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2026-05-25 - 14:39
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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 Mon May 25, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3100424334,0sleep10-21swapper/107:22:271
3073523526,0sleep20-21swapper/207:19:192
3082923329,0sleep00-21swapper/007:20:260
3080223026,0sleep30-21swapper/307:20:043
8305060,0irq/26-0000:00:10261-21sa109:23:342
4160,0ktimersoftd/07598-21kthreadcore11:48:510
339960,0migration/35201-21sh10:53:303
339960,0migration/33603-21sh09:36:483
339960,0migration/328274-21sh12:00:333
339960,0migration/328077-21munin-node10:28:493
339960,0migration/326928-21sh09:31:393
339960,0migration/322359-21irqcore09:08:503
339960,0migration/322044-21sh12:15:533
339960,0migration/319288-21sh11:54:303
339960,0migration/31729-21latency09:13:533
339960,0migration/315801-21kernelversion10:58:513
339960,0migration/314976-21kthreadcore10:38:523
339960,0migration/314976-21kthreadcore10:38:523
339960,0migration/31028-21sh12:42:503
339960,0migration/310032-21munin-node07:53:453
329960,0watchdog/32954-21taskset08:33:413
311919960,0cyclictest0-21swapper/207:58:592
311869960,0cyclictest0-21swapper/108:22:001
311789960,0cyclictest0-21swapper/008:43:460
29815060,0irq/29-eth0-tx-7292-21cut10:53:512
29815060,0irq/29-eth0-tx-28367-21munin-node09:13:590
29815060,0irq/29-eth0-tx-2693-21munin-node07:48:500
29805060,0irq/28-eth0-rx-11738-21iostat_ios09:23:513
29805060,0irq/28-eth0-rx-0-21swapper/309:53:013
249960,0watchdog/228041-21munin-node09:34:012
149960,0migration/08856-21sh10:17:320
149960,0migration/030917-21kthreadcore08:28:520
149960,0migration/025718-21timerwakeupswit09:29:010
149960,0migration/021119-21fschecks_count10:43:480
149960,0migration/013529-21sh12:11:110
339950,0migration/38664-21kthreadcore08:13:513
339950,0migration/38326-21kthreadcore10:53:523
339950,0migration/37929-21kthreadcore07:48:523
339950,0migration/36087-21kthreadcore09:18:523
339950,0migration/35854-21munin-node12:23:563
339950,0migration/34701-21taskset09:53:543
339950,0migration/330545-21munin-node10:08:533
339950,0migration/324366-21munin-node10:23:553
339950,0migration/322827-21kthreadcore08:43:523
339950,0migration/32158-21kthreadcore12:03:523
339950,0migration/321430-21fschecks_count08:23:473
339950,0migration/314560-21fschecks_count09:03:493
339950,0migration/313126-21kthreadcore12:48:533
339950,0migration/311506-21kthreadcore08:58:523
339950,0migration/310167-21kthreadcore11:13:523
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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