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2026-01-03 - 02:47
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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 Fri Jan 02, 2026 00:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
214192355277,43sleep30-21swapper/33
213292306271,24sleep00-21swapper/00
213052274206,55sleep10-21swapper/11
2174899262258,2cyclictest0-21swapper/22
2174499258251,4cyclictest11530-21ntp_states1
215912257180,43sleep20-21swapper/22
2175399153149,2cyclictest0-21swapper/33
21740999994,3cyclictest634-21snmpd0
276402620,1sleep30-21swapper/33
257342480,1sleep30-21swapper/33
240112450,1sleep20-21swapper/22
146722370,2sleep30-21swapper/33
2175399309,18cyclictest0-21swapper/33
2175399309,18cyclictest0-21swapper/33
2175399309,18cyclictest0-21swapper/33
2175399298,18cyclictest0-21swapper/33
2175399288,17cyclictest0-21swapper/33
219412270,2sleep30-21swapper/33
2175399277,17cyclictest0-21swapper/33
6832260,2sleep00-21swapper/00
2175399266,17cyclictest0-21swapper/33
21753992613,12cyclictest35-21ksoftirqd/33
2175399245,17cyclictest5151-21sendmail-mta3
2175399245,17cyclictest2358-21sendmail-mta3
2175399245,16cyclictest0-21swapper/33
2175399241,3cyclictest351ksoftirqd/33
21753992412,3cyclictest35-21ksoftirqd/33
21748992417,4cyclictest20219-21dump-pmu-power2
304852230,2sleep20-21swapper/22
2175399234,17cyclictest4085-21sendmail-mta3
2175399234,17cyclictest30709-21sendmail-mta3
2175399234,17cyclictest20462-21sendmail-mta3
2175399234,17cyclictest1012-21sendmail-mta3
2175399232,19cyclictest0-21swapper/33
2175399232,19cyclictest0-21swapper/33
2175399232,18cyclictest0-21swapper/33
2175399231,2cyclictest111rcu_preempt3
2175399229,11cyclictest18604-21wc3
2175399223,17cyclictest29373-21sendmail-mta3
2175399223,17cyclictest28319-21sendmail-mta3
2175399223,17cyclictest27450-21latency_hist3
2175399223,17cyclictest22926-21sendmail-mta3
2175399223,17cyclictest22148-21sendmail-mta3
2175399223,17cyclictest18149-21latency_hist3
2175399223,17cyclictest13326-21sendmail-mta3
2175399222,3cyclictest0-21swapper/33
2175399222,18cyclictest0-21swapper/33
2174899228,11cyclictest571-21gdbus2
21744992218,2cyclictest662-21runrttasks1
21744992218,2cyclictest662-21runrttasks1
21744992215,4cyclictest9009-21cron1
2174499221,10cyclictest234212expr1
21740992215,4cyclictest24733-21grep0
2175399218,2cyclictest18407-21cat3
2175399212,17cyclictest6261-21cat3
2175399212,17cyclictest16877-21latency_hist3
2175399212,11cyclictest35-21ksoftirqd/33
21753992116,3cyclictest35-21ksoftirqd/33
21753992116,3cyclictest0-21swapper/33
2175399211,4cyclictest515-21avahi-daemon3
2175399211,3cyclictest8322-21taskset3
2175399211,17cyclictest340-21systemd-journal3
2175399211,17cyclictest340-21systemd-journal3
2175399211,17cyclictest24337-21munin-run3
2175399210,2cyclictest351ksoftirqd/33
2175399210,19cyclictest0-21swapper/33
2174899219,3cyclictest14198-21cat2
2174899219,3cyclictest14198-21cat2
21748992116,3cyclictest25435-21fw_packets2
21744992115,4cyclictest13095-21users1
21740992116,3cyclictest30694-21grep0
21740992115,4cyclictest30209-21diskstats0
21740992110,8cyclictest27485-21sendmail0
111952210,2sleep30-21swapper/33
2175399203,2cyclictest35-21ksoftirqd/33
2175399203,15cyclictest7327-21latency_hist3
21753992017,2cyclictest0-21swapper/33
21753992015,3cyclictest19132-21ls3
2175399201,3cyclictest10366-21munin-run3
2175399201,17cyclictest3213-21latency_hist3
2175399201,17cyclictest3213-21latency_hist3
2175399201,17cyclictest15269-21cat3
2175399200,3cyclictest26034-21rt-features3
2175399200,18cyclictest15887-21apt-config3
2174899202,15cyclictest12631-21cut2
21748992017,2cyclictest0-21swapper/22
21748992015,3cyclictest9631-21/usr/sbin/munin2
21748992015,3cyclictest4555-21sendmail_mailst2
21748992015,3cyclictest28094-21vmstat2
21748992015,3cyclictest25387-21ls2
21748992015,3cyclictest13512-21nfs4_client2
21748992015,3cyclictest11473-21gltestperf2
21748992014,4cyclictest8139-21seq2
21748992014,4cyclictest2456-21users2
21748992014,4cyclictest19295-21cut2
21748992014,4cyclictest19062-21cat2
21748992013,4cyclictest26090-21sh2
21748992013,4cyclictest2133-21latency2
21748992013,4cyclictest2133-21latency2
2174499204,7cyclictest520-21rs:main1
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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