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2026-04-02 - 16:39

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 Thu Apr 02, 2026 00:46:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40948822279272,4sleep180-21swapper/1819:05:5710
40948762260255,3sleep120-21swapper/1219:05:514
40951792254246,5sleep00-21swapper/019:09:400
40948942247239,5sleep90-21swapper/919:06:0819
40952032235214,13sleep160-21swapper/1619:09:568
40951892233213,13sleep80-21swapper/819:09:4818
40951572232213,12sleep60-21swapper/619:09:2616
40950182232212,12sleep170-21swapper/1719:07:379
40951962231211,12sleep140-21swapper/1419:09:546
40948992231225,4sleep130-21swapper/1319:06:115
40948672231212,12sleep40-21swapper/419:05:4214
40950902230211,12sleep110-21swapper/1119:08:313
40950612229215,8sleep100-21swapper/1019:08:102
40950982228209,12sleep190-21swapper/1919:08:3911
40949282228209,12sleep70-21swapper/719:06:2617
40948652228187,12sleep20-21swapper/219:05:4112
40950022226207,12sleep30-21swapper/319:07:2313
40951052223205,11sleep50-21swapper/519:08:4515
40950742222203,12sleep10-21swapper/119:08:211
40948792214195,12sleep150-21swapper/1519:05:547
409556099487,35cyclictest0-21swapper/220:47:0312
409556099487,35cyclictest0-21swapper/220:47:0312
4095603993434,0cyclictest0-21swapper/1400:39:596
4095593993028,1cyclictest186176-21ssh00:39:593
4095588993022,1cyclictest472370-21CPU2
409561399290,28cyclictest0-21swapper/1721:34:079
4095619992828,0cyclictest4060904-21kworker/19:5+events21:34:1011
4095617992828,0cyclictest0-21swapper/1819:55:5910
4095572992828,0cyclictest0-21swapper/620:39:5916
4095617992727,0cyclictest0-21swapper/1821:34:0910
4095603992727,0cyclictest0-21swapper/1421:34:076
4095566992726,1cyclictest0-21swapper/421:34:0814
409555799270,26cyclictest0-21swapper/121:34:101
4095619992626,0cyclictest0-21swapper/1921:23:5911
4095609992626,0cyclictest0-21swapper/1621:34:058
4095579992626,0cyclictest0-21swapper/821:34:0818
4095593992525,0cyclictest0-21swapper/1121:34:043
409558899250,0cyclictest0-21swapper/1019:54:402
4095574992525,0cyclictest0-21swapper/721:34:0817
4095572992525,0cyclictest0-21swapper/621:34:0816
4095560992525,0cyclictest0-21swapper/221:34:0312
4095607992424,0cyclictest0-21swapper/1521:34:117
4095596992424,0cyclictest0-21swapper/1221:34:114
4095584992424,0cyclictest0-21swapper/921:34:0519
4095569992424,0cyclictest0-21swapper/500:39:5915
4095562992424,0cyclictest0-21swapper/321:34:0513
4095557992424,0cyclictest0-21swapper/121:29:021
4095552992424,0cyclictest0-21swapper/000:39:590
409561999231,1cyclictest472371-21CPU11
4095596992322,1cyclictest0-21swapper/1221:28:074
409557999230,23cyclictest0-21swapper/821:25:5918
409557999230,22cyclictest0-21swapper/819:54:5918
4095574992316,6cyclictest0-21swapper/721:29:5917
4095574992315,8cyclictest0-21swapper/719:10:4817
4095566992318,4cyclictest0-21swapper/419:10:4614
4095566992313,8cyclictest0-21swapper/421:29:5914
4095557992323,0cyclictest0-21swapper/121:36:331
409555299230,23cyclictest4094931-21kworker/0:5+mm_percpu_wq21:34:070
4095617992222,0cyclictest0-21swapper/1821:25:5910
409561399220,20cyclictest472371-21CPU9
409560999220,21cyclictest0-21swapper/1621:29:598
409560799220,21cyclictest4018938-21kworker/15:1+i915-unordered19:54:397
4095599992222,0cyclictest0-21swapper/1321:34:095
409559699221,20cyclictest472371-21CPU4
4095588992222,0cyclictest0-21swapper/1021:34:082
4095584992220,1cyclictest472371-21CPU19
4095584992220,1cyclictest472370-21CPU19
409557499220,21cyclictest472370-21CPU17
4095560992213,9cyclictest0-21swapper/219:11:3712
409555299229,10cyclictest472371-21CPU0
409555299223,1cyclictest4094931-21kworker/0:5+pm19:11:380
409561999210,20cyclictest4060904-21kworker/19:5+events19:10:3711
4095617992121,0cyclictest0-21swapper/1821:36:5910
4095617992119,2cyclictest4044302-21kworker/u80:3+i91519:40:5910
409561799210,21cyclictest0-21swapper/1819:11:4210
4095609992119,1cyclictest472370-21CPU8
409560999211,19cyclictest472370-21CPU8
409560399210,0cyclictest0-21swapper/1421:29:036
409559999210,20cyclictest0-21swapper/1321:36:595
4095584992121,0cyclictest0-21swapper/922:00:2819
4095584992121,0cyclictest0-21swapper/921:23:3719
409558499210,20cyclictest472371-21CPU19
4095579992120,1cyclictest2378-21snmpd19:10:5918
409557299210,0cyclictest0-21swapper/620:07:1416
4095569992121,0cyclictest0-21swapper/521:34:0415
4095560992115,4cyclictest0-21swapper/221:29:5912
409561999200,20cyclictest0-21swapper/1922:20:1811
409561999200,20cyclictest0-21swapper/1921:13:5311
409561999200,20cyclictest0-21swapper/1920:15:1611
409561999200,19cyclictest472371-21CPU11
409561999200,0cyclictest0-21swapper/1919:18:5011
409561799200,0cyclictest0-21swapper/1819:53:5110
409561399200,19cyclictest164369-21ssh00:10:579
4095609992020,0cyclictest0-21swapper/1619:11:258
4095607992020,0cyclictest0-21swapper/1521:29:037
4095607992020,0cyclictest0-21swapper/1519:55:597
4095584992020,0cyclictest0-21swapper/922:05:2319
4095584992020,0cyclictest0-21swapper/920:35:1719
4095584992018,1cyclictest472371-21CPU19
4095584992018,1cyclictest472371-21CPU19
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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