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2026-04-23 - 22:17
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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 50 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
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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