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2023-01-31 - 05:07

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #6

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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x86 Intel Core i9-10900K @3700 MHz, Linux 6.1.0-rc7-rt5 (Profile)

Latency plot of shadow in rack #0, slot #6
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 rack0slot6s.osadl.org (updated Tue Jan 31, 2023 00:45:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1663956991138,48cyclictest0-21swapper/222:47:3212
17105432770,0sleep190-21swapper/1920:02:1511
166314927555,1sleep130-21swapper/1319:05:455
166314927555,1sleep130-21swapper/1319:05:455
4996720740,35pipewire-pulse0-21swapper/1919:05:4411
4996720740,35pipewire-pulse0-21swapper/1919:05:4411
4992120740,72pipewire0-21swapper/1719:06:319
4992120740,72pipewire0-21swapper/1719:06:309
17690722740,0sleep10-21swapper/121:12:031
4992120720,71pipewire0-21swapper/019:09:520
4992120720,71pipewire0-21swapper/019:09:520
17524702700,0sleep160-21swapper/1620:53:368
4992120640,63pipewire0-21swapper/1019:09:452
4992120640,63pipewire0-21swapper/1019:09:452
4992120610,60pipewire0-21swapper/719:06:0117
4992120610,60pipewire0-21swapper/719:06:0117
4992120610,60pipewire0-21swapper/619:05:1916
4992120610,60pipewire0-21swapper/619:05:1916
16772512610,0sleep50-21swapper/519:24:3815
4992120600,59pipewire0-21swapper/1819:08:4810
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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