fi_rxd(7)

NAME

fi_rxd - The RxD (RDM over DGRAM) Utility Provider

OVERVIEW

The RxD provider is a utility provider that supports RDM endpoints emulated over a base DGRAM provider.

SUPPORTED FEATURES

The RxD provider currently supports FI_MSG capabilities.

Endpoint types
    The provider supports only endpoint type FI_EP_RDM.

Endpoint capabilities : The following data transfer interface is supported: fi_msg.

Modes
    The provider does not require the use of any mode bits but supports core DGRAM providers that require FI_CONTEXT and FI_MSG_PREFIX.

Progress
    The RxD provider only supports FI_PROGRESS_MANUAL.

LIMITATIONS

The RxD provider has hard-coded maximums for supported queue sizes and data transfers. Some of these limits are set based on the selected base DGRAM provider.

No support for multi-recv.

No support for counters.

The RxD provider is still under development and is not extensively tested.

RUNTIME PARAMETERS

The rxd provider checks for the following environment variables:

FI_OFI_RXD_SPIN_COUNT
    Number of times to read the core provider's CQ for a segment completion before trying to progress sends. Default is 1000.

FI_OFI_RXD_RETRY
    Toggles retrying of packets and assumes reliability of individual packets and will reassemble all received packets. Retrying is turned on by default.

FI_OFI_RXD_MAX_PEERS
    Maximum number of peers the provider should prepare to track. Default: 1024

FI_OFI_RXD_MAX_UNACKED
    Maximum number of packets (per peer) to send at a time. Default: 128

SEE ALSO

fabric(7), fi_provider(7), fi_getinfo(3)

AUTHORS
OpenFabrics.