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2026-04-12 - 08:21
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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 Apr 12, 2026 00:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
279809913072,13cyclictest21863-21/usr/sbin/munin23:23:410
280339910150,44cyclictest11863-21sh21:18:002
280339910143,52cyclictest7601-21kernelversion22:58:482
280339910142,52cyclictest2339-21timerwakeupswit20:59:222
280339910036,9cyclictest0-21swapper/220:38:562
27888210015,55sleep127901-21apt-config19:03:261
27888210015,55sleep127901-21apt-config19:03:261
28033999933,12cyclictest0-21swapper/223:23:242
28033999842,9cyclictest0-21swapper/222:24:002
28033999839,12cyclictest0-21swapper/221:13:222
28033999839,12cyclictest0-21swapper/221:13:222
28033999839,12cyclictest0-21swapper/221:13:222
28033999634,13cyclictest0-21swapper/221:18:392
2803399962,36cyclictest15742-21latency_hist20:03:242
28033999444,12cyclictest1-21systemd21:43:562
28033999444,12cyclictest1-21systemd21:43:562
2803399943,38cyclictest13439-21ntp_states22:13:512
2803399943,34cyclictest20932-21fschecks_count20:18:442
28033999431,12cyclictest0-21swapper/223:33:582
28010999471,13cyclictest0-21swapper/120:13:421
28033999344,8cyclictest0-21swapper/200:19:002
28010999372,11cyclictest0-21swapper/120:48:541
28010999370,13cyclictest0-21swapper/122:03:481
161182930,6sleep30-21swapper/320:03:453
28033999134,17cyclictest18388-21cstates21:28:392
28010999171,12cyclictest0-21swapper/119:08:251
28010999170,11cyclictest0-21swapper/119:33:251
28033999024,20cyclictest470-21cut21:53:242
2774929017,47sleep227761-21munin-run19:03:232
2774929017,47sleep227761-21munin-run19:03:232
2803399893,35cyclictest19418-21idleruntime20:13:432
275902896,63sleep00-21swapper/019:01:250
275902896,63sleep00-21swapper/019:01:250
28010998873,8cyclictest0-21swapper/121:33:381
28010998873,8cyclictest0-21swapper/121:33:381
28010998870,9cyclictest0-21swapper/120:48:241
28010998771,8cyclictest0-21swapper/119:43:241
28010998753,13cyclictest181rcu_preempt23:31:231
27980998755,7cyclictest181rcu_preempt23:08:180
27980998755,7cyclictest181rcu_preempt23:08:180
28033998633,10cyclictest0-21swapper/200:14:372
28010998670,7cyclictest0-21swapper/119:09:011
28010998670,7cyclictest0-21swapper/119:09:011
28010998669,8cyclictest0-21swapper/119:58:581
28010998648,8cyclictest181rcu_preempt20:34:001
2778828610,45sleep30-21swapper/319:03:243
2778828610,45sleep30-21swapper/319:03:243
28033998546,10cyclictest27968-21cyclictest19:19:352
28033998538,9cyclictest0-21swapper/222:38:402
2803399853,43cyclictest21941-21apt-get22:28:372
2803399853,43cyclictest21941-21apt-get22:28:372
28010998471,7cyclictest0-21swapper/120:03:491
28010998468,7cyclictest0-21swapper/122:29:541
28010998468,7cyclictest0-21swapper/122:29:541
28010998453,24cyclictest6854-40logrotate23:53:241
28010998445,28cyclictest7401-21kworker/u18:0+nfsiod22:21:221
27980998462,16cyclictest15736-21latency_hist20:03:240
28033998254,18cyclictest803-21sendmail-mta23:40:192
2803399823,35cyclictest24907-21ssh22:33:512
28010998241,9cyclictest181rcu_preempt21:18:381
28033998130,15cyclictest13608-21ntp_kernel_pll_23:08:522
28033998119,30cyclictest16582-21switchtime22:18:552
28010998168,7cyclictest0-21swapper/120:23:451
28010998168,7cyclictest0-21swapper/120:23:451
28010998140,7cyclictest181rcu_preempt20:23:241
27980998154,17cyclictest24096-21latency_hist21:38:250
27980998154,17cyclictest24096-21latency_hist21:38:250
28033998057,14cyclictest300-21rs:main2
2803399803,33cyclictest24514-21fschecks_time21:38:452
27980998061,14cyclictest7786-21sh22:58:510
27980998060,14cyclictest4943-21sh22:53:560
27980998018,26cyclictest15-21ksoftirqd/021:05:180
28010997963,11cyclictest27968-21cyclictest22:38:471
28010997958,14cyclictest28343-21netstat23:33:491
28010997958,14cyclictest27968-21cyclictest20:08:511
28010997954,8cyclictest181rcu_preempt19:48:411
27980997957,14cyclictest1382-21idleruntime21:54:030
27980997946,12cyclictest9720-21kworker/u17:2-ext4-rsv-conversion23:18:240
28033997860,11cyclictest32172-21kworker/u17:1-rpciod23:53:402
2803399783,60cyclictest27755-21apt-get19:03:382
2803399783,31cyclictest2795-21diskmemload23:30:162
28033997754,17cyclictest30600-21sendmail00:33:212
28033997754,17cyclictest30600-21sendmail00:33:212
28033997747,22cyclictest544-21cron19:28:222
28033997747,22cyclictest544-21cron19:28:222
28033997735,13cyclictest181rcu_preempt23:13:322
28033997630,29cyclictest2795-21diskmemload22:58:212
28010997659,10cyclictest1162-21apt-key22:48:251
28010997659,10cyclictest1162-21apt-key22:48:251
27980997662,9cyclictest13902-21/usr/sbin/munin00:03:550
27980997661,9cyclictest23132-21unixbench_multi22:30:270
27980997661,9cyclictest23132-21unixbench_multi22:30:270
27980997656,14cyclictest30369-21cut22:43:230
28033997553,16cyclictest31127-21switchtime20:48:572
28010997555,14cyclictest544-21cron23:53:261
28010997548,9cyclictest31-21ksoftirqd/123:12:001
28010997544,9cyclictest181rcu_preempt22:38:101
28010997541,8cyclictest181rcu_preempt21:04:291
27980997555,14cyclictest18871-21apt-key00:13:230
27980997538,9cyclictest181rcu_preempt20:28:370
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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