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2026-08-14 - 07:00
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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 rack0slot2.osadl.org (updated Fri Aug 14, 2026 00:43:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
394721421000,1sleep73947215-21cut21:28:247
38953582970,1sleep73895357-21kthreadcore21:08:217
39099192950,0sleep50-21swapper/521:13:245
37023862550,1sleep60-21swapper/619:28:206
3654238995350,2cyclictest95917-21kworker/u16:1+flush-8:023:57:596
3654237995250,2cyclictest4066197-21kworker/u16:4+events_unbound22:28:265
3654237995048,2cyclictest4082868-21kworker/u16:0+flush-8:022:53:265
365380125040,7sleep40-21swapper/419:05:434
36493602431,31sleep70-21swapper/719:03:227
3654237994240,2cyclictest3784775-21kworker/u16:1+flush-8:022:08:155
3654237994239,2cyclictest4082868-21kworker/u16:0+events_unbound22:43:175
3654237994139,2cyclictest3961908-21kworker/u16:3+events_unbound21:38:285
3654243994036,3cyclictest3842883-21cat20:43:007
3654237994038,2cyclictest4066197-21kworker/u16:4+events_unbound22:23:315
3654237994038,2cyclictest3927118-21kworker/u16:2+events_unbound21:58:325
3654237994038,2cyclictest3813463-21kworker/u16:3+events_unbound20:28:305
3654237994038,2cyclictest3735800-21kworker/u16:2+events_unbound20:23:255
3654237994038,2cyclictest3687052-21kworker/u16:0+flush-8:019:53:245
3654237994038,2cyclictest3687052-21kworker/u16:0+events_unbound20:33:255
3654237994037,2cyclictest4154351-21kworker/u16:1+flush-8:022:58:175
3654237993937,2cyclictest4189803-21kworker/u16:1+events_unbound23:31:225
3654237993937,2cyclictest3882043-21kworker/u16:0+flush-8:021:03:255
3654237993937,2cyclictest3784775-21kworker/u16:1+events_unbound20:48:135
365390323929,7sleep50-21swapper/519:07:135
3654237993836,2cyclictest3813463-21kworker/u16:3+events_unbound21:23:295
3654243993735,1cyclictest3987796-21ssh21:47:597
3654237993735,2cyclictest3597852-21kworker/u16:4+flush-8:019:18:255
3654237993734,2cyclictest95917-21kworker/u16:1+events_unbound00:30:115
3654237993634,2cyclictest4189803-21kworker/u16:1+events_unbound23:35:385
3654237993634,2cyclictest4095189-21kworker/u16:1+events_unbound22:42:205
3654237993634,2cyclictest4025246-21kworker/u16:0+events_unbound22:04:265
3654237993533,2cyclictest82634-21kworker/u16:2+events_unbound00:05:145
3654237993533,2cyclictest4120832-21kworker/u16:2+flush-8:023:03:295
3654237993533,2cyclictest4082868-21kworker/u16:0+events_unbound23:45:425
3654237993533,2cyclictest4082868-21kworker/u16:0+events_unbound23:25:185
3654237993533,2cyclictest3986500-21kworker/u16:3+flush-8:022:18:275
3654237993533,2cyclictest3927118-21kworker/u16:2+events_unbound21:55:345
3654237993533,2cyclictest3784775-21kworker/u16:1+events_unbound21:44:145
3654237993533,2cyclictest3687052-21kworker/u16:0+events_unbound19:43:315
3654237993532,2cyclictest3735800-21kworker/u16:2+events_unbound20:13:145
3654243993433,0cyclictest0-21swapper/700:22:547
3654237993432,2cyclictest4082868-21kworker/u16:0+events_unbound22:49:075
3654237993432,2cyclictest4025246-21kworker/u16:0+events_unbound22:13:315
3654237993431,2cyclictest3813463-21kworker/u16:3+events_unbound20:58:135
3654237993331,2cyclictest83842-21kworker/u16:4+events_unbound23:50:195
3654237993331,2cyclictest4193048-21kworker/u16:3+events_unbound00:11:235
3654237993331,2cyclictest4082868-21kworker/u16:0+events_unbound23:17:025
3654237993331,2cyclictest4082868-21kworker/u16:0+events_unbound00:24:535
3654237993331,2cyclictest3986500-21kworker/u16:3+events_unbound22:37:335
3654237993331,2cyclictest3927118-21kworker/u16:2+events_unbound21:22:325
3654237993331,2cyclictest3735800-21kworker/u16:2+events_unbound20:22:035
3654237993330,3cyclictest4082868-21kworker/u16:0+flush-8:023:59:295
3654237993330,2cyclictest4193048-21kworker/u16:3+events_unbound00:13:155
467462320,1chrt46747-21sh23:31:517
365424399320,30cyclictest203881-21latency_hist00:37:597
3654237993230,2cyclictest95917-21kworker/u16:1+events_unbound00:37:315
3654237993230,2cyclictest4189803-21kworker/u16:1+events_unbound23:19:345
3654237993230,2cyclictest4189803-21kworker/u16:1+events_unbound23:12:505
3654237993230,2cyclictest3813463-21kworker/u16:3+flush-8:021:28:225
36537342328,7sleep60-21swapper/619:04:496
365424399310,29cyclictest4120344-21latency_hist22:42:597
3654237993129,2cyclictest4193048-21kworker/u16:3+flush-8:023:38:275
3654237993028,2cyclictest3711611-21kworker/u16:1+flush-8:019:33:285
3654237993028,2cyclictest3654460-21kworker/u16:3+flush-8:019:38:255
3654243992923,5cyclictest648-21systemd-journal19:47:597
3654237992927,2cyclictest3927118-21kworker/u16:2+events_unbound21:35:155
3654237992927,2cyclictest3813463-21kworker/u16:3+flush-8:020:43:145
3654237992927,2cyclictest3774594-21kworker/u16:3+flush-8:020:08:205
3654238992826,2cyclictest3986500-21kworker/u16:3+flush-8:021:52:356
3654238992826,2cyclictest3986500-21kworker/u16:3+flush-8:021:52:356
3654237992826,2cyclictest4082868-21kworker/u16:0+events_unbound00:21:065
3654237992826,2cyclictest3813463-21kworker/u16:3+events_unbound21:11:515
39967932270,1chrt3996792-21missed_timers21:48:287
39967932270,1chrt3996792-21missed_timers21:48:287
3654243992722,4cyclictest83423-21latency_hist23:47:597
3654237992725,2cyclictest95917-21kworker/u16:1+events_unbound23:55:205
3654243992625,0cyclictest0-21swapper/720:08:317
3654243992621,4cyclictest143682-21latency_hist00:12:597
3654237992624,2cyclictest3597852-21kworker/u16:4+flush-8:019:23:195
3654237992522,2cyclictest3687052-21kworker/u16:0+events_unbound19:58:035
3654237992422,2cyclictest3852841-21kworker/u16:4+events_unbound20:54:045
3654237992422,2cyclictest3784775-21kworker/u16:1+events_unbound20:42:115
3654237992422,2cyclictest3711611-21kworker/u16:1+flush-8:020:03:205
3654233992422,2cyclictest4189803-21kworker/u16:1+flush-8:023:38:254
3654233992321,2cyclictest3986500-21kworker/u16:3+flush-8:022:29:114
3654237992220,2cyclictest3654460-21kworker/u16:3+events_unbound19:09:145
3654243992118,2cyclictest155738-21latency_hist00:17:597
3654243992116,4cyclictest3927514-21latency_hist21:23:007
365424399210,19cyclictest180989-21ssh00:28:147
3654243992019,0cyclictest0-21swapper/700:07:397
3654243992016,3cyclictest4025111-21/usr/sbin/munin22:03:147
365424399200,18cyclictest12425-21cut23:18:147
3654237992018,2cyclictest3927118-21kworker/u16:2+events_unbound21:48:145
3654237992018,2cyclictest3927118-21kworker/u16:2+events_unbound21:48:145
3654237992018,2cyclictest3735800-21kworker/u16:2+flush-8:019:48:335
3654237992018,2cyclictest3654460-21kworker/u16:3+events_unbound19:28:195
3654237991917,2cyclictest3654460-21kworker/u16:3+events_unbound19:17:125
39799542170,0sleep60-21swapper/621:43:226
3654243991712,4cyclictest4023923-21latency_hist22:03:007
3654243991711,5cyclictest3963736-21latency_hist21:38:007
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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