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configs: add option for memory channel intlv.

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Current memory channel interleave is hard-coded to be maximum between 128
and system's cache line size. Making this value configurable enables use
cases with DMA masters accessing at higher than 128 block granularity.

Change-Id: I8123fa307efd3fd8f16c815ee74a84844bb51edb
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/27629
Tested-by: Gem5 Cloud Project GCB service account <345032938727@cloudbuild.gserviceaccount.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>
Maintainer: Bobby R. Bruce <bbruce@ucdavis.edu>
This commit is contained in:
Adrian Herrera
2020-04-06 13:53:03 +01:00
parent 049aaf41f5
commit 4cde1075d6
2 changed files with 6 additions and 3 deletions
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5
configs/common/MemConfig.py
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@@ -1,4 +1,4 @@
# Copyright (c) 2013, 2017 ARM Limited
# Copyright (c) 2013, 2017, 2020 ARM Limited
# All rights reserved.
#
# The license below extends only to copyright in the software and shall
@@ -109,6 +109,7 @@ def config_mem(options, system):
opt_elastic_trace_en = getattr(options, "elastic_trace_en", False)
opt_mem_ranks = getattr(options, "mem_ranks", None)
opt_dram_powerdown = getattr(options, "enable_dram_powerdown", None)
opt_mem_channels_intlv = getattr(options, "mem_channels_intlv", 128)
if opt_mem_type == "HMC_2500_1x32":
HMChost = HMC.config_hmc_host_ctrl(options, system)
@@ -154,7 +155,7 @@ def config_mem(options, system):
# byte granularity, or cache line granularity if larger than 128
# byte. This value is based on the locality seen across a large
# range of workloads.
intlv_size = max(128, system.cache_line_size.value)
intlv_size = max(opt_mem_channels_intlv, system.cache_line_size.value)
# For every range (most systems will only have one), create an
# array of controllers and set their parameters to match their

4
configs/common/Options.py
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@@ -1,4 +1,4 @@
# Copyright (c) 2013-2019 ARM Limited
# Copyright (c) 2013-2020 ARM Limited
# All rights reserved.
#
# The license below extends only to copyright in the software and shall
@@ -110,6 +110,8 @@ def addNoISAOptions(parser):
help="Specify the physical memory size (single memory)")
parser.add_option("--enable-dram-powerdown", action="store_true",
help="Enable low-power states in DRAMCtrl")
parser.add_option("--mem-channels-intlv", type="int",
help="Memory channels interleave")
parser.add_option("--memchecker", action="store_true")