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2026-07-01 - 10:11
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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: 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 Wed Jul 01, 2026 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
277931499132126,4cyclictest2864606-21kworker/u8:2+events_unbound23:40:010
277931499120112,5cyclictest2825617-21kworker/u8:0+events_unbound21:35:230
277931699118108,7cyclictest2835410-21latency_hist22:05:011
277931499118104,10cyclictest1213033-21systemd-journal21:55:000
277931499116107,6cyclictest2832260-21kworker/u8:1+events_unbound23:04:590
277931499116106,7cyclictest2875034-21latency_hist00:10:000
277931499114109,4cyclictest2774636-21kworker/u8:1+events_unbound19:20:260
277931499114107,5cyclictest2868061-21kworker/u8:0+events_unbound00:25:240
277931499114105,6cyclictest2869647-21kworker/u8:3+events_unbound23:55:230
277931499113106,4cyclictest2811148-21kworker/u8:2+events_unbound20:55:240
27793149911199,8cyclictest2779202-21kworker/u8:3+events_unbound19:15:150
277931499109102,5cyclictest2787129-21kworker/u8:2+flush-179:020:00:240
277931499109100,6cyclictest2804907-21latency_hist20:30:010
27793149910895,9cyclictest2881389-21kworker/u8:1+events_unbound00:30:190
27793149910895,7cyclictest2858079-21kworker/u8:3+events_unbound23:15:170
277931499107102,4cyclictest2838623-21kworker/u8:2+events_unbound22:50:270
277931499107100,5cyclictest2774636-21kworker/u8:1+events_unbound19:45:010
277931499107100,4cyclictest2832260-21kworker/u8:1+flush-179:023:10:160
27793149910696,7cyclictest2806494-21latency_hist20:35:000
27793169910596,7cyclictest2795602-21kworker/u8:1+flush-179:020:15:001
27793149910496,5cyclictest2823692-21kworker/u8:3+events_unbound21:45:000
27793169910395,6cyclictest2779156-21latency_hist19:10:021
27793149910397,4cyclictest2817523-21kworker/u8:2+flush-179:021:10:210
27793169910295,4cyclictest1213033-21systemd-journal22:45:001
27793149910297,4cyclictest2832260-21kworker/u8:1+events_unbound22:55:240
27793149910291,7cyclictest2787129-21kworker/u8:2+events_unbound20:10:210
27793149910195,5cyclictest2871289-21kworker/u8:2+flush-179:000:00:240
27793149910094,4cyclictest2808070-21kworker/u8:0+flush-179:020:45:210
27793149910091,6cyclictest2808149-21kworker/u8:1+flush-179:021:30:250
2779316999884,12cyclictest2872920-21cupsd00:00:011
2779314999893,4cyclictest2832260-21kworker/u8:1+flush-179:023:25:240
2779314999784,6cyclictest2823692-21kworker/u8:3+events_unbound22:00:150
2779314999687,3cyclictest2832260-21kworker/u8:1+events_unbound22:35:240
2779314999686,6cyclictest2841809-21kworker/u8:0+events_unbound22:30:200
2779314999685,9cyclictest2816567-21apt-get21:05:140
2779316999485,6cyclictest2861411-21latency_hist23:25:011
2779314999483,4cyclictest2864606-21kworker/u8:2+events_unbound23:40:210
2779316999384,7cyclictest2774636-21kworker/u8:1+flush-179:019:25:251
2779314999388,4cyclictest2871289-21kworker/u8:2+events_unbound00:20:260
2779314999388,4cyclictest2774636-21kworker/u8:1+flush-179:019:50:260
2779314999383,7cyclictest2814961-21kworker/u8:0+events_unbound21:00:190
2779316999284,5cyclictest2808149-21kworker/u8:1+flush-179:021:25:201
2779316999280,10cyclictest2803576-21apt-get20:25:111
2779314999286,4cyclictest2823692-21kworker/u8:3+flush-179:022:15:200
2779314999186,3cyclictest2801117-21kworker/u8:0+events_unbound20:15:210
2779316999081,6cyclictest2871289-21kworker/u8:2+flush-179:000:30:171
2779316999075,10cyclictest2806476-21kworker/u8:2+flush-179:020:35:171
2779314998985,3cyclictest2832260-21kworker/u8:1+events_unbound22:10:240
2779314998983,5cyclictest2846791-21kworker/u8:0+flush-179:022:40:210
2779314998981,6cyclictest2774636-21kworker/u8:1+events_unbound19:30:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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