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- .\" $Id$
- .TH LAT_FCNTL 8 "$Date$" "(c)1994 Larry McVoy" "LMBENCH"
- .SH NAME
- lat_fcntl \- measure fctl() locking latencies
- .SH SYNOPSIS
- .B lat_fcntl
- .SH DESCRIPTION
- .B lat_fcntl
- uses two processes and alternately locks and unlocks files so that
- only one of the processes is running at a time, similar to
- ``hot potato'' message passing benchmarks.
- No other work is done in the processes.
- .SH OUTPUT
- The reported time is in microseconds per round trip and includes the total
- time, i.e., the context switching overhead is included.
- Output format is like so
- .sp
- .ft CB
- AF_UNIX sock stream latency: 491 microseconds
- .ft
- .SH ACKNOWLEDGEMENT
- Funding for the development of
- this tool was provided by Sun Microsystems Computer Corporation.
- .SH "SEE ALSO"
- lmbench(8), fcntl(2).
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