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2026-08-07 - 13:09
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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 rack1slot2.osadl.org (updated Fri Aug 07, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2845125243,0sleep30-21swapper/319:27:173
2851924936,0sleep00-21swapper/019:28:060
2832924738,0sleep20-21swapper/219:25:522
2830123525,0sleep10-21swapper/119:25:351
339960,0migration/332453-21sh00:32:133
339960,0migration/330596-21sh00:12:183
339960,0migration/329085-21sh23:53:113
339960,0migration/31588-21sh00:51:093
339960,0migration/31530-21hwlatdetect21:24:503
339960,0migration/314348-21sh22:46:263
339960,0migration/311608-21sh23:42:033
329960,0watchdog/320146-21sh23:47:063
29815060,0irq/29-eth0-tx-4057-21munin-node21:04:550
29815060,0irq/29-eth0-tx-29181-21munin-node20:59:490
29815060,0irq/29-eth0-tx-29083-21munin-node20:14:490
29815060,0irq/29-eth0-tx-16291-21munin-node21:34:562
29815060,0irq/29-eth0-tx-14806-21munin-node20:49:550
29815060,0irq/29-eth0-tx-13502-21sensors_fan22:44:582
29805060,0irq/28-eth0-rx-32481-21kernelversion22:39:523
29805060,0irq/28-eth0-rx-23309-21smartctl22:34:493
29805060,0irq/28-eth0-rx-10239-21iostat_ios23:04:533
287149965,0cyclictest7603-21diskmemload23:20:432
287149960,0cyclictest9075-21kthreadcore19:59:522
287149960,0cyclictest7603-21diskmemload21:48:102
287139966,0cyclictest3524-21snmpd21:30:411
149960,0migration/04624-21kthreadcore19:54:520
149960,0migration/03537-21kthreadcore22:59:550
149960,0migration/030246-21kthreadcore21:19:530
149960,0migration/010272-21sh23:23:400
339950,0migration/38670-21kthreadcore22:24:533
339950,0migration/38400-21munin-node19:59:483
339950,0migration/35758-21kthreadcore22:59:553
339950,0migration/34802-21kthreadcore00:54:543
339950,0migration/34001-21kthreadcore00:14:553
339950,0migration/34001-21kthreadcore00:14:553
339950,0migration/33861-21munin-node22:04:493
339950,0migration/332003-21taskset21:40:563
339950,0migration/329617-21kthreadcore23:34:553
339950,0migration/327174-21kthreadcore19:49:523
339950,0migration/325558-21kthreadcore20:54:543
339950,0migration/318721-21munin-node21:54:463
339950,0migration/317125-21kthreadcore20:49:523
339950,0migration/313754-21kthreadcore22:09:533
339950,0migration/311121-21aten_r1power_fr19:39:473
329950,0watchdog/324246-21munin-node22:54:463
329950,0watchdog/31678-21grep00:34:503
329950,0watchdog/313803-21aten2.4-expect22:29:463
329950,0watchdog/310689-21kthreadcore23:59:543
29815050,0irq/29-eth0-tx-8330-21ssh00:36:172
29815050,0irq/29-eth0-tx-819-21python00:50:002
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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