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latency - Online in the Cloud

Run latency in OnWorks free hosting provider over Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

This is the command latency that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

NAME


latency - Xenomai timer latency benchmark

SYNOPSIS


latency [ options ]

DESCRIPTION


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).

OPTIONS


latency accepts the following options:

-h
print histograms of min, avg, max latencies

-g <file>
dump histogram to <file> in a format easily readable with gnuplot. An example script
for gnuplot may be found in scripts/histo.gp in Xenomai sources distribution

-s
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 suppress headers

-T <test_duration_seconds>
default=0, so ^C to end

-q
suppresses 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

-f
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)

-b
break upon mode switch

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