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2025-12-05 - 11:11
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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 Dec 05, 2025 00:44:27)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2293621590,22sleep1291rcuc/119:03:491
243699911665,46cyclictest24347-21cyclictest20:18:322
243699911665,46cyclictest24347-21cyclictest20:18:322
243699911041,15cyclictest0-21swapper/222:29:122
243629910947,46cyclictest31462-21diskmemload22:35:251
598621080,7sleep30-21swapper/321:19:083
598621080,7sleep30-21swapper/321:19:083
24362991064,83cyclictest176-21jbd2/mmcblk2p2-819:23:571
24362991064,83cyclictest176-21jbd2/mmcblk2p2-819:23:571
243699910538,12cyclictest0-21swapper/219:33:352
243699910538,12cyclictest0-21swapper/219:33:352
24369991043,47cyclictest30450-21latency_hist22:58:342
243699910345,9cyclictest0-21swapper/223:58:452
24369991033,39cyclictest8675-21latency_hist19:58:342
2436999994,44cyclictest27182-21switchtime23:49:062
2436999984,39cyclictest19416-21cpuspeed22:38:512
2436999963,43cyclictest355-21runrttasks23:33:502
2436999963,43cyclictest355-21runrttasks23:33:502
24362999430,33cyclictest0-21swapper/121:43:531
24362999430,33cyclictest0-21swapper/121:43:531
24369999366,17cyclictest4904-21timerwakeupswit19:44:092
24362999349,37cyclictest355-21runrttasks20:14:081
24362999349,37cyclictest355-21runrttasks20:14:081
24362999229,33cyclictest0-21swapper/100:33:581
24362999229,33cyclictest0-21swapper/100:33:581
2436999913,43cyclictest24992-21apt20:48:322
24362999158,23cyclictest17419-21fschecks_time20:23:551
24362999126,34cyclictest0-21swapper/123:57:371
24362999126,34cyclictest0-21swapper/123:57:371
2436999909,56cyclictest12326-21apt-get23:23:582
24369999060,21cyclictest4757-21sh00:07:182
2436299903,71cyclictest16247-21apt-get00:28:461
24369998951,23cyclictest10963-21kworker/u18:2+flush-179:022:50:352
24362998963,16cyclictest20860-21netstat20:34:011
24358998760,19cyclictest32360-21switchtime19:29:060
24358998760,19cyclictest32360-21switchtime19:29:060
24358998757,22cyclictest871-21sendmail-mta22:44:090
24369998671,10cyclictest24347-21cyclictest21:19:052
24369998671,10cyclictest24347-21cyclictest21:19:052
2436999864,33cyclictest30053-21apt-get19:24:212
2436999864,33cyclictest30053-21apt-get19:24:212
24369998557,20cyclictest13287-21sh22:28:322
24369998556,21cyclictest31792-40mandb23:58:342
24369998556,21cyclictest31792-40mandb23:58:342
24362998558,19cyclictest13545-21unixbench_multi23:24:461
24362998542,37cyclictest24210-21kworker/u19:1+events_unbound21:53:311
2435899859,28cyclictest27794-21ssh22:53:500
2435899853,61cyclictest15630-21sshd20:18:570
24369998466,12cyclictest31462-21diskmemload00:16:572
24369998459,18cyclictest10568-21latency_hist22:23:352
24362998462,14cyclictest15546-21sh22:31:581
24362998439,33cyclictest0-21swapper/121:58:571
24358998410,64cyclictest30053-21apt-get19:23:570
24358998410,64cyclictest30053-21apt-get19:23:570
24362998342,34cyclictest0-21swapper/121:34:081
2435899837,65cyclictest871-21sendmail-mta23:58:540
24358998355,19cyclictest0-21swapper/022:23:340
2435899833,71cyclictest355-21runrttasks21:13:080
2435899833,71cyclictest355-21runrttasks21:13:080
24369998263,13cyclictest31462-21diskmemload23:09:022
24362998223,50cyclictest369-21ntpd23:49:001
24358998259,15cyclictest2961-21ssh23:07:000
235072829,40sleep00-21swapper/019:04:180
24362998159,16cyclictest3870-21latency_hist19:43:341
24362998140,32cyclictest0-21swapper/120:58:341
24362998140,32cyclictest0-21swapper/120:58:341
2436299812,58cyclictest32647-21cpu23:59:411
24369998059,13cyclictest13313-21cron00:23:312
24369998059,13cyclictest13313-21cron00:23:312
24362998042,32cyclictest0-21swapper/123:04:091
24362998038,34cyclictest0-21swapper/123:29:111
24362998022,48cyclictest0-21swapper/123:13:201
24362997939,33cyclictest0-21swapper/119:34:091
2436299793,48cyclictest16929-21apt20:23:321
24362997928,42cyclictest30561-21memory21:04:011
24358997925,33cyclictest181rcu_preempt23:37:000
24358997925,33cyclictest181rcu_preempt23:37:000
24358997917,28cyclictest0-21swapper/021:29:030
24369997860,12cyclictest31462-21diskmemload21:39:062
24369997847,11cyclictest24228-21kworker/u18:0-rpciod22:08:572
24362997838,33cyclictest0-21swapper/100:24:131
24362997838,32cyclictest0-21swapper/119:09:001
24362997830,41cyclictest0-21swapper/121:13:581
24358997858,14cyclictest24347-21cyclictest20:38:350
24358997854,17cyclictest31462-21diskmemload00:24:050
24358997847,22cyclictest29000-21latency_hist23:53:340
2436999774,40cyclictest3298-21grep21:14:112
24362997741,28cyclictest0-21swapper/123:44:121
24362997735,34cyclictest0-21swapper/121:19:081
24362997735,34cyclictest0-21swapper/121:19:081
24362997729,40cyclictest7154-21sh00:11:001
2435899779,28cyclictest20868-21ssh23:38:490
24358997722,17cyclictest0-21swapper/000:13:480
24374997622,41cyclictest32629-21taskset21:09:073
24374997622,41cyclictest32629-21taskset21:09:073
24369997622,18cyclictest181rcu_preempt20:34:102
24362997637,31cyclictest0-21swapper/121:08:541
24362997637,31cyclictest0-21swapper/121:08:541
2436299763,67cyclictest0-21swapper/122:58:471
24362997634,36cyclictest388-21rm22:04:361
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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