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2026-05-25 - 09:23

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #7

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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Click here to display the system's profile data or here to proceed to next system.
Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

Note that this system runs a non-RT kernel.
Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackbslot7s.osadl.org (updated Mon May 25, 2026 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
262822490420,4873sleep014889-21kworker/0:121:27:050
188312464019,4608sleep214426-21kworker/2:122:45:042
188312464019,4608sleep214426-21kworker/2:122:45:042
243272295943,2853sleep013151-1kworker/0:2H23:04:000
1182251720,480sleep11200-21/usr/sbin/munin23:34:021
16920235418,320sleep116997-21/usr/sbin/munin22:39:181
12892234413,251sleep013043-21unixbench_multi20:44:200
10308233016,298sleep210321-21/usr/sbin/munin22:19:162
10308233016,298sleep210321-21/usr/sbin/munin22:19:162
2401823166,275sleep024064-21ntpq21:19:130
8832225655,141sleep08885-21latency_hist20:33:500
15886225410,143sleep00-21swapper/000:19:190
28991224845,135sleep029005-21acpi23:18:580
5436223634,189sleep00-21swapper/022:04:120
5436223634,189sleep00-21swapper/022:04:120
11375223315,152sleep011523-21unixbench_singl20:39:240
16719221825,179sleep016766-21ntpq22:39:130
16976220833,132sleep017001-21netstat19:14:120
22600220759,125sleep022683-21latency_hist19:33:500
19691220011,174sleep319778-21cat22:49:133
1671219313,163sleep21708-21proc_pri23:34:192
14330218314,150sleep214460-21grep00:14:212
917218263,82sleep0934-21idleruntime-cro23:33:480
2078521760,6sleep20-21swapper/200:34:232
2695821655,12sleep00-21swapper/023:11:270
14829216215,68sleep014860-21fschecks_count22:34:080
22705216117,20sleep00-21swapper/021:14:210
25069215693,40sleep00-21swapper/019:39:200
7970215030,96sleep37996-21munin-plugin-st22:13:483
7970215030,96sleep37996-21munin-plugin-st22:13:483
11696214914,18sleep00-21swapper/000:07:040
3104721488,104sleep031089-21ntpq19:59:140
8690214611,115sleep08734-21systemctl23:58:480
2643221467,124sleep026497-21awk19:44:160
14411214528,77sleep00-21swapper/019:08:510
1912121438,89sleep00-21swapper/021:04:230
21735214268,24sleep021738-21cron21:13:480
20758214047,53sleep020904-21sed22:53:500
23807213915,111sleep0307-21in:imuxsock23:03:480
17870213916,61sleep00-21swapper/022:44:050
17870213916,61sleep00-21swapper/022:44:050
2825221348,82sleep00-21swapper/021:34:030
2095021337,116sleep0363-21snmpd19:28:090
2878121329,108sleep028843-21sed23:18:500
14110213210,80sleep00-21swapper/020:49:130
11885213224,88sleep111933-21grep00:08:501
6341213115,60sleep00-21swapper/020:24:130
6341213115,60sleep00-21swapper/020:24:130
357521309,107sleep03585-21find21:58:590
357521309,107sleep03585-21find21:58:590
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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