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2023-06-10 - 09:34

x86 Intel Atom E3845 @1910 MHz, Linux 4.19.37-rt19 (Profile)

Latency plot of system in rack #d, slot #4
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 -Up99 -i200 -h400 --smi -q
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Characteristics of the 10 highest latencies:
System rackdslot4.osadl.org (updated Sat Jun 10, 2023 00:46:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
529721570,5sleep13195799cyclictest19:20:291
1299911190,4ptp4l401ktimersoftd/319:08:183
3195799860,8cyclictest561-21rs:main1
3195799811,4cyclictest1258-21lldpd21:30:181
31958997145,7cyclictest33-21ksoftirqd/220:00:162
129991710,2ptp4l391rcuc/321:48:043
31957996960,5cyclictest25-21ksoftirqd/100:15:181
31957996954,9cyclictest25-21ksoftirqd/123:15:151
129991690,2ptp4l391rcuc/320:43:193
3137926842,8sleep10-21swapper/119:06:291
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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