NAME

       fi_udp - The UDP Fabric Provider

OVERVIEW

       The  UDP  provider  is  a  basic  provider that can be used on any system that supports UDP sockets.  The
       provider is not intended to provide performance improvements over regular  TCP  sockets,  but  rather  to
       allow  application  and provider developers to write, test, and debug their code.  The UDP provider forms
       the foundation of a utility provider that enables the  implementation  of  libfabric  features  over  any
       hardware.

SUPPORTED FEATURES

       The  UDP  provider  supports a minimal set of features useful for sending and receiving datagram messages
       over an unreliable endpoint.

       Endpoint types : The provider supports only endpoint type FI_EP_DGRAM.

       Endpoint capabilities : The following  data  transfer  interface  is  supported:  fi_msg.   The  provider
       supports standard unicast datagram transfers, as well as multicast operations.

       Modes : The provider does not require the use of any mode bits.

       Progress  : The UDP provider supports both FI_PROGRESS_AUTO and FI_PROGRESS_MANUAL, with a default set to
       auto.  However, receive side data buffers are not modified outside of completion processing routines.

LIMITATIONS

       The UDP provider has hard-coded maximums for supported queue sizes and data transfers.  These values  are
       reflected in the related fabric attribute structures

       EPs must be bound to both RX and TX CQs.

       No support for selective completions or multi-recv.

       No support for counters.

RUNTIME PARAMETERS

       No runtime parameters are currently defined.

SEE ALSO

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

AUTHORS

       OpenFabrics.