User Manual

InfiniBand Fabric UtilitiesRev 2.2-1.0.1
Mellanox Technologies
282
Additional Options
The table below lists the additional flags of the command
Table 56 - Additional ib_write_lat Flags and Options
Flag Description
--output=<units> Set verbosity output level: bandwidth , message_rate,
latency_typical
--pkey_index=<pkey index> PKey index to use for QP
.
9.5.7 ib_atomic_bw
Calculates the BW of RDMA Atomic transactions between a pair of machines. One acts as a
server and the other as a client. The client RDMA sends atomic operation to the server and calcu-
late the BW by sampling the CPU each time it receive a successful completion. The test supports
features such as Bidirectional, in which they both RDMA atomic to each other at the same time,
change of MTU size, tx size, number of iteration, message size and more. Using the "-a" flag pro-
vides results for all message sizes.
-I, --inline_size=<size> Max size of message to be sent in inline
-m, --mtu=<mtu> MTU size : 256 - 4096 (default port mtu)
-n, --iters=<iters> Number of exchanges (at least 5, default 1000)
-p, --port=<port> Listen on/connect to port <port> (default 18515)
-R, --rdma_cm Connect QPs with rdma_cm and run test on those QPs
-s, --size=<size> Size of message to exchange (default 2)
-S, --sl=<sl> SL (default 0)
-T, --tos=<tos value> Set <tos_value> to RDMA-CM QPs. available only with
-R flag. values 0-256 (default of
f)
-u, --qp-timeout=<timeout> QP timeout, timeout value is 4 usec * 2 ^(timeout),
default 14
-U, --report-unsorted (implies -H) print out unsorted results (default sorted)
-V, --version Display version number
-x, --gid-index=<index> Test uses GID with GID index (Default : IB - no gid .
ETH - 0)
-z, --com_rdma_cm Communicate with rdma_cm module to exchange data -
use regular QPs
Table 55 - ib_write_lat Flags and Options
Flag Description