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2026-07-16 - 17:01
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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 Thu Jul 16, 2026 12:45:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
138591204171,22phc2sys0-21swapper/307:07:553
302032203170,22sleep10-21swapper/107:06:021
304942201167,23sleep20-21swapper/207:09:492
301722201167,23sleep00-21swapper/007:05:370
2083921710,3sleep13080599cyclictest10:05:131
289112830,2sleep00-21swapper/010:20:210
138491730,6ptp4l3080799cyclictest10:08:273
3080499639,15cyclictest0-21swapper/010:40:150
30804996314,17cyclictest20903-21iwlist12:15:170
30804996114,15cyclictest16780-21mailstats11:00:230
30804996012,11cyclictest11929-21sed07:35:200
286492600,2sleep20-21swapper/209:15:162
30804995816,11cyclictest6661-21netstat11:45:200
30804995813,10cyclictest32032-21grep08:15:250
30804995712,17cyclictest13914-21cat10:55:180
3080499570,17cyclictest18179-21/usr/sbin/munin08:55:220
138491570,1ptp4l401ktimersoftd/311:35:233
30804995514,9cyclictest16183-21fschecks_count08:50:130
30804995513,15cyclictest12626-21latency_hist10:55:010
30804995511,15cyclictest0-21swapper/011:50:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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