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2025-12-11 - 13:47
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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 rackeslot6.osadl.org (updated Thu Dec 11, 2025 00:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31205459910089,3cyclictest3120485-21kworker/u8:3+events_unbound19:20:261
3120545999691,4cyclictest3185387-21kworker/u8:3+events_unbound22:30:251
3120545999488,4cyclictest3174292-21kworker/u8:1+events_unbound23:00:231
3120544999183,5cyclictest3159204-21kworker/u8:3+flush-179:021:35:260
3120545998983,5cyclictest3206867-21kworker/u8:0+events_unbound23:35:241
3120545998881,5cyclictest3203940-21kworker/u8:3+events_unbound23:30:221
3120545998780,5cyclictest3203940-21kworker/u8:3+flush-179:000:00:241
3120545998780,5cyclictest3155218-21kworker/u8:0+events_unbound21:10:241
3120544998678,5cyclictest3222865-21latency_hist00:25:010
3120544998574,7cyclictest3131843-21latency_hist19:45:010
3120545998479,4cyclictest3123607-21latency_hist19:20:021
3120545998469,5cyclictest3177174-21kworker/u8:2+events_unbound22:05:001
3120544998473,8cyclictest3157574-21latency_hist21:05:010
3120545998371,4cyclictest3152465-21kworker/u8:2+events_unbound20:55:231
3120545998265,5cyclictest3120485-21kworker/u8:3+events_unbound20:20:141
3120545998175,4cyclictest3120485-21kworker/u8:3+events_unbound19:35:021
3120545998074,4cyclictest3225343-21kworker/u8:0+flush-179:000:35:261
3120545998063,5cyclictest3174292-21kworker/u8:1+events_unbound22:50:151
3120545997962,4cyclictest3203940-21kworker/u8:3+events_unbound00:25:211
3120545997870,6cyclictest3131888-21kworker/u8:1+flush-179:019:55:011
3120545997772,4cyclictest3218074-21kworker/u8:0+flush-179:000:10:251
3120545997771,4cyclictest3174292-21kworker/u8:1+flush-179:022:35:201
3120545997767,7cyclictest3226099-21latency_hist00:35:011
3120544997769,5cyclictest3174292-21kworker/u8:1+flush-179:022:55:260
3120545997667,7cyclictest3168720-21latency_hist21:40:011
3120544997670,4cyclictest3140833-21kworker/u8:0+flush-179:020:40:000
3120550997563,10cyclictest3227708-21turbostat00:40:003
3120545997567,5cyclictest3155218-21kworker/u8:0+events_unbound21:00:151
3120544997565,7cyclictest3159204-21kworker/u8:3+flush-179:021:30:250
3120545997469,3cyclictest3170288-21kworker/u8:0+flush-179:021:50:011
3120544997460,11cyclictest3198143-21latency_hist23:10:010
3120545997364,7cyclictest3172188-21kworker/u8:2+events_unbound21:55:161
3120545997362,8cyclictest3130244-21latency_hist19:40:011
3120544997367,4cyclictest3118945-21kworker/u8:2+flush-179:019:20:000
3120544997362,8cyclictest3193101-21latency_hist22:55:010
3120544997266,4cyclictest3170288-21kworker/u8:0+events_unbound22:00:000
3120545997167,3cyclictest3120485-21kworker/u8:3+events_unbound20:45:151
3120545997163,5cyclictest3140833-21kworker/u8:0+events_unbound20:35:151
3120545997065,4cyclictest3203940-21kworker/u8:3+events_unbound23:55:231
3120545997065,4cyclictest3140833-21kworker/u8:0+flush-179:020:40:231
3120545997062,6cyclictest3203940-21kworker/u8:3+events_unbound23:25:211
3120545997062,6cyclictest3174292-21kworker/u8:1+events_unbound22:20:201
3120545996863,3cyclictest3170288-21kworker/u8:0+flush-179:022:25:161
3120545996862,3cyclictest3120485-21kworker/u8:3+events_unbound20:25:171
312054599680,2cyclictest723-21Xorg21:09:591
3120544996861,5cyclictest3183598-21kworker/u8:2+events_unbound22:40:120
3120544996861,5cyclictest3174292-21kworker/u8:1+flush-179:022:00:150
3120545996762,4cyclictest3120485-21kworker/u8:3+events_unbound19:10:231
3120545996660,4cyclictest3170288-21kworker/u8:0+events_unbound22:15:161
3120545996659,6cyclictest3155218-21kworker/u8:0+flush-179:021:15:201
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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