Hi Srikant, Thank you so much for answering my questions and providing the reference file.
Since I am new to NoC simulation and using Garnet 3.0 (HeteroGarnet), I feel a little lost regarding running a SE or FS mode simulation. I checked the documentation on Gem5 posted ( https://www.gem5.org/documentation/general_docs/ruby/heterogarnet/) and read the Kite paper (https://dl.acm.org/doi/abs/10.5555/3437539.3437683). Nevertheless I could not figure out how to run a simulation (specifically in SE mode) where I can use the topology you provided. I am using the deprecated se.py file in the following manner: build/X86/gem5.opt configs/deprecated/example/se.py --num-cpus=4 --num-dirs=4 --cpu-type=DerivO3CPU --cpu-clock=2.5GHz --caches --l1d_size=64kB --l1d_assoc=8 --l1i_size=32kB --l1i_assoc=8 --mem-type=SimpleMemory --mem-size=8GB --ruby --network=garnet --topology=KiteLarge_EWMC --mesh-rows=2 --cmd=</path/to/binary> --options="<binary args>" When I run this command, I get the following message: ======================================================================= gem5 Simulator System. https://www.gem5.org gem5 is copyrighted software; use the --copyright option for details. gem5 version 23.1.0.0 gem5 compiled Feb 19 2024 14:33:34 gem5 started Feb 22 2024 14:48:41 command line: build/X86/gem5.opt configs/deprecated/example/se.py --num-cpus=4 --num-dirs=4 --cpu-type=DerivO3CPU --cpu-clock=2.5GHz --caches --l1d_size=64kB --l1d_assoc=8 --l1i_size=32kB --l1i_assoc=8 --mem-type=SimpleMemory --mem-size=8GB --ruby --network=garnet --topology=KiteLarge_EWMC --mesh-rows=2 --cmd=</path/to/binary> '--options=<binary args>' warn: The se.py script is deprecated. It will be removed in future releases of gem5. TypeError: makeTopology() missing 1 required positional argument: 'Router' At: gem5/configs/ruby/Ruby.py(262): create_system configs/deprecated/example/se.py(268): <module> src/python/m5/main.py(669): main ======================================================================== I understand that the se.py file may not be equipped to run a HeteroGarnet simulation, but I could not find any other simulation files that would help me. I would really appreciate it if you could help me find a simulation file along with any modifications needed to Gem5 to support a simulation with the Kite Large topology. Thank you again for your help. Sincerely, Preet. On Wed, Feb 21, 2024 at 8:08 PM Srikant Bharadwaj <srikan...@gmail.com> wrote: > Hi Preet, > 1. I am attaching a config file for Kite Large topology that you can use > as a reference for building chiplet-based topologies. More info on Kite > Large can be found in this paper: > https://dl.acm.org/doi/abs/10.5555/3437539.3437683 > 2. HeteroGarnet only handles the network traffic. So HeteroGarnet is can > handle any thread pinning that happens on the core levels as long as the > cores are connected to each other using a topology and Heterogarnet is > enabled. > 3. Yes, you can perform SE mode simulations as well as Garnet standalone > simulations with HeteroGarnet. Let me know if you have any questions. > > Thanks, > Srikant > > > > On Wed, Feb 21, 2024 at 1:55 PM Preet Derasari via gem5-users < > gem5-users@gem5.org> wrote: > >> Dear Dr. Krishna, >> >> Thank you so much for your response. >> >> I read the documentation you linked to in your email and have a few >> questions. >> 1. Are there any example config files that you are aware of that can help >> me start with chiplet simulation (with some basic routing techniques and >> topologies)? If so, could you point me to them? >> 2. How does HeteroGarnet assign processing and other nodes to an >> application? Can I use methods like CPUSET() in C++ to assign a simulated >> core (node) to a thread (created using thread)? >> 3. Can I perform SE mode simulations of my applications, or is >> HeteroGarnet only applicable to FS (or the new gem5 v22 "boards")? >> >> I really appreciate your help. >> >> Thank you. Sincerely, >> Preet. >> >> >> On Wed, Feb 21, 2024 at 11:24 AM Krishna, Tushar <tus...@ece.gatech.edu> >> wrote: >> >>> The latest version of garnet in the gem5 repo allows you to model >>> multi-chiplet NoCs. *[The gem5_chips repo is deprecated - and was >>> actually forked off an earlier version of HeteroGarnet].* >>> Here is its documentation on the gem5 wiki: >>> https://www.gem5.org/documentation/general_docs/ruby/heterogarnet/ >>> >>> Best, >>> Tushar >>> On Feb 21, 2024 at 11:17 AM -0500, Preet Derasari via gem5-users < >>> gem5-users@gem5.org>, wrote: >>> >>> Hi, >>> >>> Does anyone know how to do a chiplet based simulation on the latest Gem5 >>> version with garnet? >>> >>> My basic requirements are: running distributed C++ applications (using >>> multi-threading) on the Gem5 O3CPYU type, having the ability to control the >>> number of cores on individual chiplet dies (even one core per die is >>> sufficient), control the D-to-D bandwidth, and getting various statistics >>> including power consumption per die and in the interposer, overall latency >>> of communication between dies. >>> >>> On the other hand these are optional: configuring a package with >>> different topologies (mesh XY, butterfly, etc), possibly different >>> packaging techniques (like 2D, 2.5D, 3D), simulate heterogenous components >>> like GPU with CPU, and other NoC parameters like flit with, interposer >>> width, etc. >>> >>> I tried an older version of Gem5 from Dr. Tushar Krishna's group called >>> gem5_chips (https://github.com/GT-CHIPS/gem5_chips) but I had to use an >>> older version of Python (2.7) and GCC (8) to even compile Gem5 on an Ubuntu >>> 20.04 system. Despite that I was not able to run their benchmark beyond a >>> certain instruction limit (using max-insts) since the simulator started >>> throwing assertion errors in the garnet2.0/OutVcState.cc code. >>> >>> I would really appreciate it if someone can point me towards the right >>> direction here. >>> >>> Thank you. Best regards, >>> Preet. >>> >>> _______________________________________________ >> gem5-users mailing list -- gem5-users@gem5.org >> To unsubscribe send an email to gem5-users-le...@gem5.org >> >
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