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2024-04-26 - 09:00

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, 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 rackcslot4s.osadl.org (updated Fri Apr 26, 2024 00:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4205993311,5cyclictest29944-21cut22:05:010
4205993311,5cyclictest29944-21cut22:05:000
4205993113,5cyclictest6091-21grep00:05:240
4205993111,5cyclictest3670-21seq20:45:120
420599299,5cyclictest31088-21grep22:05:240
420599298,7cyclictest4915-21sort00:05:000
420599289,4cyclictest13704-21cut00:30:160
420599288,5cyclictest16392-21df19:45:140
4205992814,12cyclictest27519-21cpuspeed_turbos23:35:140
4205992813,2cyclictest10767-21latency_hist22:45:010
420599278,5cyclictest28794-21mailstats20:20:210
420599278,4cyclictest6298-21expr22:30:150
420599271,13cyclictest7798-21snmp_o5powerctl20:55:260
420599269,4cyclictest17661-21df23:05:130
420599269,4cyclictest13132-21df19:35:130
420599267,6cyclictest8337-21memory22:35:160
420599267,5cyclictest23811-21cat23:20:300
420599267,17cyclictest0-21swapper/019:40:140
420599261,7cyclictest26384-21df20:15:160
4205992615,9cyclictest9100-21interrupts00:15:150
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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