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- .\" $Id$
- .TH LAT_SELECT 8 "$Date$" "(c)1994 Larry McVoy" "LMBENCH"
- .SH NAME
- lat_select - time simple entry into the operating system
- .SH SYNOPSIS
- .B lat_select
- .I "tcp|file"
- [
- .I n
- ]
- .SH DESCRIPTION
- .B lat_select
- times how long it takes to
- .I select
- on
- .B n
- file descriptors.
- .B lat_select
- can either
- .I select
- on local files, or TCP network connections.
- .SH OUTPUT
- Output format depends on whether
- .B lat_select
- is testing local files or network connections.
- In either case it reports the number of descriptors
- and the average latency in microseconds.
- Example output for
- .B lat_select
- on files is:
- .sp
- .ft CB
- Select on 200 fd's: 67 microseconds
- .ft
- .PP
- or for network connections:
- .ft CB
- Select on 200 tcp fd's: 117 microseconds
- .ft
- .SH ACKNOWLEDGEMENT
- Funding for the development of
- this tool was provided by Sun Microsystems Computer Corporation.
- .SH "SEE ALSO"
- lmbench(8), select(2), dup(2), open(2).
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