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2021-07-26 - 19:37

(undisclosed), Linux 4.9.20-rt16 (Profile)

Latency plot of system in rack #7, 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 -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 rack7slot1.osadl.org (updated Mon Jul 26, 2021 12:45:39)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1040521240,2sleep015504-21stress12:39:100
26568212155,23sleep30-21swapper/307:09:483
1891721100,7sleep22669699cyclictest10:30:252
26274210856,48sleep20-21swapper/207:06:252
203692950,1sleep020370-21/usr/sbin/munin11:45:420
2521928254,21sleep00-21swapper/007:05:220
2620327953,21sleep10-21swapper/107:05:361
2669399529,20cyclictest0-21swapper/012:20:030
26693995116,13cyclictest0-21swapper/012:15:310
26693995113,12cyclictest0-21swapper/010:25:200
2669399506,25cyclictest0-21swapper/011:40:040
26693995016,13cyclictest0-21swapper/008:20:110
26693995015,14cyclictest0-21swapper/011:40:010
26693994913,16cyclictest0-21swapper/011:50:370
26693994913,14cyclictest0-21swapper/010:00:180
2669399489,18cyclictest0-21swapper/007:29:200
2669399487,21cyclictest0-21swapper/011:05:370
2669399485,22cyclictest0-21swapper/007:30:290
26693994814,12cyclictest0-21swapper/009:45:160
2669399478,18cyclictest0-21swapper/012:33:520
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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