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2023-01-29 - 07:26

x86 Intel Core i5-8365UE @1600 MHz, Linux 6.0.0-rt11 (Profile)

Latency plot of system in rack #e, slot #1
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 -Sp90 -i200 -h400 -q done
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 20 highest latencies:
System rackeslot1.osadl.org (updated Tue Oct 11, 2022 12:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3182916902418,2cyclictest0-21swapper/011:40:000
318291790221,16cyclictest3497273-21apt-get09:30:151
3182917902017,2cyclictest3538862-21apt-config10:05:001
318291790200,15cyclictest3545408-21tr10:10:141
3182916901915,3cyclictest3496464-21kworker/u8:1-ext4-rsv-conversion09:50:000
318291690183,4cyclictest3619642-21kworker/u8:0+events_unbound10:57:370
3182917901714,2cyclictest3565126-21kthreadcore10:25:181
3182917901714,2cyclictest3364878-21systemctl08:50:001
3182917901714,2cyclictest3364878-21systemctl08:50:001
3182917901713,3cyclictest3707279-21kthreadcore12:05:231
3182917901713,3cyclictest3707279-21kthreadcore12:05:221
3182917901713,3cyclictest3387719-21irq-smp_affinit09:05:241
3182916901714,2cyclictest3188851-21perf07:15:010
3182916901714,2cyclictest3188851-21perf07:15:000
3182916901713,2cyclictest1592-21systemd-logind10:55:020
3182916901713,1cyclictest441rcuog/212:23:290
3182916901712,2cyclictest441rcuog/207:53:460
3182921901613,1cyclictest0-21swapper/211:20:012
318291790169,1cyclictest181rcu_preempt09:25:141
3182917901613,2cyclictest3612790-21pmu-power10:45:271
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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