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2026-03-06 - 17:50

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 Fri Mar 06, 2026 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
115649911338,13cyclictest0-21swapper/207:21:592
11564991036,12cyclictest7880-21unixbench_singl08:42:102
11559999725,55cyclictest0-21swapper/010:31:450
11559999723,9cyclictest7073-21crond09:31:340
1155999964,28cyclictest0-21swapper/010:36:460
1155999964,27cyclictest0-21swapper/009:01:510
1155999963,26cyclictest12553-21fschecks_time05:52:020
11565999531,13cyclictest0-21swapper/309:40:203
11565999531,13cyclictest0-21swapper/309:40:203
1155999954,28cyclictest0-21swapper/005:57:160
1155999954,27cyclictest0-21swapper/008:15:140
1155999954,27cyclictest0-21swapper/008:15:140
1155999954,27cyclictest0-21swapper/008:03:250
1155999954,26cyclictest0-21swapper/007:47:000
1155999954,12cyclictest0-21swapper/009:56:030
11559999520,12cyclictest0-21swapper/008:31:390
11559999419,13cyclictest0-21swapper/007:56:580
1155999924,27cyclictest0-21swapper/010:43:460
11559999223,51cyclictest0-21swapper/009:41:490
11559999220,12cyclictest0-21swapper/009:36:490
11559999220,12cyclictest0-21swapper/009:36:490
1155999916,14cyclictest0-21swapper/010:13:300
1155999915,26cyclictest0-21swapper/008:07:030
1155999914,27cyclictest0-21swapper/007:37:230
11559999119,12cyclictest0-21swapper/010:02:350
11559999119,12cyclictest0-21swapper/008:36:500
11559999118,11cyclictest5030-21unixbench_multi11:02:040
11559999118,11cyclictest5030-21unixbench_multi11:02:040
1156599903,12cyclictest0-21swapper/310:16:583
1156599903,12cyclictest0-21swapper/310:16:583
1155999906,13cyclictest0-21swapper/010:21:560
1155999904,28cyclictest0-21swapper/010:46:480
1155999904,27cyclictest0-21swapper/010:16:520
1155999904,27cyclictest0-21swapper/010:16:520
1155999904,26cyclictest0-21swapper/008:49:560
1155999895,25cyclictest0-21swapper/008:45:110
1155999894,28cyclictest0-21swapper/009:10:040
1155999894,27cyclictest0-21swapper/009:11:500
1155999894,26cyclictest0-21swapper/009:56:580
1155999893,27cyclictest0-21swapper/006:36:420
1155999884,27cyclictest0-21swapper/010:27:570
1155999884,23cyclictest0-21swapper/008:53:110
11559998821,13cyclictest0-21swapper/009:21:460
11559998819,14cyclictest0-21swapper/007:21:560
11559998817,11cyclictest0-21swapper/006:51:520
11559998817,11cyclictest0-21swapper/006:51:520
248599870,5rtkit-daemon2484-21rtkit-daemon10:24:283
1155999875,26cyclictest0-21swapper/011:01:180
1155999874,25cyclictest0-21swapper/008:24:570
1155999874,23cyclictest0-21swapper/010:51:490
11559998720,13cyclictest0-21swapper/009:31:490
1155999863,28cyclictest7929-21ssh11:06:590
1155999863,26cyclictest0-21swapper/009:50:450
1155999863,24cyclictest21531-21munin-node08:16:530
1155999854,73cyclictest0-21swapper/007:05:460
1155999854,25cyclictest0-21swapper/008:59:470
1155999854,14cyclictest0-21swapper/008:33:480
1155999853,73cyclictest0-21swapper/007:55:320
1155999853,12cyclictest0-21swapper/011:16:420
1155999844,15cyclictest0-21swapper/011:12:340
1155999844,12cyclictest0-21swapper/009:17:250
11559998422,13cyclictest0-21swapper/010:06:570
248599830,4rtkit-daemon2484-21rtkit-daemon11:09:193
248599830,4rtkit-daemon2484-21rtkit-daemon05:53:543
1155999833,24cyclictest0-21swapper/006:22:020
248599820,6rtkit-daemon2484-21rtkit-daemon08:56:393
248599820,4rtkit-daemon2484-21rtkit-daemon10:32:062
1155999823,21cyclictest21425-21head06:11:550
1155999823,20cyclictest27248-21munin-node07:32:000
1155999823,10cyclictest19282-21cpuspeed_turbos06:06:560
1155999823,10cyclictest19282-21cpuspeed_turbos06:06:560
11559998219,10cyclictest1052-21rsyslogd06:51:410
1155999817,11cyclictest17846-21aten_r1power_vo07:11:540
1155999814,32cyclictest0-21swapper/006:36:590
1155999814,24cyclictest0-21swapper/006:59:490
1155999794,68cyclictest0-21swapper/007:07:010
1155999794,25cyclictest0-21swapper/007:20:490
1155999794,14cyclictest0-21swapper/006:16:540
1155999774,15cyclictest0-21swapper/007:42:000
1155999774,14cyclictest0-21swapper/006:26:530
248599760,6rtkit-daemon2484-21rtkit-daemon09:02:323
1155999753,15cyclictest0-21swapper/006:02:140
248599740,4rtkit-daemon2484-21rtkit-daemon08:55:543
1155999743,22cyclictest0-21swapper/006:42:150
248599730,4rtkit-daemon2484-21rtkit-daemon10:32:213
248599720,4rtkit-daemon2484-21rtkit-daemon09:10:463
1013827112,49sleep20-21swapper/205:47:092
248599680,5rtkit-daemon2484-21rtkit-daemon10:05:441
248599670,5rtkit-daemon2484-21rtkit-daemon08:08:041
248599670,5rtkit-daemon2484-21rtkit-daemon07:57:271
1155999673,30cyclictest0-21swapper/007:30:110
248599660,5rtkit-daemon2484-21rtkit-daemon09:39:151
248599660,5rtkit-daemon2484-21rtkit-daemon09:39:151
248599660,5rtkit-daemon2484-21rtkit-daemon09:01:171
248599660,5rtkit-daemon2484-21rtkit-daemon05:55:091
248599650,5rtkit-daemon2484-21rtkit-daemon10:24:581
248599650,4rtkit-daemon2484-21rtkit-daemon10:33:351
248599650,4rtkit-daemon2484-21rtkit-daemon09:34:531
248599650,4rtkit-daemon2484-21rtkit-daemon09:11:391
248599650,4rtkit-daemon2484-21rtkit-daemon07:43:051
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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