Prefetcher.py revision 13786
110623Smitch.hayenga@arm.com# Copyright (c) 2012, 2014 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 10210623Smitch.hayenga@arm.comclass QueuedPrefetcher(BasePrefetcher): 10310623Smitch.hayenga@arm.com type = "QueuedPrefetcher" 10410623Smitch.hayenga@arm.com abstract = True 10510623Smitch.hayenga@arm.com cxx_class = "QueuedPrefetcher" 10610623Smitch.hayenga@arm.com cxx_header = "mem/cache/prefetch/queued.hh" 10710623Smitch.hayenga@arm.com latency = Param.Int(1, "Latency for generated prefetches") 10810623Smitch.hayenga@arm.com queue_size = Param.Int(32, "Maximum number of queued prefetches") 10910623Smitch.hayenga@arm.com queue_squash = Param.Bool(True, "Squash queued prefetch on demand access") 11010623Smitch.hayenga@arm.com queue_filter = Param.Bool(True, "Don't queue redundant prefetches") 11110623Smitch.hayenga@arm.com cache_snoop = Param.Bool(False, "Snoop cache to eliminate redundant request") 11210623Smitch.hayenga@arm.com 11310623Smitch.hayenga@arm.com tag_prefetch = Param.Bool(True, "Tag prefetch with PC of generating access") 11410623Smitch.hayenga@arm.com 11510623Smitch.hayenga@arm.comclass StridePrefetcher(QueuedPrefetcher): 1168831Smrinmoy.ghosh@arm.com type = 'StridePrefetcher' 1178831Smrinmoy.ghosh@arm.com cxx_class = 'StridePrefetcher' 1189338SAndreas.Sandberg@arm.com cxx_header = "mem/cache/prefetch/stride.hh" 1198831Smrinmoy.ghosh@arm.com 12013422Sodanrc@yahoo.com.br # Do not consult stride prefetcher on instruction accesses 12113422Sodanrc@yahoo.com.br on_inst = False 12213422Sodanrc@yahoo.com.br 12310623Smitch.hayenga@arm.com max_conf = Param.Int(7, "Maximum confidence level") 12410623Smitch.hayenga@arm.com thresh_conf = Param.Int(4, "Threshold confidence level") 12510623Smitch.hayenga@arm.com min_conf = Param.Int(0, "Minimum confidence level") 12610623Smitch.hayenga@arm.com start_conf = Param.Int(4, "Starting confidence for new entries") 12710623Smitch.hayenga@arm.com 12810623Smitch.hayenga@arm.com table_sets = Param.Int(16, "Number of sets in PC lookup table") 12910623Smitch.hayenga@arm.com table_assoc = Param.Int(4, "Associativity of PC lookup table") 13010623Smitch.hayenga@arm.com use_master_id = Param.Bool(True, "Use master id based history") 13110623Smitch.hayenga@arm.com 13210623Smitch.hayenga@arm.com degree = Param.Int(4, "Number of prefetches to generate") 13310623Smitch.hayenga@arm.com 13413427Sodanrc@yahoo.com.br # Get replacement policy 13513427Sodanrc@yahoo.com.br replacement_policy = Param.BaseReplacementPolicy(RandomRP(), 13613427Sodanrc@yahoo.com.br "Replacement policy") 13713427Sodanrc@yahoo.com.br 13810623Smitch.hayenga@arm.comclass TaggedPrefetcher(QueuedPrefetcher): 1398831Smrinmoy.ghosh@arm.com type = 'TaggedPrefetcher' 1408831Smrinmoy.ghosh@arm.com cxx_class = 'TaggedPrefetcher' 1419338SAndreas.Sandberg@arm.com cxx_header = "mem/cache/prefetch/tagged.hh" 1428831Smrinmoy.ghosh@arm.com 14310623Smitch.hayenga@arm.com degree = Param.Int(2, "Number of prefetches to generate") 14413553Sjavier.bueno@metempsy.com 14513772Sjavier.bueno@metempsy.comclass IndirectMemoryPrefetcher(QueuedPrefetcher): 14613772Sjavier.bueno@metempsy.com type = 'IndirectMemoryPrefetcher' 14713772Sjavier.bueno@metempsy.com cxx_class = 'IndirectMemoryPrefetcher' 14813772Sjavier.bueno@metempsy.com cxx_header = "mem/cache/prefetch/indirect_memory.hh" 14913772Sjavier.bueno@metempsy.com pt_table_entries = Param.MemorySize("16", 15013772Sjavier.bueno@metempsy.com "Number of entries of the Prefetch Table") 15113772Sjavier.bueno@metempsy.com pt_table_assoc = Param.Unsigned(16, "Associativity of the Prefetch Table") 15213772Sjavier.bueno@metempsy.com pt_table_indexing_policy = Param.BaseIndexingPolicy( 15313772Sjavier.bueno@metempsy.com SetAssociative(entry_size = 1, assoc = Parent.pt_table_assoc, 15413772Sjavier.bueno@metempsy.com size = Parent.pt_table_entries), 15513772Sjavier.bueno@metempsy.com "Indexing policy of the pattern table") 15613772Sjavier.bueno@metempsy.com pt_table_replacement_policy = Param.BaseReplacementPolicy(LRURP(), 15713772Sjavier.bueno@metempsy.com "Replacement policy of the pattern table") 15813772Sjavier.bueno@metempsy.com max_prefetch_distance = Param.Unsigned(16, "Maximum prefetch distance") 15913772Sjavier.bueno@metempsy.com max_indirect_counter_value = Param.Unsigned(8, 16013772Sjavier.bueno@metempsy.com "Maximum value of the indirect counter") 16113772Sjavier.bueno@metempsy.com ipd_table_entries = Param.MemorySize("4", 16213772Sjavier.bueno@metempsy.com "Number of entries of the Indirect Pattern Detector") 16313772Sjavier.bueno@metempsy.com ipd_table_assoc = Param.Unsigned(4, 16413772Sjavier.bueno@metempsy.com "Associativity of the Indirect Pattern Detector") 16513772Sjavier.bueno@metempsy.com ipd_table_indexing_policy = Param.BaseIndexingPolicy( 16613772Sjavier.bueno@metempsy.com SetAssociative(entry_size = 1, assoc = Parent.ipd_table_assoc, 16713772Sjavier.bueno@metempsy.com size = Parent.ipd_table_entries), 16813772Sjavier.bueno@metempsy.com "Indexing policy of the Indirect Pattern Detector") 16913772Sjavier.bueno@metempsy.com ipd_table_replacement_policy = Param.BaseReplacementPolicy(LRURP(), 17013772Sjavier.bueno@metempsy.com "Replacement policy of the Indirect Pattern Detector") 17113772Sjavier.bueno@metempsy.com shift_values = VectorParam.Int([2, 3, 4, -3], "Shift values to evaluate") 17213772Sjavier.bueno@metempsy.com addr_array_len = Param.Unsigned(4, "Number of misses tracked") 17313772Sjavier.bueno@metempsy.com prefetch_threshold = Param.Unsigned(2, 17413772Sjavier.bueno@metempsy.com "Counter threshold to start the indirect prefetching") 17513772Sjavier.bueno@metempsy.com stream_counter_threshold = Param.Unsigned(4, 17613772Sjavier.bueno@metempsy.com "Counter threshold to enable the stream prefetcher") 17713772Sjavier.bueno@metempsy.com streaming_distance = Param.Unsigned(4, 17813772Sjavier.bueno@metempsy.com "Number of prefetches to generate when using the stream prefetcher") 17913772Sjavier.bueno@metempsy.com 18013553Sjavier.bueno@metempsy.comclass SignaturePathPrefetcher(QueuedPrefetcher): 18113553Sjavier.bueno@metempsy.com type = 'SignaturePathPrefetcher' 18213553Sjavier.bueno@metempsy.com cxx_class = 'SignaturePathPrefetcher' 18313553Sjavier.bueno@metempsy.com cxx_header = "mem/cache/prefetch/signature_path.hh" 18413553Sjavier.bueno@metempsy.com 18513553Sjavier.bueno@metempsy.com signature_shift = Param.UInt8(3, 18613553Sjavier.bueno@metempsy.com "Number of bits to shift when calculating a new signature"); 18713553Sjavier.bueno@metempsy.com signature_bits = Param.UInt16(12, 18813553Sjavier.bueno@metempsy.com "Size of the signature, in bits"); 18913553Sjavier.bueno@metempsy.com signature_table_entries = Param.MemorySize("1024", 19013553Sjavier.bueno@metempsy.com "Number of entries of the signature table") 19113553Sjavier.bueno@metempsy.com signature_table_assoc = Param.Unsigned(2, 19213553Sjavier.bueno@metempsy.com "Associativity of the signature table") 19313553Sjavier.bueno@metempsy.com signature_table_indexing_policy = Param.BaseIndexingPolicy( 19413553Sjavier.bueno@metempsy.com SetAssociative(entry_size = 1, assoc = Parent.signature_table_assoc, 19513553Sjavier.bueno@metempsy.com size = Parent.signature_table_entries), 19613553Sjavier.bueno@metempsy.com "Indexing policy of the signature table") 19713553Sjavier.bueno@metempsy.com signature_table_replacement_policy = Param.BaseReplacementPolicy(LRURP(), 19813553Sjavier.bueno@metempsy.com "Replacement policy of the signature table") 19913553Sjavier.bueno@metempsy.com 20013553Sjavier.bueno@metempsy.com max_counter_value = Param.UInt8(7, "Maximum pattern counter value") 20113553Sjavier.bueno@metempsy.com pattern_table_entries = Param.MemorySize("4096", 20213553Sjavier.bueno@metempsy.com "Number of entries of the pattern table") 20313553Sjavier.bueno@metempsy.com pattern_table_assoc = Param.Unsigned(1, 20413553Sjavier.bueno@metempsy.com "Associativity of the pattern table") 20513553Sjavier.bueno@metempsy.com strides_per_pattern_entry = Param.Unsigned(4, 20613553Sjavier.bueno@metempsy.com "Number of strides stored in each pattern entry") 20713553Sjavier.bueno@metempsy.com pattern_table_indexing_policy = Param.BaseIndexingPolicy( 20813553Sjavier.bueno@metempsy.com SetAssociative(entry_size = 1, assoc = Parent.pattern_table_assoc, 20913553Sjavier.bueno@metempsy.com size = Parent.pattern_table_entries), 21013553Sjavier.bueno@metempsy.com "Indexing policy of the pattern table") 21113553Sjavier.bueno@metempsy.com pattern_table_replacement_policy = Param.BaseReplacementPolicy(LRURP(), 21213553Sjavier.bueno@metempsy.com "Replacement policy of the pattern table") 21313553Sjavier.bueno@metempsy.com 21413553Sjavier.bueno@metempsy.com prefetch_confidence_threshold = Param.Float(0.5, 21513553Sjavier.bueno@metempsy.com "Minimum confidence to issue prefetches") 21613553Sjavier.bueno@metempsy.com lookahead_confidence_threshold = Param.Float(0.75, 21713553Sjavier.bueno@metempsy.com "Minimum confidence to continue exploring lookahead entries") 21813554Sjavier.bueno@metempsy.com 21913624Sjavier.bueno@metempsy.comclass SignaturePathPrefetcherV2(SignaturePathPrefetcher): 22013624Sjavier.bueno@metempsy.com type = 'SignaturePathPrefetcherV2' 22113624Sjavier.bueno@metempsy.com cxx_class = 'SignaturePathPrefetcherV2' 22213624Sjavier.bueno@metempsy.com cxx_header = "mem/cache/prefetch/signature_path_v2.hh" 22313624Sjavier.bueno@metempsy.com 22413624Sjavier.bueno@metempsy.com signature_table_entries = "256" 22513624Sjavier.bueno@metempsy.com signature_table_assoc = 1 22613624Sjavier.bueno@metempsy.com pattern_table_entries = "512" 22713624Sjavier.bueno@metempsy.com pattern_table_assoc = 1 22813624Sjavier.bueno@metempsy.com max_counter_value = 15 22913624Sjavier.bueno@metempsy.com prefetch_confidence_threshold = 0.25 23013624Sjavier.bueno@metempsy.com lookahead_confidence_threshold = 0.25 23113624Sjavier.bueno@metempsy.com 23213624Sjavier.bueno@metempsy.com global_history_register_entries = Param.MemorySize("8", 23313624Sjavier.bueno@metempsy.com "Number of entries of global history register") 23413624Sjavier.bueno@metempsy.com global_history_register_indexing_policy = Param.BaseIndexingPolicy( 23513624Sjavier.bueno@metempsy.com SetAssociative(entry_size = 1, 23613624Sjavier.bueno@metempsy.com assoc = Parent.global_history_register_entries, 23713624Sjavier.bueno@metempsy.com size = Parent.global_history_register_entries), 23813624Sjavier.bueno@metempsy.com "Indexing policy of the global history register") 23913624Sjavier.bueno@metempsy.com global_history_register_replacement_policy = Param.BaseReplacementPolicy( 24013624Sjavier.bueno@metempsy.com LRURP(), "Replacement policy of the global history register") 24113624Sjavier.bueno@metempsy.com 24213700Sjavier.bueno@metempsy.comclass AccessMapPatternMatching(ClockedObject): 24313700Sjavier.bueno@metempsy.com type = 'AccessMapPatternMatching' 24413700Sjavier.bueno@metempsy.com cxx_class = 'AccessMapPatternMatching' 24513554Sjavier.bueno@metempsy.com cxx_header = "mem/cache/prefetch/access_map_pattern_matching.hh" 24613554Sjavier.bueno@metempsy.com 24713700Sjavier.bueno@metempsy.com block_size = Param.Unsigned(Parent.block_size, 24813700Sjavier.bueno@metempsy.com "Cacheline size used by the prefetcher using this object") 24913700Sjavier.bueno@metempsy.com 25013700Sjavier.bueno@metempsy.com limit_stride = Param.Unsigned(0, 25113700Sjavier.bueno@metempsy.com "Limit the strides checked up to -X/X, if 0, disable the limit") 25213554Sjavier.bueno@metempsy.com start_degree = Param.Unsigned(4, 25313554Sjavier.bueno@metempsy.com "Initial degree (Maximum number of prefetches generated") 25413554Sjavier.bueno@metempsy.com hot_zone_size = Param.MemorySize("2kB", "Memory covered by a hot zone") 25513554Sjavier.bueno@metempsy.com access_map_table_entries = Param.MemorySize("256", 25613554Sjavier.bueno@metempsy.com "Number of entries in the access map table") 25713554Sjavier.bueno@metempsy.com access_map_table_assoc = Param.Unsigned(8, 25813554Sjavier.bueno@metempsy.com "Associativity of the access map table") 25913554Sjavier.bueno@metempsy.com access_map_table_indexing_policy = Param.BaseIndexingPolicy( 26013554Sjavier.bueno@metempsy.com SetAssociative(entry_size = 1, assoc = Parent.access_map_table_assoc, 26113554Sjavier.bueno@metempsy.com size = Parent.access_map_table_entries), 26213554Sjavier.bueno@metempsy.com "Indexing policy of the access map table") 26313554Sjavier.bueno@metempsy.com access_map_table_replacement_policy = Param.BaseReplacementPolicy(LRURP(), 26413554Sjavier.bueno@metempsy.com "Replacement policy of the access map table") 26513554Sjavier.bueno@metempsy.com high_coverage_threshold = Param.Float(0.25, 26613554Sjavier.bueno@metempsy.com "A prefetch coverage factor bigger than this is considered high") 26713554Sjavier.bueno@metempsy.com low_coverage_threshold = Param.Float(0.125, 26813554Sjavier.bueno@metempsy.com "A prefetch coverage factor smaller than this is considered low") 26913554Sjavier.bueno@metempsy.com high_accuracy_threshold = Param.Float(0.5, 27013554Sjavier.bueno@metempsy.com "A prefetch accuracy factor bigger than this is considered high") 27113554Sjavier.bueno@metempsy.com low_accuracy_threshold = Param.Float(0.25, 27213554Sjavier.bueno@metempsy.com "A prefetch accuracy factor smaller than this is considered low") 27313554Sjavier.bueno@metempsy.com high_cache_hit_threshold = Param.Float(0.875, 27413554Sjavier.bueno@metempsy.com "A cache hit ratio bigger than this is considered high") 27513554Sjavier.bueno@metempsy.com low_cache_hit_threshold = Param.Float(0.75, 27613554Sjavier.bueno@metempsy.com "A cache hit ratio smaller than this is considered low") 27713554Sjavier.bueno@metempsy.com epoch_cycles = Param.Cycles(256000, "Cycles in an epoch period") 27813554Sjavier.bueno@metempsy.com offchip_memory_latency = Param.Latency("30ns", 27913554Sjavier.bueno@metempsy.com "Memory latency used to compute the required memory bandwidth") 28013667Sjavier.bueno@metempsy.com 28113700Sjavier.bueno@metempsy.comclass AMPMPrefetcher(QueuedPrefetcher): 28213700Sjavier.bueno@metempsy.com type = 'AMPMPrefetcher' 28313700Sjavier.bueno@metempsy.com cxx_class = 'AMPMPrefetcher' 28413700Sjavier.bueno@metempsy.com cxx_header = "mem/cache/prefetch/access_map_pattern_matching.hh" 28513700Sjavier.bueno@metempsy.com ampm = Param.AccessMapPatternMatching( AccessMapPatternMatching(), 28613700Sjavier.bueno@metempsy.com "Access Map Pattern Matching object") 28713700Sjavier.bueno@metempsy.com 28813667Sjavier.bueno@metempsy.comclass DeltaCorrelatingPredictionTables(SimObject): 28913667Sjavier.bueno@metempsy.com type = 'DeltaCorrelatingPredictionTables' 29013667Sjavier.bueno@metempsy.com cxx_class = 'DeltaCorrelatingPredictionTables' 29113667Sjavier.bueno@metempsy.com cxx_header = "mem/cache/prefetch/delta_correlating_prediction_tables.hh" 29213667Sjavier.bueno@metempsy.com deltas_per_entry = Param.Unsigned(20, 29313667Sjavier.bueno@metempsy.com "Number of deltas stored in each table entry") 29413667Sjavier.bueno@metempsy.com delta_bits = Param.Unsigned(12, "Bits per delta") 29513667Sjavier.bueno@metempsy.com delta_mask_bits = Param.Unsigned(8, 29613667Sjavier.bueno@metempsy.com "Lower bits to mask when comparing deltas") 29713667Sjavier.bueno@metempsy.com table_entries = Param.MemorySize("128", 29813667Sjavier.bueno@metempsy.com "Number of entries in the table") 29913667Sjavier.bueno@metempsy.com table_assoc = Param.Unsigned(128, 30013667Sjavier.bueno@metempsy.com "Associativity of the table") 30113667Sjavier.bueno@metempsy.com table_indexing_policy = Param.BaseIndexingPolicy( 30213667Sjavier.bueno@metempsy.com SetAssociative(entry_size = 1, assoc = Parent.table_assoc, 30313667Sjavier.bueno@metempsy.com size = Parent.table_entries), 30413667Sjavier.bueno@metempsy.com "Indexing policy of the table") 30513667Sjavier.bueno@metempsy.com table_replacement_policy = Param.BaseReplacementPolicy(LRURP(), 30613667Sjavier.bueno@metempsy.com "Replacement policy of the table") 30713667Sjavier.bueno@metempsy.com 30813667Sjavier.bueno@metempsy.comclass DCPTPrefetcher(QueuedPrefetcher): 30913667Sjavier.bueno@metempsy.com type = 'DCPTPrefetcher' 31013667Sjavier.bueno@metempsy.com cxx_class = 'DCPTPrefetcher' 31113667Sjavier.bueno@metempsy.com cxx_header = "mem/cache/prefetch/delta_correlating_prediction_tables.hh" 31213667Sjavier.bueno@metempsy.com dcpt = Param.DeltaCorrelatingPredictionTables( 31313667Sjavier.bueno@metempsy.com DeltaCorrelatingPredictionTables(), 31413667Sjavier.bueno@metempsy.com "Delta Correlating Prediction Tables object") 31513667Sjavier.bueno@metempsy.com 31613669Sjavier.bueno@metempsy.comclass IrregularStreamBufferPrefetcher(QueuedPrefetcher): 31713669Sjavier.bueno@metempsy.com type = "IrregularStreamBufferPrefetcher" 31813669Sjavier.bueno@metempsy.com cxx_class = "IrregularStreamBufferPrefetcher" 31913669Sjavier.bueno@metempsy.com cxx_header = "mem/cache/prefetch/irregular_stream_buffer.hh" 32013669Sjavier.bueno@metempsy.com 32113669Sjavier.bueno@metempsy.com max_counter_value = Param.Unsigned(3, 32213669Sjavier.bueno@metempsy.com "Maximum value of the confidence counter") 32313669Sjavier.bueno@metempsy.com chunk_size = Param.Unsigned(256, 32413669Sjavier.bueno@metempsy.com "Maximum number of addresses in a temporal stream") 32513669Sjavier.bueno@metempsy.com degree = Param.Unsigned(4, "Number of prefetches to generate") 32613669Sjavier.bueno@metempsy.com training_unit_assoc = Param.Unsigned(128, 32713669Sjavier.bueno@metempsy.com "Associativity of the training unit") 32813669Sjavier.bueno@metempsy.com training_unit_entries = Param.MemorySize("128", 32913669Sjavier.bueno@metempsy.com "Number of entries of the training unit") 33013669Sjavier.bueno@metempsy.com training_unit_indexing_policy = Param.BaseIndexingPolicy( 33113669Sjavier.bueno@metempsy.com SetAssociative(entry_size = 1, assoc = Parent.training_unit_assoc, 33213669Sjavier.bueno@metempsy.com size = Parent.training_unit_entries), 33313669Sjavier.bueno@metempsy.com "Indexing policy of the training unit") 33413669Sjavier.bueno@metempsy.com training_unit_replacement_policy = Param.BaseReplacementPolicy(LRURP(), 33513669Sjavier.bueno@metempsy.com "Replacement policy of the training unit") 33613669Sjavier.bueno@metempsy.com 33713669Sjavier.bueno@metempsy.com prefetch_candidates_per_entry = Param.Unsigned(16, 33813669Sjavier.bueno@metempsy.com "Number of prefetch candidates stored in a SP-AMC entry") 33913669Sjavier.bueno@metempsy.com address_map_cache_assoc = Param.Unsigned(128, 34013669Sjavier.bueno@metempsy.com "Associativity of the PS/SP AMCs") 34113669Sjavier.bueno@metempsy.com address_map_cache_entries = Param.MemorySize("128", 34213669Sjavier.bueno@metempsy.com "Number of entries of the PS/SP AMCs") 34313669Sjavier.bueno@metempsy.com ps_address_map_cache_indexing_policy = Param.BaseIndexingPolicy( 34413669Sjavier.bueno@metempsy.com SetAssociative(entry_size = 1, 34513669Sjavier.bueno@metempsy.com assoc = Parent.address_map_cache_assoc, 34613669Sjavier.bueno@metempsy.com size = Parent.address_map_cache_entries), 34713669Sjavier.bueno@metempsy.com "Indexing policy of the Physical-to-Structural Address Map Cache") 34813669Sjavier.bueno@metempsy.com ps_address_map_cache_replacement_policy = Param.BaseReplacementPolicy( 34913669Sjavier.bueno@metempsy.com LRURP(), 35013669Sjavier.bueno@metempsy.com "Replacement policy of the Physical-to-Structural Address Map Cache") 35113669Sjavier.bueno@metempsy.com sp_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 Structural-to-Physical Address Mao Cache") 35613669Sjavier.bueno@metempsy.com sp_address_map_cache_replacement_policy = Param.BaseReplacementPolicy( 35713669Sjavier.bueno@metempsy.com LRURP(), 35813669Sjavier.bueno@metempsy.com "Replacement policy of the Structural-to-Physical Address Map Cache") 35913700Sjavier.bueno@metempsy.com 36013700Sjavier.bueno@metempsy.comclass SlimAccessMapPatternMatching(AccessMapPatternMatching): 36113700Sjavier.bueno@metempsy.com start_degree = 2 36213700Sjavier.bueno@metempsy.com limit_stride = 4 36313700Sjavier.bueno@metempsy.com 36413700Sjavier.bueno@metempsy.comclass SlimDeltaCorrelatingPredictionTables(DeltaCorrelatingPredictionTables): 36513700Sjavier.bueno@metempsy.com table_entries = "256" 36613700Sjavier.bueno@metempsy.com table_assoc = 256 36713700Sjavier.bueno@metempsy.com deltas_per_entry = 9 36813700Sjavier.bueno@metempsy.com 36913700Sjavier.bueno@metempsy.comclass SlimAMPMPrefetcher(QueuedPrefetcher): 37013700Sjavier.bueno@metempsy.com type = 'SlimAMPMPrefetcher' 37113700Sjavier.bueno@metempsy.com cxx_class = 'SlimAMPMPrefetcher' 37213700Sjavier.bueno@metempsy.com cxx_header = "mem/cache/prefetch/slim_ampm.hh" 37313700Sjavier.bueno@metempsy.com 37413700Sjavier.bueno@metempsy.com ampm = Param.AccessMapPatternMatching(SlimAccessMapPatternMatching(), 37513700Sjavier.bueno@metempsy.com "Access Map Pattern Matching object") 37613700Sjavier.bueno@metempsy.com dcpt = Param.DeltaCorrelatingPredictionTables( 37713700Sjavier.bueno@metempsy.com SlimDeltaCorrelatingPredictionTables(), 37813700Sjavier.bueno@metempsy.com "Delta Correlating Prediction Tables object") 37913717Sivan.pizarro@metempsy.com 38013717Sivan.pizarro@metempsy.comclass BOPPrefetcher(QueuedPrefetcher): 38113717Sivan.pizarro@metempsy.com type = "BOPPrefetcher" 38213717Sivan.pizarro@metempsy.com cxx_class = "BOPPrefetcher" 38313717Sivan.pizarro@metempsy.com cxx_header = "mem/cache/prefetch/bop.hh" 38413717Sivan.pizarro@metempsy.com score_max = Param.Unsigned(31, "Max. score to update the best offset") 38513717Sivan.pizarro@metempsy.com round_max = Param.Unsigned(100, "Max. round to update the best offset") 38613717Sivan.pizarro@metempsy.com bad_score = Param.Unsigned(10, "Score at which the HWP is disabled") 38713717Sivan.pizarro@metempsy.com rr_size = Param.Unsigned(64, "Number of entries of each RR bank") 38813717Sivan.pizarro@metempsy.com tag_bits = Param.Unsigned(12, "Bits used to store the tag") 38913717Sivan.pizarro@metempsy.com offset_list_size = Param.Unsigned(46, 39013717Sivan.pizarro@metempsy.com "Number of entries in the offsets list") 39113717Sivan.pizarro@metempsy.com negative_offsets_enable = Param.Bool(True, 39213717Sivan.pizarro@metempsy.com "Initialize the offsets list also with negative values \ 39313717Sivan.pizarro@metempsy.com (i.e. the table will have half of the entries with positive \ 39413717Sivan.pizarro@metempsy.com offsets and the other half with negative ones)") 39513717Sivan.pizarro@metempsy.com delay_queue_enable = Param.Bool(True, "Enable the delay queue") 39613717Sivan.pizarro@metempsy.com delay_queue_size = Param.Unsigned(15, 39713717Sivan.pizarro@metempsy.com "Number of entries in the delay queue") 39813717Sivan.pizarro@metempsy.com delay_queue_cycles = Param.Cycles(60, 39913717Sivan.pizarro@metempsy.com "Cycles to delay a write in the left RR table from the delay \ 40013717Sivan.pizarro@metempsy.com queue") 40113735Sivan.pizarro@metempsy.com 40213735Sivan.pizarro@metempsy.comclass SBOOEPrefetcher(QueuedPrefetcher): 40313735Sivan.pizarro@metempsy.com type = 'SBOOEPrefetcher' 40413735Sivan.pizarro@metempsy.com cxx_class = 'SBOOEPrefetcher' 40513735Sivan.pizarro@metempsy.com cxx_header = "mem/cache/prefetch/sbooe.hh" 40613735Sivan.pizarro@metempsy.com latency_buffer_size = Param.Int(32, "Entries in the latency buffer") 40713735Sivan.pizarro@metempsy.com sequential_prefetchers = Param.Int(9, "Number of sequential prefetchers") 40813735Sivan.pizarro@metempsy.com sandbox_entries = Param.Int(1024, "Size of the address buffer") 40913735Sivan.pizarro@metempsy.com score_threshold_pct = Param.Percent(25, "Min. threshold to issue a \ 41013735Sivan.pizarro@metempsy.com prefetch. The value is the percentage of sandbox entries to use") 41113786Sjavier.bueno@metempsy.com 41213786Sjavier.bueno@metempsy.comclass STeMSPrefetcher(QueuedPrefetcher): 41313786Sjavier.bueno@metempsy.com type = "STeMSPrefetcher" 41413786Sjavier.bueno@metempsy.com cxx_class = "STeMSPrefetcher" 41513786Sjavier.bueno@metempsy.com cxx_header = "mem/cache/prefetch/spatio_temporal_memory_streaming.hh" 41613786Sjavier.bueno@metempsy.com 41713786Sjavier.bueno@metempsy.com spatial_region_size = Param.MemorySize("2kB", 41813786Sjavier.bueno@metempsy.com "Memory covered by a hot zone") 41913786Sjavier.bueno@metempsy.com active_generation_table_entries = Param.MemorySize("64", 42013786Sjavier.bueno@metempsy.com "Number of entries in the active generation table") 42113786Sjavier.bueno@metempsy.com active_generation_table_assoc = Param.Unsigned(64, 42213786Sjavier.bueno@metempsy.com "Associativity of the active generation table") 42313786Sjavier.bueno@metempsy.com active_generation_table_indexing_policy = Param.BaseIndexingPolicy( 42413786Sjavier.bueno@metempsy.com SetAssociative(entry_size = 1, 42513786Sjavier.bueno@metempsy.com assoc = Parent.active_generation_table_assoc, 42613786Sjavier.bueno@metempsy.com size = Parent.active_generation_table_entries), 42713786Sjavier.bueno@metempsy.com "Indexing policy of the active generation table") 42813786Sjavier.bueno@metempsy.com active_generation_table_replacement_policy = Param.BaseReplacementPolicy( 42913786Sjavier.bueno@metempsy.com LRURP(), "Replacement policy of the active generation table") 43013786Sjavier.bueno@metempsy.com 43113786Sjavier.bueno@metempsy.com pattern_sequence_table_entries = Param.MemorySize("16384", 43213786Sjavier.bueno@metempsy.com "Number of entries in the pattern sequence table") 43313786Sjavier.bueno@metempsy.com pattern_sequence_table_assoc = Param.Unsigned(16384, 43413786Sjavier.bueno@metempsy.com "Associativity of the pattern sequence table") 43513786Sjavier.bueno@metempsy.com pattern_sequence_table_indexing_policy = Param.BaseIndexingPolicy( 43613786Sjavier.bueno@metempsy.com SetAssociative(entry_size = 1, 43713786Sjavier.bueno@metempsy.com assoc = Parent.pattern_sequence_table_assoc, 43813786Sjavier.bueno@metempsy.com size = Parent.pattern_sequence_table_entries), 43913786Sjavier.bueno@metempsy.com "Indexing policy of the pattern sequence table") 44013786Sjavier.bueno@metempsy.com pattern_sequence_table_replacement_policy = Param.BaseReplacementPolicy( 44113786Sjavier.bueno@metempsy.com LRURP(), "Replacement policy of the pattern sequence table") 44213786Sjavier.bueno@metempsy.com 44313786Sjavier.bueno@metempsy.com region_miss_order_buffer_entries = Param.Unsigned(131072, 44413786Sjavier.bueno@metempsy.com "Number of entries of the Region Miss Order Buffer") 44513786Sjavier.bueno@metempsy.com reconstruction_entries = Param.Unsigned(256, 44613786Sjavier.bueno@metempsy.com "Number of reconstruction entries") 447