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2025-09-18 - 17:43

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #3

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.

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 rack7slot3s.osadl.org (updated Thu Sep 18, 2025 12:43:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
242621120,5sleep342999cyclictest07:15:153
897221030,2sleep10-21swapper/110:31:091
310462890,1sleep00-21swapper/011:39:400
42699885,43cyclictest0-21swapper/010:30:280
42699871,40cyclictest28013-21fschecks_time10:55:240
426998624,4cyclictest16270-21grep07:50:310
42699862,32cyclictest0-21swapper/011:55:260
42699852,33cyclictest3519-21fschecks_count11:05:200
426998512,53cyclictest0-21swapper/009:25:160
251722850,5sleep042699cyclictest10:51:010
42699841,8cyclictest6378-21cut08:55:170
42699841,5cyclictest16205-21apt10:00:020
318972840,3sleep231-21ksoftirqd/207:05:302
42699827,37cyclictest21737-1kworker/u9:210:48:370
42699827,37cyclictest21737-1kworker/u9:210:48:370
42699821,42cyclictest29922-21ssh12:17:320
151642820,2sleep015128-21latency_hist12:40:030
42699802,23cyclictest0-21swapper/010:39:590
222142800,1sleep20-21swapper/211:28:192
42699782,7cyclictest1082-21ls09:40:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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