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2026-06-17 - 21:49

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 Wed Jun 17, 2026 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2194991130,8rtkit-daemon0-21swapper/110:21:322
11124991004,45cyclictest0-21swapper/009:52:040
1113099924,10cyclictest28956-21crond08:36:363
1113099914,13cyclictest0-21swapper/309:31:353
1113099913,10cyclictest1124-21snmpd10:35:443
11130999110,63cyclictest0-21swapper/309:47:323
1113099908,58cyclictest0-21swapper/310:52:053
1113099895,66cyclictest0-21swapper/308:57:543
1113099894,66cyclictest0-21swapper/310:01:533
1113099894,66cyclictest0-21swapper/310:01:533
1113099888,57cyclictest0-21swapper/311:06:343
1113099884,12cyclictest0-21swapper/309:43:043
1113099883,8cyclictest26586-21taskset10:59:103
1113099883,8cyclictest1227-21runrttasks09:04:123
1113099879,64cyclictest0-21swapper/309:52:153
1113099874,9cyclictest30301-21gltestperf10:16:543
1113099874,61cyclictest0-21swapper/311:18:053
1113099874,13cyclictest0-21swapper/308:51:533
1113099874,12cyclictest0-21swapper/311:42:013
1113099874,12cyclictest0-21swapper/309:22:503
1113099874,12cyclictest0-21swapper/309:22:503
1113099865,73cyclictest0-21swapper/310:30:403
1113099865,59cyclictest0-21swapper/311:27:063
1113099864,71cyclictest0-21swapper/311:56:133
1113099864,61cyclictest0-21swapper/312:03:173
1113099864,58cyclictest0-21swapper/312:11:383
1113099864,58cyclictest0-21swapper/312:11:383
1113099864,14cyclictest0-21swapper/312:11:283
1113099864,14cyclictest0-21swapper/312:11:283
1113099864,12cyclictest0-21swapper/309:31:443
1113099863,61cyclictest3856-21diskmemload12:01:173
1113099863,10cyclictest1872-21head11:11:413
219499850,4rtkit-daemon2193-21rtkit-daemon10:19:100
1113099859,54cyclictest16626-21fschecks_count09:56:503
1113099858,62cyclictest0-21swapper/309:09:073
1113099854,65cyclictest0-21swapper/311:46:443
1113099854,59cyclictest0-21swapper/310:40:483
1113099854,58cyclictest0-21swapper/307:56:013
1113099854,57cyclictest0-21swapper/308:36:483
1113099854,12cyclictest0-21swapper/308:01:533
1113099854,12cyclictest0-21swapper/308:01:533
11130998511,52cyclictest107550irq/46-eth012:19:483
1113099846,55cyclictest0-21swapper/311:04:173
1113099846,52cyclictest0-21swapper/311:37:223
1113099844,58cyclictest0-21swapper/310:09:033
1113099844,58cyclictest0-21swapper/309:39:083
1113099844,12cyclictest0-21swapper/309:16:163
1113099843,64cyclictest0-21swapper/309:20:553
1113099843,61cyclictest14156-21ssh10:41:463
1113099843,59cyclictest1124-21snmpd10:47:583
1113099843,59cyclictest1124-21snmpd10:47:583
96222830,6sleep19623-21expr11:21:491
219499830,5rtkit-daemon2193-21rtkit-daemon11:23:150
1113099834,9cyclictest26974-21hddtemp_smartct10:11:523
1113099834,12cyclictest0-21swapper/311:31:543
1113099834,12cyclictest0-21swapper/311:31:543
1113099834,12cyclictest0-21swapper/308:26:503
1113099833,11cyclictest0-21swapper/311:21:503
11130998319,41cyclictest23407-21processes08:22:063
219499820,5rtkit-daemon2193-21rtkit-daemon10:10:402
1113099825,9cyclictest3864-21munin-run08:51:363
1113099824,12cyclictest0-21swapper/307:58:533
1113099824,12cyclictest0-21swapper/307:58:533
1113099824,12cyclictest0-21swapper/307:05:523
1113099824,12cyclictest0-21swapper/306:51:553
1113099824,10cyclictest0-21swapper/310:22:023
219499810,4rtkit-daemon2193-21rtkit-daemon08:22:072
1113099814,58cyclictest0-21swapper/307:36:573
1113099814,12cyclictest0-21swapper/307:31:393
1113099813,55cyclictest14883-21munin-node08:06:523
11130998111,55cyclictest0-21swapper/308:16:483
1113099804,53cyclictest0-21swapper/307:35:573
1113099803,12cyclictest0-21swapper/307:11:523
11130998010,47cyclictest107550irq/46-eth007:41:503
219499790,5rtkit-daemon2193-21rtkit-daemon09:47:492
1113099794,60cyclictest0-21swapper/307:46:523
1113099794,52cyclictest0-21swapper/306:56:523
1113099783,12cyclictest0-21swapper/308:12:113
1113099774,57cyclictest0-21swapper/307:25:113
1113099773,55cyclictest0-21swapper/307:06:513
1113099764,14cyclictest0-21swapper/307:16:533
1112999734,48cyclictest0-21swapper/212:16:572
98682727,12sleep10-21swapper/106:47:071
1113099723,7cyclictest818-21unixbench_multi08:42:103
219499710,5rtkit-daemon2193-21rtkit-daemon08:12:072
1113099713,8cyclictest11295-21latency_hist06:51:413
219499700,6rtkit-daemon2193-21rtkit-daemon10:41:472
219499690,6rtkit-daemon0-21swapper/111:31:450
219499690,6rtkit-daemon0-21swapper/111:31:450
219499690,5rtkit-daemon2193-21rtkit-daemon11:51:592
219499680,6rtkit-daemon2193-21rtkit-daemon11:22:302
219499680,6rtkit-daemon2193-21rtkit-daemon07:12:172
219499680,6rtkit-daemon0-21swapper/111:36:520
219499680,5rtkit-daemon2193-21rtkit-daemon10:22:022
219499680,12rtkit-daemon2193-21rtkit-daemon11:42:592
219499670,5rtkit-daemon2193-21rtkit-daemon10:56:162
219499670,5rtkit-daemon2193-21rtkit-daemon10:35:542
219499670,4rtkit-daemon2193-21rtkit-daemon06:52:562
1112999674,56cyclictest0-21swapper/209:56:332
219499660,7rtkit-daemon2193-21rtkit-daemon10:06:182
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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