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2026-03-22 - 00:21

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #8

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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  Congatec
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.

Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
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 100 highest latencies:
System rackeslot8s.osadl.org (updated Sat Mar 21, 2026 12:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4677779920350,2031cyclictest9221902sleep312:24:553
4677779917711,1765cyclictest623009-21sleep09:10:013
467777992220,219cyclictest814806-21turbostat11:19:553
7820702211,8sleep0782111-21/usr/sbin/munin10:50:250
7820702211,8sleep0782111-21/usr/sbin/munin10:50:240
467777992017,1cyclictest0-21swapper/309:50:013
467777992017,1cyclictest0-21swapper/309:35:193
46777799186,9cyclictest467947-21taskset07:10:013
46777799177,7cyclictest753421-21turbostat10:34:593
46777799171,12cyclictest653688-21taskset09:30:003
46777799164,8cyclictest8990272sleep312:09:363
467777991613,1cyclictest0-21swapper/311:38:553
467777991613,1cyclictest0-21swapper/310:20:183
467777991613,1cyclictest0-21swapper/310:17:113
467777991612,1cyclictest0-21swapper/308:05:153
46777799161,12cyclictest508127-21taskset07:39:563
46777799161,11cyclictest913874-21taskset12:18:013
46777799161,11cyclictest854842-21taskset11:40:153
46777799161,11cyclictest713827-21taskset10:06:063
46777799161,11cyclictest697637-21taskset09:55:243
46777799161,11cyclictest597879-21taskset08:50:143
46777799161,11cyclictest576720-21taskset08:30:173
46777799161,11cyclictest476697-21taskset07:15:143
46777799161,10cyclictest7820152sleep310:50:243
46777799161,10cyclictest7820152sleep310:50:233
7761962151,6sleep1776200-21ssh10:49:081
467777991513,1cyclictest0-21swapper/307:41:233
467777991513,0cyclictest0-21swapper/308:43:593
467777991512,1cyclictest0-21swapper/312:30:513
467777991512,1cyclictest0-21swapper/312:29:103
467777991512,1cyclictest0-21swapper/312:13:023
467777991512,1cyclictest0-21swapper/307:55:423
467777991512,1cyclictest0-21swapper/307:30:543
46777799151,11cyclictest943965-21taskset12:36:153
46777799151,11cyclictest883504-21taskset11:59:043
46777799151,11cyclictest829573-21taskset11:23:243
46777799151,11cyclictest805644-21taskset11:05:343
46777799151,11cyclictest769049-21taskset10:45:013
46777799151,11cyclictest745398-21taskset10:28:533
46777799151,11cyclictest659166-21taskset09:30:213
46777799151,11cyclictest630671-21taskset09:15:003
46777799151,11cyclictest539793-21taskset08:01:253
46777799151,11cyclictest518319-21taskset07:45:183
46777799151,10cyclictest874681-21taskset11:50:303
46777799151,10cyclictest807363-21taskset11:10:083
46777799151,10cyclictest794938-21taskset11:00:163
46777799151,10cyclictest762423-21taskset10:40:153
46777799151,10cyclictest759088-21taskset10:35:233
46777799151,10cyclictest6386232sleep309:20:113
46777799151,10cyclictest604096-21chrt08:55:123
46777799151,10cyclictest604096-21chrt08:55:113
46777799151,10cyclictest5913472sleep308:45:143
46777799151,10cyclictest494429-21taskset07:25:203
46777799145,7cyclictest565344-21taskset08:23:003
46777799142,8cyclictest7000852sleep310:00:143
46777799141,9cyclictest482930-21chrt07:20:123
467777991412,0cyclictest0-21swapper/309:50:443
467777991411,1cyclictest0-21swapper/311:47:533
467777991411,1cyclictest0-21swapper/307:50:213
46777799141,10cyclictest890061-21taskset12:00:343
46777799141,10cyclictest836918-21taskset11:27:243
46777799141,10cyclictest790739-21taskset10:57:053
46777799141,10cyclictest721401-21taskset10:10:523
46777799141,10cyclictest674576-21taskset09:40:193
46777799141,10cyclictest631133-21taskset09:15:123
46777799141,10cyclictest616235-21taskset09:00:283
46777799141,10cyclictest584108-21taskset08:35:273
46777799141,10cyclictest571605-21taskset08:26:043
46777799141,10cyclictest558913-21taskset08:17:053
46777799141,10cyclictest552535-21taskset08:11:573
46777799140,11cyclictest838072-21taskset11:30:003
4889682131,8sleep21-21systemd07:25:012
4673972130,3sleep30-21swapper/307:06:463
7154452121,7sleep2715447-21apt-get10:10:122
8995712110,8sleep0899722-21/usr/sbin/munin12:10:130
8835032111,8sleep2883501-21ssh11:59:042
8224322111,3sleep00-21swapper/011:20:000
7514462111,7sleep2746059-21/usr/sbin/munin10:30:242
5005632110,8sleep1500725-21tail07:30:211
4896912110,2sleep2490644-21irqrtprio07:25:162
4616602111,4sleep10-21swapper/107:05:111
9290182101,6sleep0929024-21ssh12:27:190
8920702100,1sleep20-21swapper/212:05:132
8856262100,2sleep2887128-21kthreadcore12:00:182
8300762100,7sleep2830083-21ssh11:24:562
6361012100,3sleep1636142-21ntpq09:15:191
6042562104,3sleep1604449-21gltestperf08:55:151
6042562104,3sleep1604449-21gltestperf08:55:141
5837182101,5sleep2583760-21ntpq08:35:232
5786022101,5sleep1578599-21apt-get08:35:141
5518722101,5sleep0551914-21ntpq08:10:220
5464312101,6sleep2546482-21munin-run08:10:002
4958422100,7sleep0496015-21gltestperf07:30:160
4855332100,7sleep0487531-21tr07:20:180
907782291,6sleep0908707-21/usr/sbin/munin12:15:160
906736290,3sleep1906742-21ssh12:14:371
905918291,5sleep2905924-21ssh12:12:012
873987292,4sleep0874039-21ntpq11:50:210
861780291,5sleep10-21swapper/111:45:161
859522290,5sleep2859529-21ssh11:41:072
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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