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2026-07-15 - 04:24
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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 Wed Jul 15, 2026 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2463125646,0sleep30-21swapper/319:24:183
2484923426,0sleep20-21swapper/219:26:502
2469023324,0sleep10-21swapper/119:25:011
2455223329,0sleep00-21swapper/019:23:230
249969977,0cyclictest0-21swapper/221:28:092
339960,0migration/330518-21sh22:56:143
339960,0migration/325778-21sh22:15:463
339960,0migration/319778-21sh22:31:393
339960,0migration/318032-21sh00:40:083
339960,0migration/313962-21sh00:01:373
29815060,0irq/29-eth0-tx-31065-40yum-updatesd-he19:28:010
29815060,0irq/29-eth0-tx-14706-21munin-node20:28:060
29805060,0irq/28-eth0-rx-3919-21awk23:53:093
27160,0ktimersoftd/20-21swapper/223:50:512
259960,0migration/210113-21sh22:23:492
249949960,0cyclictest0-21swapper/021:58:020
149960,0migration/03978-21sh22:39:390
149960,0migration/020382-21sh23:46:440
149960,0migration/015498-21kthreadcore23:23:010
149960,0migration/013767-21gltestperf21:32:560
149960,0migration/011858-21fschecks_time20:47:560
8305050,0irq/26-0000:00:0-21swapper/219:37:412
339950,0migration/37321-21kthreadcore23:38:013
339950,0migration/35869-21kthreadcore20:43:003
339950,0migration/34857-21kthreadcore22:03:003
339950,0migration/330762-21kthreadcore19:28:013
339950,0migration/327886-21fschecks_count23:32:553
339950,0migration/327679-21kthreadcore20:58:003
339950,0migration/325875-21fschecks_time23:12:563
339950,0migration/325230-21taskset20:56:053
339950,0migration/321582-21taskset20:32:033
339950,0migration/320688-21kthreadcore21:13:013
339950,0migration/320412-21kthreadcore23:28:013
339950,0migration/319431-21munin-node00:42:553
339950,0migration/318964-21unixbench_multi23:43:093
339950,0migration/315575-21taskset23:06:233
339950,0migration/315281-21fschecks_time19:42:553
339950,0migration/311025-21kthreadcore22:43:013
339950,0migration/310775-21timerwakeupswit21:28:083
329950,0watchdog/34847-21if_eth119:57:563
329950,0watchdog/33564-21diskstats22:22:573
329950,0watchdog/330056-21ssh22:37:573
329950,0watchdog/329117-21kthreadcore00:28:013
329950,0watchdog/328436-21kthreadcore20:13:003
329950,0watchdog/326527-21kthreadcore20:33:003
329950,0watchdog/317565-21cat21:53:003
329950,0watchdog/316350-21kthreadcore20:48:003
329950,0watchdog/30-21swapper/322:08:003
29815050,0irq/29-eth0-tx-7691-21munin-node23:02:562
29815050,0irq/29-eth0-tx-7460-21df_inode21:47:552
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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