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2026-07-15 - 00:52
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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 Tue Jul 14, 2026 12:43:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
146550830irq/30-eth0-tx-41ktimersoftd/012:17:250
81800rcu_preempt1446-21timerandwakeup09:31:521
81780rcu_preempt17620-21timerwakeupswit10:51:491
89950770irq/17-ehci_hcd0-21swapper/012:14:250
81770rcu_preempt23567-21diskmemload12:37:051
81770rcu_preempt0-21swapper/112:23:031
81740rcu_preempt9670-21munin-run08:21:230
81730rcu_preempt23567-21diskmemload11:57:080
81720rcu_preempt0-21swapper/111:51:411
81720rcu_preempt0-21swapper/111:51:411
81710rcu_preempt805-21kworker/u4:107:12:071
81710rcu_preempt24566-21ntp_states09:16:450
81710rcu_preempt21296-21diskmemload10:06:190
81710rcu_preempt13526-21sh11:40:050
81700rcu_preempt29927-21sh10:19:370
81700rcu_preempt15631-21sh10:49:340
81700rcu_preempt14825-21sh11:41:460
81690rcu_preempt29274-1kworker/0:0H10:28:590
81690rcu_preempt28353-21ssh11:11:210
81690rcu_preempt0-21swapper/009:51:400
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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