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2026-07-27 - 16:26

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 Jul 27, 2026 12:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2018929179,8sleep20-21swapper/207:08:002
1797629176,10sleep00-21swapper/007:05:000
2014628364,14sleep10-21swapper/107:07:261
1821928168,9sleep30-21swapper/307:05:123
97112720,0sleep20-21swapper/211:03:252
2043299250,25cyclictest0-21swapper/211:17:452
2043099250,1cyclictest0-21swapper/112:01:191
2043699242,1cyclictest0-21swapper/310:54:303
2043299240,24cyclictest0-21swapper/209:44:472
2043299240,24cyclictest0-21swapper/209:44:472
2043699231,1cyclictest0-21swapper/307:40:143
2043299230,23cyclictest0-21swapper/210:26:412
2043099232,20cyclictest26451-21perf10:35:001
2043099230,4cyclictest0-21swapper/111:29:381
2043099230,4cyclictest0-21swapper/111:29:371
2043099230,2cyclictest0-21swapper/111:19:391
20432992222,0cyclictest0-21swapper/210:02:052
2043299220,22cyclictest0-21swapper/211:50:052
2043099221,1cyclictest0-21swapper/109:13:371
2043099220,1cyclictest0-21swapper/109:15:331
20426992221,1cyclictest0-21swapper/010:38:420
114132220,0sleep10-21swapper/109:46:451
20430992120,1cyclictest0-21swapper/109:51:561
20430992020,0cyclictest0-21swapper/110:42:211
20426992016,1cyclictest0-21swapper/011:10:460
20426992014,2cyclictest0-21swapper/011:24:380
2043699191,2cyclictest0-21swapper/310:34:263
20432991917,1cyclictest32-21ksoftirqd/210:23:082
2043299191,1cyclictest141rcu_preempt09:47:232
2043099190,1cyclictest0-21swapper/110:04:201
20436991813,3cyclictest6133-21idleruntime-cro09:25:003
2043699180,16cyclictest0-21swapper/311:48:553
2043099180,18cyclictest0-21swapper/112:32:071
9002172,3sleep00-21swapper/009:40:250
9002172,3sleep00-21swapper/009:40:240
20436991715,2cyclictest0-21swapper/312:02:053
2043699171,15cyclictest0-21swapper/309:25:133
20432991713,2cyclictest32-21ksoftirqd/210:53:162
2043299170,2cyclictest0-21swapper/212:20:262
2043299170,16cyclictest0-21swapper/212:28:252
20430991711,5cyclictest17476-21ssh12:05:291
2043099170,1cyclictest0-21swapper/111:30:221
2043099170,0cyclictest0-21swapper/111:45:301
2042699170,1cyclictest0-21swapper/010:50:520
2043299160,1cyclictest141rcu_preempt10:58:532
2043099168,7cyclictest3439-21timerandwakeup10:20:241
2043099166,6cyclictest225-21systemd-journal10:55:001
2043099163,5cyclictest1796-21kworker/1:112:10:471
2043099160,1cyclictest0-21swapper/112:20:161
2043099160,16cyclictest0-21swapper/109:59:261
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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