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2025-10-10 - 11:29

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #8

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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  Congatec
Click here to display the system's profile data.
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 rackeslot8s.osadl.org (updated Fri Oct 10, 2025 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
101188299750746,3cyclictest955218-21kworker/1:2+events19:19:511
101188899749740,4cyclictest3109864-21kworker/3:1+events20:05:223
101188499749745,3cyclictest993344-21kworker/2:1+events21:08:222
101188899748738,5cyclictest1226737-21kworker/3:2+events23:50:203
101188299747743,3cyclictest1082868-21kworker/1:1+events22:09:391
101187999745740,4cyclictest1420666-21turbostat00:39:550
101188299744739,4cyclictest955218-21kworker/1:2+events19:39:011
101188899743736,6cyclictest1226737-21kworker/3:2+events23:30:223
101188499743738,4cyclictest993344-21kworker/2:1+events21:10:422
101188299743739,3cyclictest955218-21kworker/1:2+events19:43:421
101188299741735,5cyclictest1026337-21turbostat19:24:551
101188899740737,2cyclictest1107741-21turbostat20:29:553
101188899740734,5cyclictest3109864-21kworker/3:1+events20:32:403
101188299740736,3cyclictest1082868-21kworker/1:1+events22:11:281
101188299739735,3cyclictest955218-21kworker/1:2+events19:47:431
101188299739735,3cyclictest955218-21kworker/1:2+events19:47:421
101188899738733,4cyclictest3109864-21kworker/3:1+events21:36:123
101188299738734,3cyclictest955218-21kworker/1:2+events19:27:311
101188899737731,5cyclictest3109864-21kworker/3:1+events20:20:223
101188499737732,4cyclictest993344-21kworker/2:1+events21:20:202
101188499737731,5cyclictest993344-21kworker/2:1+events21:28:482
101188299737733,3cyclictest955218-21kworker/1:2+events19:52:391
101188299737733,3cyclictest955218-21kworker/1:2+events19:34:531
101188899736730,5cyclictest3109864-21kworker/3:1+events20:16:353
101188499736731,4cyclictest993344-21kworker/2:1+events21:33:392
101188899734724,4cyclictest1226737-21kworker/3:2+events23:40:213
101188499734729,4cyclictest993344-21kworker/2:1+events21:18:342
101188899733726,6cyclictest1226737-21kworker/3:2+events22:50:213
101188899732728,3cyclictest1226737-21kworker/3:2+events22:37:083
101188499732727,4cyclictest993344-21kworker/2:1+events00:26:062
101188299732728,3cyclictest955218-21kworker/1:2+events19:55:431
101188899730725,4cyclictest3109864-21kworker/3:1+events21:41:273
101188499730722,5cyclictest993344-21kworker/2:1+events00:19:102
101188899729726,2cyclictest1245828-21turbostat22:19:553
101188899725721,3cyclictest1226737-21kworker/3:2+events22:45:443
101188899724720,3cyclictest1226737-21kworker/3:2+events23:14:083
101188899723720,2cyclictest3109864-21kworker/3:1+events21:46:283
101188899723720,2cyclictest3109864-21kworker/3:1+events21:46:283
101188899723720,2cyclictest1226737-21kworker/3:2+events22:25:203
101188899723720,2cyclictest1226737-21kworker/3:2+events00:01:273
101188899722718,3cyclictest1226737-21kworker/3:2+events22:01:593
101188899722717,4cyclictest3109864-21kworker/3:1+events20:41:573
101188899719715,3cyclictest3109864-21kworker/3:1+events20:45:223
101188899719715,3cyclictest1226737-21kworker/3:2+events00:14:193
101188899718715,2cyclictest1226737-21kworker/3:2+events22:57:093
101188899718714,3cyclictest3109864-21kworker/3:1+events20:54:513
101188899717714,2cyclictest1226737-21kworker/3:2+events00:23:283
101188899717713,3cyclictest1226737-21kworker/3:2+events23:20:553
101188899716712,3cyclictest3109864-21kworker/3:1+events20:11:163
101188899716712,3cyclictest1226737-21kworker/3:2+events23:25:423
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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