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.
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