Files
gem5/configs/common/GPUTLBOptions.py
Matt Sinclair 03ddd0b75f gpu-compute: fix GPU TLB outstandingReqs vs. associativity
The GPU TLB maxOutstandingReqs field gets limited by the associativity.
In the current setup, this means that the max outstanding requests is
32 even though the setup is for 64 entries.  Update the associativity
to all 64 entries.

Change-Id: I2104e4647d97bf4d1cf5ac447e38ad6ac6a1a0d8
2024-08-07 16:16:01 -05:00

132 lines
5.4 KiB
Python

# Copyright (c) 2011-2015 Advanced Micro Devices, Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# 2. 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.
#
# 3. Neither the name of the copyright holder 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 HOLDER 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.
def tlb_options(parser):
# ===================================================================
# TLB Configuration
# ===================================================================
parser.add_argument(
"--TLB-config",
type=str,
default="perCU",
help="Options are: perCU (default), mono, 2CU, or perLane",
)
# ===================================================================
# L1 TLB Options (D-TLB, I-TLB, Dispatcher-TLB)
# ===================================================================
parser.add_argument("--L1TLBentries", type=int, default="64")
parser.add_argument("--L1TLBassoc", type=int, default="64")
parser.add_argument(
"--L1AccessLatency",
type=int,
default="1",
help="latency in gpu cycles",
)
parser.add_argument(
"--L1MissLatency",
type=int,
default="750",
help="latency (in gpu cycles) of a page walk, "
"if this is a last level TLB",
)
parser.add_argument("--L1MaxOutstandingReqs", type=int, default="64")
parser.add_argument("--L1AccessDistanceStat", action="store_true")
parser.add_argument("--tot-L1TLB-size", type=int, default="0")
# ===================================================================
# L2 TLB Options
# ===================================================================
parser.add_argument("--L2TLBentries", type=int, default="4096")
parser.add_argument("--L2TLBassoc", type=int, default="64")
parser.add_argument(
"--L2AccessLatency",
type=int,
default="69",
help="latency in gpu cycles",
)
parser.add_argument(
"--L2MissLatency",
type=int,
default="750",
help="latency (in gpu cycles) of a page walk, "
"if this is a last level TLB",
)
parser.add_argument("--L2MaxOutstandingReqs", type=int, default="64")
parser.add_argument("--L2AccessDistanceStat", action="store_true")
# ===================================================================
# L3 TLB Options
# ===================================================================
parser.add_argument("--L3TLBentries", type=int, default="8192")
parser.add_argument("--L3TLBassoc", type=int, default="64")
parser.add_argument(
"--L3AccessLatency",
type=int,
default="150",
help="latency in gpu cycles",
)
parser.add_argument(
"--L3MissLatency",
type=int,
default="750",
help="latency (in gpu cycles) of a page walk",
)
parser.add_argument("--L3MaxOutstandingReqs", type=int, default="64")
parser.add_argument("--L3AccessDistanceStat", action="store_true")
# ===================================================================
# L1 TLBCoalescer Options
# ===================================================================
parser.add_argument("--L1ProbesPerCycle", type=int, default="2")
parser.add_argument("--L1CoalescingWindow", type=int, default="1")
parser.add_argument("--L1DisableCoalescing", action="store_true")
# ===================================================================
# L2 TLBCoalescer Options
# ===================================================================
parser.add_argument("--L2ProbesPerCycle", type=int, default="2")
parser.add_argument("--L2CoalescingWindow", type=int, default="1")
parser.add_argument("--L2DisableCoalescing", action="store_true")
# ===================================================================
# L3 TLBCoalescer Options
# ===================================================================
parser.add_argument("--L3ProbesPerCycle", type=int, default="2")
parser.add_argument("--L3CoalescingWindow", type=int, default="1")
parser.add_argument("--L3DisableCoalescing", action="store_true")