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Langue: en

Version: 2008-04-19 (debian - 07/07/09)

Section: 1 (Commandes utilisateur)


latency - Xenomai timer latency benchmark


latency [options]


latency is part of the Xenomai test suite. It is a timer latency benchmark program. The system must run a suitable Xenomai enabled kernel with the respective module (xeno_timerbench).


latency accepts the following options:
print histograms of min, avg, max latencies
print statistics of min, avg, max latencies
-H <histogram-size>
default = 200, increase if your last bucket is full
-B <bucket-size>
default = 1000ns, decrease for more resolution
-p <period_us>
sampling period
-l <data-lines per header>
default=21, 0 to supress headers
-T <test_duration_seconds>
default=0, so ^C to end
supresses RTD, RTH lines if -T is used
-D <testing_device_no>
number of testing device, default=0
-t <test_mode>
0=user task (default), 1=kernel task, 2=timer IRQ
freeze trace for each new max latency
-c <cpu>
pin measuring task down to given CPU
-P <priority>
task priority (test mode 0 and 1 only)


latency was written by Philippe Gerum <>. This man page was written by Roland Stigge <>.
Il y a trois types de mathématiciens, ceux qui savent compter et ceux
qui ne savent pas.