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2026-06-25 - 19:17
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
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 50 highest latencies:
System rack1slot2.osadl.org (updated Thu Jun 25, 2026 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2296825242,0sleep30-21swapper/307:22:543
2321923930,0sleep10-21swapper/107:25:481
2296723127,0sleep20-21swapper/207:22:532
2289422925,0sleep00-21swapper/007:22:020
339960,0migration/330903-21fschecks_count12:26:193
339960,0migration/330061-21sh11:31:083
339960,0migration/329043-21sh10:34:233
339960,0migration/328431-21munin-node08:36:203
339960,0migration/328177-21munin-node11:11:233
339960,0migration/324089-21taskset10:51:123
339960,0migration/323750-21taskset12:40:263
339960,0migration/322556-21sh09:53:053
329960,0watchdog/325151-21if_err_eth009:56:213
29815060,0irq/29-eth0-tx-28383-21if_err_eth112:06:232
29815060,0irq/29-eth0-tx-27625-21cpuspeed_turbos08:36:170
29815060,0irq/29-eth0-tx-0-21swapper/007:31:160
29805060,0irq/28-eth0-rx-2635-21diskstats08:41:193
29805060,0irq/28-eth0-rx-2181-21crond09:26:063
29805060,0irq/28-eth0-rx-19954-21ssh12:18:053
29805060,0irq/28-eth0-rx-1819-21ssh12:46:213
29805060,0irq/28-eth0-rx-1056-21switchtime10:16:313
29805060,0irq/28-eth0-rx-0-21swapper/312:44:553
233139960,0cyclictest0-21swapper/210:56:302
8305050,0irq/26-0000:00:30630-21cut07:31:062
339950,0migration/39542-21taskset09:27:523
339950,0migration/39542-21taskset09:27:523
339950,0migration/3682-21cpuspeed_turbos10:01:183
339950,0migration/332104-21irqrtprio07:31:223
339950,0migration/329942-21smart_nvme0n108:11:283
339950,0migration/329317-21kthreadcore12:06:253
339950,0migration/32537-21fschecks_count07:56:203
339950,0migration/324815-21sendmail_mailst12:01:273
339950,0migration/323850-21kthreadcore08:31:243
339950,0migration/319479-21taskset07:42:323
339950,0migration/317512-21munin-node08:06:203
339950,0migration/313079-21latency_hist09:11:063
339950,0migration/311522-21cpuspeed_turbos09:31:183
339950,0migration/310414-21munin-node08:01:203
329950,0watchdog/36314-21runrttasks12:52:343
329950,0watchdog/33548-21kthreadcore09:01:253
329950,0watchdog/321670-21python10:46:293
329950,0watchdog/313658-21sh10:42:373
329950,0watchdog/312383-21tr12:31:263
329950,0watchdog/30-21swapper/311:16:453
29815050,0irq/29-eth0-tx-6832-21munin-node10:41:182
29815050,0irq/29-eth0-tx-5868-21ssh10:40:162
29815050,0irq/29-eth0-tx-5802-21munin-node08:21:210
29815050,0irq/29-eth0-tx-3909-21munin-node11:31:252
29815050,0irq/29-eth0-tx-31550-21ssh09:58:282
29815050,0irq/29-eth0-tx-31103-21munin-node09:01:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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