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2021-06-17 - 19:59

AMD Ryzen Threadripper 1950X 16-Core Processor, Linux 5.4.47-rt28 (Profile)

Latency plot of system in rack #c, slot #8
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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rackcslot8.osadl.org (updated Thu Jun 10, 2021 13:18:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2307912850,270ptp4l0-21swapper/107:05:241
168109917715,110cyclictest0-21swapper/3009:46:5124
167029917221,103cyclictest0-21swapper/1211:07:404
167029917221,103cyclictest0-21swapper/1211:07:404
167759916214,147cyclictest28042-21runrttasks12:25:0116
167029916017,115cyclictest0-21swapper/1210:09:214
167029916017,115cyclictest0-21swapper/1210:09:214
168109915615,93cyclictest0-21swapper/3009:19:1124
16741991513,110cyclictest0-21swapper/1611:15:198
16741991510,123cyclictest0-21swapper/1611:30:178
234191148138,7phc2sys0-21swapper/207:05:2312
16741991483,118cyclictest0-21swapper/1611:15:008
16741991483,100cyclictest0-21swapper/1609:20:218
168109914615,74cyclictest13227-21runrttasks08:49:4224
16741991443,97cyclictest0-21swapper/1609:30:018
166969914354,51cyclictest0-21swapper/1108:10:253
167029914250,51cyclictest0-21swapper/1210:10:024
167029914250,51cyclictest0-21swapper/1210:10:024
16741991394,96cyclictest0-21swapper/1611:40:258
167309913950,61cyclictest0-21swapper/1510:40:577
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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