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2026-09-02 - 09:10
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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 20 highest latencies:
System rackeslot2.osadl.org (updated Wed Sep 02, 2026 00:43:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
313372421110,2sleep30-21swapper/320:44:533
34356442490,1sleep00-21swapper/023:40:160
31940382430,2sleep20-21swapper/221:24:482
3000623992421,1cyclictest0-21swapper/222:33:142
3000621992414,6cyclictest3207466-21cstates21:34:530
300062299230,18cyclictest3506110-21cut00:20:011
300062199228,8cyclictest0-21swapper/021:29:260
3000621992218,3cyclictest24614-21JS14:54:060
3000621992213,5cyclictest3375959-21cstates23:09:430
35156982210,3sleep30-21swapper/300:24:493
3000623992118,1cyclictest0-21swapper/221:31:092
3000622992112,5cyclictest3319543-21switchtime22:34:551
300062199211,6cyclictest3260097-21apt-get22:04:260
3000621992112,5cyclictest3172346-21if_enp1s0.821:14:490
3000623992012,4cyclictest0-21swapper/222:54:252
3000623992012,4cyclictest0-21swapper/222:54:252
3000621992013,6cyclictest3331875-21fschecks_count22:44:460
3000621992013,2cyclictest3313383-21apt-get22:34:260
3000621992012,4cyclictest3481885-21/usr/sbin/munin00:09:500
3000621992012,4cyclictest3481885-21/usr/sbin/munin00:09:500
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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