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2026-04-24 - 18:06

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #6

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 100 highest latencies:
System rack0slot6s.osadl.org (updated Fri Apr 24, 2026 00:46:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
22317292278271,4sleep60-21swapper/619:09:0216
22317292278271,4sleep60-21swapper/619:09:0216
22317492270263,4sleep20-21swapper/219:09:1912
22317492270263,4sleep20-21swapper/219:09:1912
22315042262255,4sleep90-21swapper/919:05:4519
22315042262255,4sleep90-21swapper/919:05:4519
22317602261254,4sleep70-21swapper/719:09:2317
22317602261254,4sleep70-21swapper/719:09:2317
22317882240233,4sleep30-21swapper/319:09:4013
22317882240233,4sleep30-21swapper/319:09:4013
22318102237218,12sleep170-21swapper/1719:09:549
22318102237218,12sleep170-21swapper/1719:09:539
22316662235215,12sleep80-21swapper/819:08:0518
22316662235215,12sleep80-21swapper/819:08:0418
22315992235216,12sleep100-21swapper/1019:07:062
22315992235216,12sleep100-21swapper/1019:07:062
22316012234214,12sleep120-21swapper/1219:07:084
22316012234214,12sleep120-21swapper/1219:07:074
22315852233213,12sleep190-21swapper/1919:06:5511
22315852233213,12sleep190-21swapper/1919:06:5411
22316842232212,12sleep50-21swapper/519:08:2215
22316842232212,12sleep50-21swapper/519:08:2115
22315772232211,12sleep140-21swapper/1419:06:506
22315772232211,12sleep140-21swapper/1419:06:496
22316622231211,12sleep40-21swapper/419:08:0114
22316622231211,12sleep40-21swapper/419:08:0014
22316542231211,12sleep180-21swapper/1819:07:5510
22316542231211,12sleep180-21swapper/1819:07:5410
22315752231211,12sleep130-21swapper/1319:06:495
22315752231211,12sleep130-21swapper/1319:06:495
22317762230213,10sleep160-21swapper/1619:09:338
22317762230213,10sleep160-21swapper/1619:09:328
22316472230212,11sleep110-21swapper/1119:07:473
22316472230212,11sleep110-21swapper/1119:07:463
22316592229209,13sleep10-21swapper/119:07:581
22316592229209,13sleep10-21swapper/119:07:581
22317022221201,12sleep00-21swapper/019:08:370
22317022221201,12sleep00-21swapper/019:08:370
22316512221201,13sleep150-21swapper/1519:07:527
22316512221201,13sleep150-21swapper/1519:07:517
223217199397,31cyclictest0-21swapper/222:16:2612
2232166993711,25cyclictest311irq_work/119:46:041
223222499330,32cyclictest0-21swapper/1920:15:5911
223220699330,32cyclictest2236110-21basename19:15:005
223220699330,32cyclictest2236110-21basename19:14:595
223221999300,30cyclictest0-21swapper/1719:36:009
2232214993030,0cyclictest0-21swapper/1600:19:598
223216699304,0cyclictest0-21swapper/121:27:061
2232194992928,0cyclictest0-21swapper/1000:19:582
2232190992929,0cyclictest0-21swapper/919:40:0019
2232213992828,0cyclictest0-21swapper/1522:09:597
2232214992727,0cyclictest0-21swapper/1619:32:598
2232190992727,0cyclictest0-21swapper/900:19:5919
2232176992727,0cyclictest0-21swapper/421:29:0014
2232221992626,0cyclictest0-21swapper/1820:15:5910
2232214992626,0cyclictest0-21swapper/1620:14:598
223217399260,15cyclictest0-21swapper/319:12:5913
223217399260,15cyclictest0-21swapper/319:12:5913
2232221992525,0cyclictest0-21swapper/1819:46:0410
2232206992525,0cyclictest0-21swapper/1321:28:005
2232203992525,0cyclictest0-21swapper/1221:27:594
2232194992525,0cyclictest0-21swapper/1019:33:002
2232178992523,1cyclictest0-21swapper/522:09:5915
2232224992424,0cyclictest0-21swapper/1921:42:2711
2232194992424,0cyclictest0-21swapper/1020:15:002
2232190992423,1cyclictest22748381kworker/u80:6+i91521:27:0719
223219099240,24cyclictest0-21swapper/919:50:0019
2232187992424,0cyclictest0-21swapper/821:28:5818
2232176992424,0cyclictest0-21swapper/421:42:5914
2232176992424,0cyclictest0-21swapper/419:35:5914
2232173992424,0cyclictest0-21swapper/321:27:5913
2232163992424,0cyclictest2339600-21kworker/0:0+events21:28:590
2232219992323,0cyclictest0-21swapper/1700:19:599
223221399230,22cyclictest2215251-21kworker/15:3+i915-unordered20:19:597
2232190992323,0cyclictest1031irq_work/921:43:5819
223218799230,22cyclictest0-21swapper/819:27:5818
223217399230,22cyclictest0-21swapper/323:18:5913
2232171992323,0cyclictest0-21swapper/220:15:5912
2232171992323,0cyclictest0-21swapper/219:46:0412
223217199230,22cyclictest2347698-21chronyc21:27:0712
2232166992323,0cyclictest331rcuc/100:07:111
223222499220,21cyclictest2252238-21ntpq19:30:1711
223222499220,1cyclictest0-21swapper/1919:55:1611
223222199220,0cyclictest0-21swapper/1820:26:5910
2232209992218,3cyclictest2348564-21sed21:30:006
223220999220,22cyclictest0-21swapper/1420:15:596
223220999220,22cyclictest0-21swapper/1420:11:596
2232206992211,11cyclictest0-21swapper/1322:03:005
223220699220,22cyclictest2265537-21gmain19:46:015
2232203992222,0cyclictest0-21swapper/1219:47:594
2232203992215,7cyclictest0-21swapper/1200:15:184
2232190992222,0cyclictest0-21swapper/921:15:0019
2232187992211,11cyclictest0-21swapper/819:19:0018
223217699220,22cyclictest0-21swapper/419:52:5914
223217699220,22cyclictest0-21swapper/419:47:0014
223217699220,21cyclictest0-21swapper/422:41:5914
223217399220,21cyclictest0-21swapper/320:11:5913
223217399220,0cyclictest0-21swapper/320:19:5913
2232166992211,11cyclictest0-21swapper/122:58:591
2232224992120,1cyclictest2297454-21ntpq20:25:1911
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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