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2025-12-15 - 02:08
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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 Sun Dec 14, 2025 12:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
136142318178,25sleep30-21swapper/33
132642282213,51sleep10-21swapper/11
136962266179,69sleep00-21swapper/00
1404899256252,2cyclictest0-21swapper/00
1406299251244,4cyclictest18190-21strings3
136782248183,52sleep20-21swapper/22
2367721650,3sleep21405899cyclictest2
1401021540,4sleep01404899cyclictest0
1405399147143,2cyclictest0-21swapper/11
2386321300,3sleep01404899cyclictest0
261521240,2sleep20-21swapper/22
261521240,2sleep20-21swapper/22
14058999591,2cyclictest0-21swapper/22
88232550,4sleep11405399cyclictest1
145762420,1sleep10-21swapper/11
294472390,9sleep09-21ksoftirqd/00
149462250,2sleep00-21swapper/00
1406299253,20cyclictest20502-21sendmail-mta3
139692250,1sleep00-21swapper/00
14058992412,6cyclictest223442chrt2
14048992419,3cyclictest16159-21tr0
1406299234,17cyclictest8801-21sendmail-mta3
1406299234,17cyclictest5342-21sendmail-mta3
1406299234,17cyclictest25985-21sendmail-mta3
1406299234,17cyclictest17375-21sendmail-mta3
1406299234,17cyclictest13478-21sendmail-mta3
1406299234,17cyclictest1210-21sendmail-mta3
1406299231,4cyclictest19574-21grep3
1405899239,4cyclictest5559-21tr2
14058992316,4cyclictest12318-21idleruntime-cro2
233612220,1sleep00-21swapper/00
1406299224,3cyclictest0-21swapper/33
1406299224,16cyclictest6070-21sendmail-mta3
1406299223,17cyclictest30061-21sendmail-mta3
1406299223,17cyclictest29156-21sendmail-mta3
1406299223,17cyclictest1998-21sendmail-mta3
1406299221,3cyclictest22804-1kworker/3:2H3
1405399222,18cyclictest16243-21head1
136622220,1sleep213666-21cut2
1406299213,16cyclictest21029-21sendmail-mta3
1406299213,16cyclictest15824-21sendmail-mta3
1406299213,16cyclictest10124-21sendmail-mta3
1406299212,3cyclictest0-21swapper/33
1406299212,17cyclictest21447-21sendmail-mta3
1406299212,17cyclictest21447-21sendmail-mta3
1406299212,17cyclictest18274-21sendmail-mta3
1406299212,17cyclictest15500-21latency_hist3
1406299212,17cyclictest13310-21sendmail-mta3
14062992116,3cyclictest8822-21/usr/sbin/munin3
1406299211,3cyclictest22804-1kworker/3:2H3
1406299211,18cyclictest25236-21munin-run3
1406299211,17cyclictest6923-21munin-run3
1406299210,8cyclictest136662cut3
14058992117,3cyclictest28-21ksoftirqd/22
14058992115,4cyclictest2337-21wc2
14058992114,4cyclictest31757-21dump-pmu-power2
14058992114,4cyclictest14841-21grep2
14053992115,4cyclictest517-21dbus-daemon1
14053992115,4cyclictest14616-21df_inode1
1404899212,17cyclictest3496-21sendmail-msp0
14048992115,4cyclictest25717-21fw_packets0
14048992114,5cyclictest32587-21cat0
47542200,1sleep10-21swapper/11
1406299207,11cyclictest0-21swapper/33
1406299207,11cyclictest0-21swapper/33
1406299202,2cyclictest0-21swapper/33
14062992016,2cyclictest24675-21taskset3
1406299201,5cyclictest11628-21sendmail-msp3
14062992014,4cyclictest3577-21cut3
14062992014,4cyclictest27376-21cut3
14062992014,4cyclictest12144-21uname3
1406299201,3cyclictest517-21dbus-daemon3
14058992015,3cyclictest6589-21nfs4_client2
14058992015,3cyclictest32215-21memory2
14058992015,3cyclictest27273-21sh2
14058992013,4cyclictest11889-21aten2.4-expect2
1405899201,17cyclictest8801-21sendmail-mta2
14053992017,2cyclictest0-21swapper/11
14053992015,3cyclictest634-21snmpd1
14053992015,3cyclictest26637-21ls1
14053992015,3cyclictest21420-21/usr/sbin/munin1
14053992014,4cyclictest4908-21sh1
14053992014,4cyclictest20776-21grep1
14053992014,4cyclictest20776-21grep1
14053992014,3cyclictest21466-21cat1
14053992013,4cyclictest19560-21sendmail1
1404899206,11cyclictest14397-21switchtime0
14048992017,2cyclictest0-21swapper/00
14048992015,3cyclictest634-21snmpd0
14048992015,3cyclictest30410-21diskstats0
14048992015,3cyclictest25476-21/usr/sbin/munin0
14062991915,2cyclictest9619-21acpi3
14062991915,2cyclictest29715-21cat3
14062991914,3cyclictest5845-21if_enp3s03
14062991914,3cyclictest4160-21pluginstate3
14062991914,3cyclictest30723-21memory3
14062991914,3cyclictest18241-21vmstat3
14062991914,3cyclictest11068-21idleruntime3
14062991913,4cyclictest32260-21latency3
14062991912,4cyclictest3046-21cut3
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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