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2023-01-31 - 05:47

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, 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 i5-1135G7 @2400 MHz, Linux 5.15.21-rt30 (Profile)

Latency plot of shadow in rack #b, 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 rackbslot8s (updated Tue Jan 31, 2023 00:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
35533652124111,8sleep00-21swapper/019:06:120
355386399123122,1cyclictest3098731-21kworker/6:019:16:536
35536072115102,8sleep60-21swapper/619:09:386
3553611211197,9sleep10-21swapper/119:09:411
3553323211196,10sleep30-21swapper/319:05:343
3553567211096,9sleep40-21swapper/419:09:044
3553399211096,9sleep50-21swapper/519:06:415
3553414210793,9sleep20-21swapper/219:06:542
355386399106105,1cyclictest3632809-21kworker/6:221:31:176
3553588210287,10sleep70-21swapper/719:09:237
3553836999387,2cyclictest547-21snmpd21:08:480
3553860999289,3cyclictest547-21snmpd00:04:255
3553840999289,3cyclictest547-21snmpd21:16:031
355383699920,90cyclictest0-21swapper/020:35:140
355383699920,90cyclictest0-21swapper/020:22:270
3553863999190,1cyclictest547-21snmpd22:11:596
3553863999190,1cyclictest3801936-21kworker/6:000:15:176
3553863999190,1cyclictest3734472-21kworker/6:223:54:076
3553863999190,1cyclictest3734472-21kworker/6:223:24:596
3553863999190,1cyclictest3689413-21kworker/6:122:45:276
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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