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2026-09-11 - 23:41
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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 792 highest latencies:
System rackeslot6.osadl.org (updated Fri Sep 11, 2026 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
239450699161152,6cyclictest2457842-21latency_hist10:25:020
239450899146127,14cyclictest1213033-21systemd-journal12:10:021
239450699146129,10cyclictest2435041-21gpgv09:15:020
239450899143117,21cyclictest2449376-21apt-get10:00:011
239450699141131,7cyclictest2447764-21latency_hist09:55:010
239450899140129,8cyclictest2423578-21apt-get08:36:571
239450699129122,5cyclictest2465774-21kworker/u8:2+events_unbound11:30:010
239450899127116,8cyclictest2425219-21kworker/u8:0+flush-179:008:45:011
239450899123110,10cyclictest2501314-21apt-get12:40:001
239450699123112,7cyclictest2431601-21latency_hist09:05:010
239450899119113,4cyclictest2465774-21kworker/u8:2+flush-179:011:30:301
239450699119111,6cyclictest2433220-21kworker/u8:3+flush-179:010:10:270
239450899118108,7cyclictest2433220-21kworker/u8:3+flush-179:009:50:271
239450699116105,8cyclictest2439813-21latency_hist09:30:010
239450699115101,11cyclictest1213033-21systemd-journal09:24:590
23945089911399,10cyclictest2472159-21latency_hist11:10:011
23945089911295,16cyclictest2432644-21kworker/u8:0+flush-179:009:15:161
23945089910997,9cyclictest2415620-21apt-get08:15:111
239450899109101,5cyclictest2468983-21latency_hist11:00:011
239450699109100,7cyclictest2395984-21latency_hist07:15:010
23945089910498,4cyclictest2407187-21kworker/u8:2+flush-179:007:50:231
23945069910498,4cyclictest2465774-21kworker/u8:2+flush-179:011:15:200
23945069910293,7cyclictest2486070-21kworker/u8:3+flush-179:012:00:000
23945089910171,19cyclictest2461272-21apt-get10:35:121
23945069910194,5cyclictest2486070-21kworker/u8:3+flush-179:012:05:220
23945069910194,4cyclictest2460998-21kworker/u8:1+flush-179:010:35:220
23945069910192,6cyclictest2452817-21apt-get10:10:010
23945069910188,10cyclictest1213033-21systemd-journal11:05:000
23945069910094,5cyclictest2479281-21kworker/u8:0+events_unbound12:25:010
2394508999987,9cyclictest2443264-21apt-get09:40:121
2394508999889,6cyclictest2405567-21latency_hist07:45:011
2394506999891,4cyclictest2479281-21kworker/u8:0+flush-179:012:25:160
2394506999791,5cyclictest2401805-21kworker/u8:1+flush-179:007:30:220
2394506999689,5cyclictest2421157-21kworker/u8:3+flush-179:008:40:230
2394508999581,10cyclictest2474015-21apt-get11:15:001
2394506999585,8cyclictest2474002-21latency_hist11:15:020
2394508999384,6cyclictest2459429-21latency_hist10:30:011
2394506999386,5cyclictest2453760-21kworker/u8:0+flush-179:010:15:210
2394506999283,7cyclictest2479281-21kworker/u8:0+events_unbound12:20:000
2394506999182,5cyclictest2465774-21kworker/u8:2+flush-179:011:30:280
2394506999180,8cyclictest510-21rs:main0
2394506999180,8cyclictest510-21rs:main0
2394508999083,4cyclictest2374632-21kworker/u8:3+flush-179:007:10:171
2394506999085,4cyclictest2411670-21kworker/u8:0+events_unbound08:10:000
2394508998978,8cyclictest2490187-21latency_hist12:05:011
2394506998981,6cyclictest2403947-21kworker/u8:1+flush-179:007:45:000
2394508998878,7cyclictest2487535-21diskstats11:55:141
2394508998878,7cyclictest1213033-21systemd-journal08:12:181
2394506998881,5cyclictest2421157-21kworker/u8:3+flush-179:008:50:010
2394506998878,7cyclictest2394446-21kworker/u8:0+flush-179:007:45:230
2394506998781,4cyclictest2394446-21kworker/u8:0+events_unbound07:25:140
2394506998780,6cyclictest2394446-21kworker/u8:0+flush-179:007:35:230
239450699871,83cyclictest1-21systemd07:20:010
2394508998573,10cyclictest2459684-21apt-get10:30:121
2394506998578,5cyclictest2482248-21kworker/u8:1+flush-179:011:45:200
2394506998578,5cyclictest2482248-21kworker/u8:1+flush-179:011:45:200
2394506998474,8cyclictest2480868-21/usr/sbin/munin11:35:170
2394506998376,5cyclictest2433220-21kworker/u8:3+flush-179:010:00:000
2394506998275,5cyclictest2447798-21kworker/u8:2+flush-179:010:00:160
2394506998252,15cyclictest2479281-21kworker/u8:0+flush-179:012:00:200
2394508998170,7cyclictest2435690-21kworker/u8:1+events_unbound09:20:191
2394508998168,10cyclictest2394446-21kworker/u8:0+events_unbound07:20:131
2394506998175,4cyclictest2433220-21kworker/u8:3+flush-179:009:15:200
2394508998071,6cyclictest2465774-21kworker/u8:2+flush-179:011:20:141
2394506998073,5cyclictest2465774-21kworker/u8:2+flush-179:010:50:180
2394506998073,5cyclictest2459404-21kworker/u8:0+flush-179:010:45:200
2394508997968,8cyclictest2417514-21kworker/u8:2+events_unbound08:25:031
2394508997766,8cyclictest2417514-21kworker/u8:2+flush-179:008:45:201
2394506997769,6cyclictest2438262-21kworker/u8:2+flush-179:009:30:230
2394506997765,9cyclictest2500267-21diskstats12:35:140
2394508997670,5cyclictest2479281-21kworker/u8:0+events_unbound12:10:301
2394506997668,6cyclictest2477498-21kworker/u8:1+events_unbound11:25:000
2394506997570,4cyclictest2421157-21kworker/u8:3+events_unbound08:55:190
2394508997461,10cyclictest2434784-21apt-get09:15:011
2394506997468,4cyclictest2407187-21kworker/u8:2+flush-179:007:50:150
2394506997463,8cyclictest2462880-21apt-get10:40:110
2394508997364,6cyclictest2407187-21kworker/u8:2+events_unbound07:55:021
2394506997363,6cyclictest2421157-21kworker/u8:3+flush-179:008:35:210
2394508997263,6cyclictest2465774-21kworker/u8:2+flush-179:011:35:231
2394508997263,6cyclictest2459404-21kworker/u8:0+flush-179:010:45:241
2394508997163,6cyclictest2433220-21kworker/u8:3+events_unbound10:10:031
2394508997163,5cyclictest2485410-21latency_hist11:50:021
2394508997163,5cyclictest2485410-21latency_hist11:50:011
2394506997165,4cyclictest2443047-21kworker/u8:0+flush-179:009:40:210
2394506997163,6cyclictest2417514-21kworker/u8:2+flush-179:008:25:180
2394506997067,2cyclictest2447798-21kworker/u8:2+events_unbound10:25:210
2394506997057,6cyclictest2411670-21kworker/u8:0+events_unbound08:10:190
2394508996963,4cyclictest2401805-21kworker/u8:1+events_unbound07:30:241
2394506996963,5cyclictest2460998-21kworker/u8:1+events_unbound10:35:000
2394506996962,5cyclictest2483825-21latency_hist11:45:020
2394508996863,3cyclictest2465774-21kworker/u8:2+flush-179:011:15:191
2394506996862,4cyclictest2374632-21kworker/u8:3+events_unbound07:20:240
2394506996761,4cyclictest2479281-21kworker/u8:0+flush-179:012:10:170
2394506996752,8cyclictest2411670-21kworker/u8:0+events_unbound08:20:200
2394508996659,5cyclictest2429980-21kworker/u8:1+flush-179:009:00:201
2394508996633,19cyclictest2402605-21apt-get07:35:131
2394508996558,5cyclictest1213033-21systemd-journal09:39:181
2394508996455,7cyclictest2411670-21kworker/u8:0+events_unbound08:25:011
2394508996455,6cyclictest2491807-21kworker/u8:2+flush-179:012:20:191
2394508996454,6cyclictest2491807-21kworker/u8:2+flush-179:012:30:211
2394506996455,7cyclictest1213033-21systemd-journal10:59:550
2394508996356,5cyclictest2409232-21kworker/u8:1+events_unbound08:00:151
2394506996353,7cyclictest2499726-21latency_hist12:35:010
2394508996253,8cyclictest2429980-21kworker/u8:1+flush-179:009:05:151
2394508996248,7cyclictest2374632-21kworker/u8:3+events_unbound07:25:241
2394506996255,4cyclictest2411670-21kworker/u8:0+events_unbound08:05:010
2394506996253,7cyclictest2486070-21kworker/u8:3+flush-179:011:55:000
2394508996157,3cyclictest2447798-21kworker/u8:2+flush-179:010:22:171
2394508996153,5cyclictest2447798-21kworker/u8:2+flush-179:010:00:161
2394506996151,7cyclictest2417514-21kworker/u8:2+flush-179:009:09:590
2394506996150,9cyclictest2438262-21kworker/u8:2+flush-179:009:35:200
2394506996052,6cyclictest2433220-21kworker/u8:3+events_unbound09:45:250
2394506996050,7cyclictest2409232-21kworker/u8:1+flush-179:007:55:260
2394508995950,7cyclictest2497153-21kworker/u8:3+events_unbound12:25:191
2394508995947,9cyclictest2428947-21diskstats08:55:141
2394508995751,5cyclictest2417514-21kworker/u8:2+events_unbound08:50:191
2394508995751,4cyclictest2460998-21kworker/u8:1+flush-179:010:40:221
2394508995747,7cyclictest2433220-21kworker/u8:3+flush-179:009:45:221
2394508995649,5cyclictest2486070-21kworker/u8:3+events_unbound12:15:241
2394508995649,5cyclictest2374632-21kworker/u8:3+events_unbound07:15:231
2394506995645,8cyclictest1213033-21systemd-journal08:55:000
2394508995549,4cyclictest2459404-21kworker/u8:0+events_unbound11:00:171
2394508995546,7cyclictest2447798-21kworker/u8:2+flush-179:010:20:011
2394506995546,6cyclictest2416238-21load08:15:180
2394506995143,5cyclictest2465774-21kworker/u8:2+flush-179:011:05:220
4577091490,14ptp4l61490irq/134-eno1-TxRx-007:10:003
2394508994841,4cyclictest0-21swapper/110:50:141
2394508994523,20cyclictest0-21swapper/108:30:171
2394508994523,20cyclictest0-21swapper/108:30:171
2394508994338,4cyclictest2433220-21kworker/u8:3+flush-179:009:25:211
2394508994337,5cyclictest2438262-21kworker/u8:2+flush-179:009:30:261
2394508994334,7cyclictest2394446-21kworker/u8:0+events_unbound07:45:131
2394508994332,8cyclictest2479044-21latency_hist11:30:001
2394508994318,3cyclictest0-21swapper/111:50:181
2394512994235,5cyclictest2475887-21turbostat11:20:003
239451099420,40cyclictest0-21swapper/207:35:592
2394508994230,10cyclictest510-21rs:main1
239451299410,39cyclictest2449381-21turbostat09:59:593
239451099410,2cyclictest0-21swapper/209:54:592
239450899410,40cyclictest0-21swapper/111:40:131
239451099400,36cyclictest0-21swapper/211:50:002
239451099400,36cyclictest0-21swapper/211:49:592
2394508994034,5cyclictest2433220-21kworker/u8:3+flush-179:010:05:241
2394512993832,5cyclictest2403989-21turbostat07:40:003
2394512993832,5cyclictest0-21swapper/307:31:593
2394510993834,2cyclictest0-21swapper/209:02:002
239451099380,36cyclictest0-21swapper/208:35:592
239451099380,35cyclictest0-21swapper/212:20:592
4577091370,3ptp4l441ktimers/309:15:033
2394512993731,5cyclictest0-21swapper/312:15:593
2394510993734,2cyclictest0-21swapper/209:14:542
2394510993733,2cyclictest0-21swapper/210:39:542
2394510993733,2cyclictest0-21swapper/208:47:002
239451099370,2cyclictest0-21swapper/208:26:592
2394512993634,1cyclictest0-21swapper/309:45:593
239451299360,35cyclictest0-21swapper/312:06:593
239451299360,35cyclictest0-21swapper/310:13:583
239451299360,35cyclictest0-21swapper/308:22:593
239451299360,1cyclictest0-21swapper/310:53:593
2394512993529,5cyclictest0-21swapper/307:49:593
2394512993528,6cyclictest0-21swapper/310:32:593
239451099350,27cyclictest0-21swapper/208:55:112
2394512993433,1cyclictest0-21swapper/311:27:593
2394510993430,2cyclictest0-21swapper/212:25:592
2394510993430,2cyclictest0-21swapper/208:11:592
2394510993429,2cyclictest0-21swapper/207:16:582
231999340,9rtkit-daemon495-21gpm07:06:451
2394512993331,1cyclictest0-21swapper/311:56:593
2394512993331,1cyclictest0-21swapper/309:29:553
2394512993331,1cyclictest0-21swapper/309:10:593
2394512993331,1cyclictest0-21swapper/307:24:553
2394510993330,2cyclictest0-21swapper/211:02:002
2394512993230,1cyclictest0-21swapper/312:03:593
239451299320,26cyclictest0-21swapper/311:40:133
2394510993229,2cyclictest0-21swapper/210:01:592
2394510993225,6cyclictest0-21swapper/208:00:122
239451099320,30cyclictest0-21swapper/208:09:592
239451099320,2cyclictest0-21swapper/207:29:552
239451099320,28cyclictest0-21swapper/211:30:202
2394512993129,1cyclictest0-21swapper/310:21:003
2394512993129,1cyclictest0-21swapper/308:31:593
2394512993129,1cyclictest0-21swapper/308:31:593
2394512993129,1cyclictest0-21swapper/308:12:593
2394512993129,1cyclictest0-21swapper/307:19:593
2394512993129,1cyclictest0-21swapper/307:14:593
2394512993125,5cyclictest0-21swapper/308:55:123
2394512993125,5cyclictest0-21swapper/308:00:123
2394510993125,5cyclictest0-21swapper/209:15:042
239451099310,2cyclictest0-21swapper/211:55:122
239451099310,29cyclictest0-21swapper/211:40:122
239451099310,27cyclictest0-21swapper/212:10:172
2394512993028,1cyclictest0-21swapper/309:43:583
2394512993028,1cyclictest0-21swapper/308:51:583
2394512993027,2cyclictest0-21swapper/309:54:593
2394512993026,3cyclictest0-21swapper/308:15:133
239451299300,2cyclictest0-21swapper/308:25:023
239451299300,28cyclictest0-21swapper/312:10:193
2394510993027,2cyclictest0-21swapper/211:10:012
2394510993027,2cyclictest0-21swapper/209:34:002
2394510993026,2cyclictest0-21swapper/210:10:012
2394510993026,2cyclictest0-21swapper/209:08:592
239451099300,28cyclictest0-21swapper/211:15:032
239451099300,27cyclictest0-21swapper/210:40:132
4577091290,7ptp4l441ktimers/312:30:023
4577091290,7ptp4l441ktimers/310:45:003
4577091290,7ptp4l441ktimers/308:10:013
4577091290,6ptp4l441ktimers/312:25:013
4577091290,6ptp4l441ktimers/310:05:023
4577091290,6ptp4l441ktimers/307:30:013
2394512992926,2cyclictest0-21swapper/309:05:133
239451299290,28cyclictest0-21swapper/312:35:123
239451299290,1cyclictest0-21swapper/311:10:023
239451299290,1cyclictest0-21swapper/307:50:593
2394510992927,1cyclictest0-21swapper/211:39:592
2394510992926,2cyclictest0-21swapper/212:32:002
2394510992926,2cyclictest0-21swapper/210:50:132
239451099290,27cyclictest0-21swapper/208:20:132
239451099290,27cyclictest0-21swapper/208:15:122
4577091280,6ptp4l61490irq/134-eno1-TxRx-011:25:003
4577091280,6ptp4l441ktimers/311:50:003
4577091280,6ptp4l441ktimers/311:50:003
4577091280,6ptp4l441ktimers/309:40:013
4577091280,6ptp4l441ktimers/308:00:013
4577091280,6ptp4l441ktimers/307:45:013
2394512992826,1cyclictest0-21swapper/308:44:593
239451299280,2cyclictest0-21swapper/311:30:193
239451299280,27cyclictest2465805-21turbostat10:50:003
239451299280,26cyclictest0-21swapper/312:30:193
2394510992825,2cyclictest0-21swapper/212:19:002
2394510992825,2cyclictest0-21swapper/212:00:132
2394510992825,2cyclictest0-21swapper/210:30:592
2394510992825,2cyclictest0-21swapper/210:21:592
2394510992825,2cyclictest0-21swapper/209:20:132
2394510992825,2cyclictest0-21swapper/208:50:122
239451099280,26cyclictest0-21swapper/212:39:592
239451099280,26cyclictest0-21swapper/210:26:592
239451099280,1cyclictest0-21swapper/211:07:592
4577091270,6ptp4l441ktimers/311:00:023
4577091270,6ptp4l441ktimers/310:39:563
4577091270,5ptp4l61490irq/134-eno1-TxRx-011:04:563
4577091270,5ptp4l441ktimers/310:20:003
2394512992725,1cyclictest0-21swapper/309:02:003
239451299270,26cyclictest0-21swapper/311:39:593
2394510992725,1cyclictest0-21swapper/207:14:592
2394510992724,2cyclictest0-21swapper/210:16:592
2394510992721,5cyclictest0-21swapper/211:53:592
4577091260,5ptp4l61490irq/134-eno1-TxRx-011:10:013
4577091260,5ptp4l61490irq/134-eno1-TxRx-010:30:003
4577091260,5ptp4l441ktimers/311:54:553
4577091260,5ptp4l441ktimers/309:34:553
4577091260,4ptp4l61490irq/134-eno1-TxRx-008:50:013
2394512992624,1cyclictest0-21swapper/308:35:593
2394510992623,2cyclictest0-21swapper/209:46:592
2394510992623,2cyclictest0-21swapper/209:38:592
2394510992623,2cyclictest0-21swapper/207:20:592
4577091250,5ptp4l441ktimers/310:10:023
2394512992523,1cyclictest0-21swapper/309:20:583
2394510992320,2cyclictest0-21swapper/211:24:582
2394510992320,2cyclictest0-21swapper/209:55:592
2394506992318,3cyclictest0-21swapper/007:10:010
2394510992219,2cyclictest0-21swapper/210:10:592
2394510992219,2cyclictest0-21swapper/207:49:552
2394510992119,1cyclictest0-21swapper/207:44:592
2394510992117,2cyclictest0-21swapper/208:45:002
2394510992017,2cyclictest0-21swapper/210:55:592
2394510991916,2cyclictest0-21swapper/212:07:592
2394510991613,2cyclictest0-21swapper/208:34:562
2394510991613,2cyclictest0-21swapper/208:34:562
2394510991612,2cyclictest0-21swapper/207:58:592
2394510991611,3cyclictest2408746-21turbostat07:55:002
2394510991512,2cyclictest0-21swapper/210:49:552
2394510991412,1cyclictest0-21swapper/211:29:562
2394510991310,2cyclictest0-21swapper/209:41:592
239451099129,2cyclictest0-21swapper/207:30:132
23945109990,8cyclictest0-21swapper/209:26:582
23945109940,2cyclictest0-21swapper/207:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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