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2026-07-03 - 00:24
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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 Jul 02, 2026 12:44:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
262557199132122,8cyclictest2635497-21kworker/u8:0+flush-179:008:55:011
262557199127115,9cyclictest2723126-21kworker/u8:0+flush-179:012:20:001
262556699124117,5cyclictest2710614-21kworker/u8:3+flush-179:011:40:020
262557199119110,6cyclictest2635497-21kworker/u8:0+events_unbound08:20:211
262557199118102,7cyclictest2608238-21kworker/u8:3+flush-179:007:20:011
262557199117100,7cyclictest2650122-21kworker/u8:1+events_unbound08:50:001
262557199116109,4cyclictest2705310-21latency_hist11:15:011
26255719911499,5cyclictest2628686-21kworker/u8:0+events_unbound07:20:241
262556699114103,8cyclictest2663141-21latency_hist09:05:020
262557199112101,8cyclictest2645103-21latency_hist08:10:001
26255669911099,8cyclictest1213033-21systemd-journal08:20:010
26255669911099,8cyclictest1213033-21systemd-journal08:20:010
262557199109100,6cyclictest2682299-21kworker/u8:3+events_unbound10:10:001
26255719910693,9cyclictest2715800-21kworker/u8:2+flush-179:011:50:211
26255669910698,6cyclictest2630238-21latency_hist07:25:010
26255719910599,3cyclictest2723126-21kworker/u8:0+flush-179:012:25:251
26255719910592,5cyclictest2677444-21kworker/u8:1+events_unbound09:50:021
26255719910497,5cyclictest2658395-21kworker/u8:3+events_unbound09:20:011
26255719910492,8cyclictest2667895-21kworker/u8:1+flush-179:009:30:131
26255719910390,10cyclictest2656516-21latency_hist08:45:021
26255719910383,17cyclictest2706922-21apt-get11:20:011
26255719910194,5cyclictest2674331-21kworker/u8:2+flush-179:010:10:191
26255719910093,5cyclictest2658395-21kworker/u8:3+events_unbound09:15:011
26255719910091,6cyclictest2701914-21kworker/u8:0+events_unbound11:30:141
26255719910083,5cyclictest2650122-21kworker/u8:1+events_unbound08:25:211
2625571999989,8cyclictest2728121-21kworker/u8:2+events_unbound12:40:001
2625566999994,4cyclictest2635497-21kworker/u8:0+flush-179:008:40:260
2625566999889,6cyclictest2728138-21latency_hist12:25:010
2625571999791,4cyclictest2635497-21kworker/u8:0+flush-179:009:00:161
2625571999787,8cyclictest2674331-21kworker/u8:2+flush-179:009:45:011
2625571999688,6cyclictest2719881-21kworker/u8:2+flush-179:012:10:001
2625571999588,5cyclictest2635497-21kworker/u8:0+flush-179:008:30:211
2625571999585,6cyclictest2689129-21kworker/u8:1+events_unbound11:00:001
2625571999582,9cyclictest2698662-21kworker/u8:2+flush-179:011:05:201
2625571999576,7cyclictest2715800-21kworker/u8:2+flush-179:011:45:241
2625571999485,7cyclictest2658395-21kworker/u8:3+events_unbound09:40:001
2625571999284,5cyclictest2633651-21kworker/u8:3+flush-179:007:40:211
2625571999283,6cyclictest2641897-21kworker/u8:3+flush-179:008:00:221
2625571999182,6cyclictest2641897-21kworker/u8:3+flush-179:008:15:211
2625571999182,6cyclictest2641897-21kworker/u8:3+flush-179:008:15:211
2625571999083,4cyclictest2633651-21kworker/u8:3+events_unbound07:35:231
2625571999076,10cyclictest2646689-21latency_hist08:15:011
2625571999076,10cyclictest2646689-21latency_hist08:15:011
2625566999081,6cyclictest2723126-21kworker/u8:0+flush-179:012:30:150
2625566999081,6cyclictest2723126-21kworker/u8:0+flush-179:012:30:150
2625571998982,4cyclictest2728121-21kworker/u8:2+events_unbound12:35:001
2625571998982,4cyclictest2728121-21kworker/u8:2+events_unbound12:35:001
2625571998979,8cyclictest2667895-21kworker/u8:1+flush-179:009:30:011
2625571998974,5cyclictest2679032-21kworker/u8:0+flush-179:010:15:201
2625571998884,3cyclictest2718287-21kworker/u8:1+flush-179:012:00:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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