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2026-09-04 - 07:50

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #4

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 rack7slot4s.osadl.org (updated Fri Sep 04, 2026 00:45:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23041997952,17cyclictest35966irq/58-eth023:10:163
2303399633,24cyclictest1836466ssh21:15:122
23013995826,24cyclictest12-21ksoftirqd/000:20:130
23041995742,8cyclictest35966irq/58-eth021:15:123
2302099553,43cyclictest13653-21ssh21:30:171
2303399540,44cyclictest0-21swapper/219:40:132
23013995311,7cyclictest131rcu_preempt19:25:130
23013995311,7cyclictest131rcu_preempt19:25:130
2301399525,7cyclictest131rcu_preempt00:25:120
23020994926,12cyclictest131rcu_preempt23:25:121
2304199482,32cyclictest0-21swapper/323:30:173
2302099484,34cyclictest3357-21ssh22:35:121
2302099472,35cyclictest29169-21ssh00:00:131
23033994620,19cyclictest0-21swapper/222:45:132
2303399460,38cyclictest12713-21apt-get20:40:122
2303399460,34cyclictest0-21swapper/222:50:182
2301399461,37cyclictest6839-21ssh23:30:180
2303399442,25cyclictest16754-21ssh23:00:142
2303399441,35cyclictest6635-21apt-get20:00:132
2302099442,27cyclictest30918-21ssh22:50:171
2303399434,23cyclictest1770-21ssh23:45:122
2303399431,28cyclictest25878-21apt-get20:20:122
2303399430,39cyclictest30001-21diskmemload23:25:122
2303399411,33cyclictest21063-21apt-get20:15:132
2301399413,30cyclictest16768-21ssh23:00:130
2304199403,21cyclictest35966irq/58-eth023:35:153
2303399401,33cyclictest5803-21ssh00:05:122
2303399400,33cyclictest0-21swapper/221:30:192
2303399400,25cyclictest17621-21ssh00:29:072
2302099403,27cyclictest24049-21ssh00:15:131
2302099403,27cyclictest24049-21ssh00:15:131
2302099401,31cyclictest22342-21ssh22:10:171
2301399401,9cyclictest9243-21apt-get21:10:140
2301399401,8cyclictest0-21swapper/021:35:120
2304199393,24cyclictest35966irq/58-eth021:10:153
2303399391,32cyclictest31991-21apt-get21:40:162
2303399390,35cyclictest27606-21apt-get21:20:162
2303399390,35cyclictest0-21swapper/220:35:132
2303399390,34cyclictest0-21swapper/222:10:152
2303399390,34cyclictest0-21swapper/200:30:152
2303399380,34cyclictest0-21swapper/200:15:132
2303399380,34cyclictest0-21swapper/200:15:132
2302099380,29cyclictest11715-21ssh23:15:121
2303399371,32cyclictest10599-21wc23:30:322
2303399371,27cyclictest8950-21ssh22:00:372
2303399370,31cyclictest0-21swapper/221:50:152
2301399372,27cyclictest2681-21ssh23:10:160
2301399371,4cyclictest27240-21ssh21:55:130
2304199369,23cyclictest35966irq/58-eth023:40:133
2304199364,20cyclictest35966irq/58-eth019:50:143
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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