NAME¶

fi_ucx - The UCX Fabric Provider

OVERVIEW¶

The ucx provider runs over the UCX library that is currently supported by the NVIDIA Infiniband fabrics. The ucx provider makes use of UCX tag matching API in order to implement a limited set of the libfabric data transfer APIs.

Supported UCP API version: 1.0

LIMITATIONS¶

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

Endpoint types

The only supported type is FI_EP_RDM.

Endpoint capabilities

Endpoints support data transfer capabilities FI_MSG, FI_TAGGED, FI_RMA and FI_MULTI_RECV.

Threading

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

RUNTIME PARAMETERS¶

FI_UCX_CONFIG

The path to the UCX configuration file (default: none).

FI_UCX_TINJECT_LIMIT

Maximal tinject message size (default: 1024).

FI_UCX_NS_ENABLE

Enforce usage of name server functionality for UCX provider (default: disabled).

FI_UCX_NS_PORT

UCX provider’s name server port (default: 12345).

FI_UCX_NS_IFACE

IPv4 network interface for UCX provider’s name server (default: any).

FI_UCX_CHECK_REQ_LEAK

Check request leak (default: disabled).

SEE ALSO¶

fabric(7), fi_provider(7),

AUTHORS¶

OpenFabrics.