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2026-01-11 - 10:40

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #7

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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Click here to display the system's profile data or here to proceed to next system.
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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack7slot7s.osadl.org (updated Sun Jan 11, 2026 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1059429775,6sleep00-21swapper/019:06:540
1059429775,6sleep00-21swapper/019:06:540
1071729480,9sleep20-21swapper/219:08:292
1071729480,9sleep20-21swapper/219:08:292
874729372,15sleep10-21swapper/119:05:141
874729372,15sleep10-21swapper/119:05:141
1063428269,9sleep30-21swapper/319:07:253
1063428269,9sleep30-21swapper/319:07:243
1092899380,19cyclictest0-21swapper/319:30:143
1092899310,30cyclictest0-21swapper/300:05:143
1092899292,23cyclictest3730-21diskmemload21:34:143
1092899280,26cyclictest0-21swapper/323:00:193
1092899280,23cyclictest0-21swapper/321:40:193
1092899270,24cyclictest3730-21diskmemload23:28:303
10923992725,1cyclictest0-21swapper/123:40:191
1092899260,25cyclictest0-21swapper/322:59:143
1092899260,23cyclictest3730-21diskmemload21:48:553
1092899260,1cyclictest0-21swapper/322:07:213
10919992625,1cyclictest0-21swapper/022:06:430
1092899252,20cyclictest0-21swapper/323:45:123
1092899251,23cyclictest3730-21diskmemload00:27:253
1092899250,22cyclictest0-21swapper/322:55:013
1092899250,22cyclictest0-21swapper/322:55:013
1092899250,20cyclictest0-21swapper/322:25:143
1092899250,0cyclictest0-21swapper/321:57:043
1092899242,21cyclictest3730-21diskmemload23:55:183
1092899242,19cyclictest3730-21diskmemload23:34:093
1092899242,16cyclictest3730-21diskmemload00:00:393
1092899241,19cyclictest24584-21grep19:35:203
1092899240,23cyclictest0-21swapper/323:44:403
1092899240,21cyclictest0-21swapper/323:11:163
1092899240,20cyclictest0-21swapper/323:39:473
1092899232,20cyclictest3730-21diskmemload00:36:463
1092899232,18cyclictest3730-21diskmemload00:23:053
1092899231,21cyclictest3730-21diskmemload22:13:243
1092899231,21cyclictest3730-21diskmemload21:11:123
1092899231,18cyclictest0-21swapper/320:20:143
1092899230,22cyclictest3730-21diskmemload22:15:083
1092899230,21cyclictest3730-21diskmemload22:00:383
1092899230,1cyclictest0-21swapper/322:40:153
1092899230,1cyclictest0-21swapper/321:24:213
1092899230,1cyclictest0-21swapper/300:34:433
10925992321,1cyclictest10793-21apt-get00:05:142
1092399230,23cyclictest0-21swapper/122:49:521
1092399230,22cyclictest0-21swapper/122:41:551
10919992322,1cyclictest0-21swapper/022:16:240
1092899222,20cyclictest3730-21diskmemload21:53:463
1092899220,21cyclictest19294-21ssh00:10:103
1092899220,1cyclictest0-21swapper/323:22:053
1092899220,0cyclictest0-21swapper/300:16:423
1092399220,0cyclictest0-21swapper/122:39:571
1092399220,0cyclictest0-21swapper/100:05:341
1092899212,19cyclictest3730-21diskmemload21:16:173
1092899212,12cyclictest21785-21apache219:20:013
1092899211,1cyclictest0-21swapper/322:30:023
1092899210,1cyclictest0-21swapper/323:50:133
1092899210,1cyclictest0-21swapper/322:23:023
1091999210,20cyclictest0-21swapper/000:03:000
82662200,3sleep013-21ksoftirqd/023:05:350
1092899202,17cyclictest3730-21diskmemload22:45:273
1092899201,18cyclictest3730-21diskmemload22:39:143
1092899200,20cyclictest0-21swapper/321:35:523
1092899200,1cyclictest0-21swapper/321:28:493
1092899200,18cyclictest0-21swapper/323:19:133
10923992018,1cyclictest0-21swapper/123:03:541
1091999207,6cyclictest5791-21idleruntime-cro21:30:000
1092899198,8cyclictest32315-21taskset19:51:453
1092899191,17cyclictest0-21swapper/320:35:123
1092899190,1cyclictest0-21swapper/321:00:213
1092899190,1cyclictest0-21swapper/321:00:203
1092899190,18cyclictest0-21swapper/323:05:143
1092899190,16cyclictest0-21swapper/320:15:223
1092399190,1cyclictest0-21swapper/123:58:381
1091999190,4cyclictest0-21swapper/022:02:340
1092599180,17cyclictest0-21swapper/219:50:122
1092399180,1cyclictest0-21swapper/123:14:471
1091999180,2cyclictest0-21swapper/021:35:470
1091999180,1cyclictest141rcu_preempt22:10:240
10928991713,4cyclictest0-21swapper/319:10:133
1092399171,1cyclictest10913-21cyclictest23:21:521
1092399171,14cyclictest0-21swapper/123:39:001
1092399170,1cyclictest0-21swapper/123:48:271
1092399170,1cyclictest0-21swapper/100:03:031
1092899163,12cyclictest24245-21cron20:45:003
1092899160,15cyclictest28123-21cut19:45:133
1092899160,14cyclictest0-21swapper/321:05:143
1092899160,14cyclictest0-21swapper/319:25:173
1092899160,13cyclictest0-21swapper/320:00:233
10925991615,1cyclictest32-21ksoftirqd/223:19:492
10925991615,1cyclictest0-21swapper/222:05:262
10923991614,1cyclictest38150irq/131-snd_hda00:35:131
1092399160,1cyclictest0-21swapper/123:29:541
1092399160,1cyclictest0-21swapper/100:34:521
1091999160,1cyclictest0-21swapper/023:14:170
10925991515,0cyclictest0-21swapper/200:37:422
1092399150,1cyclictest0-21swapper/121:25:131
1092399150,0cyclictest0-21swapper/122:21:421
1092899149,4cyclictest15009-21grep20:25:143
1092899148,5cyclictest9360-21wc20:10:283
1092899147,6cyclictest18355-21date19:25:003
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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