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2026-09-08 - 11:58

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 Tue Sep 08, 2026 00:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
247421550,5sleep12470-21sendmail23:24:111
247421550,5sleep12470-21sendmail23:24:111
2587621460,1chrt0-21swapper/000:24:280
1077221040,1chrt10773-21/usr/sbin/munin20:49:341
251362970,3sleep00-21swapper/022:54:390
251362970,3sleep00-21swapper/022:54:390
12632880,4sleep11266-21grep20:24:331
190382740,3sleep0171ktimers/000:04:460
279292670,2chrt27933-21switchtime20:09:341
279292670,2chrt27933-21switchtime20:09:341
186512610,2chrt0-21swapper/222:39:252
186512610,2chrt0-21swapper/222:39:252
76232600,2sleep07726-21df20:44:230
191852580,2chrt19190-21gltestperf21:14:250
191852580,2chrt19190-21gltestperf21:14:250
157772580,3chrt0-21swapper/223:59:172
275832520,1sleep00-21swapper/020:09:290
275832520,1sleep00-21swapper/020:09:290
301922510,3sleep30-21swapper/321:44:233
301922510,3sleep30-21swapper/321:44:233
68612500,3chrt0-21swapper/223:34:252
83332490,19sleep08436-21df_inode23:39:220
83332490,19sleep08436-21df_inode23:39:220
83332490,19sleep08436-21df_inode23:39:220
137082470,3sleep30-21swapper/320:59:243
137082470,3sleep30-21swapper/320:59:243
56582450,3chrt0-21swapper/222:04:242
56582450,3chrt0-21swapper/222:04:242
237482410,3sleep20-21swapper/221:24:362
237482410,3sleep20-21swapper/221:24:362
184112410,2sleep30-21swapper/300:04:293
148552410,4sleep30-21swapper/323:54:373
6594994032,6cyclictest29487-21netstat20:14:290
6594994032,6cyclictest29487-21netstat20:14:290
312112400,3sleep20-21swapper/220:19:282
312112400,3sleep20-21swapper/220:19:282
93002380,7chrt9304-21gltestperf22:14:270
93002380,7chrt9304-21gltestperf22:14:270
660099371,27cyclictest17618-21chrt00:04:173
660099371,27cyclictest17618-21chrt00:04:173
660099371,27cyclictest17618-21chrt00:04:173
659999371,33cyclictest0-21swapper/200:28:252
288012370,3sleep30-21swapper/320:14:233
288012370,3sleep30-21swapper/320:14:233
194082370,3sleep20-21swapper/219:49:162
659999351,27cyclictest0-21swapper/223:52:062
100002350,2sleep30-21swapper/323:44:113
100002350,2sleep30-21swapper/323:44:113
100002350,2sleep30-21swapper/323:44:113
659999341,24cyclictest18504-21chrt00:04:322
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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