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2026-06-12 - 17:26
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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 Fri Jun 12, 2026 12:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
300767299139133,5cyclictest3065723-21kworker/u8:3+events_unbound11:00:000
300767299129119,7cyclictest3078463-21apt-get10:49:320
300767299119108,8cyclictest3036784-21latency_hist08:40:010
300767299117112,4cyclictest3044719-21kworker/u8:2+events_unbound09:45:000
300767299115106,6cyclictest3099556-21kworker/u8:3+flush-179:012:20:000
300767299114106,6cyclictest3072045-21kworker/u8:0+events_unbound10:35:010
300767299112106,4cyclictest3021865-21kworker/u8:2+flush-179:008:10:270
30076729911195,12cyclictest1213033-21systemd-journal08:00:010
300767299111107,3cyclictest3021865-21kworker/u8:2+flush-179:008:05:270
300767299111105,4cyclictest3019492-21kworker/u8:0+flush-179:007:45:250
30076729910998,8cyclictest3054280-21latency_hist09:35:010
300767299109102,5cyclictest3007510-21kworker/u8:0+events_unbound07:25:280
300767299109101,5cyclictest3072045-21kworker/u8:0+events_unbound10:45:010
300767299109100,6cyclictest3102700-21kworker/u8:1+events_unbound12:15:000
300767299108103,4cyclictest3044719-21kworker/u8:2+flush-179:009:25:250
300767299108102,4cyclictest3092232-21kworker/u8:0+events_unbound11:30:220
30076759910797,7cyclictest3112515-21latency_hist12:35:001
30076729910694,9cyclictest3044737-21latency_hist09:05:010
30076729910495,6cyclictest3063176-21kworker/u8:0+events_unbound10:05:140
30076759910291,8cyclictest3014190-21latency_hist07:30:021
30076729910197,3cyclictest3048904-21kworker/u8:3+flush-179:009:50:260
30076729910196,4cyclictest3065723-21kworker/u8:3+flush-179:010:35:250
30076729910189,9cyclictest3062515-21latency_hist10:00:010
30076729910088,8cyclictest3022408-21kworker/u8:3+flush-179:008:30:210
3007675999990,6cyclictest3041520-21kworker/u8:0+flush-179:009:10:001
3007672999892,4cyclictest3036741-21kworker/u8:1+flush-179:008:50:260
3007672999888,7cyclictest3039951-21latency_hist08:50:010
3007672999790,5cyclictest3097917-21kworker/u8:0+events_unbound12:05:010
3007672999691,4cyclictest3007510-21kworker/u8:0+events_unbound07:30:290
3007672999684,9cyclictest3084926-21kworker/u8:2+events_unbound11:25:180
3007672999588,5cyclictest3044719-21kworker/u8:2+events_unbound10:25:240
3007672999588,5cyclictest3044719-21kworker/u8:2+events_unbound10:25:230
3007672999585,7cyclictest3075514-21kworker/u8:1+events_unbound11:05:170
3007672999385,5cyclictest3007510-21kworker/u8:0+events_unbound07:35:020
3007672999384,6cyclictest3021865-21kworker/u8:2+flush-179:008:00:230
3007672999287,4cyclictest3092232-21kworker/u8:0+events_unbound11:35:240
3007672999287,4cyclictest3044719-21kworker/u8:2+events_unbound09:05:200
3007672999285,5cyclictest3083333-21kworker/u8:0+events_unbound11:10:150
3007672999274,14cyclictest1213033-21systemd-journal11:45:000
3007672999186,4cyclictest3044719-21kworker/u8:2+flush-179:009:35:190
3007672999186,3cyclictest3088182-21kworker/u8:1+flush-179:011:50:220
3007672999185,4cyclictest3065723-21kworker/u8:3+flush-179:011:00:220
3007672999179,9cyclictest3012349-21latency_hist07:25:010
3007675999080,7cyclictest3025625-21latency_hist08:05:011
3007672999083,4cyclictest3052729-21kworker/u8:0+flush-179:009:45:210
3007675998977,10cyclictest3093411-21apt-get11:35:101
3007672998985,3cyclictest3084978-21kworker/u8:3+events_unbound11:15:220
3007672998985,3cyclictest3084978-21kworker/u8:3+events_unbound11:15:210
3007672998985,3cyclictest3048904-21kworker/u8:3+events_unbound09:15:270
3007675998880,5cyclictest3048904-21kworker/u8:3+flush-179:009:20:261
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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