gem5/ext/sst/tests/test6_arm_4c.py
Curtis Dunham c3268f8820 config: Support full-system with SST's memory system
This patch adds an example configuration in ext/sst/tests/ that allows
an SST/gem5 instance to simulate a 4-core AArch64 system with SST's
memHierarchy components providing all the caches and memories.
2015-04-08 15:56:06 -05:00

199 lines
7.4 KiB
Python

# Copyright (c)2015 ARM Limited
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# met: redistributions of source code must retain the above copyright
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# Authors: Curtis Dunham
import sst
import sys
import os
lat="1 ns"
buslat="2 ns"
clockRate = "1GHz"
def getenv(name):
res = ""
try:
res = os.environ[name]
except KeyError:
pass
return res
baseCacheParams = ({
"debug" :getenv("DEBUG"),
"debug_level" : 6,
"coherence_protocol" : "MSI",
"replacement_policy" : "LRU",
"cache_line_size" : 64,
"cache_frequency" : clockRate,
"statistics" : 1
})
l1CacheParams = ({
"debug" : getenv("DEBUG"),
"debug_level" : 6,
"L1" : 1,
"cache_size" : "64 KB",
"associativity" : 4,
"access_latency_cycles" : 2,
"low_network_links" : 1
})
l2CacheParams = ({
"debug" : getenv("DEBUG"),
"debug_level" : 6,
"L1" : 0,
"cache_size" : "256 KB",
"associativity" : 8,
"access_latency_cycles" : 8,
"high_network_links" : 1,
"mshr_num_entries" : 4096,
"low_network_links" : 1
})
GEM5 = sst.Component("system", "gem5.gem5")
GEM5.addParams({
"comp_debug" : getenv("GEM5_DEBUG"),
"gem5DebugFlags" : getenv("M5_DEBUG"),
"frequency" : clockRate,
"cmd" : "configs/example/fs.py --num-cpus 4 --disk-image=vexpress64-openembedded_minimal-armv8_20130623-376.img --root-device=/dev/sda2 --kernel=vmlinux.aarch64.20140821 --dtb-filename=vexpress.aarch64.20140821.dtb --mem-size=256MB --machine-type=VExpress_EMM64 --cpu-type=timing --external-memory-system=sst --initialize-only"
})
bus = sst.Component("membus", "memHierarchy.Bus")
bus.addParams({
"bus_frequency": "2GHz",
"debug" : getenv("DEBUG"),
"debug_level" : 8
})
def buildL1(name, m5, connector):
cache = sst.Component(name, "memHierarchy.Cache")
cache.addParams(baseCacheParams)
cache.addParams(l1CacheParams)
link = sst.Link("cpu_%s_link"%name)
link.connect((m5, connector, lat), (cache, "high_network_0", lat))
return cache
SysBusConn = buildL1("gem5SystemBus", GEM5, "system.external_memory.port")
bus_port = 0
link = sst.Link("sysbus_bus_link")
link.connect((SysBusConn, "low_network_0", buslat), (bus, "high_network_%u" % bus_port, buslat))
bus_port = bus_port + 1
ioCache = buildL1("ioCache", GEM5, "system.iocache.port")
ioCache.addParams({
"debug" : 0,
"debug_level" : 6,
"cache_size" : "16 KB",
"associativity" : 4
})
link = sst.Link("ioCache_bus_link")
link.connect((ioCache, "low_network_0", buslat), (bus, "high_network_%u" % bus_port, buslat))
def buildCPU(m5, num):
l1iCache = buildL1("cpu%u.l1iCache" % num, m5, "system.cpu%u.icache.port" % num)
l1dCache = buildL1("cpu%u.l1dCache" % num, m5, "system.cpu%u.dcache.port" % num)
itlbCache = buildL1("cpu%u.itlbCache" % num, m5, "system.cpu%u.itb_walker_cache.port" % num)
dtlbCache = buildL1("cpu%u.dtlbCache" % num, m5, "system.cpu%u.dtb_walker_cache.port" % num)
l1dCache.addParams({
"debug" : 0,
"debug_level" : 10,
"snoop_l1_invalidations" : 1
})
global bus_port
link = sst.Link("cpu%u.l1iCache_bus_link" % num) ; bus_port = bus_port + 1
link.connect((l1iCache, "low_network_0", buslat), (bus, "high_network_%u" % bus_port, buslat))
link = sst.Link("cpu%u.l1dCache_bus_link" % num) ; bus_port = bus_port + 1
link.connect((l1dCache, "low_network_0", buslat), (bus, "high_network_%u" % bus_port, buslat))
link = sst.Link("cpu%u.itlbCache_bus_link" % num) ; bus_port = bus_port + 1
link.connect((itlbCache, "low_network_0", buslat), (bus, "high_network_%u" % bus_port, buslat))
link = sst.Link("cpu%u.dtlbCache_bus_link" % num) ; bus_port = bus_port + 1
link.connect((dtlbCache, "low_network_0", buslat), (bus, "high_network_%u" % bus_port, buslat))
buildCPU(GEM5, 0)
buildCPU(GEM5, 1)
buildCPU(GEM5, 2)
buildCPU(GEM5, 3)
l2cache = sst.Component("l2cache", "memHierarchy.Cache")
l2cache.addParams(baseCacheParams)
l2cache.addParams(l2CacheParams)
l2cache.addParams({
"network_address" : "2",
"directory_at_next_level" : "1"
})
link = sst.Link("l2cache_bus_link")
link.connect((l2cache, "high_network_0", buslat), (bus, "low_network_0", buslat))
memory = sst.Component("memory", "memHierarchy.MemController")
memory.addParams({
"request_width" : 64,
"coherence_protocol" : "MSI",
"access_time" : "25 ns",
"backend.mem_size" : 256,
"clock" : "2GHz",
"debug" : getenv("DEBUG"),
"range_start" : 0, # 2 * (1024 ** 3), # it's behind a directory controller.
})
comp_chiprtr = sst.Component("chiprtr", "merlin.hr_router")
comp_chiprtr.addParams({
"xbar_bw" : "16GB/s",
"link_bw" : "16GB/s",
"input_buf_size" : "1KB",
"num_ports" : "3",
"flit_size" : "72B",
"output_buf_size" : "1KB",
"id" : "0",
"topology" : "merlin.singlerouter"
})
comp_dirctrl = sst.Component("dirctrl", "memHierarchy.DirectoryController")
comp_dirctrl.addParams({
"coherence_protocol" : "MSI",
"network_address" : "1",
"entry_cache_size" : "16384",
"network_bw" : "1GB/s",
"addr_range_start" : 2 * (1024 ** 3),
"addr_range_end" : 2 * (1024 ** 3) + 256 * (1024 ** 2)
})
sst.Link("link_cache_net_0").connect((l2cache, "directory", "10ns"), (comp_chiprtr, "port2", "2ns"))
sst.Link("link_dir_net_0").connect((comp_chiprtr, "port1", "2ns"), (comp_dirctrl, "network", "2ns"))
sst.Link("l2cache_io_link").connect((comp_chiprtr, "port0", "2ns"), (GEM5, "network", buslat))
sst.Link("link_dir_mem_link").connect((comp_dirctrl, "memory", "10ns"), (memory, "direct_link", "10ns"))