User Manual

InfiniBand FabricRev 4.3
Mellanox Technologies
83
7.4.7.1 ibv_read_bw Synopsys
7.4.7.2 ibv_read_bw Options
The table below lists the various flags of the command.
ibv_read_bw [-i(b_port) ib_port] [-d ib device] [-o(uts) outstanding reads] [-m(tu)
mtu_size] [-s(ize) message_size] [-t(x-depth) tx_size] [-n iteration_num] [-p(ort)
PDT_port] [-u qp timeout] [-S(l) sl type] [-x gid index] [-e(vents) use
events] [-F CPU freq fail] [-b(idirectional)] [-a(ll)] [-V(ersion)]
Table 24 - ibv_read_bw Flags and Options
Flag Description
-p, --port=<port> Listens on/connect to port <port> (default 18515)
-d, --ib-dev=<dev> Uses IB device <device guid> (default first device found)
-i, --ib-port=<port> Uses port <port> of IB device (default 1)
-m, --mtu=<mtu> The mtu size (default 1024)
-o, --outs=<num> The number of outstanding read/atom(default for hermon 16 (others
4)
-s, --size=<size> The size of message to exchange (default 65536)
-a, --all Runs sizes from 2 till 2^23
-t, --tx-depth=<dep> The size of tx queue (default 100)
-n, --iters=<iters> The number of exchanges (at least 2, default 1000)
-u, --qp-timeout=<timeout> QP timeout. The timeout value is 4 usec * 2 ^(timeout), default 14
-S, --sl=<sl> The service level (default 0)
-x, --gid-index=<index> Test uses GID with GID index taken from command line (for
RDMAoE index should be 0)
-b, --bidirectional Measures bidirectional bandwidth (default unidirectional)
-V, --version Displays version number
-g, --post=<num of posts> The number of posts for each qp in the chain (default tx_depth)
-e, --events Inactive during CQ events (default poll)
-F, --CPU-freq The CPU frequency test. It is active even if the cpufreq_ondemand
module is loaded
-R, --rdma_cm Connect QPs with rdma_cm and run test on those QPs
-z, --com_rdma_cm Communicate with rdma_cm module to exchange data - use regular
QPs
-c, --connection=<RC/UC/UD> Connection type RC/UC/UD (default RC)
-I, --inline_size=<size> Max size of message to be sent in inline (default 0)