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2026-04-28 - 18:09
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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 50 highest latencies:
System rackdslot0.osadl.org (updated Tue Apr 28, 2026 00:46:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9607992725,1cyclictest629-21mii-tool23:40:152
9598992414,5cyclictest0-21swapper/023:20:190
960399224,12cyclictest0-21swapper/100:10:001
9598992118,2cyclictest25917-21php7.019:39:010
959899200,19cyclictest843-21systemd-network23:58:160
959899200,17cyclictest0-21swapper/021:28:330
960799192,16cyclictest22548-21cpuspeed_turbos20:30:132
960799192,16cyclictest15542-21smartctl22:10:182
9607991917,1cyclictest0-21swapper/222:40:152
960799190,2cyclictest13325-21latency_hist20:15:012
960799190,16cyclictest3979-21H222:10:212
960399192,16cyclictest14499-21snapd22:27:581
9603991917,1cyclictest0-21swapper/123:15:181
9603991917,1cyclictest0-21swapper/123:15:181
9598991917,1cyclictest0-21swapper/019:34:480
9598991916,2cyclictest16536-21sed22:15:010
9598991916,2cyclictest1100-21snmpd21:00:010
959899190,3cyclictest25911-21iwlist20:35:160
960799182,15cyclictest4338-21cpuspeed_turbos22:50:142
9607991816,1cyclictest0-21swapper/222:18:572
9607991816,1cyclictest0-21swapper/200:26:472
9607991815,2cyclictest27669-21nfsd419:40:182
9607991815,2cyclictest1811-21timerwakeupswit21:45:232
9607991814,3cyclictest26455-21ntp_states22:30:182
9607991814,3cyclictest0-21swapper/223:05:012
960799180,17cyclictest16302-21apt-key20:20:002
960799180,17cyclictest0-21swapper/222:22:412
960799180,16cyclictest5525-21munin-plugin-st21:55:002
960399182,1cyclictest16698-21ntp_offset21:15:211
960399182,15cyclictest0-21swapper/119:30:211
9603991814,1cyclictest0-21swapper/119:55:141
9603991813,2cyclictest3979-21H222:10:211
9598991815,2cyclictest5382-21nfsd422:50:190
9598991815,1cyclictest0-21swapper/019:46:220
959899181,16cyclictest9381-21nfsd420:05:180
959899180,17cyclictest14505-21snapd23:15:280
959899180,17cyclictest14505-21snapd23:15:280
959899180,17cyclictest0-21swapper/023:35:180
959899180,17cyclictest0-21swapper/021:10:210
959899180,15cyclictest0-21swapper/020:55:120
960799172,1cyclictest28-21ksoftirqd/200:04:402
9607991715,1cyclictest3989-21H222:10:212
9607991715,1cyclictest0-21swapper/220:20:222
9607991715,1cyclictest0-21swapper/219:50:222
9607991714,2cyclictest736-21cat20:50:012
9607991714,2cyclictest30055-21chrt20:41:462
9607991714,2cyclictest29870-21fschecks_time19:45:162
9607991714,2cyclictest28065-21ps23:30:162
9607991714,2cyclictest25812-21http_loadtime20:35:162
9607991714,2cyclictest21500-21cat23:20:142
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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