signaltest - signal roundtrip test software
signaltest [ -a|--affinity NUM] [ -b|--backtrace USEC ]
[-D|--duration TIME] [-h|--help] [--json FILENAME] [-l|--loops LOOPS ]
[-p|--prio PRIO] [-q|--quiet] [-S|--smp] [-t|--threads NUM] [-m|--mlockall ]
[-v|--verbose ]
These programs follow the usual GNU command line syntax, with long
options starting with two dashes ('--').
- -a,
--affinity[=PROC-SET]
- Run threads on the set of processors given by PROC-SET. If PROC-SET is not
specified, all processors will be used. Threads will be assigned to
processors in the set in numeric order, in a round-robin fashion.
The set of processors can be specified as A,B,C, or A-C, or A-B,D-F, and so
on*. The ! character can be used to negate a set. For example, !B-D means
to use all available CPUs except B through D. The cpu numbers are the same
as shown in the processor field in /proc/cpuinfo. See numa(3) for
more information on specifying CPU sets. * Support for CPU sets requires
libnuma version >= 2. For libnuma v1, PROC-SET, if specified, must be a
single CPU number.
- -b,
--breaktrace=USEC
- Send break trace command when latency > USEC
- -D,
--duration=TIME
- Specify a length for the test run.
Append 'm', 'h', or 'd' to specify minutes, hours or days.
- --help
-
display usage information
- --json=FILENAME
- Write final results into FILENAME, JSON formatted.
- -l, --loops=LOOPS
- Number of loops: default=0 (endless)
- -p,
--priority=PRIO
- Priority of highest priority thread
- -q, --quiet
- print a summary only on exit
- -S, --smp
- Set options for standard testing on SMP systems. Equivalent to using the
options: "-t -a" as well keeping any specified priority equal
across all threads
- -t, --threads=NUM
- number of threads: default=2
- -m, --mlockall
- lock current and future memory allocations
- -v, --verbose
- output values on stdout for statistics
format: n:c:v n=tasknum c=count v=value in us
signaltest was written by Thomas Gleixner
<tglx@linuxtronix.de>.
This manual page was originally written by
John Kacur <jkacur@redhat.com>
Copying and distribution of this file, with or without
modification, are permitted in any medium without royalty provided the
copyright notice and this notice are preserved. This file is offered as-is,
without any warranty.