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2026-05-30 - 23:00

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 Sat May 30, 2026 12:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
220329280,8sleep00-21swapper/007:07:210
208329165,20sleep20-21swapper/207:05:482
224628366,13sleep10-21swapper/107:07:561
206928269,9sleep30-21swapper/307:05:373
206892740,0sleep20-21swapper/210:22:502
143182730,0sleep2311rcuc/212:34:262
46102430,0sleep00-21swapper/011:30:200
2495992828,0cyclictest0-21swapper/209:43:042
249599230,1cyclictest0-21swapper/212:15:132
249599210,21cyclictest0-21swapper/211:01:562
2490992120,1cyclictest0-21swapper/108:06:341
249099210,0cyclictest0-21swapper/110:15:201
249599200,19cyclictest0-21swapper/210:15:122
249099200,18cyclictest0-21swapper/112:22:331
2497991919,0cyclictest0-21swapper/312:12:263
249599190,1cyclictest0-21swapper/211:22:502
249099190,17cyclictest0-21swapper/108:39:591
249099183,1cyclictest141rcu_preempt10:25:131
2490991813,4cyclictest25-21ksoftirqd/111:20:011
249099180,18cyclictest0-21swapper/111:42:071
248699185,7cyclictest16228-21munin-run10:40:010
249599170,15cyclictest0-21swapper/212:10:442
2490991716,1cyclictest0-21swapper/109:42:131
249099170,8cyclictest0-21swapper/110:08:131
249099170,17cyclictest0-21swapper/110:41:571
249099170,15cyclictest30495-21ssh09:30:211
249099170,15cyclictest30495-21ssh09:30:211
249099170,0cyclictest0-21swapper/110:02:481
2486991717,0cyclictest0-21swapper/012:33:560
2497991613,1cyclictest0-21swapper/311:35:193
2497991612,2cyclictest14485-21apt-get12:15:133
249799160,15cyclictest0-21swapper/310:15:183
249799160,0cyclictest0-21swapper/311:18:523
249599160,16cyclictest0-21swapper/209:31:012
249599160,16cyclictest0-21swapper/209:31:002
249099161,1cyclictest141rcu_preempt11:16:511
249099160,1cyclictest0-21swapper/110:50:011
249099160,16cyclictest0-21swapper/111:02:351
248699160,1cyclictest0-21swapper/010:42:470
167872160,0sleep20-21swapper/211:18:402
249799150,15cyclictest0-21swapper/309:20:023
249599150,15cyclictest0-21swapper/209:48:032
249599150,0cyclictest0-21swapper/211:50:052
2490991513,0cyclictest0-21swapper/111:31:591
2490991512,2cyclictest12977-21sleep09:40:011
248699151,8cyclictest9835-21munin-run07:25:010
2486991513,2cyclictest13-21ksoftirqd/011:59:190
249799148,5cyclictest39-21ksoftirqd/311:26:093
2495991414,0cyclictest0-21swapper/210:51:072
2495991413,1cyclictest55650irq/127-enp2s0-10:04:582
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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