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2026-01-03 - 16:28

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, 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 rackcslot7s.osadl.org (updated Sat Jan 03, 2026 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
41680432990,8sleep3438-20systemd-journal08:20:003
414270228061,13sleep00-21swapper/007:07:260
414289027338,13sleep30-21swapper/307:09:553
414144327347,16sleep10-21swapper/107:05:141
197399730,5rtkit-daemon0-21swapper/008:14:060
197399690,5rtkit-daemon0-21swapper/008:58:180
414282726343,14sleep20-21swapper/207:09:052
197399630,4rtkit-daemon0-21swapper/109:22:180
197399590,8rtkit-daemon1972-21rtkit-daemon12:22:232
197399580,7rtkit-daemon1972-21rtkit-daemon11:33:052
197399570,8rtkit-daemon1972-21rtkit-daemon12:20:343
197399560,9rtkit-daemon1972-21rtkit-daemon11:58:453
197399560,8rtkit-daemon1972-21rtkit-daemon11:09:043
276992550,7sleep14497-21PK-Backend10:50:211
197399550,9rtkit-daemon1972-21rtkit-daemon11:39:113
197399540,9rtkit-daemon1972-21rtkit-daemon12:17:363
197399540,9rtkit-daemon1972-21rtkit-daemon12:17:363
4143041995312,13cyclictest4161522-21grep08:00:153
197399530,8rtkit-daemon1972-21rtkit-daemon12:36:003
197399530,8rtkit-daemon1972-21rtkit-daemon12:36:003
534222520,6chrt0-21swapper/012:00:300
197399520,8rtkit-daemon1972-21rtkit-daemon11:24:563
647852510,6sleep20-21swapper/212:35:092
647852510,6sleep20-21swapper/212:35:092
121422510,5chrt0-21swapper/010:05:290
41658952490,16chrt42-21ksoftirqd/308:10:303
41552152490,6sleep0161rcuc/007:40:290
4143037994821,12cyclictest141rcu_preempt07:41:502
414304199472,30cyclictest42-21ksoftirqd/312:00:243
4143035994722,20cyclictest4155625-21cron07:45:001
379462470,8sleep00-21swapper/011:20:020
41580812460,7sleep14497-21PK-Backend07:50:201
414304199467,17cyclictest4183865-21/usr/sbin/munin09:05:173
4143041994624,8cyclictest42-21ksoftirqd/311:43:223
4143041994622,7cyclictest42-21ksoftirqd/311:34:043
382392460,15chrt34-21ksoftirqd/211:20:122
41512992450,8sleep34497-21PK-Backend07:30:233
4143041994523,8cyclictest42-21ksoftirqd/307:11:013
4143041994522,8cyclictest42-21ksoftirqd/308:57:093
4143041994521,7cyclictest42-21ksoftirqd/308:22:563
4143041994520,9cyclictest42-21ksoftirqd/309:33:283
4143041994520,7cyclictest42-21ksoftirqd/310:05:273
41546602440,5sleep3411rcuc/307:40:203
4143041994423,7cyclictest42-21ksoftirqd/308:44:383
4143041994423,7cyclictest42-21ksoftirqd/307:17:453
4143041994422,7cyclictest42-21ksoftirqd/312:07:333
4143041994422,7cyclictest42-21ksoftirqd/311:00:403
32222440,6chrt0-21swapper/009:40:250
414304199439,19cyclictest42-21ksoftirqd/307:35:293
414304199433,10cyclictest42-21ksoftirqd/311:00:023
4143041994322,7cyclictest42-21ksoftirqd/311:54:213
4143041994322,7cyclictest42-21ksoftirqd/311:54:213
4143041994322,7cyclictest42-21ksoftirqd/309:23:133
4143041994322,7cyclictest42-21ksoftirqd/308:27:323
4143041994322,7cyclictest42-21ksoftirqd/307:26:423
4143041994321,7cyclictest42-21ksoftirqd/310:29:373
4143041994314,10cyclictest42-21ksoftirqd/312:28:383
414303099433,23cyclictest52159-21sh12:00:010
4143030994324,6cyclictest13-21ksoftirqd/010:25:000
197399430,35rtkit-daemon4144746-21munin-node11:48:152
4143041994222,7cyclictest42-21ksoftirqd/311:19:443
4143041994221,7cyclictest42-21ksoftirqd/310:22:173
4143041994212,11cyclictest42-21ksoftirqd/309:11:023
4143037994213,15cyclictest141rcu_preempt11:00:022
4143030994224,14cyclictest13-21ksoftirqd/011:30:010
4143030994224,14cyclictest13-21ksoftirqd/011:30:010
414304199415,18cyclictest42-21ksoftirqd/310:30:153
4143041994121,16cyclictest24724-21sed10:40:283
4143041994115,22cyclictest62834-21cpu12:30:133
4143041994112,11cyclictest42-21ksoftirqd/309:43:063
4143037994119,18cyclictest4177455-21irqstats08:45:202
4143030994123,14cyclictest13-21ksoftirqd/008:35:260
4143030994123,14cyclictest13-21ksoftirqd/007:25:020
4143030994122,14cyclictest13-21ksoftirqd/011:30:030
4143030994115,6cyclictest141rcu_preempt09:35:000
158202410,4sleep10-21swapper/110:15:281
158202410,4sleep10-21swapper/110:15:281
414304199408,17cyclictest42-21ksoftirqd/311:29:513
414304199408,17cyclictest42-21ksoftirqd/311:29:513
414304199406,9cyclictest4497-21PK-Backend12:10:153
4143041994028,9cyclictest42-21ksoftirqd/310:38:483
4143041994011,8cyclictest42-21ksoftirqd/310:50:013
4143041994011,11cyclictest42-21ksoftirqd/307:56:223
4143041994010,11cyclictest42-21ksoftirqd/308:07:243
4143037994014,6cyclictest141rcu_preempt07:15:022
414303599404,6cyclictest141rcu_preempt07:15:011
4143035994022,5cyclictest26-21ksoftirqd/111:09:571
4143035994022,14cyclictest26-21ksoftirqd/108:18:581
4143035994022,13cyclictest438-20systemd-journal11:18:191
4143035994022,13cyclictest26-21ksoftirqd/109:01:071
4143030994022,6cyclictest13-21ksoftirqd/007:30:150
4143030994022,14cyclictest13-21ksoftirqd/007:25:190
4143030994022,13cyclictest13-21ksoftirqd/009:45:140
414303099401,7cyclictest46972-21turbostat11:45:000
643392396,29sleep264604-21cut12:35:022
41562792390,6sleep0161rcuc/007:45:160
414304199399,12cyclictest42-21ksoftirqd/307:45:383
414304199399,11cyclictest42-21ksoftirqd/307:23:413
414304199397,8cyclictest42-21ksoftirqd/309:05:023
414304199396,17cyclictest42-21ksoftirqd/308:50:303
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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