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2022-05-26 - 00:20

x86 Intel Core i9-9900K @3600 MHz, Linux 5.15.32-rt39 (Profile)

Latency plot of system in rack #0, slot #7
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 rack0slot7.osadl.org (updated Wed May 25, 2022 00:45:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
13032932247240,4sleep40-21swapper/419:08:4910
13030572199180,9sleep140-21swapper/1419:06:356
13033102168152,9sleep30-21swapper/319:09:049
13029642154134,10sleep100-21swapper/1019:05:422
4065201020,55pipewire-pulse0-21swapper/1319:08:245
130204129289,1sleep70-21swapper/719:05:2313
409620910,90pipewire0-21swapper/219:09:208
406520890,59pipewire-pulse0-21swapper/519:08:1011
130333828165,8sleep60-21swapper/619:09:2312
409620800,71pipewire0-21swapper/019:05:150
130325927266,2sleep150-21swapper/1519:08:287
130335527150,14sleep10-21swapper/119:09:341
409620690,59pipewire0-21swapper/819:05:0114
1303887996969,0cyclictest0-21swapper/123:04:431
1303908996414,25cyclictest3583422-21Compositor20:28:3513
1303908996414,25cyclictest3583422-21Compositor20:28:3513
130327526450,7sleep90-21swapper/919:08:3815
1303920996352,0cyclictest0-21swapper/1020:30:222
1303906996360,3cyclictest0-21swapper/621:49:1112
130390699631,20cyclictest0-21swapper/621:36:0812
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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