Aurelien Bouteiller

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AMD adds GPU-initiated SDMA copy engines to RCCL and rocSHMEM

Co-authored the November 2026 announcement

AMD now lets a running GPU kernel hand large data transfers to dedicated System Direct Memory Access (SDMA) copy engines, instead of having compute units (CUs) execute every load and store. The feature is in RCCL, AMD's ROCm Communication Collectives Library, and rocSHMEM, its GPU networking library. Both are part of the ROCm software stack, and the feature is available in version 10.1.

Updated 1 hour ago