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2026-07-21 - 05:47
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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 Tue Jul 21, 2026 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
988724948,0sleep00-21swapper/019:24:210
993724536,0sleep20-21swapper/219:24:522
1013223624,0sleep10-21swapper/119:27:111
1005823526,0sleep30-21swapper/319:26:213
8305060,0irq/26-0000:00:14074-21munin-run22:58:112
339960,0migration/33638-21sh00:06:453
339960,0migration/326660-21sh22:25:283
339960,0migration/324656-21munin-node23:38:383
339960,0migration/324038-21switchtime22:03:363
339960,0migration/323466-21munin-node00:38:253
339960,0migration/318172-21munin-node20:18:233
339960,0migration/312728-21sh00:13:113
29815060,0irq/29-eth0-tx-24903-21munin-node19:38:240
29805060,0irq/28-eth0-rx-23341-21ssh21:47:013
29805060,0irq/28-eth0-rx-22557-21perl21:28:243
29805060,0irq/28-eth0-rx-11504-21grep22:18:253
149960,0migration/022108-21sh00:35:160
149960,0migration/021488-21latency_hist20:43:100
149960,0migration/014636-21sh23:14:370
149960,0migration/013180-21kthreadcore22:18:290
149960,0migration/01079-21sh22:10:360
4150,0ktimersoftd/00-21swapper/000:55:390
339950,0migration/3975-21fschecks_count21:53:253
339950,0migration/37430-21kthreadcore22:33:293
339950,0migration/33831-21irqrtprio22:13:293
339950,0migration/330131-21latency_hist21:33:103
339950,0migration/329219-21fschecks_count20:03:243
339950,0migration/328956-21munin-node22:28:283
339950,0migration/328117-21kthreadcore21:08:293
339950,0migration/327957-21kthreadcore19:38:293
339950,0migration/324741-21kthreadcore00:18:283
339950,0migration/322238-21open_files23:18:343
339950,0migration/319496-21kthreadcore22:58:313
339950,0migration/318234-21kthreadcore22:38:303
339950,0migration/317377-21taskset20:14:323
339950,0migration/314456-21cpuspeed_turbos19:53:233
339950,0migration/314456-21cpuspeed_turbos19:53:233
339950,0migration/312807-21sh22:54:273
339950,0migration/310889-21latency_hist20:58:103
329950,0watchdog/38648-21kthreadcore21:38:303
329950,0watchdog/328995-21cut21:48:303
329950,0watchdog/323868-21grep19:33:333
329950,0watchdog/315576-21fschecks_time21:23:263
329950,0watchdog/312242-21wc23:53:263
329950,0watchdog/30-21swapper/320:33:303
329950,0watchdog/30-21swapper/319:43:293
29815050,0irq/29-eth0-tx-7210-21munin-node20:33:280
29815050,0irq/29-eth0-tx-5667-21ntp_kernel_pll_00:43:332
29815050,0irq/29-eth0-tx-28908-21ssh21:30:250
29815050,0irq/29-eth0-tx-24650-21munin-node23:23:282
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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