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2026-03-19 - 22:40
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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 rackeslot6.osadl.org (updated Thu Mar 19, 2026 12:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
348108499119108,7cyclictest3497174-21latency_hist08:00:010
34810869911590,22cyclictest3498781-21latency_hist08:05:011
34810849911394,16cyclictest3514940-21latency_hist08:55:010
348108499110100,7cyclictest3506858-21gpgv08:30:010
3481086999081,6cyclictest3562944-21latency_hist11:25:011
3481084998778,5cyclictest3484146-21kworker/u8:0+flush-179:007:40:220
3481086998678,6cyclictest3548612-21latency_hist10:40:021
3481086998559,23cyclictest3566117-21latency_hist11:35:021
3481086998169,10cyclictest266-21systemd-journal07:20:001
3481084998172,7cyclictest3500602-21/usr/sbin/munin08:10:230
3481084998171,7cyclictest3567985-21latency_hist11:40:020
3481084998171,7cyclictest3567985-21latency_hist11:40:010
3481086997970,6cyclictest3513389-21kworker/u8:2+flush-179:009:00:231
3481086997968,9cyclictest266-21systemd-journal09:50:011
3481084997968,8cyclictest3521543-21/usr/sbin/munin09:15:230
3481084997871,5cyclictest3532692-21kworker/u8:0+flush-179:010:10:010
3481084997868,7cyclictest3524499-21latency_hist09:25:000
3481084997668,5cyclictest3548667-21kworker/u8:1+flush-179:010:55:210
3481084997667,7cyclictest3527977-21kworker/u8:3+flush-179:009:50:240
3481086997264,6cyclictest3497430-21kworker/u8:1+flush-179:008:25:201
3481086997263,7cyclictest3524535-21kworker/u8:2+events_unbound09:30:021
3481084997265,5cyclictest3510152-21kworker/u8:2+flush-179:008:40:230
3481084997238,32cyclictest0-21swapper/008:21:000
3481084997238,32cyclictest0-21swapper/008:21:000
3481086997138,32cyclictest714-21Xorg08:21:001
3481086997138,32cyclictest714-21Xorg08:21:001
3481086996957,10cyclictest266-21systemd-journal12:05:011
3481086996957,10cyclictest266-21systemd-journal12:05:001
3481084996963,5cyclictest3567938-21kworker/u8:1+flush-179:011:45:000
3481086996857,5cyclictest3497430-21kworker/u8:1+events_unbound08:30:021
348108499681,64cyclictest1-21systemd09:50:010
3481086996761,4cyclictest3531124-21latency_hist09:45:011
3481086996761,4cyclictest3492400-21kworker/u8:2+flush-179:007:50:231
3481084996759,6cyclictest3553385-21latency_hist10:55:010
3481086996657,7cyclictest3577549-21kworker/u8:0+events_unbound12:30:001
3481086996555,8cyclictest3518391-21apt-get09:05:131
3481086996554,9cyclictest3580950-21/usr/sbin/munin12:20:211
3481086996445,18cyclictest3556014-21kworker/u8:2+flush-179:011:14:551
3481084996355,6cyclictest3560004-21apt-get11:15:110
3481084996355,5cyclictest3499359-21kworker/u8:0+flush-179:008:05:230
3481086996257,3cyclictest3532744-21kworker/u8:2+flush-179:010:15:141
3481086996254,5cyclictest3497430-21kworker/u8:1+flush-179:008:35:221
3481086996155,5cyclictest3527391-21kworker/u8:1+flush-179:009:35:221
3481084996150,9cyclictest3571410-21apt-get11:50:100
3481086996053,5cyclictest3537533-21kworker/u8:3+flush-179:010:45:231
3481092995956,2cyclictest0-21swapper/307:25:003
3481084995953,5cyclictest3558147-21kworker/u8:1+events_unbound11:10:220
3481084995953,5cyclictest3537533-21kworker/u8:3+flush-179:010:29:560
3481084995953,5cyclictest3537533-21kworker/u8:3+flush-179:010:20:230
3481084995953,4cyclictest3567938-21kworker/u8:1+flush-179:012:15:200
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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