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2025-12-08 - 09:43
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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 rack9slot2.osadl.org (updated Mon Dec 08, 2025 00:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
164262260223,25sleep10-21swapper/11
150222255220,23sleep20-21swapper/22
164502251182,25sleep00-21swapper/00
163782250182,48sleep30-21swapper/33
1689899221217,2cyclictest11250irq/128-xhci_hc2
1689099202198,2cyclictest0-21swapper/11
1690399158154,2cyclictest0-21swapper/33
1688599132127,3cyclictest26989-21strings0
43942590,1sleep00-21swapper/00
108882480,1sleep30-21swapper/33
175962450,1sleep30-21swapper/33
42862430,2sleep30-21swapper/33
249052420,2sleep00-21swapper/00
16890993210,4cyclictest21-21ksoftirqd/11
1689899284,9cyclictest8850-21unixbench_multi2
1689899284,9cyclictest695-21sed2
1689899272,5cyclictest0-21swapper/22
1689899272,10cyclictest16492-21grep2
1689899271,23cyclictest20236-21cron2
1689899262,6cyclictest0-21swapper/22
16898992512,10cyclictest843-21mailstats2
16898992512,10cyclictest843-21mailstats2
168012250,1sleep30-21swapper/33
1689899243,6cyclictest1022-21sed2
1689899242,7cyclictest0-21swapper/22
16890992415,2cyclictest21-21ksoftirqd/11
16890992414,3cyclictest21-21ksoftirqd/11
1689899233,6cyclictest20511-21gltestperf2
16898992310,10cyclictest31667-21date2
1689899223,5cyclictest7291-21munin-run2
1689899223,17cyclictest548-21latency_hist2
1689899222,6cyclictest3022-21seq2
1689899222,6cyclictest28-21ksoftirqd/22
1689899222,6cyclictest0-21swapper/22
1689899222,5cyclictest0-21swapper/22
16898992215,4cyclictest5247-21sh2
16898992215,4cyclictest5247-21sh2
16898992214,5cyclictest9739-21munin-run2
1689899221,3cyclictest3114-1kworker/2:2H2
1689899221,2cyclictest0-21swapper/22
1689899221,2cyclictest0-21swapper/22
16890992218,2cyclictest21-21ksoftirqd/11
16890992217,3cyclictest21-21ksoftirqd/11
16890992213,3cyclictest21-21ksoftirqd/11
16885992215,4cyclictest23527-21processes0
16885992210,3cyclictest101002cpuspeed0
103032220,2sleep20-21swapper/22
16903992116,3cyclictest25939-21sed3
16903992115,3cyclictest2875-21rt-features3
16903992115,3cyclictest2875-21rt-features3
16903992115,3cyclictest1037-21timerwakeupswit3
16903992115,3cyclictest1037-21timerwakeupswit3
16903992113,5cyclictest505-21dbus-daemon3
1689899214,9cyclictest28-21ksoftirqd/22
1689899214,9cyclictest28-21ksoftirqd/22
1689899213,16cyclictest29560-21latency_hist2
16898992118,2cyclictest271rcuc/22
16898992116,3cyclictest20518-21perf2
16898992115,4cyclictest17787-21missed_timers2
16898992115,3cyclictest24318-21idleruntime-cro2
1689899210,5cyclictest28-21ksoftirqd/22
1689899210,19cyclictest9019-21perf2
1689899210,18cyclictest27689-21latency_hist2
1689099219,3cyclictest111rcu_preempt1
1689099219,3cyclictest111rcu_preempt1
1689099215,4cyclictest21-21ksoftirqd/11
16890992116,3cyclictest21-21ksoftirqd/11
16890992116,3cyclictest201rcuc/11
16890992115,4cyclictest7834-21sed1
16890992115,4cyclictest19911-21sed1
16890992115,3cyclictest8776-21needreboot1
16890992115,3cyclictest24816-21acpi1
16890992114,5cyclictest25826-21/usr/sbin/munin1
16890992114,4cyclictest18506-21basename1
16890992110,3cyclictest21-21ksoftirqd/11
16885992116,3cyclictest24486-21latency0
16885992115,4cyclictest32689-21diskstats0
16885992114,4cyclictest6796-21sh0
16903992016,2cyclictest9876-21acpi3
16903992015,3cyclictest6018-21cpu3
16903992015,3cyclictest5919-21missed_timers3
16903992015,3cyclictest5646-21aten2.4-expect3
16903992015,3cyclictest4266-21ls3
16903992015,3cyclictest28632-21sh3
16903992015,3cyclictest23955-21timerandwakeup3
16903992015,3cyclictest20806-21threads3
16903992015,3cyclictest20806-21threads3
16903992015,3cyclictest14006-21users3
16903992015,3cyclictest13262-21seq3
16903992014,4cyclictest851-21seq3
16903992014,4cyclictest6516-21if_err_enp2s03
16903992014,4cyclictest23824-21hostname3
16903992014,4cyclictest17513-21awk3
16903992014,4cyclictest17513-21awk3
16903992014,4cyclictest1604-21idleruntime-cro3
16903992014,3cyclictest10533-21unixbench-2d3
16903992013,4cyclictest505-21dbus-daemon3
16903992013,4cyclictest21556-21date3
16903992013,4cyclictest19139-21cat3
1689899204,8cyclictest28-21ksoftirqd/22
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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