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doca-urom

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Host-side DOCA UROM library (doca_urom_*): offload an HPC / UCX / MPI application's remote memory operations (puts, gets, atomics, collectives) from the host CPU onto a BlueField DPU. Trigger on "MPI all-reduce burning host CPU", "push UCX traffic onto the BlueField", "first doca_urom call returns NOT_PERMITTED", or "host library and DPU service look out of sync", even without naming DOCA UROM. An offload needs both halves: this host library and the UROM Service on the DPU (doca-urom-svc), which owns deploying that container. Covers creating UROM Service contexts (doca_urom_service_*) and Worker contexts (doca_urom_worker_*) that run plugins on the DPU, discovering plugins via doca_urom_service_get_plugins_list, progressing completions, and DOCA_ERROR_* from doca_urom_* calls. Route elsewhere for UROM Service deployment on the DPU side, MPI / UCX collective algorithm design, and RDMA / RoCE / IB substrate bring-up.

When to use

• offloading HPC / UCX / MPI remote memory operations
• creating UROM Service contexts
• creating Worker contexts
• discovering plugins via doca_urom_service_get_plugins_list
• progressing completions
• debugging DOCA_ERROR_* from doca_urom_* calls
• pushing UCX traffic onto the BlueField
• resolving NOT_PERMITTED errors

When not to use

• UROM Service deployment on the DPU side
• MPI / UCX collective algorithm design
• RDMA / RoCE / IB substrate bring-up

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