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.