// ** The above line should force tbl to be a preprocessor **
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// Man page for latency
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//
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// Copyright (C) 2008 Roland Stigge <stigge@antcom.de>
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//
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// You may distribute under the terms of the GNU General Public
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// License as specified in the file COPYING that comes with the
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// Xenomai distribution.
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//
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//
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LATENCY(1)
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==========
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:doctype: manpage
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:revdate: 2008/04/19
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:man source: Xenomai
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:man version: {xenover}
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:man manual: Xenomai Manual
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NAME
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-----
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latency - Xenomai timer latency benchmark
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SYNOPSIS
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---------
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// The general command line
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*latency* [ options ]
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DESCRIPTION
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------------
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*latency* is part of the Xenomai test suite. It is a timer latency
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benchmark program. The system must run a suitable Xenomai enabled kernel with
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the respective module (xeno_timerbench).
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OPTIONS
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--------
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*latency* accepts the following options:
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*-h*::
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print histograms of min, avg, max latencies
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*-g <file>*::
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dump histogram to <file> in a format easily readable with gnuplot. An
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example script for gnuplot may be found in scripts/histo.gp in Xenomai
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sources distribution
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*-s*::
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print statistics of min, avg, max latencies
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*-H <histogram-size>*::
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default = 200, increase if your last bucket is full
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*-B <bucket-size>*::
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default = 1000ns, decrease for more resolution
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*-p <period_us>*::
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sampling period
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*-l <data-lines per header>*::
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default=21, 0 to suppress headers
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*-T <test_duration_seconds>*::
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default=0, so ^C to end
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*-q*::
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suppresses RTD, RTH lines if -T is used
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*-t <test_mode>*::
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0=user task (default), 1=kernel task, 2=timer IRQ
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*-f*::
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freeze trace for each new max latency
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*-c <cpu>*::
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pin measuring task down to given CPU
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*-P <priority>*::
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task priority (test mode 0 and 1 only)
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*-b*::
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break upon mode switch
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AUTHOR
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-------
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*latency* was written by Philippe Gerum. This man page
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was written by Roland Stigge.
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