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2026-04-13 - 19:43

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, 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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  Intel
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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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack1slot6s.osadl.org (updated Mon Apr 13, 2026 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2560421520,43sleep01271599cyclictest10:06:260
146921040,4sleep01466-21grep07:56:160
12715991034,9cyclictest1419-21runrttasks07:17:430
1271599994,13cyclictest0-21swapper/009:31:150
1272499984,27cyclictest5455-21diskmemload08:41:312
1272499984,27cyclictest5455-21diskmemload08:41:312
1272499964,37cyclictest18117-21df08:21:132
1272499963,39cyclictest0-21swapper/208:53:362
1271599954,75cyclictest0-21swapper/008:56:190
1271599954,12cyclictest0-21swapper/008:11:110
12715999511,58cyclictest0-21swapper/008:01:130
12715999511,58cyclictest0-21swapper/008:01:130
1271599944,12cyclictest0-21swapper/007:35:590
1272499935,25cyclictest0-21swapper/210:11:182
12724999320,10cyclictest11900-21yum-updatesd-he09:00:392
12724999312,27cyclictest0-21swapper/209:45:542
1272499925,25cyclictest0-21swapper/207:22:352
1272499924,12cyclictest0-21swapper/208:15:222
1271599924,80cyclictest0-21swapper/009:16:100
1271599924,80cyclictest0-21swapper/009:16:100
1271599924,12cyclictest0-21swapper/010:36:030
1271599923,10cyclictest0-21swapper/010:25:340
1271599923,10cyclictest0-21swapper/010:15:420
1271599923,10cyclictest0-21swapper/009:56:230
1272499915,35cyclictest0-21swapper/207:20:592
1272499914,34cyclictest0-21swapper/209:26:032
1272499914,31cyclictest0-21swapper/208:10:572
1272499914,27cyclictest0-21swapper/210:41:142
1272499914,26cyclictest0-21swapper/209:02:032
1272499914,24cyclictest6042-21ssh10:26:162
1272499913,39cyclictest0-21swapper/208:38:262
1272499913,39cyclictest0-21swapper/208:38:262
12724999121,12cyclictest3792-21yum-updatesd-he08:00:402
12724999119,12cyclictest0-21swapper/209:37:382
12724999118,10cyclictest2792-21ssh08:46:132
1271599913,9cyclictest24392-21munin-node08:31:170
1271599913,62cyclictest9198-21basename07:21:110
1271599913,13cyclictest0-21swapper/008:38:150
1271599913,13cyclictest0-21swapper/008:38:150
1271599913,10cyclictest0-21swapper/010:30:160
1272499905,25cyclictest0-21swapper/209:41:042
1272499904,24cyclictest0-21swapper/209:35:392
1272499904,21cyclictest16987-21ssh09:06:212
1271599904,11cyclictest0-21swapper/007:41:100
1271599903,11cyclictest0-21swapper/007:54:400
1272499894,38cyclictest0-21swapper/207:36:322
1272499894,36cyclictest0-21swapper/210:19:292
1272499894,35cyclictest0-21swapper/206:06:212
1272499894,35cyclictest0-21swapper/206:06:212
1272499894,24cyclictest0-21swapper/210:33:012
1272499894,24cyclictest0-21swapper/210:22:062
1272499894,24cyclictest0-21swapper/210:04:412
1272499894,24cyclictest0-21swapper/210:04:412
1272499893,10cyclictest15676-21sshd09:51:452
12724998919,9cyclictest5882-21wc08:01:312
12724998919,9cyclictest5882-21wc08:01:312
12724998919,13cyclictest0-21swapper/207:51:182
12724998915,10cyclictest25598-21missed_timers08:31:212
1271599894,12cyclictest0-21swapper/009:09:250
1271599894,12cyclictest0-21swapper/006:56:180
1271599893,11cyclictest0-21swapper/007:26:330
1271599893,11cyclictest0-21swapper/007:26:330
12715998919,47cyclictest0-21swapper/007:46:330
12715998913,52cyclictest121850irq/46-eth007:40:590
1272499888,21cyclictest26989-21diskstats07:46:152
1272499884,24cyclictest0-21swapper/208:26:192
12724998834,45cyclictest16403-21cut07:31:142
1271599884,77cyclictest0-21swapper/010:17:300
1271599884,13cyclictest0-21swapper/008:41:100
1271599884,13cyclictest0-21swapper/008:41:100
1271599884,12cyclictest0-21swapper/009:26:140
1271599884,12cyclictest0-21swapper/006:36:150
1271599883,67cyclictest0-21swapper/009:01:430
248599870,5rtkit-daemon2484-21rtkit-daemon10:36:253
1272499875,30cyclictest24248-21unixbench_singl05:36:362
1272499874,28cyclictest0-21swapper/210:36:052
1272499874,23cyclictest0-21swapper/207:42:262
1272499873,12cyclictest0-21swapper/208:18:412
1271599874,8cyclictest7922-21kworker/0:108:06:280
1271599873,9cyclictest17271-21taskset10:42:300
1271599873,11cyclictest0-21swapper/009:47:470
1271599873,11cyclictest0-21swapper/008:26:060
12715998716,47cyclictest0-21swapper/009:41:040
12715998714,52cyclictest0-21swapper/006:18:470
1272499864,25cyclictest0-21swapper/207:26:222
1272499864,25cyclictest0-21swapper/207:26:222
1272499864,24cyclictest0-21swapper/209:55:542
12724998617,13cyclictest0-21swapper/210:08:362
12724998611,20cyclictest0-21swapper/209:11:262
1271599869,54cyclictest121850irq/46-eth005:36:300
1271599864,63cyclictest0-21swapper/008:22:500
1271599863,63cyclictest0-21swapper/010:05:510
1271599863,63cyclictest0-21swapper/010:05:510
1272499854,34cyclictest0-21swapper/206:26:012
1272499854,27cyclictest0-21swapper/206:41:212
1272499854,25cyclictest0-21swapper/209:21:122
1271599859,59cyclictest0-21swapper/009:54:410
1271599854,74cyclictest0-21swapper/009:11:090
1271599854,59cyclictest0-21swapper/009:36:240
1271599854,12cyclictest0-21swapper/010:31:100
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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