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2026-04-18 - 19:10
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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 Sat Apr 18, 2026 12:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2371173999186,4cyclictest2437511-21kworker/u8:3+events_unbound10:45:230
2371173999184,5cyclictest2434359-21latency_hist10:25:010
2371173998783,3cyclictest2451914-21kworker/u8:3+flush-179:011:34:550
2371173998782,4cyclictest2440709-21kworker/u8:1+events_unbound11:05:240
2371173998778,6cyclictest2403841-21latency_hist08:50:010
2371177998680,5cyclictest2440709-21kworker/u8:1+flush-179:011:24:561
2371177998678,6cyclictest2443898-21latency_hist10:55:011
2371177998578,5cyclictest2414993-21latency_hist09:25:021
2371173998577,6cyclictest2422949-21latency_hist09:50:020
2371177998171,4cyclictest2390620-21kworker/u8:2+events_unbound08:10:001
2371177998168,10cyclictest1213033-21systemd-journal08:32:551
2371173998176,4cyclictest2437511-21kworker/u8:3+events_unbound11:00:240
2371173998176,4cyclictest2437511-21kworker/u8:3+events_unbound11:00:240
2371173998176,4cyclictest2434912-21kworker/u8:2+flush-179:010:39:550
2371173998173,6cyclictest2419771-21latency_hist09:40:010
2371177998072,5cyclictest2388739-21latency_hist08:05:001
2371173998076,3cyclictest2422925-21kworker/u8:0+events_unbound10:14:560
2371173998075,4cyclictest2471198-21kworker/u8:2+events_unbound12:35:260
2371173998075,4cyclictest2447085-21kworker/u8:0+events_unbound11:50:240
2371173998070,7cyclictest2400704-21kworker/u8:3+flush-179:008:55:010
2371173998070,4cyclictest2447085-21kworker/u8:0+events_unbound11:35:250
2371177997857,10cyclictest2451914-21kworker/u8:3+flush-179:011:35:001
2371177997755,19cyclictest2397214-21latency_hist08:30:011
2371173997665,4cyclictest2387114-21kworker/u8:1+events_unbound08:20:240
2371177997568,5cyclictest2471198-21kworker/u8:2+flush-179:012:19:561
2371177997567,6cyclictest2451877-21latency_hist11:20:011
2371177997566,6cyclictest2462982-21kworker/u8:2+flush-179:012:09:551
2371173997570,4cyclictest2462982-21kworker/u8:2+events_unbound11:55:240
2371173997469,4cyclictest2400704-21kworker/u8:3+events_unbound09:05:450
237117399741,71cyclictest1-21systemd10:05:000
2371177997165,5cyclictest2440708-21kworker/u8:0+flush-179:010:45:001
2371177997062,6cyclictest2410210-21latency_hist09:10:011
2371173997066,3cyclictest2447085-21kworker/u8:0+events_unbound12:26:540
2371173997065,4cyclictest2451838-21kworker/u8:2+events_unbound11:18:570
2371173997065,4cyclictest2400704-21kworker/u8:3+events_unbound08:56:560
2371173996864,3cyclictest2400704-21kworker/u8:3+events_unbound08:40:230
2371173996864,3cyclictest2397744-21kworker/u8:1+flush-179:010:09:560
2371173996863,4cyclictest2434912-21kworker/u8:2+events_unbound10:30:240
2371173996863,4cyclictest2434912-21kworker/u8:2+events_unbound10:25:230
2371173996863,4cyclictest2400704-21kworker/u8:3+events_unbound09:27:560
2371177996761,4cyclictest2400704-21kworker/u8:3+flush-179:008:45:261
2371173996762,4cyclictest2447085-21kworker/u8:0+events_unbound12:07:550
2371173996762,4cyclictest2382352-21kworker/u8:3+events_unbound07:51:560
2371173996762,4cyclictest2364739-21kworker/u8:1+flush-179:007:30:560
2371173996761,5cyclictest2460379-21kworker/u8:1+flush-179:011:48:570
2371173996662,3cyclictest2440709-21kworker/u8:1+events_unbound10:55:220
2371173996661,4cyclictest2451914-21kworker/u8:3+events_unbound11:25:560
2371173996661,4cyclictest2412032-21kworker/u8:0+events_unbound09:20:240
2371173996661,4cyclictest2372643-21kworker/u8:2+events_unbound07:47:570
2371173996661,4cyclictest2372643-21kworker/u8:2+events_unbound07:47:570
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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