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2026-01-07 - 08:00
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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 Wed Jan 07, 2026 00:43:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81770rcu_preempt0-21swapper/100:27:451
81760rcu_preempt19-21ksoftirqd/122:04:491
81750rcu_preempt0-21swapper/100:36:321
81740rcu_preempt0-21swapper/123:56:211
81740rcu_preempt0-21swapper/123:26:461
81740rcu_preempt0-21swapper/123:16:191
81730rcu_preempt5354-21wc22:46:061
81720rcu_preempt8871-21ssh22:51:260
81720rcu_preempt2138-21snmpd19:07:401
81720rcu_preempt19-21ksoftirqd/100:12:261
81720rcu_preempt11397-21/usr/sbin/munin22:56:231
81710rcu_preempt4549-21sh22:43:530
81710rcu_preempt0-21swapper/022:56:330
81690rcu_preempt6473-21diskmemload21:51:211
81690rcu_preempt0-21swapper/022:06:230
81680rcu_preempt0-21swapper/122:31:421
147850680irq/30-eth0-tx-41ktimersoftd/022:17:230
89450670irq/17-ehci_hcd0-21swapper/019:06:090
81670rcu_preempt0-21swapper/023:02:280
81670rcu_preempt0-21swapper/020:26:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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