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2026-08-25 - 18:57
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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 Tue Aug 25, 2026 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
220833099142132,7cyclictest2304972-21latency_hist12:10:010
220833099140128,9cyclictest2298603-21latency_hist11:50:010
220833099132125,5cyclictest2219589-21kworker/u8:1+events_unbound08:20:010
220833099132121,8cyclictest2241863-21latency_hist08:55:010
220833099131119,9cyclictest1213033-21systemd-journal11:35:000
220833199129117,9cyclictest1213033-21systemd-journal12:35:011
220833099128119,6cyclictest2250088-21latency_hist09:20:010
220833199123114,6cyclictest2292274-21kworker/u8:0+flush-179:012:15:001
220833099123112,8cyclictest2210112-21/usr/sbin/munin07:15:240
220833099121116,4cyclictest2292274-21kworker/u8:0+events_unbound12:10:250
220833199114107,5cyclictest2206794-21kworker/u8:3+flush-179:007:20:001
220833199114106,6cyclictest2254876-21apt-get09:35:011
220833099114106,6cyclictest2224275-21kworker/u8:0+flush-179:008:30:000
220833199113102,8cyclictest2216245-21latency_hist07:35:011
220833099112104,6cyclictest2285867-21apt-get11:10:120
220833199111103,6cyclictest2254838-21kworker/u8:1+flush-179:009:45:001
220833099111102,6cyclictest2259892-21latency_hist09:50:000
22083309910894,11cyclictest510-21rs:main0
22083309910798,6cyclictest2295414-21latency_hist11:40:010
22083319910689,14cyclictest2248477-21kworker/u8:1+flush-179:009:15:151
22083319910497,5cyclictest2256759-21kworker/u8:0+flush-179:010:00:241
22083319910495,6cyclictest2303621-21kworker/u8:1+flush-179:012:05:181
22083309910297,4cyclictest2309741-21kworker/u8:2+events_unbound12:34:460
22083319910193,5cyclictest2235479-21kworker/u8:3+flush-179:008:45:171
22083309910192,6cyclictest2240279-21latency_hist08:50:010
22083319910090,7cyclictest2290118-21kworker/u8:1+flush-179:011:30:151
22083309910092,6cyclictest2301794-21latency_hist12:00:010
2208331999992,5cyclictest2235479-21kworker/u8:3+flush-179:008:40:161
2208330999886,9cyclictest1213033-21systemd-journal09:30:010
2208331999788,7cyclictest510-21rs:main1
2208330999790,5cyclictest2219589-21kworker/u8:1+flush-179:008:00:190
2208330999787,8cyclictest2227750-21apt-get08:10:120
2208331999581,11cyclictest2288789-21apt-get11:20:001
2208330999590,4cyclictest2303621-21kworker/u8:1+events_unbound12:20:230
2208330999590,4cyclictest2292274-21kworker/u8:0+events_unbound12:19:550
2208330999585,7cyclictest2227495-21latency_hist08:10:000
2208331999486,5cyclictest2219545-21latency_hist07:45:011
2208331999485,6cyclictest2224275-21kworker/u8:0+events_unbound08:30:001
2208330999489,4cyclictest2266292-21kworker/u8:3+events_unbound10:14:580
2208331999388,3cyclictest2256759-21kworker/u8:0+flush-179:009:55:161
2208330999389,3cyclictest2290118-21kworker/u8:1+events_unbound11:44:560
2208331999285,5cyclictest2224275-21kworker/u8:0+flush-179:008:20:191
2208330999287,4cyclictest2233307-21kworker/u8:1+events_unbound08:30:280
2208330999285,5cyclictest2237089-21latency_hist08:40:020
2208331999182,6cyclictest2256759-21kworker/u8:0+events_unbound10:20:001
2208331999176,13cyclictest1213033-21systemd-journal11:10:001
2208331999173,16cyclictest2233307-21kworker/u8:1+flush-179:008:30:261
2208330999186,4cyclictest2249027-21kworker/u8:2+events_unbound09:20:140
2208330999179,10cyclictest2281087-21apt-get10:55:120
2208330999179,10cyclictest2281087-21apt-get10:55:120
2208331999083,5cyclictest2298860-21apt-get11:50:121
2208331999083,5cyclictest2290118-21kworker/u8:1+flush-179:011:35:231
2208330998978,9cyclictest1213033-21systemd-journal08:25:000
2208331998882,5cyclictest2309757-21latency_hist12:25:011
2208331998877,8cyclictest1213033-21systemd-journal11:25:161
2208331998867,19cyclictest2301795-21kworker/u8:3+flush-179:012:05:001
2208330998884,3cyclictest2219589-21kworker/u8:1+events_unbound07:54:570
2208330998884,3cyclictest2219589-21kworker/u8:1+events_unbound07:54:560
2208331998780,4cyclictest2235479-21kworker/u8:3+flush-179:009:05:261
2208330998782,4cyclictest2269668-21kworker/u8:1+events_unbound10:24:560
2208330998681,4cyclictest2256759-21kworker/u8:0+events_unbound09:59:010
2208330998678,3cyclictest2210926-21kworker/u8:0+events_unbound07:21:590
2208331998579,5cyclictest2269756-21kworker/u8:2+events_unbound11:15:011
2208331998578,4cyclictest2269756-21kworker/u8:2+flush-179:010:25:191
2208331998569,13cyclictest2256759-21kworker/u8:0+flush-179:010:10:021
2208331998472,9cyclictest2290118-21kworker/u8:1+flush-179:011:40:231
2208331998373,7cyclictest2269668-21kworker/u8:1+flush-179:010:40:231
2208331998373,6cyclictest2251716-21kworker/u8:0+flush-179:009:25:221
2208331998371,9cyclictest2256759-21kworker/u8:0+flush-179:010:15:001
2208331998356,23cyclictest1213033-21systemd-journal07:30:001
2208330998374,6cyclictest2224315-21latency_hist08:00:010
2208330998373,3cyclictest2256759-21kworker/u8:0+events_unbound10:01:010
2208331998276,4cyclictest2224275-21kworker/u8:0+flush-179:008:10:221
2208330998278,3cyclictest2309741-21kworker/u8:2+events_unbound12:27:010
2208330998278,3cyclictest2211522-21kworker/u8:1+events_unbound07:29:570
2208330998277,3cyclictest2314531-21apt12:40:000
2208330998275,5cyclictest510-21rs:main0
2208331998174,4cyclictest2210926-21kworker/u8:0+events_unbound07:20:231
2208330998177,3cyclictest2269756-21kworker/u8:2+events_unbound10:35:590
2208330998176,4cyclictest2269756-21kworker/u8:2+events_unbound11:18:000
2208331998073,4cyclictest2292274-21kworker/u8:0+flush-179:012:15:161
2208330998076,3cyclictest2241899-21kworker/u8:2+events_unbound08:59:550
2208330998076,3cyclictest2211522-21kworker/u8:1+events_unbound07:31:000
2208330998076,3cyclictest2192538-21kworker/u8:2+events_unbound07:13:010
2208330998075,4cyclictest2235479-21kworker/u8:3+events_unbound09:09:010
220833099800,78cyclictest1-21systemd09:55:000
2208331997974,4cyclictest2216281-21kworker/u8:2+flush-179:007:46:011
2208331997972,5cyclictest2243984-21apt-get09:00:131
2208330997975,3cyclictest2216237-21kworker/u8:0+events_unbound07:43:590
2208330997974,4cyclictest2233307-21kworker/u8:1+events_unbound08:40:200
2208330997966,10cyclictest2269756-21kworker/u8:2+events_unbound10:55:000
2208330997871,5cyclictest2300189-21latency_hist11:55:010
2208331997769,5cyclictest2269756-21kworker/u8:2+flush-179:011:20:221
2208331997769,5cyclictest2269756-21kworker/u8:2+events_unbound11:00:011
2208331997769,5cyclictest2269756-21kworker/u8:2+events_unbound11:00:011
2208331997768,6cyclictest2206794-21kworker/u8:3+flush-179:007:35:161
2208331997664,8cyclictest2249027-21kworker/u8:2+flush-179:009:20:261
2208330997672,3cyclictest2269756-21kworker/u8:2+events_unbound10:34:380
2208330997470,3cyclictest2251716-21kworker/u8:0+events_unbound09:30:280
2208331997369,3cyclictest2235479-21kworker/u8:3+flush-179:009:10:251
2208331997359,11cyclictest1213033-21systemd-journal10:40:001
2208330997357,7cyclictest2248487-21latency_hist09:15:010
2208331997265,5cyclictest2269668-21kworker/u8:1+events_unbound10:25:001
2208331997264,5cyclictest2219589-21kworker/u8:1+flush-179:008:05:231
2208331997263,6cyclictest2309741-21kworker/u8:2+flush-179:012:25:161
2208331997262,7cyclictest2206794-21kworker/u8:3+events_unbound07:10:281
2208330997162,6cyclictest2282697-21apt-get11:00:140
2208330997065,4cyclictest2269668-21kworker/u8:1+events_unbound10:40:170
2208331996963,4cyclictest2292274-21kworker/u8:0+flush-179:011:45:131
2208331996962,5cyclictest2240264-21kworker/u8:0+flush-179:008:55:251
2208331996961,6cyclictest2290118-21kworker/u8:1+flush-179:011:55:221
2208331996958,8cyclictest2233307-21kworker/u8:1+flush-179:008:35:151
2208331996956,10cyclictest2216281-21kworker/u8:2+flush-179:007:55:001
2208331996956,10cyclictest2216281-21kworker/u8:2+flush-179:007:54:591
2208331996750,13cyclictest2256759-21kworker/u8:0+flush-179:009:50:191
2208331996658,5cyclictest2269756-21kworker/u8:2+flush-179:010:30:131
2208331996658,4cyclictest2219589-21kworker/u8:1+flush-179:008:00:091
2208335996561,2cyclictest0-21swapper/207:17:002
2208331996562,2cyclictest2254848-21kworker/u8:3+events_unbound09:35:231
2208330996561,3cyclictest2269756-21kworker/u8:2+events_unbound10:25:020
2208330996561,3cyclictest2256759-21kworker/u8:0+events_unbound10:15:040
2208331996458,4cyclictest2219589-21kworker/u8:1+events_unbound07:55:211
2208330996458,5cyclictest2241899-21kworker/u8:2+flush-179:009:00:170
2208331996257,4cyclictest2240264-21kworker/u8:0+flush-179:008:50:151
2208330996258,3cyclictest2269756-21kworker/u8:2+events_unbound10:45:030
2208331996154,5cyclictest2208248-21latency_hist07:10:011
2208331996152,7cyclictest2269756-21kworker/u8:2+flush-179:010:50:171
2208330996157,3cyclictest2292274-21kworker/u8:0+events_unbound12:00:020
2208330996053,5cyclictest2258308-21latency_hist09:45:020
2208331995949,8cyclictest2254838-21kworker/u8:1+events_unbound09:49:591
2208331995846,10cyclictest2313186-21apt-get12:35:121
2208330995652,3cyclictest2290118-21kworker/u8:1+events_unbound11:28:000
4577091540,9ptp4l61490irq/134-eno1-TxRx-007:08:513
2208340995345,6cyclictest2216261-21turbostat07:35:003
2208335995350,2cyclictest0-21swapper/212:11:592
2208335995148,2cyclictest0-21swapper/208:51:582
2208330995146,4cyclictest2216281-21kworker/u8:2+flush-179:007:45:230
2208330995045,4cyclictest2254838-21kworker/u8:1+events_unbound09:39:000
2208330994843,3cyclictest1-21systemd11:10:000
2208335994643,2cyclictest0-21swapper/209:36:592
2208331994640,5cyclictest2269756-21kworker/u8:2+flush-179:010:45:251
2208335994543,1cyclictest0-21swapper/212:29:592
220833599430,30cyclictest0-21swapper/212:40:002
2208331994335,6cyclictest1213033-21systemd-journal08:17:011
2208330994339,3cyclictest2261712-21kworker/u8:2+events_unbound10:08:340
2208335994239,2cyclictest0-21swapper/208:18:592
2208340994139,1cyclictest0-21swapper/312:29:593
220834099410,40cyclictest0-21swapper/311:18:003
220834099400,38cyclictest2279261-21turbostat10:50:003
220834099390,37cyclictest2213078-21turbostat07:25:003
2208335993936,2cyclictest0-21swapper/210:37:002
2208335993936,2cyclictest0-21swapper/209:22:582
2208335993936,2cyclictest0-21swapper/207:54:562
2208335993936,2cyclictest0-21swapper/207:54:562
2208335993936,2cyclictest0-21swapper/207:46:592
220833599390,35cyclictest0-21swapper/207:24:552
2208340993836,1cyclictest0-21swapper/308:24:593
220834099380,35cyclictest0-21swapper/310:51:593
220833599380,36cyclictest0-21swapper/209:57:582
220833599380,36cyclictest0-21swapper/208:36:592
220833599380,36cyclictest0-21swapper/208:20:592
2208340993732,4cyclictest2230692-21turbostat08:20:013
220834099370,36cyclictest0-21swapper/311:49:553
2208335993734,2cyclictest0-21swapper/211:26:592
220833599370,35cyclictest0-21swapper/209:47:002
220833599370,1cyclictest0-21swapper/210:41:582
2208340993634,1cyclictest0-21swapper/312:10:593
2208340993634,1cyclictest0-21swapper/311:31:593
2208340993634,1cyclictest0-21swapper/311:21:593
2208340993634,1cyclictest0-21swapper/309:02:593
2208340993633,2cyclictest0-21swapper/307:25:593
220834099360,35cyclictest0-21swapper/312:33:593
220834099360,35cyclictest0-21swapper/311:42:593
220834099360,35cyclictest0-21swapper/311:10:593
220834099360,35cyclictest0-21swapper/309:16:593
220834099360,35cyclictest0-21swapper/308:33:003
220834099360,1cyclictest0-21swapper/308:52:593
2208340993533,1cyclictest0-21swapper/310:36:593
2208340993533,1cyclictest0-21swapper/308:58:583
2208340993533,1cyclictest0-21swapper/308:06:593
2208340993530,4cyclictest2303397-21turbostat12:05:003
220834099350,34cyclictest0-21swapper/307:42:583
220834099350,1cyclictest0-21swapper/310:14:003
220834099350,1cyclictest0-21swapper/309:13:593
220834099350,1cyclictest0-21swapper/307:56:593
2208335993532,2cyclictest0-21swapper/211:47:592
2208335993532,2cyclictest0-21swapper/208:48:592
220833599350,1cyclictest0-21swapper/208:34:542
4577091340,5ptp4l441ktimers/311:00:013
4577091340,5ptp4l441ktimers/311:00:013
2208340993432,1cyclictest0-21swapper/312:07:593
2208340993432,1cyclictest0-21swapper/311:52:593
2208340993432,1cyclictest0-21swapper/309:46:593
2208340993432,1cyclictest0-21swapper/309:42:593
2208335993431,2cyclictest0-21swapper/211:53:592
2208340993331,1cyclictest0-21swapper/311:36:593
2208340993331,1cyclictest0-21swapper/311:08:593
2208340993331,1cyclictest0-21swapper/310:05:593
2208340993331,1cyclictest0-21swapper/309:52:593
2208340993331,1cyclictest0-21swapper/307:37:593
2208335993331,1cyclictest0-21swapper/211:04:592
2208335993328,4cyclictest0-21swapper/212:19:552
220833599330,31cyclictest0-21swapper/207:36:592
2208340993230,1cyclictest0-21swapper/312:24:593
2208340993230,1cyclictest0-21swapper/311:03:003
2208340993230,1cyclictest0-21swapper/310:42:583
2208340993230,1cyclictest0-21swapper/310:28:593
2208340993230,1cyclictest0-21swapper/310:00:593
2208340993230,1cyclictest0-21swapper/309:22:593
2208340993230,1cyclictest0-21swapper/308:13:593
2208335993229,2cyclictest0-21swapper/212:08:592
2208335993229,2cyclictest0-21swapper/211:15:592
2208330993221,2cyclictest171rcu_preempt07:10:000
2208335993128,2cyclictest0-21swapper/210:16:592
2208335993128,2cyclictest0-21swapper/210:03:002
2208335993128,2cyclictest0-21swapper/208:29:552
2208335993128,2cyclictest0-21swapper/207:44:552
220833599310,29cyclictest0-21swapper/207:26:592
2208335993028,1cyclictest0-21swapper/212:35:012
4577091290,7ptp4l441ktimers/307:20:003
4577091290,5ptp4l441ktimers/308:05:013
2208340992927,1cyclictest0-21swapper/312:16:593
2208340992927,1cyclictest0-21swapper/309:05:143
220834099290,28cyclictest0-21swapper/310:30:123
220834099290,27cyclictest0-21swapper/310:15:143
220834099290,27cyclictest0-21swapper/309:35:013
220834099290,27cyclictest0-21swapper/307:50:133
220834099290,27cyclictest0-21swapper/307:50:123
2208335992927,1cyclictest0-21swapper/211:25:002
2208335992926,2cyclictest0-21swapper/208:44:562
220833599290,28cyclictest0-21swapper/207:10:172
220833599290,27cyclictest0-21swapper/210:15:002
220833599290,27cyclictest0-21swapper/209:00:022
220833599290,1cyclictest0-21swapper/211:40:142
4577091280,7ptp4l61490irq/134-eno1-TxRx-012:00:003
4577091280,6ptp4l61490irq/134-eno1-TxRx-008:45:003
4577091280,5ptp4l441ktimers/307:15:003
220834099280,2cyclictest0-21swapper/308:45:123
220834099280,27cyclictest0-21swapper/308:25:583
220834099280,26cyclictest0-21swapper/310:20:103
2208335992826,1cyclictest0-21swapper/209:06:582
220833599280,26cyclictest0-21swapper/212:20:142
220833599280,26cyclictest0-21swapper/211:55:132
220833599280,26cyclictest0-21swapper/209:40:142
4577091270,6ptp4l441ktimers/311:30:003
2208335992724,2cyclictest0-21swapper/210:52:592
2208335992723,2cyclictest0-21swapper/208:03:002
4577091260,6ptp4l441ktimers/312:39:563
4577091260,5ptp4l441ktimers/309:29:553
4577091260,4ptp4l441ktimers/309:35:003
2208340992624,1cyclictest0-21swapper/308:35:593
2208335992623,2cyclictest0-21swapper/210:24:002
2208335992623,2cyclictest0-21swapper/209:51:592
2208335992623,2cyclictest0-21swapper/209:12:592
2208335992623,2cyclictest0-21swapper/208:12:592
220833599260,2cyclictest0-21swapper/209:27:592
220833599260,2cyclictest0-21swapper/207:58:582
4577091250,5ptp4l441ktimers/307:49:563
2208335992523,1cyclictest0-21swapper/209:00:002
2208335992523,1cyclictest0-21swapper/208:07:592
2208335992523,1cyclictest0-21swapper/207:30:132
2208335992522,2cyclictest0-21swapper/211:35:122
2208335992422,1cyclictest0-21swapper/211:05:142
2208335992421,2cyclictest0-21swapper/210:55:582
2208335992421,2cyclictest0-21swapper/210:55:582
2208335992321,1cyclictest0-21swapper/210:06:592
2208335992320,2cyclictest0-21swapper/210:29:552
2208335992219,2cyclictest0-21swapper/209:30:152
2208335992118,1cyclictest0-21swapper/210:34:592
2208335992017,2cyclictest0-21swapper/212:01:592
2208340991917,1cyclictest0-21swapper/309:56:593
2208335991916,2cyclictest0-21swapper/211:34:552
2208335991816,1cyclictest0-21swapper/210:47:592
2208335991815,2cyclictest0-21swapper/209:19:002
2208335991513,1cyclictest0-21swapper/211:10:132
22083359941,2cyclictest0-21swapper/207:10:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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