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2026-03-12 - 09:18
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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 Thu Mar 12, 2026 00:44:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
834621309,89sleep08159-21/usr/sbin/munin19:00:510
9659991143,81cyclictest2022-21apt-get00:15:401
9659991143,81cyclictest2022-21apt-get00:15:401
9659991072,74cyclictest15111-21ssh21:55:491
9659991013,38cyclictest21614-21fschecks_count22:06:101
96599910051,42cyclictest0-21swapper/122:15:481
9659999933,13cyclictest0-21swapper/122:10:501
9659999933,13cyclictest0-21swapper/122:10:501
9654999982,10cyclictest5581-21apt-get21:40:420
95702999,63sleep19599-21sed19:05:291
965999983,37cyclictest12366-21latency_hist22:45:281
965999983,37cyclictest12366-21latency_hist22:45:281
9659999744,10cyclictest0-21swapper/100:26:011
965999968,48cyclictest18892-21apt-get22:55:581
965999963,39cyclictest25402-21latency19:50:501
9659999538,10cyclictest0-21swapper/122:36:021
965999944,40cyclictest13991-21rm23:40:561
965999944,40cyclictest13991-21rm23:40:561
9659999442,15cyclictest9642-21cyclictest21:26:291
9659999412,40cyclictest2523-21fschecks_time20:20:471
9659999336,13cyclictest0-21swapper/123:35:401
9667999265,19cyclictest28011-21idleruntime-cro20:00:262
965999923,36cyclictest10181-21latency_hist20:45:281
9659999214,33cyclictest4848-21cat23:25:501
9654999236,11cyclictest181rcu_preempt21:35:410
965999913,43cyclictest16547-21diskmemload21:41:441
9659999127,24cyclictest31672-21uname00:10:511
965499902,63cyclictest15032-21apt-get21:55:460
966799893,73cyclictest20196-21apt-get19:35:422
965999892,79cyclictest900-21kworker/u17:1+ext4-rsv-conversion21:45:551
965999892,79cyclictest900-21kworker/u17:1+ext4-rsv-conversion21:45:551
9654998955,11cyclictest181rcu_preempt20:15:550
82602899,56sleep28310-21cstates19:00:452
9667998866,16cyclictest16547-21diskmemload21:51:002
965999883,42cyclictest24997-21munin-run00:00:251
9654998859,21cyclictest22055-21ssh23:00:430
9667998665,15cyclictest9347-21sh21:46:442
9667998665,15cyclictest9347-21sh21:46:442
9654998558,7cyclictest181rcu_preempt23:45:070
9654998558,7cyclictest181rcu_preempt23:45:070
9667998414,41cyclictest0-21swapper/223:45:412
9659998465,14cyclictest9642-21cyclictest20:46:011
9667998354,19cyclictest19550-21fschecks_count23:50:452
965999833,34cyclictest4598-21switchtime20:25:581
9654998357,10cyclictest181rcu_preempt00:09:440
9654998351,7cyclictest181rcu_preempt00:30:590
9654998260,14cyclictest298-21in:imuxsock22:51:070
9654998253,9cyclictest181rcu_preempt19:20:410
9654998245,17cyclictest181rcu_preempt23:05:470
967199812,60cyclictest8897-21taskset21:45:553
967199812,60cyclictest8897-21taskset21:45:553
9659998155,17cyclictest19815-21apt-key19:35:281
9654998160,15cyclictest25188-21fschecks_count19:50:460
966799803,68cyclictest15032-21apt-get21:55:492
9667998030,32cyclictest30511-21kworker/u17:3-rpciod23:35:582
9659998055,17cyclictest31425-21latency_hist20:10:291
9654998053,17cyclictest11164-21timerwakeupswit20:46:000
9654998051,19cyclictest12795-21sh22:45:420
9654998025,43cyclictest27859-21ssh23:10:410
9667997958,15cyclictest5786-21mailstats00:21:042
966799793,67cyclictest1470-21apt-get00:15:402
966799793,67cyclictest1470-21apt-get00:15:402
9659997959,12cyclictest0-21swapper/123:11:031
9659997943,11cyclictest181rcu_preempt22:30:371
965499798,49cyclictest18325-21apt-get22:55:460
9654997954,7cyclictest181rcu_preempt00:17:530
9654997954,7cyclictest181rcu_preempt00:17:530
9654997927,22cyclictest0-21swapper/021:47:290
9654997927,22cyclictest0-21swapper/021:47:290
965499792,40cyclictest7385-21ssh23:30:380
967199783,41cyclictest0-21swapper/322:05:483
9667997857,15cyclictest16547-21diskmemload23:33:192
966799785,56cyclictest4392-21ssh23:25:352
966799784,38cyclictest0-21swapper/222:40:532
966799784,38cyclictest0-21swapper/222:40:532
9659997841,13cyclictest181rcu_preempt21:15:251
965499783,42cyclictest352-21runrttasks22:44:400
965499783,42cyclictest352-21runrttasks22:44:400
967199773,40cyclictest14092-21chrt23:41:003
967199773,40cyclictest14092-21chrt23:41:003
9667997761,10cyclictest6330-21kernelversion21:41:472
9667997747,21cyclictest14331-21threads20:55:592
9667997747,21cyclictest14331-21threads20:55:592
9667997724,40cyclictest1940-21sh21:35:132
9659997761,9cyclictest6332-21kworker/u17:1-rpciod23:09:101
9659997757,11cyclictest745-21diskmemload22:25:391
9659997757,11cyclictest745-21diskmemload22:25:391
9659997754,14cyclictest32060-21ssh21:30:461
9659997654,16cyclictest16091-21kernelversion22:50:551
9659997644,8cyclictest0-21swapper/119:36:181
9654997660,10cyclictest31740-21ssh22:22:160
9654997656,14cyclictest19973-21apt-key19:35:300
9654997647,11cyclictest181rcu_preempt20:56:060
9654997647,11cyclictest181rcu_preempt20:56:060
9654997632,13cyclictest181rcu_preempt21:20:480
65272760,5sleep09642-21cyclictest22:35:280
966799758,57cyclictest20688-21apt-get22:05:402
9667997559,10cyclictest14823-21kworker/u18:1+flush-179:021:15:432
9667997558,12cyclictest9642-21cyclictest22:29:332
9667997558,12cyclictest9642-21cyclictest22:29:332
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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