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2026-03-18 - 17:39

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 Wed Mar 18, 2026 00:46:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9907622232212,12sleep180-21swapper/1819:06:1210
9915172229209,12sleep60-21swapper/619:09:2016
9910552228209,12sleep00-21swapper/019:07:140
9906402221201,12sleep170-21swapper/1719:05:319
9911592220213,4sleep100-21swapper/1019:08:042
9876222219208,7sleep140-21swapper/1419:05:066
9906332218199,12sleep160-21swapper/1619:05:298
9906542211191,12sleep80-21swapper/819:05:4218
9910772210191,12sleep120-21swapper/1219:07:264
9908652209193,10sleep110-21swapper/1119:06:253
9906802209189,12sleep190-21swapper/1919:05:5311
9911242205196,6sleep130-21swapper/1319:07:475
9867732199189,6sleep70-21swapper/719:04:5917
9910932196177,12sleep10-21swapper/119:07:351
9906312189171,11sleep150-21swapper/1519:05:287
99106127455,12sleep50-21swapper/519:07:1915
99107027341,12sleep90-21swapper/919:07:2319
99135826640,18sleep30-21swapper/319:08:3713
99077426647,13sleep40-21swapper/419:06:1814
992370996018,0cyclictest0-21swapper/1521:56:537
992324995636,0cyclictest0-21swapper/123:55:141
992334995538,14cyclictest7505-21CPU14
992370995421,33cyclictest0-21swapper/1519:55:337
992370995421,33cyclictest0-21swapper/1519:55:337
992370995421,32cyclictest0-21swapper/1522:15:177
992334995432,0cyclictest0-21swapper/419:47:2814
992331995351,1cyclictest0-21swapper/319:15:0713
992370995219,32cyclictest0-21swapper/1520:10:517
992353995228,23cyclictest0-21swapper/1020:46:482
992334995219,0cyclictest0-21swapper/423:12:4314
992334995219,0cyclictest0-21swapper/423:12:4214
992373995129,1cyclictest0-21swapper/1620:37:398
992370995121,29cyclictest0-21swapper/1522:10:147
992370995113,34cyclictest126115450ssh00:09:187
992363995140,9cyclictest7504-21CPU5
992358995116,33cyclictest0-21swapper/1123:25:373
992351995125,25cyclictest107-21ksoftirqd/922:56:4919
99068925137,8sleep20-21swapper/219:05:5612
992373995025,3cyclictest172-21ksoftirqd/1621:13:318
99237099500,15cyclictest0-21swapper/1519:12:167
99236399507,1cyclictest0-21swapper/1323:35:235
99235899505,43cyclictest0-21swapper/1123:22:563
992351995050,0cyclictest410063-21cosmic-comp22:30:5519
992334995027,2cyclictest0-21swapper/422:15:2814
992334995017,32cyclictest611ktimers/400:15:4014
992370994918,30cyclictest1591irq_work/1520:47:117
992370994916,1cyclictest410445-21surface-HDMI-A-20:15:137
992331994938,8cyclictest7505-21CPU13
992373994819,28cyclictest0-21swapper/1619:26:088
992351994847,1cyclictest0-21swapper/921:21:3919
992344994846,1cyclictest0-21swapper/720:33:4517
992334994818,0cyclictest0-21swapper/400:08:2814
992358994725,2cyclictest419431-21firefox19:17:253
992381994613,29cyclictest617961-21virt-manager19:43:1711
992373994646,0cyclictest0-21swapper/1619:16:398
992373994631,15cyclictest0-21swapper/1621:06:358
992373994631,13cyclictest7505-21CPU8
992358994624,21cyclictest0-21swapper/1122:22:113
992351994646,0cyclictest0-21swapper/921:30:1719
992344994644,1cyclictest0-21swapper/723:12:4417
992344994644,1cyclictest0-21swapper/723:12:4417
992324994627,16cyclictest472371-21CPU1
992324994625,1cyclictest410445-21surface-HDMI-A-22:28:391
992370994521,4cyclictest0-21swapper/1521:15:267
992370994520,25cyclictest0-21swapper/1522:02:037
992370994516,0cyclictest0-21swapper/1522:57:087
992363994530,12cyclictest472371-21CPU5
992358994525,14cyclictest0-21swapper/1121:31:023
992358994524,15cyclictest7505-21CPU3
992358994523,22cyclictest0-21swapper/1122:05:223
992358994523,1cyclictest0-21swapper/1122:34:443
992351994544,0cyclictest0-21swapper/921:40:1519
992351994544,0cyclictest0-21swapper/920:49:1319
992351994533,10cyclictest7504-21CPU19
992351994520,23cyclictest107-21ksoftirqd/922:08:2019
992342994515,29cyclictest1261797-21kworker/u80:1+i91500:34:1316
992331994532,12cyclictest7504-21CPU13
992381994415,29cyclictest1951irq_work/1919:38:3611
99237399440,34cyclictest0-21swapper/1600:20:548
992370994419,25cyclictest0-21swapper/1519:48:337
992366994411,27cyclictest0-21swapper/1423:53:176
992363994425,17cyclictest7505-21CPU5
992363994414,29cyclictest1029593-21kworker/u80:5+i91520:38:515
992351994444,0cyclictest0-21swapper/920:43:1719
992351994443,0cyclictest0-21swapper/922:36:2719
992351994442,1cyclictest0-21swapper/922:29:3719
992351994441,1cyclictest0-21swapper/900:20:1519
992348994414,29cyclictest10193831kworker/u80:2+i91520:39:0218
992342994413,28cyclictest1122920-21kworker/u80:7+i91522:11:1916
992334994414,30cyclictest0-21swapper/420:35:5914
992331994420,2cyclictest0-21swapper/321:28:0113
992324994416,27cyclictest0-21swapper/123:31:281
992379994314,28cyclictest1861irq_work/1819:11:2210
992375994315,27cyclictest1771irq_work/1700:20:139
992373994321,22cyclictest0-21swapper/1622:46:178
992373994321,0cyclictest0-21swapper/1619:43:108
992363994324,15cyclictest472371-21CPU5
992363994321,1cyclictest0-21swapper/1321:28:015
992360994313,26cyclictest12172791kworker/u80:2+i91500:17:104
992358994320,22cyclictest1231irq_work/1123:46:043
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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