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2026-04-15 - 22:59
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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 Wed Apr 15, 2026 12:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2417098999584,8cyclictest2494509-21latency_hist11:10:010
2417098999181,7cyclictest2486040-21latency_hist10:45:010
2417098998576,7cyclictest2438006-21latency_hist08:15:010
2417098998573,9cyclictest266-21systemd-journal07:35:000
2417098998573,9cyclictest266-21systemd-journal07:35:000
2417101998476,6cyclictest2512026-21latency_hist12:05:011
2417101998472,11cyclictest2429824-21http07:50:011
2417101998275,5cyclictest2428205-21latency_hist07:45:011
2417098998169,10cyclictest2452608-21apt-get09:00:110
2417101998070,8cyclictest2473336-21kworker/u8:1+flush-179:010:20:001
2417098997869,6cyclictest2484439-21latency_hist10:40:010
2417098997869,6cyclictest2421807-21latency_hist07:25:010
2417098997566,7cyclictest2418611-21latency_hist07:15:000
2417101997264,6cyclictest2453939-21latency_hist09:05:011
2417101997156,13cyclictest2468246-21kworker/u8:1+flush-179:009:49:541
2417101997063,5cyclictest2496130-21kworker/u8:3+flush-179:012:00:001
2417101997063,5cyclictest2496130-21kworker/u8:3+flush-179:012:00:001
2417101997050,18cyclictest2475936-21kworker/u8:0+flush-179:010:15:011
2417101996960,7cyclictest2452361-21latency_hist09:00:011
2417101996960,6cyclictest2434814-21kworker/u8:2+flush-179:008:25:171
2417098996954,6cyclictest2454198-21apt-get09:05:120
2417101996553,8cyclictest266-21systemd-journal08:20:111
2417098996556,7cyclictest2468778-21apt-get09:50:110
2417101996455,7cyclictest2450743-21latency_hist08:55:011
2417101996454,8cyclictest2518635-21/usr/sbin/munin12:25:241
2417098996350,10cyclictest266-21systemd-journal10:25:000
2417101996255,5cyclictest2501422-21diskstats11:30:151
2417098996254,6cyclictest2523443-21latency_hist12:40:010
2417098996253,7cyclictest2439606-21latency_hist08:20:010
2417101996051,7cyclictest2434836-21latency_hist08:05:011
2417098996051,7cyclictest2428462-21apt-get07:45:130
2417101995954,4cyclictest2475936-21kworker/u8:0+flush-179:010:24:561
2417101995952,5cyclictest2409639-21kworker/u8:0+flush-179:007:30:201
2417101995952,5cyclictest2409639-21kworker/u8:0+flush-179:007:30:201
2417101995854,3cyclictest2429785-21kworker/u8:0+flush-179:008:10:251
2417101995849,7cyclictest2491575-21/usr/sbin/munin11:00:251
2417098995849,7cyclictest2429785-21kworker/u8:0+flush-179:007:55:230
2417101995651,4cyclictest2499325-21kworker/u8:1+flush-179:011:40:251
2417101995648,6cyclictest2434814-21kworker/u8:2+flush-179:008:15:221
2417101995646,8cyclictest2446021-21kworker/u8:0+flush-179:009:15:011
2417098995648,6cyclictest2474888-21latency_hist10:10:000
2417098995647,7cyclictest266-21systemd-journal12:30:000
2417101995546,7cyclictest2463533-21kworker/u8:3+events_unbound10:00:221
2417101995544,9cyclictest2479709-21kworker/u8:2+flush-179:010:40:231
2417098995546,6cyclictest2496095-21latency_hist11:15:000
2417098995441,11cyclictest2465108-21basename09:40:010
2417098995441,11cyclictest2465108-21basename09:40:000
2417101995346,5cyclictest2475936-21kworker/u8:0+events_unbound11:15:001
2417101995342,8cyclictest2475936-21kworker/u8:0+flush-179:010:33:111
2417098995344,7cyclictest2418847-21/usr/sbin/munin07:15:220
2417101995245,5cyclictest2473558-21apt-get10:05:101
2417098995244,6cyclictest2478070-21latency_hist10:20:020
2417101995135,13cyclictest2491079-21apt-get11:00:001
2417098995143,6cyclictest2487623-21latency_hist10:50:020
2417101995044,5cyclictest2475936-21kworker/u8:0+flush-179:010:28:121
2417101995037,9cyclictest2457162-21kworker/u8:1+events_unbound09:30:131
2417098995043,5cyclictest2429797-21apt-get07:50:020
2417098995039,9cyclictest266-21systemd-journal08:45:010
4577091490,13ptp4l61490irq/134-eno1-TxRx-007:09:553
2417101994943,5cyclictest2463533-21kworker/u8:3+flush-179:009:53:121
2417101994943,4cyclictest2487782-21sort10:50:021
2417101994942,5cyclictest2496130-21kworker/u8:3+flush-179:012:18:131
2417101994939,9cyclictest2522089-21apt-get12:35:111
2417098994933,14cyclictest2441202-21kworker/u8:1+flush-179:008:40:000
2417101994844,3cyclictest2475936-21kworker/u8:0+flush-179:011:05:251
2417101994843,4cyclictest2453988-21kworker/u8:2+events_unbound09:05:241
2417101994839,7cyclictest2409639-21kworker/u8:0+flush-179:007:20:001
2417101994838,8cyclictest2517064-21apt-get12:20:111
2417101994838,8cyclictest2517064-21apt-get12:20:111
2417101994838,7cyclictest266-21systemd-journal08:50:011
2417098994837,8cyclictest510-21rs:main0
2417101994741,4cyclictest2409639-21kworker/u8:0+events_unbound07:35:131
2417098994740,5cyclictest2476473-21latency_hist10:15:010
2417098994739,7cyclictest2497705-21sendmail-msp11:20:000
2417098994642,2cyclictest2504091-21perf11:40:010
2417098994639,5cyclictest2516799-21latency_hist12:20:010
241709899460,43cyclictest0-21swapper/012:00:590
2417101994539,5cyclictest2504109-21kworker/u8:2+events_unbound12:05:241
2417101994538,5cyclictest2441202-21kworker/u8:1+events_unbound08:40:001
2417101994533,11cyclictest2423428-21kworker/u8:2+flush-179:007:50:201
2417101994530,12cyclictest2453988-21kworker/u8:2+flush-179:009:20:111
2417098994537,5cyclictest2504109-21kworker/u8:2+flush-179:012:05:220
2417098994535,8cyclictest2429785-21kworker/u8:0+flush-179:008:00:230
241709899450,44cyclictest2436431-21idleruntime-cro08:10:000
2417101994439,4cyclictest2505896-21kworker/u8:0+flush-179:011:50:211
2417101994439,4cyclictest2434814-21kworker/u8:2+flush-179:008:30:221
2417101994435,7cyclictest2496332-21/usr/sbin/munin11:15:161
2417098994441,2cyclictest714-21Xorg07:44:590
2417098994438,4cyclictest2491376-21apt-key11:00:010
241710399430,41cyclictest0-21swapper/207:18:592
2417101994340,2cyclictest2417095-21cyclictest10:50:121
2417101994337,5cyclictest2479709-21kworker/u8:2+flush-179:010:35:221
2417101994337,4cyclictest2504076-21latency_hist11:40:001
2417098994340,2cyclictest0-21swapper/011:31:590
2417098994339,2cyclictest2471752-21systemd-run10:00:010
2417098994328,7cyclictest2479907-21/usr/sbin/munin10:25:220
241709899431,5cyclictest2449167-21idleruntime-cro08:50:000
241710799420,41cyclictest0-21swapper/307:22:593
2417098994239,2cyclictest211irq_work/007:27:590
2417098994234,6cyclictest2426606-21latency_hist07:40:010
2417098994233,6cyclictest2446021-21kworker/u8:0+flush-179:009:25:160
2417098994230,10cyclictest2441459-21apt-get08:25:120
2417101994134,5cyclictest2433247-21latency_hist08:00:011
2417101994132,7cyclictest2457368-21apt-get09:15:111
241710199410,39cyclictest2445991-21turbostat08:44:541
241709899416,33cyclictest0-21swapper/012:20:130
241709899416,33cyclictest0-21swapper/012:20:130
241709899411,38cyclictest714-21Xorg10:00:590
241710799400,38cyclictest2442800-21turbostat08:30:003
2417101994022,2cyclictest2420228-21perf07:24:551
241710199400,3cyclictest714-21Xorg09:38:591
241710199400,3cyclictest714-21Xorg09:38:591
2417098994029,8cyclictest266-21systemd-journal09:17:120
2417107993937,1cyclictest0-21swapper/307:25:593
2417101993934,4cyclictest2434814-21kworker/u8:2+flush-179:008:05:171
2417101993933,4cyclictest2453988-21kworker/u8:2+flush-179:009:40:201
2417101993932,6cyclictest266-21systemd-journal07:29:111
2417098993936,2cyclictest0-21swapper/011:56:580
2417098993936,2cyclictest0-21swapper/011:56:580
2417098993935,3cyclictest0-21swapper/011:25:000
2417098993930,7cyclictest2491076-21latency_hist11:00:010
2417103993834,2cyclictest0-21swapper/208:27:592
241710399380,36cyclictest0-21swapper/211:57:592
241710399380,36cyclictest0-21swapper/211:57:582
241710399380,36cyclictest0-21swapper/210:01:592
241710399380,36cyclictest0-21swapper/208:57:592
241710399380,35cyclictest0-21swapper/212:10:592
2417101993835,2cyclictest714-21Xorg12:14:591
2417101993832,4cyclictest2470095-21kworker/u8:0+flush-179:009:55:211
2417101993828,8cyclictest2475936-21kworker/u8:0+events_unbound11:20:141
2417107993734,2cyclictest0-21swapper/309:36:583
2417107993734,2cyclictest0-21swapper/309:36:583
2417107993734,2cyclictest0-21swapper/308:30:583
241710799370,36cyclictest0-21swapper/310:32:593
2417103993733,2cyclictest0-21swapper/209:16:002
241710399370,2cyclictest0-21swapper/210:53:002
2417101993731,4cyclictest2521717-21store12:35:011
2417098993728,7cyclictest266-21systemd-journal11:30:000
2417098993727,8cyclictest510-21rs:main0
2417107993634,1cyclictest0-21swapper/310:24:593
2417107993634,1cyclictest0-21swapper/310:14:553
2417107993634,1cyclictest0-21swapper/308:24:553
2417107993633,2cyclictest0-21swapper/311:44:553
2417107993631,4cyclictest2486048-21turbostat10:49:563
241710799360,35cyclictest0-21swapper/309:53:583
241710799360,35cyclictest0-21swapper/309:30:003
2417103993633,2cyclictest0-21swapper/210:09:552
2417103993633,2cyclictest0-21swapper/209:32:592
2417103993633,2cyclictest0-21swapper/208:19:552
241710399360,1cyclictest0-21swapper/211:21:592
241710399360,1cyclictest0-21swapper/210:17:592
241710399360,1cyclictest0-21swapper/209:02:002
2417101993628,5cyclictest2504109-21kworker/u8:2+flush-179:011:45:101
2417098993634,1cyclictest714-21Xorg09:22:580
2417107993533,1cyclictest0-21swapper/311:34:593
2417107993533,1cyclictest0-21swapper/310:19:563
241710799350,34cyclictest0-21swapper/310:02:593
241710799350,1cyclictest0-21swapper/312:09:563
2417103993533,1cyclictest0-21swapper/212:39:582
2417103993532,2cyclictest0-21swapper/211:48:592
2417103993531,2cyclictest0-21swapper/211:41:002
2417103993531,2cyclictest0-21swapper/207:30:592
2417103993531,2cyclictest0-21swapper/207:30:592
2417101993527,6cyclictest2496130-21kworker/u8:3+flush-179:011:28:121
2417098993526,7cyclictest2455762-21/usr/sbin/munin09:10:230
2417107993432,1cyclictest0-21swapper/311:09:563
2417107993432,1cyclictest0-21swapper/307:18:593
2417107993431,2cyclictest0-21swapper/307:42:593
2417098993424,8cyclictest2513663-21kworker/u8:0+flush-179:012:10:200
2417103993330,2cyclictest0-21swapper/210:14:592
2417103993329,2cyclictest0-21swapper/210:26:592
2417101993330,2cyclictest0-21swapper/109:30:001
2417098993330,2cyclictest2508835-21cron11:55:000
2417098993327,4cyclictest2449417-21http08:50:120
2417107993229,2cyclictest0-21swapper/311:14:583
2417103993228,2cyclictest0-21swapper/209:26:592
4577091310,6ptp4l441ktimers/307:35:003
4577091310,6ptp4l441ktimers/307:35:003
2417107993128,2cyclictest0-21swapper/309:02:003
2417107993126,4cyclictest2468276-21turbostat09:50:003
2417103993128,2cyclictest0-21swapper/210:30:582
2417103993128,2cyclictest0-21swapper/208:48:592
241709899318,5cyclictest2507147-21unixbench_multi11:45:240
2417098993126,4cyclictest2434814-21kworker/u8:2+flush-179:008:30:000
2417098993123,6cyclictest2475936-21kworker/u8:0+flush-179:010:30:010
241709899310,31cyclictest0-21swapper/009:43:000
4577091300,7ptp4l441ktimers/312:05:003
2417107993028,1cyclictest0-21swapper/311:57:593
2417107993028,1cyclictest0-21swapper/311:57:583
2417107993028,1cyclictest0-21swapper/310:53:003
2417107993028,1cyclictest0-21swapper/310:29:583
2417107993027,2cyclictest0-21swapper/312:29:563
241710799300,2cyclictest2450750-21turbostat08:55:003
241710799300,28cyclictest0-21swapper/310:05:113
2417103993027,2cyclictest0-21swapper/211:00:012
2417103993027,2cyclictest0-21swapper/207:40:122
2417103993027,2cyclictest0-21swapper/207:10:132
2417103993026,2cyclictest0-21swapper/210:37:002
241710399300,28cyclictest0-21swapper/212:25:132
241710399300,28cyclictest0-21swapper/209:10:122
2417101993024,4cyclictest2409639-21kworker/u8:0+events_unbound07:10:151
2417098993025,4cyclictest2521984-21dpkg12:35:010
2417098993025,3cyclictest0-21swapper/008:55:140
2417098993024,5cyclictest2467526-21latency09:45:180
241709899301,2cyclictest0-21swapper/008:20:130
4577091290,7ptp4l61490irq/134-eno1-TxRx-012:40:013
4577091290,7ptp4l441ktimers/311:05:003
4577091290,7ptp4l441ktimers/307:59:563
2417107992927,1cyclictest0-21swapper/312:30:113
2417107992927,1cyclictest0-21swapper/312:10:583
2417107992927,1cyclictest0-21swapper/311:22:003
2417107992927,1cyclictest0-21swapper/308:57:593
2417107992927,1cyclictest0-21swapper/307:50:023
2417107992926,2cyclictest0-21swapper/311:00:013
241710799290,28cyclictest0-21swapper/311:45:113
2417103992927,1cyclictest0-21swapper/208:34:592
2417103992926,2cyclictest0-21swapper/212:20:592
2417103992926,2cyclictest0-21swapper/212:20:592
2417103992926,2cyclictest0-21swapper/212:05:122
2417103992926,2cyclictest0-21swapper/211:15:112
2417103992926,2cyclictest0-21swapper/209:40:112
2417103992925,2cyclictest0-21swapper/210:57:002
241710399290,27cyclictest0-21swapper/212:30:112
241710399290,27cyclictest0-21swapper/212:15:132
241710399290,27cyclictest0-21swapper/211:10:142
241710399290,27cyclictest0-21swapper/210:40:132
241710399290,27cyclictest0-21swapper/209:50:032
2417098992922,5cyclictest2416996-21latency_hist07:10:020
4577091280,6ptp4l61490irq/134-eno1-TxRx-009:35:013
4577091280,6ptp4l61490irq/134-eno1-TxRx-008:40:013
4577091280,6ptp4l441ktimers/309:20:003
2417107992826,1cyclictest0-21swapper/312:20:133
2417107992826,1cyclictest0-21swapper/312:20:133
2417107992826,1cyclictest0-21swapper/312:15:133
241710799280,2cyclictest0-21swapper/309:10:133
241710799280,27cyclictest2436423-21turbostat08:10:003
241710799280,26cyclictest0-21swapper/308:00:143
2417103992825,2cyclictest0-21swapper/210:47:582
2417103992825,2cyclictest0-21swapper/209:23:592
2417103992824,2cyclictest0-21swapper/207:35:122
241710399280,26cyclictest0-21swapper/208:05:592
4577091270,6ptp4l441ktimers/307:40:003
4577091270,5ptp4l441ktimers/311:39:553
4577091270,5ptp4l441ktimers/310:40:003
2417107992725,1cyclictest0-21swapper/310:40:133
2417107992725,1cyclictest0-21swapper/308:19:003
2417107992725,1cyclictest0-21swapper/307:10:133
241710799270,26cyclictest2471710-21turbostat10:00:013
241710799270,26cyclictest0-21swapper/311:15:113
241710799270,26cyclictest0-21swapper/308:40:143
241710799270,25cyclictest0-21swapper/308:46:003
2417103992725,1cyclictest0-21swapper/207:50:022
2417103992724,2cyclictest0-21swapper/207:55:592
2417098992722,3cyclictest0-21swapper/009:35:010
4577091260,6ptp4l61490irq/134-eno1-TxRx-008:15:003
4577091260,6ptp4l61490irq/134-eno1-TxRx-007:49:563
4577091260,5ptp4l61490irq/134-eno1-TxRx-011:55:003
4577091260,5ptp4l441ktimers/311:29:553
4577091260,5ptp4l441ktimers/309:44:563
4577091260,5ptp4l441ktimers/309:09:543
2417103992623,2cyclictest0-21swapper/211:27:002
2417103992623,2cyclictest0-21swapper/209:35:122
2417103992623,2cyclictest0-21swapper/209:35:112
2417103992623,2cyclictest0-21swapper/209:09:552
2417103992623,2cyclictest0-21swapper/208:37:582
241710399260,2cyclictest0-21swapper/207:45:592
241710399260,24cyclictest0-21swapper/211:30:582
241710399260,24cyclictest0-21swapper/211:05:132
241710399260,24cyclictest0-21swapper/207:20:122
4577091250,5ptp4l441ktimers/309:24:593
2417103992523,1cyclictest0-21swapper/211:55:002
2417103992522,2cyclictest0-21swapper/210:24:002
241710399250,2cyclictest0-21swapper/208:10:592
2417103992421,2cyclictest0-21swapper/212:01:592
2417103992421,2cyclictest0-21swapper/208:50:592
2417103992219,2cyclictest0-21swapper/211:38:592
2417103992219,2cyclictest0-21swapper/209:46:592
2417103992219,2cyclictest0-21swapper/208:02:592
231999220,13rtkit-daemon3203871-21ntpd07:08:351
2417103992017,2cyclictest0-21swapper/208:23:592
2417103991816,1cyclictest0-21swapper/208:44:592
2417103991815,2cyclictest0-21swapper/209:58:592
2417103991714,2cyclictest0-21swapper/207:25:592
24171039930,2cyclictest0-21swapper/207:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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