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2026-09-07 - 16:54
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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 Mon Sep 07, 2026 12:44:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
402609099162148,10cyclictest4067667-21latency_hist09:20:020
402609099162148,10cyclictest4067667-21latency_hist09:20:010
402609099157142,5cyclictest4014394-21kworker/u8:0+events_unbound07:10:020
402609099153141,5cyclictest4082485-21kworker/u8:2+events_unbound10:15:000
402609099153141,5cyclictest4082485-21kworker/u8:2+events_unbound10:15:000
402609099150138,8cyclictest4043793-21latency_hist08:05:000
402609099147140,5cyclictest4014394-21kworker/u8:0+flush-179:007:40:200
402609099147122,22cyclictest4059692-21latency_hist08:55:020
402609099146127,9cyclictest4105012-21kworker/u8:3+events_unbound11:20:010
402609399143135,6cyclictest4034246-21kworker/u8:3+events_unbound07:45:011
402609099141125,8cyclictest4125948-21kworker/u8:2+events_unbound12:24:590
402609099140130,6cyclictest4014394-21kworker/u8:0+events_unbound07:25:240
402609399139129,8cyclictest4075876-21latency_hist09:45:021
402609399135130,4cyclictest4042462-21kworker/u8:2+events_unbound08:15:251
402609099135121,10cyclictest1213033-21systemd-journal09:10:010
402609399134127,5cyclictest4064506-21kworker/u8:3+events_unbound09:20:011
402609399134127,5cyclictest4064506-21kworker/u8:3+events_unbound09:20:011
402609099134121,6cyclictest4040052-21kworker/u8:0+events_unbound08:30:180
402609399132125,4cyclictest4040052-21kworker/u8:0+events_unbound08:35:211
402609399132119,4cyclictest4085661-21kworker/u8:0+events_unbound10:55:191
402609099131124,4cyclictest4082501-21latency_hist10:05:010
402609399129116,10cyclictest4092050-21apt-get10:35:031
402609099129123,4cyclictest4076923-21kworker/u8:1+flush-179:009:55:220
402609099128122,4cyclictest4037969-21kworker/u8:1+flush-179:007:50:210
402609399127116,9cyclictest4064503-21true09:10:001
402609399127111,9cyclictest4111388-21kworker/u8:1+events_unbound11:40:001
402609099127121,4cyclictest4100304-21kworker/u8:2+flush-179:011:05:260
402609099126113,4cyclictest4085661-21kworker/u8:0+events_unbound11:05:000
402609099125118,4cyclictest4095728-21kworker/u8:1+flush-179:010:45:240
402609099124118,4cyclictest4074528-21kworker/u8:4+events_unbound09:40:230
402609099123112,8cyclictest4042462-21kworker/u8:2+flush-179:008:25:000
402609099123110,5cyclictest4074528-21kworker/u8:4+events_unbound09:45:210
402609399122117,4cyclictest4074251-21kworker/u8:0+flush-179:009:50:221
402609399122112,4cyclictest4023476-21kworker/u8:1+events_unbound07:15:251
402609099122115,5cyclictest4014394-21kworker/u8:0+events_unbound07:20:010
402609099122111,7cyclictest4105012-21kworker/u8:3+events_unbound11:30:180
402609399121115,4cyclictest4040052-21kworker/u8:0+flush-179:008:05:231
402609399120113,4cyclictest4085661-21kworker/u8:0+flush-179:011:10:251
402609099120108,9cyclictest1213033-21systemd-journal11:45:010
402609399119114,4cyclictest4014394-21kworker/u8:0+events_unbound07:39:591
402609099119113,4cyclictest4064506-21kworker/u8:3+flush-179:009:30:230
402609399118113,3cyclictest4023476-21kworker/u8:1+events_unbound07:30:241
402609399118112,4cyclictest4064449-21kworker/u8:2+events_unbound09:10:171
402609099118112,4cyclictest4037969-21kworker/u8:1+flush-179:007:50:000
402609099118107,8cyclictest4064506-21kworker/u8:3+events_unbound09:20:210
402609099118107,8cyclictest4064506-21kworker/u8:3+events_unbound09:20:200
402609099118106,9cyclictest4045378-21latency_hist08:10:010
402609399117111,4cyclictest4042462-21kworker/u8:2+flush-179:008:20:211
402609099117112,4cyclictest4040052-21kworker/u8:0+events_unbound09:00:240
402609099117102,5cyclictest4125045-21kworker/u8:1+events_unbound12:30:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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