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2026-08-22 - 21:25
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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 Aug 22, 2026 12:44:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
250942899157148,5cyclictest2586956-21kworker/u8:2+flush-179:011:15:010
250942999143133,7cyclictest2545796-21kworker/u8:0+flush-179:009:05:251
250942999141131,7cyclictest2538359-21latency_hist08:40:011
250942999138121,14cyclictest2552725-21kworker/u8:3+flush-179:009:40:011
250942999137131,4cyclictest2565727-21kworker/u8:4+events_unbound10:15:011
250942999137127,8cyclictest2573886-21kworker/u8:0+events_unbound10:45:001
250942999137126,8cyclictest2522171-21latency_hist07:50:011
250942999137126,8cyclictest2522171-21latency_hist07:50:011
250942999129119,7cyclictest2585067-21apt-get11:04:591
250942999125116,6cyclictest2548145-21kworker/u8:1+events_unbound09:44:591
250942999125113,10cyclictest2506279-21kworker/u8:2+flush-179:007:20:211
250942999125113,10cyclictest2506279-21kworker/u8:2+flush-179:007:20:211
250942899124113,8cyclictest2590106-21latency_hist11:20:020
250942899124113,8cyclictest2590106-21latency_hist11:20:010
250942999122111,8cyclictest2537287-21kworker/u8:1+flush-179:008:45:191
250942899122114,5cyclictest2581662-21kworker/u8:3+events_unbound11:05:010
250942899121114,4cyclictest2560362-21kworker/u8:2+events_unbound09:55:010
250942899120111,6cyclictest2548145-21kworker/u8:1+flush-179:009:30:240
250942899120110,8cyclictest2514759-21kworker/u8:0+events_unbound07:35:000
250942999118111,5cyclictest2573886-21kworker/u8:0+events_unbound10:50:161
250942999117104,11cyclictest2603646-21kworker/u8:3+flush-179:012:35:241
250942899116106,8cyclictest2532234-21/usr/sbin/munin08:20:230
250942999115109,4cyclictest2586956-21kworker/u8:2+events_unbound11:15:151
250942999115109,4cyclictest2586956-21kworker/u8:2+events_unbound11:15:151
250942999114106,6cyclictest2514759-21kworker/u8:0+flush-179:007:45:001
250942899114108,4cyclictest2548145-21kworker/u8:1+events_unbound09:10:240
250942999113106,4cyclictest2560362-21kworker/u8:2+events_unbound09:50:011
250942999113103,7cyclictest2543126-21latency_hist08:55:011
250942899113107,4cyclictest2555858-21kworker/u8:0+events_unbound09:40:260
250942899113106,5cyclictest2591725-21kworker/u8:1+events_unbound11:30:010
250942899113106,5cyclictest2569100-21kworker/u8:1+events_unbound10:20:220
250942899113106,4cyclictest2506279-21kworker/u8:2+events_unbound07:15:010
250942899112102,8cyclictest2560362-21kworker/u8:2+flush-179:010:00:010
250942999111100,8cyclictest2549751-21apt-get09:15:121
250942999111100,8cyclictest2549751-21apt-get09:15:121
25094299911099,8cyclictest2530139-21apt-get08:15:001
250942999110104,4cyclictest2599890-21kworker/u8:0+events_unbound11:55:251
25094289911098,9cyclictest2609481-21latency_hist12:20:020
250942899110103,5cyclictest2506279-21kworker/u8:2+flush-179:007:35:230
25094299910998,7cyclictest2560362-21kworker/u8:2+flush-179:009:55:241
250942999109103,4cyclictest2555858-21kworker/u8:0+flush-179:010:00:211
250942999109100,7cyclictest2573886-21kworker/u8:0+flush-179:010:40:011
25094289910999,7cyclictest2581662-21kworker/u8:3+events_unbound11:00:000
250942899109101,5cyclictest2523758-21latency_hist07:55:010
250942999108100,6cyclictest2569100-21kworker/u8:1+events_unbound10:25:261
250942999108100,6cyclictest2569100-21kworker/u8:1+events_unbound10:25:251
250942899108102,4cyclictest2535148-21kworker/u8:0+events_unbound08:35:010
250942899108102,4cyclictest2535148-21kworker/u8:0+events_unbound08:35:010
250942899108100,6cyclictest2514759-21kworker/u8:0+flush-179:007:55:150
250942899108100,5cyclictest2570435-21kworker/u8:2+flush-179:010:35:210
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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