gem5/configs/ruby/MESI_Three_Level.py
Marc Orr bf80734b2c x86 isa: This patch attempts an implementation at mwait.
Mwait works as follows:
1. A cpu monitors an address of interest (monitor instruction)
2. A cpu calls mwait - this loads the cache line into that cpu's cache.
3. The cpu goes to sleep.
4. When another processor requests write permission for the line, it is
   evicted from the sleeping cpu's cache. This eviction is forwarded to the
   sleeping cpu, which then wakes up.

Committed by: Nilay Vaish <nilay@cs.wisc.edu>
2014-11-06 05:42:22 -06:00

241 lines
9.9 KiB
Python

# Copyright (c) 2006-2007 The Regents of The University of Michigan
# Copyright (c) 2009 Advanced Micro Devices, Inc.
# Copyright (c) 2013 Mark D. Hill and David A. Wood
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# 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;
# neither the name of the copyright holders 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
# OWNER 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.
#
# Authors: Brad Beckmann
# Nilay Vaish
import math
import m5
from m5.objects import *
from m5.defines import buildEnv
from Ruby import create_topology
from Ruby import send_evicts
#
# Note: the L1 Cache latency is only used by the sequencer on fast path hits
#
class L0Cache(RubyCache):
latency = 1
class L1Cache(RubyCache):
latency = 5
#
# Note: the L2 Cache latency is not currently used
#
class L2Cache(RubyCache):
latency = 15
def define_options(parser):
parser.add_option("--num-clusters", type="int", default=1,
help="number of clusters in a design in which there are shared\
caches private to clusters")
return
def create_system(options, full_system, system, dma_ports, ruby_system):
if buildEnv['PROTOCOL'] != 'MESI_Three_Level':
fatal("This script requires the MESI_Three_Level protocol to be built.")
cpu_sequencers = []
#
# The ruby network creation expects the list of nodes in the system to be
# consistent with the NetDest list. Therefore the l1 controller nodes must be
# listed before the directory nodes and directory nodes before dma nodes, etc.
#
l0_cntrl_nodes = []
l1_cntrl_nodes = []
l2_cntrl_nodes = []
dir_cntrl_nodes = []
dma_cntrl_nodes = []
assert (options.num_cpus % options.num_clusters == 0)
num_cpus_per_cluster = options.num_cpus / options.num_clusters
assert (options.num_l2caches % options.num_clusters == 0)
num_l2caches_per_cluster = options.num_l2caches / options.num_clusters
l2_bits = int(math.log(num_l2caches_per_cluster, 2))
block_size_bits = int(math.log(options.cacheline_size, 2))
l2_index_start = block_size_bits + l2_bits
#
# Must create the individual controllers before the network to ensure the
# controller constructors are called before the network constructor
#
for i in xrange(options.num_clusters):
for j in xrange(num_cpus_per_cluster):
#
# First create the Ruby objects associated with this cpu
#
l0i_cache = L0Cache(size = '4096B', assoc = 1, is_icache = True,
start_index_bit = block_size_bits, replacement_policy="LRU")
l0d_cache = L0Cache(size = '4096B', assoc = 1, is_icache = False,
start_index_bit = block_size_bits, replacement_policy="LRU")
l0_cntrl = L0Cache_Controller(version = i*num_cpus_per_cluster + j,
Icache = l0i_cache, Dcache = l0d_cache,
send_evictions = send_evicts(options),
clk_domain=system.cpu[i].clk_domain,
ruby_system = ruby_system)
cpu_seq = RubySequencer(version = i, icache = l0i_cache,
clk_domain=system.cpu[i].clk_domain,
dcache = l0d_cache, ruby_system = ruby_system)
l0_cntrl.sequencer = cpu_seq
l1_cache = L1Cache(size = options.l1d_size, assoc = options.l1d_assoc,
start_index_bit = block_size_bits, is_icache = False)
l1_cntrl = L1Cache_Controller(version = i*num_cpus_per_cluster+j,
cache = l1_cache, l2_select_num_bits = l2_bits,
cluster_id = i, ruby_system = ruby_system)
exec("ruby_system.l0_cntrl%d = l0_cntrl" % (
i*num_cpus_per_cluster+j))
exec("ruby_system.l1_cntrl%d = l1_cntrl" % (
i*num_cpus_per_cluster+j))
#
# Add controllers and sequencers to the appropriate lists
#
cpu_sequencers.append(cpu_seq)
l0_cntrl_nodes.append(l0_cntrl)
l1_cntrl_nodes.append(l1_cntrl)
# Connect the L0 and L1 controllers
l0_cntrl.bufferToL1 = l1_cntrl.bufferFromL0
l0_cntrl.bufferFromL1 = l1_cntrl.bufferToL0
# Connect the L1 controllers and the network
l1_cntrl.requestToL2 = ruby_system.network.slave
l1_cntrl.responseToL2 = ruby_system.network.slave
l1_cntrl.unblockToL2 = ruby_system.network.slave
l1_cntrl.requestFromL2 = ruby_system.network.master
l1_cntrl.responseFromL2 = ruby_system.network.master
for j in xrange(num_l2caches_per_cluster):
l2_cache = L2Cache(size = options.l2_size,
assoc = options.l2_assoc,
start_index_bit = l2_index_start)
l2_cntrl = L2Cache_Controller(
version = i * num_l2caches_per_cluster + j,
L2cache = l2_cache, cluster_id = i,
transitions_per_cycle=options.ports,
ruby_system = ruby_system)
exec("ruby_system.l2_cntrl%d = l2_cntrl" % (
i * num_l2caches_per_cluster + j))
l2_cntrl_nodes.append(l2_cntrl)
# Connect the L2 controllers and the network
l2_cntrl.DirRequestFromL2Cache = ruby_system.network.slave
l2_cntrl.L1RequestFromL2Cache = ruby_system.network.slave
l2_cntrl.responseFromL2Cache = ruby_system.network.slave
l2_cntrl.unblockToL2Cache = ruby_system.network.master
l2_cntrl.L1RequestToL2Cache = ruby_system.network.master
l2_cntrl.responseToL2Cache = ruby_system.network.master
phys_mem_size = sum(map(lambda r: r.size(), system.mem_ranges))
assert(phys_mem_size % options.num_dirs == 0)
mem_module_size = phys_mem_size / options.num_dirs
# Run each of the ruby memory controllers at a ratio of the frequency of
# the ruby system
# clk_divider value is a fix to pass regression.
ruby_system.memctrl_clk_domain = DerivedClockDomain(
clk_domain=ruby_system.clk_domain,
clk_divider=3)
for i in xrange(options.num_dirs):
#
# Create the Ruby objects associated with the directory controller
#
dir_size = MemorySize('0B')
dir_size.value = mem_module_size
dir_cntrl = Directory_Controller(version = i,
directory = RubyDirectoryMemory(
version = i, size = dir_size),
transitions_per_cycle = options.ports,
ruby_system = ruby_system)
exec("ruby_system.dir_cntrl%d = dir_cntrl" % i)
dir_cntrl_nodes.append(dir_cntrl)
# Connect the directory controllers and the network
dir_cntrl.requestToDir = ruby_system.network.master
dir_cntrl.responseToDir = ruby_system.network.master
dir_cntrl.responseFromDir = ruby_system.network.slave
for i, dma_port in enumerate(dma_ports):
#
# Create the Ruby objects associated with the dma controller
#
dma_seq = DMASequencer(version = i,
ruby_system = ruby_system)
dma_cntrl = DMA_Controller(version = i,
dma_sequencer = dma_seq,
transitions_per_cycle = options.ports,
ruby_system = ruby_system)
exec("ruby_system.dma_cntrl%d = dma_cntrl" % i)
exec("ruby_system.dma_cntrl%d.dma_sequencer.slave = dma_port" % i)
dma_cntrl_nodes.append(dma_cntrl)
all_cntrls = l0_cntrl_nodes + \
l1_cntrl_nodes + \
l2_cntrl_nodes + \
dir_cntrl_nodes + \
dma_cntrl_nodes
# Create the io controller and the sequencer
if full_system:
io_seq = DMASequencer(version=len(dma_ports), ruby_system=ruby_system)
ruby_system._io_port = io_seq
io_controller = DMA_Controller(version = len(dma_ports),
dma_sequencer = io_seq,
ruby_system = ruby_system)
ruby_system.io_controller = io_controller
# Connect the dma controller to the network
io_controller.responseFromDir = ruby_system.network.master
io_controller.requestToDir = ruby_system.network.slave
all_cntrls = all_cntrls + [io_controller]
topology = create_topology(all_cntrls, options)
return (cpu_sequencers, dir_cntrl_nodes, topology)