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2026-05-04 - 22:38

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #8

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 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 rackbslot8s (updated Mon May 04, 2026 12:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1716082116102,9sleep70-21swapper/707:06:097
1715672116101,10sleep20-21swapper/207:05:332
171640211586,9sleep10-21swapper/107:06:351
1715682115100,10sleep30-21swapper/307:05:343
1717932114100,9sleep50-21swapper/507:08:485
1717742114100,9sleep40-21swapper/407:08:324
171859211398,10sleep60-21swapper/607:09:456
171704211298,9sleep00-21swapper/007:07:310
17212699102100,2cyclictest289806-21kworker/6:010:33:036
17212699102100,2cyclictest289806-21kworker/6:010:33:026
1721219910299,3cyclictest553-21snmpd12:00:515
17211899102100,2cyclictest553-21snmpd11:50:504
172107991020,99cyclictest0-21swapper/110:53:091
172130991010,100cyclictest0-21swapper/710:18:597
172130991010,100cyclictest0-21swapper/709:29:007
1721269910199,2cyclictest256421-21kworker/6:209:46:566
17212699101101,0cyclictest553-21snmpd12:23:516
17212699101100,1cyclictest328708-21kworker/6:112:37:156
17212699101100,1cyclictest328708-21kworker/6:112:31:276
17212699101100,1cyclictest328708-21kworker/6:112:19:086
17212699101100,1cyclictest328708-21kworker/6:112:00:326
17212699101100,1cyclictest328708-21kworker/6:111:55:546
17212699101100,1cyclictest328708-21kworker/6:111:45:136
17212699101100,1cyclictest328708-21kworker/6:111:42:156
17212699101100,1cyclictest328708-21kworker/6:111:25:106
17212699101100,1cyclictest328708-21kworker/6:111:19:436
17212699101100,1cyclictest328708-21kworker/6:111:12:366
17212699101100,1cyclictest328708-21kworker/6:111:05:106
17212699101100,1cyclictest328708-21kworker/6:111:00:026
17212699101100,1cyclictest328708-21kworker/6:110:51:026
17212699101100,1cyclictest328708-21kworker/6:110:48:246
17212699101100,1cyclictest328708-21kworker/6:110:43:566
17212699101100,1cyclictest328708-21kworker/6:110:35:426
17212699101100,1cyclictest289806-21kworker/6:010:25:146
17212699101100,1cyclictest289806-21kworker/6:010:25:146
17212699101100,1cyclictest289806-21kworker/6:010:15:036
17212699101100,1cyclictest289806-21kworker/6:010:10:546
17212699101100,1cyclictest256421-21kworker/6:209:51:496
17212699101100,1cyclictest256421-21kworker/6:209:44:366
17212699101100,1cyclictest224062-21kworker/6:109:33:206
17212699101100,1cyclictest224062-21kworker/6:109:21:096
17212699101100,1cyclictest224062-21kworker/6:109:12:186
17212699101100,1cyclictest224062-21kworker/6:108:55:176
17212699101100,1cyclictest224062-21kworker/6:108:50:096
17212699101100,1cyclictest166931-21kworker/6:107:20:146
172126991010,100cyclictest0-21swapper/607:40:386
1721219910199,2cyclictest553-21snmpd11:02:515
1721219910198,3cyclictest553-21snmpd10:40:175
172121991010,100cyclictest0-21swapper/510:35:565
1721189910199,2cyclictest553-21snmpd07:51:114
1721189910199,1cyclictest605-21lldpd10:43:424
172118991010,100cyclictest0-21swapper/409:02:074
1721139910199,2cyclictest553-21snmpd11:26:373
1721139910199,2cyclictest553-21snmpd09:47:133
1721139910199,1cyclictest553-21snmpd12:19:033
172110991010,100cyclictest0-21swapper/211:20:522
172107991010,101cyclictest0-21swapper/109:49:391
172107991010,101cyclictest0-21swapper/107:37:581
1721029910199,2cyclictest553-21snmpd12:12:180
172102991010,100cyclictest0-21swapper/007:56:560
1721309910099,1cyclictest0-21swapper/708:25:097
172130991000,99cyclictest0-21swapper/712:04:267
172130991000,99cyclictest0-21swapper/710:55:527
172130991000,100cyclictest0-21swapper/712:21:217
172130991000,100cyclictest0-21swapper/711:58:417
172130991000,100cyclictest0-21swapper/709:35:367
172130991000,100cyclictest0-21swapper/708:11:317
172130991000,0cyclictest0-21swapper/710:12:437
1721269910099,1cyclictest328708-21kworker/6:112:26:026
1721269910099,1cyclictest328708-21kworker/6:112:10:176
1721269910099,1cyclictest328708-21kworker/6:112:05:096
1721269910099,1cyclictest328708-21kworker/6:111:50:146
1721269910099,1cyclictest328708-21kworker/6:111:35:466
1721269910099,1cyclictest328708-21kworker/6:111:30:346
1721269910099,1cyclictest328708-21kworker/6:111:20:536
1721269910099,1cyclictest328708-21kworker/6:110:55:396
1721269910099,1cyclictest289806-21kworker/6:010:20:256
1721269910099,1cyclictest289806-21kworker/6:010:00:426
1721269910099,1cyclictest256421-21kworker/6:209:55:116
1721269910099,1cyclictest256421-21kworker/6:209:35:226
1721269910099,1cyclictest224062-21kworker/6:109:25:016
1721269910099,1cyclictest224062-21kworker/6:109:15:276
1721269910099,1cyclictest224062-21kworker/6:109:00:146
1721269910099,1cyclictest177789-21kworker/6:208:40:146
1721269910099,1cyclictest177789-21kworker/6:208:30:116
1721269910099,1cyclictest166931-21kworker/6:108:15:186
1721269910099,1cyclictest166931-21kworker/6:108:00:136
1721269910099,1cyclictest166931-21kworker/6:107:45:086
1721269910099,1cyclictest166931-21kworker/6:107:30:126
1721269910099,1cyclictest166931-21kworker/6:107:25:126
172126991000,99cyclictest0-21swapper/608:35:156
172126991000,100cyclictest0-21swapper/610:05:106
1721219910099,1cyclictest553-21snmpd12:06:185
1721219910099,1cyclictest553-21snmpd09:01:345
1721219910099,1cyclictest553-21snmpd07:18:115
1721219910098,2cyclictest553-21snmpd09:33:125
1721219910098,1cyclictest553-21snmpd09:51:015
1721219910097,3cyclictest553-21snmpd08:04:425
1721219910097,3cyclictest553-21snmpd07:12:325
172121991000,99cyclictest0-21swapper/512:15:155
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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