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2026-03-12 - 06:29
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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 100 highest latencies:
System rack3slot6.osadl.org (updated Thu Mar 12, 2026 00:45:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
293492950,6chrt29352-21sed21:55:020
293492950,6chrt29352-21sed21:55:010
1879999417,66cyclictest0-21swapper/019:35:200
1879999220,19cyclictest250-21systemd-journal22:16:190
187999918,72cyclictest16040-21apt-get00:20:120
1879999113,62cyclictest0-21swapper/023:55:110
180222900,8chrt18021-21/usr/sbin/munin00:25:200
1879998721,23cyclictest250-21systemd-journal23:11:290
1879998623,20cyclictest250-21systemd-journal20:00:510
1879998623,20cyclictest250-21systemd-journal20:00:500
1879998555,21cyclictest13050irq/23-ehci_hcd21:15:130
1879998512,59cyclictest0-21swapper/020:20:140
1879998419,21cyclictest250-21systemd-journal22:41:240
1879998410,67cyclictest36-21kcompactd023:00:140
1883998311,53cyclictest0-21swapper/123:40:211
1879998338,37cyclictest13418-21apt-get19:40:060
187999833,24cyclictest18707-21munin-run21:25:010
1879998316,61cyclictest250-21systemd-journal22:31:220
1879998313,18cyclictest250-21systemd-journal23:51:070
187999825,22cyclictest443-21rs:main0
187999823,23cyclictest26456-21taskset20:15:130
187999823,22cyclictest20706-21awk20:00:000
187999823,20cyclictest8849-21unixbench_multi22:25:380
187999823,20cyclictest8849-21unixbench_multi22:25:370
1879998213,55cyclictest0-21swapper/000:30:110
187999813,26cyclictest18361-21wc19:50:350
187999813,21cyclictest24093-21ionclean20:09:000
1879998128,47cyclictest9303-21basename19:30:000
1879998118,57cyclictest30943-21cron22:00:010
187999807,18cyclictest16564-21apt-get22:50:130
1879998023,17cyclictest24933-21sort20:10:260
1879998021,20cyclictest10798-21seq00:05:190
187999797,19cyclictest10106-21apt-get21:00:120
187999795,11cyclictest0-21swapper/020:35:010
1879997928,43cyclictest13467-21diskmemload21:10:160
1879997912,58cyclictest0-21swapper/020:35:100
1879997912,56cyclictest0-21swapper/019:30:240
1879997910,20cyclictest20653-21aten2.4-expect21:30:160
1879997910,20cyclictest20653-21aten2.4-expect21:30:150
187999787,20cyclictest25909-21apt-get21:45:120
187999784,66cyclictest31859-21awk22:00:280
187999777,20cyclictest4869-21apt-get20:45:130
187999776,64cyclictest0-21swapper/019:45:390
187999776,18cyclictest24172-21apt-get21:40:140
187999776,17cyclictest3442-21apt-get23:45:150
187999775,64cyclictest3520-21cron19:15:000
187999774,15cyclictest443-21rs:main0
187999774,14cyclictest3822-21sh22:15:000
187999773,67cyclictest14888-21missed_timers00:15:380
1879997721,17cyclictest1244-21grep22:05:310
1879997711,60cyclictest250-21systemd-journal21:06:050
188399767,20cyclictest0-21swapper/120:05:111
187999765,18cyclictest22358-21apt-get21:35:100
187999764,23cyclictest8527-40mandb00:00:040
187999763,66cyclictest30325-21runrttasks23:29:190
187999763,66cyclictest30325-21runrttasks23:29:180
188399758,49cyclictest0-21swapper/100:05:111
1883997511,14cyclictest0-21swapper/120:40:131
187999757,19cyclictest30570-21apt-get23:30:120
187999756,18cyclictest21560-21apt-get00:35:220
187999756,17cyclictest25330-21apt-get23:15:130
187999755,64cyclictest0-21swapper/023:05:220
187999754,13cyclictest3579-21munin-node19:15:020
1879997526,41cyclictest250-21systemd-journal23:21:310
143327516,49sleep00-21swapper/019:07:120
187999747,22cyclictest11273-21apt-get22:35:110
187999746,18cyclictest29959-21apt-get20:25:130
187999746,18cyclictest29959-21apt-get20:25:120
187999744,14cyclictest250-21systemd-journal00:11:120
187999744,14cyclictest250-21systemd-journal00:11:120
187999737,21cyclictest6607-21apt-get20:50:130
187999737,19cyclictest18878-21apt-get21:25:120
187999736,61cyclictest0-21swapper/022:20:190
187999728,30cyclictest14986-21aten2.4-expect22:45:170
187999725,61cyclictest0-21swapper/019:20:320
187999725,17cyclictest1694-21apt-get23:40:140
187999723,14cyclictest32590-21cstates23:35:170
188399716,16cyclictest0-21swapper/100:00:091
1883997110,45cyclictest0-21swapper/119:55:111
187999714,20cyclictest9033-21awk20:55:260
145127133,27sleep10-21swapper/119:07:241
188399697,14cyclictest0-21swapper/119:25:131
1883996914,22cyclictest0-21swapper/100:20:311
1883996911,33cyclictest0-21swapper/121:40:341
188399685,14cyclictest0-21swapper/120:00:161
188399685,14cyclictest0-21swapper/120:00:151
1883996815,30cyclictest500-21snmpd19:40:471
1883996813,22cyclictest30633-21aten2.4-expect23:30:151
1883996731,15cyclictest19369-21awk22:55:341
1883996713,31cyclictest17091-21cat21:20:021
1883996614,28cyclictest29962-21runrttasks20:25:121
1883996614,28cyclictest29962-21runrttasks20:25:121
1883996613,24cyclictest6628-21strings19:20:241
1883996612,22cyclictest0-21swapper/123:45:341
1883996516,19cyclictest26168-21awk23:15:341
1883996516,19cyclictest10422-21needreboot19:30:371
1883996515,20cyclictest11792-21apt-get19:35:101
1883996515,20cyclictest0-21swapper/121:45:171
1883996514,27cyclictest540-21tail22:05:151
1883996514,21cyclictest26460-21apt-get20:15:171
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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