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README_AMD.md

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Using AMD GPUs

Prerequisites

Running tests

The environment variable BELLMAN_PLATFORM determines which backend will be used.

To use the AMD backend, you can do something like:

export BELLMAN_PLATFORM="AMD Accelerated Parallel Processing"
RUST_LOG=info cargo test --features gpu -- --exact multiexp::gpu_multiexp_consistency --nocapture

Notes

  • We had trouble in Ubuntu 20.04 when running a single computer with both NVIDIA and AMD cards.
  • The initial kernel compilation may take > 60sec at start up. This is not a problem afterwards. A possible mitigation would be to add kernel binary caching in the ocl-fil crate.