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2026-07-05 - 13:29

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 Sun Jul 05, 2026 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2702721020,7sleep127029-21unixbench_multi08:00:151
1678699963,21cyclictest9524-21diskmemload09:34:530
1678699963,21cyclictest9524-21diskmemload09:34:530
1678699914,26cyclictest0-21swapper/008:40:490
16786999116,21cyclictest0-21swapper/009:52:590
1678699903,24cyclictest0-21swapper/010:10:350
1678699903,24cyclictest0-21swapper/010:10:350
1678699894,30cyclictest0-21swapper/008:14:410
1678699894,30cyclictest0-21swapper/008:14:410
1678699884,23cyclictest0-21swapper/011:38:210
1678699874,26cyclictest0-21swapper/009:25:080
16786998718,12cyclictest0-21swapper/006:50:310
1678699864,35cyclictest0-21swapper/010:25:190
1678699864,27cyclictest0-21swapper/011:39:550
1678699864,25cyclictest0-21swapper/009:19:530
1678699864,24cyclictest0-21swapper/009:57:140
1678699864,12cyclictest0-21swapper/011:11:580
1678699863,26cyclictest0-21swapper/007:55:020
1678699856,22cyclictest0-21swapper/010:46:280
1678699854,26cyclictest0-21swapper/011:48:090
1678699854,26cyclictest0-21swapper/008:58:340
1678699854,26cyclictest0-21swapper/008:58:340
1678699854,26cyclictest0-21swapper/007:18:000
1678699854,24cyclictest0-21swapper/010:44:300
1678699854,23cyclictest0-21swapper/008:54:030
1678699854,12cyclictest0-21swapper/011:33:290
1678699854,12cyclictest0-21swapper/011:33:290
1678699853,12cyclictest0-21swapper/009:14:280
1678999845,72cyclictest21318-21sendmail_mailqu10:25:072
1678699845,34cyclictest0-21swapper/010:02:230
1678699844,26cyclictest0-21swapper/010:15:100
1678699844,26cyclictest0-21swapper/009:30:490
1678699844,25cyclictest0-21swapper/011:19:310
1678699844,24cyclictest0-21swapper/008:45:010
1678699843,20cyclictest26084-21ssh10:33:430
1678699843,12cyclictest0-21swapper/010:58:050
1678699843,12cyclictest0-21swapper/010:58:050
1678699839,18cyclictest17549-21ssh11:55:020
1678699834,72cyclictest0-21swapper/009:45:480
1678699834,28cyclictest0-21swapper/011:04:480
1678699834,25cyclictest0-21swapper/011:50:270
1678699834,25cyclictest0-21swapper/008:38:030
1678699834,23cyclictest0-21swapper/012:02:560
1678699834,22cyclictest0-21swapper/009:17:430
1678699833,25cyclictest0-21swapper/010:09:270
219499820,4rtkit-daemon2193-21rtkit-daemon06:55:253
1678699824,26cyclictest0-21swapper/007:25:120
1678699824,24cyclictest0-21swapper/009:03:560
1678699824,22cyclictest0-21swapper/010:59:390
1678699823,25cyclictest0-21swapper/011:23:570
1678999814,69cyclictest0-21swapper/209:38:242
1678999814,69cyclictest0-21swapper/209:38:242
1678699818,22cyclictest0-21swapper/009:39:560
1678699814,33cyclictest0-21swapper/008:00:010
1678699814,24cyclictest0-21swapper/010:54:230
1678699814,24cyclictest0-21swapper/010:54:230
1678699813,33cyclictest17494-21unixbench_multi07:40:150
1678699813,33cyclictest0-21swapper/010:34:540
1678999806,67cyclictest0-21swapper/210:38:242
1678999802,32cyclictest107550irq/46-eth010:57:372
1678999802,32cyclictest107550irq/46-eth010:57:372
1678699804,33cyclictest0-21swapper/011:25:010
16786998019,12cyclictest0-21swapper/006:36:040
1678999794,69cyclictest0-21swapper/211:32:142
1678999794,69cyclictest0-21swapper/211:32:142
1678699794,33cyclictest0-21swapper/010:21:360
1678699793,38cyclictest0-21swapper/008:05:230
1678999784,56cyclictest0-21swapper/211:35:012
1678999783,67cyclictest0-21swapper/210:31:212
1678999777,64cyclictest0-21swapper/208:25:032
1678999774,68cyclictest0-21swapper/211:59:532
1678999774,68cyclictest0-21swapper/209:01:412
1678999773,68cyclictest0-21swapper/209:17:502
1678999773,48cyclictest26314-21latency_hist06:54:452
16789997716,45cyclictest0-21swapper/208:57:142
16789997716,45cyclictest0-21swapper/208:57:142
16786997723,12cyclictest0-21swapper/007:35:030
1678999767,62cyclictest2215-21gdm-simple-gree10:02:352
1678999764,66cyclictest0-21swapper/210:10:102
1678999764,66cyclictest0-21swapper/210:10:102
1678999764,66cyclictest0-21swapper/208:40:042
1678999763,33cyclictest0-21swapper/209:33:382
16789997623,46cyclictest30123-21ssh09:50:132
1678999762,66cyclictest120251ssh11:48:012
1678999757,52cyclictest0-21swapper/210:59:472
1678999755,51cyclictest21516-21telnet11:14:462
1678999754,65cyclictest0-21swapper/209:06:222
1678999754,65cyclictest0-21swapper/208:34:402
1678999754,64cyclictest0-21swapper/210:40:242
1678999754,61cyclictest30548-21df_abs08:09:572
1678999754,61cyclictest30548-21df_abs08:09:572
1678999753,51cyclictest0-21swapper/211:14:312
16789997517,52cyclictest12112-21load07:30:052
16789997517,52cyclictest12112-21load07:30:052
1678999745,63cyclictest0-21swapper/207:10:062
1678999744,64cyclictest0-21swapper/210:06:312
1678999744,64cyclictest0-21swapper/209:44:382
1678999744,51cyclictest0-21swapper/210:46:372
1678999743,64cyclictest0-21swapper/211:07:272
1678999743,63cyclictest11622-21vmstat08:35:152
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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