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2025-12-24 - 04:53
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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 rack0slot2.osadl.org (updated Wed Dec 24, 2025 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40412092710,1sleep74041210-21sh19:24:147
400818125847,8sleep50-21swapper/519:08:585
3400222550,0sleep7340023-21tr23:34:377
400796425319,30sleep70-21swapper/719:05:567
400812224616,8sleep40-21swapper/419:08:094
4008500994438,5cyclictest4167051-21latency_hist20:29:137
400811524218,7sleep60-21swapper/619:08:036
4008490993735,2cyclictest4138056-21kworker/u16:0+flush-8:020:19:325
41418272360,1sleep50-21swapper/520:14:365
400850099350,34cyclictest4019508-21grep19:14:177
4008490993533,2cyclictest3741449-21kworker/u16:0+flush-8:019:24:435
4008490993533,2cyclictest254893-21kworker/u16:2+events_unbound23:44:075
4008490993533,2cyclictest177158-21kworker/u16:3+events_unbound22:39:275
4008490993533,2cyclictest156618-21kworker/u16:5+events_unbound22:54:285
4008490993432,2cyclictest371008-21kworker/u16:3+events_unbound23:54:305
4008490993331,2cyclictest177158-21kworker/u16:3+flush-8:022:29:135
4008490993331,2cyclictest156618-21kworker/u16:5+events_unbound23:04:285
4008490993331,2cyclictest156618-21kworker/u16:5+events_unbound23:04:285
4008490993230,2cyclictest41666-21kworker/u16:0+flush-8:021:04:435
4008490993229,2cyclictest4176905-21kworker/u16:2+events_unbound20:34:155
4008490993128,2cyclictest390298-21kworker/u16:1+flush-8:000:19:305
4008500993024,5cyclictest79970-21latency_hist21:24:137
4008490993028,2cyclictest41666-21kworker/u16:0+events_unbound21:34:135
4008490993028,2cyclictest41666-21kworker/u16:0+events_unbound21:34:135
4008490993028,2cyclictest371008-21kworker/u16:3+events_unbound00:34:305
4008490993027,2cyclictest41666-21kworker/u16:0+flush-8:021:19:145
4008490992927,2cyclictest80003-21kworker/u16:1+events_unbound22:04:325
4008490992926,2cyclictest69953-21kworker/u16:2+events_unbound21:24:275
4008490992826,2cyclictest3979249-21kworker/u16:3+events_unbound19:29:285
1944552280,1sleep50-21swapper/522:19:355
4008490992725,2cyclictest245020-21kworker/u16:0+events_unbound22:49:295
4008500992624,1cyclictest0-21swapper/719:09:367
4008500992624,1cyclictest0-21swapper/719:09:367
4008500992623,2cyclictest1267-21snmpd20:33:507
4008500992621,4cyclictest4108938-21latency_hist19:59:147
4008500992621,4cyclictest4108938-21latency_hist19:59:147
4008495992622,3cyclictest254893-21kworker/u16:2+flush-8:023:24:396
4008490992624,2cyclictest390298-21kworker/u16:1+events_unbound00:14:265
4008490992624,2cyclictest254893-21kworker/u16:2+flush-8:022:59:465
4008490992624,2cyclictest20958-21kworker/u16:3+events_unbound21:14:275
4346772250,1chrt741rcuc/500:24:355
412742250,1chrt41271-21crond21:04:137
4008500992524,0cyclictest0-21swapper/700:22:237
4008500992519,5cyclictest273916-21latency_hist23:04:137
4008490992523,2cyclictest4161742-21kworker/u16:1+events_unbound20:49:395
4008490992523,2cyclictest379341-21kworker/u16:4+events_unbound00:04:285
4008490992422,2cyclictest4161742-21kworker/u16:1+events_unbound21:12:315
4008490992421,2cyclictest4041396-21kworker/u16:4+events_unbound20:54:235
3857432240,1chrt0-21swapper/523:59:355
4008500992320,2cyclictest236267-21fw_packets22:44:287
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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