App Feature Requirements

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arun ilango edited this page Apr 17, 2019 · 4 revisions

The tables below indicate which features are required by the libfabric utility providers and select applications.

Key

✓ = feature required for minimal use

* = feature required for general use or desired for performance

H = Supported mode bit, hidden from higher layers

S = Supported mode bit, passed through if higher layer handles, else hidden

P = Pass-through mode bit, higher layers must support

(no mark) = not applicable or not needed / in-case of mode bits: cannot pass-through or undefined behavior

Endpoint Types	rxd	rxm
`FI_EP_DGRAM`	✓
`FI_EP_MSG`		✓
`FI_EP_RDM`

Primary Capabilities	rxd	rxm
`FI_ATOMIC`
`FI_DIRECTED_RECV`
`FI_MSG`	✓	✓
`FI_MULTICAST`
`FI_NAMED_RX_CTX`
`FI_READ`		✓
`FI_RECV`	✓	✓
`FI_REMOTE_READ`		✓
`FI_REMOTE_WRITE`		✓
`FI_RMA`		✓
`FI_SEND`	✓	✓
`FI_TAGGED`
`FI_WRITE`		✓
`FI_VARIABLE_MSG`

Secondary Capabilities	rxd	rxm
`FI_FENCE`
`FI_LOCAL_COMM`	*	*
`FI_MULTI_RECV`
`FI_REMOTE_COMM`	*	*
`FI_RMA_EVENT`
`FI_RMA_PMEM`
`FI_SHARED_AV`
`FI_SOURCE`
`FI_SOURCE_ERR`
`FI_TRIGGER`

Modes	rxd	rxm
`FI_ASYNC_IOV`
`FI_BUFFERED_RECV`
`FI_CONTEXT`	H
`FI_CONTEXT2`
`FI_LOCAL_MR (compat)`		S
`FI_MSG_PREFIX`	H
`FI_NOTIFY_FLAGS_ONLY`
`FI_RESTRICTED_COMP`
`FI_RX_CQ_DATA`		H

Memory Registration Modes	rxd	rxm
`FI_MR_ALLOCATED`		P
`FI_MR_ENDPOINT`
`FI_MR_LOCAL`	S	S
`FI_MR_PROV_KEY`		P
`FI_MR_MMU_NOTIFY`
`FI_MR_RAW`
`FI_MR_RMA_EVENT`
`FI_MR_VIRT_ADDR`		P
`FI_MR_BASIC (compat)`		✓
`FI_MR_SCALABLE (compat)`		✓

Additional Features	rxd	rxm
FABRIC_DIRECT
FI_RM_ENABLED		✓¹
Scalable endpoints
Counters (local operations)
Counters (remote operations)

¹ rxm requires RM enabled for every resource except CQ from underlying FI_EP_MSG provider.