1SIGNALTEST(8) System Manager's Manual SIGNALTEST(8)
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6 signaltest - signal roundtrip test software
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9 signaltest [ -a|--affinity NUM] [ -b|--backtrace USEC ] [-D|--duration
10 TIME] [-h|--help] [--json FILENAME] [-l|--loops LOOPS ] [-p|--prio
11 PRIO] [-q|--quiet] [-S|--smp] [-t|--threads NUM] [-m|--mlockall ]
12 [-v|--verbose ]
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15 These programs follow the usual GNU command line syntax, with long op‐
16 tions starting with two dashes ('--').
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18 -a, --affinity[=PROC-SET]
19 Run threads on the set of processors given by PROC-SET. If
20 PROC-SET is not specified, all processors will be used. Threads
21 will be assigned to processors in the set in numeric order, in a
22 round-robin fashion.
23 The set of processors can be specified as A,B,C, or A-C, or A-
24 B,D-F, and so on*. The ! character can be used to negate a set.
25 For example, !B-D means to use all available CPUs except B
26 through D. The cpu numbers are the same as shown in the proces‐
27 sor field in /proc/cpuinfo. See numa(3) for more information on
28 specifying CPU sets. * Support for CPU sets requires libnuma
29 version >= 2. For libnuma v1, PROC-SET, if specified, must be a
30 single CPU number.
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32 -b, --breaktrace=USEC
33 Send break trace command when latency > USEC
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35 -D, --duration=TIME
36 Specify a length for the test run.
37 Append 'm', 'h', or 'd' to specify minutes, hours or days.
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39 --help
40 display usage information
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42 --json=FILENAME
43 Write final results into FILENAME, JSON formatted.
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45 -l, --loops=LOOPS
46 Number of loops: default=0 (endless)
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48 -p, --priority=PRIO
49 Priority of highest priority thread
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51 -q, --quiet
52 print a summary only on exit
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54 -S, --smp
55 Set options for standard testing on SMP systems. Equivalent to
56 using the options: "-t -a" as well keeping any specified prior‐
57 ity equal across all threads
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59 -t, --threads=NUM
60 number of threads: default=2
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62 -m, --mlockall
63 lock current and future memory allocations
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65 -v, --verbose
66 output values on stdout for statistics
67 format: n:c:v n=tasknum c=count v=value in us
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70 signaltest was written by Thomas Gleixner <tglx@linuxtronix.de>.
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72 This manual page was originally written by
73 John Kacur <jkacur@redhat.com>
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75 Copying and distribution of this file, with or without modification,
76 are permitted in any medium without royalty provided the copyright no‐
77 tice and this notice are preserved. This file is offered as-is, with‐
78 out any warranty.
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82 November 15, 2020 SIGNALTEST(8)