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2026-04-23 - 19:35
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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 Thu Apr 23, 2026 12:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23403217115,117sleep023458-21fschecks_count06:58:010
23791212312,81sleep223825-21proc_pri06:58:162
247289910957,47cyclictest24697-21cyclictest08:17:522
247289910957,47cyclictest24697-21cyclictest08:17:522
247289910243,12cyclictest0-21swapper/208:42:382
24728991023,43cyclictest30235-21latency_hist08:57:392
24708991014,75cyclictest21843-21apt-get10:32:510
24708991014,75cyclictest21843-21apt-get10:32:510
247289910037,12cyclictest0-21swapper/207:27:522
2472899976,31cyclictest21843-21apt-get10:33:402
2472899976,31cyclictest21843-21apt-get10:33:402
24728999735,8cyclictest181rcu_preempt11:37:532
2472899972,52cyclictest30193-21ssh09:53:152
24728999637,10cyclictest0-21swapper/211:32:512
24708999661,8cyclictest181rcu_preempt07:57:570
24708999661,8cyclictest181rcu_preempt07:57:570
232152958,57sleep123226-21acpi06:57:451
24708999253,33cyclictest24841-21/usr/sbin/munin10:38:000
2339929216,46sleep30-21swapper/306:58:003
24720999166,17cyclictest31372-21sh09:53:541
24708999164,18cyclictest30309-21latency_hist07:17:390
24720998866,16cyclictest4517-21sh11:52:101
24720998764,17cyclictest15582-21apt-key08:12:381
24720998764,17cyclictest15582-21apt-key08:12:381
2470899874,53cyclictest17755-21awk12:13:070
24708998661,17cyclictest1-21systemd10:24:110
24708998549,12cyclictest181rcu_preempt08:54:010
2472899843,52cyclictest12582-21ssh09:23:112
24720998441,32cyclictest19130-21modprobe11:22:341
24728998361,14cyclictest2374-21systemd-journal10:04:112
24728998355,19cyclictest17536-21unixbench_singl11:18:112
24708998343,12cyclictest0-21swapper/011:18:000
24728998242,19cyclictest25016-21kworker/u17:2-writeback08:42:562
24708998158,15cyclictest297-21systemd-logind08:12:360
24708998158,15cyclictest297-21systemd-logind08:12:360
24728998056,18cyclictest30975-21cstates10:47:522
24728998054,17cyclictest16400-21ssh10:23:092
2470899807,52cyclictest15-21ksoftirqd/010:27:480
24708998046,13cyclictest181rcu_preempt12:05:350
24728997957,15cyclictest5403-21latency_hist09:12:372
24720997960,13cyclictest3700-21unixbench_multi07:33:121
24708997933,7cyclictest181rcu_preempt11:58:180
24708997933,17cyclictest181rcu_preempt11:26:110
24708997855,16cyclictest2698-21latency_hist07:32:380
24708997818,29cyclictest161ktimers/011:52:500
24708997818,29cyclictest161ktimers/011:52:500
2472899774,39cyclictest7404-21/usr/sbin/munin11:02:582
24720997755,16cyclictest24697-21cyclictest11:59:221
24720997747,21cyclictest1535-21cstates10:52:511
24720997747,21cyclictest1535-21cstates10:52:511
24708997759,12cyclictest2374-21systemd-journal09:57:360
24708997757,14cyclictest23020-21ntp_kernel_pll_11:28:030
24708997757,14cyclictest23020-21ntp_kernel_pll_11:28:030
24708997746,16cyclictest181rcu_preempt07:06:000
24708997738,9cyclictest0-21swapper/007:17:580
24708997725,11cyclictest0-21swapper/008:32:550
2470899772,38cyclictest352-21runrttasks09:52:070
24720997651,18cyclictest31755-21idleruntime-cro07:22:361
24708997650,7cyclictest181rcu_preempt07:37:490
2472899753,49cyclictest29442-21latency_hist09:52:382
24720997561,10cyclictest24697-21cyclictest09:30:061
24720997561,10cyclictest24697-21cyclictest09:30:061
2470899753,55cyclictest14765-21mailstats12:08:100
24708997524,26cyclictest0-21swapper/010:43:060
24708997524,26cyclictest0-21swapper/010:43:060
24720997453,15cyclictest544-21cron11:12:351
24720997450,18cyclictest29593-21apt-key09:52:381
2472099743,33cyclictest31-21ksoftirqd/110:03:191
24720997423,37cyclictest22868-21sed11:28:001
24720997423,37cyclictest22868-21sed11:28:001
2470899746,37cyclictest15-21ksoftirqd/012:27:470
24708997449,20cyclictest31469-21kworker/u17:1+xprtiod12:22:380
24708997449,20cyclictest31469-21kworker/u17:1+xprtiod12:22:380
24708997439,8cyclictest181rcu_preempt10:03:000
24708997425,33cyclictest0-21swapper/010:07:480
2472899736,30cyclictest26567-21kworker/2:1+mm_percpu_wq09:03:052
24728997352,12cyclictest31469-21kworker/u17:1-rpciod11:50:432
24728997351,8cyclictest181rcu_preempt12:19:122
24728997351,8cyclictest181rcu_preempt12:19:122
24728997346,20cyclictest23759-21sh08:37:352
24728997344,10cyclictest26371-21latency_hist07:07:382
24720997349,15cyclictest21263-21diskmemload09:38:021
2472099732,35cyclictest31-21ksoftirqd/109:21:471
2472099732,35cyclictest31-21ksoftirqd/109:21:471
24708997353,13cyclictest15297-21ssh10:22:350
24708997343,12cyclictest181rcu_preempt09:45:200
24708997343,12cyclictest181rcu_preempt09:45:200
24708997341,11cyclictest0-21swapper/011:32:540
24728997250,15cyclictest2374-21systemd-journal11:23:562
24728997244,14cyclictest0-21swapper/209:13:112
24728997243,20cyclictest12901-21fschecks_time10:17:582
2472099728,55cyclictest27164-21apt-get07:08:051
24720997256,9cyclictest0-21swapper/111:02:341
24720997253,13cyclictest352-21runrttasks10:37:391
24720997248,8cyclictest181rcu_preempt09:43:241
24720997248,8cyclictest181rcu_preempt09:43:241
2472099724,39cyclictest31-21ksoftirqd/112:31:511
24720997242,21cyclictest32141-21processes11:43:071
24720997242,21cyclictest32141-21processes11:43:071
24720997228,9cyclictest0-21swapper/108:22:581
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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