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2026-04-10 - 10:22
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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 Fri Apr 10, 2026 00:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1199214310,88sleep01261-21fschecks_time18:59:510
1199214310,88sleep01261-21fschecks_time18:59:510
137721367,86sleep11456-21latency18:59:561
137721367,86sleep11456-21latency18:59:561
103221307,15sleep20-21swapper/218:59:412
103221307,15sleep20-21swapper/218:59:412
24519911645,40cyclictest21786-21sh22:16:372
24319911359,47cyclictest2952-21systemd-journal23:54:420
24319911359,47cyclictest2952-21systemd-journal23:54:420
24319911357,9cyclictest20915-21ssh23:09:050
24319911357,9cyclictest20915-21ssh23:09:050
24319911352,16cyclictest24486-21tune2fs00:09:480
24319911352,16cyclictest24486-21tune2fs00:09:480
2431991114,43cyclictest12644-21cat21:08:320
2431991094,31cyclictest1354-21kworker/u17:3+rpciod22:13:330
24319910939,14cyclictest9301-21switchtime23:44:050
24319910738,11cyclictest0-21swapper/020:19:060
2431991063,41cyclictest5660-21awk20:49:030
2431991063,40cyclictest23377-21latency_hist00:08:330
24319910553,42cyclictest13490-21cron22:03:290
24319910553,42cyclictest13490-21cron22:03:290
2431991054,41cyclictest3214-21latency_hist20:43:320
2431991044,39cyclictest352-21runrttasks21:56:320
2431991033,40cyclictest26949-21xargs23:19:050
2431991033,33cyclictest24872-21/usr/sbin/munin21:29:020
2431991033,33cyclictest24872-21/usr/sbin/munin21:29:020
2431991023,46cyclictest352-21runrttasks23:41:470
2431991013,43cyclictest31694-21switchtime20:29:040
2431991013,40cyclictest29364-21fschecks_time23:23:510
2431991003,39cyclictest2964-21kernelversion19:03:540
2431991003,39cyclictest2964-21kernelversion19:03:540
243199983,41cyclictest21255-21/usr/sbin/munin19:59:070
243199983,41cyclictest21255-21/usr/sbin/munin19:59:070
243199943,35cyclictest23450-21proc_pri22:19:030
243199943,35cyclictest23450-21proc_pri22:19:030
2443999371,16cyclictest2410-21cyclictest20:48:461
2451999274,12cyclictest28348-21ssh21:33:562
2443999246,38cyclictest0-21swapper/123:53:451
2443999246,38cyclictest0-21swapper/123:53:451
2443999045,38cyclictest8395-21fschecks_time19:18:521
2443999028,52cyclictest0-21swapper/123:13:511
2443998938,45cyclictest0-21swapper/119:49:061
2431998971,11cyclictest14367-21systemd-run19:38:310
2431998971,11cyclictest14367-21systemd-run19:38:310
243199894,37cyclictest544-21cron23:18:280
243199893,32cyclictest24470-21/usr/sbin/munin20:08:560
2451998849,32cyclictest0-21swapper/221:03:532
245199882,75cyclictest0-21swapper/220:08:432
2451998768,10cyclictest0-21swapper/223:11:422
2451998768,10cyclictest0-21swapper/223:11:422
2451998746,36cyclictest0-21swapper/219:04:032
2451998746,36cyclictest0-21swapper/219:04:032
244399875,77cyclictest0-21swapper/121:38:421
244399875,77cyclictest0-21swapper/121:38:421
245199863,74cyclictest0-21swapper/220:58:412
244399864,69cyclictest0-21swapper/120:38:431
244399863,70cyclictest0-21swapper/119:53:451
244399863,70cyclictest0-21swapper/119:53:451
244399863,33cyclictest17223-21cut22:08:561
244399862,69cyclictest8125-21ssh21:54:271
2451998562,13cyclictest0-21swapper/220:48:522
2451998536,43cyclictest0-21swapper/222:48:532
245199852,75cyclictest0-21swapper/219:18:412
2443998569,9cyclictest0-21swapper/100:23:571
244399853,71cyclictest18921-21apt-get21:18:411
244399853,71cyclictest18921-21apt-get21:18:411
244399853,36cyclictest14504-21/usr/sbin/munin22:04:021
244399852,34cyclictest17788-21taskset19:48:301
2451998441,35cyclictest0-21swapper/221:55:092
2451998428,47cyclictest0-21swapper/200:28:382
2443998465,11cyclictest0-21swapper/122:48:521
2443998463,11cyclictest0-21swapper/120:43:471
2443998439,36cyclictest0-21swapper/123:38:331
244399843,73cyclictest0-21swapper/120:58:411
244399843,50cyclictest13873-21munin-run22:58:301
2443998430,41cyclictest0-21swapper/123:25:011
244399842,36cyclictest13856-21timerwakeupswit21:09:081
245199833,76cyclictest0-21swapper/222:58:422
245199833,75cyclictest0-21swapper/222:23:422
245199833,70cyclictest0-21swapper/219:23:462
245199833,70cyclictest0-21swapper/219:23:462
245199833,56cyclictest14163-21apt-get23:53:532
245199833,56cyclictest14163-21apt-get23:53:532
2443998352,23cyclictest23518-21kworker/u18:3+nfsiod00:13:591
244399833,37cyclictest29550-21/usr/sbin/munin20:23:501
244399833,37cyclictest29550-21/usr/sbin/munin20:23:501
244399832,38cyclictest32021-21apt-get23:28:401
2431998365,12cyclictest2883-21rm23:33:530
2431998356,19cyclictest1636-21apt21:44:000
2451998262,15cyclictest11998-21switchtime22:54:042
2451998261,14cyclictest0-21swapper/221:16:582
2451998237,40cyclictest0-21swapper/221:08:572
245199823,73cyclictest0-21swapper/219:53:422
245199823,73cyclictest0-21swapper/219:53:422
2443998263,8cyclictest0-21swapper/119:23:561
2443998263,8cyclictest0-21swapper/119:23:561
244399823,8cyclictest0-21swapper/119:14:311
244399823,34cyclictest28770-21/usr/sbin/munin20:19:091
244399822,38cyclictest19676-21snmpd21:23:501
244399822,36cyclictest20070-21ssh23:08:341
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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