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2024-06-18 - 21:47

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

Data to construct the above plot have been generated using the RT test utility cyclictest.

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 rack4slot1s.osadl.org (updated Tue Jun 18, 2024 12:43:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
211612940,3sleep121164-21missed_timers08:03:511
211612940,3sleep121164-21missed_timers08:03:511
106722870,3sleep20-21swapper/210:28:392
278732820,1sleep10-21swapper/112:38:471
23182800,3sleep20-21swapper/207:13:552
23182800,3sleep20-21swapper/207:13:552
98252600,3chrt0-21swapper/307:33:503
98252600,3chrt0-21swapper/307:33:503
27042560,2sleep30-21swapper/307:14:043
27042560,2sleep30-21swapper/307:14:043
164072500,3sleep30-21swapper/312:08:383
164072500,3sleep30-21swapper/312:08:383
236332480,2sleep10-21swapper/108:09:051
208902460,3sleep30-21swapper/310:53:533
208902460,3sleep30-21swapper/310:53:533
259412420,3sleep30-21swapper/312:33:423
259412420,3sleep30-21swapper/312:33:423
1629994136,3cyclictest8454-21wc10:23:301
1629994136,3cyclictest8454-21wc10:23:301
319162400,3sleep30-21swapper/311:23:483
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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