Provider Feature Matrix v1.21.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

H = required mode bit for HMEM support

(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	psm2	rxd	rxm	shm	tcp	udp	verbs	efa	ucx	psm3	opx	cxi
FI_EP_DGRAM	✓	❌	❌	❌	❌	✓	*	✓	❌	✓	*	❌
FI_EP_MSG	❌	❌	❌	❌	✓	❌	✓	❌	❌	❌	❌	❌
FI_EP_RDM	✓	✓	✓	✓	✓	U	U	✓	✓	✓	✓	✓

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

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

Secondary Caps	psm2	rxd	rxm	shm	tcp	udp	verbs	efa	ucx	psm3	opx	cxi
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	✓		❌	❌	❌	❌	❌	❌	❌	✓	?	✓

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

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

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

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