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2026-08-16 - 02:21

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 15, 2026 12:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1589529482,8sleep00-21swapper/007:06:090
285052920,0sleep10-21swapper/110:38:311
1616629267,9sleep30-21swapper/307:09:423
1587628459,6sleep10-21swapper/107:05:541
1604128371,8sleep20-21swapper/207:08:052
1628699280,28cyclictest0-21swapper/210:36:472
1628399260,24cyclictest0-21swapper/109:20:141
16289992523,1cyclictest381rcuc/310:45:223
1628699250,23cyclictest0-21swapper/211:48:032
1628699240,23cyclictest0-21swapper/210:15:152
1628699240,23cyclictest0-21swapper/210:07:342
1628999236,13cyclictest30551-21ssh12:15:483
1628699230,22cyclictest0-21swapper/211:00:142
1628399230,20cyclictest0-21swapper/111:30:521
1628999222,4cyclictest141rcu_preempt10:33:303
1628699220,22cyclictest0-21swapper/212:21:402
16283992220,1cyclictest0-21swapper/110:41:191
1628399220,21cyclictest0-21swapper/109:25:151
1628999217,12cyclictest39-21ksoftirqd/311:17:423
16289992113,2cyclictest39-21ksoftirqd/311:49:203
1628699211,3cyclictest5724-21apt-get10:25:132
1628699210,21cyclictest0-21swapper/209:43:272
1628699210,21cyclictest0-21swapper/209:43:272
16283992115,2cyclictest18995-21ssh09:35:121
16289992018,2cyclictest39-21ksoftirqd/309:23:133
1628999200,16cyclictest0-21swapper/310:02:163
1628699201,2cyclictest0-21swapper/211:27:532
1628699200,20cyclictest0-21swapper/212:04:592
1628699200,20cyclictest0-21swapper/211:56:332
1628699200,20cyclictest0-21swapper/209:33:092
16280992019,1cyclictest0-21swapper/009:24:170
1628999196,1cyclictest141rcu_preempt10:51:023
16289991917,2cyclictest39-21ksoftirqd/310:27:313
16289991914,5cyclictest39-21ksoftirqd/310:16:543
16289991912,6cyclictest39-21ksoftirqd/312:30:013
1628999190,1cyclictest0-21swapper/312:22:413
16286991915,3cyclictest32-21ksoftirqd/211:45:012
1628699190,19cyclictest0-21swapper/209:53:402
1628699190,17cyclictest0-21swapper/210:04:462
1628399190,18cyclictest0-21swapper/111:51:241
1628099190,14cyclictest0-21swapper/008:40:140
1628999185,3cyclictest141rcu_preempt12:35:473
16289991814,4cyclictest39-21ksoftirqd/310:56:143
1628999180,5cyclictest0-21swapper/311:35:323
1628699182,9cyclictest141rcu_preempt11:35:092
16286991817,1cyclictest0-21swapper/211:34:502
16286991814,3cyclictest311rcuc/207:55:142
1628699180,17cyclictest0-21swapper/209:24:382
1628399180,2cyclictest0-21swapper/112:05:141
1628399180,18cyclictest0-21swapper/110:18:241
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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