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2025-11-27 - 17:25
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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 Thu Nov 27, 2025 12:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
63762301264,25sleep10-21swapper/11
683999284277,5cyclictest6557-21awk1
66912246177,39sleep20-21swapper/22
65512245176,24sleep30-21swapper/33
64102238173,52sleep00-21swapper/00
683699165157,4cyclictest6550-21perf0
684699164158,4cyclictest6532-21munin-run2
1370921430,2sleep2684699cyclictest2
685099114109,3cyclictest0-21swapper/33
258442460,1sleep10-21swapper/11
120152430,1sleep00-21swapper/00
684699282,6cyclictest15787-21apt-get2
66622280,1sleep20-21swapper/22
685099273,6cyclictest0-21swapper/33
684699272,22cyclictest0-21swapper/22
685099262,14cyclictest5575-21timerandwakeup3
685099253,9cyclictest2364-21aten2_r9power_e3
6846992514,10cyclictest0-21swapper/22
684699251,20cyclictest22025-21munin-run2
685099243,7cyclictest23863-21ntp_states3
685099242,9cyclictest23772-21aten2_r9power_c3
685099242,9cyclictest23772-21aten2_r9power_c3
685099242,8cyclictest26765-21diskstats3
685099241,9cyclictest8482-21cat3
684699245,3cyclictest0-21swapper/22
684699243,7cyclictest31656-21apt-get2
684699242,16cyclictest27037-21apt-get2
684699241,19cyclictest20678-21munin-run2
685099234,5cyclictest32093-21taskset3
685099233,6cyclictest1487-21taskset3
685099232,18cyclictest28353-21grep3
685099231,9cyclictest28559-21missed_timers3
685099231,9cyclictest16955-21aten2.4-expect3
684699233,17cyclictest7735-21sed2
684699233,17cyclictest4601-21sendmail-mta2
684699233,17cyclictest4091-21latency_hist2
684699232,4cyclictest3104-21apt-get2
684699232,19cyclictest0-21swapper/22
6846992317,3cyclictest10915-21sh2
6846992316,4cyclictest24053-21munin-run2
684699231,4cyclictest30855-21munin-run2
684699231,19cyclictest505-21dbus-daemon2
684699231,19cyclictest17672-21apt-get2
684699231,18cyclictest25187-21sendmail-mta2
6846992310,3cyclictest22137-21timerandwakeup2
6839992318,3cyclictest21-21ksoftirqd/11
6839992318,3cyclictest21-21ksoftirqd/11
6836992315,5cyclictest13760-21idleruntime-cro0
685099223,6cyclictest11318-21taskset3
685099222,7cyclictest22393-21taskset3
685099222,6cyclictest35-21ksoftirqd/33
685099222,6cyclictest15363-21taskset3
685099222,5cyclictest0-21swapper/33
6850992215,5cyclictest32056-21if_enp2s03
684699225,3cyclictest29645-21latency_hist2
6846992215,5cyclictest8316-21diskstats2
6846992214,5cyclictest4375-21apt-get2
684699221,18cyclictest27556-21cron2
684699221,18cyclictest11491-21sendmail-msp2
6839992217,3cyclictest21-21ksoftirqd/11
685099212,6cyclictest14454-21runrttasks3
685099211,6cyclictest7948-21rs:main3
685099211,6cyclictest19522-21taskset3
6850992115,4cyclictest14177-21ntp_states3
6850992114,5cyclictest7431-21cpuspeed_turbos3
6850992114,5cyclictest6204-21expr3
6850992114,5cyclictest13601-21expr3
6850992110,7cyclictest32194-21apt-get3
684699212,17cyclictest28109-21latency_hist2
6846992116,3cyclictest5141-21/usr/sbin/munin2
6846992114,4cyclictest18221-21grep2
684699211,18cyclictest13024-21munin-run2
6839992117,2cyclictest14602-21turbostat.cron1
6839992116,3cyclictest2696-21acpi1
6839992116,3cyclictest21-21ksoftirqd/11
6839992115,4cyclictest29258-21ntpq1
6839992115,4cyclictest18576-21pluginstate1
6839992114,4cyclictest1119-21diskstats1
683999211,17cyclictest8581-21apt-get1
6836992118,2cyclictest0-21swapper/00
6836992116,3cyclictest11709-21/usr/sbin/munin0
6836992115,4cyclictest6516-21cut0
6836992115,4cyclictest26849-21cups-browsed0
6836992114,4cyclictest24066-21turbostat.cron0
685099202,6cyclictest35-21ksoftirqd/33
685099202,6cyclictest24012-21runrttasks3
685099201,7cyclictest10626-21taskset3
685099201,6cyclictest35-21ksoftirqd/33
6850992014,4cyclictest6778-21expr3
6850992014,4cyclictest17147-21cat3
6850992014,4cyclictest12012-21ntp_kernel_pll_3
6850992014,4cyclictest11701-21fw_packets3
6850992013,4cyclictest26112-21cat3
684699207,10cyclictest6892-21aten2_r9power_p2
684699202,6cyclictest11727-21apt-get2
6846992017,2cyclictest0-21swapper/22
6846992016,2cyclictest1492-21df2
6846992015,3cyclictest11596-21diskstats2
6846992014,4cyclictest32002-21open_inodes2
6846992014,4cyclictest32002-21open_inodes2
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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