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2022-05-29 - 00:09

x86 Intel Core i5-750 @2667 MHz, Linux 4.9.47-rt37 (Profile)

Latency plot of system in rack #8, slot #3
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 -Sp99 -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 rack8slot3.osadl.org (updated Sat May 28, 2022 12:45:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
265702180163,13sleep10-21swapper/107:08:081
263312179108,66sleep30-21swapper/307:05:253
263372177158,15sleep20-21swapper/207:05:272
265422176108,64sleep00-21swapper/007:07:470
314372840,6sleep30-21swapper/309:20:003
181272830,5sleep32698499cyclictest09:52:243
264712760,5sleep32698499cyclictest09:11:313
26984993512,22cyclictest0-21swapper/307:15:203
26984993416,17cyclictest0-21swapper/311:27:563
2698399343,30cyclictest0-21swapper/211:06:022
2698499339,23cyclictest0-21swapper/307:40:193
26984993315,17cyclictest0-21swapper/312:18:163
26984993313,19cyclictest0-21swapper/310:23:353
26984993312,20cyclictest0-21swapper/312:25:583
26984993312,20cyclictest0-21swapper/311:48:083
26984993312,20cyclictest0-21swapper/310:40:533
2698199332,30cyclictest0-21swapper/010:44:440
26984993213,18cyclictest0-21swapper/311:06:033
26984993212,19cyclictest0-21swapper/311:50:093
2698399323,28cyclictest0-21swapper/207:40:192
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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