Provider Feature Matrix v1.18.x

The tables below indicate which features are supported by which in-tree libfabric providers.

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Key

✓ = well supported

* = limited support (e.g., not supported for all endpoint types or not optimal for performance)

❌ = not supported

U = supported through utility provider(s)

R = required mode bit

O = optional mode bit

(no mark) = not applicable or not needed

? = provider hasn't been assessed yet for this feature

C = same as that of Core provider.

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Endpoint Types	gni	nd	psm2	rxd	rxm	shm	tcp	udp	verbs	efa	ucx	usnic	psm3	opx
FI_EP_DGRAM	✓	❌	✓	❌	❌	❌		✓	*	✓	❌	✓	✓	?
FI_EP_MSG	✓	✓	❌	❌	❌	❌	✓	❌	✓	❌	❌	❌	❌	❌
FI_EP_RDM	✓	U	✓	✓	✓	✓	U	U	U	✓	✓	U	✓	✓

Primary Caps	gni	nd	psm2	rxd	rxm	shm	tcp	udp	verbs	efa	ucx	usnic	psm3	opx
FI_ATOMIC	✓	❌	✓	✓	✓	✓	❌	❌	*	❌	❌	❌	✓	✓
FI_COLLECTIVE					✓						❌	❌		❌
FI_DIRECTED_RECV	✓	❌	✓	✓	✓	✓	❌	❌	❌	✓	❌	❌	✓	✓
FI_HMEM						✓			✓	✓	❌	❌	✓	?
FI_MSG	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
FI_MULTICAST	❌	❌	❌	❌	❌	❌		*	❌	❌	❌	❌	❌	❌
FI_NAMED_RX_CTX	✓	❌	✓	❌	❌	❌		❌	❌	❌	❌	❌	✓	❌
FI_RMA	✓	✓	✓	✓	✓	✓	✓	❌	*	*	✓	❌	✓	✓
FI_TAGGED	✓	❌	✓	✓	✓	✓	❌	❌	*	*	✓	❌	✓	✓
FI_VARIABLE_MSG	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌

Primary Mods	gni	nd	psm2	rxd	rxm	shm	tcp	udp	verbs	efa	ucx	usnic	psm3	opx
FI_READ	✓	✓	✓	✓	✓	✓	✓	❌	✓	✓	✓	❌	✓	✓
FI_RECV	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
FI_REMOTE_READ	✓	✓	✓	✓	✓	✓	✓	❌	✓	*	✓	❌	✓	✓
FI_REMOTE_WRITE	✓	✓	✓	✓	✓	✓	✓	❌	✓	*	✓	❌	✓	✓
FI_SEND	✓	✓	✓	✓	✓	✓	✓	✓	✓	*	✓	✓	✓	✓
FI_WRITE	✓	✓	✓	✓	✓	✓	✓	❌	✓	*	✓	❌	✓	✓

Secondary Caps	gni	nd	psm2	rxd	rxm	shm	tcp	udp	verbs	efa	ucx	usnic	psm3	opx
FI_FENCE	✓	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌
FI_LOCAL_COMM	✓	❌	✓	C	C	✓	✓	✓	✓	✓	✓	❌	✓	✓
FI_MULTI_RECV	✓	❌	✓	✓	✓	✓		❌	*	✓	✓	❌	✓	*
FI_REMOTE_COMM	✓	✓	✓	✓	C	❌	✓	✓	✓	✓	✓	✓	✓	✓
FI_RMA_EVENT	✓	❌	✓	✓	❌	✓			❌	❌	❌	❌	✓	?
FI_RMA_PMEM	❌	❌	❌	❌	❌	❌	✓	❌	❌	❌	❌	❌	❌	❌
FI_SHARED_AV			✓	❌	❌	❌				❌	❌	❌	✓	?
FI_SOURCE	✓		✓	✓	✓	✓		✓	❌	✓	❌	✓	✓	✓
FI_SOURCE_ERR	✓		✓		?	❌		?	?	*	❌	❌	✓	?
FI_TRIGGER	✓	❌	✓		❌	❌	❌	❌	❌	❌	❌	❌	✓	?
FI_RMA_PMEM											❌	❌		❌

Modes	gni	nd	psm2	rxd	rxm	shm	tcp	udp	verbs	efa	ucx	usnic	psm3	opx
FI_ASYNC_IOV														R
FI_BUFFERED_RECV
FI_CONTEXT		R	R		O								R
FI_CONTEXT2														R
FI_LOCAL_MR (compat)		R			O				R			R
FI_MSG_PREFIX
FI_NOTIFY_FLAGS_ONLY
FI_RESTRICTED_COMP
FI_RX_CQ_DATA									R

MR Modes	gni	nd	psm2	rxd	rxm	shm	tcp	udp	verbs	efa	ucx	usnic	psm3	opx
FI_MR_ALLOCATED		R			C				R	R	R
FI_MR_ENDPOINT
FI_MR_LOCAL		R			C				R
FI_MR_PROV_KEY		R			C				R	R	R
FI_MR_MMU_NOTIFY
FI_MR_RAW											R
FI_MR_RMA_EVENT
FI_MR_VIRT_ADDR		R			C	O			R	R	R
FI_MR_BASIC (compat)	✓	✓	✓		✓	❌	O	❌	✓	✓	✓		✓
FI_MR_SCALABLE (compat)	✓	❌	✓		C	✓	O	✓	❌	❌	❌	❌	✓	✓

Additional Features	gni	nd	psm2	rxd	rxm	shm	tcp	udp	verbs	efa	ucx	usnic	psm3	opx
FABRIC_DIRECT	✓	❌	✓		❌	❌	❌	❌	❌	❌	❌	❌	✓	✓
FI_RM_ENABLED	✓		✓		✓	✓	✓	✓	*	❌	❌	❌	✓	✓
Scalable endpoints	✓	❌	✓		❌	❌	❌	❌	❌	❌	❌	❌	✓	❌
Counters (local operations)	✓	✓	✓	✓	✓	✓	❌	❌	*	*	✓	❌	✓	✓
Counters (remote operations)			✓	✓		✓	❌	❌			❌	❌	✓	✓

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Note: The following providers are supported and maintained, but feature frozen: bgq, psm, and sockets. See the v1.8 provider feature matrix for API support details. Out of tree and closed source providers are not listed. Please contact those vendors directly.