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2026-08-22 - 08:59

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 50 highest latencies:
System rack7slot7s.osadl.org (updated Sat Aug 22, 2026 00:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3099321160,0sleep30-21swapper/321:51:413
3192429685,6sleep00-21swapper/019:08:110
3189929669,8sleep20-21swapper/219:07:532
3201529267,9sleep30-21swapper/319:09:223
2997629171,14sleep10-21swapper/119:05:151
59262720,0sleep10-21swapper/123:52:251
255122660,0sleep20-21swapper/222:07:542
3215399250,2cyclictest0-21swapper/121:26:511
3215399250,25cyclictest0-21swapper/100:04:471
3215699221,3cyclictest141rcu_preempt22:15:262
3216099213,18cyclictest24955-21diskmemload23:22:373
3215399200,20cyclictest24955-21diskmemload23:39:021
3215399200,1cyclictest0-21swapper/121:53:291
3216099194,5cyclictest0-21swapper/321:39:453
32156991916,1cyclictest32-21ksoftirqd/222:55:162
32156991916,1cyclictest32-21ksoftirqd/222:55:152
32156991914,1cyclictest32-21ksoftirqd/222:41:422
3215399192,11cyclictest11751-21apt-get22:00:131
3216099185,3cyclictest0-21swapper/322:30:123
3216099181,4cyclictest0-21swapper/300:35:143
3215699181,0cyclictest141rcu_preempt23:14:102
32153991817,1cyclictest0-21swapper/100:30:171
32153991815,2cyclictest0-21swapper/120:15:181
3215399180,5cyclictest0-21swapper/121:37:091
3215399180,3cyclictest141rcu_preempt19:25:141
3215399180,0cyclictest141rcu_preempt23:08:261
3215399180,0cyclictest141rcu_preempt00:27:151
3215099188,5cyclictest19633-21perf22:05:000
32160991715,1cyclictest39-21ksoftirqd/300:06:233
32156991712,2cyclictest32-21ksoftirqd/222:36:102
3215699171,12cyclictest24955-21diskmemload00:35:152
3215399174,1cyclictest25-21ksoftirqd/122:46:471
3215399170,0cyclictest0-21swapper/122:39:141
3216099162,11cyclictest0-21swapper/323:00:193
32160991613,3cyclictest55750irq/128-enp2s0-22:27:043
3216099161,2cyclictest141rcu_preempt21:22:063
3216099160,0cyclictest0-21swapper/319:35:123
3215699165,9cyclictest32-21ksoftirqd/220:40:172
3215699163,12cyclictest20895-21unixbench_multi21:45:252
3215699161,5cyclictest141rcu_preempt00:15:142
32156991614,2cyclictest32-21ksoftirqd/221:52:132
32156991614,1cyclictest32-21ksoftirqd/219:50:252
3215699161,3cyclictest141rcu_preempt21:20:182
3215699161,3cyclictest0-21swapper/200:10:142
3215699160,8cyclictest0-21swapper/223:35:272
3215399162,12cyclictest24955-21diskmemload21:59:161
32153991614,2cyclictest25-21ksoftirqd/122:13:531
32153991614,1cyclictest25-21ksoftirqd/123:03:361
32153991612,1cyclictest25-21ksoftirqd/121:46:341
3215399160,1cyclictest24955-21diskmemload00:37:401
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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