fi_info(1)

NAME

fi_info - Simple utility to query for fabric interfaces

SYNOPSIS

     fi_info [OPTIONS]

DESCRIPTION

The fi_info utility can be used to query for available fabric interfaces. The utility supports filtering based on a number of options such as endpoint type, provider name, or supported modes. Additionally, fi_info can also be used to discover the environment variables that can be used to tune provider specific parameters. If no filters are specified, then all available fabric interfaces for all providers and endpoint types will be returned.

OPTIONS

  Filtering

-n, –node=<NAME>
    Node name or address used to filter interfaces. Only interfaces which can reach the given node or address will respond.

-P, –port=<PORT>
    Port number used to filter interfaces.

-c, –caps=<CAP1|CAP2>..
    Pipe separated list of capabilities used to filter interfaces. Only interfaces supporting all of the given capabilities will respond. For more information on capabilities, see fi_getinfo(3).

-m, –mode=<MOD1|MOD2>..
    Pipe separated list of modes used to filter interfaces. Only interfaces supporting all of the given modes will respond. For more information on, modes see fi_getinfo(3).

-t, –ep_type=<EPTYPE>
    Specifies the type of fabric interface communication desired. For example, specifying FI_EP_DGRAM would return only interfaces which support unreliable datagram. For more information on endpoint types, see fi_endpoint(3).

-a, –addr_format=<FMT>
    Filter fabric interfaces by their address format. For example, specifying FI_SOCKADDR_IN would return only interfaces which use sockaddr_in structures for addressing. For more information on address formats, see fi_getinfo(3).

-p, –provider=<PROV>
    Filter fabric interfaces by the provider implementation. For a list of providers, see the --list option.

-d, –domain=<DOMAIN>
    Filter interfaces to only those with the given domain name.

-f, –fabric=<FABRIC>
    Filter interfaces to only those with the given fabric name.

  Discovery

-e, –env
    List libfabric related environment variables which can be used to enable extra configuration or tuning.

*-g [filter]
    Same as -e option, with output limited to environment variables containing filter as a substring.

-l, –list
    List available libfabric providers.

-v, –verbose
    By default, fi_info will display a summary of each of the interfaces discovered. If the verbose option is enabled, then all of the contents of the fi_info structure are displayed. For more information on the data contained in the fi_info structure, see fi_getinfo(3).

–version
    Display versioning information.

USAGE EXAMPLES

    $ fi_info -p verbs -t FI_EP_DGRAM

This will respond with all fabric interfaces that use endpoint type FI_EP_DGRAM with the verbs provider.

    fi_info -c 'FI_MSG|FI_READ|FI_RMA'

This will respond with all fabric interfaces that can support FI_MSG|FI_READ|FI_RMA capabilities.

OUTPUT

By default fi_info will output a summary of the fabric interfaces discovered:

    $ ./fi_info -p verbs -t FI_EP_DGRAM
    provider: verbs
        fabric: IB-0xfe80000000000000
        domain: mlx5_0-dgram
        version: 116.0
        type: FI_EP_DGRAM
        protocol: FI_PROTO_IB_UD
    $ ./fi_info -p tcp
    provider: tcp
        fabric: 192.168.7.0/24
        domain: eth0
        version: 116.0
        type: FI_EP_MSG
        protocol: FI_PROTO_SOCK_TCP

To see the full fi_info structure, specify the -v option.

    fi_info:
        caps: [ FI_MSG, FI_RMA, FI_TAGGED, FI_ATOMIC, FI_READ, FI_WRITE, FI_RECV, FI_SEND, FI_REMOTE_READ, FI_REMOTE_WRITE, FI_MULTI_RECV, FI_RMA_EVENT, FI_SOURCE, FI_DIRECTED_RECV ]
        mode: [  ]
        addr_format: FI_ADDR_IB_UD
        src_addrlen: 32
        dest_addrlen: 0
        src_addr: fi_addr_ib_ud://:::0/0/0/0
        dest_addr: (null)
        handle: (nil)
        fi_tx_attr:
            caps: [ FI_MSG, FI_RMA, FI_TAGGED, FI_ATOMIC, FI_READ, FI_WRITE, FI_SEND ]
            mode: [  ]
            op_flags: [  ]
            msg_order: [ FI_ORDER_RAR, FI_ORDER_RAW, FI_ORDER_RAS, FI_ORDER_WAW, FI_ORDER_WAS, FI_ORDER_SAW, FI_ORDER_SAS, FI_ORDER_RMA_RAR, FI_ORDER_RMA_RAW, FI_ORDER_RMA_WAW, FI_ORDER_ATOMIC_RAR, FI_ORDER_ATOMIC_RAW, FI_ORDER_ATOMIC_WAR, FI_ORDER_ATOMIC_WAW ]
            comp_order: [ FI_ORDER_NONE ]
            inject_size: 3840
            size: 1024
            iov_limit: 4
            rma_iov_limit: 4
            tclass: 0x0
        fi_rx_attr:
            caps: [ FI_MSG, FI_RMA, FI_TAGGED, FI_ATOMIC, FI_RECV, FI_REMOTE_READ, FI_REMOTE_WRITE, FI_MULTI_RECV, FI_RMA_EVENT, FI_SOURCE, FI_DIRECTED_RECV ]
            mode: [  ]
            op_flags: [  ]
            msg_order: [ FI_ORDER_RAR, FI_ORDER_RAW, FI_ORDER_RAS, FI_ORDER_WAW, FI_ORDER_WAS, FI_ORDER_SAW, FI_ORDER_SAS, FI_ORDER_RMA_RAR, FI_ORDER_RMA_RAW, FI_ORDER_RMA_WAW, FI_ORDER_ATOMIC_RAR, FI_ORDER_ATOMIC_RAW, FI_ORDER_ATOMIC_WAR, FI_ORDER_ATOMIC_WAW ]
            comp_order: [ FI_ORDER_NONE ]
            total_buffered_recv: 0
            size: 1024
            iov_limit: 4
        fi_ep_attr:
            type: FI_EP_RDM
            protocol: FI_PROTO_RXD
            protocol_version: 1
            max_msg_size: 18446744073709551615
            msg_prefix_size: 0
            max_order_raw_size: 18446744073709551615
            max_order_war_size: 0
            max_order_waw_size: 18446744073709551615
            mem_tag_format: 0xaaaaaaaaaaaaaaaa
            tx_ctx_cnt: 1
            rx_ctx_cnt: 1
            auth_key_size: 0
        fi_domain_attr:
            domain: 0x0
            name: mlx5_0-dgram
            threading: FI_THREAD_SAFE
            control_progress: FI_PROGRESS_MANUAL
            data_progress: FI_PROGRESS_MANUAL
            resource_mgmt: FI_RM_ENABLED
            av_type: FI_AV_UNSPEC
            mr_mode: [  ]
            mr_key_size: 8
            cq_data_size: 8
            cq_cnt: 128
            ep_cnt: 128
            tx_ctx_cnt: 1
            rx_ctx_cnt: 1
            max_ep_tx_ctx: 1
            max_ep_rx_ctx: 1
            max_ep_stx_ctx: 0
            max_ep_srx_ctx: 0
            cntr_cnt: 0
            mr_iov_limit: 1
            caps: [  ]
            mode: [  ]
            auth_key_size: 0
            max_err_data: 0
            mr_cnt: 0
            tclass: 0x0
        fi_fabric_attr:
            name: IB-0xfe80000000000000
            prov_name: verbs;ofi_rxd
            prov_version: 116.0
            api_version: 1.16
        nic:
            fi_device_attr:
                name: mlx5_0
                device_id: 0x101b
                device_version: 0
                vendor_id: 0x02c9
                driver: (null)
                firmware: 20.33.1048
            fi_bus_attr:
                bus_type: FI_BUS_UNKNOWN
            fi_link_attr:
                address: (null)
                mtu: 4096
                speed: 0
                state: FI_LINK_UP
                network_type: InfiniBand

To see libfabric related environment variables -e option.

    $ ./fi_info -e
    # FI_LOG_INTERVAL: Integer
    # Delay in ms between rate limited log messages (default 2000)
    # FI_LOG_LEVEL: String
    # Specify logging level: warn, trace, info, debug (default: warn)
    # FI_LOG_PROV: String
    # Specify specific provider to log (default: all)
    # FI_PROVIDER: String
    # Only use specified provider (default: all available)

To see libfabric related environment variables with substring use -g option.

    $ ./fi_info -g tcp
    # FI_OFI_RXM_DEF_TCP_WAIT_OBJ: String
    # ofi_rxm: See def_wait_obj for description.  If set, this overrides the def_wait_obj when running over the tcp provider.  See def_wait_obj for valid values. (default: UNSPEC, tcp provider will select).
    # FI_TCP_IFACE: String
    # tcp: Specify interface name
    # FI_TCP_PORT_LOW_RANGE: Integer
    # tcp: define port low range
    # FI_TCP_PORT_HIGH_RANGE: Integer
    # tcp: define port high range
    # FI_TCP_TX_SIZE: size_t
    # tcp: define default tx context size (default: 256)
    # FI_TCP_RX_SIZE: size_t
    # tcp: define default rx context size (default: 256)
    # FI_TCP_NODELAY: Boolean (0/1, on/off, true/false, yes/no)
    # tcp: overrides default TCP_NODELAY socket setting
    # FI_TCP_STAGING_SBUF_SIZE: Integer
    # tcp: size of buffer used to coalesce iovec's or send requests before posting to the kernel, set to 0 to disable
    # FI_TCP_PREFETCH_RBUF_SIZE: Integer
    # tcp: size of buffer used to prefetch received data from the kernel, set to 0 to disable
    # FI_TCP_ZEROCOPY_SIZE: size_t
    # tcp: lower threshold where zero copy transfers will be used, if supported by the platform, set to -1 to disable (default: 18446744073709551615)

SEE ALSO

fi_getinfo(3), fi_endpoint(3)

AUTHORS
OpenFabrics.