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2026-01-04 - 17:43

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 Sun Jan 04, 2026 00:45:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18951122251244,4sleep120-21swapper/1219:09:574
18947872251243,5sleep90-21swapper/919:06:1319
18950252244223,13sleep40-21swapper/419:09:0914
18948062244236,5sleep20-21swapper/219:06:2612
18949502239219,13sleep70-21swapper/719:08:1317
18949392239219,13sleep170-21swapper/1719:08:029
18948612238217,13sleep30-21swapper/319:07:0713
18948202235213,14sleep160-21swapper/1619:06:418
18947652235214,13sleep140-21swapper/1419:05:586
18948122234214,12sleep80-21swapper/819:06:3218
18949342233213,13sleep130-21swapper/1319:07:585
18947502232210,14sleep10-21swapper/119:05:451
18951022230210,12sleep50-21swapper/519:09:5015
18951082229221,5sleep100-21swapper/1019:09:552
18950672229209,12sleep60-21swapper/619:09:3216
18948722223204,12sleep110-21swapper/1119:07:163
18948582221202,12sleep00-21swapper/019:07:040
18948232221199,14sleep180-21swapper/1819:06:4210
18949882220199,13sleep150-21swapper/1519:08:417
18917952219200,12sleep190-21swapper/1919:05:0311
194899670,0ntpd0-21swapper/920:00:3019
1895539994814,26cyclictest941irq_work/819:28:5918
1895559994411,26cyclictest1501irq_work/1400:25:586
189551499416,31cyclictest0-21swapper/022:22:390
1895570994020,0cyclictest0-21swapper/1819:19:1410
1895545993811,26cyclictest1121irq_work/1019:45:352
189557599350,35cyclictest0-21swapper/1919:11:4111
1895570993534,1cyclictest1861irq_work/1823:37:5810
189554199357,0cyclictest0-21swapper/919:24:5219
1895541993411,21cyclictest73050usb-storage22:14:1919
189553999345,27cyclictest941irq_work/822:33:5818
189557599334,28cyclictest1951irq_work/1919:25:5911
189556799330,32cyclictest0-21swapper/1722:42:599
189554199330,0cyclictest0-21swapper/900:23:4619
189553699335,27cyclictest851irq_work/700:33:5817
1895536993331,1cyclictest0-21swapper/700:03:5917
189553699330,32cyclictest0-21swapper/700:37:1917
189556199325,26cyclictest0-21swapper/1519:25:007
1895545993231,0cyclictest0-21swapper/1023:27:422
1895541993231,0cyclictest0-21swapper/923:27:4219
189553999320,32cyclictest0-21swapper/820:30:1718
1895529993218,0cyclictest0-21swapper/500:25:3015
189551499328,0cyclictest0-21swapper/019:42:590
1895559993129,1cyclictest0-21swapper/1400:37:196
189553999310,28cyclictest0-21swapper/819:19:0018
1895536993130,1cyclictest0-21swapper/700:15:4317
1895529993118,0cyclictest0-21swapper/500:36:0315
1895529993118,0cyclictest0-21swapper/500:08:5115
189552499310,30cyclictest0-21swapper/322:30:2213
189551999310,0cyclictest0-21swapper/221:04:0412
1895567993028,2cyclictest1653-21NetworkManager00:01:289
1895567993026,4cyclictest0-21swapper/1719:36:009
189556799300,29cyclictest2144737-21kworker/u80:5+i91500:16:589
189556799300,29cyclictest0-21swapper/1719:10:229
1895565993030,0cyclictest0-21swapper/1619:40:248
189556199302,27cyclictest1591irq_work/1519:15:597
1895555993027,2cyclictest73050usb-storage23:26:305
189554199300,30cyclictest0-21swapper/919:26:5319
1895539993025,5cyclictest0-21swapper/819:45:5918
1895539993024,5cyclictest0-21swapper/820:13:5918
1895539993016,0cyclictest0-21swapper/821:35:5818
189553999300,29cyclictest0-21swapper/821:40:5218
189553999300,29cyclictest0-21swapper/800:20:1518
1895536993029,1cyclictest2161468-21ssh00:27:0217
1895536993029,0cyclictest0-21swapper/720:59:0717
1895536993029,0cyclictest0-21swapper/700:10:2417
1895529993018,0cyclictest0-21swapper/500:18:1815
1895529993017,0cyclictest0-21swapper/500:14:2615
189552999300,30cyclictest0-21swapper/500:31:1315
1895526993030,0cyclictest0-21swapper/421:04:0414
1895570992928,1cyclictest1808196-21firefox00:37:1110
189557099290,20cyclictest0-21swapper/1820:48:0310
1895567992925,4cyclictest0-21swapper/1720:38:599
1895567992918,11cyclictest0-21swapper/1721:13:579
189556799290,22cyclictest0-21swapper/1720:29:009
1895561992928,1cyclictest183150irq/150-eno100:09:367
1895561992910,18cyclictest183150irq/150-eno119:54:497
1895559992927,1cyclictest0-21swapper/1400:32:466
189555199293,26cyclictest1321irq_work/1219:58:454
189554599290,0cyclictest0-21swapper/1000:23:452
1895541992926,2cyclictest73050usb-storage20:28:2919
189554199290,28cyclictest0-21swapper/921:44:5819
189553999290,29cyclictest0-21swapper/800:15:2018
189553999290,28cyclictest0-21swapper/820:25:2018
189553999290,28cyclictest0-21swapper/819:10:2118
189553999290,21cyclictest0-21swapper/822:35:1518
189553999290,0cyclictest0-21swapper/800:35:4118
1895536992929,0cyclictest0-21swapper/700:05:2217
1895536992927,1cyclictest0-21swapper/720:43:5917
189552999290,28cyclictest0-21swapper/523:20:0815
1895570992828,0cyclictest0-21swapper/1821:06:3110
1895567992818,10cyclictest0-21swapper/1721:35:089
189556799280,28cyclictest2173810-21ssh00:38:329
189556799280,27cyclictest0-21swapper/1719:46:249
189556799280,18cyclictest0-21swapper/1722:15:199
189556799280,0cyclictest0-21swapper/1723:34:599
1895565992827,1cyclictest1653-21NetworkManager20:42:168
189556599280,27cyclictest0-21swapper/1619:45:358
1895561992828,0cyclictest183150irq/150-eno121:42:457
1895561992827,1cyclictest183150irq/150-eno119:48:147
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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