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2026-05-04 - 18:24
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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 Mon May 04, 2026 12:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1975399289280,4cyclictest24460-21awk1
1974899287280,4cyclictest24411-21munin-run0
195642286207,45sleep20-21swapper/22
194622256184,25sleep10-21swapper/11
192942251177,61sleep30-21swapper/33
194562247211,24sleep00-21swapper/00
1975699213206,4cyclictest24459-21sendmail-msp2
2058021360,2sleep11975399cyclictest1
877321250,1sleep00-21swapper/00
197619910299,2cyclictest0-21swapper/33
268742660,5sleep11975399cyclictest1
204862610,1sleep00-21swapper/00
202862450,6sleep121-21ksoftirqd/11
19748992822,4cyclictest1398-21dump-pmu-power0
1975699262,4cyclictest20612-21apt-get2
19756992615,9cyclictest2655-21sendmail_mailst2
131192260,3sleep20-21swapper/22
1975699234,17cyclictest21857-21cat2
1975699232,18cyclictest419-21procmail2
19756992318,3cyclictest24147-21ls2
19753992318,3cyclictest30174-21grep1
1975699227,3cyclictest28617-21latency_hist2
1975699221,4cyclictest1022-21munin-run2
1975699221,3cyclictest29330-21munin-run2
19756992211,9cyclictest11062-21latency_hist2
19753992212,6cyclictest11688-21sendmail1
37002210,17sleep13822-21aten2_r9power_v1
19761992114,4cyclictest31594-21cut3
1976199211,19cyclictest0-21swapper/33
1976199210,19cyclictest0-21swapper/33
19756992118,2cyclictest0-21swapper/22
19756992115,4cyclictest7752-21cat2
1975699211,3cyclictest26210-21munin-run2
1975699211,3cyclictest18959-21munin-run2
1975699211,17cyclictest27877-21hostname2
1975699210,4cyclictest28548-1kworker/2:1H2
1975699210,18cyclictest18219-21munin-node2
19753992116,3cyclictest6197-21expr1
19753992116,3cyclictest24627-21sed1
19753992115,4cyclictest29771-21ntpq1
19753992115,4cyclictest29415-21sed1
19753992115,4cyclictest22989-21awk1
19753992115,3cyclictest5322-21if_enp2s01
19753992114,5cyclictest17437-21grep1
19753992113,5cyclictest13316-21grep1
1974899217,11cyclictest14224-21cpu0
1974899213,16cyclictest6555-21grep0
1974899211,6cyclictest21788-21cups-browsed0
19748992115,4cyclictest3401-21sh0
19748992115,4cyclictest30089-21sed0
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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