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2026-01-07 - 22:09

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #6

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 100 highest latencies:
System rack0slot6s.osadl.org (updated Wed Jan 07, 2026 00:46:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
29574612270264,4sleep10-21swapper/119:09:111
29575362245201,13sleep50-21swapper/519:09:5515
29571602240231,6sleep170-21swapper/1719:05:469
29572632239218,13sleep180-21swapper/1819:07:0810
29574422237217,12sleep100-21swapper/1019:09:002
29574872236229,4sleep160-21swapper/1619:09:268
29571762235215,13sleep110-21swapper/1119:06:013
29574732233212,13sleep80-21swapper/819:09:1818
29571842233209,15sleep190-21swapper/1919:06:0911
29571192232226,4sleep150-21swapper/1519:05:247
29573392231211,12sleep120-21swapper/1219:08:024
29573252230210,13sleep00-21swapper/019:07:500
29572492230211,12sleep40-21swapper/419:06:5414
29572162228207,13sleep30-21swapper/319:06:3313
29571902228210,11sleep20-21swapper/219:06:1112
29572232227207,12sleep70-21swapper/719:06:3717
29573402221201,13sleep130-21swapper/1319:08:035
29572812221201,12sleep90-21swapper/919:07:1919
29572592221202,12sleep140-21swapper/1419:07:046
29573612219198,13sleep60-21swapper/619:08:1616
2957980994619,26cyclictest0-21swapper/1523:20:587
2957980994315,28cyclictest0-21swapper/1519:22:597
2957954994114,26cyclictest761irq_work/619:33:0016
295794799408,26cyclictest0-21swapper/423:27:5814
295794799408,26cyclictest0-21swapper/423:27:5814
2957975993912,25cyclictest0-21swapper/1321:17:595
295797999389,27cyclictest1501irq_work/1419:47:596
295795699385,27cyclictest851irq_work/700:15:5917
194899380,0ntpd0-21swapper/423:52:3514
2957990993710,26cyclictest0-21swapper/1819:46:0010
295794999379,27cyclictest671irq_work/520:39:5915
295799599369,27cyclictest0-21swapper/1921:35:5911
295799099369,26cyclictest1861irq_work/1819:52:0010
2957971993636,0cyclictest0-21swapper/1221:06:594
2957934993610,25cyclictest261irq_work/023:09:580
295799099356,28cyclictest1861irq_work/1819:43:5910
295798099350,22cyclictest0-21swapper/1519:36:257
295793899359,26cyclictest0-21swapper/122:59:591
2957971993434,0cyclictest0-21swapper/1223:46:584
295796999348,25cyclictest1231irq_work/1123:58:583
295794999340,33cyclictest0-21swapper/519:11:5915
295795999330,33cyclictest0-21swapper/820:00:5318
295795999330,33cyclictest0-21swapper/820:00:5318
295794999330,27cyclictest0-21swapper/521:53:5915
295794999330,0cyclictest0-21swapper/522:03:1415
295794499330,32cyclictest0-21swapper/319:45:5913
2957990993232,0cyclictest0-21swapper/1820:29:5910
295799099320,0cyclictest0-21swapper/1819:36:2510
295798099327,1cyclictest183150irq/150-eno119:56:247
2957966993232,0cyclictest0-21swapper/1021:06:592
2957949993218,0cyclictest0-21swapper/500:27:2415
295794799326,26cyclictest0-21swapper/419:27:5914
295793499320,31cyclictest0-21swapper/020:01:590
295793499320,31cyclictest0-21swapper/020:01:590
295798799315,0cyclictest0-21swapper/1719:33:599
295797999319,17cyclictest0-21swapper/1421:35:006
295797999313,27cyclictest0-21swapper/1420:38:596
2957979993124,7cyclictest0-21swapper/1419:30:146
2957949993131,0cyclictest0-21swapper/522:22:5915
2957949993131,0cyclictest0-21swapper/519:40:1115
2957949993131,0cyclictest0-21swapper/500:05:5815
2957949993118,0cyclictest0-21swapper/500:15:5715
2957949993118,0cyclictest0-21swapper/500:14:5615
2957944993131,0cyclictest0-21swapper/320:14:5913
2957944993131,0cyclictest0-21swapper/320:14:5913
2957940993131,0cyclictest0-21swapper/219:45:5912
295793499314,25cyclictest31109561kworker/u80:4+i91523:18:580
295793499310,31cyclictest0-21swapper/019:19:280
2957990993030,0cyclictest0-21swapper/1823:37:2110
2957990993030,0cyclictest0-21swapper/1823:37:2110
295797999307,22cyclictest0-21swapper/1423:20:586
295797999303,27cyclictest0-21swapper/1419:22:596
2957979993030,0cyclictest0-21swapper/1400:37:496
295797599300,30cyclictest0-21swapper/1319:22:595
295797199304,23cyclictest1341rcuc/1219:13:594
295797199303,4cyclictest0-21swapper/1221:17:594
2957971993022,6cyclictest326420-21CPU4
295797199300,0cyclictest0-21swapper/1200:15:004
295796699304,25cyclictest1121irq_work/1000:34:592
2957959993030,0cyclictest0-21swapper/819:45:5918
295795999301,29cyclictest29496491kworker/u80:2+i91519:40:5918
2957949993030,0cyclictest0-21swapper/519:36:2515
2957944993030,0cyclictest0-21swapper/319:55:1313
2957934993030,0cyclictest0-21swapper/020:29:070
2957934993029,0cyclictest0-21swapper/022:03:150
2957995992929,0cyclictest0-21swapper/1900:15:5611
295799599292,26cyclictest1951irq_work/1919:53:2111
2957990992929,0cyclictest0-21swapper/1819:30:0010
2957990992929,0cyclictest0-21swapper/1819:22:5910
295798599291,1cyclictest326418-21CPU8
2957980992928,1cyclictest183150irq/150-eno122:46:537
295798099290,2cyclictest3085027-21ls21:39:597
295798099290,28cyclictest0-21swapper/1522:39:497
295798099290,21cyclictest0-21swapper/1522:03:597
295798099290,19cyclictest3208923-21expr00:05:127
295797999293,25cyclictest0-21swapper/1422:25:226
2957979992929,0cyclictest0-21swapper/1422:05:226
2957979992928,1cyclictest0-21swapper/1400:12:596
295797999292,27cyclictest1521rcuc/1421:16:596
2957975992929,0cyclictest0-21swapper/1320:07:005
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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