sjavier.bueno@metempsy.com "Indexing policy of the training unit") 34213669Sjavier.bueno@metempsy.com training_unit_replacement_policy = Param.BaseReplacementPolicy(LRURP(), 34313669Sjavier.bueno@metempsy.com "Replacement policy of the training unit") 34413669Sjavier.bueno@metempsy.com 34513669Sjavier.bueno@metempsy.com prefetch_candidates_per_entry = Param.Unsigned(16, 34613669Sjavier.bueno@metempsy.com "Number of prefetch candidates stored in a SP-AMC entry") 34713669Sjavier.bueno@metempsy.com address_map_cache_assoc = Param.Unsigned(128, 34813669Sjavier.bueno@metempsy.com "Associativity of the PS/SP AMCs") 34913669Sjavier.bueno@metempsy.com address_map_cache_entries = Param.MemorySize("128", 35013669Sjavier.bueno@metempsy.com "Number of entries of the PS/SP AMCs") 35113669Sjavier.bueno@metempsy.com ps_address_map_cache_indexing_policy = Param.BaseIndexingPolicy( 35213669Sjavier.bueno@metempsy.com SetAssociative(entry_size = 1, 35313669Sjavier.bueno@metempsy.com assoc = Parent.address_map_cache_assoc, 35413669Sjavier.bueno@metempsy.com size = Parent.address_map_cache_entries), 35513669Sjavier.bueno@metempsy.com "Indexing policy of the Physical-to-Structural Address Map Cache") 35613669Sjavier.bueno@metempsy.com ps_address_map_cache_replacement_policy = Param.BaseReplacementPolicy( 35713669Sjavier.bueno@metempsy.com LRURP(), 35813669Sjavier.bueno@metempsy.com "Replacement policy of the Physical-to-Structural Address Map Cache") 35913669Sjavier.bueno@metempsy.com sp_address_map_cache_indexing_policy = Param.BaseIndexingPolicy( 36013669Sjavier.bueno@metempsy.com SetAssociative(entry_size = 1, 36113669Sjavier.bueno@metempsy.com assoc = Parent.address_map_cache_assoc, 36213669Sjavier.bueno@metempsy.com size = Parent.address_map_cache_entries), 36313669Sjavier.bueno@metempsy.com "Indexing policy of the Structural-to-Physical Address Mao Cache") 36413669Sjavier.bueno@metempsy.com sp_address_map_cache_replacement_policy = Param.BaseReplacementPolicy( 36513669Sjavier.bueno@metempsy.com LRURP(), 36613669Sjavier.bueno@metempsy.com "Replacement policy of the Structural-to-Physical Address Map Cache") 36713700Sjavier.bueno@metempsy.com 36813700Sjavier.bueno@metempsy.comclass SlimAccessMapPatternMatching(AccessMapPatternMatching): 36913700Sjavier.bueno@metempsy.com start_degree = 2 37013700Sjavier.bueno@metempsy.com limit_stride = 4 37113700Sjavier.bueno@metempsy.com 37213700Sjavier.bueno@metempsy.comclass SlimDeltaCorrelatingPredictionTables(DeltaCorrelatingPredictionTables): 37313700Sjavier.bueno@metempsy.com table_entries = "256" 37413700Sjavier.bueno@metempsy.com table_assoc = 256 37513700Sjavier.bueno@metempsy.com deltas_per_entry = 9 37613700Sjavier.bueno@metempsy.com 37713700Sjavier.bueno@metempsy.comclass SlimAMPMPrefetcher(QueuedPrefetcher): 37813700Sjavier.bueno@metempsy.com type = 'SlimAMPMPrefetcher' 37913700Sjavier.bueno@metempsy.com cxx_class = 'SlimAMPMPrefetcher' 38013700Sjavier.bueno@metempsy.com cxx_header = "mem/cache/prefetch/slim_ampm.hh" 38113700Sjavier.bueno@metempsy.com 38213700Sjavier.bueno@metempsy.com ampm = Param.AccessMapPatternMatching(SlimAccessMapPatternMatching(), 38313700Sjavier.bueno@metempsy.com "Access Map Pattern Matching object") 38413700Sjavier.bueno@metempsy.com dcpt = Param.DeltaCorrelatingPredictionTables( 38513700Sjavier.bueno@metempsy.com SlimDeltaCorrelatingPredictionTables(), 38613700Sjavier.bueno@metempsy.com "Delta Correlating Prediction Tables object") 38713717Sivan.pizarro@metempsy.com 38813717Sivan.pizarro@metempsy.comclass BOPPrefetcher(QueuedPrefetcher): 38913717Sivan.pizarro@metempsy.com type = "BOPPrefetcher" 39013717Sivan.pizarro@metempsy.com cxx_class = "BOPPrefetcher" 39113717Sivan.pizarro@metempsy.com cxx_header = "mem/cache/prefetch/bop.hh" 39213717Sivan.pizarro@metempsy.com score_max = Param.Unsigned(31, "Max. score to update the best offset") 39313717Sivan.pizarro@metempsy.com round_max = Param.Unsigned(100, "Max. round to update the best offset") 39413717Sivan.pizarro@metempsy.com bad_score = Param.Unsigned(10, "Score at which the HWP is disabled") 39513717Sivan.pizarro@metempsy.com rr_size = Param.Unsigned(64, "Number of entries of each RR bank") 39613717Sivan.pizarro@metempsy.com tag_bits = Param.Unsigned(12, "Bits used to store the tag") 39713717Sivan.pizarro@metempsy.com offset_list_size = Param.Unsigned(46, 39813717Sivan.pizarro@metempsy.com "Number of entries in the offsets list") 39913717Sivan.pizarro@metempsy.com negative_offsets_enable = Param.Bool(True, 40013717Sivan.pizarro@metempsy.com "Initialize the offsets list also with negative values \ 40113717Sivan.pizarro@metempsy.com (i.e. the table will have half of the entries with positive \ 40213717Sivan.pizarro@metempsy.com offsets and the other half with negative ones)") 40313717Sivan.pizarro@metempsy.com delay_queue_enable = Param.Bool(True, "Enable the delay queue") 40413717Sivan.pizarro@metempsy.com delay_queue_size = Param.Unsigned(15, 40513717Sivan.pizarro@metempsy.com "Number of entries in the delay queue") 40613717Sivan.pizarro@metempsy.com delay_queue_cycles = Param.Cycles(60, 40713717Sivan.pizarro@metempsy.com "Cycles to delay a write in the left RR table from the delay \ 40813717Sivan.pizarro@metempsy.com queue") 40913735Sivan.pizarro@metempsy.com 41013735Sivan.pizarro@metempsy.comclass SBOOEPrefetcher(QueuedPrefetcher): 41113735Sivan.pizarro@metempsy.com type = 'SBOOEPrefetcher' 41213735Sivan.pizarro@metempsy.com cxx_class = 'SBOOEPrefetcher' 41313735Sivan.pizarro@metempsy.com cxx_header = "mem/cache/prefetch/sbooe.hh" 41413735Sivan.pizarro@metempsy.com latency_buffer_size = Param.Int(32, "Entries in the latency buffer") 41513735Sivan.pizarro@metempsy.com sequential_prefetchers = Param.Int(9, "Number of sequential prefetchers") 41613735Sivan.pizarro@metempsy.com sandbox_entries = Param.Int(1024, "Size of the address buffer") 41713735Sivan.pizarro@metempsy.com score_threshold_pct = Param.Percent(25, "Min. threshold to issue a \ 41813735Sivan.pizarro@metempsy.com prefetch. The value is the percentage of sandbox entries to use") 41913786Sjavier.bueno@metempsy.com 42013786Sjavier.bueno@metempsy.comclass STeMSPrefetcher(QueuedPrefetcher): 42113786Sjavier.bueno@metempsy.com type = "STeMSPrefetcher" 42213786Sjavier.bueno@metempsy.com cxx_class = "STeMSPrefetcher" 42313786Sjavier.bueno@metempsy.com cxx_header = "mem/cache/prefetch/spatio_temporal_memory_streaming.hh" 42413786Sjavier.bueno@metempsy.com 42513786Sjavier.bueno@metempsy.com spatial_region_size = Param.MemorySize("2kB", 42613786Sjavier.bueno@metempsy.com "Memory covered by a hot zone") 42713786Sjavier.bueno@metempsy.com active_generation_table_entries = Param.MemorySize("64", 42813786Sjavier.bueno@metempsy.com "Number of entries in the active generation table") 42913786Sjavier.bueno@metempsy.com active_generation_table_assoc = Param.Unsigned(64, 43013786Sjavier.bueno@metempsy.com "Associativity of the active generation table") 43113786Sjavier.bueno@metempsy.com active_generation_table_indexing_policy = Param.BaseIndexingPolicy( 43213786Sjavier.bueno@metempsy.com SetAssociative(entry_size = 1, 43313786Sjavier.bueno@metempsy.com assoc = Parent.active_generation_table_assoc, 43413786Sjavier.bueno@metempsy.com size = Parent.active_generation_table_entries), 43513786Sjavier.bueno@metempsy.com "Indexing policy of the active generation table") 43613786Sjavier.bueno@metempsy.com active_generation_table_replacement_policy = Param.BaseReplacementPolicy( 43713786Sjavier.bueno@metempsy.com LRURP(), "Replacement policy of the active generation table") 43813786Sjavier.bueno@metempsy.com 43913786Sjavier.bueno@metempsy.com pattern_sequence_table_entries = Param.MemorySize("16384", 44013786Sjavier.bueno@metempsy.com "Number of entries in the pattern sequence table") 44113786Sjavier.bueno@metempsy.com pattern_sequence_table_assoc = Param.Unsigned(16384, 44213786Sjavier.bueno@metempsy.com "Associativity of the pattern sequence table") 44313786Sjavier.bueno@metempsy.com pattern_sequence_table_indexing_policy = Param.BaseIndexingPolicy( 44413786Sjavier.bueno@metempsy.com SetAssociative(entry_size = 1, 44513786Sjavier.bueno@metempsy.com assoc = Parent.pattern_sequence_table_assoc, 44613786Sjavier.bueno@metempsy.com size = Parent.pattern_sequence_table_entries), 44713786Sjavier.bueno@metempsy.com "Indexing policy of the pattern sequence table") 44813786Sjavier.bueno@metempsy.com pattern_sequence_table_replacement_policy = Param.BaseReplacementPolicy( 44913786Sjavier.bueno@metempsy.com LRURP(), "Replacement policy of the pattern sequence table") 45013786Sjavier.bueno@metempsy.com 45113786Sjavier.bueno@metempsy.com region_miss_order_buffer_entries = Param.Unsigned(131072, 45213786Sjavier.bueno@metempsy.com "Number of entries of the Region Miss Order Buffer") 45313786Sjavier.bueno@metempsy.com reconstruction_entries = Param.Unsigned(256, 45413786Sjavier.bueno@metempsy.com "Number of reconstruction entries") 45513825Sivan.pizarro@metempsy.com 45613825Sivan.pizarro@metempsy.comclass HWPProbeEventRetiredInsts(HWPProbeEvent): 45713825Sivan.pizarro@metempsy.com def register(self): 45813825Sivan.pizarro@metempsy.com if self.obj: 45913825Sivan.pizarro@metempsy.com for name in self.names: 46013825Sivan.pizarro@metempsy.com self.prefetcher.getCCObject().addEventProbeRetiredInsts( 46113825Sivan.pizarro@metempsy.com self.obj.getCCObject(), name) 46213825Sivan.pizarro@metempsy.com 46313825Sivan.pizarro@metempsy.comclass PIFPrefetcher(QueuedPrefetcher): 46413825Sivan.pizarro@metempsy.com type = 'PIFPrefetcher' 46513825Sivan.pizarro@metempsy.com cxx_class = 'PIFPrefetcher' 46613825Sivan.pizarro@metempsy.com cxx_header = "mem/cache/prefetch/pif.hh" 46713825Sivan.pizarro@metempsy.com cxx_exports = [ 46813825Sivan.pizarro@metempsy.com PyBindMethod("addEventProbeRetiredInsts"), 46913825Sivan.pizarro@metempsy.com ] 47013825Sivan.pizarro@metempsy.com 47113825Sivan.pizarro@metempsy.com prec_spatial_region_bits = Param.Unsigned(2, 47213825Sivan.pizarro@metempsy.com "Number of preceding addresses in the spatial region") 47313825Sivan.pizarro@metempsy.com succ_spatial_region_bits = Param.Unsigned(8, 47413825Sivan.pizarro@metempsy.com "Number of subsequent addresses in the spatial region") 47513825Sivan.pizarro@metempsy.com compactor_entries = Param.Unsigned(2, "Entries in the temp. compactor") 47613825Sivan.pizarro@metempsy.com stream_address_buffer_entries = Param.Unsigned(7, "Entries in the SAB") 47713825Sivan.pizarro@metempsy.com history_buffer_size = Param.Unsigned(16, "Entries in the history buffer") 47813825Sivan.pizarro@metempsy.com 47913825Sivan.pizarro@metempsy.com index_entries = Param.MemorySize("64", 48013825Sivan.pizarro@metempsy.com "Number of entries in the index") 48113825Sivan.pizarro@metempsy.com index_assoc = Param.Unsigned(64, 48213825Sivan.pizarro@metempsy.com "Associativity of the index") 48313825Sivan.pizarro@metempsy.com index_indexing_policy = Param.BaseIndexingPolicy( 48413825Sivan.pizarro@metempsy.com SetAssociative(entry_size = 1, assoc = Parent.index_assoc, 48513825Sivan.pizarro@metempsy.com size = Parent.index_entries), 48613825Sivan.pizarro@metempsy.com "Indexing policy of the index") 48713825Sivan.pizarro@metempsy.com index_replacement_policy = Param.BaseReplacementPolicy(LRURP(), 48813825Sivan.pizarro@metempsy.com "Replacement policy of the index") 48913825Sivan.pizarro@metempsy.com 49013825Sivan.pizarro@metempsy.com def listenFromProbeRetiredInstructions(self, simObj): 49113829Sjavier.bueno@metempsy.com if not isinstance(simObj, SimObject): 49213829Sjavier.bueno@metempsy.com raise TypeError("argument must be of SimObject type") 49313825Sivan.pizarro@metempsy.com self.addEvent(HWPProbeEventRetiredInsts(self, simObj,"RetiredInstsPC")) 494