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2026-03-21 - 14:51

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 Sat Mar 21, 2026 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2485991030,3rtkit-daemon30967-21kworker/2:008:56:012
197119910147,13cyclictest0-21swapper/109:12:581
248599790,6rtkit-daemon34-21rcuc/310:47:273
248599740,6rtkit-daemon0-21swapper/309:40:073
248599740,20rtkit-daemon0-21swapper/209:42:523
248599710,8rtkit-daemon0-21swapper/210:37:433
1971399714,58cyclictest0-21swapper/309:17:453
1971299704,58cyclictest0-21swapper/209:52:472
1970999706,58cyclictest0-21swapper/009:12:440
1971399694,55cyclictest0-21swapper/307:52:533
248599680,7rtkit-daemon0-21swapper/210:14:133
1971299685,54cyclictest0-21swapper/207:42:562
248599670,6rtkit-daemon0-21swapper/209:22:533
1971399675,52cyclictest1419-21runrttasks08:32:433
1971399674,55cyclictest0-21swapper/308:26:153
1971299675,53cyclictest0-21swapper/208:37:522
1971299675,53cyclictest0-21swapper/208:37:522
168342670,6sleep016838-21switchtime10:52:570
248599660,7rtkit-daemon0-21swapper/209:15:163
19713996624,12cyclictest1419-21runrttasks06:23:013
1971299664,54cyclictest0-21swapper/210:37:592
1971299664,54cyclictest0-21swapper/208:57:482
248599650,5rtkit-daemon0-21swapper/309:30:083
1971299654,53cyclictest0-21swapper/210:47:482
19709996531,26cyclictest0-21swapper/008:28:050
1971299644,52cyclictest0-21swapper/209:37:442
1971299644,52cyclictest0-21swapper/209:15:282
1971299644,51cyclictest0-21swapper/207:07:472
19709996444,13cyclictest0-21swapper/008:55:090
248599630,7rtkit-daemon12674-21ssh09:59:143
248599630,7rtkit-daemon12674-21ssh09:59:143
248599630,5rtkit-daemon0-21swapper/210:31:433
248599630,4rtkit-daemon3992-21ssh10:34:133
19711996340,15cyclictest0-21swapper/109:02:441
1970999635,52cyclictest27215-21ntp_kernel_pll_09:32:550
1971399625,50cyclictest0-21swapper/305:57:203
1971399625,50cyclictest0-21swapper/305:57:203
1971399625,49cyclictest0-21swapper/309:47:453
19713996212,28cyclictest11988-21unixbench_multi07:33:063
1971299624,50cyclictest0-21swapper/210:17:502
1971299624,50cyclictest0-21swapper/207:52:502
1971199624,51cyclictest0-21swapper/108:33:041
19709996242,13cyclictest0-21swapper/010:29:140
19709996241,14cyclictest27589-21latency07:57:570
19709996241,14cyclictest27589-21latency07:57:570
19709996241,13cyclictest0-21swapper/009:17:410
19709996232,14cyclictest0-21swapper/010:12:220
40122614,49sleep20-21swapper/208:12:262
27342613,50sleep10-21swapper/109:44:501
1971399614,48cyclictest0-21swapper/308:17:483
19713996110,26cyclictest0-21swapper/310:07:323
1971299614,49cyclictest0-21swapper/207:32:512
19711996140,15cyclictest0-21swapper/110:37:461
19709996141,13cyclictest0-21swapper/008:57:440
19709996140,14cyclictest0-21swapper/009:57:490
19709996140,14cyclictest0-21swapper/009:57:490
1970999614,50cyclictest0-21swapper/008:04:100
248599600,7rtkit-daemon0-21swapper/208:42:323
248599600,7rtkit-daemon0-21swapper/207:19:503
248599600,7rtkit-daemon0-21swapper/207:19:503
248599600,7rtkit-daemon0-21swapper/206:51:143
248599600,7rtkit-daemon0-21swapper/206:03:083
1971399604,48cyclictest0-21swapper/310:21:153
1971399603,50cyclictest0-21swapper/307:48:223
19713996014,38cyclictest22641-21munin-node11:02:423
1971299604,49cyclictest0-21swapper/210:07:282
1971299604,49cyclictest0-21swapper/206:08:032
1971299604,48cyclictest12445-21diskmemload10:42:472
1971299604,48cyclictest0-21swapper/210:13:022
1971299604,46cyclictest18511-21yum-updatesd-he09:21:122
19711996042,12cyclictest0-21swapper/110:02:401
19711996040,13cyclictest0-21swapper/109:07:471
19709996042,10cyclictest25001-21rm10:17:490
19709996031,13cyclictest0-21swapper/011:02:590
248599590,7rtkit-daemon0-21swapper/209:00:243
248599590,7rtkit-daemon0-21swapper/208:48:093
248599590,7rtkit-daemon0-21swapper/207:28:123
248599590,7rtkit-daemon0-21swapper/206:28:223
248599590,7rtkit-daemon0-21swapper/206:09:383
248599590,7rtkit-daemon0-21swapper/206:00:463
248599590,7rtkit-daemon0-21swapper/205:40:543
248599590,4rtkit-daemon2484-21rtkit-daemon10:28:281
248599590,4rtkit-daemon2484-21rtkit-daemon10:07:361
1971399599,30cyclictest31031-21memory08:02:563
1971399599,29cyclictest20209-21switchtime10:57:583
1971299594,48cyclictest0-21swapper/210:34:312
1971299594,48cyclictest0-21swapper/208:22:462
1971299594,37cyclictest0-21swapper/205:56:292
1971299594,37cyclictest0-21swapper/205:56:292
1971299593,49cyclictest0-21swapper/209:34:392
19711995940,12cyclictest0-21swapper/109:51:101
19711995940,12cyclictest0-21swapper/107:22:511
19711995939,13cyclictest0-21swapper/106:08:081
1970999594,47cyclictest0-21swapper/007:42:340
1970999593,50cyclictest0-21swapper/010:15:290
1970999593,50cyclictest0-21swapper/009:22:480
248599580,7rtkit-daemon0-21swapper/209:11:313
248599580,7rtkit-daemon0-21swapper/207:14:283
248599580,7rtkit-daemon0-21swapper/207:01:583
248599580,7rtkit-daemon0-21swapper/206:54:293
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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