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2026-04-29 - 10:16
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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 Apr 29, 2026 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
25928211613,67sleep125930-21/usr/sbin/munin18:57:321
274009911336,12cyclictest0-21swapper/223:12:372
27400991064,41cyclictest11384-21fschecks_time23:57:362
27400999913,65cyclictest10504-21apt-get23:02:292
2739399993,84cyclictest352-21runrttasks22:37:400
2739399993,84cyclictest352-21runrttasks22:37:400
2740099954,71cyclictest27666-21apt-get22:37:292
2740099954,71cyclictest27666-21apt-get22:37:292
27393999575,12cyclictest12095-21grep23:57:500
27400999367,18cyclictest8078-21/usr/sbin/munin23:52:312
27397999372,8cyclictest0-21swapper/123:02:331
2739799933,67cyclictest24441-21apt-get22:32:331
27400999058,23cyclictest18037-21ssh00:07:502
2739799904,75cyclictest23341-21apt-get00:17:341
271372906,66sleep00-21swapper/019:00:530
27400998962,18cyclictest29700-21ssh21:47:372
2723628914,50sleep227259-21munin-run19:02:142
27400998872,9cyclictest0-21swapper/223:47:142
27400998872,9cyclictest0-21swapper/223:47:142
27400998745,10cyclictest181rcu_preempt22:52:262
2740099874,29cyclictest24915-21latency_hist20:32:172
2740099874,29cyclictest24915-21latency_hist20:32:172
27393998737,28cyclictest15-21ksoftirqd/019:37:490
27393998732,32cyclictest15-21ksoftirqd/020:47:510
2740099865,68cyclictest17705-21kworker/u18:1+ext4-rsv-conversion00:17:372
2740099863,73cyclictest12184-21apt-get22:12:292
2740099863,73cyclictest12184-21apt-get22:12:292
2739399863,59cyclictest23413-21modprobe00:17:350
27393998565,14cyclictest1970-21latency_hist19:22:170
27400998464,14cyclictest28186-21latency_hist23:32:172
27400998460,15cyclictest15049-21mailstats21:22:492
27400998450,13cyclictest181rcu_preempt19:37:492
27397998437,17cyclictest1945-21diskmemload23:17:391
27397998437,17cyclictest1945-21diskmemload23:17:391
2739399846,68cyclictest12217-21ssh22:12:290
2739399846,68cyclictest12217-21ssh22:12:290
27393998429,31cyclictest15-21ksoftirqd/020:57:360
27393998429,31cyclictest15-21ksoftirqd/020:57:360
27400998360,15cyclictest352-21runrttasks00:12:312
27393998363,14cyclictest24132-21latency_hist22:32:160
27400998261,16cyclictest909-21latency_hist22:47:162
27400998261,13cyclictest16904-21latency_hist00:07:162
27397998261,14cyclictest17396-21fschecks_time00:07:361
27397998260,12cyclictest0-21swapper/119:12:131
2739799821,38cyclictest0-21swapper/123:07:421
27400998142,17cyclictest181rcu_preempt20:37:302
27400998142,17cyclictest181rcu_preempt20:37:302
27397998160,14cyclictest614-21fschecks_count19:17:371
27397998159,14cyclictest9949-21latency_hist23:02:161
27397998159,14cyclictest27382-21cyclictest19:26:081
27397998157,17cyclictest13629-21fschecks_count19:57:351
27393998164,11cyclictest2374-21systemd-journal23:04:320
27400998052,10cyclictest181rcu_preempt21:32:272
27400998052,10cyclictest181rcu_preempt21:32:272
27397998056,16cyclictest2374-21systemd-journal21:29:321
2739399803,51cyclictest15-21ksoftirqd/000:26:320
27400997958,14cyclictest1945-21diskmemload22:24:322
27400997958,14cyclictest1945-21diskmemload22:24:322
27400997936,11cyclictest181rcu_preempt20:12:502
27400997931,12cyclictest181rcu_preempt23:49:572
27400997912,30cyclictest2245-21grep22:47:502
27393997938,34cyclictest0-21swapper/023:37:420
27393997936,14cyclictest181rcu_preempt23:29:330
27400997836,14cyclictest0-21swapper/219:17:492
27397997861,12cyclictest2374-21systemd-journal22:39:321
27397997861,12cyclictest2374-21systemd-journal22:39:321
27393997860,12cyclictest352-21runrttasks19:47:400
27393997859,13cyclictest19357-21latency_hist23:17:160
27393997844,28cyclictest544-21cron19:07:140
27393997844,28cyclictest544-21cron19:07:140
2739399782,34cyclictest10258-21cat23:02:170
2739399781,46cyclictest15-21ksoftirqd/022:02:490
27397997757,12cyclictest27382-21cyclictest19:40:041
2739799772,61cyclictest7448-21kworker/u19:1+ext4-rsv-conversion22:13:271
2739799772,61cyclictest7448-21kworker/u19:1+ext4-rsv-conversion22:13:271
27397997721,17cyclictest0-21swapper/121:32:401
27397997721,17cyclictest0-21swapper/121:32:401
27393997761,10cyclictest1945-21diskmemload23:21:250
27393997761,10cyclictest1945-21diskmemload23:21:250
27393997757,14cyclictest32258-21latency_hist21:52:170
27393997753,8cyclictest181rcu_preempt21:43:240
2739399773,44cyclictest15-21ksoftirqd/022:12:180
2739399773,44cyclictest15-21ksoftirqd/022:12:180
27400997656,13cyclictest27382-21cyclictest00:28:062
27400997637,10cyclictest0-21swapper/222:36:142
27397997657,12cyclictest31241-21kworker/u17:3+rpciod23:57:151
27397997655,15cyclictest17071-21latency_hist21:27:151
27397997654,12cyclictest12425-21kworker/u17:2-rpciod22:45:261
27397997652,14cyclictest0-21swapper/123:31:451
27397997619,24cyclictest1945-21diskmemload22:24:011
27397997619,24cyclictest1945-21diskmemload22:24:011
27393997659,12cyclictest20653-21fschecks_time21:32:370
27393997659,12cyclictest20653-21fschecks_time21:32:370
27393997656,14cyclictest1945-21diskmemload23:07:440
27393997654,8cyclictest181rcu_preempt00:03:340
27393997648,20cyclictest4943-21cron19:32:140
27393997633,22cyclictest181rcu_preempt00:07:400
27393997611,36cyclictest15-21ksoftirqd/020:55:590
27400997548,19cyclictest32358-21switchtime23:37:482
2740099753,45cyclictest13578-21sh23:07:302
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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