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2026-04-15 - 22:29
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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 Wed Apr 15, 2026 12:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304729911195,10cyclictest31780-21xargs10:40:231
30469991097,92cyclictest27938-21ssh12:23:250
304699910474,23cyclictest18461-21latency_hist08:03:110
304729910351,32cyclictest0-21swapper/110:48:081
304729910351,32cyclictest0-21swapper/110:48:081
304699910365,14cyclictest6940-21diskmemload09:58:300
3030929915,57sleep130343-21idleruntime-cro07:03:081
3047299943,54cyclictest18104-21apt-get12:08:211
3047299943,54cyclictest18104-21apt-get12:08:211
30469999374,13cyclictest2952-21systemd-journal09:05:340
30469999374,13cyclictest2952-21systemd-journal09:05:340
30475999250,35cyclictest0-21swapper/209:43:252
30475999250,35cyclictest0-21swapper/209:43:252
3047299928,64cyclictest21278-21apt-get12:13:221
30469999257,14cyclictest181rcu_preempt09:23:210
30469999155,27cyclictest10156-21latency_hist07:38:110
3047599903,39cyclictest22226-21grep09:28:442
30475999032,52cyclictest26873-21modprobe11:28:072
3047599902,36cyclictest13783-21ssh11:59:042
3047599902,36cyclictest13783-21ssh11:59:042
30475998946,36cyclictest0-21swapper/208:28:332
3047599892,37cyclictest32124-21grep08:43:272
3047599884,36cyclictest18085-21latency_hist11:13:102
30475998839,35cyclictest5016-21cat08:59:132
3046999882,76cyclictest20992-21modprobe10:23:070
3046999882,76cyclictest20992-21modprobe10:23:070
3048299877,44cyclictest0-21swapper/312:08:413
3048299877,44cyclictest0-21swapper/312:08:413
3047599875,35cyclictest1028-21grep09:48:332
30475998746,36cyclictest30454-21cyclictest12:13:102
30475998746,36cyclictest30454-21cyclictest12:13:102
3047599873,35cyclictest18400-21/usr/sbin/munin11:13:432
3047599873,35cyclictest18400-21/usr/sbin/munin11:13:432
3047599863,32cyclictest6986-21fschecks_time10:53:312
30475998623,55cyclictest14256-21kworker/u18:1+flush-179:012:13:272
30475998613,61cyclictest3763-21apt-get11:43:222
3046999863,31cyclictest26966-21latency_hist09:38:100
3047599854,35cyclictest352-21runrttasks07:03:242
3047599853,38cyclictest32746-21latency_hist11:38:102
3047599853,38cyclictest32746-21latency_hist11:38:102
3047599853,35cyclictest16569-21apt-config07:58:102
3047599852,37cyclictest4024-21apt-get07:18:362
3047599852,37cyclictest4024-21apt-get07:18:362
30472998563,15cyclictest5937-21diskmemload09:43:351
30472998563,15cyclictest5937-21diskmemload09:43:351
3047299853,21cyclictest3812-21ssh11:43:261
30469998563,16cyclictest25863-21vmstat12:18:480
30469998563,16cyclictest25863-21vmstat12:18:480
3047599845,36cyclictest31088-21timerandwakeup08:38:422
3047599845,36cyclictest31088-21timerandwakeup08:38:422
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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