Hello
Have generated an ARM ISA gem5.opt executable, where the PROTOCOL CHI.
Running the simple "Hello World" program on a config of [4 RNFs, 2 HNFs, 2
SNFs] and looking at the config.ini file, there are a few things I don't
understand.
The command I use being:
./build/ARM/gem5.opt configs/example/se.py --ruby --topology=Pt2Pt --num-cpus=4
--num-dirs=2 --num-l3caches=2 --cmd=tests/test-progs/hello/bin/arm/linux/hello
>From config.ini, we have
[system]
type=System
children=clk_domain cpu0 cpu1 cpu2 cpu3 cpu_clk_domain cpu_voltage_domain
dvfs_handler mem_ctrls0 mem_ctrls1 redirect_paths0 redirect_paths1
redirect_paths2 ruby sys_port_proxy voltage_domain workload
:
mem_mode=timing
mem_ranges=0:536870912 <== Memory is 512 MBytes
memories=system.mem_ctrls0.dram system.mem_ctrls1.dram
[system.ruby]
type=RubySystem
children=clk_domain hnf0 hnf1 network power_state rnf0 rnf1 rnf2 rnf3 snf0 snf1
<== So have instantiated the 4 x RNFs, 2 x HNFs, 2 x SNFs
access_backing_store=false
all_instructions=false
block_size_bytes=64
clk_domain=system.ruby.clk_domain
eventq_index=0
hot_lines=false
memory_size_bits=48
num_of_sequencers=4
number_of_virtual_networks=4
phys_mem=Null
power_model=
power_state=system.ruby.power_state
randomization=false
system=system
[system.ruby.hnf0.cntrl]
type=Cache_Controller
children=cache datIn datOut mandatoryQueue power_state prefetchQueue
replTriggerQueue reqIn reqOut reqRdy retryTriggerQueue rspIn rspOut snpIn
snpOut snpRdy triggerQueue
addr_ranges=0:536870912:0:64 <== What does this mean?? (range is 0: 512 Mbytes.
What does :0:64 imply??) (Similar query for system.ruby.hnf1.cntrl.addr_range)
:
downstream_destinations=system.ruby.snf0.cntrl system.ruby.snf1.cntrl <== If I
wanted a configuration where hnf0.cntrl only communicated to
system.ruby.snf0.cntrl, would I need to generate a custom version of
CHI_configs.py or do I need to provide a custom version of CHI.py and
CHI_configs.py?
[system.ruby.hnf0.cntrl.cache]
type=RubyCache
children=replacement_policy
assoc=16
block_size=0 <== Why is the block size 0 ??
:
Thanks in advance
JO
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