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2026-05-11 - 14:31

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #4

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 rack0slot4s.osadl.org (updated Mon May 11, 2026 00:46:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21959282385365,13sleep60-21swapper/619:06:2612
21960952369349,13sleep110-21swapper/1119:08:403
21961522366345,14sleep100-21swapper/1019:09:282
21959012364325,13sleep40-21swapper/419:06:0710
21960362361323,31sleep130-21swapper/1319:07:535
21927282358338,13sleep90-21swapper/919:05:0915
21959892354344,7sleep120-21swapper/1219:07:204
21959122351331,13sleep150-21swapper/1519:06:197
21961252350330,13sleep70-21swapper/719:09:0813
21961842349328,13sleep50-21swapper/519:09:5411
21961582349328,14sleep140-21swapper/1419:09:326
21959512348328,13sleep80-21swapper/819:06:4514
21961632345325,13sleep20-21swapper/219:09:368
21960432345326,13sleep30-21swapper/319:08:009
21959152345326,12sleep10-21swapper/119:06:211
21959432344324,13sleep00-21swapper/019:06:370
219658699441,24cyclictest0-21swapper/1423:05:386
219658699413,25cyclictest2463659-21ssh23:16:376
2196550994030,0cyclictest0-21swapper/200:06:408
2196550993835,3cyclictest2373550-21kworker/u32:3+flush-259:022:37:238
219658699371,11cyclictest0-21swapper/1420:42:506
2196583993737,0cyclictest0-21swapper/1320:04:405
2196583993535,0cyclictest0-21swapper/1321:33:045
2196583993535,0cyclictest0-21swapper/1321:28:565
2196581993535,0cyclictest0-21swapper/1223:10:004
2196581993535,0cyclictest0-21swapper/1220:39:524
2196581993434,0cyclictest0-21swapper/1219:38:574
2196581993434,0cyclictest0-21swapper/1219:12:494
2196550993433,1cyclictest2463037-21kworker/u32:4+events_unbound23:44:068
2196550993431,1cyclictest2469512-21kworker/u32:0+flush-259:000:21:148
2196550993431,1cyclictest2469512-21kworker/u32:0+flush-259:000:21:148
2196550993430,4cyclictest2316827-21kworker/u32:4+events_unbound21:50:208
2196550993430,3cyclictest1769-21arpwatch21:15:528
2196550993430,3cyclictest1769-21arpwatch21:15:518
219658699339,11cyclictest0-21swapper/1400:11:326
2196583993331,1cyclictest0-21swapper/1319:25:035
2196550993333,0cyclictest0-21swapper/200:37:208
219658699320,0cyclictest0-21swapper/1400:20:146
219658699320,0cyclictest0-21swapper/1400:20:146
2196583993232,0cyclictest0-21swapper/1322:59:065
2196583993232,0cyclictest0-21swapper/1321:11:005
2196583993232,0cyclictest0-21swapper/1321:11:005
2196581993230,1cyclictest2124610-21kworker/12:0+mm_percpu_wq19:25:044
219658199321,30cyclictest1321ktimers/1221:25:304
2196550993232,0cyclictest0-21swapper/221:45:308
2196550993231,1cyclictest2272287-21kworker/u32:4+flush-259:020:50:188
2196550993229,3cyclictest0-21swapper/221:58:408
2196550993229,0cyclictest43-21ksoftirqd/223:46:088
2196550993228,1cyclictest1769-21arpwatch23:15:208
219658899310,30cyclictest0-21swapper/1522:11:467
219658899310,30cyclictest0-21swapper/1520:15:037
219658899310,30cyclictest0-21swapper/1519:30:437
219658699310,30cyclictest0-21swapper/1421:20:566
219658699310,30cyclictest0-21swapper/1421:20:556
219658699310,30cyclictest0-21swapper/1400:02:296
2196583993131,0cyclictest0-21swapper/1323:52:325
2196583993131,0cyclictest0-21swapper/1322:34:105
2196583993131,0cyclictest0-21swapper/1321:17:305
2196583993131,0cyclictest0-21swapper/1321:17:305
2196583993131,0cyclictest0-21swapper/1300:27:205
2196583993131,0cyclictest0-21swapper/1300:27:205
219658399312,0cyclictest211rcu_preempt00:32:165
2196581993131,0cyclictest0-21swapper/1220:28:024
2196581993131,0cyclictest0-21swapper/1220:07:304
219657699310,30cyclictest0-21swapper/1123:58:403
219657199310,30cyclictest0-21swapper/900:20:1415
219657199310,30cyclictest0-21swapper/900:20:1415
2196567993130,1cyclictest1774-21snmpd22:49:5014
219656799310,30cyclictest0-21swapper/822:15:3114
219656599310,30cyclictest0-21swapper/722:00:5413
219656599310,30cyclictest0-21swapper/721:11:2613
219656599310,30cyclictest0-21swapper/721:11:2613
219656299310,30cyclictest0-21swapper/623:35:1612
219656299310,30cyclictest0-21swapper/600:31:2912
219656099310,28cyclictest0-21swapper/521:20:1511
219656099310,28cyclictest0-21swapper/521:20:1511
2196555993129,1cyclictest1774-21snmpd22:41:0510
2196553993130,1cyclictest1774-21snmpd21:30:079
219655399310,30cyclictest0-21swapper/322:32:009
219655399310,30cyclictest0-21swapper/300:29:389
219655399310,30cyclictest0-21swapper/300:29:389
2196550993131,0cyclictest0-21swapper/223:58:028
2196550993131,0cyclictest0-21swapper/223:14:168
2196550993131,0cyclictest0-21swapper/222:55:388
2196550993131,0cyclictest0-21swapper/222:31:468
2196550993131,0cyclictest0-21swapper/221:11:388
2196550993131,0cyclictest0-21swapper/221:11:388
2196550993128,3cyclictest1769-21arpwatch22:05:388
2196550993127,2cyclictest2469512-21kworker/u32:0+flush-259:023:25:468
219655099310,30cyclictest0-21swapper/222:25:148
219655099310,30cyclictest0-21swapper/219:55:168
2196546993130,1cyclictest1774-21snmpd23:18:511
2196546993130,1cyclictest1774-21snmpd22:22:191
219654699310,30cyclictest0-21swapper/121:38:201
219654699310,30cyclictest0-21swapper/121:15:231
219654699310,30cyclictest0-21swapper/121:15:231
219654699310,30cyclictest0-21swapper/119:15:151
219654499318,1cyclictest0-21swapper/020:27:330
2196544993131,0cyclictest0-21swapper/022:59:220
2196588993029,1cyclictest1774-21snmpd21:23:147
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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