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2026-04-09 - 13:37
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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
Characteristics of the 50 highest latencies:
System rackeslot2.osadl.org (updated Thu Apr 09, 2026 00:43:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4855202790,1sleep0485518-21ssh22:32:080
205282993018,11cyclictest600837-21cstates23:50:590
205282993013,8cyclictest3827634-1atopacctd00:06:020
205282992918,10cyclictest399573-21kthreadcore21:36:040
205282992917,8cyclictest658894-21timerwakeupswit00:26:130
205282992915,9cyclictest591164-21runrttasks23:41:270
3598012280,2sleep20-21swapper/221:11:012
205283992721,2cyclictest134050irq/121-eno122:56:131
205282992715,11cyclictest3851705-21mta-sts-daemon00:22:320
20528299269,10cyclictest220542-21/usr/sbin/munin19:21:010
205282992616,9cyclictest487423-21cpuspeed_turbos22:36:010
205282992615,7cyclictest453141-21kthreadcore22:11:070
205282992614,11cyclictest0-21swapper/023:30:000
20528299261,1cyclictest264304-21apt-get19:55:580
205282992519,5cyclictest276971-21gpgconf20:05:000
205282992515,9cyclictest289931-21aten2.4-expect20:15:590
205282992514,10cyclictest582001-21kthreadcore23:36:060
205283992417,5cyclictest1290-21dbus-daemon21:00:011
20528299247,7cyclictest359248-21aten2.4-expect21:10:590
205282992417,6cyclictest368020-21kthreadcore21:16:060
205282992410,6cyclictest547123-21munin-run23:15:010
205282992410,6cyclictest0-21swapper/023:20:000
205283992319,2cyclictest0-21swapper/122:25:001
205283992311,6cyclictest0-21swapper/123:01:001
20528299239,7cyclictest593951-21irqcore23:46:050
20528299239,5cyclictest0-21swapper/000:40:020
20528299234,3cyclictest382047-21cstates21:26:000
205282992318,4cyclictest448671-21apt-key22:10:000
205282992317,5cyclictest459888-21kthreadcore22:16:060
205282992316,6cyclictest501390-21sh22:44:530
20528299231,5cyclictest471780-21ssh22:25:100
205282992315,6cyclictest441100-21latency_hist22:05:010
205282992315,3cyclictest573908-21kthreadcore23:31:060
205282992310,5cyclictest3827634-1atopacctd23:01:010
20528299230,9cyclictest504855-21cut22:46:110
20528299230,5cyclictest394934-21ssh21:31:390
205283992219,2cyclictest211864-21if_enp1s0.819:15:011
205283992217,1cyclictest2052921systemd-run19:10:011
205283992211,3cyclictest0-21swapper/122:00:591
20528299229,8cyclictest0-21swapper/023:05:580
20528299229,5cyclictest0-21swapper/000:04:530
20528299228,7cyclictest214214-21/usr/sbin/munin19:16:080
205282992216,5cyclictest353343-21gltestperf21:06:010
205282992216,5cyclictest317729-21kthreadcore20:36:060
205282992216,5cyclictest305254-21kthreadcore20:26:070
205282992215,6cyclictest641305-21kthreadcore00:16:050
205282992215,6cyclictest558090-21kthreadcore23:21:070
205282992215,6cyclictest522301-21mailstats22:56:180
205282992215,6cyclictest259356-21kthreadcore19:51:030
205282992215,2cyclictest634798-21kthreadcore00:11:050
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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