blob: f2e79d22c4c43f67b7859f1a2f6ab5c3e2482598 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
===================
rtla-osnoise-hist
===================
------------------------------------------------------
Display a histogram of the osnoise tracer samples
------------------------------------------------------
:Manual section: 1
SYNOPSIS
========
**rtla osnoise hist** [*OPTIONS*]
DESCRIPTION
===========
.. include:: common_osnoise_description.rst
The **rtla osnoise hist** tool collects all **osnoise:sample_threshold**
occurrence in a histogram, displaying the results in a user-friendly way.
The tool also allows many configurations of the *osnoise* tracer and the
collection of the tracer output.
OPTIONS
=======
.. include:: common_osnoise_options.rst
.. include:: common_hist_options.rst
.. include:: common_options.rst
EXAMPLE
=======
In the example below, *osnoise* tracer threads are set to run with real-time
priority *FIFO:1*, on CPUs *0-11*, for *900ms* at each period (*1s* by
default). The reason for reducing the runtime is to avoid starving the
**rtla** tool. The tool is also set to run for *one minute*. The output
histogram is set to group outputs in buckets of *10us* and *25* entries::
[root@f34 ~/]# rtla osnoise hist -P F:1 -c 0-11 -r 900000 -d 1M -b 10 -E 25
# RTLA osnoise histogram
# Time unit is microseconds (us)
# Duration: 0 00:01:00
Index CPU-000 CPU-001 CPU-002 CPU-003 CPU-004 CPU-005 CPU-006 CPU-007 CPU-008 CPU-009 CPU-010 CPU-011
0 42982 46287 51779 53740 52024 44817 49898 36500 50408 50128 49523 52377
10 12224 8356 2912 878 2667 10155 4573 18894 4214 4836 5708 2413
20 8 5 12 2 13 24 20 41 29 53 39 39
30 1 1 0 0 10 3 6 19 15 31 30 38
40 0 0 0 0 0 4 2 7 2 3 8 11
50 0 0 0 0 0 0 0 0 0 1 1 2
over: 0 0 0 0 0 0 0 0 0 0 0 0
count: 55215 54649 54703 54620 54714 55003 54499 55461 54668 55052 55309 54880
min: 0 0 0 0 0 0 0 0 0 0 0 0
avg: 0 0 0 0 0 0 0 0 0 0 0 0
max: 30 30 20 20 30 40 40 40 40 50 50 50
SEE ALSO
========
**rtla-osnoise**\(1), **rtla-osnoise-top**\(1)
*osnoise* tracer documentation: <https://www.kernel.org/doc/html/latest/trace/osnoise-tracer.html>
AUTHOR
======
Written by Daniel Bristot de Oliveira <bristot@kernel.org>
.. include:: common_appendix.rst
|
