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2023-02-04 - 19:43

x86 AMD 1950X @3700 MHz, Linux 5.10.47-rt46 (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 Sat Feb 04, 2023 12:50:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
210659929386,10cyclictest143-21ksoftirqd/2112:13:4614
197372274266,6sleep50-21swapper/507:09:2927
209789917325,114cyclictest0-21swapper/709:26:0129
231191172162,6phc2sys0-21swapper/207:05:1312
2279911510,143ptp4l0-21swapper/107:05:341
20978991471,87cyclictest0-21swapper/709:51:0829
20978991471,87cyclictest0-21swapper/709:51:0829
20978991460,86cyclictest0-21swapper/712:25:2029
209489914539,104cyclictest0-21swapper/311:20:5023
209489914539,104cyclictest0-21swapper/311:20:4923
210839914333,61cyclictest0-21swapper/2508:22:3518
21027991430,78cyclictest0-21swapper/1411:15:246
21027991430,78cyclictest0-21swapper/1411:15:246
210839914234,72cyclictest0-21swapper/2507:31:4918
210279914228,65cyclictest0-21swapper/1409:46:256
20978991411,83cyclictest0-21swapper/707:25:1529
20978991411,82cyclictest0-21swapper/711:50:1829
20978991410,86cyclictest0-21swapper/707:50:2229
20978991410,83cyclictest0-21swapper/710:35:2929
20978991410,83cyclictest0-21swapper/710:35:2929
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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