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2025-10-26 - 03:54
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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 rackbslot7.osadl.org (updated Sun Oct 26, 2025 00:44:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17428212518,68sleep117455-21munin-run19:09:291
17577991153,103cyclictest1101-21apt-get22:19:430
294921140,6sleep20-21swapper/200:10:132
121821110,6sleep10-21swapper/123:14:231
744021030,7sleep024715-21diskmemload22:29:310
744021030,7sleep024715-21diskmemload22:29:310
1759099983,8cyclictest0-21swapper/121:54:421
1759099973,28cyclictest17743-21seq00:35:431
17597999675,15cyclictest18087-21latency_hist20:49:302
1759099937,75cyclictest0-21swapper/123:54:421
1759099933,7cyclictest0-21swapper/123:44:411
1759099925,8cyclictest0-21swapper/123:29:411
1759099925,8cyclictest0-21swapper/123:29:411
1759099913,18cyclictest13711-21ssh23:35:001
1757799912,52cyclictest15-21ksoftirqd/021:44:500
17597999033,23cyclictest26811-21seq23:55:572
17597999029,29cyclictest5858-21seq22:25:302
17597999029,29cyclictest5858-21seq22:25:302
1759099905,74cyclictest0-21swapper/120:19:401
17577999065,17cyclictest10228-21latency_hist22:34:290
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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