---
name: "ib_rdma_bw"
section: "1"
platform: "linux"
package: "perftest"
version: "1.2-OFED-1.4.2-2"
release: "Debian 7 (Wheezy)"
platforms: ["linux"]
url: "https://new.carta.tech/ib_rdma_bw"
---

# ib\_rdma\_bw(1)

RDMA bandwidth test

## NAME

ib\_rdma\_bw - RDMA bandwidth test

## SYNOPSIS

**ib\_rdma\_bw \[** *options* **\] \[** *server IP address* **\]**

## DESCRIPTION

This program tests the latency  of RMDA write transactions.

## OPTIONS

- **-p, --port=\<port\>**

  listen on/connect to port \<port\> (default: 18515)

- **-d, --ib-dev=\<dev\>**

  use IB device \<dev\> (default: first device found)

- **-i, --ib-port=\<port\>**

  use port \<port\> of IB device (default: 1)

- **-s, --size=\<size\>**

  size of message to exchange (default: 65536)

- **-t, --tx-depth=\<dep\>**

  size of tx queue (default 100)

- **-n, --iters=\<iters\>**

  number of exchanges (at least 2, default: 1000)

- **-b, --bidrectional**

  measure bidirectional bandwidth (default unidirectional)

- **-c, --cma**

  use RDMA CM

- **-V, --version**

  display version number

## AUTHOR

- Guy Coates \< gmpc@sanger.ac.uk \>