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2026-04-21 - 06:39
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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 10 highest latencies:
System rackbslot7.osadl.org (updated Tue Apr 21, 2026 00:44:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2127821099,70sleep121322-21/usr/sbin/munin18:58:281
22188999651,23cyclictest13346-21ssh22:23:142
22188999411,43cyclictest39-21ksoftirqd/219:18:342
22179999431,28cyclictest0-21swapper/023:00:160
2218899912,64cyclictest1555-21kworker/u18:2+ext4-rsv-conversion22:58:322
22188999111,39cyclictest39-21ksoftirqd/223:22:042
22188999111,39cyclictest39-21ksoftirqd/223:22:042
208672919,54sleep220946-21fschecks_time18:58:132
2218899902,40cyclictest39-21ksoftirqd/221:50:332
22188998921,34cyclictest39-21ksoftirqd/223:49:482
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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