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2025-11-15 - 13:27
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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 20 highest latencies:
System rackcslot3.osadl.org (updated Sat Nov 15, 2025 00:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81820rcu_preempt3-21ksoftirqd/000:20:170
90050780irq/17-ehci_hcd946-21usb-storage21:43:340
81720rcu_preempt7679-21latency23:20:181
81720rcu_preempt0-21swapper/119:06:051
81710rcu_preempt0-21swapper/023:15:160
81690rcu_preempt9283-21ssh00:25:100
81690rcu_preempt0-21swapper/121:35:191
81690rcu_preempt0-21swapper/100:25:251
81690rcu_preempt0-21swapper/021:36:190
81680rcu_preempt25611-21cron21:54:571
81680rcu_preempt16046-21open_inodes22:35:210
81680rcu_preempt14141-1kworker/1:2H23:11:551
81680rcu_preempt0-21swapper/122:38:581
81670rcu_preempt17842-21/usr/sbin/munin23:40:141
81670rcu_preempt14589-21munin-run21:34:581
81670rcu_preempt11805-21df_abs19:45:161
81670rcu_preempt0-21swapper/122:28:241
81660rcu_preempt9097-21latency_hist00:24:581
81660rcu_preempt26584-21irqstats22:55:170
81660rcu_preempt15054-21turbostat.cron22:34:570
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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