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2026-08-15 - 10:02
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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 Sat Aug 15, 2026 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2577624039,0sleep00-21swapper/019:30:050
2555023525,0sleep10-21swapper/119:27:291
2540422723,0sleep30-21swapper/319:25:433
2505322622,0sleep20-21swapper/219:25:382
25859991212,0cyclictest3524-21snmpd22:04:490
339960,0migration/35424-21sh21:46:103
339960,0migration/32399-21sh22:40:593
339960,0migration/321575-21sh00:29:533
339960,0migration/320299-21munin-node20:10:303
339960,0migration/314322-21sh21:51:563
339960,0migration/311516-21taskset20:03:143
29815060,0irq/29-eth0-tx-15616-21munin-node20:30:400
29805060,0irq/28-eth0-rx-8889-21tr00:00:333
29805060,0irq/28-eth0-rx-0-21swapper/322:20:343
29805060,0irq/28-eth0-rx-0-21swapper/300:15:593
27160,0ktimersoftd/20-21swapper/223:39:032
258609960,0cyclictest4769-21diskmemload00:37:091
19160,0ktimersoftd/10-21swapper/123:39:031
149960,0migration/031267-21munin-node21:45:260
149960,0migration/026938-21kthreadcore21:20:330
149960,0migration/018721-21missed_timers22:50:340
149960,0migration/01156-21aten_r1power_po23:40:260
8305050,0irq/26-0000:00:26269-21latency_hist21:00:133
339950,0migration/3893-21taskset21:03:513
339950,0migration/38911-21fschecks_count20:25:283
339950,0migration/38682-21aten_r1power_po21:10:263
339950,0migration/36973-21kthreadcore21:30:323
339950,0migration/36777-21kthreadcore21:05:323
339950,0migration/33338-21kthreadcore19:35:333
339950,0migration/330508-21fschecks_count20:40:273
339950,0migration/328118-21kthreadcore00:50:323
339950,0migration/325753-21kthreadcore19:50:293
339950,0migration/325498-21kthreadcore00:30:313
339950,0migration/319759-21kthreadcore19:45:333
339950,0migration/313688-21kthreadcore20:50:293
329950,0watchdog/38074-21cut23:05:293
329950,0watchdog/36314-21runrttasks23:36:053
329950,0watchdog/33966-21kthreadcore23:20:333
329950,0watchdog/328736-21cut19:30:373
329950,0watchdog/320010-21kthreadcore23:10:333
329950,0watchdog/315059-21kthreadcore20:05:293
329950,0watchdog/30-21swapper/320:30:333
29815050,0irq/29-eth0-tx-9033-21munin-node22:10:302
29815050,0irq/29-eth0-tx-19099-21munin-node20:10:260
29815050,0irq/29-eth0-tx-17958-21ssh00:05:382
29815050,0irq/29-eth0-tx-15718-21munin-node21:55:342
29815050,0irq/29-eth0-tx-1258-21munin-node21:05:340
29815050,0irq/29-eth0-tx-10901-21munin-node22:30:402
29815050,0irq/29-eth0-tx-0-21swapper/223:59:192
29815050,0irq/29-eth0-tx-0-21swapper/222:25:312
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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