NAME

The MLX Fabric Provider

OVERVIEW

The mlx provider runs over the UCX library that is currently supported by the Mellanox infiniband fabrics. The mlx provider makes use of UCX tag matching API in order to implement a limited set of the libfabric data transfer APIs, namely, tagged message queue.

Supported UCP API version: 1.0

LIMITATIONS

The mlx provider doesn’t support all the features defined in the libfabric API. Here are some of the limitations:

Endpoint types

Only supported type: FI_RDM

Endpoint capabilities

Endpoints can support the only data transfer capability FI_TAGGED.

Modes

FI_CONTEXT is required. That means, all the requests that generate completions must have a valid pointer to type struct fi_context passed as the operation context.

Threading

The supported mode is FI_THREAD_DOMAIN, i.e. the mlx provider is not thread safe.

Unsupported features

These features are unsupported: connection management, event queue, scalable endpoint, passive endpoint, shared receive context, rma, atomics.

RUNTIME PARAMETERS

SEE ALSO

fabric(7), fi_provider(7),