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2023-06-07 - 01:41

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 Tue Jun 06, 2023 12:48:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
292919921626,134cyclictest0-21swapper/1510:25:217
292919915825,83cyclictest0-21swapper/1509:34:357
293719915333,95cyclictest0-21swapper/2708:50:2620
292789915321,130cyclictest0-21swapper/1208:25:254
292789915321,130cyclictest0-21swapper/1208:25:244
292789915121,105cyclictest0-21swapper/1207:21:534
292789915121,105cyclictest0-21swapper/1207:21:524
29371991492,91cyclictest0-21swapper/2711:38:5820
292789914917,107cyclictest0-21swapper/1210:00:014
293719914835,79cyclictest0-21swapper/2708:34:1420
293719914835,79cyclictest0-21swapper/2708:34:1420
29371991440,112cyclictest0-21swapper/2709:00:3520
29381991420,84cyclictest0-21swapper/2912:39:2822
292219914227,55cyclictest0-21swapper/609:20:0028
29216991390,82cyclictest0-21swapper/512:35:3227
291889913953,60cyclictest0-21swapper/109:55:321
291889913931,66cyclictest0-21swapper/108:45:281
292789913822,98cyclictest0-21swapper/1207:14:054
292789913822,98cyclictest0-21swapper/1207:14:044
291889913826,73cyclictest0-21swapper/107:20:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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