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2026-06-22 - 00:22

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 Jun 21, 2026 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
120932870,6sleep31612599cyclictest12:02:563
30092760,3sleep041ktimersoftd/011:48:100
1612499714,59cyclictest0-21swapper/209:33:082
1612499714,59cyclictest0-21swapper/209:33:082
16123996941,11cyclictest14908-21crond12:07:421
16122996636,13cyclictest0-21swapper/010:42:450
219499650,5rtkit-daemon2193-21rtkit-daemon09:53:262
1612499653,54cyclictest22620-21systemd-cgroups09:07:502
16123996537,13cyclictest0-21swapper/110:58:161
16123996537,13cyclictest0-21swapper/110:58:161
199082640,3sleep015-21rcuc/006:53:200
1612499644,51cyclictest0-21swapper/209:13:092
1612499643,53cyclictest0-21swapper/209:58:192
16123996440,11cyclictest0-21swapper/110:48:361
219499630,5rtkit-daemon2193-21rtkit-daemon11:50:442
1612599634,13cyclictest0-21swapper/310:26:193
1612499634,51cyclictest0-21swapper/209:23:122
1612499633,53cyclictest0-21swapper/210:48:052
16122996324,24cyclictest3990-21unixbench_multi10:13:200
29692623,9sleep00-21swapper/011:01:140
29692623,9sleep00-21swapper/011:01:140
1612599624,11cyclictest21980-21wc09:53:083
1612499624,51cyclictest0-21swapper/211:38:022
1612499624,51cyclictest0-21swapper/211:38:022
1612499624,50cyclictest0-21swapper/210:18:132
1612499624,50cyclictest0-21swapper/210:18:132
1612499624,50cyclictest0-21swapper/210:08:072
1612499624,50cyclictest0-21swapper/209:08:242
1612499622,54cyclictest0-21swapper/210:23:522
67902613,9sleep36930-21latency_hist11:07:463
1612499614,49cyclictest0-21swapper/211:18:132
1612499613,52cyclictest0-21swapper/209:48:372
1612499613,51cyclictest0-21swapper/210:46:522
16122996112,29cyclictest0-21swapper/009:03:090
1612599605,49cyclictest0-21swapper/311:22:443
1612499604,49cyclictest0-21swapper/210:15:002
1612499603,52cyclictest0-21swapper/209:28:532
16123996036,10cyclictest0-21swapper/108:48:231
16123996032,13cyclictest0-21swapper/110:08:001
302692593,48sleep230287-21uname10:53:092
264032593,9sleep00-21swapper/011:35:330
1612599599,29cyclictest0-21swapper/312:13:013
1612499595,48cyclictest0-21swapper/211:36:522
1612499595,46cyclictest0-21swapper/211:52:572
1612499594,47cyclictest0-21swapper/211:22:532
1612499593,49cyclictest0-21swapper/212:02:542
1612499592,51cyclictest0-21swapper/208:48:062
16123995926,12cyclictest0-21swapper/112:13:041
93552584,12sleep00-21swapper/007:38:240
1612499584,47cyclictest0-21swapper/211:05:052
1612499584,47cyclictest0-21swapper/210:33:142
1612499584,47cyclictest0-21swapper/208:55:462
1612499584,47cyclictest0-21swapper/208:55:462
16124995832,8cyclictest1571-21ssh10:58:142
16124995832,8cyclictest1571-21ssh10:58:142
1612499583,50cyclictest0-21swapper/209:47:292
1612499583,48cyclictest30907-21cpuspeed11:42:572
1612499583,48cyclictest0-21swapper/211:08:012
1612399584,32cyclictest0-21swapper/107:18:151
16123995832,12cyclictest0-21swapper/108:58:291
16123995832,12cyclictest0-21swapper/108:58:291
16123995825,16cyclictest29202-21processes10:03:151
1612299584,34cyclictest0-21swapper/010:43:190
16122995819,21cyclictest0-21swapper/008:59:350
16122995819,21cyclictest0-21swapper/008:59:350
93722573,10sleep19446-21switchtime07:38:251
171622573,9sleep00-21swapper/011:22:510
1612599575,35cyclictest0-21swapper/310:03:383
1612599574,12cyclictest0-21swapper/310:47:463
1612599574,12cyclictest0-21swapper/310:37:453
1612599573,13cyclictest0-21swapper/310:18:213
1612599573,13cyclictest0-21swapper/310:18:213
1612499574,46cyclictest0-21swapper/211:58:062
16123995736,8cyclictest15795-21sensors09:43:211
16123995735,8cyclictest3654-21yum-updatesd-he09:27:141
16123995729,12cyclictest0-21swapper/111:13:071
16123995728,14cyclictest0-21swapper/110:54:501
16123995711,11cyclictest0-21swapper/109:15:071
1612299575,16cyclictest0-21swapper/011:32:150
16122995737,11cyclictest14475-21unixbench_singl07:48:250
77462563,47sleep00-21swapper/010:19:170
77462563,47sleep00-21swapper/010:19:170
32712562,9sleep30-21swapper/311:02:213
32712562,9sleep30-21swapper/311:02:213
276212563,47sleep00-21swapper/010:48:200
219499560,6rtkit-daemon2193-21rtkit-daemon10:28:172
1612599566,10cyclictest0-21swapper/309:38:153
1612599566,10cyclictest0-21swapper/309:38:153
1612599564,13cyclictest0-21swapper/310:39:253
1612599564,13cyclictest0-21swapper/310:10:193
1612599564,13cyclictest0-21swapper/309:00:433
1612599564,13cyclictest0-21swapper/309:00:433
1612599564,13cyclictest0-21swapper/308:51:033
1612599563,13cyclictest0-21swapper/311:27:073
16125995614,25cyclictest0-21swapper/311:15:293
1612599560,10cyclictest32322-21kworker/0:210:57:453
1612499563,46cyclictest1080-21lldpd09:19:202
1612499562,49cyclictest0-21swapper/212:13:082
16123995630,12cyclictest0-21swapper/109:50:111
1612399563,25cyclictest0-21swapper/111:34:571
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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