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2025-12-08 - 16:58
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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 12:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1327923110,26sleep30-21swapper/33
145232299263,24sleep00-21swapper/00
143762294211,68sleep20-21swapper/22
1483999291284,4cyclictest28763-21sendmail-mta0
1484599269260,4cyclictest505-21dbus-daemon1
145242266185,26sleep10-21swapper/11
1485499226221,3cyclictest28730-21munin-run3
2050721770,3sleep31485499cyclictest3
14850999590,3cyclictest0-21swapper/22
91382560,2sleep00-21swapper/00
91382560,2sleep00-21swapper/00
236272550,1sleep30-21swapper/33
45082460,2sleep30-21swapper/33
249402380,1sleep00-21swapper/00
38852370,2sleep00-21swapper/00
156072360,3sleep335-21ksoftirqd/33
14839992815,8cyclictest505-21dbus-daemon0
134672280,2sleep20-21swapper/22
1485499270,26cyclictest0-21swapper/33
1485099261,5cyclictest29663-21munin-run2
11682240,3sleep30-21swapper/33
234312230,4sleep21485099cyclictest2
1485099232,4cyclictest19416-21sendmail2
1485099231,4cyclictest505-21dbus-daemon2
1485099231,19cyclictest25063-21idleruntime-cro2
1485099231,18cyclictest8078-21munin-run2
14845992315,5cyclictest12054-21cron1
70372220,2sleep0101rcuc/00
264982220,2sleep00-21swapper/00
14854992215,4cyclictest19203-21missed_timers3
14854992215,4cyclictest15219-21ntp_offset3
1485099224,17cyclictest0-21swapper/22
1485099221,3cyclictest2057-1kworker/2:1H2
14850992210,10cyclictest20535-21sendmail-mta2
14839992216,3cyclictest17690-21grep0
14839992215,4cyclictest29290-21uptime0
14839992214,5cyclictest30064-21aten2.4-expect0
108132220,2sleep20-21swapper/22
14854992116,3cyclictest334-21dump-pmu-power3
14854992116,3cyclictest14827-21irqstats3
14854992116,3cyclictest12152-21sendmail3
14854992115,4cyclictest19319-21needreboot3
14854992114,4cyclictest5466-21cat3
1485099214,15cyclictest15965-21cron2
1485099213,16cyclictest30359-21latency_hist2
1485099213,16cyclictest23033-21latency_hist2
1485099213,16cyclictest13894-21latency_hist2
1485099212,17cyclictest16238-21cat2
14850992116,3cyclictest26291-21latency2
14850992116,3cyclictest11013-21irqstats2
14850992115,3cyclictest8372-21cpu2
14850992114,5cyclictest27422-21ntpq2
14850992114,4cyclictest0-21swapper/22
1485099211,3cyclictest3605-21sh2
1485099211,3cyclictest317-21munin-run2
1485099211,3cyclictest2630-21apt-get2
1485099211,3cyclictest1571-21munin-run2
1485099211,17cyclictest21015-21load2
1485099210,3cyclictest30760-21munin-run2
1485099210,18cyclictest19659-21/usr/sbin/munin2
14845992116,3cyclictest2630-21needreboot1
14845992115,4cyclictest21327-21seq1
14845992115,4cyclictest19779-21if_enp2s01
14845992114,5cyclictest13309-21awk1
14845992114,4cyclictest4420-21grep1
14845992114,4cyclictest26679-21cron1
14839992114,5cyclictest20341-21sed0
14839992113,5cyclictest16774-21sh0
14839992113,4cyclictest21454-21idleruntime-cro0
14854992015,3cyclictest9383-21threads3
14854992015,3cyclictest6959-21cut3
14854992015,3cyclictest30169-21timerandwakeup3
14854992015,3cyclictest26677-21cron3
14854992015,3cyclictest23470-21dump-pmu-power3
14854992015,3cyclictest23393-21aten2_r9power_v3
14854992015,3cyclictest2270-21fw_packets3
14854992014,4cyclictest3252-21grep3
14854992014,4cyclictest27454-21pluginstate3
14854992014,4cyclictest12457-21sh3
14854992013,4cyclictest22084-21sendmail3
14854992012,5cyclictest32434-21df3
1485099206,12cyclictest7948-21rs:main2
1485099202,16cyclictest0-21swapper/22
14850992015,3cyclictest22344-21sed2
14850992014,3cyclictest4780-21if_err_enp2s02
1485099201,3cyclictest12835-21munin-run2
14850992012,5cyclictest32329-21tr2
1485099201,18cyclictest24686-21awk2
1485099201,17cyclictest8471-21latency_hist2
1485099201,16cyclictest23441-1kworker/2:1H2
1485099200,4cyclictest25483-21cron2
1485099200,4cyclictest25483-21cron2
1485099200,3cyclictest29398-1kworker/2:0H2
1485099200,17cyclictest36392sleep22
1484599207,2cyclictest111rcu_preempt1
14845992015,3cyclictest8053-21/usr/sbin/munin1
14845992015,3cyclictest8053-21/usr/sbin/munin1
14845992015,3cyclictest25484-21apt-key1
14845992015,3cyclictest23417-21seq1
14845992015,3cyclictest19399-21seq1
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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