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BabelStream/JuliaStream.jl/README.md
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JuliaStream.jl

This is an implementation of BabelStream in Julia which contains the following variants:

  • PlainStream.jl - Single threaded for
  • ThreadedStream.jl - Threaded implementation with Threads.@threads macros
  • DistributedStream.jl - Process based parallelism with @distributed macros
  • CUDAStream.jl - Direct port of BabelStream's native CUDA implementation using CUDA.jl
  • AMDGPUStream.jl - Direct port of BabelStream's native HIP implementation using AMDGPU.jl

Build & Run

Prerequisites

  • Julia >= 1.6+

With Julia on path, run the benchmark with:

> cd JuliaStream.jl
> julia --project -e 'import Pkg; Pkg.instantiate()' # only required on first run
> julia --project src/<IMPL>Stream.jl

Important:

  • Julia is 1-indexed, so N >= 1 in --device N.
  • Thread count for ThreadedStream must be set via the JULIA_NUM_THREADS environment variable (e.g export JULIA_NUM_THREADS=$(nproc)) otherwise it defaults to 1.
  • Worker count for DistributedStream is set with -p <N> as per the documentation.
  • Certain implementations such as CUDA and AMDGPU will do hardware detection at runtime and may download and/or compile further software packages for the platform.