User Manual

InfiniBand FabricRev 4.3
Mellanox Technologies
79
7.4.3.1 ib_send_bw Synopsys
7.4.3.2 ib_send_bw Options
The table below lists the various flags of the command.
7.4.4 ib_send_lat
ib_send_lat calculats the latency of sending a packet in message_sizeB between a pair of
machines. One acts as a server and the other as a client. They perform a ping pong benchmark on
which you send packet only if you receive one. Each of the sides samples the CPU each time they
receive a packet in order to calculate the latency.
ib_send_bw [-i(b_port) ib_port] [-c(onnection_type) RC\UC\UD] [-m(tu) mtu_size] [-
s(ize) message_size] [-t(x-depth) tx_size] [-n iteration_num] [-p(ort)
PDT_port] [-b(idirectional)] [-a(ll)] [-V(ersion)]
Table 20 - ib_send_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)
-c, --connection=<RC/UC> Connection type RC/UC/UD (default RC)
-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)
-b, --bidirectional Measures bidirectional bandwidth (default unidirectional)
-V, --version Displays version number
-g, --grh Use GRH with packets (mandatory for RoCE)