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2026-05-08 - 12:23
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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 rackbslot7.osadl.org (updated Fri May 08, 2026 00:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
224721498,24sleep20-21swapper/218:57:142
33479912843,58cyclictest0-21swapper/200:26:532
32949912151,17cyclictest10363-21latency_hist19:21:390
3322991192,97cyclictest2937-21apt-get21:41:591
3322991192,97cyclictest2937-21apt-get21:41:591
3360991182,44cyclictest25501-21chrt23:11:513
3322991184,92cyclictest27133-21apt-get22:21:511
32949911650,14cyclictest27900-21kworker/u17:1+xprtiod21:35:320
32949911650,14cyclictest27900-21kworker/u17:1+xprtiod21:35:320
32949911650,14cyclictest27900-21kworker/u17:1+xprtiod21:35:320
3294991163,52cyclictest30106-21/usr/sbin/munin20:22:020
32949911348,20cyclictest22185-21ssh21:19:480
3294991133,35cyclictest15002-21switchtime23:47:140
293721107,84sleep00-21swapper/019:00:220
32949910946,16cyclictest15792-21ssh21:08:460
33479910883,15cyclictest3279-21cyclictest23:11:412
32949910847,14cyclictest4005-21ssh23:29:480
33479910347,40cyclictest3279-21cyclictest23:50:592
3322991013,73cyclictest17428-21apt-get23:51:561
297121006,16sleep10-21swapper/119:00:471
3347999958,34cyclictest29854-21sh20:21:372
329499987,40cyclictest2937-21apt-get21:41:520
329499987,40cyclictest2937-21apt-get21:41:520
334799953,68cyclictest3063-21apt-get19:01:552
332299952,55cyclictest1143-21apt-get20:31:561
3294999452,9cyclictest17666-21ssh22:58:110
3347999349,38cyclictest0-21swapper/223:46:402
3322999371,14cyclictest20115-21latency_hist19:51:391
332299932,80cyclictest25542-21ssh23:11:591
329499935,30cyclictest25478-21apt-get23:11:590
336099929,68cyclictest20457-21chrt19:52:033
3347999267,19cyclictest10636-21kernelversion22:47:022
3322999236,48cyclictest9189-21apt-get21:52:041
3294999277,8cyclictest0-21swapper/023:51:540
3294999274,13cyclictest15350irq/295-2188000.ethernet23:41:540
3294999251,35cyclictest19988-21latency_hist21:16:400
3294999251,35cyclictest19988-21latency_hist21:16:400
3347999163,20cyclictest19960-21gpgv19:51:412
3347999154,33cyclictest3279-21cyclictest23:27:152
329499908,71cyclictest9189-21apt-get21:51:550
3347998923,54cyclictest25478-21apt-get23:11:512
332299892,55cyclictest10695-21apt-get23:41:521
334799887,64cyclictest24515-21ssh22:16:592
3347998867,14cyclictest24511-21unixbench_multi00:02:142
3347998848,34cyclictest5659-21cpu19:06:572
3347998848,34cyclictest5659-21cpu19:06:572
3347998761,18cyclictest20696-21fschecks_count19:52:542
3347998743,36cyclictest0-21swapper/222:01:372
332299873,60cyclictest20434-21apt-get19:52:041
3322998727,33cyclictest10821-21diskmemload21:37:591
3347998642,36cyclictest0-21swapper/221:11:402
3347998638,41cyclictest0-21swapper/222:11:372
332299869,36cyclictest10438-21ls19:21:401
3347998545,33cyclictest0-21swapper/221:46:582
3347998544,34cyclictest0-21swapper/219:31:592
3347998544,34cyclictest0-21swapper/219:31:592
334799853,62cyclictest9281-21ssh21:52:022
3294998521,45cyclictest2558-21cut21:41:400
334799843,70cyclictest0-21swapper/221:36:512
329499847,53cyclictest20629-21apt-get23:56:560
3294998462,16cyclictest298-21in:imuxsock20:56:370
3294998462,16cyclictest298-21in:imuxsock20:56:370
334799837,61cyclictest2398-21apt-get21:41:562
334799837,61cyclictest2398-21apt-get21:41:562
3347998356,17cyclictest8079-21fschecks_time20:51:592
3347998356,17cyclictest8079-21fschecks_time20:51:592
3347998341,35cyclictest0-21swapper/223:17:142
3347998335,36cyclictest17650-21kworker/u17:4-xprtiod23:56:412
3347998252,21cyclictest5946-21timerwakeupswit23:32:132
3322998253,21cyclictest24020-21apt-key22:16:391
3322998253,21cyclictest24020-21apt-key22:16:391
332299822,56cyclictest3630-21kworker/u18:019:02:051
336099814,40cyclictest22850-21taskset21:21:363
3347998163,12cyclictest11085-21ntpd22:16:412
334799813,71cyclictest0-21swapper/219:41:522
334799812,67cyclictest0-21swapper/219:26:482
334799812,67cyclictest0-21swapper/219:26:482
3322998150,22cyclictest352-21runrttasks22:37:111
332299813,62cyclictest4610-21apt-get20:41:531
329499817,67cyclictest24232-21kworker/u19:1+flush-179:019:02:050
3294998164,11cyclictest13324-21rm21:57:180
3294998155,18cyclictest25215-21apt-key23:11:410
3294998142,29cyclictest0-21swapper/022:23:470
225028111,39sleep30-21swapper/318:57:153
3347998049,19cyclictest4109-21apt-get20:41:532
3347998040,34cyclictest17141-21/usr/sbin/munin21:12:122
3347998040,34cyclictest17141-21/usr/sbin/munin21:12:122
334799803,70cyclictest0-21swapper/222:22:462
334799803,48cyclictest3861-21cat00:22:122
334799803,48cyclictest3861-21cat00:22:122
3322998058,16cyclictest8849-21switchtime23:37:121
3322998050,21cyclictest10821-21diskmemload23:02:111
329499803,57cyclictest352-21runrttasks00:29:320
334799799,61cyclictest614-21apt-get20:31:562
334799793,70cyclictest0-21swapper/223:01:502
3347997936,36cyclictest297-21systemd-logind22:06:392
3347997936,36cyclictest297-21systemd-logind22:06:392
3322997956,15cyclictest2374-21systemd-journal19:58:421
3322997954,16cyclictest7271-21/usr/sbin/munin19:12:161
3294997962,11cyclictest10821-21diskmemload22:41:370
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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