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2026-06-24 - 14:39

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #3

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 rack0slot3s.osadl.org (updated Wed Jun 24, 2026 00:44:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
28665062270261,6sleep00-21swapper/019:07:330
28661822254231,15sleep60-21swapper/619:05:466
28665752252207,15sleep70-21swapper/719:07:567
28668902249204,16sleep20-21swapper/219:09:442
28640872239197,33sleep10-21swapper/119:05:011
28667992238213,16sleep30-21swapper/319:09:123
28661542236213,15sleep40-21swapper/419:05:354
28662072235211,16sleep50-21swapper/519:05:535
2867354996110,21cyclictest2483101-21soffice.bin20:55:003
286735899488,34cyclictest528-21systemd-journal20:55:004
2867369994624,15cyclictest0-21swapper/621:24:456
2867349994413,30cyclictest0-21swapper/220:55:002
286736999414,15cyclictest0-21swapper/619:23:256
2867358993734,2cyclictest1390-21snmpd22:04:474
286736199360,35cyclictest2672481-21kworker/5:1+mm_percpu_wq23:44:595
286736199360,35cyclictest0-21swapper/519:40:195
286734099360,35cyclictest0-21swapper/023:28:530
286734999354,30cyclictest0-21swapper/221:24:452
2867345993533,1cyclictest2780871-21kworker/1:2+events19:50:111
286736999342,25cyclictest0-21swapper/620:54:596
286734999348,25cyclictest2477517-21glean.dispatche19:10:152
2867345993432,1cyclictest2780871-21kworker/1:2+events00:00:191
2867345993432,1cyclictest1390-21snmpd22:02:171
2867340993432,1cyclictest0-21swapper/022:48:190
286735899334,15cyclictest0-21swapper/419:23:254
2867354993314,18cyclictest528-21systemd-journal19:23:253
2867345993330,3cyclictest2780871-21kworker/1:2+events00:07:171
2867345993330,2cyclictest2780871-21kworker/1:2+events22:05:211
2867354993129,2cyclictest0-21swapper/300:10:173
2867345993129,2cyclictest2780871-21kworker/1:2+events20:00:151
2867369993029,1cyclictest0-21swapper/621:35:336
2867358993029,1cyclictest0-21swapper/421:35:344
2867349993030,0cyclictest2662287-21kworker/2:2+display_unordered19:23:252
2867345993028,1cyclictest2780871-21kworker/1:2+events23:44:581
2867345993028,1cyclictest2780871-21kworker/1:2+events19:40:181
2867340993015,1cyclictest0-21swapper/020:54:590
286734999290,25cyclictest0-21swapper/223:54:322
286737599280,28cyclictest0-21swapper/721:19:197
286734999280,0cyclictest0-21swapper/219:40:142
2867345992825,2cyclictest2780871-21kworker/1:2+events00:32:251
2867361992725,1cyclictest0-21swapper/520:56:185
2867361992721,1cyclictest171rcu_preempt20:52:515
2867354992721,5cyclictest1390-21snmpd20:34:443
286734999270,25cyclictest0-21swapper/221:34:282
2867340992722,4cyclictest1390-21snmpd20:46:260
286734099270,25cyclictest0-21swapper/022:05:150
286737599260,24cyclictest0-21swapper/722:55:307
286736999260,7cyclictest0-21swapper/620:55:006
286736999260,22cyclictest0-21swapper/623:30:146
286736199262,23cyclictest2480826-21Timer21:49:335
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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