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2026-05-22 - 09:26
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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 50 highest latencies:
System rackbslot7.osadl.org (updated Fri May 22, 2026 00:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3037421237,74sleep230375-21cpu18:56:002
3037421237,74sleep230375-21cpu18:56:002
30587211513,64sleep130646-21tune2fs18:56:281
30587211513,64sleep130646-21tune2fs18:56:281
3158321066,16sleep00-21swapper/018:59:200
3158321066,16sleep00-21swapper/018:59:200
31845999361,23cyclictest8156-21ssh21:56:382
31845999361,23cyclictest8156-21ssh21:56:382
223552910,7sleep222360-21unixbench_multi20:06:172
31845999051,10cyclictest181rcu_preempt23:03:552
31840999040,38cyclictest22760-21apt-get23:15:541
31840998827,23cyclictest0-21swapper/123:35:441
31840998827,23cyclictest0-21swapper/123:35:441
31835998565,13cyclictest297-21systemd-logind23:25:420
31845998463,15cyclictest11227-21ntp_kernel_err22:01:102
31845998263,9cyclictest0-21swapper/200:06:152
31845998161,13cyclictest0-21swapper/220:31:132
31845998158,14cyclictest7243-21cron21:55:412
31840998161,10cyclictest0-21swapper/119:56:291
31840998161,10cyclictest0-21swapper/119:56:291
31835998157,16cyclictest7778-21apt-get21:56:240
31835998157,16cyclictest7778-21apt-get21:56:240
31835998133,42cyclictest14089-21grep19:41:290
31845998059,14cyclictest31133-21kworker/u17:0-xprtiod23:46:172
31845998059,14cyclictest31133-21kworker/u17:0-xprtiod23:46:172
31835998047,26cyclictest0-21swapper/000:00:400
31835998047,26cyclictest0-21swapper/000:00:400
31845997963,9cyclictest0-21swapper/222:41:062
31845997961,11cyclictest0-21swapper/222:06:032
31845997954,15cyclictest0-21swapper/220:16:072
31845997948,22cyclictest20070-21cut20:01:022
31835997948,21cyclictest29546-21apt-get20:30:550
31845997862,9cyclictest0-21swapper/200:11:172
31845997862,9cyclictest0-21swapper/200:11:172
31840997863,8cyclictest0-21swapper/121:21:081
31840997859,13cyclictest19275-21munin-plugin-st22:15:411
31840997859,13cyclictest19275-21munin-plugin-st22:15:411
31840997857,15cyclictest544-21cron21:15:411
31840997857,10cyclictest0-21swapper/120:25:451
31835997845,23cyclictest5405-21apt-get20:55:520
31835997844,26cyclictest4562-21apt-get21:50:550
31835997836,30cyclictest17057-21ssh22:11:070
31835997836,30cyclictest17057-21ssh22:11:070
31835997829,38cyclictest29680-21ls00:21:080
31840997757,10cyclictest0-21swapper/120:11:011
31840997724,22cyclictest0-21swapper/119:23:461
31845997659,12cyclictest0-21swapper/221:16:102
31845997659,12cyclictest0-21swapper/221:16:102
31845997659,11cyclictest0-21swapper/221:36:172
31845997659,11cyclictest0-21swapper/221:36:172
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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