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2025-12-08 - 22:16
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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 Dec 08, 2025 12:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
368331999988,8cyclictest371493-21latency_hist07:20:010
368331998983,4cyclictest374697-21kworker/u8:0+events_unbound07:40:240
368331998579,4cyclictest374697-21kworker/u8:0+events_unbound07:50:230
368331998377,4cyclictest374697-21kworker/u8:0+events_unbound07:45:240
368331998170,9cyclictest400554-21cat08:50:000
368331998070,8cyclictest456949-21/usr/sbin/munin11:45:240
368331997969,7cyclictest446834-21latency_hist11:15:010
368332997867,8cyclictest437295-21latency_hist10:45:011
368331997772,4cyclictest452481-21kworker/u8:2+events_unbound11:55:010
368332997264,6cyclictest389040-21kworker/u8:3+flush-179:009:00:261
368331997265,5cyclictest467898-21kworker/u8:1+flush-179:012:20:270
368331997263,7cyclictest440466-21latency_hist10:55:010
368332997168,2cyclictest374697-21kworker/u8:0+flush-179:007:40:011
368332997160,8cyclictest448700-21latency_hist11:20:011
368331997165,3cyclictest426180-21kworker/u8:1+flush-179:010:10:250
368331997062,6cyclictest374697-21kworker/u8:0+flush-179:007:35:240
368331996963,4cyclictest368232-21kworker/u8:1+flush-179:007:30:250
368332996762,4cyclictest435948-21kworker/u8:0+flush-179:010:45:261
368331996761,4cyclictest389040-21kworker/u8:3+flush-179:009:00:210
368331996757,8cyclictest453478-21apt-get11:34:110
368331996558,5cyclictest422926-21kworker/u8:2+events_unbound10:05:000
368341996457,5cyclictest410226-21turbostat09:20:013
368331996456,6cyclictest467265-21kworker/u8:0+flush-179:012:35:210
368331996355,6cyclictest400651-21kworker/u8:0+flush-179:008:55:220
368331996353,7cyclictest389006-21latency_hist08:15:000
368331996353,7cyclictest389006-21latency_hist08:15:000
368332996253,7cyclictest450290-21latency_hist11:25:021
368332996253,7cyclictest424559-21latency_hist10:05:001
368331996256,5cyclictest389040-21kworker/u8:3+events_unbound08:25:120
368331996256,4cyclictest447329-21kworker/u8:1+flush-179:011:25:260
368331996255,4cyclictest447637-21diskstats11:15:150
36833199611,58cyclictest384284-21munin-run08:00:000
368332996052,6cyclictest438108-21kworker/u8:1+events_unbound11:00:001
368331996053,4cyclictest418724-21kworker/u8:1+flush-179:009:50:150
368341995957,1cyclictest0-21swapper/311:04:593
368332995953,4cyclictest434136-21kworker/u8:1+flush-179:010:40:001
368332995950,7cyclictest407579-21kworker/u8:0+flush-179:009:40:001
368331995951,6cyclictest452481-21kworker/u8:2+flush-179:011:55:260
368332995849,7cyclictest467898-21kworker/u8:1+flush-179:012:25:011
368331995853,4cyclictest418431-21/usr/sbin/munin09:45:240
368331995852,4cyclictest418724-21kworker/u8:1+flush-179:009:55:140
368331995850,6cyclictest452481-21kworker/u8:2+flush-179:011:39:590
368332995745,9cyclictest392202-21latency_hist08:25:001
36833199571,54cyclictest435746-21munin-run10:40:010
368332995650,4cyclictest447329-21kworker/u8:1+flush-179:011:30:001
368332995645,8cyclictest466510-21apt-get12:15:121
368331995647,5cyclictest422970-21kworker/u8:3+events_unbound10:30:000
368331995647,5cyclictest422970-21kworker/u8:3+events_unbound10:30:000
368332995551,3cyclictest425499-21kworker/u8:0+flush-179:010:10:001
368332995549,4cyclictest426180-21kworker/u8:1+flush-179:010:10:221
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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