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2026-03-29 - 20:27
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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 Sun Mar 29, 2026 12:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40321880,24sleep1402-21df_inode07:00:341
131621327,15sleep00-21swapper/007:01:490
993921010,7sleep29929-21ssh10:54:172
536821010,6sleep10-21swapper/109:50:561
1662999951,8cyclictest181rcu_preempt07:04:442
211092980,7sleep20-21swapper/208:00:442
1658999855,14cyclictest10077-21ssh11:48:191
1658999853,14cyclictest181rcu_preempt10:09:371
1658999853,14cyclictest181rcu_preempt10:09:371
1662999573,17cyclictest1640-21cyclictest09:54:152
1658999549,12cyclictest181rcu_preempt10:06:571
1658999549,12cyclictest181rcu_preempt10:06:571
1658999539,21cyclictest0-21swapper/109:47:091
1658999370,13cyclictest30904-21latency09:39:421
1658999334,11cyclictest1640-21cyclictest11:12:491
1662999151,13cyclictest181rcu_preempt11:53:242
1649999124,35cyclictest0-21swapper/009:30:140
1662999051,11cyclictest181rcu_preempt07:29:192
166299904,62cyclictest1886-21ssh11:34:372
1662998958,9cyclictest181rcu_preempt11:42:022
1662998949,16cyclictest181rcu_preempt08:19:442
1658998961,10cyclictest181rcu_preempt10:33:511
1658998944,15cyclictest181rcu_preempt07:14:431
1658998944,15cyclictest181rcu_preempt07:14:431
1662998853,9cyclictest181rcu_preempt09:54:452
1662998853,9cyclictest181rcu_preempt09:54:452
1658998862,9cyclictest181rcu_preempt07:19:501
1658998862,9cyclictest181rcu_preempt07:19:501
157628814,48sleep21575-21/usr/sbin/munin07:04:192
1662998749,13cyclictest181rcu_preempt07:14:412
1662998749,13cyclictest181rcu_preempt07:14:412
1658998756,17cyclictest181rcu_preempt11:22:541
165899875,56cyclictest1832-21apt-get11:34:321
1662998654,8cyclictest181rcu_preempt10:14:192
1662998654,8cyclictest181rcu_preempt10:14:192
1662998652,8cyclictest181rcu_preempt08:54:322
1662998652,8cyclictest181rcu_preempt08:54:322
1662998651,13cyclictest181rcu_preempt09:18:562
1662998651,13cyclictest181rcu_preempt09:18:562
1662998640,21cyclictest58-21kcompactd008:44:272
1658998628,25cyclictest0-21swapper/108:24:521
1662998568,12cyclictest1640-21cyclictest08:44:192
1662998540,18cyclictest30709-21/usr/sbin/munin10:34:492
1658998553,9cyclictest181rcu_preempt09:10:571
1658998551,7cyclictest181rcu_preempt11:50:191
1662998467,11cyclictest16178-21unixbench_singl07:44:512
1662998448,12cyclictest181rcu_preempt09:12:372
1662998415,45cyclictest39-21ksoftirqd/211:44:542
1658998458,9cyclictest181rcu_preempt09:19:441
1658998451,8cyclictest181rcu_preempt10:54:381
1662998365,12cyclictest16337-21ssh11:04:342
1662998354,7cyclictest181rcu_preempt07:14:172
1662998351,9cyclictest181rcu_preempt09:48:132
1662998350,7cyclictest181rcu_preempt09:24:412
1662998350,7cyclictest181rcu_preempt09:24:412
1662998350,15cyclictest181rcu_preempt11:54:402
1662998347,8cyclictest181rcu_preempt09:00:182
1662998341,9cyclictest0-21swapper/211:10:092
1658998359,18cyclictest8790-21diskmemload09:59:531
1658998357,11cyclictest181rcu_preempt11:00:021
1658998353,14cyclictest181rcu_preempt11:31:401
1658998350,7cyclictest181rcu_preempt07:39:191
1658998350,10cyclictest181rcu_preempt12:09:181
1658998350,10cyclictest181rcu_preempt12:09:181
1658998349,10cyclictest181rcu_preempt12:24:361
1658998330,12cyclictest0-21swapper/112:09:471
1658998329,27cyclictest0-21swapper/107:59:181
1658998329,27cyclictest0-21swapper/107:59:181
166899823,39cyclictest26453-21taskset09:32:293
1662998251,8cyclictest181rcu_preempt12:17:532
1662998246,10cyclictest181rcu_preempt10:22:042
1662998246,10cyclictest181rcu_preempt10:22:042
1658998232,9cyclictest0-21swapper/110:21:021
1658998232,9cyclictest0-21swapper/110:21:021
1658998226,23cyclictest0-21swapper/112:20:301
1649998217,14cyclictest13828-21sed10:04:530
1649998217,14cyclictest13828-21sed10:04:530
1662998157,11cyclictest0-21swapper/210:44:482
1658998165,10cyclictest1852-21kworker/u17:1+events_unbound11:43:561
1658998162,12cyclictest8790-21diskmemload11:04:541
1658998155,14cyclictest0-21swapper/109:34:191
1658998154,7cyclictest181rcu_preempt12:33:411
1658998153,8cyclictest181rcu_preempt11:56:481
1658998152,20cyclictest24211-21apt-key09:29:191
1658998152,20cyclictest24211-21apt-key09:29:191
1658998148,12cyclictest181rcu_preempt10:39:191
1658998142,22cyclictest0-21swapper/111:18:141
1658998126,21cyclictest0-21swapper/108:00:381
1658998124,13cyclictest0-21swapper/109:34:331
166899808,50cyclictest0-21swapper/311:34:433
166899802,37cyclictest14992-21chrt11:01:523
1662998049,13cyclictest181rcu_preempt07:34:512
1662998048,10cyclictest181rcu_preempt07:49:382
1662998048,10cyclictest181rcu_preempt07:49:382
1662998038,18cyclictest0-21swapper/212:29:172
1658998053,14cyclictest7291-21cpuspeed10:49:331
165899802,36cyclictest31-21ksoftirqd/107:29:321
166899795,52cyclictest0-21swapper/312:25:383
166899793,34cyclictest28987-21chrt09:36:103
1662997960,12cyclictest2952-21systemd-journal10:34:162
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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