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2026-01-08 - 20:46

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 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 50 highest latencies:
System rack4slot1s.osadl.org (updated Thu Jan 08, 2026 12:44:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2525721100,4sleep30-21swapper/311:25:443
2525721100,4sleep30-21swapper/311:25:443
310422920,1sleep00-21swapper/010:10:480
310422920,1sleep00-21swapper/010:10:480
196682890,4sleep30-21swapper/311:10:453
196682890,4sleep30-21swapper/311:10:453
125272860,3chrt0-21swapper/209:20:292
125272860,3chrt0-21swapper/209:20:292
125272860,3chrt0-21swapper/209:20:292
301972840,3sleep20-21swapper/210:10:382
301972840,3sleep20-21swapper/210:10:382
64332820,3sleep30-21swapper/307:30:513
64332820,3sleep30-21swapper/307:30:513
81842790,1sleep1271rcuc/107:35:471
81842790,1sleep1271rcuc/107:35:471
81842790,1sleep1271rcuc/107:35:471
275602680,2sleep20-21swapper/210:00:452
275602680,2sleep20-21swapper/210:00:452
19242640,2sleep30-21swapper/310:20:403
19242640,2sleep30-21swapper/310:20:403
185132640,2sleep30-21swapper/312:35:393
185132640,2sleep30-21swapper/312:35:393
185132640,2sleep30-21swapper/312:35:393
134942610,3sleep013496-21grep07:50:460
134942610,3sleep013496-21grep07:50:460
37262590,2sleep30-21swapper/307:25:403
37262590,2sleep30-21swapper/307:25:403
93982550,3sleep30-21swapper/307:40:403
93982550,3sleep30-21swapper/307:40:403
302472540,3sleep30-21swapper/310:10:393
302472540,3sleep30-21swapper/310:10:393
252092510,3chrt0-21swapper/209:51:322
252092510,3chrt0-21swapper/209:51:322
180792490,3sleep20-21swapper/211:05:492
180792490,3sleep20-21swapper/211:05:492
60552480,4sleep30-21swapper/310:30:453
60552480,4sleep30-21swapper/310:30:453
161892450,4sleep30-21swapper/311:00:443
21962440,3sleep10-21swapper/108:50:451
161772430,1sleep20-21swapper/209:30:262
255532420,3chrt0-21swapper/309:55:273
255532420,3chrt0-21swapper/309:55:273
266612400,3sleep20-21swapper/211:30:382
221072400,1sleep122134-21forks09:45:371
221072400,1sleep122134-21forks09:45:371
30161993933,4cyclictest572-21cups-browsed11:20:260
30161993933,4cyclictest572-21cups-browsed11:20:260
30161993933,4cyclictest572-21cups-browsed11:20:260
30161993829,7cyclictest18631-21latency_hist08:10:260
30161993829,7cyclictest18631-21latency_hist08:10:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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