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2026-08-16 - 03:37

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 Sun Aug 16, 2026 00:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
30221991103,100cyclictest935-21cpu20:10:522
30216991064,52cyclictest1227-21runrttasks21:31:100
30216991064,52cyclictest1227-21runrttasks21:31:100
2938721040,26sleep20-21swapper/222:30:532
30216991034,52cyclictest0-21swapper/022:37:070
30216991034,51cyclictest8053-21taskset21:10:370
30216991014,50cyclictest0-21swapper/021:26:010
30221991009,10cyclictest7150irq/45-ahci21:35:162
30221991009,10cyclictest7150irq/45-ahci21:35:162
3021699994,53cyclictest0-21swapper/023:15:540
30220999831,12cyclictest0-21swapper/121:36:071
3021699974,50cyclictest0-21swapper/020:31:060
3021699964,46cyclictest21129-21df20:40:530
3022199953,47cyclictest0-21swapper/221:09:222
30220999524,23cyclictest0-21swapper/119:26:031
219499950,5rtkit-daemon2193-21rtkit-daemon20:11:113
30220999432,10cyclictest0-21swapper/121:47:451
3022199934,53cyclictest0-21swapper/220:16:052
3022199934,53cyclictest0-21swapper/220:16:052
30221999335,11cyclictest30877-21grep19:01:152
30220999313,29cyclictest0-21swapper/123:15:491
3022099923,41cyclictest0-21swapper/120:50:551
3022099923,41cyclictest0-21swapper/120:50:551
3022199915,40cyclictest1227-21runrttasks21:18:222
30221999138,11cyclictest21111-21grep19:50:542
3022199905,29cyclictest0-21swapper/221:40:422
3022199905,25cyclictest0-21swapper/222:16:172
3022199905,25cyclictest0-21swapper/222:16:172
30221999021,15cyclictest0-21swapper/221:55:522
3022199894,31cyclictest0-21swapper/220:56:082
3022099894,77cyclictest0-21swapper/122:35:491
3022199884,30cyclictest29669-21ssh20:05:402
3022099883,15cyclictest0-21swapper/119:55:561
3022099874,11cyclictest0-21swapper/121:10:361
30220998739,42cyclictest0-21swapper/122:41:511
30220998736,8cyclictest25367-21proc_pri20:46:101
30220998735,6cyclictest15539-21ssh23:00:001
30220998735,6cyclictest15539-21ssh23:00:001
30220998733,7cyclictest4260-21rm21:04:191
3022099873,35cyclictest0-21swapper/122:25:491
3022099872,37cyclictest384-21taskset20:57:431
30220998719,12cyclictest0-21swapper/123:05:331
3022199865,14cyclictest0-21swapper/222:10:562
3022199855,14cyclictest0-21swapper/222:50:252
3022099854,38cyclictest0-21swapper/119:41:051
3022099853,34cyclictest0-21swapper/120:25:511
3022199845,31cyclictest0-21swapper/219:59:542
3022099844,9cyclictest21762-21taskset23:08:381
30220998431,13cyclictest0-21swapper/121:16:071
3022099843,27cyclictest0-21swapper/121:55:561
3022299833,57cyclictest20618-21proc_pri23:06:023
3022299833,46cyclictest0-21swapper/321:47:153
30222998315,36cyclictest0-21swapper/322:37:173
30220998331,10cyclictest15337-21df_inode21:20:541
3022299824,58cyclictest0-21swapper/323:10:553
3022099824,38cyclictest0-21swapper/120:15:571
3022099824,38cyclictest0-21swapper/120:15:571
3022099824,11cyclictest0-21swapper/122:02:481
3022099823,37cyclictest0-21swapper/120:37:131
3022099823,36cyclictest0-21swapper/119:01:021
30220998227,12cyclictest0-21swapper/120:22:151
3022299813,70cyclictest11369-21munin-node18:21:113
3022299812,33cyclictest107550irq/46-eth020:37:233
30221998121,12cyclictest12274-21rm20:26:062
3022299804,66cyclictest2123-21diskstats21:00:543
3022299804,59cyclictest0-21swapper/323:00:453
3022299804,52cyclictest0-21swapper/320:01:023
30221998022,14cyclictest0-21swapper/219:21:042
3022099803,9cyclictest1124-21snmpd21:41:051
30220998029,13cyclictest0-21swapper/118:45:191
219499800,5rtkit-daemon2193-21rtkit-daemon21:56:453
3022099794,33cyclictest0-21swapper/123:15:321
30220997936,10cyclictest1742-21wc19:10:581
3022299784,53cyclictest0-21swapper/322:45:513
3022299783,68cyclictest22957-21diskmemload22:01:293
30220997827,10cyclictest0-21swapper/122:52:241
3022299773,57cyclictest1124-21snmpd20:16:383
3022299773,57cyclictest1124-21snmpd20:16:383
30220997733,7cyclictest31905-21ssh20:06:551
30220997730,11cyclictest0-21swapper/122:11:031
30220997728,12cyclictest0-21swapper/122:45:441
3022299765,63cyclictest0-21swapper/322:20:193
3022299765,63cyclictest0-21swapper/322:20:193
3022299764,65cyclictest0-21swapper/323:15:423
3022299764,65cyclictest0-21swapper/320:30:403
3022299764,52cyclictest0-21swapper/322:14:283
30222997611,42cyclictest0-21swapper/320:41:093
30221997642,12cyclictest0-21swapper/220:30:522
3022299754,55cyclictest1227-21runrttasks21:42:573
3022299754,54cyclictest0-21swapper/322:30:463
3022299754,52cyclictest0-21swapper/320:00:393
3022299754,51cyclictest0-21swapper/321:27:253
3022299753,63cyclictest16210-21ps21:21:073
30222997521,36cyclictest29083-21unixbench_singl20:51:103
30222997521,36cyclictest29083-21unixbench_singl20:51:103
3022099754,34cyclictest0-21swapper/121:15:371
3022099753,11cyclictest0-21swapper/122:20:321
3022099753,11cyclictest0-21swapper/122:20:321
221652750,5sleep122164-21cat22:20:481
41382740,7sleep10-21swapper/120:15:401
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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