1 =====================
2 rtla-timerlat-hist
3 =====================
4 ----------------------------------------------
5 Histograms of the operating system timer laten
6 ----------------------------------------------
7
8 :Manual section: 1
9
10 SYNOPSIS
11 ========
12 **rtla timerlat hist** [*OPTIONS*] ...
13
14 DESCRIPTION
15 ===========
16
17 .. include:: common_timerlat_description.rst
18
19 The **rtla timerlat hist** displays a histogra
20 occurrence. This tool uses the periodic inform
21 **osnoise:** tracepoints are enabled when usin
22
23 OPTIONS
24 =======
25
26 .. include:: common_timerlat_options.rst
27
28 .. include:: common_hist_options.rst
29
30 .. include:: common_options.rst
31
32 .. include:: common_timerlat_aa.rst
33
34 EXAMPLE
35 =======
36 In the example below, **rtla timerlat hist** i
37 in the cpus *0-4*, *skipping zero* only lines.
38 hist** will change the priority of the *timerl
39 *SCHED_DEADLINE* priority, with a *100us* runt
40 *1ms* period is also passed to the *timerlat*
41 to reduce overhead ::
42
43 [root@alien ~]# timerlat hist -d 10m -c 0-4
44 # RTLA timerlat histogram
45 # Time unit is microseconds (us)
46 # Duration: 0 00:10:00
47 Index IRQ-000 Thr-000 IRQ-001 Thr-00
48 0 276489 0 206089
49 1 318327 35487 388149 3002
50 2 3282 122584 4019 12652
51 3 940 11815 837 986
52 4 444 17287 424 1157
53 5 206 43291 255 2558
54 6 132 101501 96 6458
55 7 74 169347 65 12475
56 8 53 85183 31 15675
57 9 22 10387 12 4276
58 10 13 1898 8 577
59 11 9 560 9 92
60 12 4 256 2 36
61 13 2 167 2 17
62 14 1 88 1 11
63 15 2 63 3 9
64 16 2 37 0 5
65 17 0 18 0 2
66 18 0 8 0 1
67 19 0 9 0
68 20 0 4 0
69 21 0 2 0
70 22 0 1 0
71 23 0 2 0
72 24 0 2 0
73 25 0 0 0
74 26 0 1 0
75 27 0 0 0
76 28 0 0 0
77 29 0 0 0
78 30 0 1 0
79 31 0 1 0
80 32 0 0 0
81 33 0 0 0
82 34 0 0 0
83 35 0 1 0
84 36 0 1 0
85 37 0 0 0
86 40 0 0 0
87 41 0 0 0
88 42 0 0 0
89 44 0 0 0
90 46 0 0 0
91 47 0 0 0
92 50 0 0 0
93 54 0 0 0
94 58 0 0 0
95 over: 0 0 0
96 count: 600002 600002 600002 60000
97 min: 0 1 0
98 avg: 0 5 0
99 max: 16 36 15 5
100
101 SEE ALSO
102 ========
103 **rtla-timerlat**\(1), **rtla-timerlat-top**\(
104
105 *timerlat* tracer documentation: <https://www.
106
107 AUTHOR
108 ======
109 Written by Daniel Bristot de Oliveira <bristot@
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