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2026-08-11 - 00:31

OSADL QA Farm on Real-time of Mainline Linux

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

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 50 highest latencies:
System rack7slot7s.osadl.org (updated Mon Aug 10, 2026 12:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
292929963,9sleep00-21swapper/007:09:110
284329774,18sleep20-21swapper/207:08:042
269529466,9sleep30-21swapper/307:06:093
272528566,15sleep10-21swapper/107:06:311
106132750,0sleep00-21swapper/009:18:360
198052540,0sleep00-21swapper/011:00:190
295292280,0sleep30-21swapper/310:46:353
308699260,26cyclictest0-21swapper/212:31:042
3080992523,1cyclictest0-21swapper/011:22:540
308699240,24cyclictest0-21swapper/210:34:202
308999230,22cyclictest21520-21kworker/3:010:06:223
308699230,23cyclictest0-21swapper/210:11:472
3084992219,2cyclictest0-21swapper/111:48:181
308999210,20cyclictest0-21swapper/310:40:523
308499200,3cyclictest0-21swapper/110:04:371
308999190,1cyclictest0-21swapper/309:16:053
308699190,19cyclictest0-21swapper/212:16:262
308699190,17cyclictest0-21swapper/208:45:132
3084991817,1cyclictest0-21swapper/110:13:441
3080991816,2cyclictest0-21swapper/012:27:200
308099180,1cyclictest0-21swapper/011:19:090
308999171,16cyclictest0-21swapper/311:14:593
308699170,17cyclictest0-21swapper/211:18:202
308699170,17cyclictest0-21swapper/210:25:022
308699170,16cyclictest0-21swapper/209:21:582
308499172,14cyclictest28085-21diskmemload12:22:491
308499172,14cyclictest28085-21diskmemload12:22:491
3084991717,0cyclictest0-21swapper/107:10:121
3084991716,1cyclictest0-21swapper/109:13:591
3080991717,0cyclictest0-21swapper/012:00:150
270592170,1sleep30-21swapper/310:25:433
244052170,0sleep30-21swapper/309:26:213
3089991615,1cyclictest21520-21kworker/3:011:21:323
3089991615,1cyclictest0-21swapper/310:18:073
3089991611,3cyclictest28080-21basename09:10:003
308699160,1cyclictest0-21swapper/209:34:032
308699160,16cyclictest0-21swapper/212:20:582
308699160,16cyclictest0-21swapper/212:20:582
308499160,16cyclictest0-21swapper/110:53:041
308099160,16cyclictest0-21swapper/012:16:230
308999152,13cyclictest0-21swapper/311:41:013
308699154,8cyclictest27577-21cups-browsed11:25:212
308699151,1cyclictest0-21swapper/210:21:202
308699150,15cyclictest0-21swapper/211:41:302
308499159,5cyclictest26089-21ls10:25:221
308499157,5cyclictest19491-21perl11:00:161
3084991512,2cyclictest29419-21sed08:05:001
308499151,12cyclictest28085-21diskmemload12:09:061
308499150,15cyclictest0-21swapper/112:30:251
308499150,11cyclictest27599-21kworker/u8:010:41:471
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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