Optimized Filecoin PC2

Standalone C++ GPU implementation of Filecoin's PreCommit2 function

This repository is for demonstration purposes only. Feel free to modify as needed to support your specific setup.

Build and Running

1. ./build.sh
2. ./run_pc2 -i <path> -o <path> -s <sector_size>
-i Directory containing all the layer data files from PC1
-o Output directory for tree c and tree r data
-s Sector size, for example 2KiB or 32GiB

Various Notes

• The pc2 performance for 32GB sectors is ~150 seconds (2.5 min) on a 3090 GPU.
• Currently only CC sectors are supported. In order to work with non-CC sectors, the code needs to be updated to add the piece_file with the final layer prior to building tree r.
• The test includes timed pinned memory allocation and deallocation. If used in an application, the pinning only needs to performed once then reused across many different sectors.
• The test will check the tree c and tree r output data against the files in the input path. If run on non-CC sectors then tree c should match although tree r will fail.