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2023-01-29 - 10:38

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #8

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 i7-X990 @3470 MHz, Linux 5.10.47-rt46 (Profile)

Latency plot of shadow in rack #0, 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 --smi
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 rack0slot8s.osadl.org (updated Sun Jan 29, 2023 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2998911040,95ptp4l0-21swapper/119:09:191
917801000,95rtkit-daemon0-21swapper/1019:09:152
2560928977,10sleep110-21swapper/1119:07:513
170922670,0sleep80-21swapper/823:50:1710
2567426555,8sleep50-21swapper/519:08:457
196582630,0sleep100-21swapper/1023:50:302
2557726049,9sleep70-21swapper/719:07:229
265382550,0sleep20-21swapper/221:55:234
2566925542,11sleep00-21swapper/019:08:390
2546625544,9sleep60-21swapper/619:05:458
233742550,0sleep00-21swapper/022:35:000
2303225443,8sleep40-21swapper/419:05:196
2612699231,17cyclictest0-21swapper/423:25:006
299891210,0ptp4l0-21swapper/123:20:271
2614299210,1cyclictest0-21swapper/723:50:009
2612699212,15cyclictest0-21swapper/421:25:016
2612699211,7cyclictest0-21swapper/421:35:016
2612299208,6cyclictest0-21swapper/321:35:015
299891190,0ptp4l0-21swapper/122:30:291
2614699193,9cyclictest0-21swapper/819:40:0110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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