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2025-09-18 - 10:18
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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 rack9slot2.osadl.org (updated Thu Sep 18, 2025 00:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
248912305270,22sleep30-21swapper/33
247902271185,51sleep20-21swapper/22
240352271208,47sleep10-21swapper/11
246702253182,24sleep00-21swapper/00
2508399178173,3cyclictest0-21swapper/11
2509099162158,2cyclictest0-21swapper/33
2507999153147,3cyclictest32756-21strings0
1740421340,4sleep12508399cyclictest1
2508799123117,4cyclictest0-21swapper/22
268822610,8sleep335-21ksoftirqd/33
231362560,4sleep023138-21latency_hist0
25090993021,5cyclictest5731-21perf3
2508799251,21cyclictest16116-21munin-run2
25079992513,9cyclictest29549-21cut0
25090992411,3cyclictest35-21ksoftirqd/33
25083992415,5cyclictest505-21dbus-daemon1
25083992415,5cyclictest505-21dbus-daemon1
294622230,3sleep228-21ksoftirqd/22
2508799234,17cyclictest18472-21awk2
2508799233,17cyclictest4293-21latency_hist2
2508799233,17cyclictest27209-21cat2
2508799231,4cyclictest5728-21apt-get2
25083992316,4cyclictest11392-21seq1
25083992315,5cyclictest28023-21sh1
21762230,3sleep30-21swapper/33
7082220,1sleep20-21swapper/22
7082220,1sleep20-21swapper/22
2509099221,17cyclictest2082-21systemd-journal3
25090992210,6cyclictest665-21runrttasks3
2508799226,14cyclictest30668-21perf2
2508799223,17cyclictest7665-21latency_hist2
2508799223,17cyclictest0-21swapper/22
25087992215,4cyclictest27920-21ls2
2508799221,19cyclictest14246-21cut2
2508799221,18cyclictest18578-21munin-run2
2508799221,18cyclictest12736-21cron2
25083992215,4cyclictest3308-21idleruntime-cro1
25083992215,4cyclictest29966-21sh1
25083992214,5cyclictest24384-21sort1
25083992214,5cyclictest21832-21grep1
25083992214,4cyclictest5346-21grep1
25090992115,3cyclictest10408-21sh3
25090992114,4cyclictest28657-21idleruntime-cro3
2508799213,16cyclictest12696-21cat2
25087992116,3cyclictest32091-21munin-run2
25087992116,3cyclictest20469-21munin-run2
25087992115,4cyclictest27930-21seq2
25087992115,4cyclictest18695-21cat2
25087992115,4cyclictest16508-21load2
2508799211,3cyclictest8498-21ntp_states2
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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