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2026-04-20 - 04:53
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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 Mon Apr 20, 2026 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23613789910796,8cyclictest1213033-21systemd-journal20:40:011
23613779910294,6cyclictest2371176-21latency_hist19:40:010
2361378998878,7cyclictest2416256-21latency_hist22:00:001
2361377998876,9cyclictest2455304-40mandb00:00:020
2361377998679,5cyclictest2389184-21latency_hist20:35:010
2361378997970,6cyclictest2395421-21kworker/u8:0+events_unbound21:00:021
2361377997971,5cyclictest2464911-21latency_hist00:30:020
2361378997662,11cyclictest2451866-21apt-get23:50:001
2361377997669,5cyclictest2364517-21latency_hist19:20:010
2361377997568,5cyclictest2372796-21kworker/u8:2+flush-179:020:00:000
2361377997466,6cyclictest2380965-21latency_hist20:10:010
2361377997466,5cyclictest2435686-21latency_hist23:00:010
2361378997364,7cyclictest2372751-21latency_hist19:45:011
2361377997362,9cyclictest2431162-21apt-get22:45:120
2361377997362,9cyclictest1213033-21systemd-journal23:35:000
236137799711,66cyclictest1-21systemd20:00:550
2361378996960,6cyclictest2450272-21latency_hist23:45:011
2361378996960,6cyclictest2361294-21latency_hist19:10:021
2361377996960,5cyclictest2389228-21kworker/u8:0+flush-179:020:35:180
2361378996861,5cyclictest2456958-21latency_hist00:05:011
2361377996859,7cyclictest2451906-21kworker/u8:3+events_unbound00:20:000
2361378996660,4cyclictest1213033-21systemd-journal19:20:551
2361378996658,5cyclictest2434078-21latency_hist22:55:011
2361378996656,7cyclictest2438861-21latency_hist23:10:001
2361378996556,6cyclictest2443644-21latency_hist23:25:011
2361378996352,8cyclictest2369295-21latency_hist19:35:011
2361377996354,6cyclictest2391030-21kworker/u8:2+events_unbound20:45:000
2361378996258,2cyclictest2438896-21kworker/u8:2+flush-179:023:15:001
2361378996247,6cyclictest2377511-21latency_hist20:00:011
2361377996256,4cyclictest2419416-21kworker/u8:1+flush-179:022:20:220
2361378996151,8cyclictest2385781-21http20:25:011
2361377996051,7cyclictest2416808-21diskstats22:00:140
2361378995951,6cyclictest2455304-40mandb00:00:011
2361377995954,3cyclictest2438896-21kworker/u8:2+flush-179:023:15:250
2361378995851,5cyclictest1213033-21systemd-journal19:47:551
2361377995852,4cyclictest2458580-21kworker/u8:2+flush-179:000:25:010
2361377995848,8cyclictest2413328-21apt-get21:50:120
2361377995649,5cyclictest2448686-21latency_hist23:40:010
2361377995646,8cyclictest2442313-21apt-get23:20:130
2361378995547,6cyclictest2392923-21diskstats20:45:161
2361378995447,5cyclictest2417854-21latency_hist22:05:011
2361377995440,12cyclictest1213033-21systemd-journal21:50:000
2361377995435,17cyclictest2445522-21systemd-run23:30:000
2361380995350,2cyclictest0-21swapper/322:13:593
2361377995350,2cyclictest2387579-21kworker/u8:1+flush-179:021:35:000
2361377995346,5cyclictest2410136-21/usr/sbin/munin21:40:170
2361378995242,8cyclictest1213033-21systemd-journal23:53:121
2361377995142,7cyclictest510-21rs:main0
2361377995135,14cyclictest714-21Xorg22:39:580
2361378995045,4cyclictest2458580-21kworker/u8:2+flush-179:000:30:231
2361377995044,5cyclictest2403575-21kworker/u8:0+events_unbound21:25:020
2361377995042,6cyclictest2384117-21kworker/u8:0+events_unbound20:20:000
2361378994944,4cyclictest2391030-21kworker/u8:2+flush-179:021:40:571
2361377994942,5cyclictest2451906-21kworker/u8:3+flush-179:000:05:000
2361377994912,10cyclictest908065-21snmpd21:25:130
4577091480,13ptp4l441ktimers/319:10:013
2361377994742,4cyclictest2430885-21kworker/u8:1+flush-179:023:00:260
2361377994724,20cyclictest0-21swapper/020:55:210
2361378994638,6cyclictest2400333-21latency_hist21:10:011
2361378994638,6cyclictest1213033-21systemd-journal22:41:551
2361377994629,15cyclictest2464925-21turbostat00:34:550
2361377994626,19cyclictest521-21gdbus19:10:220
2361378994535,8cyclictest2440684-21/usr/sbin/munin23:15:231
2361378994535,8cyclictest1213033-21systemd-journal22:45:001
2361377994536,6cyclictest2382551-21latency_hist20:15:020
2361377994534,9cyclictest2418108-21apt-get22:05:110
2361377994521,4cyclictest0-21swapper/023:40:230
236137899441,2cyclictest714-21Xorg19:37:591
2361377994423,3cyclictest2422203-21mailstats22:15:230
236137999430,35cyclictest0-21swapper/222:39:592
236137999430,35cyclictest0-21swapper/221:48:592
2361378994340,1cyclictest2398753-21munin-run21:05:001
2361378994340,1cyclictest2398753-21munin-run21:04:591
2361378994336,6cyclictest1213033-21systemd-journal21:13:551
2361378994322,3cyclictest2447097-21perf23:39:551
2361377994339,3cyclictest2395421-21kworker/u8:0+flush-179:021:00:260
2361377994339,3cyclictest2395421-21kworker/u8:0+flush-179:021:00:260
2361377994336,4cyclictest2374356-21awk19:50:000
2361377994335,6cyclictest2374574-21/usr/sbin/munin19:50:240
2361377994334,6cyclictest1213033-21systemd-journal19:30:250
2361377994325,3cyclictest2366127-21munin-run19:25:000
236137799432,4cyclictest714-21Xorg22:43:580
236137799431,40cyclictest2427712-21munin-run22:35:010
236137999420,1cyclictest0-21swapper/200:39:552
2361378994238,3cyclictest2445529-21systemd-run23:30:001
2361378994228,12cyclictest2387579-21kworker/u8:1+events_unbound21:20:011
2361378994216,24cyclictest484-21dbus-daemon21:50:011
2361377994236,5cyclictest2391030-21kworker/u8:2+flush-179:020:49:550
2361377994236,4cyclictest2387579-21kworker/u8:1+events_unbound21:35:160
2361377994234,6cyclictest2371131-21kworker/u8:0+flush-179:019:40:160
2361377994233,7cyclictest2385883-21store20:25:000
2361380994139,1cyclictest0-21swapper/322:49:003
2361379994133,6cyclictest0-21swapper/200:34:552
2361378994136,4cyclictest2457194-21/usr/sbin/munin00:05:181
2361378994136,4cyclictest2457194-21/usr/sbin/munin00:05:181
2361378994136,4cyclictest2386266-21apt-get20:25:131
2361377994130,9cyclictest2416269-21dump-pmu-power21:59:590
236138099400,39cyclictest2400350-21turbostat21:09:593
236138099400,1cyclictest0-21swapper/323:49:593
2361379994037,2cyclictest0-21swapper/223:20:592
2361378994036,3cyclictest2379180-21apt-config20:05:011
2361378994031,7cyclictest510-21rs:main1
2361378994031,7cyclictest1213033-21systemd-journal00:13:541
2361378994029,9cyclictest2361596-21apt-get19:10:111
2361377994032,6cyclictest2419416-21kworker/u8:1+flush-179:022:25:230
236137799400,3cyclictest2403530-21munin-run21:20:010
236137799400,26cyclictest714-21Xorg23:13:590
2361380993934,4cyclictest2401927-21turbostat21:14:593
236138099390,38cyclictest2406713-21turbostat21:29:593
236137999390,36cyclictest0-21swapper/219:39:552
2361378993933,5cyclictest2430885-21kworker/u8:1+flush-179:023:00:171
2361377993932,5cyclictest2458538-21kworker/u8:0+events_unbound00:15:000
2361377993929,6cyclictest0-21swapper/000:06:580
2361377993929,6cyclictest0-21swapper/000:06:580
236137799390,2cyclictest714-21Xorg21:14:590
2361380993832,5cyclictest2453708-21turbostat23:55:003
236138099380,1cyclictest0-21swapper/322:44:593
236137999380,36cyclictest0-21swapper/219:19:592
236137999380,35cyclictest0-21swapper/200:18:592
236137899381,35cyclictest2425869-21apt-get22:30:031
2361380993734,2cyclictest0-21swapper/320:51:593
2361380993731,5cyclictest2403523-21turbostat21:20:013
2361379993735,1cyclictest0-21swapper/221:54:592
2361379993734,2cyclictest0-21swapper/219:23:592
2361379993734,1cyclictest0-21swapper/221:25:012
2361379993733,2cyclictest0-21swapper/200:30:002
236137999370,1cyclictest0-21swapper/221:05:592
2361378993731,5cyclictest2451906-21kworker/u8:3+flush-179:000:39:561
2361378993731,4cyclictest2435735-21latency_hist23:00:021
2361377993732,3cyclictest2438879-21awk23:10:000
4577091360,28ptp4l441ktimers/322:35:123
2361380993634,1cyclictest0-21swapper/323:44:593
2361380993634,1cyclictest0-21swapper/322:09:563
236138099360,35cyclictest0-21swapper/321:03:593
236138099360,35cyclictest0-21swapper/321:03:593
2361379993633,2cyclictest0-21swapper/220:53:002
236137999360,1cyclictest0-21swapper/220:39:562
2361378993630,5cyclictest2391030-21kworker/u8:2+flush-179:021:40:001
2361378993629,5cyclictest510-21rs:main1
2361378993625,8cyclictest1213033-21systemd-journal00:30:001
2361377993632,2cyclictest0-21swapper/020:50:140
2361377993624,9cyclictest2367707-21latency_hist19:30:010
2361380993533,1cyclictest0-21swapper/320:49:553
2361380993533,1cyclictest0-21swapper/300:29:553
2361380993533,1cyclictest0-21swapper/300:04:553
2361380993531,3cyclictest2427724-21turbostat22:35:013
236138099350,29cyclictest0-21swapper/320:26:003
236138099350,27cyclictest0-21swapper/323:04:593
236138099350,1cyclictest0-21swapper/321:24:563
2361379993533,1cyclictest0-21swapper/222:00:002
2361379993532,2cyclictest0-21swapper/221:44:562
2361379993531,2cyclictest0-21swapper/219:15:002
236137999350,1cyclictest0-21swapper/219:27:592
2361378993532,2cyclictest714-21Xorg20:12:001
2361378993531,3cyclictest2408308-21perf21:35:001
2361378993529,4cyclictest2359833-21kworker/u8:3+flush-179:019:17:001
236137899351,24cyclictest0-21swapper/122:10:221
2361377993529,4cyclictest2419416-21kworker/u8:1+flush-179:022:15:010
2361380993432,1cyclictest0-21swapper/322:04:543
2361380993431,2cyclictest0-21swapper/323:07:003
2361380993428,4cyclictest2367724-21turbostat19:34:563
2361379993431,2cyclictest0-21swapper/222:10:582
236137899349,10cyclictest2413541-21expr21:50:141
2361377993429,3cyclictest2452041-21dpkg23:50:010
2361380993331,1cyclictest0-21swapper/322:24:543
2361380993325,7cyclictest0-21swapper/322:50:143
2361379993330,2cyclictest0-21swapper/220:04:552
236137899336,12cyclictest714-21Xorg20:31:581
2361378993330,2cyclictest714-21Xorg22:27:581
2361378993329,3cyclictest0-21swapper/120:19:591
2361378993326,5cyclictest2403786-21apt-get21:20:141
2361378993316,6cyclictest2304-21lightdm-gtk-gre00:17:591
2361377993328,3cyclictest2387601-21idleruntime-cro20:30:000
4577091320,11ptp4l441ktimers/320:45:003
2361380993229,1cyclictest0-21swapper/300:39:553
2361379993229,2cyclictest0-21swapper/200:13:592
2361378993227,3cyclictest714-21Xorg22:15:581
2361377993227,3cyclictest2468106-21sh00:40:000
236137799321,4cyclictest2399003-21apt-get21:05:130
236137799321,29cyclictest714-21Xorg22:52:590
2361380993129,1cyclictest0-21swapper/322:29:563
2361380993129,1cyclictest0-21swapper/321:40:593
2361380993128,1cyclictest0-21swapper/320:19:563
2361380993126,4cyclictest2390808-21turbostat20:40:013
236138099310,26cyclictest0-21swapper/319:15:133
236138099310,1cyclictest0-21swapper/300:21:593
236138099310,1cyclictest0-21swapper/300:00:023
2361379993129,1cyclictest0-21swapper/220:49:582
2361379993125,2cyclictest0-21swapper/219:55:152
236137999310,29cyclictest0-21swapper/221:25:152
2361378993127,2cyclictest714-21Xorg22:39:001
2361380993028,1cyclictest0-21swapper/323:15:593
2361380993027,2cyclictest0-21swapper/323:39:553
2361380993025,4cyclictest2382560-21turbostat20:15:013
2361380993024,5cyclictest2466521-21turbostat00:35:003
2361379993027,2cyclictest0-21swapper/223:47:002
2361379993027,2cyclictest0-21swapper/222:25:132
2361379993026,2cyclictest0-21swapper/222:46:592
2361379993026,2cyclictest0-21swapper/220:08:592
2361379993025,2cyclictest0-21swapper/223:35:142
236137899308,6cyclictest2424296-21perf22:25:011
236137899307,7cyclictest2380220-21latency20:05:191
236137899300,28cyclictest714-21Xorg23:33:001
4577091290,7ptp4l441ktimers/319:55:013
2361380992927,1cyclictest0-21swapper/319:21:593
2361380992923,5cyclictest0-21swapper/319:11:593
236138099290,28cyclictest0-21swapper/322:55:133
236138099290,27cyclictest0-21swapper/323:20:153
2361379992926,2cyclictest0-21swapper/223:30:122
2361379992926,2cyclictest0-21swapper/221:35:142
2361379992926,2cyclictest0-21swapper/220:55:142
2361379992926,2cyclictest0-21swapper/219:30:142
2361379992925,2cyclictest0-21swapper/220:10:132
236137999290,2cyclictest0-21swapper/223:58:592
236137999290,2cyclictest0-21swapper/223:50:132
236137999290,27cyclictest0-21swapper/223:25:032
236137999290,27cyclictest0-21swapper/222:55:132
236137999290,27cyclictest0-21swapper/222:00:132
236137999290,27cyclictest0-21swapper/220:25:002
236137999290,1cyclictest0-21swapper/222:20:142
2361378992923,4cyclictest2418935-21phc2sys22:05:221
236137899291,2cyclictest714-21Xorg20:42:591
236137899290,15cyclictest0-21swapper/100:25:011
4577091280,7ptp4l441ktimers/320:59:553
4577091280,7ptp4l441ktimers/300:15:003
4577091280,6ptp4l441ktimers/320:25:003
4577091280,6ptp4l441ktimers/319:25:013
4577091280,6ptp4l441ktimers/300:20:003
2361380992826,1cyclictest0-21swapper/323:10:133
2361380992826,1cyclictest0-21swapper/321:55:143
2361380992826,1cyclictest0-21swapper/321:30:143
2361380992825,2cyclictest0-21swapper/319:55:153
236138099280,2cyclictest0-21swapper/323:25:013
236138099280,26cyclictest0-21swapper/319:35:023
2361379992825,2cyclictest0-21swapper/223:10:142
2361379992825,2cyclictest0-21swapper/221:30:132
2361379992825,2cyclictest0-21swapper/219:44:002
2361379992825,1cyclictest0-21swapper/220:20:002
236137999280,26cyclictest0-21swapper/220:41:002
2361378992824,3cyclictest2375031-21hwlatdetect19:50:171
4577091270,6ptp4l61490irq/134-eno1-TxRx-021:40:013
4577091270,6ptp4l441ktimers/320:09:553
2361380992725,1cyclictest0-21swapper/323:30:123
2361380992721,5cyclictest2374358-21turbostat19:49:593
2361380992720,5cyclictest0-21swapper/321:48:593
2361379992724,1cyclictest0-21swapper/220:25:002
236137999270,2cyclictest0-21swapper/223:42:592
4577091260,6ptp4l61490irq/134-eno1-TxRx-020:05:003
4577091260,6ptp4l441ktimers/321:54:563
4577091260,6ptp4l441ktimers/320:34:563
4577091260,5ptp4l441ktimers/300:09:563
4577091260,5ptp4l441ktimers/300:09:563
2361380992624,1cyclictest0-21swapper/322:19:593
2361379992622,2cyclictest0-21swapper/219:50:582
236137999260,2cyclictest0-21swapper/220:31:592
236137999260,2cyclictest0-21swapper/200:06:582
236137999260,2cyclictest0-21swapper/200:06:582
2361378992624,1cyclictest0-21swapper/119:26:591
2361379992522,2cyclictest0-21swapper/222:18:002
2361379992522,2cyclictest0-21swapper/219:47:592
2361379992421,2cyclictest0-21swapper/223:17:592
2361379992421,2cyclictest0-21swapper/222:40:582
2361379992421,2cyclictest0-21swapper/221:17:582
2361377992116,3cyclictest0-21swapper/019:10:020
2361379992017,2cyclictest0-21swapper/221:12:002
2361379992016,2cyclictest0-21swapper/223:07:592
2361379991916,2cyclictest0-21swapper/222:06:592
2361379991916,2cyclictest0-21swapper/200:03:592
4577091180,3ptp4l61490irq/134-eno1-TxRx-019:40:173
2361379991815,2cyclictest0-21swapper/221:00:592
2361379991815,2cyclictest0-21swapper/221:00:582
2361379991713,2cyclictest0-21swapper/222:34:562
2361379991512,2cyclictest0-21swapper/223:01:592
2361379991411,2cyclictest0-21swapper/222:54:592
23613799996,2cyclictest0-21swapper/200:24:592
23613799930,2cyclictest0-21swapper/219:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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