GPUTLBConfig.py revision 12564
1# 2# Copyright (c) 2011-2015 Advanced Micro Devices, Inc. 3# All rights reserved. 4# 5# For use for simulation and test purposes only 6# 7# Redistribution and use in source and binary forms, with or without 8# modification, are permitted provided that the following conditions are met: 9# 10# 1. Redistributions of source code must retain the above copyright notice, 11# this list of conditions and the following disclaimer. 12# 13# 2. Redistributions in binary form must reproduce the above copyright notice, 14# this list of conditions and the following disclaimer in the documentation 15# and/or other materials provided with the distribution. 16# 17# 3. Neither the name of the copyright holder nor the names of its contributors 18# may be used to endorse or promote products derived from this software 19# without specific prior written permission. 20# 21# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 22# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 25# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31# POSSIBILITY OF SUCH DAMAGE. 32# 33# Author: Lisa Hsu 34# 35 36from __future__ import print_function 37 38# Configure the TLB hierarchy 39# Places which would probably need to be modified if you 40# want a different hierarchy are specified by a <Modify here .. >' 41# comment 42import m5 43from m5.objects import * 44 45def TLB_constructor(level): 46 47 constructor_call = "X86GPUTLB(size = options.L%(level)dTLBentries, \ 48 assoc = options.L%(level)dTLBassoc, \ 49 hitLatency = options.L%(level)dAccessLatency,\ 50 missLatency2 = options.L%(level)dMissLatency,\ 51 maxOutstandingReqs = options.L%(level)dMaxOutstandingReqs,\ 52 accessDistance = options.L%(level)dAccessDistanceStat,\ 53 clk_domain = SrcClockDomain(\ 54 clock = options.GPUClock,\ 55 voltage_domain = VoltageDomain(\ 56 voltage = options.gpu_voltage)))" % locals() 57 return constructor_call 58 59def Coalescer_constructor(level): 60 61 constructor_call = "TLBCoalescer(probesPerCycle = \ 62 options.L%(level)dProbesPerCycle, \ 63 coalescingWindow = options.L%(level)dCoalescingWindow,\ 64 disableCoalescing = options.L%(level)dDisableCoalescing,\ 65 clk_domain = SrcClockDomain(\ 66 clock = options.GPUClock,\ 67 voltage_domain = VoltageDomain(\ 68 voltage = options.gpu_voltage)))" % locals() 69 return constructor_call 70 71def create_TLB_Coalescer(options, my_level, my_index, TLB_name, Coalescer_name): 72 # arguments: options, TLB level, number of private structures for this Level, 73 # TLB name and Coalescer name 74 for i in xrange(my_index): 75 TLB_name.append(eval(TLB_constructor(my_level))) 76 Coalescer_name.append(eval(Coalescer_constructor(my_level))) 77 78def config_tlb_hierarchy(options, system, shader_idx): 79 n_cu = options.num_compute_units 80 # Make this configurable now, instead of the hard coded val. The dispatcher 81 # is always the last item in the system.cpu list. 82 dispatcher_idx = len(system.cpu) - 1 83 84 if options.TLB_config == "perLane": 85 num_TLBs = 64 * n_cu 86 elif options.TLB_config == "mono": 87 num_TLBs = 1 88 elif options.TLB_config == "perCU": 89 num_TLBs = n_cu 90 elif options.TLB_config == "2CU": 91 num_TLBs = n_cu >> 1 92 else: 93 print("Bad option for TLB Configuration.") 94 sys.exit(1) 95 96 #---------------------------------------------------------------------------------------- 97 # A visual representation of the TLB hierarchy 98 # for ease of configuration 99 # < Modify here the width and the number of levels if you want a different configuration > 100 # width is the number of TLBs of the given type (i.e., D-TLB, I-TLB etc) for this level 101 L1 = [{'name': 'sqc', 'width': options.num_sqc, 'TLBarray': [], 'CoalescerArray': []}, 102 {'name': 'dispatcher', 'width': 1, 'TLBarray': [], 'CoalescerArray': []}, 103 {'name': 'l1', 'width': num_TLBs, 'TLBarray': [], 'CoalescerArray': []}] 104 105 L2 = [{'name': 'l2', 'width': 1, 'TLBarray': [], 'CoalescerArray': []}] 106 L3 = [{'name': 'l3', 'width': 1, 'TLBarray': [], 'CoalescerArray': []}] 107 108 TLB_hierarchy = [L1, L2, L3] 109 110 #---------------------------------------------------------------------------------------- 111 # Create the hiearchy 112 # Call the appropriate constructors and add objects to the system 113 114 for i in xrange(len(TLB_hierarchy)): 115 hierarchy_level = TLB_hierarchy[i] 116 level = i+1 117 for TLB_type in hierarchy_level: 118 TLB_index = TLB_type['width'] 119 TLB_array = TLB_type['TLBarray'] 120 Coalescer_array = TLB_type['CoalescerArray'] 121 # If the sim calls for a fixed L1 TLB size across CUs, 122 # override the TLB entries option 123 if options.tot_L1TLB_size: 124 options.L1TLBentries = options.tot_L1TLB_size / num_TLBs 125 if options.L1TLBassoc > options.L1TLBentries: 126 options.L1TLBassoc = options.L1TLBentries 127 # call the constructors for the TLB and the Coalescer 128 create_TLB_Coalescer(options, level, TLB_index,\ 129 TLB_array, Coalescer_array) 130 131 system_TLB_name = TLB_type['name'] + '_tlb' 132 system_Coalescer_name = TLB_type['name'] + '_coalescer' 133 134 # add the different TLB levels to the system 135 # Modify here if you want to make the TLB hierarchy a child of 136 # the shader. 137 exec('system.%s = TLB_array' % system_TLB_name) 138 exec('system.%s = Coalescer_array' % system_Coalescer_name) 139 140 #=========================================================== 141 # Specify the TLB hierarchy (i.e., port connections) 142 # All TLBs but the last level TLB need to have a memSidePort (master) 143 #=========================================================== 144 145 # Each TLB is connected with its Coalescer through a single port. 146 # There is a one-to-one mapping of TLBs to Coalescers at a given level 147 # This won't be modified no matter what the hierarchy looks like. 148 for i in xrange(len(TLB_hierarchy)): 149 hierarchy_level = TLB_hierarchy[i] 150 level = i+1 151 for TLB_type in hierarchy_level: 152 name = TLB_type['name'] 153 for index in range(TLB_type['width']): 154 exec('system.%s_coalescer[%d].master[0] = \ 155 system.%s_tlb[%d].slave[0]' % \ 156 (name, index, name, index)) 157 158 # Connect the cpuSidePort (slave) of all the coalescers in level 1 159 # < Modify here if you want a different configuration > 160 for TLB_type in L1: 161 name = TLB_type['name'] 162 num_TLBs = TLB_type['width'] 163 if name == 'l1': # L1 D-TLBs 164 tlb_per_cu = num_TLBs / n_cu 165 for cu_idx in range(n_cu): 166 if tlb_per_cu: 167 for tlb in range(tlb_per_cu): 168 exec('system.cpu[%d].CUs[%d].translation_port[%d] = \ 169 system.l1_coalescer[%d].slave[%d]' % \ 170 (shader_idx, cu_idx, tlb, cu_idx*tlb_per_cu+tlb, 0)) 171 else: 172 exec('system.cpu[%d].CUs[%d].translation_port[%d] = \ 173 system.l1_coalescer[%d].slave[%d]' % \ 174 (shader_idx, cu_idx, tlb_per_cu, cu_idx / (n_cu / num_TLBs), cu_idx % (n_cu / num_TLBs))) 175 176 elif name == 'dispatcher': # Dispatcher TLB 177 for index in range(TLB_type['width']): 178 exec('system.cpu[%d].translation_port = \ 179 system.dispatcher_coalescer[%d].slave[0]' % \ 180 (dispatcher_idx, index)) 181 elif name == 'sqc': # I-TLB 182 for index in range(n_cu): 183 sqc_tlb_index = index / options.cu_per_sqc 184 sqc_tlb_port_id = index % options.cu_per_sqc 185 exec('system.cpu[%d].CUs[%d].sqc_tlb_port = \ 186 system.sqc_coalescer[%d].slave[%d]' % \ 187 (shader_idx, index, sqc_tlb_index, sqc_tlb_port_id)) 188 189 190 # Connect the memSidePorts (masters) of all the TLBs with the 191 # cpuSidePorts (slaves) of the Coalescers of the next level 192 # < Modify here if you want a different configuration > 193 # L1 <-> L2 194 l2_coalescer_index = 0 195 for TLB_type in L1: 196 name = TLB_type['name'] 197 for index in range(TLB_type['width']): 198 exec('system.%s_tlb[%d].master[0] = \ 199 system.l2_coalescer[0].slave[%d]' % \ 200 (name, index, l2_coalescer_index)) 201 l2_coalescer_index += 1 202 # L2 <-> L3 203 system.l2_tlb[0].master[0] = system.l3_coalescer[0].slave[0] 204 205 return system 206