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2026-04-27 - 16:34
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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 highest latencies:
System rackeslot6.osadl.org (updated Mon Apr 27, 2026 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
22436199910294,6cyclictest2306060-21kworker/u8:2+events_unbound10:50:010
2243619999888,8cyclictest2296850-21latency_hist09:55:010
2243622999788,7cyclictest2292091-21latency_hist09:40:011
2243619999182,7cyclictest2272986-21latency_hist08:40:010
2243622998878,7cyclictest2284113-21latency_hist09:15:011
2243622998877,9cyclictest1213033-21systemd-journal09:05:001
2243619998863,9cyclictest2336104-21latency_hist11:55:010
2243619998680,5cyclictest2306060-21kworker/u8:2+events_unbound10:50:250
2243619998576,6cyclictest2271377-21latency_hist08:35:010
2243622998373,7cyclictest2339559-21latency_hist12:05:011
2243619998174,5cyclictest2251711-21kworker/u8:0+events_unbound07:35:230
2243619998173,5cyclictest2309895-21kworker/u8:3+flush-179:011:25:000
2243619998072,6cyclictest2268201-21latency_hist08:25:010
2243619997972,5cyclictest2255205-21latency_hist07:45:010
2243619997972,5cyclictest2255205-21latency_hist07:45:000
2243619997972,5cyclictest2250138-21latency_hist07:30:000
2243619997868,8cyclictest2263673-21apt-get08:10:110
2243619997768,6cyclictest2338226-21apt-get12:00:120
224362499740,72cyclictest0-21swapper/211:43:592
2243622997467,5cyclictest2246667-21kworker/u8:1+flush-179:007:25:241
2243619997463,9cyclictest2261583-21apt-get08:05:000
2243619997463,9cyclictest2261583-21apt-get08:05:000
2243622997249,21cyclictest2293678-21latency_hist09:45:011
2243619997266,4cyclictest2282784-21kworker/u8:0+events_unbound09:35:190
2243622997162,7cyclictest2318339-21apt-get11:00:121
2243622997159,9cyclictest2301643-21apt-get10:10:001
2243622997149,19cyclictest2347776-21latency_hist12:30:011
2243622997148,20cyclictest2258376-21latency_hist07:55:011
2243619997160,9cyclictest2292347-21apt-get09:40:120
2243622997064,4cyclictest2277743-21latency_hist08:55:011
2243622997062,6cyclictest2245099-21latency_hist07:15:011
2243619997064,4cyclictest2251711-21kworker/u8:0+events_unbound07:45:120
2243619997062,6cyclictest2348031-21apt-get12:30:100
2243619997060,7cyclictest2243484-21latency_hist07:10:020
2243622996857,9cyclictest1213033-21systemd-journal11:20:001
2243619996863,4cyclictest2331301-21kworker/u8:1+events_unbound11:50:020
2243622996757,8cyclictest2268236-21kworker/u8:3+flush-179:008:55:181
2243622996757,7cyclictest2303480-21latency_hist10:15:011
2243619996660,4cyclictest2265260-21apt-get08:15:120
2243619996654,10cyclictest2289152-21apt-get09:30:100
2243622996559,4cyclictest2285727-21latency_hist09:20:011
2243619996458,5cyclictest2265040-21kworker/u8:0+flush-179:008:25:230
2243619996458,4cyclictest2282784-21kworker/u8:0+flush-179:009:25:160
2243622996354,7cyclictest2251726-21latency_hist07:35:021
2243619996355,6cyclictest2277778-21kworker/u8:1+flush-179:009:05:170
2243619996353,8cyclictest2322857-21apt-get11:15:000
2243622996255,5cyclictest2339615-21kworker/u8:1+flush-179:012:15:001
2243619996257,3cyclictest2306060-21kworker/u8:2+flush-179:010:25:170
2243619996256,4cyclictest2280976-21kworker/u8:2+flush-179:009:45:170
2243619996255,5cyclictest2298696-21kworker/u8:1+events_unbound10:15:240
2243619996252,7cyclictest2279360-21latency_hist09:00:010
2243622996155,4cyclictest2334773-21apt-get11:50:121
2243622996154,5cyclictest2326817-21apt-get11:25:121
2243622996151,8cyclictest2297105-21apt-get09:55:101
2243622996150,8cyclictest2336906-21diskstats11:55:161
2243619996158,2cyclictest0-21swapper/007:34:590
224361999611,57cyclictest1-21systemd09:56:420
2243622996053,4cyclictest2269788-21latency_hist08:30:011
2243622996051,7cyclictest2295263-21latency_hist09:50:011
2243619996055,4cyclictest2282784-21kworker/u8:0+events_unbound10:10:240
2243622995952,4cyclictest2331331-21latency_hist11:40:011
2243619995951,6cyclictest2346189-21latency_hist12:25:010
2243619995951,6cyclictest2328148-21latency_hist11:30:010
2243622995849,6cyclictest1213033-21systemd-journal10:31:431
2243619995846,9cyclictest2298696-21kworker/u8:1+events_unbound10:05:200
2243628995755,1cyclictest0-21swapper/311:57:593
2243622995748,7cyclictest2306060-21kworker/u8:2+flush-179:010:50:131
2243622995746,9cyclictest2253876-21apt-get07:40:111
2243622995746,9cyclictest2253876-21apt-get07:40:111
2243622995646,8cyclictest2305345-21apt-get10:20:111
2243622995642,12cyclictest2274582-21kworker/u8:2+flush-179:008:50:001
2243619995650,5cyclictest2309895-21kworker/u8:3+flush-179:011:30:150
2243619995649,5cyclictest2280976-21kworker/u8:2+flush-179:009:10:250
2243619995647,7cyclictest2280940-21latency_hist09:05:000
2243619995636,16cyclictest1213033-21systemd-journal10:56:430
2243622995545,8cyclictest2349617-21apt-get12:35:111
2243619995550,4cyclictest2309895-21kworker/u8:3+events_unbound11:40:220
2243619995541,10cyclictest510-21rs:main0
2243622995437,15cyclictest2282784-21kworker/u8:0+flush-179:010:00:201
2243619995449,4cyclictest2282784-21kworker/u8:0+flush-179:010:00:220
2243622995335,16cyclictest714-21Xorg08:02:001
2243622995335,16cyclictest714-21Xorg08:01:591
2243619995346,4cyclictest2248552-21latency_hist07:25:010
2243622995246,4cyclictest2346167-21kworker/u8:0+flush-179:012:30:151
2243622995243,7cyclictest2306060-21kworker/u8:2+flush-179:010:35:211
2243619995248,3cyclictest2336619-21apt-get11:55:110
2243622995144,4cyclictest2331301-21kworker/u8:1+flush-179:011:45:161
2243622995042,6cyclictest2309895-21kworker/u8:3+flush-179:011:20:211
2243622995035,14cyclictest0-21swapper/111:30:591
224362299501,5cyclictest2247059-21apt-config07:20:021
2243619995044,4cyclictest2306060-21kworker/u8:2+flush-179:010:40:150
2243619995037,10cyclictest1213033-21systemd-journal10:35:010
2243619995034,12cyclictest1213033-21systemd-journal11:40:000
4577091490,13ptp4l441ktimers/307:10:013
2243622994945,3cyclictest2306060-21kworker/u8:2+flush-179:010:45:191
2243622994943,5cyclictest2268236-21kworker/u8:3+flush-179:008:35:211
2243619994941,5cyclictest2268236-21kworker/u8:3+events_unbound08:40:150
224362299480,4cyclictest2323252-21apt-key11:15:001
2243619994843,4cyclictest2274582-21kworker/u8:2+flush-179:008:45:230
2243619994843,4cyclictest2261555-21kworker/u8:2+flush-179:008:05:140
2243619994843,4cyclictest2261555-21kworker/u8:2+flush-179:008:05:130
2243619994839,7cyclictest2246667-21kworker/u8:1+events_unbound07:50:260
2243622994745,1cyclictest0-21swapper/107:21:591
2243622994725,20cyclictest2267867-21switchtime08:20:241
2243619994741,4cyclictest2272956-21kworker/u8:0+flush-179:008:50:180
2243619994641,4cyclictest2346233-21kworker/u8:2+flush-179:012:35:150
2243622994526,17cyclictest2263673-21apt-get08:10:131
2243619994540,4cyclictest2336165-21kworker/u8:3+events_unbound12:15:130
2243619994539,5cyclictest2282784-21kworker/u8:0+flush-179:009:15:270
2243619994539,4cyclictest2308242-21kworker/u8:0+flush-179:010:30:240
2243619994538,5cyclictest2243469-21kworker/u8:0+flush-179:007:15:140
2243619994438,5cyclictest2336165-21kworker/u8:3+flush-179:012:05:140
2243622994236,4cyclictest2251711-21kworker/u8:0+flush-179:007:45:161
2243619994214,1cyclictest0-21swapper/012:13:590
2243628994134,5cyclictest2288908-21turbostat09:30:003
224362899410,40cyclictest0-21swapper/311:06:593
2243622994137,3cyclictest2263456-21systemd-run08:10:001
2243622994137,3cyclictest2263456-21systemd-run08:10:001
2243622994131,8cyclictest2258635-21apt-get07:55:121
2243619994136,4cyclictest2309895-21kworker/u8:3+events_unbound11:10:000
2243619994136,4cyclictest2246667-21kworker/u8:1+flush-179:007:55:250
224362499400,2cyclictest0-21swapper/208:46:592
2243622994033,5cyclictest2336165-21kworker/u8:3+events_unbound12:20:151
2243619994035,4cyclictest2298696-21kworker/u8:1+flush-179:010:20:150
2243619994035,3cyclictest2347778-21munin-run12:30:010
2243624993936,2cyclictest0-21swapper/211:38:592
2243622993934,3cyclictest2290522-21systemd-run09:35:001
224362299390,2cyclictest2319928-21apt-get11:05:131
2243619993935,2cyclictest2309895-21kworker/u8:3+events_unbound11:00:190
2243624993836,1cyclictest0-21swapper/209:20:002
224362499380,36cyclictest0-21swapper/210:49:002
224362499380,36cyclictest0-21swapper/210:21:592
2243628993735,1cyclictest0-21swapper/308:11:583
2243628993735,1cyclictest0-21swapper/307:59:553
224362899370,36cyclictest0-21swapper/307:53:593
2243624993734,2cyclictest0-21swapper/209:54:562
2243624993734,2cyclictest0-21swapper/209:46:592
2243622993734,2cyclictest0-21swapper/107:36:001
2243622993730,5cyclictest2282527-21latency_hist09:10:011
2243622993728,7cyclictest2284158-21kworker/u8:3+flush-179:009:20:151
224362299372,31cyclictest2306931-21apt-get10:25:151
2243628993631,2cyclictest0-21swapper/307:34:593
224362899360,35cyclictest0-21swapper/312:39:593
224362899360,35cyclictest0-21swapper/308:43:593
2243624993633,2cyclictest0-21swapper/211:22:592
2243624993633,2cyclictest0-21swapper/209:41:592
2243624993633,2cyclictest0-21swapper/208:16:592
224362499360,1cyclictest0-21swapper/210:26:592
2243622993631,3cyclictest2266597-21systemctl08:20:001
2243628993533,1cyclictest0-21swapper/312:34:553
2243628993533,1cyclictest0-21swapper/311:03:593
2243624993533,1cyclictest0-21swapper/212:19:592
2243624993533,1cyclictest0-21swapper/207:45:002
2243624993533,1cyclictest0-21swapper/207:44:592
2243624993532,2cyclictest0-21swapper/210:36:592
2243624993532,2cyclictest0-21swapper/208:57:592
224362499350,1cyclictest0-21swapper/208:10:002
224362499350,1cyclictest0-21swapper/208:09:592
2243622993532,2cyclictest2288917-21perf09:30:001
2243628993432,1cyclictest0-21swapper/312:16:593
2243628993432,1cyclictest0-21swapper/308:21:003
2243628993428,4cyclictest2271391-21turbostat08:35:003
2243628993427,5cyclictest2269806-21turbostat08:30:003
2243624993432,1cyclictest0-21swapper/208:39:582
2243624993431,2cyclictest0-21swapper/212:34:592
2243624993431,2cyclictest0-21swapper/208:41:592
2243624993431,2cyclictest0-21swapper/208:28:002
2243624993431,2cyclictest0-21swapper/207:26:002
2243622993429,4cyclictest2274234-21switchtime08:40:251
2243622993428,4cyclictest2243716-21latency_hist07:10:011
224362299342,3cyclictest2340074-21apt-get12:05:121
2243619993429,4cyclictest2243469-21kworker/u8:0+flush-179:007:15:000
4577091330,2ptp4l441ktimers/307:20:043
2243628993331,1cyclictest0-21swapper/309:59:563
2243628993331,1cyclictest0-21swapper/307:39:553
2243628993330,2cyclictest0-21swapper/312:12:593
2243628993328,4cyclictest2324716-21turbostat11:20:013
2243628993325,6cyclictest2300059-21turbostat10:05:003
2243624993330,2cyclictest0-21swapper/211:17:002
2243622993329,3cyclictest2298696-21kworker/u8:1+flush-179:010:18:471
4577091320,5ptp4l61490irq/134-eno1-TxRx-010:35:003
2243628993230,1cyclictest0-21swapper/309:06:593
2243628993229,2cyclictest0-21swapper/310:53:593
2243628993225,5cyclictest2308282-21turbostat10:29:593
2243624993229,2cyclictest0-21swapper/209:30:592
2243624993229,2cyclictest0-21swapper/207:15:582
2243622993227,4cyclictest2306060-21kworker/u8:2+flush-179:010:40:261
2243622993226,4cyclictest2332909-21kworker/u8:0+flush-179:011:45:011
2243622993224,6cyclictest2280976-21kworker/u8:2+flush-179:009:51:001
2243622993222,8cyclictest2316231-21apt-get10:55:011
2243619993227,4cyclictest2282784-21kworker/u8:0+events_unbound09:20:200
4577091310,7ptp4l441ktimers/309:35:013
4577091310,5ptp4l441ktimers/311:29:573
2243628993129,1cyclictest0-21swapper/310:14:553
2243628993124,5cyclictest2296860-21turbostat09:55:013
2243624993128,2cyclictest0-21swapper/208:53:582
224362299311,28cyclictest714-21Xorg08:34:001
4577091300,7ptp4l441ktimers/310:45:003
2243628993028,1cyclictest0-21swapper/307:29:543
2243628993027,2cyclictest0-21swapper/308:50:153
2243628993027,2cyclictest0-21swapper/308:45:143
224362899300,1cyclictest0-21swapper/309:11:593
2243624993027,2cyclictest0-21swapper/212:00:122
2243624993027,2cyclictest0-21swapper/207:35:022
224362499300,28cyclictest0-21swapper/210:30:112
2243622993025,4cyclictest0-21swapper/112:20:011
4577091290,7ptp4l441ktimers/312:30:013
4577091290,7ptp4l441ktimers/310:25:003
4577091290,7ptp4l441ktimers/309:00:023
4577091290,7ptp4l441ktimers/307:15:003
4577091290,6ptp4l441ktimers/310:10:003
2243628992927,1cyclictest0-21swapper/310:45:593
2243628992927,1cyclictest0-21swapper/309:15:593
2243628992927,1cyclictest0-21swapper/307:45:123
2243628992926,2cyclictest0-21swapper/311:20:583
2243628992923,4cyclictest2246693-21turbostat07:20:003
224362899290,27cyclictest0-21swapper/312:05:013
224362899290,27cyclictest0-21swapper/311:55:013
224362899290,27cyclictest0-21swapper/311:30:143
224362899290,1cyclictest0-21swapper/312:20:133
2243624992926,2cyclictest0-21swapper/211:12:592
2243624992926,2cyclictest0-21swapper/210:55:032
2243624992926,2cyclictest0-21swapper/209:58:582
224362499290,2cyclictest0-21swapper/208:05:012
224362499290,2cyclictest0-21swapper/208:05:012
224362499290,28cyclictest0-21swapper/209:10:142
224362499290,27cyclictest0-21swapper/211:45:132
224362499290,27cyclictest0-21swapper/209:20:132
224362499290,27cyclictest0-21swapper/207:20:032
4577091280,7ptp4l441ktimers/308:05:003
4577091280,7ptp4l441ktimers/308:05:003
2243628992825,2cyclictest0-21swapper/309:30:123
224362899280,26cyclictest0-21swapper/311:40:583
224362899280,21cyclictest0-21swapper/309:45:133
2243624992825,2cyclictest0-21swapper/210:10:122
224362499280,26cyclictest0-21swapper/211:55:032
224362499280,26cyclictest0-21swapper/207:30:112
4577091270,6ptp4l61490irq/134-eno1-TxRx-009:44:563
4577091270,6ptp4l61490irq/134-eno1-TxRx-007:45:003
4577091270,6ptp4l61490irq/134-eno1-TxRx-007:44:593
4577091270,5ptp4l441ktimers/310:40:013
4577091270,5ptp4l441ktimers/308:39:553
2243628992725,1cyclictest0-21swapper/309:23:593
224362899270,26cyclictest0-21swapper/308:15:143
224362899270,26cyclictest0-21swapper/308:05:043
224362899270,26cyclictest0-21swapper/308:05:033
224362899270,1cyclictest0-21swapper/312:05:023
2243624992724,2cyclictest0-21swapper/211:32:002
2243624992724,2cyclictest0-21swapper/208:10:582
2243624992724,2cyclictest0-21swapper/207:50:592
2243624992724,2cyclictest0-21swapper/207:14:592
224362499270,26cyclictest0-21swapper/208:30:132
224362499270,24cyclictest0-21swapper/208:25:002
4577091260,7ptp4l61490irq/134-eno1-TxRx-011:00:013
4577091260,6ptp4l61490irq/134-eno1-TxRx-011:50:013
4577091260,6ptp4l61490irq/134-eno1-TxRx-011:15:003
4577091260,6ptp4l441ktimers/311:40:003
4577091260,5ptp4l61490irq/134-eno1-TxRx-010:19:563
2243624992623,2cyclictest0-21swapper/211:01:002
2243624992623,2cyclictest0-21swapper/210:51:582
2243624992623,2cyclictest0-21swapper/210:40:592
224362499260,24cyclictest0-21swapper/212:25:122
2243624992522,2cyclictest0-21swapper/210:05:152
2243624992522,2cyclictest0-21swapper/207:59:552
224362499250,24cyclictest0-21swapper/211:53:592
224362499250,24cyclictest0-21swapper/211:28:592
2243624992421,2cyclictest0-21swapper/210:20:002
224362499240,1cyclictest0-21swapper/212:39:592
2243628992321,1cyclictest0-21swapper/309:03:593
2243624992219,2cyclictest0-21swapper/212:22:582
2243624992219,2cyclictest0-21swapper/209:27:592
2243624992118,2cyclictest0-21swapper/210:00:132
2243624992118,2cyclictest0-21swapper/209:06:592
2243624992017,2cyclictest0-21swapper/212:07:582
2243624991714,2cyclictest0-21swapper/212:12:002
2243624991513,1cyclictest0-21swapper/207:45:122
2243624991310,2cyclictest0-21swapper/209:38:592
22436249997,1cyclictest0-21swapper/211:05:122
22436249963,2cyclictest0-21swapper/209:04:062
22436249940,2cyclictest0-21swapper/207:10:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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