The pulp_cluster repository contains the structure of the cluster subsystem used in PULP chips. For more details on the internal architecture, see the README.md in the pulp repository.

The doc folder contains the draw.io schematic shown above, as well as the raw source to allow for updates, outlining the most important components in pulp_cluster, as well as the communication interfaces connecting these. While not a complete overview of all signals, this is meant as a slightly more detailed overview that can assist in development. Please be aware that the schematic may not be 100% accurate.

It is possible to run benchmarks on the cluster, either within PULP or as a separate IP. For simulation within PULP, you can directly go to the PULP repo and follow the README.

To simulate the cluster on its own, you can perform the following steps:

1. Make sure the PULP RV32 toolchain is in your PATH. Please refer to PULP RISCV GCC toolchain to use a pre-built release.

2. We need RV64 toolchain to compile DPI libraries. Export it to a RISCV env variable. Please refer to RISC-V GNU toolchain to use a pre-built release.

3. Compile the hw:

   make checkout
   make scripts/compile.tcl
   make build
   

4. Source the environment:

   source env/env.sh
   

5. Download the sw stack and bare-metal tests:

   make pulp-runtime
   make regression-tests
   

6. Run the tests. Choose any test among the parallel_bare_tests and the mchan_tests, move into the related folder and do:

   make clean all run
   

   To use the GUI, add gui=1 to the previous command.