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2026-06-25 - 06:52

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 Thu Jun 25, 2026 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
359121490,7sleep31095599cyclictest19:34:553
2426621460,4sleep224263-21cat19:10:032
109529910724,13cyclictest1227-21runrttasks21:13:090
10953991064,92cyclictest0-21swapper/121:55:031
10952991024,92cyclictest0-21swapper/023:23:580
109559910044,50cyclictest0-21swapper/321:54:533
10954991004,88cyclictest0-21swapper/221:20:062
10955999943,48cyclictest0-21swapper/322:29:403
1095299999,17cyclictest31207-21kworker/0:221:44:310
1095299999,17cyclictest31207-21kworker/0:221:44:310
10952999916,21cyclictest0-21swapper/022:56:340
1095299985,24cyclictest0-21swapper/021:19:500
1095299974,32cyclictest0-21swapper/022:00:010
10952999640,10cyclictest19832-21cpuspeed_turbos21:54:440
1095399943,74cyclictest0-21swapper/123:09:121
1095399943,74cyclictest0-21swapper/123:09:121
1095299935,15cyclictest0-21swapper/023:31:450
1095599924,35cyclictest0-21swapper/323:39:533
1095599924,29cyclictest0-21swapper/320:55:043
10955999237,46cyclictest18449-21gltestperf22:39:473
10955999214,13cyclictest0-21swapper/321:19:433
1095399924,72cyclictest0-21swapper/122:08:211
1095299924,11cyclictest3041-21df_abs21:29:470
219499910,6rtkit-daemon0-21swapper/122:28:051
219499910,6rtkit-daemon0-21swapper/122:28:051
1095599914,35cyclictest0-21swapper/321:54:303
1095599914,23cyclictest30016-21rm23:44:453
1095599914,23cyclictest30016-21rm23:44:453
1095599914,12cyclictest0-21swapper/321:06:253
10955999138,47cyclictest0-21swapper/321:59:473
10955999124,10cyclictest17154-21aten_r1power_en20:04:463
1095499913,80cyclictest0-21swapper/221:09:362
10952999136,11cyclictest32713-21basename22:14:290
1095599905,24cyclictest25606-21grep21:14:513
1095599904,29cyclictest0-21swapper/323:24:533
1095599904,13cyclictest0-21swapper/321:00:583
1095599903,31cyclictest0-21swapper/323:54:363
10955999027,8cyclictest12530-21latency_hist21:44:313
10955999023,11cyclictest29077-21needreboot19:20:003
10955999013,10cyclictest107550irq/46-eth022:50:163
1095399904,79cyclictest0-21swapper/121:47:591
1095399904,79cyclictest0-21swapper/121:47:591
1095399904,64cyclictest0-21swapper/122:35:011
1095399903,80cyclictest0-21swapper/100:06:421
1095599895,77cyclictest0-21swapper/318:54:373
1095599895,23cyclictest0-21swapper/322:59:593
1095599894,12cyclictest0-21swapper/320:53:593
10955998926,11cyclictest1227-21runrttasks19:29:483
10955998926,10cyclictest10662-21unixbench_multi23:15:003
10955998913,10cyclictest107550irq/46-eth022:24:293
1095499893,76cyclictest19209-21proc_pri21:04:592
1095399894,78cyclictest0-21swapper/121:06:011
1095399893,70cyclictest0-21swapper/120:04:341
1095599888,13cyclictest0-21swapper/318:59:373
1095599888,13cyclictest0-21swapper/318:59:373
1095599884,36cyclictest0-21swapper/322:44:483
1095599884,34cyclictest0-21swapper/321:44:593
1095599884,34cyclictest0-21swapper/321:44:593
1095599884,27cyclictest0-21swapper/322:27:533
1095599884,27cyclictest0-21swapper/322:27:533
10955998817,13cyclictest0-21swapper/323:34:263
1095499884,77cyclictest0-21swapper/220:59:492
1095499883,78cyclictest10176-21netstat23:14:532
1095399885,75cyclictest0-21swapper/121:19:351
1095399885,75cyclictest0-21swapper/120:53:101
1095399885,64cyclictest0-21swapper/121:30:511
1095399885,63cyclictest0-21swapper/121:14:551
1095399884,65cyclictest0-21swapper/119:15:071
1095399884,64cyclictest0-21swapper/121:49:491
1095399884,56cyclictest0-21swapper/122:23:541
1095399883,79cyclictest0-21swapper/123:23:381
219499870,5rtkit-daemon2193-21rtkit-daemon23:11:561
1095599875,32cyclictest0-21swapper/323:35:513
1095599875,28cyclictest0-21swapper/319:25:053
1095599874,36cyclictest0-21swapper/323:49:393
1095599874,31cyclictest0-21swapper/322:56:583
1095599874,21cyclictest0-21swapper/321:09:513
1095599874,14cyclictest0-21swapper/322:38:283
10955998724,14cyclictest0-21swapper/300:05:303
10955998720,11cyclictest0-21swapper/319:49:483
1095499874,75cyclictest1227-21runrttasks22:26:322
1095499874,75cyclictest1227-21runrttasks22:26:322
1095499873,77cyclictest0-21swapper/222:58:292
1095499873,75cyclictest0-21swapper/222:33:002
1095499873,75cyclictest0-21swapper/222:12:372
1095399875,75cyclictest0-21swapper/123:02:401
1095399874,76cyclictest0-21swapper/120:54:531
1095399874,76cyclictest0-21swapper/118:54:461
1095399874,76cyclictest0-21swapper/118:54:461
1095399874,75cyclictest27325-21fschecks_count20:24:511
1095399874,75cyclictest27325-21fschecks_count20:24:511
1095399873,64cyclictest1124-21snmpd23:52:091
1095599864,35cyclictest0-21swapper/320:44:463
1095599864,34cyclictest0-21swapper/320:29:523
1095599864,12cyclictest0-21swapper/323:09:493
10955998625,10cyclictest13137-21gltestperf19:54:543
10955998622,12cyclictest107550irq/46-eth022:19:293
10955998614,8cyclictest0-21swapper/322:06:363
10955998614,13cyclictest0-21swapper/321:34:103
10955998610,17cyclictest0-21swapper/321:24:333
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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