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lat_unix - measure interprocess communication latency via UNIX sockets
lat_unix [ -m <message size> ] [ -P <parallelism> ] [ -W <warmups> ] [ -N
<repetitions> ]
lat_unix 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.
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
AF_UNIX sock stream latency: 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)
.
Carl Staelin and Larry McVoy
Comments, suggestions, and
bug reports are always welcome.
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