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2025-04-29 - 13:26

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #4

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 here to display the system's profile data or here to proceed to next system.
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.
Unexpectedly long latencies may be caused by SMIs
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 rack9slot4s (updated Tue Apr 29, 2025 00:59:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
323109912271192,24cyclictest0-21swapper/019:25:090
323119911781152,22cyclictest10625-21perl19:50:171
323119910901079,7cyclictest32475-21aten_r4power_cu19:25:111
320212577531,31sleep00-21swapper/019:22:320
320632564518,32sleep10-21swapper/119:23:001
32310999788,6cyclictest0-21swapper/019:50:170
163222820,3sleep00-21swapper/020:05:190
32310997611,33cyclictest12948-21switchtime23:10:230
32310997413,28cyclictest15158-21seq23:16:370
3231099719,30cyclictest983-21latency_hist22:35:000
3231099701,35cyclictest12638-21cat00:54:550
3231099691,5cyclictest23430-21chrt23:42:450
3231099691,44cyclictest12689-21taskset21:29:300
3231099681,6cyclictest15496-21seq20:03:480
32310996815,38cyclictest25030-21iostat_ios23:50:160
3231099671,6cyclictest26552-21chrt20:31:340
3231099641,43cyclictest30984-21df00:10:100
3231099632,6cyclictest18072-21cut20:10:230
32310996311,38cyclictest25741-21fschecks_count22:10:120
3231099621,40cyclictest6769-21fschecks_count19:40:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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