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2021-07-26 - 19:14

Intel(R) Atom(TM) CPU E3845 @ 1.91GHz, 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 20 highest latencies:
System rackdslot4.osadl.org (updated Mon Jul 26, 2021 12:46:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1208911990,6ptp4l401ktimersoftd/307:07:443
1961021760,6sleep12886499cyclictest10:15:251
2383821750,5sleep22886599cyclictest11:40:212
28863998376,4cyclictest9-21ksoftirqd/011:05:130
284112825,18sleep00-21swapper/007:09:560
120891810,17ptp4l29452-21ssh09:10:033
28863997870,4cyclictest9-21ksoftirqd/010:55:150
198822770,7sleep12886499cyclictest08:55:391
28863997364,5cyclictest9-21ksoftirqd/007:30:120
282292722,58sleep20-21swapper/207:07:402
282602714,54sleep10-21swapper/107:08:031
28863997063,4cyclictest9-21ksoftirqd/008:15:130
26062700,9sleep02886399cyclictest08:35:190
28865996629,9cyclictest33-21ksoftirqd/210:46:362
28866996555,5cyclictest41-21ksoftirqd/309:05:153
28863996556,5cyclictest9-21ksoftirqd/011:45:150
28865996428,9cyclictest33-21ksoftirqd/209:23:012
28865996426,10cyclictest33-21ksoftirqd/208:25:322
28863996457,4cyclictest9-21ksoftirqd/009:15:160
28863996454,5cyclictest9-21ksoftirqd/009:50:100
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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