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2026-08-21 - 16:55
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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 100 highest latencies:
System rack1slot2.osadl.org (updated Fri Aug 21, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1495427776,0sleep20-21swapper/207:28:262
351670,0ktimersoftd/38043-21perf07:30:353
1441423534,0sleep10-21swapper/107:26:091
1490423127,0sleep00-21swapper/007:27:520
152249970,0cyclictest0-21swapper/110:46:031
4160,0ktimersoftd/00-21swapper/008:11:030
329960,0watchdog/322244-21grep12:55:583
29805060,0irq/28-eth0-rx-3900-21tr10:11:043
152259960,0cyclictest0-21swapper/211:01:142
152249965,0cyclictest9987-21grep10:35:591
152239960,0cyclictest16089-21ssh12:11:090
149960,0migration/07711-21kthreadcore09:56:030
149960,0migration/022822-21kthreadcore09:26:030
149960,0migration/018144-21sh10:57:480
4150,0ktimersoftd/00-21swapper/011:06:450
339950,0migration/39002-21sh12:09:183
339950,0migration/38690-21smart_sda10:51:093
339950,0migration/37333-21sh10:31:303
339950,0migration/36930-21kthreadcore12:46:023
339950,0migration/34719-21kthreadcore12:26:053
339950,0migration/332074-21kthreadcore09:31:033
339950,0migration/331600-21unixbench_multi12:01:113
339950,0migration/329455-21kthreadcore08:46:023
339950,0migration/327308-21sh09:47:073
339950,0migration/324232-21kthreadcore10:06:033
339950,0migration/322000-21kthreadcore11:01:033
339950,0migration/319028-21sendmail_mailst11:16:083
339950,0migration/312746-21taskset09:58:113
339950,0migration/312716-21irqcore09:41:033
339950,0migration/312212-21taskset09:20:553
339950,0migration/312020-21munin-node11:31:053
339950,0migration/311013-21munin-node12:11:043
329950,0watchdog/38549-21cut10:16:013
329950,0watchdog/34395-21cpuspeed_turbos11:10:573
329950,0watchdog/330638-21python10:26:093
329950,0watchdog/322283-21ssh11:38:573
329950,0watchdog/312823-21interrupts12:31:023
329950,0watchdog/30-21swapper/312:16:023
329950,0watchdog/30-21swapper/311:21:013
29815050,0irq/29-eth0-tx-4988-21munin-node09:16:030
29815050,0irq/29-eth0-tx-26869-21munin-node12:21:022
29815050,0irq/29-eth0-tx-1055-21munin-node08:06:130
29805050,0irq/28-eth0-rx-938-21kthreadcore11:26:043
29805050,0irq/28-eth0-rx-559-21irqcore11:46:033
29805050,0irq/28-eth0-rx-30742-21taskset11:43:523
29805050,0irq/28-eth0-rx-30742-21taskset11:43:523
29805050,0irq/28-eth0-rx-2498-21sed08:51:023
29805050,0irq/28-eth0-rx-20253-21python10:01:103
29805050,0irq/28-eth0-rx-1870-21python11:06:083
29805050,0irq/28-eth0-rx-17918-21kthreadcore09:01:043
29805050,0irq/28-eth0-rx-1761-21kthreadcore09:11:053
29805050,0irq/28-eth0-rx-17226-21mailstats10:56:083
29805050,0irq/28-eth0-rx-0-21swapper/312:51:513
29805050,0irq/28-eth0-rx-0-21swapper/312:42:033
29805050,0irq/28-eth0-rx-0-21swapper/312:40:323
29805050,0irq/28-eth0-rx-0-21swapper/312:22:363
29805050,0irq/28-eth0-rx-0-21swapper/311:53:443
29805050,0irq/28-eth0-rx-0-21swapper/310:45:593
29805050,0irq/28-eth0-rx-0-21swapper/310:36:033
29805050,0irq/28-eth0-rx-0-21swapper/310:22:473
29805050,0irq/28-eth0-rx-0-21swapper/309:51:123
29805050,0irq/28-eth0-rx-0-21swapper/309:39:243
29805050,0irq/28-eth0-rx-0-21swapper/308:01:103
249950,0watchdog/227060-21df_abs09:30:572
19150,0ktimersoftd/10-21swapper/111:06:451
179950,0migration/17356-21munin-node08:06:091
179950,0migration/15451-21kthreadcore12:26:051
179950,0migration/129133-21munin-node12:40:591
179950,0migration/119075-21taskset11:16:111
179950,0migration/119002-21latency_hist08:40:461
179950,0migration/118813-21kthreadcore09:01:041
179950,0migration/116073-21kthreadcore09:21:041
179950,0migration/115319-21taskset08:59:171
169950,0watchdog/113093-21iostat_ios07:51:011
152259955,0cyclictest0-21swapper/211:56:352
152259955,0cyclictest0-21swapper/211:15:072
152259955,0cyclictest0-21swapper/210:39:572
152259955,0cyclictest0-21swapper/209:38:282
152259955,0cyclictest0-21swapper/208:40:462
152259950,0cyclictest0-21swapper/209:41:092
152249950,0cyclictest0-21swapper/111:13:381
152249950,0cyclictest0-21swapper/110:34:421
152239955,0cyclictest0-21swapper/012:03:450
152239955,0cyclictest0-21swapper/011:53:580
152239955,0cyclictest0-21swapper/009:47:510
152239955,0cyclictest0-21swapper/009:01:010
152239950,0cyclictest0-21swapper/012:40:190
149950,0migration/09155-21kthreadcore07:46:020
149950,0migration/08636-21kthreadcore09:36:050
149950,0migration/0743-21taskset08:05:320
149950,0migration/06765-21kthreadcore12:26:050
149950,0migration/06108-21aten_r1power_en11:30:580
149950,0migration/05976-21sh10:13:000
149950,0migration/032151-21kthreadcore11:26:030
149950,0migration/029636-21kthreadcore09:31:020
149950,0migration/028414-21kthreadcore08:46:010
149950,0migration/02710-21kernelversion12:06:050
149950,0migration/025107-21kthreadcore08:21:030
149950,0migration/023244-21kthreadcore07:56:040
149950,0migration/022506-21runrttasks10:21:180
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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