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2026-03-15 - 06:22
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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 15, 2026 00:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4328211013,68sleep04358-21proc_pri19:00:540
52629910838,32cyclictest0-21swapper/100:31:561
52629910838,32cyclictest0-21swapper/100:31:561
5267991072,89cyclictest22395-21kworker/u17:2+ext4-rsv-conversion21:30:382
52629910725,37cyclictest0-21swapper/122:55:161
480821076,15sleep20-21swapper/219:01:292
52629910335,34cyclictest0-21swapper/123:05:421
52629910046,44cyclictest0-21swapper/100:25:281
52629910046,44cyclictest0-21swapper/100:25:281
5262991003,61cyclictest24509-21ntpq22:16:141
5267999712,69cyclictest4400-21diskmemload23:30:342
5262999512,48cyclictest0-21swapper/122:10:341
5262999430,39cyclictest0-21swapper/122:45:131
5262999430,39cyclictest0-21swapper/122:45:131
525799943,67cyclictest8171-21apt-get00:31:250
525799943,67cyclictest8171-21apt-get00:31:250
526799923,57cyclictest23756-21apt-get22:15:562
526299924,53cyclictest0-21swapper/123:45:301
5257999270,14cyclictest13334-21diskmemload22:30:510
5257999247,37cyclictest4335-21apt-get23:30:290
5267999177,10cyclictest4361-21kworker/u18:3+ext4-rsv-conversion00:31:252
5267999177,10cyclictest4361-21kworker/u18:3+ext4-rsv-conversion00:31:252
5262999121,30cyclictest0-21swapper/100:03:201
5257999162,22cyclictest27387-21latency_hist23:15:160
526299902,51cyclictest12217-21seq19:24:291
526299902,51cyclictest12217-21seq19:24:291
525799909,55cyclictest15-21ksoftirqd/023:05:470
5267998946,14cyclictest181rcu_preempt00:01:432
5267998861,19cyclictest24529-21sh21:22:562
526799883,33cyclictest23263-21fschecks_time19:56:072
526299884,70cyclictest0-21swapper/123:50:241
526299884,70cyclictest0-21swapper/123:50:241
526299883,53cyclictest27523-21idleruntime-cro20:10:141
5262998828,32cyclictest0-21swapper/119:54:301
5267998761,18cyclictest20787-21fschecks_time22:10:372
526799873,31cyclictest6836-21latency_hist20:45:172
5267998716,32cyclictest381ktimers/219:25:272
5267998716,32cyclictest381ktimers/219:25:272
5262998728,36cyclictest0-21swapper/121:30:571
5267998663,16cyclictest25936-21fschecks_count21:25:352
5267998638,8cyclictest181rcu_preempt00:25:412
5267998638,8cyclictest181rcu_preempt00:25:412
5267998638,11cyclictest181rcu_preempt22:40:302
5267998638,11cyclictest181rcu_preempt22:40:302
5262998646,33cyclictest0-21swapper/123:15:451
526299863,71cyclictest0-21swapper/122:25:281
526299863,51cyclictest18676-21sh22:06:021
526299862,54cyclictest17124-21seq19:37:131
5257998657,21cyclictest2308-21fschecks_time20:30:360
5267998570,10cyclictest19048-40logrotate23:55:182
5267998570,10cyclictest19048-40logrotate23:55:182
5267998566,13cyclictest25015-21latency23:10:422
526799852,69cyclictest23709-21kworker/u17:3+ext4-rsv-conversion22:45:572
5262998537,36cyclictest0-21swapper/122:45:331
526299852,69cyclictest0-21swapper/119:15:281
526299852,69cyclictest0-21swapper/119:15:281
526299852,44cyclictest29072-21sshd20:11:321
5262998522,31cyclictest0-21swapper/123:31:061
5267998449,15cyclictest3057-21ssh23:28:152
526299843,69cyclictest0-21swapper/119:45:251
526299843,51cyclictest9828-21cron20:55:141
5257998441,22cyclictest181rcu_preempt21:30:390
51412849,41sleep11-21systemd19:05:151
5267998363,15cyclictest22568-21sh21:20:172
5267998357,9cyclictest30543-21/usr/sbin/munin23:20:402
5267998357,9cyclictest30543-21/usr/sbin/munin23:20:402
5267998352,23cyclictest15644-21apt-key19:35:162
5267998352,23cyclictest15644-21apt-key19:35:162
5262998359,15cyclictest21745-21sh21:18:321
5262998359,15cyclictest21745-21sh21:18:321
526299832,52cyclictest3299-21seq00:21:331
526299832,49cyclictest3289-21seq20:34:111
525799832,41cyclictest22493-21apt-config19:55:140
5267998259,9cyclictest181rcu_preempt19:20:162
5267998259,9cyclictest181rcu_preempt19:20:162
5267998257,17cyclictest13039-21idleruntime-cro23:45:122
5267998253,8cyclictest28094-21ssh00:10:142
5267998248,14cyclictest181rcu_preempt19:55:172
5267998232,29cyclictest0-21swapper/220:00:272
526299822,49cyclictest18984-21seq19:42:231
526299822,47cyclictest32056-21cat21:35:301
525799823,49cyclictest15-21ksoftirqd/019:13:350
5257998227,28cyclictest15-21ksoftirqd/000:11:120
5267998158,16cyclictest5248-21cyclictest20:23:552
5267998147,13cyclictest181rcu_preempt20:20:162
526299815,65cyclictest0-21swapper/122:35:271
526299815,65cyclictest0-21swapper/122:35:271
526299813,48cyclictest22709-21ssh21:20:281
5262998133,42cyclictest0-21swapper/119:10:191
526299812,73cyclictest0-21swapper/121:25:291
5267998054,17cyclictest8734-21fschecks_count21:50:362
5262998034,37cyclictest5074-21ssh21:45:011
5262998031,41cyclictest0-21swapper/121:45:241
5262998026,27cyclictest0-21swapper/100:15:491
526299802,48cyclictest11515-21seq20:57:441
526299802,48cyclictest11515-21seq20:57:441
525799804,32cyclictest15-21ksoftirqd/020:25:280
525799804,32cyclictest15-21ksoftirqd/020:25:280
5267997956,16cyclictest544-21cron21:00:132
5267997956,16cyclictest544-21cron21:00:132
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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