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.TH "fi_rxd" "7" "2022\-12\-09" "Libfabric Programmer\[cq]s Manual" "#VERSION#"
.hy
.SH NAME
.PP
fi_rxd - The RxD (RDM over DGRAM) Utility Provider
.SH OVERVIEW
.PP
The RxD provider is a utility provider that supports RDM endpoints
emulated over a base DGRAM provider.
.SH SUPPORTED FEATURES
.PP
The RxD provider currently supports \f[I]FI_MSG\f[R] capabilities.
.TP
\f[I]Endpoint types\f[R]
The provider supports only endpoint type \f[I]FI_EP_RDM\f[R].
.PP
\f[I]Endpoint capabilities\f[R] : The following data transfer interface
is supported: \f[I]fi_msg\f[R].
.TP
\f[I]Modes\f[R]
The provider does not require the use of any mode bits but supports core
DGRAM providers that require FI_CONTEXT and FI_MSG_PREFIX.
.TP
\f[I]Progress\f[R]
The RxD provider only supports \f[I]FI_PROGRESS_MANUAL\f[R].
.SH LIMITATIONS
.PP
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.
.PP
No support for multi-recv.
.PP
No support for counters.
.PP
The RxD provider is still under development and is not extensively
tested.
.SH RUNTIME PARAMETERS
.PP
The \f[I]rxd\f[R] provider checks for the following environment
variables:
.TP
\f[I]FI_OFI_RXD_SPIN_COUNT\f[R]
Number of times to read the core provider\[cq]s CQ for a segment
completion before trying to progress sends.
Default is 1000.
.TP
\f[I]FI_OFI_RXD_RETRY\f[R]
Toggles retrying of packets and assumes reliability of individual
packets and will reassemble all received packets.
Retrying is turned on by default.
.TP
\f[I]FI_OFI_RXD_MAX_PEERS\f[R]
Maximum number of peers the provider should prepare to track.
Default: 1024
.TP
\f[I]FI_OFI_RXD_MAX_UNACKED\f[R]
Maximum number of packets (per peer) to send at a time.
Default: 128
.SH SEE ALSO
.PP
\f[C]fabric\f[R](7), \f[C]fi_provider\f[R](7), \f[C]fi_getinfo\f[R](3)
.SH AUTHORS
OpenFabrics.