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2026-03-11 - 01:52
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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 20 highest latencies:
System rack0slot5.osadl.org (updated Wed Mar 11, 2026 00:43:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
57349499706309,396cyclictest0-21swapper/621:31:2412
5734809952525,499cyclictest0-21swapper/200:02:008
5735259951517,498cyclictest0-21swapper/1300:25:005
57349199503501,2cyclictest617981-21kworker/5:0+i915-unordered20:03:0011
5734809949122,468cyclictest0-21swapper/219:35:588
57347599482481,1cyclictest0-21swapper/120:20:001
57352899474473,1cyclictest511421-21kworker/14:2+i915-unordered19:18:006
57351399467466,1cyclictest793409-21kworker/10:2+i915-unordered23:26:172
5735259945427,29cyclictest0-21swapper/1322:40:455
5735179945413,439cyclictest0-21swapper/1123:25:003
5735179945112,438cyclictest0-21swapper/1122:35:003
5735179945111,439cyclictest0-21swapper/1119:35:583
573517994510,450cyclictest0-21swapper/1122:30:003
5734719945121,29cyclictest854335-21threads00:24:230
5735259945024,29cyclictest0-21swapper/1319:14:465
57351799450449,1cyclictest0-21swapper/1100:25:003
573517994500,449cyclictest0-21swapper/1122:51:213
5735259944923,29cyclictest0-21swapper/1323:47:235
573522994490,448cyclictest0-21swapper/1222:51:214
573499994490,58cyclictest0-21swapper/719:51:0013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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