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2026-06-07 - 10:49
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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 Sun Jun 07, 2026 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1689924940,0sleep10-21swapper/119:24:311
1674623626,0sleep20-21swapper/219:22:472
1667823430,0sleep30-21swapper/319:22:003
1669923026,0sleep00-21swapper/019:22:090
16976991010,0cyclictest0-21swapper/021:25:020
339970,0migration/315720-21kthreadcore21:34:553
29805070,0irq/28-eth0-rx-3524-21snmpd23:25:403
8305060,0irq/26-0000:00:31331-21munin-run19:34:343
8305060,0irq/26-0000:00:0-21swapper/320:39:353
339960,0migration/39068-21kthreadcore22:24:543
339960,0migration/38830-21aten_r1power_cu00:19:493
339960,0migration/38721-21sh22:06:053
339960,0migration/332483-21sh22:01:243
339960,0migration/329410-21irqrtprio19:54:523
339960,0migration/316580-21kthreadcore23:44:543
29805060,0irq/28-eth0-rx-9514-21ssh23:21:523
29805060,0irq/28-eth0-rx-27035-21iostat23:14:523
29805060,0irq/28-eth0-rx-16419-21iostat_ios00:04:523
29805060,0irq/28-eth0-rx-12674-21python19:39:593
29805060,0irq/28-eth0-rx-0-21swapper/300:25:203
169879964,0cyclictest28235-21diskmemload21:33:502
169769964,0cyclictest32737-21awk19:34:510
339950,0migration/35178-21sh22:42:313
339950,0migration/331285-21kthreadcore20:39:533
339950,0migration/327213-21runrttasks23:33:083
339950,0migration/32607-21timerwakeupswit21:25:003
339950,0migration/325345-21fschecks_time20:14:493
339950,0migration/323852-21df_abs22:54:503
339950,0migration/322451-21kthreadcore20:09:543
339950,0migration/320507-21fschecks_time00:44:493
339950,0migration/314466-21kthreadcore22:09:563
339950,0migration/312327-21kthreadcore20:04:523
339950,0migration/31213-21kthreadcore20:19:533
329950,0watchdog/38522-21cut20:44:543
329950,0watchdog/35833-21yum19:35:023
329950,0watchdog/329343-21users21:40:033
329950,0watchdog/30-21swapper/320:29:543
329950,0watchdog/30-21swapper/300:11:553
29815050,0irq/29-eth0-tx-9862-21ssh22:09:152
29815050,0irq/29-eth0-tx-7637-21kthreadcore23:19:552
29815050,0irq/29-eth0-tx-3082-21chrt22:23:062
29815050,0irq/29-eth0-tx-29061-21ssh22:38:062
29815050,0irq/29-eth0-tx-2678-21ssh23:35:542
29815050,0irq/29-eth0-tx-23837-21munin-node00:09:562
29815050,0irq/29-eth0-tx-20631-21ssh21:35:142
29815050,0irq/29-eth0-tx-19699-21munin-node00:44:552
29815050,0irq/29-eth0-tx-17943-21fschecks_time23:09:492
29815050,0irq/29-eth0-tx-14330-21ssh00:03:002
29815050,0irq/29-eth0-tx-0-21swapper/223:45:302
29815050,0irq/29-eth0-tx-0-21swapper/223:16:512
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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