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2026-04-23 - 08:36
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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 Thu Apr 23, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23202119911296,12cyclictest2326463-21latency_hist19:30:011
23202099910798,6cyclictest2410051-21kworker/u8:2+flush-179:000:00:010
23202099910596,6cyclictest2341298-21latency_hist20:15:020
23202119910496,6cyclictest2324913-21kworker/u8:2+events_unbound19:30:021
2320209999587,5cyclictest2386116-21latency_hist22:35:010
2320211999383,7cyclictest2320069-21latency_hist19:10:011
2320211999181,7cyclictest2398843-21latency_hist23:15:011
2320211998880,6cyclictest2323278-21latency_hist19:20:011
2320211998578,5cyclictest2390893-21latency_hist22:50:011
2320211998479,4cyclictest2366197-21kworker/u8:0+events_unbound22:05:241
2320209998477,5cyclictest2366744-21kworker/u8:1+flush-179:021:40:000
2320209998372,8cyclictest2352486-21kworker/u8:3+flush-179:021:20:200
2320209998274,5cyclictest2397222-21kworker/u8:0+flush-179:000:05:200
2320211998176,4cyclictest2346113-21kworker/u8:0+events_unbound20:55:251
2320209998173,5cyclictest1213033-21systemd-journal20:05:000
2320211998076,3cyclictest2378402-21kworker/u8:3+flush-179:022:11:061
2320211998075,4cyclictest2352486-21kworker/u8:3+events_unbound21:20:141
2320209998074,4cyclictest2421446-21kworker/u8:2+flush-179:000:30:000
2320211997975,3cyclictest2378401-21kworker/u8:1+events_unbound22:15:201
2320211997973,4cyclictest2373109-21kworker/u8:2+events_unbound22:25:251
2320209997971,6cyclictest2324880-21latency_hist19:25:010
2320211997874,3cyclictest2373109-21kworker/u8:2+events_unbound22:40:221
2320211997868,8cyclictest2381597-21/usr/sbin/munin22:20:221
2320211997773,3cyclictest2306944-21kworker/u8:1+events_unbound19:35:201
2320209997668,5cyclictest2326962-21kworker/u8:3+events_unbound19:40:010
2320211997569,4cyclictest2373109-21kworker/u8:2+flush-179:022:55:041
2320211997470,3cyclictest2323258-21kworker/u8:0+events_unbound20:10:181
2320211997469,4cyclictest2397222-21kworker/u8:0+events_unbound23:20:261
2320209997347,23cyclictest1213033-21systemd-journal21:09:040
2320209997263,6cyclictest2408946-21diskstats23:45:150
2320211997166,4cyclictest2366197-21kworker/u8:0+events_unbound21:50:241
2320211997166,4cyclictest2320108-21kworker/u8:3+events_unbound19:10:131
2320209997163,6cyclictest2402037-21latency_hist23:25:010
2320209997162,7cyclictest2355891-21apt-get21:00:130
2320209997156,13cyclictest2349529-21apt-get20:40:120
2320209997156,13cyclictest2349529-21apt-get20:40:110
2320211997066,3cyclictest2323258-21kworker/u8:0+flush-179:019:20:241
2320211997065,4cyclictest2421446-21kworker/u8:2+flush-179:000:29:561
2320211997065,4cyclictest2352486-21kworker/u8:3+events_unbound21:10:181
2320211996964,4cyclictest2389353-21kworker/u8:0+flush-179:022:50:261
2320211996964,4cyclictest2352486-21kworker/u8:3+flush-179:021:00:261
2320211996963,4cyclictest2352486-21kworker/u8:3+events_unbound21:15:241
2320209996962,4cyclictest2323258-21kworker/u8:0+flush-179:019:30:160
2320211996863,4cyclictest2369989-21kworker/u8:3+flush-179:021:45:261
2320211996863,4cyclictest2352486-21kworker/u8:3+flush-179:020:54:551
2320209996855,10cyclictest510-21rs:main0
2320211996762,4cyclictest2397222-21kworker/u8:0+flush-179:000:37:151
2320211996762,4cyclictest2397222-21kworker/u8:0+flush-179:000:37:151
2320211996762,3cyclictest2337877-21kworker/u8:2+events_unbound20:05:151
2320209996758,6cyclictest2421446-21kworker/u8:2+events_unbound00:30:250
2320209996757,7cyclictest2346113-21kworker/u8:0+flush-179:020:35:160
2320211996661,4cyclictest2394053-21kworker/u8:3+flush-179:023:04:561
2320211996661,4cyclictest2358842-21kworker/u8:2+flush-179:021:25:381
2320211996661,4cyclictest2346113-21kworker/u8:0+flush-179:020:30:261
2320209996654,9cyclictest2343931-21kworker/u8:3+flush-179:020:25:010
2320211996560,4cyclictest2366744-21kworker/u8:1+flush-179:021:34:551
2320209996560,3cyclictest2410051-21kworker/u8:2+flush-179:000:00:060
2320209996556,7cyclictest2342893-21latency_hist20:20:010
2320211996459,4cyclictest2394053-21kworker/u8:3+events_unbound23:05:141
2320209996456,6cyclictest2392479-21latency_hist22:55:010
2320209996456,5cyclictest2384529-21latency_hist22:30:010
2320211996359,3cyclictest2397222-21kworker/u8:0+events_unbound23:15:151
2320211996359,3cyclictest2346113-21kworker/u8:0+events_unbound20:35:181
2320211996359,3cyclictest2334658-21kworker/u8:1+flush-179:019:59:551
2320211996358,4cyclictest2373109-21kworker/u8:2+events_unbound21:55:191
2320211996357,4cyclictest2397222-21kworker/u8:0+events_unbound00:03:591
2320209996354,7cyclictest1213033-21systemd-journal22:49:560
2320211996258,3cyclictest2399082-21kworker/u8:1+events_unbound23:40:271
2320211996257,3cyclictest2366197-21kworker/u8:0+events_unbound22:00:191
2320211996251,9cyclictest2416931-21apt-get00:10:131
2320211996157,3cyclictest2397222-21kworker/u8:0+events_unbound23:45:171
2320209996154,5cyclictest2306944-21kworker/u8:1+events_unbound19:15:250
2320209996153,6cyclictest2374985-21latency_hist22:00:010
2320211996056,3cyclictest2386101-21kworker/u8:1+events_unbound22:35:281
2320211996055,4cyclictest2399082-21kworker/u8:1+events_unbound23:26:061
2320211996055,4cyclictest2329884-21kworker/u8:2+flush-179:019:47:051
2320209996051,7cyclictest2382431-21kworker/u8:0+flush-179:022:35:230
2320211995955,3cyclictest2323258-21kworker/u8:0+events_unbound20:17:041
2320211995954,4cyclictest2419833-21kworker/u8:3+flush-179:000:19:541
2320211995954,4cyclictest2358259-21kworker/u8:1+events_unbound21:05:231
2320211995854,3cyclictest2413401-21kworker/u8:3+flush-179:000:09:561
2320209995852,5cyclictest2406852-21kworker/u8:3+flush-179:023:44:040
2320209995849,7cyclictest2376579-21latency_hist22:05:010
2320211995752,4cyclictest2397222-21kworker/u8:0+flush-179:000:20:241
2320211995752,4cyclictest2349217-21kworker/u8:2+events_unbound20:40:241
2320211995752,4cyclictest2349217-21kworker/u8:2+events_unbound20:40:231
2320211995652,3cyclictest2329884-21kworker/u8:2+events_unbound19:42:051
2320209995647,7cyclictest2325135-21apt-get19:25:110
2320211995551,3cyclictest2346113-21kworker/u8:0+events_unbound20:47:041
2320211995550,4cyclictest2421446-21kworker/u8:2+events_unbound00:31:151
2320209995550,3cyclictest2336674-21latency_hist20:00:020
2320209995548,5cyclictest2366197-21kworker/u8:0+flush-179:021:55:010
2320209995548,5cyclictest2329884-21kworker/u8:2+flush-179:019:40:210
2320209995444,7cyclictest1213033-21systemd-journal00:15:000
2320211995348,4cyclictest2334662-21kworker/u8:3+events_unbound20:00:221
2320216995246,4cyclictest2365191-21turbostat21:30:003
2320211995241,9cyclictest2413462-40mandb00:00:011
2320209995240,9cyclictest2346113-21kworker/u8:0+events_unbound20:30:250
2320211995146,4cyclictest2397222-21kworker/u8:0+events_unbound23:35:231
2320211995046,3cyclictest2386101-21kworker/u8:1+events_unbound22:33:051
2320209995047,2cyclictest2366744-21kworker/u8:1+events_unbound21:50:000
2320209995044,4cyclictest2386101-21kworker/u8:1+flush-179:022:55:170
2320209995042,6cyclictest2403630-21cron23:30:010
4577091490,9ptp4l441ktimers/319:05:193
2320211994945,3cyclictest2329884-21kworker/u8:2+events_unbound19:52:051
2320211994944,4cyclictest2399082-21kworker/u8:1+flush-179:023:32:041
2320211994844,3cyclictest2343931-21kworker/u8:3+flush-179:020:25:311
2320209994840,5cyclictest1213033-21systemd-journal23:15:440
232020999481,45cyclictest1-21systemd20:26:040
2320211994743,3cyclictest2397222-21kworker/u8:0+events_unbound23:52:271
2320211994743,3cyclictest2397222-21kworker/u8:0+events_unbound23:52:261
2320211994743,3cyclictest2368335-21kworker/u8:2+events_unbound21:43:051
2320209994740,5cyclictest2378402-21kworker/u8:3+events_unbound22:20:010
2320209994739,6cyclictest2352486-21kworker/u8:3+flush-179:021:10:140
2320209994738,7cyclictest1213033-21systemd-journal00:22:220
2320209994737,8cyclictest2331760-21apt-get19:45:110
232020999472,43cyclictest2363591-21turbostat21:29:550
2320209994640,4cyclictest2387981-21apt-get22:40:130
2320209994638,6cyclictest2373109-21kworker/u8:2+events_unbound23:00:230
2320209994638,6cyclictest2369955-21latency_hist21:45:010
2320209994638,6cyclictest2352486-21kworker/u8:3+flush-179:021:15:220
2320209994638,6cyclictest1213033-21systemd-journal20:59:030
2320209994534,9cyclictest2405753-21diskstats23:35:150
2320209994441,2cyclictest2334658-21kworker/u8:1+flush-179:019:55:010
2320209994338,4cyclictest2323258-21kworker/u8:0+flush-179:020:09:040
2320214994234,6cyclictest0-21swapper/219:21:002
2320209994238,3cyclictest2425127-21kworker/u8:1+flush-179:000:35:160
2320209994238,3cyclictest2425127-21kworker/u8:1+flush-179:000:35:150
2320209994236,4cyclictest2366744-21kworker/u8:1+flush-179:021:35:000
2320209994233,7cyclictest2416709-21kworker/u8:2+flush-179:000:15:250
232020999421,36cyclictest2395930-21apt-get23:05:130
2320211994134,5cyclictest2344491-21latency_hist20:25:011
232020999411,38cyclictest2398859-21perf23:15:000
2320209994035,4cyclictest2378402-21kworker/u8:3+flush-179:022:10:220
2320209994034,4cyclictest2320354-21apt-get19:10:090
4577091390,3ptp4l61490irq/134-eno1-TxRx-020:40:143
4577091390,3ptp4l61490irq/134-eno1-TxRx-020:40:133
2320214993934,3cyclictest0-21swapper/219:49:552
2320209993934,3cyclictest2354064-21systemd-run20:55:000
2320209993932,5cyclictest2366197-21kworker/u8:0+flush-179:022:05:200
4577091380,3ptp4l441ktimers/323:45:133
2320214993831,6cyclictest0-21swapper/220:07:592
232021499380,36cyclictest0-21swapper/221:16:592
4577091370,3ptp4l61490irq/134-eno1-TxRx-022:25:143
2320216993732,4cyclictest2419873-21turbostat00:20:003
2320214993734,2cyclictest0-21swapper/222:26:592
2320214993734,2cyclictest0-21swapper/220:14:542
2320211993733,3cyclictest2368335-21kworker/u8:2+events_unbound21:39:571
2320216993634,2cyclictest0-21swapper/320:28:593
2320216993634,1cyclictest0-21swapper/323:04:593
2320216993634,1cyclictest0-21swapper/321:23:583
232021699360,35cyclictest0-21swapper/322:33:593
232021699360,35cyclictest0-21swapper/322:14:553
232021699360,35cyclictest0-21swapper/320:49:543
232021699360,1cyclictest0-21swapper/320:21:593
2320214993633,2cyclictest0-21swapper/221:14:552
2320209993631,4cyclictest2399082-21kworker/u8:1+flush-179:023:54:560
2320209993631,4cyclictest2399082-21kworker/u8:1+flush-179:023:54:550
2320216993533,1cyclictest0-21swapper/319:11:583
232021699350,1cyclictest0-21swapper/322:44:593
2320214993532,2cyclictest0-21swapper/222:50:582
2320214993532,2cyclictest0-21swapper/221:50:592
2320214993532,2cyclictest0-21swapper/221:48:592
2320214993532,2cyclictest0-21swapper/221:08:002
2320214993532,2cyclictest0-21swapper/200:04:552
2320214993431,2cyclictest0-21swapper/223:15:592
2320214993431,2cyclictest0-21swapper/219:38:592
232021499340,27cyclictest0-21swapper/223:40:132
2320216993331,1cyclictest0-21swapper/323:50:593
2320216993331,1cyclictest0-21swapper/323:50:583
2320216993331,1cyclictest0-21swapper/319:34:593
2320216993330,2cyclictest0-21swapper/320:34:003
2320216993330,1cyclictest0-21swapper/323:28:593
2320214993330,2cyclictest0-21swapper/200:32:582
232021499330,1cyclictest0-21swapper/220:25:122
2320214993229,2cyclictest0-21swapper/223:29:552
2320209993226,4cyclictest2382939-21cron22:25:000
2320216993130,1cyclictest0-21swapper/319:59:593
2320216993129,1cyclictest0-21swapper/323:34:563
2320216993126,4cyclictest2387721-21turbostat22:40:003
2320214993128,2cyclictest0-21swapper/219:26:592
2320214993125,5cyclictest0-21swapper/222:15:132
2320209993128,1cyclictest2350843-21kworker/u8:1+events_unbound20:45:190
2320216993028,1cyclictest0-21swapper/322:04:563
2320216993027,2cyclictest0-21swapper/319:50:133
232021699301,1cyclictest0-21swapper/322:45:133
232021699300,28cyclictest0-21swapper/300:30:133
2320214993028,1cyclictest0-21swapper/223:40:002
2320214993027,2cyclictest0-21swapper/222:40:152
2320214993027,2cyclictest0-21swapper/221:55:032
2320214993027,2cyclictest0-21swapper/221:21:592
2320214993027,2cyclictest0-21swapper/220:40:132
2320214993027,2cyclictest0-21swapper/220:40:132
45782912926,1phc2sys0-21swapper/320:10:143
2320216992927,1cyclictest0-21swapper/323:20:003
2320216992927,1cyclictest0-21swapper/322:56:593
232021699290,27cyclictest0-21swapper/321:10:133
232021699290,27cyclictest0-21swapper/300:20:133
232021699290,21cyclictest0-21swapper/321:55:023
2320214992927,1cyclictest0-21swapper/223:34:592
2320214992927,1cyclictest0-21swapper/222:14:592
2320214992927,1cyclictest0-21swapper/219:55:002
2320214992926,2cyclictest0-21swapper/219:31:582
232021499290,27cyclictest0-21swapper/223:50:032
232021499290,27cyclictest0-21swapper/223:50:032
232021499290,27cyclictest0-21swapper/223:45:132
232021499290,27cyclictest0-21swapper/222:20:122
232021499290,27cyclictest0-21swapper/220:45:122
232021499290,27cyclictest0-21swapper/220:30:122
232021499290,27cyclictest0-21swapper/220:20:132
232021499290,27cyclictest0-21swapper/220:15:132
232021499290,27cyclictest0-21swapper/219:15:122
232021499290,27cyclictest0-21swapper/200:20:132
4577091280,7ptp4l61490irq/134-eno1-TxRx-022:55:003
4577091280,6ptp4l61490irq/134-eno1-TxRx-021:20:003
4577091280,6ptp4l61490irq/134-eno1-TxRx-019:50:003
2320216992827,1cyclictest0-21swapper/321:30:593
2320216992826,1cyclictest0-21swapper/321:50:593
2320216992826,1cyclictest0-21swapper/320:05:593
2320216992825,2cyclictest0-21swapper/323:39:543
2320216992825,2cyclictest0-21swapper/319:20:123
2320216992823,4cyclictest2331507-21turbostat19:44:593
232021699280,2cyclictest0-21swapper/300:30:013
232021699280,27cyclictest0-21swapper/321:47:593
232021699280,27cyclictest0-21swapper/320:50:123
232021699280,26cyclictest0-21swapper/322:20:123
232021699280,26cyclictest0-21swapper/322:05:133
232021699280,26cyclictest0-21swapper/320:15:133
2320214992825,2cyclictest0-21swapper/223:23:592
2320214992825,2cyclictest0-21swapper/223:05:132
2320214992825,2cyclictest0-21swapper/222:37:592
2320214992825,2cyclictest0-21swapper/221:36:592
2320214992825,2cyclictest0-21swapper/220:52:002
2320214992825,2cyclictest0-21swapper/220:35:142
2320214992825,2cyclictest0-21swapper/220:00:022
2320214992825,2cyclictest0-21swapper/200:35:592
2320214992825,2cyclictest0-21swapper/200:35:592
232021499280,2cyclictest0-21swapper/222:30:132
232021499280,1cyclictest0-21swapper/219:55:132
4577091270,6ptp4l61490irq/134-eno1-TxRx-021:05:013
4577091270,6ptp4l61490irq/134-eno1-TxRx-019:40:003
4577091270,6ptp4l441ktimers/319:30:003
4577091270,5ptp4l61490irq/134-eno1-TxRx-022:19:553
4577091270,5ptp4l441ktimers/300:40:013
4577091270,5ptp4l441ktimers/300:40:003
2320216992725,1cyclictest0-21swapper/323:20:583
2320216992725,1cyclictest0-21swapper/320:59:553
2320216992725,1cyclictest0-21swapper/320:36:593
232021699270,26cyclictest0-21swapper/323:10:593
232021699270,26cyclictest0-21swapper/319:15:133
2320214992724,2cyclictest0-21swapper/221:28:592
2320214992724,2cyclictest0-21swapper/219:41:592
4577091260,5ptp4l61490irq/134-eno1-TxRx-021:40:013
4577091260,5ptp4l61490irq/134-eno1-TxRx-000:00:013
4577091260,4ptp4l441ktimers/300:14:593
4577091260,3ptp4l441ktimers/321:45:003
2320216992624,1cyclictest0-21swapper/300:07:583
232021699260,25cyclictest0-21swapper/323:45:003
232021499260,24cyclictest0-21swapper/200:17:592
4577091250,3ptp4l61490irq/134-eno1-TxRx-020:04:593
4577091250,3ptp4l441ktimers/323:09:563
232021699250,24cyclictest2358816-21turbostat21:10:003
232021699250,24cyclictest0-21swapper/300:04:593
2320214992522,2cyclictest0-21swapper/222:47:592
2320214992422,1cyclictest0-21swapper/221:41:002
2320214992421,2cyclictest0-21swapper/222:05:592
2320214992219,2cyclictest0-21swapper/223:13:592
2320214992219,2cyclictest0-21swapper/200:10:582
2320214992119,1cyclictest0-21swapper/223:59:592
2320214992117,2cyclictest0-21swapper/222:01:592
2320214992017,2cyclictest0-21swapper/221:04:592
2320214992012,6cyclictest0-21swapper/200:27:002
2320214991916,2cyclictest0-21swapper/221:30:592
2320214991916,1cyclictest0-21swapper/200:05:592
2320209991511,2cyclictest0-21swapper/019:10:010
232021499107,2cyclictest0-21swapper/223:04:002
23202149997,1cyclictest0-21swapper/222:58:592
23202149985,2cyclictest0-21swapper/220:55:582
23202149974,2cyclictest0-21swapper/219:10:302
23202149951,2cyclictest0-21swapper/219:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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