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2026-05-24 - 03:52
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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 Sun May 24, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2860224432,0sleep10-21swapper/119:21:341
2867924233,0sleep30-21swapper/319:22:283
2849123127,0sleep00-21swapper/019:20:170
2850322920,0sleep20-21swapper/219:20:272
35160,0ktimersoftd/30-21swapper/300:29:243
339960,0migration/38335-21sh22:36:503
339960,0migration/35308-21unixbench_singl23:28:553
339960,0migration/326170-21ntp_offset23:03:473
339960,0migration/324373-21pmu-power23:58:503
339960,0migration/317877-21sh21:44:323
339960,0migration/315392-21sh00:33:443
339960,0migration/314688-21sh21:24:093
339960,0migration/31200-21sh00:04:043
29805060,0irq/28-eth0-rx-6064-21sshd00:44:343
19160,0ktimersoftd/10-21swapper/122:03:481
149960,0migration/027709-21sh21:52:280
4150,0ktimersoftd/00-21swapper/023:39:320
35150,0ktimersoftd/30-21swapper/321:18:283
339950,0migration/38370-21fschecks_time20:38:403
339950,0migration/38223-21fschecks_time23:33:413
339950,0migration/3699-21latency_hist23:48:283
339950,0migration/35383-21df_abs23:13:403
339950,0migration/33983-21latency_hist20:13:263
339950,0migration/332052-21kthreadcore19:23:433
339950,0migration/331454-21runrttasks19:43:463
339950,0migration/329932-21kthreadcore22:28:463
339950,0migration/328642-21taskset20:48:563
339950,0migration/326748-21kthreadcore22:08:453
339950,0migration/326420-21taskset22:48:313
339950,0migration/325380-21taskset20:28:103
339950,0migration/325289-21kthreadcore00:38:463
339950,0migration/325148-21kthreadcore23:23:443
339950,0migration/320225-21kthreadcore21:28:463
339950,0migration/318220-21latency_hist19:38:263
339950,0migration/31803-21latency_hist21:38:273
339950,0migration/314992-21munin-node19:58:413
339950,0migration/314855-21latency_hist20:43:273
339950,0migration/314046-21kthreadcore23:53:463
339950,0migration/310748-21taskset19:31:583
329950,0watchdog/33877-21cat20:33:463
329950,0watchdog/33411-21sh23:10:023
329950,0watchdog/326043-21cut23:43:463
329950,0watchdog/324153-21python22:43:503
329950,0watchdog/323618-21ssh22:27:383
329950,0watchdog/321253-21ssh22:07:183
329950,0watchdog/310414-21kthreadcore00:48:463
29815050,0irq/29-eth0-tx-7073-21ssh00:47:182
29815050,0irq/29-eth0-tx-13859-21unixbench-2d23:33:522
29815050,0irq/29-eth0-tx-13061-21iostat_ios00:13:442
29815050,0irq/29-eth0-tx-0-21swapper/223:32:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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