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2025-12-24 - 18:08
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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 Wed Dec 24, 2025 12:43:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
15382341231,77sleep30-21swapper/33
17702322184,118sleep20-21swapper/22
14912280244,24sleep10-21swapper/11
195799252247,3cyclictest14879-21munin-run2
14632246210,24sleep00-21swapper/00
195399227219,5cyclictest14891-21apt-get1
194899202184,2cyclictest111rcu_preempt0
395421500,4sleep33886-21apt-key3
196199130124,4cyclictest12867-1kworker/3:2H3
268802550,2sleep30-21swapper/33
111632490,2sleep30-21swapper/33
111632490,2sleep30-21swapper/33
48592460,1sleep00-21swapper/00
37972460,2sleep00-21swapper/00
196199287,19cyclictest0-21swapper/33
196199287,18cyclictest0-21swapper/33
178282280,1sleep30-21swapper/33
196199277,3cyclictest0-21swapper/33
248552260,5sleep024807-21munin-run0
202792260,1sleep10-21swapper/11
196199266,17cyclictest0-21swapper/33
196199265,18cyclictest0-21swapper/33
196199265,18cyclictest0-21swapper/33
196199262,14cyclictest3891-21sed3
1961992621,3cyclictest6441-21munin-run3
196199262,10cyclictest21002-21cut3
196199253,19cyclictest13567-21sendmail-mta3
196199245,3cyclictest0-21swapper/33
196199245,3cyclictest0-21swapper/33
196199244,17cyclictest2480-21sendmail-mta3
196199244,17cyclictest1302-21sendmail-mta3
196199242,7cyclictest35-21ksoftirqd/33
196199242,7cyclictest35-21ksoftirqd/33
196199242,7cyclictest35-21ksoftirqd/33
196199242,19cyclictest21905-21munin-run3
196199241,20cyclictest31853-21cat3
196199238,12cyclictest0-21swapper/33
196199234,17cyclictest10663-21sendmail-mta3
196199233,17cyclictest8481-21sendmail-mta3
196199233,17cyclictest23804-21sendmail-mta3
196199233,17cyclictest23804-21sendmail-mta3
196199233,17cyclictest0-21swapper/33
196199232,6cyclictest35-21ksoftirqd/33
196199232,6cyclictest35-21ksoftirqd/33
196199232,6cyclictest35-21ksoftirqd/33
196199232,6cyclictest35-21ksoftirqd/33
196199232,18cyclictest0-21swapper/33
196199231,7cyclictest35-21ksoftirqd/33
196199231,7cyclictest35-21ksoftirqd/33
196199231,6cyclictest35-21ksoftirqd/33
196199230,14cyclictest18383-21aten2_r9power_c3
196199224,16cyclictest9877-21cat3
196199222,7cyclictest35-21ksoftirqd/33
196199222,7cyclictest35-21ksoftirqd/33
196199222,7cyclictest35-21ksoftirqd/33
196199222,7cyclictest35-21ksoftirqd/33
196199222,6cyclictest35-21ksoftirqd/33
196199222,6cyclictest35-21ksoftirqd/33
196199221,8cyclictest11680-21awk3
196199221,7cyclictest35-21ksoftirqd/33
196199221,6cyclictest35-21ksoftirqd/33
196199221,6cyclictest35-21ksoftirqd/33
196199221,5cyclictest0-21swapper/33
196199221,4cyclictest31781-1kworker/3:1H3
196199221,3cyclictest340-21systemd-journal3
196199220,8cyclictest35-21ksoftirqd/33
196199220,8cyclictest35-21ksoftirqd/33
196199220,8cyclictest35-21ksoftirqd/33
196199220,8cyclictest35-21ksoftirqd/33
196199220,6cyclictest0-21swapper/33
1957992219,2cyclictest0-21swapper/22
1953992216,3cyclictest15192-21sendmail1
1953992214,5cyclictest18699-21sh1
1953992214,4cyclictest4080-21latency_hist1
196199212,7cyclictest35-21ksoftirqd/33
196199212,6cyclictest35-21ksoftirqd/33
196199212,5cyclictest0-21swapper/33
196199211,7cyclictest35-21ksoftirqd/33
196199211,6cyclictest35-21ksoftirqd/33
196199211,6cyclictest10441-21taskset3
196199210,8cyclictest35-21ksoftirqd/33
196199210,8cyclictest35-21ksoftirqd/33
195799214,15cyclictest10551-21turbostat2
1957992118,2cyclictest0-21swapper/22
1957992115,4cyclictest8677-21sed2
1957992115,4cyclictest12788-21ntpq2
1953992114,4cyclictest17702-21grep1
1948992115,4cyclictest7119-21df_inode0
1948992115,4cyclictest31832-21idleruntime-cro0
80512200,2sleep0194899cyclictest0
196199203,6cyclictest35-21ksoftirqd/33
196199202,6cyclictest35-21ksoftirqd/33
1957992015,3cyclictest5293-21pluginstate2
1957992015,3cyclictest25073-21ntpq2
1957992015,3cyclictest16239-21sed2
1957992015,3cyclictest10222-21processes2
1957992014,4cyclictest2141-21df2
1957992014,4cyclictest14234-21gdbus2
195399201,8cyclictest22044-21sendmail-mta1
1953992016,2cyclictest2598-21/usr/sbin/munin1
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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