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2025-12-23 - 06:42
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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 Tue Dec 23, 2025 00:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23652289212,42sleep30-21swapper/33
13082281205,41sleep00-21swapper/00
261599271267,2cyclictest0-21swapper/22
21402263189,25sleep20-21swapper/22
22162254219,23sleep10-21swapper/11
261199166160,3cyclictest32691-21apt-key1
261799165158,5cyclictest32765-21latency_hist3
831821530,1sleep20-21swapper/22
2890421440,2sleep12601-21cyclictest1
2844021420,1sleep10-21swapper/11
790421240,2sleep3261799cyclictest3
742321210,3sleep0260699cyclictest0
260699114110,2cyclictest0-21swapper/00
278892520,1sleep00-21swapper/00
149382470,1sleep30-21swapper/33
315582410,2sleep30-21swapper/33
261799320,30cyclictest14025-21kworker/3:13
277732300,7sleep091ksoftirqd/00
261799281,2cyclictest111rcu_preempt3
261799280,26cyclictest5977-21kworker/3:13
2617992713,7cyclictest111rcu_preempt3
261799267,3cyclictest0-21swapper/33
261799267,17cyclictest0-21swapper/33
261799266,17cyclictest6606-21idleruntime-cro3
261799260,24cyclictest0-21swapper/33
2606992621,3cyclictest21816-21ls0
261799255,3cyclictest0-21swapper/33
261799255,3cyclictest0-21swapper/33
261799255,17cyclictest0-21swapper/33
2617992512,11cyclictest35-21ksoftirqd/33
261799251,17cyclictest35-21ksoftirqd/33
261799245,3cyclictest0-21swapper/33
261799244,17cyclictest10549-21sendmail-mta3
261799244,17cyclictest0-21swapper/33
261799241,5cyclictest340-21systemd-journal3
261799241,17cyclictest515-21avahi-daemon3
2611992418,4cyclictest6268-21sort1
2606992418,4cyclictest7669-21head0
19682240,2sleep10-21swapper/11
261799239,7cyclictest111rcu_preempt3
261799234,17cyclictest0-21swapper/33
261799233,18cyclictest31542-21sendmail-mta3
261799232,19cyclictest520-21rs:main3
261799230,20cyclictest6116-21/usr/sbin/munin3
261599230,11cyclictest138632ntpq2
261799223,17cyclictest26886-21sendmail-mta3
261799223,17cyclictest23838-21latency_hist3
261799223,17cyclictest21449-21latency_hist3
261799223,17cyclictest1488-21sendmail-mta3
261799223,17cyclictest13484-21sendmail-mta3
261799222,18cyclictest0-21swapper/33
2617992217,3cyclictest517-21dbus-daemon3
261799221,18cyclictest5420-21munin-run3
261599220,21cyclictest18841-21kworker/2:22
2611992214,5cyclictest340-21systemd-journal1
2606992215,4cyclictest17510-21diskstats0
261799212,17cyclictest5889-21sendmail-mta3
261799212,17cyclictest5889-21sendmail-mta3
261799212,17cyclictest23356-21sendmail-mta3
261799212,17cyclictest16793-21latency_hist3
261799211,3cyclictest8620-1kworker/3:0H3
261799211,3cyclictest5455-1kworker/3:0H3
261799211,3cyclictest28520-21perf3
261799210,3cyclictest8620-1kworker/3:0H3
261799210,19cyclictest31271-21awk3
2615992112,7cyclictest662-21runrttasks2
261199212,17cyclictest27479-21sendmail-mta1
2611992118,2cyclictest0-21swapper/11
2611992115,4cyclictest10356-21sed1
2606992115,4cyclictest634-21snmpd0
261799202,16cyclictest17343-21cat3
2617992015,3cyclictest1172-21dpkg3
2617992014,4cyclictest31941-21find3
2617992014,4cyclictest12466-21awk3
2617992013,4cyclictest24585-21grep3
261799201,2cyclictest0-21swapper/33
261799201,2cyclictest0-21swapper/33
261799201,17cyclictest340-21systemd-journal3
261799201,17cyclictest0-21swapper/33
261799201,17cyclictest0-21swapper/33
261799200,19cyclictest0-21swapper/33
261599202,16cyclictest23167-21sort2
2615992017,2cyclictest0-21swapper/22
2615992015,3cyclictest28030-21unixbench_multi2
2615992015,3cyclictest26787-21if_err_enp3s02
2615992014,4cyclictest8822-21uptime2
2615992014,4cyclictest8514-21sed2
2615992014,4cyclictest27831-21ls2
2615992014,4cyclictest27585-21seq2
2615992014,4cyclictest20821-21seq2
2615992014,4cyclictest10421-21seq2
2615992014,3cyclictest23675-21sendmail_mailst2
2615992013,5cyclictest18981-21diskstats2
2615992013,4cyclictest28105-21ls2
261199205,3cyclictest21-21ksoftirqd/11
2611992017,2cyclictest0-21swapper/11
2611992017,2cyclictest0-21swapper/11
2611992015,3cyclictest634-21snmpd1
2611992015,3cyclictest21690-21seq1
2611992014,4cyclictest28309-21diskstats1
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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