Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

cyclictest(1) [debian man page]

CYCLICTEST(1)							      Xenomai							     CYCLICTEST(1)

cyclictest - Xenomai high resolution timer test SYNOPSIS
cyclictest [options] DESCRIPTION
cyclictest is part of the Xenomai test suite and tests the POSIX skin of Xenomai with a cyclic timer test. For this program to work, you need to run a suitable Xenomai enabled kernel with the respective module (xeno_posix). OPTIONS
cyclictest accepts the following options: -b USEC, --breaktrace=USEC send break trace command when latency > USEC -c CLOCK, --clock=CLOCK select clock: 0 = CLOCK_MONOTONIC (default) 1 = CLOCK_REALTIME -d DIST, --distance=DIST distance of thread intervals in us default=500 -i INTV, --interval=INTV base interval of thread in us default=1000 -l LOOPS, --loops=LOOPS number of loops: default=0 (endless) -n, --nanosleep use clock_nanosleep -p PRIO, --prio=PRIO priority of highest prio thread -q, --quiet print only a summary on exit -r, --relative use relative timer instead of absolute -t NUM, --threads=NUM number of threads: default=1 -v, --verbose output values on stdout for statistics format: n:c:v n=tasknum c=count v=value in us AUTHOR
cyclictest was written by Thomas Gleixner <>. This man page was written by Roland Stigge <>. 2.6.0 2008-04-01 CYCLICTEST(1)

Check Out this Related Man Page

ptsematest(8)															     ptsematest(8)

ptsematest - Start two threads and measure the latency of interprocess communication with POSIX mutex. SYNTAX
ptsematest [-a|-a PROC] [-b USEC] [-d DIST] [-i INTV] [-l loops] [-p PRIO] [-t|-t NUM] DESCRIPTION
The program ptsematest starts two threads that are synchronized via pthread_mutex_unlock()/pthread_mutex_lock() and measures the latency between releasing and getting the lock. OPTIONS
-a, --affinity[=PROC] Run on procesor number PROC. If PROC is not specified, run on current processor. -b, --breaktrace=USEC Send break trace command when latency > USEC. This is a debugging option to control the latency tracer in the realtime preemption patch. It is useful to track down unexpected large latencies of a system. -d, --distance=DIST Set the distance of thread intervals in microseconds (default is 500 us). When cylictest is called with the -t option and more than one thread is created, then this distance value is added to the interval of the threads: Interval(thread N) = Interval(thread N-1) + DIST -i, --interval=INTV Set the base interval of the thread(s) in microseconds (default is 1000 us). This sets the interval of the first thread. See also -d. -l, --loops=LOOPS Set the number of loops. The default is 0 (endless). This option is useful for automated tests with a given number of test cycles. ptsematest is stopped once the number of timer intervals has been reached. -p, --prio=PRIO Set the priority of the process. -t, --threads[=NUM] Set the number of test threads (default is 1, if this option is not given). If NUM is specified, create NUM test threads. If NUM is not specifed, NUM is set to the number of available CPUs. EXAMPLES
The following example was running on a 4-way processor: # ptsematest -a -t -p99 -i100 -d25 -l1000000 #0: ID8672, P99, CPU0, I100; #1: ID8673, P99, CPU0, Cycles 1000000 #2: ID8674, P98, CPU1, I125; #3: ID8675, P98, CPU1, Cycles 811035 #4: ID8676, P97, CPU2, I150; #5: ID8677, P97, CPU2, Cycles 668130 #6: ID8678, P96, CPU3, I175; #7: ID8679, P96, CPU3, Cycles 589423 #1 -> #0, Min 1, Cur 1, Avg 2, Max 11 #3 -> #2, Min 1, Cur 2, Avg 2, Max 13 #5 -> #4, Min 1, Cur 4, Avg 3, Max 12 #7 -> #6, Min 1, Cur 4, Avg 2, Max 12 AUTHORS
Carsten Emde <> SEE ALSO
pthread_mutex_lock(3p), pthread_mutex_unlock(3p) 0.1 ptsematest(8)
Man Page

Featured Tech Videos