Provider Feature Matrix v1.3.x

The tables below indicate which features are supported by which in-tree libfabric providers. Please update the tables as appropriate if you see a box that hasn't been assessed or an incorrect mark in one of the boxes.

---

Key

✓ = well supported

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

❌ = not supported

R = required mode bit

O = optional mode bit

(no mark) = not applicable or not needed

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

---

Endpoint Types	gni	mxm	psm	psm2	sockets	udp	usnic	verbs
FI_EP_DGRAM	✓	❌	✓	✓	✓	✓	✓	❌
FI_EP_MSG	❌	❌	❌	❌	✓	❌	*	✓
FI_EP_RDM	✓	*	✓	✓	✓	❌	*	*

Primary Capabilities	gni	mxm	psm	psm2	sockets	udp	usnic	verbs
FI_MSG	✓	❌	✓	✓	✓	✓	✓	✓
FI_RMA	✓	❌	✓	✓	✓	❌	❌	*
FI_TAGGED	✓	✓	✓	✓	✓	❌	❌	*
FI_ATOMIC	✓	❌	✓	✓	✓	❌	❌	*
FI_NAMED_RX_CTX	❌	❌	❌	❌	✓	❌	❌	❌
FI_DIRECTED_RECV	✓	❌	❌	✓	✓	❌	❌	❌
FI_READ	✓	❌	✓	✓	✓	❌	❌	✓
FI_WRITE	✓	❌	✓	✓	✓	❌	❌	✓
FI_SEND	✓	❌	✓	✓	✓	✓	*	✓
FI_RECV	✓	❌	✓	✓	✓	✓	*	✓
FI_REMOTE_READ	✓	❌	✓	✓	✓	❌	❌	✓
FI_REMOTE_WRITE	✓	❌	✓	✓	✓	❌	❌	✓

Secondary Capabilities	gni	mxm	psm	psm2	sockets	udp	usnic	verbs
FI_MULTI_RECV	✓	❌	✓	✓	✓	❌	❌	❌
FI_SOURCE	✓	❌	❌	✓	✓	✓	✓	❌
FI_RMA_EVENT	*	❌	✓	✓	✓	❌	❌	❌
FI_TRIGGER	❌	❌	✓	✓	✓	❌	❌	❌
FI_FENCE	✓	❌	❌	❌	✓	❌	❌	❌

Modes	gni	mxm	psm	psm2	sockets	udp	usnic	verbs
FI_CONTEXT		R	R	R				O
FI_LOCAL_MR							R	R
FI_MSG_PREFIX							R
FI_ASYNC_IOV
FI_RX_CQ_DATA								R

Memory Registration Modes	gni	mxm	psm	psm2	sockets	udp	usnic	verbs
FI_MR_BASIC	✓	✓	✓	✓	✓	❌	✓	✓
FI_MR_SCALABLE	❌	❌	✓	✓	✓	✓	❌	❌

Additional Features	gni	mxm	psm	psm2	sockets	udp	usnic	verbs
FABRIC_DIRECT	✓	❌	❌	❌	✓	❌	❌	❌
FI_RM_ENABLED	✓	✓	✓	✓	✓	✓	❌	*
Scalable endpoints	❌	❌	❌	❌	✓	❌	❌	❌
Counters	✓	❌	✓	✓	✓	❌	❌	❌