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2026-04-14 - 15:05
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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 20 highest latencies:
System rackfslot7.osadl.org (updated Tue Apr 14, 2026 00:46:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1271048991140,1cyclictest0-21swapper/519:40:025
1271048998323,59cyclictest1333373-21fschecks_count21:00:165
1271040998382,1cyclictest34-21ksoftirqd/119:40:021
127104899790,39cyclictest1421826-21taskset23:40:125
1271048997818,39cyclictest1318727-21latency_hist20:35:015
1271048997633,40cyclictest1360644-21cpuspeed_turbos21:50:145
1271048997618,39cyclictest1431161-21ntpq23:55:185
1271048997335,19cyclictest1450863-21taskset00:30:215
1271048997313,59cyclictest1444508-21/usr/sbin/munin00:20:155
1271048997233,19cyclictest0-21swapper/523:31:145
1271048997233,19cyclictest0-21swapper/520:52:475
1271048997232,19cyclictest0-21swapper/519:52:045
1271048997112,19cyclictest0-21swapper/522:54:255
1271048997011,19cyclictest0-21swapper/521:35:535
1271048997011,19cyclictest0-21swapper/521:16:465
1271048997011,19cyclictest0-21swapper/521:16:455
1271048996911,19cyclictest0-21swapper/519:20:095
1271048996911,0cyclictest0-21swapper/521:28:575
1271048996911,0cyclictest0-21swapper/519:48:455
1271048996910,19cyclictest0-21swapper/523:03:215
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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