Print UCX info

This tool prints various information about UCX library:

• Version and build configuration
• Configuration settings and help for every variable.
• Sizes of various data structures
• Transport information: devices and capabilities. The tool resides in src/tools/info.

Full options list:

$ ucx_info -h
Usage: ucx_info [options]
Options are:
  -v         Version
  -d         Devices
  -c         Configuration
  -a         Show also hidden configuration
  -b         Build configuration
  -y         Type information
  -f         Fully decorated output
  -t <name>  Print information for a specific transport

Sample output:

# Transport: rc
#
#   mlx5_0:1
#      speed:         6502.32 MB/sec
#      capabilities:
#            put_short: <= 92
#            put_bcopy: <= 8192
#            put_zcopy: <= 1073741824
#            get_bcopy: <= 8192
#            get_zcopy: <= 1073741824
#             am_short: <= 91
#             am_bcopy: <= 8191
#             am_zcopy: <= 8191
#            am header: <= 127
#           atomic_add: 32, 64 bit
#          atomic_fadd: 32, 64 bit
#          atomic_swap: 32, 64 bit
#         atomic_cswap: 32, 64 bit
#       error handling: none
#
#   mlx4_0:1
#      speed:         6502.32 MB/sec
#      capabilities:
#            put_short: <= 88
#            put_bcopy: <= 8192
#            put_zcopy: <= 1073741824
#            get_bcopy: <= 8192
#            get_zcopy: <= 1073741824
#             am_short: <= 87
#             am_bcopy: <= 8191
#             am_zcopy: <= 8191
#            am header: <= 127
#           atomic_add: 64 bit
#          atomic_fadd: 64 bit
#          atomic_swap: 64 bit
#         atomic_cswap: 64 bit
#       error handling: none
#
#   mlx4_0:2
#      speed:         6502.32 MB/sec
#      capabilities:
#            put_short: <= 88
#            put_bcopy: <= 8192
#            put_zcopy: <= 1073741824
#            get_bcopy: <= 8192
#            get_zcopy: <= 1073741824
#             am_short: <= 87
#             am_bcopy: <= 8191
#             am_zcopy: <= 8191
#            am header: <= 127
#           atomic_add: 64 bit
#          atomic_fadd: 64 bit
#          atomic_swap: 64 bit
#         atomic_cswap: 64 bit
#       error handling: none
#