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2026-06-17 - 06:55
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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 Wed Jun 17, 2026 00:44:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
317439912043,23cyclictest24324-21modprobe20:13:560
317439911439,8cyclictest0-21swapper/021:09:280
30391211217,68sleep030469-21fschecks_time18:54:210
317439911180,25cyclictest16181-21kernelversion21:14:230
3266821100,6sleep20-21swapper/222:34:512
3266821100,6sleep20-21swapper/222:34:512
317439911035,8cyclictest0-21swapper/019:08:550
317439911033,8cyclictest0-21swapper/022:15:120
317439911028,70cyclictest0-21swapper/019:19:170
31743991102,31cyclictest19643-21sendmail23:08:550
31743991102,31cyclictest19643-21sendmail23:08:550
31743991073,32cyclictest13588-21fschecks_time22:04:200
317439910717,32cyclictest10932-21sh19:33:560
317439910551,45cyclictest0-21swapper/023:53:580
317439910534,7cyclictest0-21swapper/000:21:430
317439910534,7cyclictest0-21swapper/000:21:430
31743991053,44cyclictest3099-21expr23:34:130
31743991044,35cyclictest9549-21ntp_states23:44:280
31743991044,35cyclictest9549-21ntp_states23:44:280
2553921040,8sleep20-21swapper/223:18:042
87721030,5sleep30-21swapper/319:03:583
31743991033,38cyclictest30188-21seq22:31:160
31743991033,37cyclictest30263-21/usr/sbin/munin23:24:330
317439910234,8cyclictest0-21swapper/021:24:180
31743991022,38cyclictest5915-21acpi23:39:050
317599910133,28cyclictest4786-21modprobe20:53:552
317439910133,13cyclictest0-21swapper/021:53:580
317439910133,13cyclictest0-21swapper/021:53:580
317439910131,12cyclictest0-21swapper/022:09:040
317439910034,8cyclictest0-21swapper/022:03:550
317439910033,8cyclictest0-21swapper/019:59:330
317439910033,11cyclictest0-21swapper/022:59:120
317439910030,10cyclictest0-21swapper/023:09:550
317439910026,11cyclictest0-21swapper/000:02:200
31743991002,32cyclictest4912-21rm22:43:590
3174399993,33cyclictest21614-21find00:04:290
3174399993,33cyclictest21614-21find00:04:290
31743999931,15cyclictest0-21swapper/019:49:310
31743999925,15cyclictest0-21swapper/020:44:330
31743999925,15cyclictest0-21swapper/020:44:330
3174399992,34cyclictest638-21ssh23:30:160
3174399992,34cyclictest638-21ssh23:30:160
31743999835,8cyclictest0-21swapper/023:19:310
31759999740,30cyclictest0-21swapper/221:48:582
31743999728,15cyclictest31731-21cyclictest21:08:580
31743999726,22cyclictest24240-21kworker/u17:2+nfsiod21:20:580
3174399972,33cyclictest3707-21fschecks_time20:49:160
3174399972,33cyclictest27058-21grep20:19:320
3174399972,33cyclictest27058-21grep20:19:320
3174399972,23cyclictest12697-21ssh22:56:160
31743999722,21cyclictest4697-21ssh22:43:570
31743999718,22cyclictest29803-21cut00:18:590
31759999637,49cyclictest0-21swapper/222:39:252
3174399963,43cyclictest17883-21/usr/sbin/munin19:54:220
3174399963,36cyclictest352-21runrttasks00:10:180
3174399963,34cyclictest6613-21latency_hist20:58:590
3174399963,34cyclictest6613-21latency_hist20:58:590
3174399963,33cyclictest3935-21ls19:09:290
31743999632,7cyclictest0-21swapper/019:14:220
31759999542,45cyclictest0-21swapper/220:43:592
31759999517,58cyclictest32498-21sh23:29:182
31759999517,58cyclictest32498-21sh23:29:182
3174399953,34cyclictest8384-21head21:54:360
3174399953,34cyclictest22475-21apt-get20:09:000
3174399952,35cyclictest13933-21grep19:39:310
3174399952,35cyclictest13933-21grep19:39:310
31759999445,41cyclictest0-21swapper/223:43:582
3174399944,28cyclictest25980-21memory22:24:240
3174399943,34cyclictest32643-21/usr/sbin/munin20:39:170
3174399943,33cyclictest27699-21acpi21:34:060
3174399943,32cyclictest8546-21/usr/sbin/munin22:49:250
3174399943,32cyclictest25144-21latency_hist22:23:580
3174399943,32cyclictest25144-21latency_hist22:23:580
3174399943,31cyclictest7938-21/usr/sbin/munin19:24:230
3174399943,23cyclictest15818-21timerandwakeup23:54:350
3174399943,23cyclictest15818-21timerandwakeup23:54:350
3174399942,22cyclictest31879-21timerwakeupswit20:34:340
31743999411,33cyclictest362-21grep18:59:330
3037329425,40sleep30-21swapper/318:54:203
112342940,8sleep30-21swapper/321:05:433
31759999339,46cyclictest0-21swapper/222:54:342
3174399933,34cyclictest25107-21if_eth021:29:190
31743999330,13cyclictest0-21swapper/023:14:330
31759999242,43cyclictest0-21swapper/220:29:342
31759999242,42cyclictest0-21swapper/220:58:592
31759999242,42cyclictest0-21swapper/220:58:592
31759999237,48cyclictest31731-21cyclictest19:43:582
31759999237,48cyclictest31731-21cyclictest19:43:582
31759999233,8cyclictest0-21swapper/220:28:562
31759999228,11cyclictest0-21swapper/200:14:062
31759999226,25cyclictest32382-21cron20:38:552
3174399923,31cyclictest352-21runrttasks21:46:170
31759999140,44cyclictest0-21swapper/221:38:402
31759999136,48cyclictest0-21swapper/223:59:322
31759999136,48cyclictest0-21swapper/223:49:322
31759999135,49cyclictest0-21swapper/221:28:582
31759999132,8cyclictest0-21swapper/222:33:562
31743999171,12cyclictest0-21swapper/000:28:540
31759999042,41cyclictest0-21swapper/220:14:282
31759999034,50cyclictest0-21swapper/221:15:472
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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