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2026-03-13 - 06:16
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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 376 highest latencies:
System rackeslot6.osadl.org (updated Fri Mar 13, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21722799910493,6cyclictest2215941-21kworker/u8:3+events_unbound21:40:230
2172282999285,5cyclictest2277222-21apt-get00:35:041
2172279999280,9cyclictest266-21systemd-journal00:35:200
2172279998879,6cyclictest2225442-21latency_hist21:55:010
2172282998678,6cyclictest2222272-21latency_hist21:45:011
2172279998578,5cyclictest2180097-21kworker/u8:1+events_unbound19:40:250
2172282998474,8cyclictest2241345-21kworker/u8:1+flush-179:022:45:001
2172282998375,6cyclictest2244537-21latency_hist22:55:011
2172282998173,6cyclictest2255977-21kworker/u8:3+events_unbound23:30:011
2172282998173,6cyclictest2255977-21kworker/u8:3+events_unbound23:30:011
2172279997975,3cyclictest2272450-21kworker/u8:3+events_unbound00:25:220
2172279997970,6cyclictest2266009-21latency_hist00:00:010
217227999791,76cyclictest2267619-21systemd00:04:000
2172279997868,3cyclictest2196280-21kworker/u8:2+events_unbound20:33:220
2172279997868,3cyclictest2196280-21kworker/u8:2+events_unbound20:33:220
2172282997672,3cyclictest2196280-21kworker/u8:2+flush-179:020:45:221
2172279997671,4cyclictest2254340-21kworker/u8:2+events_unbound23:25:250
2172279997671,4cyclictest2254340-21kworker/u8:2+events_unbound23:25:240
2172279997671,4cyclictest2233462-21kworker/u8:2+events_unbound22:40:230
2172279997667,6cyclictest2233419-21latency_hist22:20:010
2172279997571,3cyclictest2269248-21kworker/u8:0+events_unbound00:14:550
2172279997571,3cyclictest2254340-21kworker/u8:2+events_unbound23:44:550
2172279997563,9cyclictest266-21systemd-journal19:50:000
2172282997465,7cyclictest2233655-21/usr/sbin/munin22:20:231
2172282997462,9cyclictest2277222-21apt-get00:35:001
2172282997367,4cyclictest2191236-21kworker/u8:0+flush-179:020:20:151
2172282997268,3cyclictest2241345-21kworker/u8:1+flush-179:022:49:541
2172282997264,5cyclictest2244518-21kworker/u8:2+events_unbound23:10:151
2172282997262,8cyclictest2274267-21/usr/sbin/munin00:25:271
2172282997249,21cyclictest2215941-21kworker/u8:3+flush-179:022:05:011
2172282997164,5cyclictest2242932-21kworker/u8:0+flush-179:023:20:001
2172279997159,9cyclictest266-21systemd-journal21:32:400
2172279997065,4cyclictest2215941-21kworker/u8:3+events_unbound22:20:230
2172279997065,4cyclictest2211105-21kworker/u8:1+events_unbound21:10:240
2172282996965,3cyclictest2180097-21kworker/u8:1+flush-179:019:55:251
2172279996962,5cyclictest2227062-21latency_hist22:00:000
2172279996958,4cyclictest2236634-21kworker/u8:0+events_unbound22:33:210
2172282996861,5cyclictest2220731-21kworker/u8:2+flush-179:021:50:241
2172279996863,4cyclictest2233462-21kworker/u8:2+events_unbound22:25:240
2172282996760,5cyclictest2194664-21kworker/u8:1+flush-179:020:20:001
2172279996762,4cyclictest2225487-21kworker/u8:0+events_unbound22:12:210
2172279996762,4cyclictest2225487-21kworker/u8:0+events_unbound22:12:200
2172279996760,5cyclictest2259376-21latency_hist23:40:000
2172279996661,4cyclictest2194664-21kworker/u8:1+events_unbound20:25:180
217228299651,2cyclictest714-21Xorg19:27:591
2172279996560,4cyclictest2212690-21kworker/u8:0+events_unbound21:24:210
2172279996560,4cyclictest2196280-21kworker/u8:2+events_unbound20:35:290
2172279996560,4cyclictest2191236-21kworker/u8:0+events_unbound20:20:200
2172279996554,9cyclictest2178785-21apt-get19:30:120
2172279996460,3cyclictest2262805-21kworker/u8:3+events_unbound23:49:560
2172279996460,3cyclictest2252173-21kworker/u8:1+events_unbound00:08:230
2172279996460,3cyclictest2244518-21kworker/u8:2+events_unbound22:57:230
2172279996459,4cyclictest2252173-21kworker/u8:1+events_unbound23:50:260
2172282996360,2cyclictest0-21swapper/120:03:591
2172282996357,4cyclictest2264453-21kworker/u8:0+flush-179:023:59:561
2172282996356,5cyclictest2244518-21kworker/u8:2+events_unbound23:00:241
2172282996347,4cyclictest2252173-21kworker/u8:1+events_unbound00:05:011
2172279996359,3cyclictest2167404-21kworker/u8:1+events_unbound19:12:190
2172279996353,3cyclictest2244518-21kworker/u8:2+events_unbound23:13:220
2172282996257,3cyclictest2233462-21kworker/u8:2+flush-179:022:40:021
2172282996257,3cyclictest2167343-21kworker/u8:0+flush-179:019:20:191
2172279996257,4cyclictest2252173-21kworker/u8:1+events_unbound23:16:220
2172279996257,4cyclictest2225487-21kworker/u8:0+events_unbound22:07:450
2172279996253,7cyclictest2252173-21kworker/u8:1+flush-179:023:20:160
2172282996148,12cyclictest2215941-21kworker/u8:3+flush-179:021:59:551
2172279996156,4cyclictest2211105-21kworker/u8:1+events_unbound21:07:360
2172279996152,7cyclictest2241605-21/usr/sbin/munin22:45:230
2172279996055,4cyclictest2191236-21kworker/u8:0+events_unbound20:17:220
2172279996051,7cyclictest2191236-21kworker/u8:0+flush-179:020:15:010
2172282995953,4cyclictest2198174-21kworker/u8:3+flush-179:020:55:221
2172282995952,5cyclictest2198174-21kworker/u8:3+flush-179:021:00:211
2172282995946,10cyclictest266-21systemd-journal21:40:001
217228299591,55cyclictest1-21systemd22:35:011
2172279995955,3cyclictest2233462-21kworker/u8:2+events_unbound22:37:500
2172279995955,3cyclictest2198174-21kworker/u8:3+events_unbound21:04:230
2172279995955,3cyclictest2198174-21kworker/u8:3+events_unbound20:51:230
2172282995852,5cyclictest2212690-21kworker/u8:0+events_unbound21:20:251
2172282995852,4cyclictest2175404-21kworker/u8:3+events_unbound19:45:231
2172279995854,3cyclictest2215941-21kworker/u8:3+events_unbound21:49:220
2172279995853,4cyclictest2252173-21kworker/u8:1+events_unbound23:34:230
2172279995847,9cyclictest2203174-21apt-get20:45:110
2172279995846,10cyclictest2227304-21apt-get22:00:110
2172282995753,3cyclictest2167343-21kworker/u8:0+flush-179:019:10:221
2172282995752,4cyclictest2175404-21kworker/u8:3+flush-179:019:39:551
2172279995745,9cyclictest266-21systemd-journal23:00:210
2172282995650,4cyclictest2196280-21kworker/u8:2+flush-179:020:35:181
2172282995649,5cyclictest2244518-21kworker/u8:2+flush-179:023:00:011
2172279995651,4cyclictest2269248-21kworker/u8:0+events_unbound00:30:020
2172279995651,4cyclictest2269248-21kworker/u8:0+events_unbound00:17:220
2172282995549,3cyclictest2252173-21kworker/u8:1+flush-179:023:35:191
2172279995551,3cyclictest2244518-21kworker/u8:2+events_unbound23:08:210
2172279995551,3cyclictest2180097-21kworker/u8:1+events_unbound20:00:100
2172279995550,4cyclictest2211105-21kworker/u8:1+events_unbound21:15:020
2172279995549,4cyclictest2215941-21kworker/u8:3+events_unbound21:35:020
2172279995546,7cyclictest2206888-21diskstats20:55:160
2172282995449,4cyclictest2198174-21kworker/u8:3+flush-179:021:09:551
2172282995449,3cyclictest2202952-21kworker/u8:0+events_unbound20:50:141
2172282995447,5cyclictest2262805-21kworker/u8:3+events_unbound23:50:191
2172282995421,5cyclictest510-21rs:main1
2172279995449,4cyclictest2175404-21kworker/u8:3+events_unbound20:09:210
2172282995348,3cyclictest2233462-21kworker/u8:2+flush-179:022:25:261
2172279995348,4cyclictest2269248-21kworker/u8:0+events_unbound00:23:210
2172279995348,4cyclictest2215941-21kworker/u8:3+events_unbound21:29:230
2172282995247,3cyclictest2175404-21kworker/u8:3+flush-179:019:30:221
2172282995239,5cyclictest2212759-21kworker/u8:2+flush-179:021:20:001
2172282995137,5cyclictest2262805-21kworker/u8:3+flush-179:000:05:221
2172282995136,13cyclictest2242932-21kworker/u8:0+flush-179:023:20:251
2172279995144,5cyclictest2243208-21apt-get22:50:100
2172279995144,5cyclictest2180097-21kworker/u8:1+events_unbound19:40:010
2172282995043,5cyclictest2167404-21kworker/u8:1+events_unbound19:15:211
4577091490,13ptp4l61490irq/134-eno1-TxRx-019:10:003
2172282994943,4cyclictest2196280-21kworker/u8:2+flush-179:020:40:201
2172282994940,7cyclictest2262824-21latency_hist23:50:011
2172282994940,6cyclictest2225487-21kworker/u8:0+flush-179:022:10:141
2172282994940,6cyclictest2225487-21kworker/u8:0+flush-179:022:10:131
2172282994842,4cyclictest2225487-21kworker/u8:0+events_unbound22:05:201
2172282994742,4cyclictest2175404-21kworker/u8:3+flush-179:019:54:551
2172279994743,3cyclictest2196280-21kworker/u8:2+events_unbound20:40:010
2172282994640,4cyclictest2212690-21kworker/u8:0+flush-179:021:15:001
2172282994638,6cyclictest2256198-21apt-get23:30:101
2172282994637,7cyclictest2269248-21kworker/u8:0+flush-179:000:20:011
2172288994543,1cyclictest0-21swapper/319:46:583
2172282994538,6cyclictest2215941-21kworker/u8:3+events_unbound21:45:251
2172279994540,4cyclictest2167343-21kworker/u8:0+events_unbound19:24:210
2172279994536,7cyclictest2180097-21kworker/u8:1+flush-179:019:50:210
2172282994439,4cyclictest2252173-21kworker/u8:1+events_unbound23:40:241
2172282994438,4cyclictest2272450-21kworker/u8:3+flush-179:000:20:201
2172282994438,4cyclictest2215941-21kworker/u8:3+events_unbound21:30:131
2172282994436,6cyclictest2172137-21latency_hist19:10:011
2172282994433,9cyclictest266-21systemd-journal00:14:591
2172282994237,4cyclictest2175404-21kworker/u8:3+flush-179:020:10:141
2172284994138,2cyclictest0-21swapper/223:03:002
2172282994136,3cyclictest2199763-21systemd-run20:35:001
2172282994136,3cyclictest2199763-21systemd-run20:35:001
2172282994133,6cyclictest2175404-21kworker/u8:3+events_unbound19:40:211
2172279994135,4cyclictest266-21systemd-journal20:00:000
217228899400,39cyclictest2176957-21turbostat19:25:003
2172282994036,2cyclictest714-21Xorg20:07:591
2172288993937,1cyclictest0-21swapper/323:24:553
2172284993936,2cyclictest0-21swapper/222:31:592
2172282993934,4cyclictest2212690-21kworker/u8:0+flush-179:021:25:211
217228499380,35cyclictest0-21swapper/223:44:592
217228499380,1cyclictest0-21swapper/221:56:002
2172288993735,1cyclictest0-21swapper/322:09:553
2172284993734,2cyclictest0-21swapper/220:21:592
2172284993734,2cyclictest0-21swapper/220:04:002
2172284993734,2cyclictest0-21swapper/200:01:592
2172284993733,2cyclictest0-21swapper/223:53:592
2172284993733,2cyclictest0-21swapper/221:27:002
2172284993733,2cyclictest0-21swapper/221:22:592
217228499370,35cyclictest0-21swapper/222:49:002
217228499370,35cyclictest0-21swapper/221:08:592
2172282993734,2cyclictest0-21swapper/123:07:001
217228899360,35cyclictest0-21swapper/322:50:593
217228899360,35cyclictest0-21swapper/321:23:593
2172284993633,2cyclictest0-21swapper/223:31:592
2172284993633,2cyclictest0-21swapper/221:53:002
2172284993633,2cyclictest0-21swapper/221:40:002
4577091350,6ptp4l441ktimers/319:45:013
2172288993533,1cyclictest0-21swapper/321:37:593
2172284993533,1cyclictest0-21swapper/223:14:582
2172284993533,1cyclictest0-21swapper/220:39:552
2172284993532,2cyclictest0-21swapper/220:32:592
2172284993532,2cyclictest0-21swapper/220:32:592
2172284993532,2cyclictest0-21swapper/220:06:592
2172284993531,2cyclictest0-21swapper/219:17:582
217228499350,1cyclictest0-21swapper/200:15:592
2172288993431,2cyclictest0-21swapper/300:30:593
2172284993431,2cyclictest0-21swapper/223:21:002
2172284993431,2cyclictest0-21swapper/219:38:592
2172284993430,2cyclictest0-21swapper/223:45:592
2172284993430,2cyclictest0-21swapper/220:51:592
2172279993430,3cyclictest2177906-21needreboot19:25:190
2172288993331,1cyclictest0-21swapper/322:42:593
2172284993330,2cyclictest0-21swapper/222:19:582
2172284993330,2cyclictest0-21swapper/221:32:592
2172284993330,2cyclictest0-21swapper/220:58:592
2172284993330,2cyclictest0-21swapper/220:48:592
2172284993330,2cyclictest0-21swapper/219:12:592
2172279993329,3cyclictest2167404-21kworker/u8:1+events_unbound19:18:220
2172288993230,1cyclictest0-21swapper/319:32:583
2172284993229,2cyclictest0-21swapper/222:56:582
2172284993229,2cyclictest0-21swapper/222:05:592
2172284993229,2cyclictest0-21swapper/221:15:592
2172284993229,2cyclictest0-21swapper/220:16:592
2172284993229,2cyclictest0-21swapper/219:46:582
2172284993229,2cyclictest0-21swapper/219:26:002
2172284993228,2cyclictest0-21swapper/200:35:592
2172288993129,1cyclictest0-21swapper/321:43:583
2172288993128,2cyclictest0-21swapper/321:09:593
2172284993129,1cyclictest0-21swapper/221:44:592
2172284993128,2cyclictest0-21swapper/222:40:592
2172284993128,2cyclictest0-21swapper/222:00:592
2172284993128,2cyclictest0-21swapper/219:31:582
2172284993127,2cyclictest0-21swapper/222:53:592
217228499310,29cyclictest0-21swapper/222:35:122
2172282993127,2cyclictest2233410-21cron22:20:001
4577091300,7ptp4l441ktimers/322:35:003
4577091300,7ptp4l441ktimers/321:05:003
4577091300,7ptp4l441ktimers/319:15:013
4577091300,6ptp4l441ktimers/320:40:003
217228899300,29cyclictest0-21swapper/322:25:133
217228899300,28cyclictest0-21swapper/323:33:003
217228899300,28cyclictest0-21swapper/320:25:013
2172284993028,1cyclictest0-21swapper/200:00:002
2172284993027,2cyclictest0-21swapper/223:15:132
2172284993027,2cyclictest0-21swapper/220:14:592
2172284993027,2cyclictest0-21swapper/200:27:592
2172284993027,2cyclictest0-21swapper/200:22:582
2172284993027,2cyclictest0-21swapper/200:14:002
2172284993027,2cyclictest0-21swapper/200:06:592
217228499300,2cyclictest0-21swapper/223:35:022
217228499300,2cyclictest0-21swapper/221:45:112
217228499300,28cyclictest0-21swapper/219:50:122
4577091290,7ptp4l61490irq/134-eno1-TxRx-023:50:013
4577091290,7ptp4l61490irq/134-eno1-TxRx-020:15:003
4577091290,7ptp4l441ktimers/320:45:003
4577091290,7ptp4l441ktimers/300:15:003
2172288992927,1cyclictest0-21swapper/319:27:593
217228899290,28cyclictest0-21swapper/323:35:113
217228899290,28cyclictest0-21swapper/323:11:583
217228899290,27cyclictest0-21swapper/323:55:133
217228899290,27cyclictest0-21swapper/321:55:143
2172284992926,2cyclictest0-21swapper/223:28:592
2172284992926,2cyclictest0-21swapper/223:28:582
2172284992926,2cyclictest0-21swapper/219:59:592
2172284992926,2cyclictest0-21swapper/200:30:142
217228499290,27cyclictest0-21swapper/223:05:132
217228499290,27cyclictest0-21swapper/221:00:132
4577091280,7ptp4l441ktimers/323:20:013
4577091280,6ptp4l441ktimers/323:29:593
4577091280,6ptp4l441ktimers/323:29:593
4577091280,6ptp4l441ktimers/323:04:563
4577091280,6ptp4l441ktimers/322:25:013
4577091280,6ptp4l441ktimers/320:20:003
2172288992826,1cyclictest0-21swapper/320:58:003
2172288992826,1cyclictest0-21swapper/320:50:593
2172288992825,2cyclictest0-21swapper/322:15:123
217228899280,2cyclictest0-21swapper/322:10:123
217228899280,2cyclictest0-21swapper/322:10:113
217228899280,27cyclictest2204507-21turbostat20:49:593
217228899280,26cyclictest0-21swapper/321:30:123
217228899280,26cyclictest0-21swapper/321:25:143
217228899280,26cyclictest0-21swapper/320:05:133
217228899280,26cyclictest0-21swapper/319:35:133
2172284992825,2cyclictest0-21swapper/222:20:112
2172284992825,2cyclictest0-21swapper/220:25:022
2172284992825,2cyclictest0-21swapper/219:20:112
217228499280,26cyclictest0-21swapper/222:14:592
217228499280,26cyclictest0-21swapper/222:14:592
4577091270,6ptp4l61490irq/134-eno1-TxRx-020:05:003
4577091270,6ptp4l61490irq/134-eno1-TxRx-020:00:003
4577091270,6ptp4l441ktimers/320:29:563
4577091270,6ptp4l441ktimers/300:20:003
4577091270,5ptp4l441ktimers/323:55:013
4577091270,5ptp4l441ktimers/322:59:563
4577091270,5ptp4l441ktimers/322:39:563
4577091270,5ptp4l441ktimers/300:30:013
2172288992725,1cyclictest0-21swapper/321:17:593
217228899270,26cyclictest0-21swapper/322:00:123
217228899270,26cyclictest0-21swapper/321:49:593
217228899270,26cyclictest0-21swapper/321:10:143
217228899270,1cyclictest0-21swapper/300:35:023
4577091260,5ptp4l441ktimers/323:10:003
4577091260,5ptp4l441ktimers/300:25:003
2172288992624,1cyclictest0-21swapper/323:42:583
2172288992622,3cyclictest2266010-21turbostat00:04:543
2172284992623,2cyclictest0-21swapper/221:13:582
2172284992623,2cyclictest0-21swapper/219:43:592
4577091250,5ptp4l441ktimers/320:34:563
4577091250,5ptp4l441ktimers/320:34:563
2172288992523,1cyclictest0-21swapper/319:52:593
217228899250,2cyclictest0-21swapper/319:16:593
4577091240,4ptp4l61490irq/134-eno1-TxRx-000:09:563
4577091240,3ptp4l61490irq/134-eno1-TxRx-022:49:543
4577091180,3ptp4l441ktimers/321:50:163
2172284991814,2cyclictest0-21swapper/222:26:592
217227999182,11cyclictest2172283-21date19:10:010
2172284991311,1cyclictest0-21swapper/220:43:002
21722849930,2cyclictest0-21swapper/219:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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