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2026-07-11 - 21:07
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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 rackdslot4.osadl.org (updated Sat Jul 11, 2026 12:45:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
125452205170,23sleep30-21swapper/307:08:403
123832205170,24sleep10-21swapper/107:06:331
125972202169,22sleep20-21swapper/207:09:192
125422200167,22sleep00-21swapper/007:08:370
156472630,5sleep315649-21apt-key07:15:013
252952610,2sleep20-21swapper/211:55:142
138491580,1ptp4l391rcuc/307:55:153
1310199582,17cyclictest27707-21grep12:00:133
1310199566,7cyclictest9278-21netstat09:10:233
250012530,2sleep00-21swapper/007:30:270
13099995345,5cyclictest22473-21cron11:49:591
1310199520,16cyclictest12104-21unixbench_multi12:30:283
1310199511,15cyclictest10137-21/usr/sbin/munin11:25:153
138491500,1ptp4l391rcuc/307:40:343
1310199506,6cyclictest31829-21phc2sys08:50:213
144892480,3sleep30-21swapper/311:30:273
1310199486,7cyclictest6350-21sed11:15:233
13101994828,17cyclictest614-21cron07:50:013
1310199480,15cyclictest5503-21/usr/sbin/munin10:10:183
1310199453,16cyclictest15553-21latency_hist08:20:003
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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