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2026-04-30 - 23:20

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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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 Thu Apr 30, 2026 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3512999931,51cyclictest5028-21ssh10:25:100
3512999629,14cyclictest0-21swapper/009:20:250
351299924,39cyclictest0-21swapper/007:35:150
351299924,37cyclictest0-21swapper/009:15:120
3512999224,9cyclictest1836-21grep07:55:470
3512999222,12cyclictest0-21swapper/010:16:000
3512999122,12cyclictest0-21swapper/007:25:110
3512999122,11cyclictest0-21swapper/005:50:160
3512999122,11cyclictest0-21swapper/005:50:160
351299903,42cyclictest0-21swapper/007:44:260
3512999028,9cyclictest9411-21crond06:20:020
351299894,46cyclictest0-21swapper/007:45:170
3512998923,10cyclictest28749-21unixbench_multi07:00:340
3512998831,7cyclictest15556-21ssh07:30:110
351299878,13cyclictest0-21swapper/008:27:300
3512998731,10cyclictest21962-21crond06:50:010
3512998723,12cyclictest0-21swapper/008:52:240
3512998629,8cyclictest896-21munin-node10:20:200
3512998531,8cyclictest4756-21ssh08:49:570
351299843,37cyclictest0-21swapper/009:00:100
3512998429,7cyclictest14904-21ssh08:15:250
3512998428,9cyclictest27206-21ssh08:35:090
3512998422,12cyclictest0-21swapper/005:05:250
3512998421,12cyclictest0-21swapper/008:20:240
3512998326,19cyclictest0-21swapper/008:30:400
3512998323,12cyclictest0-21swapper/009:55:220
3512998318,13cyclictest0-21swapper/008:05:110
3512998219,10cyclictest10492-21unixbench_singl07:20:360
3512998129,8cyclictest1287-21snmpd05:28:020
3512998126,13cyclictest0-21swapper/005:45:190
3512998025,7cyclictest26759-21diskmemload07:08:250
3512998021,12cyclictest0-21swapper/010:14:540
248599800,6rtkit-daemon2484-21rtkit-daemon10:00:030
248599800,6rtkit-daemon2484-21rtkit-daemon10:00:030
167262800,2sleep2281ktimersoftd/208:19:582
3512997829,7cyclictest26759-21diskmemload08:55:080
351299773,15cyclictest0-21swapper/005:40:040
351299753,15cyclictest0-21swapper/010:05:160
351599735,61cyclictest0-21swapper/308:03:053
351599735,61cyclictest0-21swapper/308:03:053
351599734,62cyclictest0-21swapper/310:20:043
351299734,16cyclictest0-21swapper/007:15:190
351299734,16cyclictest0-21swapper/007:15:190
351299724,14cyclictest0-21swapper/009:40:250
351599714,60cyclictest4554-21grep05:00:213
351599704,59cyclictest0-21swapper/309:44:293
351599694,58cyclictest0-21swapper/309:55:203
351499693,57cyclictest0-21swapper/207:25:112
351599684,57cyclictest0-21swapper/309:36:173
3513996842,9cyclictest15425-21munin-node09:05:091
351499673,57cyclictest6047-21ssh09:39:372
351499673,29cyclictest0-21swapper/209:25:052
351399675,54cyclictest0-21swapper/107:05:351
351599664,56cyclictest0-21swapper/307:44:003
351599664,55cyclictest0-21swapper/305:40:043
351499654,54cyclictest0-21swapper/209:45:282
351499654,53cyclictest0-21swapper/210:25:252
351499653,54cyclictest31780-21rm07:53:432
351499653,54cyclictest0-21swapper/210:09:532
351499653,53cyclictest0-21swapper/208:45:292
351599644,53cyclictest0-21swapper/306:16:133
351599643,55cyclictest0-21swapper/308:45:333
351499643,53cyclictest0-21swapper/206:15:162
351499643,52cyclictest0-21swapper/208:20:212
3513996436,13cyclictest0-21swapper/107:32:471
351599634,53cyclictest0-21swapper/308:40:263
351599634,53cyclictest0-21swapper/308:40:263
351499634,51cyclictest0-21swapper/209:05:092
3514996330,13cyclictest0-21swapper/209:12:172
351499633,53cyclictest13109-21ssh09:49:562
351499633,53cyclictest0-21swapper/207:15:282
351499633,53cyclictest0-21swapper/207:15:282
351499633,52cyclictest0-21swapper/209:40:242
3514996314,42cyclictest32579-21ssh07:06:312
3513996340,7cyclictest2695-21ssh08:45:201
3513996338,12cyclictest0-21swapper/108:54:211
3513996337,12cyclictest0-21swapper/108:57:521
66172623,51sleep10-21swapper/109:40:091
3514996233,12cyclictest0-21swapper/209:31:002
351499623,53cyclictest26759-21diskmemload10:03:582
351499623,53cyclictest26759-21diskmemload10:03:582
351499623,53cyclictest0-21swapper/208:40:132
351499623,53cyclictest0-21swapper/208:40:132
351499623,51cyclictest0-21swapper/207:44:572
351499623,51cyclictest0-21swapper/207:14:562
351499622,51cyclictest17739-21cut06:35:232
351499622,51cyclictest17739-21cut06:35:232
351399626,50cyclictest0-21swapper/109:45:241
351399625,50cyclictest0-21swapper/107:15:201
351399625,50cyclictest0-21swapper/107:15:201
3513996238,10cyclictest0-21swapper/106:20:201
3513996237,11cyclictest0-21swapper/109:35:141
3513996235,12cyclictest0-21swapper/110:25:271
3513996235,12cyclictest0-21swapper/109:26:281
3513996235,12cyclictest0-21swapper/108:16:231
248599620,5rtkit-daemon2484-21rtkit-daemon09:33:420
351599615,15cyclictest0-21swapper/309:32:253
351599613,51cyclictest0-21swapper/305:25:553
3515996118,19cyclictest7251-21ls08:05:123
351499614,49cyclictest0-21swapper/209:55:202
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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