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2026-08-10 - 10:50
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Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 50 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 rack4slot2.osadl.org (updated Mon Aug 10, 2026 00:43:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
74502290,0irq/46-4a10000020936-1kworker/u3:019:05:020
7350880,0irq/45-4a100000445-21runrttasks21:10:480
7350870,0irq/45-4a100000455-21runrttasks22:45:440
2255528715,0sleep021817-21sendmail-msp20:40:480
7350860,0irq/45-4a10000024304-21nfs_client22:20:520
7350850,0irq/45-4a10000019177-21awk23:40:520
7350840,0irq/45-4a10000016682-21sendmail-msp22:00:520
7350830,0irq/45-4a1000001747-21diskstats19:40:200
7450820,0irq/46-4a1000005650-21gzip19:50:460
7350820,0irq/45-4a1000009856-21sendmail-msp21:40:370
7350820,0irq/45-4a1000008596-21diskstats20:00:290
7350820,0irq/45-4a10000029675-21sensors21:01:030
7350820,0irq/45-4a10000028724-21/usr/sbin/munin00:10:580
7350820,0irq/45-4a10000023065-21hostname19:10:040
7350820,0irq/45-4a10000015789-21ntpdc20:20:510
7350810,0irq/45-4a1000003349-21df21:20:120
7350810,0irq/45-4a10000032160-21latency_hist00:20:020
7350810,0irq/45-4a10000032026-21cron19:34:530
7350810,0irq/45-4a10000025212-21sendmail-msp00:00:060
7450800,0irq/46-4a100000930-1kworker/u3:021:17:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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