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2026-04-06 - 22:26
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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 Mon Apr 06, 2026 12:44:39)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3329910556,14cyclictest181rcu_preempt11:53:580
3559910477,19cyclictest18225-21sh12:04:052
326372976,18sleep20-21swapper/207:03:292
355999463,23cyclictest16359-21sh09:18:462
355999361,12cyclictest181rcu_preempt11:24:042
355999042,16cyclictest435-21ssh12:28:502
355999028,20cyclictest0-21swapper/208:35:142
340999066,17cyclictest10307-21awk09:08:441
340999066,17cyclictest10307-21awk09:08:441
340998863,19cyclictest7284-21latency_hist07:23:471
355998661,18cyclictest323-21cyclictest07:34:062
355998661,18cyclictest323-21cyclictest07:34:062
332998657,21cyclictest24269-21kworker/u19:1+events_unbound08:33:430
355998554,22cyclictest20765-21sh11:14:052
313472858,52sleep131366-21cpu06:59:031
340998443,30cyclictest3164-21processes07:09:181
332998445,31cyclictest994-21threads11:34:180
355998346,12cyclictest181rcu_preempt07:18:592
340998364,13cyclictest2952-21systemd-journal10:14:411
355998251,22cyclictest4313-21/usr/sbin/munin08:54:152
340998256,18cyclictest26380-21sh10:29:031
332998258,15cyclictest1874-21systemd-run09:48:440
355998155,14cyclictest0-21swapper/210:48:542
355998154,20cyclictest8850-21latency_hist07:28:462
355998146,8cyclictest181rcu_preempt11:34:162
340998158,15cyclictest20280-21kworker/u17:1-xprtiod10:44:111
340998151,21cyclictest5202-21apt-config09:53:471
340998144,28cyclictest28043-21grep12:19:221
340998144,28cyclictest28043-21grep12:19:221
340998111,57cyclictest23772-21apt-get11:18:561
332998162,13cyclictest23991-21/usr/sbin/munin12:13:540
332998146,12cyclictest181rcu_preempt08:03:070
332998146,12cyclictest181rcu_preempt08:03:070
332998134,36cyclictest20659-21cpuspeed08:04:000
355998060,12cyclictest10815-21ssh11:51:112
355998050,10cyclictest181rcu_preempt09:33:562
340998055,18cyclictest15301-21fschecks_count11:59:051
332998041,9cyclictest0-21swapper/007:44:180
355997956,12cyclictest0-21swapper/210:54:002
355997956,12cyclictest0-21swapper/210:54:002
355997952,18cyclictest12912-21kworker/u17:3-rpciod10:44:182
355997943,16cyclictest181rcu_preempt11:58:462
355997943,16cyclictest181rcu_preempt10:01:472
355997930,25cyclictest19527-21latency_hist09:23:472
355997930,25cyclictest19527-21latency_hist09:23:472
340997956,16cyclictest24650-21timerwakeupswit08:14:191
355997854,15cyclictest9292-21fschecks_time07:29:062
355997853,13cyclictest0-21swapper/207:18:472
355997850,12cyclictest58-21kcompactd009:42:172
340997858,14cyclictest3145-21latency_hist12:33:471
340997836,12cyclictest181rcu_preempt07:08:441
340997836,12cyclictest181rcu_preempt07:08:441
33299783,60cyclictest87-21kswapd009:54:050
33299783,51cyclictest15720-21apt-get07:49:130
33299783,51cyclictest15720-21apt-get07:49:130
3162727825,28sleep30-21swapper/306:59:143
297912780,15sleep3451rcuc/309:39:333
355997748,18cyclictest17848-21ssh10:14:122
34099779,31cyclictest0-21swapper/109:29:211
33299777,32cyclictest15-21ksoftirqd/008:44:050
332997744,8cyclictest0-21swapper/010:28:470
332997738,12cyclictest181rcu_preempt09:52:350
332997733,25cyclictest181rcu_preempt09:34:200
355997650,20cyclictest5188-21apt-key09:53:482
355997648,20cyclictest21335-21threads08:04:182
355997643,12cyclictest181rcu_preempt10:08:042
355997643,12cyclictest181rcu_preempt10:08:042
355997631,10cyclictest181rcu_preempt10:38:432
340997660,10cyclictest20227-21ntp_offset09:24:131
340997651,17cyclictest11895-21fschecks_time10:59:051
340997640,28cyclictest31831-21sh10:38:431
332997644,10cyclictest181rcu_preempt08:33:560
332997643,12cyclictest181rcu_preempt11:47:460
332997641,11cyclictest16317-21latency_hist09:18:470
332997620,24cyclictest181rcu_preempt11:03:460
35999753,57cyclictest5670-21chrt08:58:433
355997549,16cyclictest0-21swapper/211:23:202
355997543,8cyclictest39-21ksoftirqd/211:03:432
355997534,19cyclictest0-21swapper/207:49:202
355997534,19cyclictest0-21swapper/207:49:202
355997529,26cyclictest20853-21ntp_offset10:19:132
340997554,15cyclictest7301-21diskmemload10:07:381
340997554,15cyclictest7301-21diskmemload10:07:381
340997552,13cyclictest28646-21sh09:39:001
340997512,23cyclictest11302-21latency_hist10:58:461
340997512,23cyclictest11302-21latency_hist10:58:461
332997556,10cyclictest31822-21cron10:38:430
33299755,48cyclictest23772-21apt-get11:19:060
332997544,10cyclictest181rcu_preempt11:04:000
332997544,10cyclictest181rcu_preempt11:04:000
332997535,12cyclictest181rcu_preempt07:08:510
332997534,21cyclictest323-21cyclictest11:28:470
332997533,17cyclictest181rcu_preempt11:39:050
332997533,17cyclictest181rcu_preempt11:39:050
35999743,57cyclictest9165-21taskset10:54:103
35999743,57cyclictest9165-21taskset10:54:103
35999743,54cyclictest13228-21taskset11:54:303
35999742,37cyclictest28938-21chrt11:27:473
355997459,9cyclictest13280-21sh09:13:432
35599745,38cyclictest16989-21awk10:13:442
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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