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2026-04-26 - 01:22
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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 Sat Apr 25, 2026 12:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2207211810,76sleep22240-21proc_pri06:58:102
2989211311,67sleep12991-21apt-get07:02:291
32699910859,42cyclictest16251-21sendmail11:52:262
295721076,16sleep00-21swapper/007:02:200
3269991065,88cyclictest18730-21apt-get07:47:412
32699910414,71cyclictest30239-21taskset10:27:492
32699910414,71cyclictest30239-21taskset10:27:492
32609910038,54cyclictest0-21swapper/110:03:011
3269999933,29cyclictest0-21swapper/212:17:222
3260999938,9cyclictest0-21swapper/109:03:051
3260999938,9cyclictest0-21swapper/109:03:051
326099993,70cyclictest32142-21ssh12:17:511
3260999730,15cyclictest0-21swapper/112:02:481
3260999730,15cyclictest0-21swapper/112:02:481
3260999650,39cyclictest27828-21latency_hist11:17:291
3260999638,12cyclictest22599-21kworker/u17:1-rpciod09:32:511
3260999638,12cyclictest22599-21kworker/u17:1-rpciod09:32:511
3260999578,11cyclictest30242-21sh10:27:501
3260999578,11cyclictest30242-21sh10:27:501
3260999538,11cyclictest0-21swapper/112:22:521
3260999537,50cyclictest0-21swapper/108:57:501
3260999537,13cyclictest14575-21kworker/u17:0+events_unbound10:09:261
3260999536,16cyclictest8743-21latency_hist07:17:311
326099953,36cyclictest6440-21grep07:08:061
3260999526,13cyclictest0-21swapper/111:42:521
3260999526,13cyclictest0-21swapper/111:42:521
328399945,76cyclictest30214-21taskset10:27:463
328399945,76cyclictest30214-21taskset10:27:463
3260999437,12cyclictest0-21swapper/109:48:051
3260999429,11cyclictest0-21swapper/110:57:501
3269999332,49cyclictest0-21swapper/210:07:312
326999932,60cyclictest10886-21seq10:48:472
3260999333,9cyclictest0-21swapper/111:58:571
3260999332,13cyclictest0-21swapper/110:42:291
3269999210,46cyclictest0-21swapper/211:42:262
3260999229,15cyclictest0-21swapper/109:52:541
3260999229,15cyclictest0-21swapper/109:52:541
326099922,47cyclictest19631-21ntp_states11:03:001
326099922,38cyclictest23647-21apt-config08:02:311
3260999218,33cyclictest17653-21sh11:53:411
326099913,39cyclictest1486-21latency_hist11:27:311
326099913,37cyclictest10433-21apt-get07:22:401
326099913,36cyclictest29126-21fschecks_count08:17:501
326099913,34cyclictest8917-21grep08:53:031
326099913,34cyclictest30627-21cstates08:22:451
326099913,34cyclictest30627-21cstates08:22:451
326099912,37cyclictest21260-21grep07:53:051
326099903,43cyclictest839-21cat08:28:551
326099903,42cyclictest26273-21/usr/sbin/munin09:28:011
326099903,40cyclictest23806-21/usr/sbin/munin08:04:101
326099903,38cyclictest28138-21timerwakeupswit08:13:051
326099903,35cyclictest6108-21modprobe08:47:271
326099903,35cyclictest18454-21cat07:47:301
3260999026,19cyclictest0-21swapper/109:58:001
3250999040,9cyclictest181rcu_preempt11:37:380
326999893,68cyclictest32067-21apt-get12:17:512
326099897,44cyclictest10019-21rm10:47:451
326099894,37cyclictest5126-21diskmemload11:32:541
326099894,37cyclictest5126-21diskmemload11:32:541
3260998937,44cyclictest0-21swapper/111:12:311
3260998937,44cyclictest0-21swapper/111:12:311
326099893,37cyclictest18934-21grep07:48:081
326099893,32cyclictest15132-21latency_hist07:37:301
326099893,32cyclictest15132-21latency_hist07:37:301
3260998928,12cyclictest0-21swapper/107:22:111
3269998819,34cyclictest10981-21diskmemload09:50:132
326099884,32cyclictest25649-21/usr/sbin/munin08:07:391
326099884,32cyclictest25649-21/usr/sbin/munin08:07:391
326099883,34cyclictest352-21runrttasks10:15:381
326099883,34cyclictest352-21runrttasks10:15:381
326099883,32cyclictest12452-21latency07:27:551
326099882,28cyclictest13625-21rm10:52:591
326999872,53cyclictest9104-21seq10:46:362
326999872,53cyclictest9104-21seq10:46:362
326999872,46cyclictest31509-21ssh11:22:532
326099874,35cyclictest20296-21/usr/sbin/munin09:18:041
326099873,38cyclictest1349-21ntp_offset10:32:571
326099873,35cyclictest10176-21rm11:42:171
326099873,33cyclictest1778-21fschecks_time08:32:491
3260998732,12cyclictest0-21swapper/109:23:051
326099872,37cyclictest29127-21fschecks_time12:12:491
326099872,33cyclictest352-21runrttasks12:07:571
3250998750,9cyclictest181rcu_preempt12:02:400
3250998750,9cyclictest181rcu_preempt12:02:400
3269998645,36cyclictest0-21swapper/211:12:272
3269998645,36cyclictest0-21swapper/211:12:272
3269998641,37cyclictest0-21swapper/210:55:082
326099864,35cyclictest3435-21fschecks_time08:37:511
326099863,35cyclictest15262-21/usr/sbin/munin07:37:461
326099863,35cyclictest15262-21/usr/sbin/munin07:37:461
326099863,31cyclictest352-21runrttasks11:20:081
326099854,32cyclictest6089-21latency12:27:541
326099854,32cyclictest6089-21latency12:27:541
326099853,34cyclictest7571-21switchtime10:43:021
326099853,34cyclictest7571-21switchtime10:43:021
3269998462,16cyclictest18231-21munin-plugin-st07:47:292
3269998418,56cyclictest16821-21apt-get11:52:452
326099844,37cyclictest3670-21cat07:03:041
3250998445,12cyclictest181rcu_preempt09:22:410
3250998440,33cyclictest1-21systemd10:32:280
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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