Provided by: lmbench_3.0-a9+debian.1-6_amd64
lat_tcp - measure interprocess communication latency via TCP/IP
lat_tcp -s lat_tcp [ -m <message size> ] [ -P <parallelism> ] [ -W <warmups> ] [ -N <repetitions> ] hostname lat_tcp -S hostname
lat_tcp is a client/server program that measures interprocess communication latencies. The benchmark passes a message back and forth between the two processes (this sort of benchmark is frequently referred to as a ``hot potato'' benchmark). No other work is done in the processes. lat_tcp has three forms of usage: as a server (-s), as a client (lat_tcp localhost), and as a shutdown (lat_tcp -S localhost).
The reported time is in microseconds per round trip and includes the total time, i.e., the context switching overhead is includeded. Output format is like so TCP latency using localhost: 700 microseconds
Funding for the development of this tool was provided by Sun Microsystems Computer Corporation.
lmbench(8), lat_fcntl(8), lat_fifo(8), lat_tcp(8), lat_udp(8), lat_unix(8).
Carl Staelin and Larry McVoy Comments, suggestions, and bug reports are always welcome. (c)1994 Larry McVoy $Date$ LAT_TCP(8)