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2026-07-20 - 13:18
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Data to construct the above plot have been generated using the RT test utility cyclictest.

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 rackcslot3.osadl.org (updated Mon Jul 20, 2026 00:43:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81760rcu_preempt21840-21sshd19:15:191
81730rcu_preempt21199-21sendmail-msp00:06:510
81730rcu_preempt17304-21ssh23:58:340
81720rcu_preempt1638-21sh22:35:580
81720rcu_preempt15049-21df_abs20:57:050
81710rcu_preempt24285-21/usr/sbin/munin21:22:190
81700rcu_preempt0-21swapper/023:51:190
81690rcu_preempt26941-21munin-run19:36:500
81690rcu_preempt0-21swapper/122:07:071
81680rcu_preempt0-21swapper/121:02:041
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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