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2025-12-14 - 14:15
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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 00:43:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
211002318236,69sleep30-21swapper/33
219242291202,76sleep00-21swapper/00
2212799273269,2cyclictest0-21swapper/11
217722265199,36sleep10-21swapper/11
218762258185,24sleep20-21swapper/22
2213099231224,4cyclictest27120-21sendmail2
2213399172165,4cyclictest27109-21munin-run3
2212299121116,3cyclictest27138-21idleruntime-cro0
123732700,2sleep20-21swapper/22
284752480,3sleep32213399cyclictest3
2212799391,21cyclictest22406-21df1
2212799380,23cyclictest593-21cut1
2212799370,25cyclictest27542-21seq1
2212799370,21cyclictest30168-21systemctl1
22130993616,6cyclictest28-21ksoftirqd/22
2212799331,29cyclictest517-21dbus-daemon1
2212799331,17cyclictest4282-21ntp_states1
2212799331,17cyclictest0-21swapper/11
2212799330,19cyclictest740-21/usr/sbin/munin1
22127993216,14cyclictest27375-21find1
2213399301,26cyclictest0-21swapper/33
2212799300,27cyclictest32229-21cat1
22127992914,13cyclictest4142-21sed1
22127992914,13cyclictest17926-21basename1
2212799291,25cyclictest566-21polkitd1
2212799290,16cyclictest22572-21/usr/sbin/munin1
265322280,5sleep22213099cyclictest2
22127992815,11cyclictest662-21runrttasks1
22127992815,11cyclictest10909-21/usr/sbin/munin1
22127992814,12cyclictest20750-21apt-config1
2212799280,26cyclictest340-21systemd-journal1
2212799280,15cyclictest0-21swapper/11
22130992715,3cyclictest28-21ksoftirqd/22
2212799279,15cyclictest15621-21grep1
22127992712,12cyclictest662-21runrttasks1
22127992711,13cyclictest517-21dbus-daemon1
22127992711,13cyclictest12723-21cat1
2212799270,25cyclictest27072-21cat1
2212799270,15cyclictest3062-21telnet1
22122992721,4cyclictest7705-21awk0
2213099267,11cyclictest28-21ksoftirqd/22
2212799269,14cyclictest5841-21seq1
2212799269,14cyclictest1263-21ls1
2212799268,15cyclictest26107-21/usr/sbin/munin1
2212799262,20cyclictest25051-21apt-get1
2212799261,22cyclictest20670-21cat1
22127992612,11cyclictest30197-21open_inodes1
22127992611,12cyclictest21009-21sh1
22127992610,14cyclictest3955-21seq1
22127992610,13cyclictest19729-21cstates1
2212799260,14cyclictest634-21snmpd1
2212799259,14cyclictest9232-21expr1
2212799259,14cyclictest20014-21expr1
2212799259,13cyclictest5667-21cat1
2212799259,13cyclictest31370-21awk1
2212799253,17cyclictest12561-21apt-get1
2212799251,22cyclictest12893-21munin-run1
22127992511,12cyclictest17199-21aten2_r9power_c1
78972240,3sleep22213099cyclictest2
2213399246,17cyclictest35-21ksoftirqd/33
2212799249,13cyclictest10584-21cat1
2212799249,12cyclictest25253-21aten2_r9power_c1
2212799249,12cyclictest25253-21aten2_r9power_c1
2212799248,14cyclictest8050-21cat1
2212799248,14cyclictest30020-21sendmail-mta1
2212799248,14cyclictest23188-21date1
2212799248,13cyclictest7600-21cpu1
2212799248,13cyclictest32217-21open_files1
2212799247,14cyclictest8791-21expr1
2212799247,14cyclictest8791-21expr1
2212799241,20cyclictest517-21dbus-daemon1
2212799241,20cyclictest28897-21sshd1
22122992418,4cyclictest11535-21apt-get0
214392240,1sleep10-21swapper/11
2213399235,1cyclictest0-21swapper/33
2213399234,17cyclictest15320-21latency_hist3
22130992315,5cyclictest517-21dbus-daemon2
2212799236,15cyclictest24141-21sed1
2212799236,15cyclictest24141-21sed1
2212799234,16cyclictest16618-21hostname1
2212799231,20cyclictest14962-21cstates1
2212799231,19cyclictest7725-21grep1
2212799231,19cyclictest30555-21find1
2212799231,19cyclictest1077-21cpu1
22127992310,11cyclictest18455-21ntp_kernel_pll_1
22122992317,4cyclictest14341-21turbostat.cron0
22122992314,5cyclictest340-21systemd-journal0
257942220,7sleep228-21ksoftirqd/22
2213399224,16cyclictest6040-21sendmail-mta3
2213399224,16cyclictest5016-21sendmail-mta3
2213399224,10cyclictest111rcu_preempt3
2213399223,17cyclictest620-21sendmail-mta3
2213399223,17cyclictest30735-21sendmail-mta3
2213399223,17cyclictest24215-21sendmail-mta3
2213399222,18cyclictest2904-21apt-key3
2213399221,4cyclictest340-21systemd-journal3
2213399221,4cyclictest25210-1kworker/3:1H3
2212799227,13cyclictest9284-21cpuspeed_turbos1
2212799221,18cyclictest9012-21latency_hist1
2212799221,17cyclictest0-21swapper/11
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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