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2026-05-17 - 07:01
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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 Sun May 17, 2026 00:44:27)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27951214010,102sleep00-21swapper/018:56:280
2788521229,73sleep127887-21diskstats18:56:251
292009911956,13cyclictest0-21swapper/122:51:021
292009911956,13cyclictest0-21swapper/122:51:021
1539221130,5sleep115366-21ssh00:01:041
292009910442,18cyclictest12409-21latency_hist23:56:031
292009910346,15cyclictest20146-21http22:21:051
291919910040,36cyclictest24784-21ssh21:33:240
2920099962,47cyclictest5778-21apt-get22:51:161
2920099962,47cyclictest5778-21apt-get22:51:161
2879329439,16sleep2181rcu_preempt18:57:452
29191999347,20cyclictest3356-21kworker/u18:2-events_unbound19:21:050
29191999267,17cyclictest13351-21latency_hist21:16:050
29191999049,8cyclictest181rcu_preempt19:06:040
29204998968,15cyclictest14776-21runrttasks23:59:402
29204998950,19cyclictest0-21swapper/222:09:242
29204998846,18cyclictest29183-21cyclictest21:48:452
29204998846,18cyclictest29183-21cyclictest21:48:452
29191998860,8cyclictest181rcu_preempt19:07:370
29191998859,21cyclictest0-21swapper/023:49:390
2919199883,42cyclictest15-21ksoftirqd/023:26:150
29204998769,13cyclictest29183-21cyclictest22:06:012
29204998743,8cyclictest181rcu_preempt00:06:022
29191998769,11cyclictest0-21swapper/022:41:310
29204998664,9cyclictest181rcu_preempt19:36:232
29204998640,9cyclictest181rcu_preempt23:11:002
2921199853,35cyclictest0-21swapper/322:51:273
2921199853,35cyclictest0-21swapper/322:51:273
29204998561,12cyclictest0-21swapper/220:46:032
29204998469,10cyclictest29183-21cyclictest19:26:042
29191998462,11cyclictest0-21swapper/020:06:260
29191998462,11cyclictest0-21swapper/020:06:260
29204998364,9cyclictest0-21swapper/223:31:402
29200998330,25cyclictest4381-21diskmemload00:11:041
29191998362,11cyclictest0-21swapper/019:31:350
29191998361,12cyclictest0-21swapper/020:26:220
29191998346,7cyclictest181rcu_preempt00:08:270
29191998343,17cyclictest0-21swapper/020:11:290
29204998260,13cyclictest0-21swapper/219:56:042
29204998260,10cyclictest0-21swapper/219:51:052
29204998260,10cyclictest0-21swapper/219:51:052
29204998259,14cyclictest17719-21ntp_kernel_pll_20:01:282
29204998238,9cyclictest181rcu_preempt20:17:062
29200998245,28cyclictest18544-21cron20:06:011
29191998266,11cyclictest29183-21cyclictest22:52:150
29191998266,11cyclictest29183-21cyclictest22:52:150
29191998263,9cyclictest0-21swapper/019:36:260
29191998260,9cyclictest181rcu_preempt20:21:240
29204998159,15cyclictest2374-21systemd-journal22:18:572
29204998145,8cyclictest181rcu_preempt23:37:572
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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