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2026-04-08 - 10:04
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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
Characteristics of the 50 highest latencies:
System rackcslot4.osadl.org (updated Wed Apr 08, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23400492322280,27sleep00-21swapper/019:06:150
23400752264221,29sleep10-21swapper/119:06:321
250276721590,5sleep02502687-21munin-run23:50:010
25034002690,4sleep02503362-40apt-check23:50:120
24181132640,5sleep02418000-21python321:50:010
234053599632,42cyclictest2474953-21apt-get23:10:130
234053599632,41cyclictest2392913-21apt-get21:15:110
234053599622,42cyclictest2461057-21apt-get22:50:110
179699600,1rtkit-daemon1795-21rtkit-daemon21:34:270
234053599593,38cyclictest2352991-21apt-get19:40:110
234053599583,38cyclictest2400061-21apt-get21:25:140
234053599580,5cyclictest2397319-21/usr/sbin/munin21:20:190
179699570,3rtkit-daemon1795-21rtkit-daemon20:50:000
179699570,3rtkit-daemon0-21swapper/020:30:060
234053599567,30cyclictest2436197-21apt-get22:15:110
234053599567,30cyclictest2346874-21seq19:24:430
234053599560,3cyclictest2361376-21cat20:00:190
179699560,3rtkit-daemon1795-21rtkit-daemon23:39:550
179699560,3rtkit-daemon1795-21rtkit-daemon23:03:560
234053599552,30cyclictest2471468-21apt-get23:05:130
179699550,3rtkit-daemon0-21swapper/020:53:060
234053599541,29cyclictest2524652-21apt-get00:20:100
2340535995411,28cyclictest2511268-21rt-features00:00:240
234053599541,11cyclictest2412261-21ssh21:40:410
234053599540,7cyclictest2498332-21ssh23:43:190
179699540,3rtkit-daemon1795-21rtkit-daemon19:58:440
179699540,3rtkit-daemon0-21swapper/021:36:450
234053599539,28cyclictest2422681-21idleruntime21:55:160
234053599535,31cyclictest2388888-21diskmemload22:26:290
234053599531,7cyclictest2450585-21ssh22:35:090
234053599530,7cyclictest2460168-21ssh22:48:250
179699530,3rtkit-daemon0-21swapper/022:01:460
234053599521,7cyclictest2448706-21ssh22:31:550
2340535995211,27cyclictest2430040-21sh22:05:210
234053599520,9cyclictest2480358-21ssh23:16:350
234053599512,23cyclictest2418619-21apt-get21:50:110
234053599511,35cyclictest2389165-21apt-get21:10:130
179699510,3rtkit-daemon1795-21rtkit-daemon22:40:090
179699510,3rtkit-daemon1795-21rtkit-daemon19:47:590
179699510,18rtkit-daemon1795-21rtkit-daemon21:00:110
234053599502,5cyclictest2521067-21apt-get00:15:120
234053599500,38cyclictest2479286-21kworker/u8:200:13:220
179699500,3rtkit-daemon1795-21rtkit-daemon23:33:280
179699500,3rtkit-daemon1795-21rtkit-daemon22:59:340
234053599492,23cyclictest2365228-21apt-get20:10:140
234053599491,9cyclictest2387744-21memory21:05:190
234053599491,3cyclictest2538036-21ssh00:38:230
234053599490,3cyclictest2362547-21apt-get20:05:270
234053599488,29cyclictest2515453-21ssh00:06:190
234053599481,3cyclictest2528988-21ntp_states00:25:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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