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2024-04-24 - 07:06
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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 Apr 24, 2024 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2738624736,0sleep00-21swapper/018:51:110
2759224331,0sleep30-21swapper/318:53:383
2749123526,0sleep20-21swapper/218:52:252
2737723525,0sleep10-21swapper/118:51:041
27769991111,0cyclictest0-21swapper/020:55:010
4160,0ktimersoftd/023527-21ssh22:02:180
339960,0migration/39310-21timerwakeupswit21:15:193
339960,0migration/36697-21sh21:53:363
339960,0migration/36697-21sh21:53:363
339960,0migration/331610-21munin-node20:50:123
339960,0migration/329179-21sh21:45:253
339960,0migration/321287-21sh21:42:363
339960,0migration/314652-21kthreadcore19:55:063
29935060,0irq/33-eth0-tx-15650-21ssh23:12:402
29935060,0irq/33-eth0-tx-0-21swapper/200:13:112
29925060,0irq/32-eth0-rx-25899-21fschecks_count23:20:043
29925060,0irq/32-eth0-rx-22974-21cut20:00:063
29925060,0irq/32-eth0-rx-16082-40yum-updatesd-he22:15:183
277719960,0cyclictest32543-21diskmemload21:34:452
277719960,0cyclictest0-21swapper/220:50:462
277699960,0cyclictest0-21swapper/022:15:040
277699960,0cyclictest0-21swapper/020:05:000
149960,0migration/010841-21sh21:55:050
8315050,0irq/26-0000:00:23601-21grep22:20:122
339950,0migration/38396-21if_eth1.219:30:053
339950,0migration/37430-21kthreadcore00:05:073
339950,0migration/332555-21cpuspeed_turbos19:25:013
339950,0migration/331967-21kernelversion00:20:083
339950,0migration/331416-21munin-node20:05:093
339950,0migration/328983-21taskset00:15:483
339950,0migration/328835-21kthreadcore22:25:083
339950,0migration/328618-21taskset19:44:343
339950,0migration/328255-21taskset21:29:183
339950,0migration/324214-21missed_timers20:45:133
339950,0migration/323262-21kthreadcore22:20:123
339950,0migration/322565-21timerandwakeup22:00:143
339950,0migration/321845-21taskset22:57:163
339950,0migration/321648-21fschecks_count23:54:583
339950,0migration/320079-21kthreadcore19:35:123
339950,0migration/31886-21timerandwakeup18:55:173
339950,0migration/31793-21fschecks_time22:10:023
339950,0migration/317698-21taskset21:04:473
339950,0migration/31339-21gltestperf20:55:023
339950,0migration/313165-21kthreadcore20:15:043
329950,0watchdog/35275-21interrupts23:45:033
329950,0watchdog/330657-21ssh23:02:393
329950,0watchdog/329382-21df20:29:593
329950,0watchdog/325753-21kthreadcore20:25:073
329950,0watchdog/32236-21ssh23:40:433
329950,0watchdog/313823-21ssh22:54:073
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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