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2026-08-18 - 06:11

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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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 Tue Aug 18, 2026 00:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
940999943,12cyclictest0-21swapper/022:02:010
9409999329,11cyclictest1227-21runrttasks20:59:150
940999923,50cyclictest17700-21unixbench-2d20:14:190
940999904,43cyclictest0-21swapper/022:14:000
940999894,45cyclictest0-21swapper/022:58:540
940999864,21cyclictest0-21swapper/017:59:140
940999864,21cyclictest0-21swapper/017:59:140
297242720,6sleep20-21swapper/222:59:132
941199684,55cyclictest0-21swapper/218:54:082
941199665,52cyclictest0-21swapper/223:09:142
9410996537,9cyclictest5856-21cat18:53:501
941199643,46cyclictest0-21swapper/219:59:112
941199643,46cyclictest0-21swapper/219:59:112
59012644,13sleep30-21swapper/319:59:023
59012644,13sleep30-21swapper/319:59:023
941299634,43cyclictest0-21swapper/322:06:103
941299634,43cyclictest0-21swapper/322:06:103
9412996323,26cyclictest8827-21fschecks_count22:28:583
941199634,51cyclictest0-21swapper/221:06:582
940999633,54cyclictest0-21swapper/021:24:050
940999633,54cyclictest0-21swapper/021:24:050
940999633,53cyclictest0-21swapper/021:48:190
9410996226,13cyclictest0-21swapper/120:29:051
9410996219,23cyclictest0-21swapper/120:19:061
219499620,4rtkit-daemon0-21swapper/222:27:443
941299615,48cyclictest0-21swapper/322:19:153
941199614,49cyclictest0-21swapper/222:49:032
941199614,12cyclictest0-21swapper/222:03:592
941199614,12cyclictest0-21swapper/222:03:592
941199613,8cyclictest1227-21runrttasks23:21:402
941199613,50cyclictest28993-21timerwakeupswit22:09:152
941199613,12cyclictest0-21swapper/221:44:142
941099616,14cyclictest0-21swapper/120:09:151
941199604,11cyclictest0-21swapper/220:48:572
9410996024,16cyclictest0-21swapper/122:43:401
941299593,11cyclictest21618-21gltestperf21:59:003
9412995918,25cyclictest1227-21runrttasks22:55:553
9412995912,12cyclictest0-21swapper/320:23:433
941199594,11cyclictest0-21swapper/222:23:562
941199594,11cyclictest0-21swapper/222:19:162
941199594,11cyclictest0-21swapper/219:53:572
9411995910,43cyclictest0-21swapper/221:29:482
941099596,15cyclictest0-21swapper/118:44:011
9410995939,14cyclictest0-21swapper/123:07:081
940999594,49cyclictest0-21swapper/020:31:250
940999594,46cyclictest0-21swapper/022:49:160
9409995921,31cyclictest15295-21df_abs22:38:570
227932593,49sleep10-21swapper/119:29:011
941299587,14cyclictest0-21swapper/320:39:163
941299587,14cyclictest0-21swapper/320:39:163
941299586,13cyclictest15036-21python20:59:143
941299585,34cyclictest0-21swapper/321:58:123
941299585,14cyclictest0-21swapper/322:16:223
941299585,13cyclictest0-21swapper/318:39:223
941299585,13cyclictest0-21swapper/318:39:223
941199583,7cyclictest1818-21ssh20:39:202
941199583,7cyclictest1818-21ssh20:39:202
941199583,49cyclictest0-21swapper/220:16:102
941199583,29cyclictest30266-21tr21:23:582
941199583,29cyclictest30266-21tr21:23:582
9411995812,26cyclictest0-21swapper/220:27:072
9410995840,12cyclictest0-21swapper/120:48:451
9410995840,12cyclictest0-21swapper/120:48:451
941099584,39cyclictest0-21swapper/122:16:581
9410995820,13cyclictest16823-21munin-node21:04:201
138482583,9sleep22207-21metacity17:59:492
138482583,9sleep22207-21metacity17:59:492
941299574,23cyclictest0-21swapper/320:10:283
941299574,14cyclictest0-21swapper/323:13:533
941299574,13cyclictest0-21swapper/322:58:573
941199573,47cyclictest0-21swapper/223:06:252
9411995729,11cyclictest1124-21snmpd19:35:222
9411995723,13cyclictest0-21swapper/221:58:412
9410995740,12cyclictest0-21swapper/122:04:201
9410995740,12cyclictest0-21swapper/122:04:201
9410995739,12cyclictest0-21swapper/121:33:441
9410995739,11cyclictest0-21swapper/121:59:021
9410995738,13cyclictest2436-21head22:19:011
64052573,46sleep10-21swapper/123:14:001
231312574,13sleep20-21swapper/222:01:252
146232573,12sleep20-21swapper/220:09:582
941299565,31cyclictest0-21swapper/319:32:263
941299564,13cyclictest0-21swapper/322:12:393
941299563,37cyclictest0-21swapper/320:44:563
941299563,37cyclictest0-21swapper/320:44:563
9412995621,14cyclictest0-21swapper/321:28:253
9412995621,14cyclictest0-21swapper/321:28:253
941199564,46cyclictest1227-21runrttasks21:00:222
941199564,46cyclictest0-21swapper/221:12:022
941199564,44cyclictest0-21swapper/220:03:592
941199563,11cyclictest0-21swapper/222:15:402
9410995640,10cyclictest0-21swapper/121:47:271
9410995629,12cyclictest2163-21aten2.4-expect23:08:531
9410995625,13cyclictest0-21swapper/120:08:311
9410995625,13cyclictest0-21swapper/119:59:021
9410995625,13cyclictest0-21swapper/119:59:021
9410995624,12cyclictest20984-21gltestperf21:09:051
9410995623,14cyclictest0-21swapper/123:21:201
9410995619,13cyclictest0-21swapper/122:44:511
9410995619,13cyclictest0-21swapper/122:44:511
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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