18 Feb
2019
18 Feb
'19
1:40 p.m.
Hi there, I'm using MPICH with ch4:ofi, and I'm wondering how to select which fabric/domain MPICH will open. I can select the provider with MPIR_CVAR_OFI_USE_PROVIDER, but suppose that the provider has two disjoint fabrics with equivalent capabilities. E.g., suppose I have two ethernet NICs connected to private networks: provider: sockets fabric: 192.168.1.0/24 domain: eth0 version: 2.0 type: FI_EP_RDM protocol: FI_PROTO_SOCK_TCP provider: sockets fabric: 10.0.1.0/24 domain: eth1 version: 2.0 type: FI_EP_RDM protocol: FI_PROTO_SOCK_TCP Is there a tunable to pick which will be used? Thanks, Eric