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2022-10-04 - 07:58

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 Tue Oct 04, 2022 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
89052242105,132sleep30-21swapper/319:07:353
87282238216,18sleep20-21swapper/219:05:322
87442181162,15sleep10-21swapper/119:05:431
90732174105,64sleep00-21swapper/019:09:270
936299354,30cyclictest0-21swapper/021:32:360
936299354,30cyclictest0-21swapper/021:32:360
9362993510,24cyclictest0-21swapper/023:45:310
936299339,23cyclictest0-21swapper/021:23:080
9365993115,15cyclictest0-21swapper/323:45:313
9363993115,15cyclictest0-21swapper/123:42:231
9363993114,16cyclictest0-21swapper/123:15:131
936299315,24cyclictest1767-21kworker/0:022:21:220
9364993016,14cyclictest0-21swapper/200:21:192
936299307,22cyclictest0-21swapper/022:53:340
936299303,26cyclictest0-21swapper/000:10:030
936299302,27cyclictest0-21swapper/000:02:000
9365992918,10cyclictest0-21swapper/323:44:433
9363992917,11cyclictest0-21swapper/123:49:231
936299293,25cyclictest0-21swapper/022:10:280
936299293,25cyclictest0-21swapper/000:09:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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