Provided by: libfabric-bin_1.17.0-3build2_amd64 
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 end‐
point 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 in‐
formation 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.
Libfabric Programmer’s Manual 2022-12-11 fi_info(1)