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2022-01-16 - 12:03

Intel(R) Celeron(R) M processor 1.50GHz, Linux 4.18.7-rt5 (Profile)

Latency plot of system in rack #6, slot #5
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -n -a0 -t1 -p99 -i200 -h400 -q
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Characteristics of the 20 highest latencies:
System rack6slot5.osadl.org (updated Sun Jan 16, 2022 00:51:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
273999960913375,2706cyclictest13737-21kworker/0:219:16:250
273999948402603,2222cyclictest29204-21kworker/0:319:14:420
272012782186,206sleep00-21swapper19:09:010
27399995235,457cyclictest19215-21idleruntime21:35:230
273999952333,476cyclictest1572-21ssh22:08:460
27399995224,457cyclictest16020-21copy20:06:120
27399995212,458cyclictest17274-21grep21:30:400
27399995203,457cyclictest382250irq/10-yenta00:31:520
27399995202,457cyclictest9031-21chrt23:43:140
27399995202,457cyclictest12620-21cut23:51:040
27399995192,457cyclictest387650irq/10-eth021:50:100
27399995192,456cyclictest23371-21latency_hist20:25:020
273999951624,422cyclictest11-21rcu_preempt23:25:470
273999951423,430cyclictest3996-21munin-node21:00:370
273999951324,307cyclictest780-21runrttasks00:37:590
273999951122,428cyclictest14058-21munin-node23:55:200
273999950620,424cyclictest6962-21awk19:40:200
273999950322,410cyclictest10741-21basename22:30:200
273999950060,379cyclictest101ktimersoftd/023:10:090
273999949824,404cyclictest23418-21ssh00:15:370
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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