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2026-08-12 - 06:03

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #3

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.

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 50 highest latencies:
System rack0slot3s.osadl.org (updated Wed Aug 12, 2026 00:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
39245782272263,6sleep70-21swapper/718:51:067
39245552265216,18sleep30-21swapper/318:50:443
39245452262215,16sleep20-21swapper/218:50:352
39244962261214,16sleep40-21swapper/418:49:544
39223662253211,33sleep60-21swapper/618:48:066
39246352246221,17sleep00-21swapper/018:51:490
39245852246219,17sleep50-21swapper/518:51:115
39243942242218,16sleep10-21swapper/118:48:441
3925025993733,2cyclictest0-21swapper/000:13:490
3925056993530,4cyclictest0-21swapper/621:31:026
392505699350,31cyclictest0-21swapper/623:37:096
392505699350,1cyclictest0-21swapper/600:19:036
3925038993519,15cyclictest3592006-21kworker/2:0+mm_percpu_wq20:17:302
392504499340,33cyclictest0-21swapper/323:26:353
3925038993228,2cyclictest0-21swapper/200:34:492
3925044993029,1cyclictest0-21swapper/300:13:483
3925038993026,2cyclictest0-21swapper/222:23:442
3925038992925,2cyclictest4072288-21cat23:31:432
3925038992922,3cyclictest4062461-21smartctl23:10:562
3925038992922,3cyclictest3945051-21cat19:30:012
392503399290,29cyclictest0-21swapper/122:18:151
3925025992927,1cyclictest0-21swapper/000:34:490
3925056992821,6cyclictest1390-21snmpd19:40:546
3925056992821,6cyclictest1390-21snmpd19:40:536
3925038992826,1cyclictest3941092-21ntpq19:19:522
3925038992823,4cyclictest3996206-21ntpq21:04:532
3925025992825,2cyclictest4038037-21sed22:23:440
392506299270,25cyclictest3956321-21/usr/sbin/munin19:51:377
392504799270,25cyclictest0-21swapper/419:29:054
3925044992726,1cyclictest0-21swapper/300:34:493
392504499270,25cyclictest0-21swapper/322:12:073
392504499270,25cyclictest0-21swapper/322:12:073
3925038992725,1cyclictest3935649-21ntpq19:09:242
3925038992723,2cyclictest0-21swapper/218:53:372
3925038992720,5cyclictest1384-21arpwatch21:54:592
392503899270,25cyclictest0-21swapper/219:53:552
3925056992621,4cyclictest1390-21snmpd20:50:586
3925056992620,5cyclictest1390-21snmpd20:25:146
392505699261,25cyclictest0-21swapper/623:07:506
3925053992621,4cyclictest1390-21snmpd22:05:205
392505399260,24cyclictest0-21swapper/521:41:315
392505399260,23cyclictest0-21swapper/520:01:505
392505399260,22cyclictest0-21swapper/520:13:315
392504799260,24cyclictest0-21swapper/421:48:284
392504799260,24cyclictest0-21swapper/420:52:264
3925038992623,2cyclictest1384-21arpwatch20:16:262
3925038992622,2cyclictest401ktimers/222:49:452
3925038992622,2cyclictest0-21swapper/221:41:392
3925038992621,4cyclictest4043998-21munin-run22:39:012
3925038992621,3cyclictest4056786-21ntp_states23:00:252
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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