fi_net - The net Fabric Provider

OpenFabrics. Libfabric Programmer’s Manual 2022-12-11 fi_net(7)

fi_net - The net Fabric Provider

The net provider is a developmental fork of the tcp provider focused on improving performance and scala‐ bility of HPC/AI applications, without impacting the stability of the tcp provider. It will be merged back into the tcp provider at a later point in time. See the fi_tcp(7) man page for additional details on the tcp provider.

A full list of supported environment variables and their use can be obtained using the fi_info applica‐ tion. For example, “fi_info -g net” will show all environment variables usable with the net provider.

fabric(7), fi_provider(7), fi_tcp(7), fi_getinfo(3)

The following features are supported EndpointtypesFI_EP_MSG is supported by the net provider. The net provider shares the same msg endpoint proto‐ col as the tcp provider. FI_EP_RDM is supported directly by the net provider, unlike the tcp provider, which requires the use of the ofi_rxm utility provider. The net provider extends its msg endpoint protocol to support rdm endpoints. As a result, the net provider’s rdm endpoint pro‐ tocol is not compatible with the ofi_rxm;tcp layered protocol. Endpointcapabilities The net provider supports FI_MSG, FI_RMA, and FI_TAGGED. SharedRxContext The net provider supports shared receive context Multirecvbuffers The net provider supports multi recv buffers