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2026-05-15 - 03:34

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 Fri May 15, 2026 00:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1589621270,2chrt15899-21mailstats23:12:500
1589621270,2chrt15899-21mailstats23:12:500
2236621100,3sleep00-21swapper/020:37:440
2236621100,3sleep00-21swapper/020:37:440
53902810,3sleep05391-21grep00:12:390
53902810,3sleep05391-21grep00:12:390
53902810,3sleep05391-21grep00:12:390
53902810,3sleep05391-21grep00:12:390
301132750,3sleep20-21swapper/219:32:382
292302710,2chrt0-21swapper/220:57:362
292302710,2chrt0-21swapper/220:57:362
103942690,2sleep20-21swapper/221:32:422
103942690,2sleep20-21swapper/221:32:422
103942690,2sleep20-21swapper/221:32:422
316712680,3sleep20-21swapper/223:57:302
316712680,3sleep20-21swapper/223:57:302
37872670,3chrt0-21swapper/222:42:362
37872670,3chrt0-21swapper/222:42:362
279462670,4sleep20-21swapper/223:47:292
279462670,4sleep20-21swapper/223:47:292
186852640,1chrt351rcuc/223:22:322
186852640,1chrt351rcuc/223:22:322
168482640,4sleep20-21swapper/220:22:432
168482640,4sleep20-21swapper/220:22:432
35722630,3chrt0-21swapper/219:47:412
35722630,3chrt0-21swapper/219:47:412
20412600,4sleep20-21swapper/221:11:232
20412600,4sleep20-21swapper/221:11:232
169872580,2sleep20-21swapper/223:17:382
104872570,3chrt0-21swapper/300:27:263
104872570,3chrt0-21swapper/300:27:263
44262530,1sleep04427-21fschecks_count21:17:400
44262530,1sleep04427-21fschecks_count21:17:400
108642520,3chrt0-21swapper/000:27:390
108642520,3chrt0-21swapper/000:27:390
108642520,3chrt0-21swapper/000:27:390
269332500,2chrt0-21swapper/323:42:433
269332500,2chrt0-21swapper/323:42:433
136352480,3sleep20-21swapper/223:07:412
136352480,3sleep20-21swapper/223:07:412
136352480,3sleep20-21swapper/223:07:412
107722470,3sleep30-21swapper/320:07:403
107722470,3sleep30-21swapper/320:07:403
187062460,3sleep30-21swapper/320:27:423
187062460,3sleep30-21swapper/320:27:423
41252440,2sleep14128-21unixbench_multi19:47:481
41252440,2sleep14128-21unixbench_multi19:47:481
127032440,4sleep20-21swapper/220:12:382
43432420,2sleep30-21swapper/321:17:403
43432420,2sleep30-21swapper/321:17:403
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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