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2026-08-16 - 12:27
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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 Sun Aug 16, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
170135399152141,8cyclictest1794626-40logrotate00:00:011
170135399147115,21cyclictest1797879-21latency_hist00:10:001
170135399144132,9cyclictest1736503-21latency_hist21:00:011
170135399138127,8cyclictest1733326-21latency_hist20:50:001
170135399132120,8cyclictest1751097-21latency_hist21:45:021
170135099132118,11cyclictest1213033-21systemd-journal23:35:000
170135099130119,8cyclictest1799465-21latency_hist00:15:020
170135099130119,8cyclictest1799465-21latency_hist00:15:020
170135099129122,5cyclictest1762456-21kworker/u8:2+events_unbound22:50:000
170135099127120,5cyclictest1759279-21kworker/u8:0+flush-179:022:15:010
170135099125115,7cyclictest1788004-21latency_hist23:40:000
170135399121106,12cyclictest1213033-21systemd-journal23:00:001
170135399115105,8cyclictest1716070-21apt-get19:55:121
170135099115106,6cyclictest1738105-21latency_hist21:05:010
170135099115105,7cyclictest1707609-21latency_hist19:30:010
170135399113104,7cyclictest1777073-21apt-get23:05:131
170135399113104,6cyclictest1739724-21kworker/u8:1+flush-179:021:20:011
170135399112102,7cyclictest1703062-21kworker/u8:1+flush-179:019:25:001
170135399111101,7cyclictest1802920-21latency_hist00:25:011
170135399110101,6cyclictest1703062-21kworker/u8:1+flush-179:019:45:181
170135099110103,5cyclictest1703062-21kworker/u8:1+flush-179:020:35:240
170135099110101,6cyclictest1752679-21latency_hist21:50:020
170135399109101,5cyclictest1722179-21latency_hist20:15:011
170135099109102,5cyclictest1709447-21kworker/u8:2+flush-179:020:05:170
170135099109101,5cyclictest1789579-21kworker/u8:0+flush-179:023:50:220
170135099109100,6cyclictest1739724-21kworker/u8:1+flush-179:021:20:230
170135099107100,5cyclictest1804551-21kworker/u8:3+flush-179:000:30:240
17013539910696,7cyclictest1789579-21kworker/u8:0+flush-179:023:45:201
17013509910699,4cyclictest1799960-21kworker/u8:2+flush-179:000:20:170
17013539910598,5cyclictest1735165-21kworker/u8:0+flush-179:021:05:221
17013509910597,5cyclictest1695383-21kworker/u8:0+flush-179:019:10:180
17013509910497,5cyclictest1796295-21latency_hist00:05:010
17013509910495,6cyclictest1746055-21latency_hist21:30:010
17013509910397,3cyclictest1739724-21kworker/u8:1+events_unbound21:40:130
17013509910396,5cyclictest1739724-21kworker/u8:1+flush-179:021:35:180
17013509910296,5cyclictest1706057-21kworker/u8:3+events_unbound19:35:020
17013509910296,4cyclictest1753177-21kworker/u8:2+flush-179:021:55:160
17013539910092,6cyclictest1767292-21kworker/u8:1+events_unbound23:05:011
17013539910089,9cyclictest1767497-21/usr/sbin/munin22:35:251
1701353999988,9cyclictest1752688-21apt-get21:50:031
1701353999984,12cyclictest1213033-21systemd-journal23:25:011
1701353999787,8cyclictest1794907-21/usr/sbin/munin00:00:191
1701353999786,8cyclictest1799960-21kworker/u8:2+flush-179:000:15:171
1701350999793,3cyclictest1794693-40gzip00:00:010
1701350999789,5cyclictest1759279-21kworker/u8:0+flush-179:022:20:170
1701353999691,4cyclictest1703062-21kworker/u8:1+flush-179:020:40:151
1701353999686,8cyclictest1706277-21apt-get19:25:121
1701353999587,6cyclictest1804771-21apt-get00:30:131
1701350999484,7cyclictest1801318-21latency_hist00:20:010
1701353999386,5cyclictest1739724-21kworker/u8:1+flush-179:021:35:241
1701353999386,4cyclictest1759279-21kworker/u8:0+events_unbound22:25:001
1701350999384,7cyclictest1762456-21kworker/u8:2+flush-179:022:35:000
1701353999282,8cyclictest1778657-21apt-get23:10:121
1701353999181,8cyclictest1213033-21systemd-journal22:10:001
1701350999184,5cyclictest1735165-21kworker/u8:0+flush-179:021:10:260
1701353999077,12cyclictest1789579-21kworker/u8:0+flush-179:000:15:011
1701353999077,12cyclictest1789579-21kworker/u8:0+flush-179:000:15:011
1701353998983,4cyclictest1759559-21apt-get22:10:121
1701350998983,5cyclictest1783159-21kworker/u8:2+flush-179:023:40:250
1701350998982,5cyclictest1776850-21kworker/u8:3+flush-179:023:15:000
1701350998880,6cyclictest1703062-21kworker/u8:1+events_unbound19:55:010
1701353998772,12cyclictest1783159-21kworker/u8:2+flush-179:023:35:171
1701350998780,5cyclictest1695383-21kworker/u8:0+flush-179:019:20:170
1701350998765,9cyclictest1722434-21apt-get20:15:120
1701353998681,4cyclictest1736552-21kworker/u8:3+flush-179:022:00:291
1701353998676,7cyclictest1744469-21latency_hist21:25:011
1701353998667,18cyclictest1789579-21kworker/u8:0+flush-179:000:25:151
1701358998578,5cyclictest1784833-21turbostat23:30:013
1701350998579,5cyclictest1709447-21kworker/u8:2+flush-179:019:45:000
1701350998573,9cyclictest1769104-21/usr/sbin/munin22:40:230
1701350998573,9cyclictest1769104-21/usr/sbin/munin22:40:230
1701353998477,5cyclictest1759279-21kworker/u8:0+flush-179:022:15:221
1701350998478,4cyclictest1774222-21kworker/u8:0+flush-179:022:55:230
1701350998478,4cyclictest1703062-21kworker/u8:1+flush-179:019:45:210
1701350998472,9cyclictest1759279-21kworker/u8:0+flush-179:022:15:210
1701353998376,5cyclictest1783159-21kworker/u8:2+flush-179:023:40:191
1701353998374,7cyclictest1701214-21latency_hist19:10:021
1701350998377,4cyclictest1709447-21kworker/u8:2+flush-179:020:00:230
1701350998376,5cyclictest1735165-21kworker/u8:0+flush-179:021:10:000
1701353998277,4cyclictest1703062-21kworker/u8:1+flush-179:019:40:001
1701350998274,6cyclictest1789579-21kworker/u8:0+events_unbound00:35:130
1701353998155,24cyclictest1725916-21diskstats20:25:181
1701350998175,3cyclictest1736552-21kworker/u8:3+flush-179:022:00:240
1701350998174,5cyclictest1762456-21kworker/u8:2+events_unbound22:25:240
1701350998173,6cyclictest1774222-21kworker/u8:0+flush-179:023:25:150
1701353998074,4cyclictest1703062-21kworker/u8:1+flush-179:019:30:161
1701353997971,6cyclictest1736552-21kworker/u8:3+events_unbound22:00:011
1701350997872,4cyclictest1774222-21kworker/u8:0+flush-179:023:20:230
1701353997769,5cyclictest1783159-21kworker/u8:2+flush-179:023:25:251
1701353997766,9cyclictest1747643-21latency_hist21:35:001
1701350997772,3cyclictest1767292-21kworker/u8:1+flush-179:022:50:170
1701350997771,4cyclictest1789579-21kworker/u8:0+flush-179:023:45:160
1701350997771,4cyclictest1703062-21kworker/u8:1+flush-179:020:50:200
1701350997771,4cyclictest1703062-21kworker/u8:1+flush-179:020:25:260
1701350997770,5cyclictest1776850-21kworker/u8:3+flush-179:023:15:240
1701353997669,5cyclictest1709447-21kworker/u8:2+flush-179:020:00:181
1701350997566,6cyclictest1213033-21systemd-journal20:30:460
1701350997468,4cyclictest1789579-21kworker/u8:0+flush-179:000:05:240
1701353997266,4cyclictest1695383-21kworker/u8:0+flush-179:019:10:251
1701350997265,6cyclictest1739724-21kworker/u8:1+flush-179:021:30:190
1701353997164,6cyclictest1728527-21kworker/u8:3+flush-179:020:40:011
1701353997164,5cyclictest1767292-21kworker/u8:1+flush-179:022:50:251
1701350997165,4cyclictest1767292-21kworker/u8:1+events_unbound23:05:170
1701353997063,5cyclictest1703062-21kworker/u8:1+flush-179:019:50:221
1701353997060,8cyclictest1752688-21apt-get21:50:001
1701350997066,3cyclictest1774222-21kworker/u8:0+events_unbound23:00:210
1701350997063,5cyclictest1695383-21kworker/u8:0+flush-179:019:15:180
1701353996962,4cyclictest1767292-21kworker/u8:1+flush-179:022:40:151
1701353996962,4cyclictest1767292-21kworker/u8:1+flush-179:022:40:151
1701353996961,6cyclictest1781032-21kworker/u8:1+flush-179:023:15:241
1701353996961,5cyclictest1784797-21kworker/u8:1+flush-179:023:30:211
1701350996962,5cyclictest1762456-21kworker/u8:2+flush-179:022:35:180
1701350996960,6cyclictest1735165-21kworker/u8:0+flush-179:020:55:200
1701353996861,5cyclictest1735165-21kworker/u8:0+flush-179:021:10:221
1701353996761,4cyclictest1762456-21kworker/u8:2+events_unbound22:30:251
1701350996761,4cyclictest1759279-21kworker/u8:0+events_unbound22:10:010
1701350996760,5cyclictest1739724-21kworker/u8:1+flush-179:021:50:210
1701350996760,5cyclictest1709447-21kworker/u8:2+flush-179:020:10:180
1701350996660,3cyclictest1709447-21kworker/u8:2+flush-179:020:00:000
1701353996559,4cyclictest1767292-21kworker/u8:1+events_unbound22:45:161
1701350996357,4cyclictest1739724-21kworker/u8:1+flush-179:021:15:210
1701353996257,4cyclictest1736552-21kworker/u8:3+flush-179:021:29:581
1701353996155,4cyclictest1789579-21kworker/u8:0+flush-179:023:50:221
1701353996153,6cyclictest1764340-21apt-get22:25:111
1701353996153,5cyclictest1709447-21kworker/u8:2+flush-179:020:05:151
1701353996146,13cyclictest1703062-21kworker/u8:1+flush-179:020:15:171
1701350996148,11cyclictest1213033-21systemd-journal19:40:000
1701353995751,4cyclictest1703062-21kworker/u8:1+flush-179:020:30:171
1701353995747,6cyclictest1703062-21kworker/u8:1+flush-179:019:40:171
1701353995650,4cyclictest1703062-21kworker/u8:1+flush-179:020:20:201
1701353995445,7cyclictest1213033-21systemd-journal19:16:591
1701350995347,4cyclictest1709447-21kworker/u8:2+flush-179:020:20:160
1701358995246,4cyclictest1739698-21turbostat21:10:003
1701350995245,6cyclictest1802897-21kworker/u8:1+events_unbound00:27:450
4577091500,13ptp4l441ktimers/319:10:003
1701353994843,4cyclictest1703062-21kworker/u8:1+flush-179:020:50:171
1701353994741,4cyclictest1733043-21kworker/u8:2+flush-179:021:00:201
1701353994639,5cyclictest1807151-21kworker/u8:1+events_unbound00:35:251
4577091450,5ptp4l61490irq/134-eno1-TxRx-019:34:563
170135899410,39cyclictest1788021-21turbostat23:39:593
1701350994136,4cyclictest1703062-21kworker/u8:1+flush-179:020:40:510
170135899400,39cyclictest0-21swapper/320:33:593
170135699400,38cyclictest0-21swapper/220:34:002
170135699400,37cyclictest0-21swapper/222:28:002
170135699400,37cyclictest0-21swapper/219:40:592
170135699400,30cyclictest0-21swapper/221:11:582
1701358993933,5cyclictest1762494-21turbostat22:20:003
170135899390,4cyclictest1764100-21turbostat22:25:003
1701356993936,2cyclictest0-21swapper/223:48:592
170135699390,36cyclictest0-21swapper/223:40:582
170135699390,36cyclictest0-21swapper/221:30:592
170135699390,36cyclictest0-21swapper/220:53:592
170135699390,29cyclictest0-21swapper/219:34:552
1701358993835,2cyclictest0-21swapper/320:08:593
170135899380,1cyclictest0-21swapper/323:14:593
1701356993835,2cyclictest0-21swapper/220:08:582
1701356993834,3cyclictest0-21swapper/221:37:002
170135699380,36cyclictest0-21swapper/223:06:592
170135699380,36cyclictest0-21swapper/221:23:592
170135699380,36cyclictest0-21swapper/219:38:592
170135699380,29cyclictest0-21swapper/220:24:582
1701358993735,1cyclictest0-21swapper/323:48:593
1701358993734,2cyclictest0-21swapper/321:36:593
1701358993733,3cyclictest0-21swapper/323:00:593
170135899370,36cyclictest0-21swapper/322:28:003
170135899370,36cyclictest0-21swapper/321:31:003
170135899370,36cyclictest0-21swapper/319:40:583
170135899370,36cyclictest0-21swapper/300:17:003
1701356993734,2cyclictest0-21swapper/221:16:592
1701356993733,2cyclictest0-21swapper/223:36:592
1701356993733,2cyclictest0-21swapper/223:00:592
1701356993732,2cyclictest0-21swapper/221:52:002
170135699370,35cyclictest0-21swapper/200:17:002
170135699370,2cyclictest0-21swapper/223:50:592
1701358993633,2cyclictest0-21swapper/322:43:593
1701358993633,2cyclictest0-21swapper/322:43:593
1701358993633,2cyclictest0-21swapper/319:22:593
170135899360,35cyclictest0-21swapper/323:40:593
170135899360,35cyclictest0-21swapper/321:23:593
170135899360,29cyclictest0-21swapper/320:53:593
170135899360,1cyclictest0-21swapper/321:11:593
1701356993633,2cyclictest0-21swapper/222:43:592
1701356993633,2cyclictest0-21swapper/222:43:592
1701356993633,2cyclictest0-21swapper/222:01:592
1701356993633,2cyclictest0-21swapper/219:53:592
1701356993633,2cyclictest0-21swapper/219:22:592
1701356993632,2cyclictest0-21swapper/223:32:592
170135699360,34cyclictest0-21swapper/221:08:592
1701358993533,1cyclictest0-21swapper/323:32:593
1701358993533,1cyclictest0-21swapper/322:01:593
1701358993533,1cyclictest0-21swapper/319:53:593
1701358993532,2cyclictest0-21swapper/321:51:593
1701358993532,2cyclictest0-21swapper/300:34:593
1701358993532,2cyclictest0-21swapper/300:08:593
170135899350,1cyclictest0-21swapper/320:24:593
1701356993533,1cyclictest0-21swapper/200:34:592
1701356993532,2cyclictest0-21swapper/200:08:592
1701356993531,2cyclictest0-21swapper/221:41:582
1701356993531,2cyclictest0-21swapper/220:00:592
170135699350,1cyclictest0-21swapper/223:14:592
1701358993431,2cyclictest0-21swapper/321:56:583
1701358993430,2cyclictest0-21swapper/322:46:593
1701358993430,2cyclictest0-21swapper/322:31:593
1701356993431,2cyclictest0-21swapper/221:56:582
1701356993430,2cyclictest0-21swapper/223:23:592
1701356993430,2cyclictest0-21swapper/222:46:592
1701350993432,1cyclictest0-21swapper/020:49:550
1701358993331,1cyclictest0-21swapper/321:41:583
1701358993330,2cyclictest0-21swapper/300:22:583
1701358993329,2cyclictest0-21swapper/322:38:593
1701356993330,2cyclictest0-21swapper/223:28:592
1701356993330,2cyclictest0-21swapper/222:07:592
1701356993329,2cyclictest0-21swapper/200:13:002
1701356993329,2cyclictest0-21swapper/200:12:592
1701358993230,1cyclictest0-21swapper/323:23:593
1701358993230,1cyclictest0-21swapper/322:07:593
1701358993230,1cyclictest0-21swapper/320:00:593
1701358993226,5cyclictest1704463-21sleep19:20:003
1701356993229,2cyclictest0-21swapper/222:38:592
1701356993229,2cyclictest0-21swapper/222:31:592
1701356993229,2cyclictest0-21swapper/200:22:592
170135899316,24cyclictest0-21swapper/320:47:593
1701358993129,1cyclictest0-21swapper/300:13:003
1701358993129,1cyclictest0-21swapper/300:12:593
1701358993128,2cyclictest0-21swapper/323:08:593
1701356993127,2cyclictest0-21swapper/222:17:592
4577091300,7ptp4l441ktimers/323:20:003
4577091300,7ptp4l441ktimers/300:05:013
1701358993027,2cyclictest0-21swapper/323:50:023
170135899300,29cyclictest0-21swapper/321:15:133
1701356993027,2cyclictest0-21swapper/220:25:172
170135699300,29cyclictest0-21swapper/222:20:142
4577091290,7ptp4l61490irq/134-eno1-TxRx-022:55:003
4577091290,7ptp4l61490irq/134-eno1-TxRx-021:30:013
4577091290,6ptp4l61490irq/134-eno1-TxRx-020:15:003
4577091290,6ptp4l441ktimers/320:20:003
4577091290,6ptp4l441ktimers/300:40:003
1701358992926,2cyclictest0-21swapper/320:25:173
170135899290,2cyclictest0-21swapper/321:50:023
170135899290,27cyclictest0-21swapper/300:00:023
1701356992926,2cyclictest0-21swapper/223:55:142
1701356992926,2cyclictest0-21swapper/219:45:142
1701356992926,2cyclictest0-21swapper/219:25:132
1701356992925,3cyclictest0-21swapper/220:40:582
170135699290,27cyclictest0-21swapper/200:37:592
4577091280,5ptp4l441ktimers/319:30:003
1701358992826,1cyclictest0-21swapper/319:45:143
1701358992825,2cyclictest0-21swapper/319:35:153
170135899280,27cyclictest0-21swapper/322:59:593
1701356992825,2cyclictest0-21swapper/221:47:592
1701356992824,2cyclictest0-21swapper/220:46:002
170135699280,27cyclictest0-21swapper/200:00:012
170135699280,26cyclictest0-21swapper/222:59:592
170135699280,25cyclictest0-21swapper/220:18:592
4577091270,6ptp4l441ktimers/319:59:553
4577091270,5ptp4l441ktimers/321:00:023
1701358992724,1cyclictest0-21swapper/320:40:593
1701356992723,2cyclictest0-21swapper/220:11:592
4577091260,5ptp4l61490irq/134-eno1-TxRx-019:14:553
4577091260,5ptp4l441ktimers/322:14:563
4577091260,4ptp4l441ktimers/321:05:013
1701356992622,2cyclictest0-21swapper/223:19:592
170135699260,24cyclictest0-21swapper/221:25:582
4577091250,5ptp4l61490irq/134-eno1-TxRx-020:39:553
4577091250,4ptp4l441ktimers/300:29:553
231999250,14rtkit-daemon908065-21snmpd19:06:300
1701356992522,2cyclictest0-21swapper/219:18:592
1701356992422,1cyclictest0-21swapper/220:59:592
1701356992421,2cyclictest0-21swapper/219:55:152
1701356992321,1cyclictest0-21swapper/200:29:592
1701356992219,2cyclictest0-21swapper/221:01:002
1701356992118,2cyclictest0-21swapper/222:10:132
1701356991816,1cyclictest0-21swapper/222:54:592
17013569990,7cyclictest0-21swapper/220:35:062
17013569990,7cyclictest0-21swapper/219:13:402
17013569930,2cyclictest0-21swapper/219:10:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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