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2026-03-29 - 21:54
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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
Characteristics of the 50 highest latencies:
System rackcslot4.osadl.org (updated Sun Mar 29, 2026 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
7150222273193,28sleep10-21swapper/107:08:431
7133932255213,28sleep00-21swapper/007:05:100
179699720,3rtkit-daemon0-21swapper/109:50:251
8823502620,5sleep10-21swapper/111:55:191
8714312600,6sleep00-21swapper/011:40:160
179699600,5rtkit-daemon0-21swapper/108:24:540
179699590,3rtkit-daemon0-21swapper/110:34:250
715292995513,10cyclictest734053-21python307:55:011
715292995412,11cyclictest913594-21cat12:40:011
179699540,3rtkit-daemon1795-21rtkit-daemon10:34:111
715292995312,10cyclictest724129-21apt-config07:30:011
715292995311,10cyclictest857152-21wc11:20:011
715292995310,17cyclictest717222-21grep07:15:001
715292995310,11cyclictest771976-21sed09:20:011
715292995224,20cyclictest775488-21apt-get09:25:121
715292995213,10cyclictest723638-21python307:30:011
715292995211,12cyclictest775316-21latency_hist09:25:011
715292995210,12cyclictest822248-21latency_hist10:30:011
179699520,4rtkit-daemon1795-21rtkit-daemon07:57:321
715292995112,12cyclictest790093-21date09:45:011
715292995111,12cyclictest896760-21mailstats12:15:221
715292995110,10cyclictest899066-21python312:20:011
715292995015,11cyclictest812108-21sh10:15:201
715292995011,13cyclictest729187-21grep07:40:221
715292995011,10cyclictest850067-21date11:10:011
715292995010,11cyclictest857948-21grep11:20:191
715292995010,10cyclictest818725-21munin-run10:25:001
715292994913,14cyclictest780373-21sed09:30:251
715292994913,10cyclictest748362-21perf08:29:591
715292994912,9cyclictest853627-21sh11:14:591
715292994912,14cyclictest844377-21grep11:00:241
715292994912,13cyclictest755881-21grep08:45:231
715292994911,11cyclictest892056-21latency_hist12:10:011
715292994910,11cyclictest764415-21latency_hist09:10:011
715292994814,16cyclictest750335-21python308:35:001
715292994813,9cyclictest1-21systemd12:05:001
715292994813,12cyclictest870685-21runrttasks11:39:161
715292994811,11cyclictest843235-21cat11:00:001
715292994811,10cyclictest1-21systemd10:40:241
715292994810,26cyclictest892109-1kworker/1:0H12:15:011
715292994810,12cyclictest719755-21cat07:20:011
715292994718,7cyclictest785996-21python309:40:001
715292994714,8cyclictest825773-21taskset10:35:131
715292994713,11cyclictest793780-21cat09:50:011
715292994713,10cyclictest744484-21dpkg08:20:021
715292994712,9cyclictest807805-21latency_hist10:09:591
715292994712,21cyclictest728094-21sed07:40:001
715292994712,11cyclictest808265-21perl10:10:181
715292994712,11cyclictest764917-21df_inode09:10:161
715292994711,13cyclictest801615-21grep10:00:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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