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2024-06-25 - 14:54

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, 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 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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  Intel
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack1slot6s.osadl.org (updated Tue Jun 25, 2024 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2098421120,7sleep120990-21needreboot09:47:251
2992998831,49cyclictest15591-21latency_hist07:31:503
2992998529,36cyclictest0-21swapper/307:28:203
2992998229,45cyclictest0-21swapper/309:06:443
2992998227,35cyclictest0-21swapper/310:47:093
2992998139,33cyclictest21580-21fschecks_count07:42:133
2992998032,32cyclictest29502-21turbostat.cron10:06:423
2992998032,32cyclictest29502-21turbostat.cron10:06:423
2992997923,49cyclictest0-21swapper/307:40:193
2992997919,39cyclictest0-21swapper/310:57:183
2992997838,34cyclictest23772-21cpuspeed_turbos07:47:033
2992997834,36cyclictest22511-21sort10:56:413
2992997734,26cyclictest6141-21idleruntime-cro08:16:463
2992997729,29cyclictest0-21swapper/308:26:463
2992997726,33cyclictest0-21swapper/309:36:273
2992997725,44cyclictest0-21swapper/310:16:343
2992997725,44cyclictest0-21swapper/308:42:393
299199775,48cyclictest0-21swapper/211:56:382
244399770,4rtkit-daemon2442-21rtkit-daemon07:34:162
2992997632,38cyclictest0-21swapper/309:51:233
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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