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2023-01-31 - 04:53

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #8, slot #7

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 Pentium G4400 @3300 MHz, Linux 4.19.37-rt19 (Profile)

Latency plot of shadow in rack #8, 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 rack8slot7s.osadl.org (updated Tue Jan 31, 2023 00:43:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
293552370,0sleep10-21swapper/121:30:181
23672320,1sleep1959599cyclictest20:15:241
9594991919,0cyclictest0-21swapper/019:10:100
959599180,0cyclictest0-21swapper/123:15:251
959499180,10cyclictest2259-21apt-get21:45:180
9594991712,4cyclictest25485-21/usr/sbin/munin21:20:310
959499170,7cyclictest24260-21apt-get22:45:170
959599160,7cyclictest0-21swapper/122:55:181
959599160,6cyclictest0-21swapper/100:20:191
959599160,4cyclictest0-21swapper/120:35:181
959599160,4cyclictest0-21swapper/120:35:181
959499161,9cyclictest30981-21apt-get21:35:170
959499161,8cyclictest19374-21apt-get19:35:170
9594991611,4cyclictest5924-21/usr/sbin/munin21:55:170
959599151,13cyclictest0-21swapper/121:40:171
959499157,6cyclictest4089-21apt-get21:50:150
959499156,8cyclictest18763-21apt-get22:30:190
959499150,7cyclictest26698-21apt-get19:55:160
959499150,10cyclictest27926-21apt-get22:55:190
959599145,4cyclictest1096-21chrt00:36:281
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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