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2025-12-16 - 13:47

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #4

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 rack0slot4s.osadl.org (updated Tue Dec 16, 2025 00:46:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40166332369361,5sleep50-21swapper/519:06:0911
40168462353332,14sleep30-21swapper/319:09:049
40167042352332,13sleep00-21swapper/019:07:090
40166052352332,13sleep130-21swapper/1319:05:455
40168202351343,5sleep110-21swapper/1119:08:403
40167982350331,12sleep80-21swapper/819:08:2114
40166352350329,14sleep70-21swapper/719:06:1213
40169032348328,13sleep150-21swapper/1519:09:497
40166742347327,13sleep60-21swapper/619:06:4212
40166722347329,12sleep40-21swapper/419:06:4010
40165942347326,14sleep20-21swapper/219:05:358
40166612344326,12sleep100-21swapper/1019:06:312
40167262343322,14sleep120-21swapper/1219:07:214
40166522343322,14sleep10-21swapper/119:06:211
40166822340319,14sleep140-21swapper/1419:06:506
40166962339319,13sleep90-21swapper/919:07:0215
4017303994847,1cyclictest0-21swapper/020:35:240
4017327994242,0cyclictest0-21swapper/800:23:5914
4017303994242,0cyclictest0-21swapper/023:33:320
4017303994242,0cyclictest0-21swapper/021:17:160
4017303994242,0cyclictest0-21swapper/000:36:440
4017327994141,0cyclictest0-21swapper/820:35:2414
4017308994141,0cyclictest0-21swapper/221:48:578
4017308994141,0cyclictest0-21swapper/220:35:248
4017303994141,0cyclictest0-21swapper/023:04:550
4017303994141,0cyclictest0-21swapper/021:52:360
4017303994141,0cyclictest0-21swapper/000:17:000
4017303994040,0cyclictest4041571-21kworker/0:0+events21:33:320
4017303994040,0cyclictest0-21swapper/023:42:370
4017303994040,0cyclictest0-21swapper/023:16:210
4017303994040,0cyclictest0-21swapper/022:59:490
4017303994040,0cyclictest0-21swapper/022:46:130
4017303994040,0cyclictest0-21swapper/022:39:560
4017303994040,0cyclictest0-21swapper/021:07:080
4017303994040,0cyclictest0-21swapper/020:41:500
4017303994040,0cyclictest0-21swapper/020:06:040
4017303994040,0cyclictest0-21swapper/019:54:200
4017303994040,0cyclictest0-21swapper/019:47:320
4017303994040,0cyclictest0-21swapper/000:13:260
4017303994040,0cyclictest0-21swapper/000:07:320
4017303994039,0cyclictest0-21swapper/019:13:320
4017327993939,0cyclictest0-21swapper/822:28:0714
4017308993939,0cyclictest0-21swapper/222:28:078
4017303993939,0cyclictest0-21swapper/021:41:480
4017303993939,0cyclictest0-21swapper/021:13:480
4017303993939,0cyclictest0-21swapper/000:02:260
4017308993838,0cyclictest0-21swapper/221:17:408
4017303993838,0cyclictest0-21swapper/022:03:320
4017303993838,0cyclictest0-21swapper/021:45:160
4017303993838,0cyclictest0-21swapper/021:20:440
4017303993838,0cyclictest0-21swapper/019:19:080
4017303993838,0cyclictest0-21swapper/000:31:080
4017303993837,1cyclictest0-21swapper/022:40:090
4017327993737,0cyclictest0-21swapper/820:20:2214
401732499370,33cyclictest4085391-21taskset20:30:0213
4017308993737,0cyclictest0-21swapper/220:20:228
4017303993737,0cyclictest4041571-21kworker/0:0+events22:18:530
4017303993737,0cyclictest0-21swapper/000:26:460
4017327993636,0cyclictest0-21swapper/823:24:2014
4017327993636,0cyclictest0-21swapper/822:55:2614
4017327993635,1cyclictest0-21swapper/823:04:5414
4017308993636,0cyclictest0-21swapper/223:04:548
4017303993636,0cyclictest0-21swapper/021:28:000
4017327993534,1cyclictest0-21swapper/823:10:1214
4017327993534,1cyclictest0-21swapper/823:10:1214
4017327993534,1cyclictest0-21swapper/819:54:2014
4017324993526,5cyclictest765-21systemd-journal21:32:0013
401732499351,29cyclictest4034640-21kworker/u32:1+flush-259:019:42:4513
4017308993535,0cyclictest0-21swapper/221:40:238
4017303993535,0cyclictest4041571-21kworker/0:0+events21:39:560
4017303993535,0cyclictest3985210-21kworker/0:1+events19:34:120
4017303993535,0cyclictest0-21swapper/022:28:530
4017303993535,0cyclictest0-21swapper/021:57:440
401733499340,1cyclictest0-21swapper/1020:20:172
4017327993434,0cyclictest0-21swapper/823:33:3214
4017327993434,0cyclictest0-21swapper/822:15:4514
4017327993434,0cyclictest0-21swapper/821:52:3614
4017327993434,0cyclictest0-21swapper/820:15:1214
4017327993434,0cyclictest0-21swapper/800:13:2714
4017327993433,1cyclictest0-21swapper/819:13:3214
401732499340,30cyclictest0-21swapper/722:23:0013
401732499340,30cyclictest0-21swapper/721:22:0213
4017308993434,0cyclictest3989394-21kworker/2:2-events19:10:238
4017308993434,0cyclictest0-21swapper/223:33:328
4017308993434,0cyclictest0-21swapper/222:59:488
4017308993434,0cyclictest0-21swapper/222:47:008
4017308993434,0cyclictest0-21swapper/221:33:328
4017308993434,0cyclictest0-21swapper/220:08:298
4017303993434,0cyclictest4041571-21kworker/0:0+events23:22:200
4017303993434,0cyclictest0-21swapper/023:35:330
4017303993434,0cyclictest0-21swapper/022:34:280
4017303993434,0cyclictest0-21swapper/020:48:260
4017303993433,1cyclictest3985210-21kworker/0:1+events19:27:000
4017303993433,0cyclictest3985210-21kworker/0:1+events19:35:400
4017348993331,1cyclictest3934304-21kworker/15:2+events20:00:167
4017348993331,1cyclictest3934304-21kworker/15:2+events20:00:167
4017327993333,0cyclictest0-21swapper/822:47:0014
4017327993333,0cyclictest0-21swapper/820:41:5014
4017327993332,1cyclictest0-21swapper/819:19:0814
401731399330,4cyclictest0-21swapper/321:25:169
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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