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2026-06-30 - 05:38

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 Tue Jun 30, 2026 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
333329885,9sleep20-21swapper/219:08:322
342429078,8sleep00-21swapper/019:09:420
322128864,13sleep10-21swapper/119:07:061
331728569,10sleep30-21swapper/319:08:213
150022690,0sleep30-21swapper/322:37:533
279612610,0sleep20-21swapper/200:21:342
205492600,0sleep00-21swapper/023:58:320
100762510,0sleep00-21swapper/022:54:410
353299280,27cyclictest0-21swapper/123:24:541
353299250,22cyclictest0-21swapper/121:52:351
353299230,1cyclictest0-21swapper/119:50:161
258732230,0chrt0-21swapper/322:05:273
353899222,11cyclictest1394-21wget22:30:143
353899222,11cyclictest1394-21wget22:30:143
353599220,0cyclictest0-21swapper/219:20:142
353899211,6cyclictest0-21swapper/322:56:403
353899211,19cyclictest20724-21ntpq23:00:203
353599210,21cyclictest0-21swapper/222:08:162
353299211,12cyclictest0-21swapper/120:25:141
353299210,19cyclictest0-21swapper/122:48:111
352899217,7cyclictest27381-21readlink20:00:000
353899200,19cyclictest0-21swapper/320:15:113
353599200,1cyclictest16907-21ntp_states22:00:212
3535991918,1cyclictest0-21swapper/221:27:082
353599190,16cyclictest0-21swapper/223:32:242
353299190,1cyclictest0-21swapper/122:05:171
353299190,19cyclictest0-21swapper/100:25:451
38682180,0sleep30-21swapper/323:48:373
3538991817,1cyclictest0-21swapper/300:14:283
353599180,1cyclictest0-21swapper/219:55:132
353599180,18cyclictest0-21swapper/221:44:352
353599180,16cyclictest0-21swapper/223:41:382
353899170,17cyclictest6866-21kworker/3:000:30:533
353899170,0cyclictest0-21swapper/323:18:123
3535991715,2cyclictest0-21swapper/223:53:492
353599170,16cyclictest0-21swapper/222:45:152
3532991716,1cyclictest17680-21python00:15:211
3532991716,1cyclictest0-21swapper/123:54:451
353299170,16cyclictest0-21swapper/123:41:221
352899173,8cyclictest29714-21awk23:45:000
353899161,15cyclictest22745-21kworker/3:123:08:193
353899160,1cyclictest0-21swapper/321:40:223
353899160,16cyclictest0-21swapper/300:25:033
3535991613,2cyclictest14213-21munin-run20:40:002
3532991616,0cyclictest0-21swapper/121:32:051
352899166,9cyclictest19641-21apache222:41:340
352899160,1cyclictest0-21swapper/023:12:570
353899155,7cyclictest28551-21diskmemload00:17:373
353899150,1cyclictest0-21swapper/323:34:333
353599152,3cyclictest141rcu_preempt23:25:422
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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