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2026-08-17 - 03:26

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #7

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 50 highest latencies:
System rack7slot7s.osadl.org (updated Mon Aug 17, 2026 00:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3133029355,34sleep00-21swapper/019:06:000
3145129164,9sleep20-21swapper/219:07:342
3131628567,13sleep10-21swapper/119:05:491
3161228269,9sleep30-21swapper/319:09:403
31730993026,3cyclictest9637-21perf21:40:003
67962280,0sleep20-21swapper/221:18:412
31730992524,1cyclictest0-21swapper/323:52:193
3172699250,22cyclictest0-21swapper/200:06:552
31730992421,2cyclictest32707-21systemd-cgroups00:08:583
3172199240,22cyclictest0-21swapper/119:50:211
31730992321,1cyclictest24318-21diskmemload21:22:503
31730992313,5cyclictest0-21swapper/323:56:333
3172699230,22cyclictest0-21swapper/200:25:352
3172699230,0cyclictest0-21swapper/200:11:162
3171699238,6cyclictest225-21systemd-journal22:00:000
31730992219,2cyclictest24318-21diskmemload21:17:433
31716992222,0cyclictest0-21swapper/022:01:400
3173099214,12cyclictest0-21swapper/319:15:113
31730992119,1cyclictest24318-21diskmemload23:39:063
31730992119,1cyclictest24318-21diskmemload21:30:583
31730992119,1cyclictest0-21swapper/323:03:083
3172699210,4cyclictest0-21swapper/222:04:222
3172699210,18cyclictest0-21swapper/221:47:402
3172199212,17cyclictest0-21swapper/121:48:091
3172199210,1cyclictest0-21swapper/119:25:151
3172199210,1cyclictest0-21swapper/119:25:151
3171699210,21cyclictest0-21swapper/021:37:150
31730992018,1cyclictest24318-21diskmemload23:31:193
31730992016,3cyclictest24318-21diskmemload23:10:163
31730992016,3cyclictest24318-21diskmemload23:10:153
31730992014,5cyclictest0-21swapper/319:20:153
3173099201,18cyclictest0-21swapper/321:46:193
3172699200,17cyclictest0-21swapper/222:39:012
31721992018,1cyclictest0-21swapper/121:40:181
3172199200,3cyclictest0-21swapper/123:10:151
3172199200,3cyclictest0-21swapper/123:10:151
3172199200,20cyclictest0-21swapper/100:12:141
31730991917,1cyclictest3330-21apache_volume00:30:163
31730991917,1cyclictest12250-21sh00:35:173
31730991915,4cyclictest24318-21diskmemload00:20:433
31730991915,1cyclictest24318-21diskmemload23:45:373
31730991914,1cyclictest24318-21diskmemload00:14:463
31730991911,6cyclictest24318-21diskmemload22:45:473
31726991918,1cyclictest0-21swapper/219:10:182
3172699190,19cyclictest0-21swapper/223:32:482
31721991916,2cyclictest25-21ksoftirqd/123:05:251
31716991917,1cyclictest0-21swapper/022:45:300
31730991816,1cyclictest25684-21latency_hist00:05:003
31730991816,1cyclictest24318-21diskmemload23:05:393
31730991816,1cyclictest0-21swapper/320:30:143
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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