107 lines
7.0 KiB
ReStructuredText
107 lines
7.0 KiB
ReStructuredText
|
=====================
|
||
|
|
rtla-timerlat-hist
|
||
|
|
=====================
|
||
|
|
------------------------------------------------
|
||
|
|
Histograms of the operating system timer latency
|
||
|
|
------------------------------------------------
|
||
|
|
|
||
|
|
:Manual section: 1
|
||
|
|
|
||
|
|
SYNOPSIS
|
||
|
|
========
|
||
|
|
**rtla timerlat hist** [*OPTIONS*] ...
|
||
|
|
|
||
|
|
DESCRIPTION
|
||
|
|
===========
|
||
|
|
|
||
|
|
.. include:: common_timerlat_description.rst
|
||
|
|
|
||
|
|
The **rtla timerlat hist** displays a histogram of each tracer event
|
||
|
|
occurrence. This tool uses the periodic information, and the
|
||
|
|
**osnoise:** tracepoints are enabled when using the **-T** option.
|
||
|
|
|
||
|
|
OPTIONS
|
||
|
|
=======
|
||
|
|
|
||
|
|
.. include:: common_timerlat_options.rst
|
||
|
|
|
||
|
|
.. include:: common_hist_options.rst
|
||
|
|
|
||
|
|
.. include:: common_options.rst
|
||
|
|
|
||
|
|
EXAMPLE
|
||
|
|
=======
|
||
|
|
In the example below, **rtla timerlat hist** is set to run for *10* minutes,
|
||
|
|
in the cpus *0-4*, *skipping zero* only lines. Moreover, **rtla timerlat
|
||
|
|
hist** will change the priority of the *timerlat* threads to run under
|
||
|
|
*SCHED_DEADLINE* priority, with a *10us* runtime every *1ms* period. The
|
||
|
|
*1ms* period is also passed to the *timerlat* tracer::
|
||
|
|
|
||
|
|
[root@alien ~]# timerlat hist -d 10m -c 0-4 -P d:100us:1ms -p 1ms
|
||
|
|
# RTLA timerlat histogram
|
||
|
|
# Time unit is microseconds (us)
|
||
|
|
# Duration: 0 00:10:00
|
||
|
|
Index IRQ-000 Thr-000 IRQ-001 Thr-001 IRQ-002 Thr-002 IRQ-003 Thr-003 IRQ-004 Thr-004
|
||
|
|
0 276489 0 206089 0 466018 0 481102 0 205546 0
|
||
|
|
1 318327 35487 388149 30024 94531 48382 83082 71078 388026 55730
|
||
|
|
2 3282 122584 4019 126527 28231 109012 23311 89309 4568 98739
|
||
|
|
3 940 11815 837 9863 6209 16227 6895 17196 910 9780
|
||
|
|
4 444 17287 424 11574 2097 38443 2169 36736 462 13476
|
||
|
|
5 206 43291 255 25581 1223 101908 1304 101137 236 28913
|
||
|
|
6 132 101501 96 64584 635 213774 757 215471 99 73453
|
||
|
|
7 74 169347 65 124758 350 57466 441 53639 69 148573
|
||
|
|
8 53 85183 31 156751 229 9052 306 9026 39 139907
|
||
|
|
9 22 10387 12 42762 161 2554 225 2689 19 26192
|
||
|
|
10 13 1898 8 5770 114 1247 128 1405 13 3772
|
||
|
|
11 9 560 9 924 71 686 76 765 8 713
|
||
|
|
12 4 256 2 360 50 411 64 474 3 278
|
||
|
|
13 2 167 2 172 43 256 53 350 4 180
|
||
|
|
14 1 88 1 116 15 198 42 223 0 115
|
||
|
|
15 2 63 3 94 11 139 20 150 0 58
|
||
|
|
16 2 37 0 56 5 78 10 102 0 39
|
||
|
|
17 0 18 0 28 4 57 8 80 0 15
|
||
|
|
18 0 8 0 17 2 50 6 56 0 12
|
||
|
|
19 0 9 0 5 0 19 0 48 0 18
|
||
|
|
20 0 4 0 8 0 11 2 27 0 4
|
||
|
|
21 0 2 0 3 1 9 1 18 0 6
|
||
|
|
22 0 1 0 3 1 7 0 3 0 5
|
||
|
|
23 0 2 0 4 0 2 0 7 0 2
|
||
|
|
24 0 2 0 2 1 3 0 3 0 5
|
||
|
|
25 0 0 0 1 0 1 0 1 0 3
|
||
|
|
26 0 1 0 0 0 2 0 2 0 0
|
||
|
|
27 0 0 0 3 0 1 0 0 0 1
|
||
|
|
28 0 0 0 3 0 0 0 1 0 0
|
||
|
|
29 0 0 0 2 0 2 0 1 0 3
|
||
|
|
30 0 1 0 0 0 0 0 0 0 0
|
||
|
|
31 0 1 0 0 0 0 0 2 0 2
|
||
|
|
32 0 0 0 1 0 2 0 0 0 0
|
||
|
|
33 0 0 0 2 0 0 0 0 0 1
|
||
|
|
34 0 0 0 0 0 0 0 0 0 2
|
||
|
|
35 0 1 0 1 0 0 0 0 0 1
|
||
|
|
36 0 1 0 0 0 1 0 1 0 0
|
||
|
|
37 0 0 0 1 0 0 0 0 0 0
|
||
|
|
40 0 0 0 0 0 1 0 1 0 0
|
||
|
|
41 0 0 0 0 0 0 0 0 0 1
|
||
|
|
42 0 0 0 0 0 0 0 0 0 1
|
||
|
|
44 0 0 0 0 0 1 0 0 0 0
|
||
|
|
46 0 0 0 0 0 0 0 1 0 0
|
||
|
|
47 0 0 0 0 0 0 0 0 0 1
|
||
|
|
50 0 0 0 0 0 0 0 0 0 1
|
||
|
|
54 0 0 0 1 0 0 0 0 0 0
|
||
|
|
58 0 0 0 1 0 0 0 0 0 0
|
||
|
|
over: 0 0 0 0 0 0 0 0 0 0
|
||
|
|
count: 600002 600002 600002 600002 600002 600002 600002 600002 600002 600002
|
||
|
|
min: 0 1 0 1 0 1 0 1 0 1
|
||
|
|
avg: 0 5 0 5 0 4 0 4 0 5
|
||
|
|
max: 16 36 15 58 24 44 21 46 13 50
|
||
|
|
|
||
|
|
SEE ALSO
|
||
|
|
========
|
||
|
|
**rtla-timerlat**\(1), **rtla-timerlat-top**\(1)
|
||
|
|
|
||
|
|
*timerlat* tracer documentation: <https://www.kernel.org/doc/html/latest/trace/timerlat-tracer.html>
|
||
|
|
|
||
|
|
AUTHOR
|
||
|
|
======
|
||
|
|
Written by Daniel Bristot de Oliveira <bristot@kernel.org>
|