Flowgrind is a tool similar to iperf, netperf to measure throughput and other
metrics for TCP and other protocols. It features some unique characteristics
which are of use when exploring the idiosyncrasies of wireless mesh networks.

Spew is used to measure I/O performance of character devices, block devices,
and regular files. It can also be used to generate high I/O loads to stress
systems while verifying data integrity.

Spew is easy to use and is flexible. No configuration files or complicated
client/server configurations are needed. Spew also generates its own data
patterns that are designed to make it easy to find and debug data integrity
problems.