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2025-12-17 - 23:58
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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 Wed Dec 17, 2025 12:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
19372317280,25sleep20-21swapper/22
19002317280,25sleep00-21swapper/00
20332294259,24sleep10-21swapper/11
224999276269,5cyclictest18941-21strings0
19602259169,55sleep30-21swapper/33
226699179176,2cyclictest0-21swapper/33
225799128124,2cyclictest0-21swapper/11
226299105101,2cyclictest0-21swapper/22
59142450,3sleep30-21swapper/33
220342430,3sleep00-21swapper/00
310852400,1sleep10-21swapper/11
184092340,1sleep30-21swapper/33
226699298,18cyclictest0-21swapper/33
134852290,10sleep121-21ksoftirqd/11
226699276,4cyclictest0-21swapper/33
2266992710,14cyclictest35-21ksoftirqd/33
243222260,2sleep20-21swapper/22
226699267,17cyclictest35-21ksoftirqd/33
2262992614,3cyclictest26102-21sed2
286592250,2sleep30-21swapper/33
226699257,3cyclictest35-21ksoftirqd/33
226699253,19cyclictest515-21avahi-daemon3
226699253,17cyclictest18491-21sendmail-mta3
226299253,13cyclictest28843-21tr2
2262992512,3cyclictest7641-21grep2
2257992520,3cyclictest7849-21munin-plugin-st1
226699244,17cyclictest10041-21sendmail-mta3
2266992416,5cyclictest7078-21ls3
226699241,20cyclictest517-21dbus-daemon3
2266992410,12cyclictest35-21ksoftirqd/33
49192230,3sleep00-21swapper/00
226699235,2cyclictest0-21swapper/33
226699234,4cyclictest35-21ksoftirqd/33
226699234,3cyclictest0-21swapper/33
226699234,17cyclictest6435-21sendmail-mta3
226699233,17cyclictest13184-21latency_hist3
226699232,3cyclictest0-21swapper/33
2257992312,7cyclictest25972-21apt-get1
74322220,2sleep30-21swapper/33
226699224,16cyclictest30690-21sendmail-mta3
226699224,16cyclictest14100-21sendmail-mta3
226699223,17cyclictest3226-21cat3
226699223,17cyclictest26626-21sendmail-mta3
226699223,17cyclictest21353-21awk3
226699223,17cyclictest11230-21cat3
226699222,3cyclictest0-21swapper/33
226699222,3cyclictest0-21swapper/33
226699222,17cyclictest14886-21sendmail-mta3
226699221,19cyclictest15492-21basename3
2257992214,5cyclictest31580-21apt-get1
2249992211,9cyclictest30946-21if_err_enp3s00
226699219,10cyclictest6839-1kworker/3:2H3
226699218,4cyclictest35-21ksoftirqd/33
226699218,11cyclictest23959-21sendmail3
226699213,16cyclictest3631-21sendmail-mta3
226699213,16cyclictest3631-21sendmail-mta3
226699212,2cyclictest0-21swapper/33
226699212,17cyclictest28789-21cat3
226699212,17cyclictest23026-21sendmail-mta3
2266992116,3cyclictest35-21ksoftirqd/33
2266992116,3cyclictest16274-21cron3
2266992115,4cyclictest9162-21sendmail-mta3
226699211,4cyclictest936-21sendmail3
2266992112,3cyclictest111rcu_preempt3
2266992112,3cyclictest111rcu_preempt3
226699211,17cyclictest6839-1kworker/3:2H3
226699211,17cyclictest29324-21cat3
2262992116,3cyclictest2859-21ntpq2
2262992116,3cyclictest2859-21ntpq2
2262992113,5cyclictest15402-21seq2
2257992114,4cyclictest517-21dbus-daemon1
2257992114,4cyclictest29314-21idleruntime-cro1
2249992115,4cyclictest4774-21seq0
2249992110,9cyclictest9-21ksoftirqd/00
257752200,2sleep00-21swapper/00
226699207,4cyclictest35-21ksoftirqd/33
226699204,15cyclictest24741-21sendmail3
226699202,16cyclictest7055-21cat3
2266992016,2cyclictest0-21swapper/33
2266992015,3cyclictest35-21ksoftirqd/33
226699201,3cyclictest19172-1kworker/3:2H3
2266992012,5cyclictest1740-21systemctl3
226699201,17cyclictest6839-1kworker/3:2H3
226299208,10cyclictest15871-21sed2
2262992015,3cyclictest7470-21users2
2262992015,3cyclictest10013-21idleruntime2
2262992014,4cyclictest30746-21df_inode2
2262992014,4cyclictest27773-21memory2
2262992014,4cyclictest22488-21seq2
2262992013,4cyclictest3651-21grep2
2257992015,3cyclictest634-21snmpd1
2257992014,4cyclictest25839-21expr1
2257992014,4cyclictest23372-21df1
2257992014,4cyclictest16740-21mktemp1
2257992013,4cyclictest6974-21seq1
2249992017,2cyclictest0-21swapper/00
2249992015,3cyclictest4897-21aten2_r9power_p0
2249992015,3cyclictest13190-21cut0
2249992014,4cyclictest634-21snmpd0
1152622014,3sleep211688-21awk2
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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