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2023-09-24 - 00:11
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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: reduced 
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rackeslot8.osadl.org (updated Sat Sep 23, 2023 12:44:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2318140994239,2cyclictest2511118-21kworker/u8:1+flush-8:010:05:251
2318146994137,3cyclictest2270225-21kworker/u8:0+flush-8:009:40:253
2318136994137,3cyclictest2603992-21gpgv11:30:000
2318140994036,3cyclictest2270225-21kworker/u8:0+flush-8:007:55:261
2318140993835,2cyclictest2659252-21kworker/u8:3+flush-8:012:35:311
2318142993733,3cyclictest2312510-21kworker/u8:3+flush-8:007:20:012
2318140993733,3cyclictest2407393-21kworker/u8:2+flush-8:008:45:251
2318140993733,3cyclictest2270225-21kworker/u8:0+flush-8:007:55:011
2318136993731,4cyclictest2592652-21latency_hist11:20:000
2318136993731,4cyclictest2592652-21latency_hist11:20:000
2318140993632,3cyclictest2270225-21kworker/u8:0+flush-8:009:10:231
2318146993528,5cyclictest4170283-21systemd-journal12:30:003
2318140993531,3cyclictest2270225-21kworker/u8:0+flush-8:008:40:231
2318136993532,2cyclictest2270225-21kworker/u8:0+flush-8:008:40:000
2318146993430,3cyclictest2312510-21kworker/u8:3+flush-8:007:25:253
2318140993330,2cyclictest2543774-21kworker/u8:1+events_unbound11:20:011
2318140993330,2cyclictest2543774-21kworker/u8:1+events_unbound11:20:011
2318146993229,2cyclictest2576545-21kworker/u8:2+flush-8:012:30:273
2318146993229,2cyclictest2312510-21kworker/u8:3+events_unbound07:40:313
2318140993229,2cyclictest2270225-21kworker/u8:0+events_unbound09:45:301
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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