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2026-05-20 - 14:09

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 Wed May 20, 2026 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
370429784,9sleep00-21swapper/019:08:380
368129582,9sleep20-21swapper/219:08:192
370028463,6sleep10-21swapper/119:08:341
179028368,10sleep30-21swapper/319:05:153
92562680,0sleep10-21swapper/122:34:431
112832620,0sleep00-21swapper/000:11:430
389299271,10cyclictest29261-21wget23:25:140
3896992424,0cyclictest0-21swapper/122:38:141
390399236,9cyclictest14033-21dump-pmu-power23:55:003
390199230,23cyclictest0-21swapper/222:49:542
389699230,2cyclictest0-21swapper/123:13:161
390199220,20cyclictest0-21swapper/221:18:202
3896992117,3cyclictest29728-21cat20:00:251
389699211,19cyclictest0-21swapper/120:20:131
389699210,21cyclictest0-21swapper/100:17:141
389699210,1cyclictest0-21swapper/121:14:011
390399200,19cyclictest0-21swapper/323:35:193
390199200,20cyclictest0-21swapper/222:16:552
390199200,20cyclictest0-21swapper/200:19:262
3896992019,1cyclictest0-21swapper/123:46:531
3896992017,2cyclictest13395-21perf19:30:001
389699200,1cyclictest0-21swapper/121:37:161
389299204,15cyclictest28737-21fschecks_count23:05:150
389699190,3cyclictest0-21swapper/122:12:171
389299197,6cyclictest27935-21munin-run20:00:000
3892991916,2cyclictest94-21kswapd021:38:580
3903991814,2cyclictest39-21ksoftirqd/321:53:143
390399180,2cyclictest141rcu_preempt23:20:073
390199180,18cyclictest0-21swapper/221:57:332
390199180,17cyclictest0-21swapper/222:32:462
389699180,0cyclictest0-21swapper/122:23:041
390199175,1cyclictest141rcu_preempt21:34:022
390199170,1cyclictest0-21swapper/223:25:262
390199170,17cyclictest0-21swapper/223:54:302
390199170,16cyclictest0-21swapper/223:47:162
390199162,13cyclictest0-21swapper/222:20:222
390199160,16cyclictest0-21swapper/200:11:022
390199160,16cyclictest0-21swapper/200:07:112
390199160,11cyclictest0-21swapper/222:05:142
3896991612,0cyclictest0-21swapper/121:26:271
389699161,15cyclictest0-21swapper/122:56:431
389699160,15cyclictest0-21swapper/122:42:211
247482160,0sleep00-21swapper/021:25:290
390399159,2cyclictest141rcu_preempt22:03:253
390399158,2cyclictest225-21systemd-journal00:00:013
390399158,2cyclictest225-21systemd-journal00:00:003
3901991515,0cyclictest0-21swapper/220:25:132
3896991514,1cyclictest0-21swapper/122:47:501
389699150,2cyclictest0-21swapper/123:05:281
389699150,15cyclictest0-21swapper/121:15:501
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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