Manual Reference Pages - LAT_TCP (8)
lat_tcp - measure interprocess communication latency via TCP/IP
-m <message size> ]
-P <parallelism> ]
-W <warmups> ]
-N <repetitions> ]
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 ||LAT_TCP (8) ||$Date$ |
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