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2026-03-16 - 03:10
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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 Sun Mar 15, 2026 12:46:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
693182998326,38cyclictest808372-21systemctl10:40:024
693182997718,58cyclictest782052-21irqstats09:50:164
693182997235,19cyclictest362-21jbd2/sda2-810:49:474
693182997133,38cyclictest362-21jbd2/sda2-808:36:284
693182997032,19cyclictest362-21jbd2/sda2-809:08:274
693182996930,38cyclictest864180-21aten2.4_rfpower12:20:124
693182996831,18cyclictest828811-21ntp_states11:15:204
693182996810,39cyclictest852241-21apt-config12:00:004
693182996810,39cyclictest824507-21kworker/u32:3+ext4-rsv-conversion11:10:024
693182996728,39cyclictest0-21swapper/410:41:064
69318299668,39cyclictest709941-21/usr/sbin/munin07:40:234
69318299657,39cyclictest798353-21if_enxbe3af2b6010:20:154
69318299646,39cyclictest1086-21runrttasks12:12:234
69318299634,40cyclictest721374-21df_inode08:00:144
69318299622,59cyclictest750052-21grep08:50:244
69318299622,59cyclictest750052-21grep08:50:234
69318299591,39cyclictest720862-21kworker/u32:4+events_unbound08:06:404
693182995840,18cyclictest0-21swapper/409:14:364
693182995819,19cyclictest362-21jbd2/sda2-809:48:284
693180995838,1cyclictest421ktimers/209:05:162
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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