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2026-04-23 - 04:56

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 50 highest latencies:
System rack0slot4s.osadl.org (updated Thu Apr 23, 2026 00:46:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
13805442374366,5sleep20-21swapper/219:05:478
13807322366349,10sleep120-21swapper/1219:07:324
13806582363354,6sleep150-21swapper/1519:06:477
13805762359339,13sleep40-21swapper/419:06:0410
13807912358338,13sleep90-21swapper/919:08:1815
13807022358338,13sleep140-21swapper/1419:07:186
13809312356336,13sleep110-21swapper/1119:09:563
13809082355335,13sleep100-21swapper/1019:09:402
13807012352333,12sleep130-21swapper/1319:07:175
13809232351331,13sleep50-21swapper/519:09:5011
13809262350330,13sleep80-21swapper/819:09:5314
13806462350330,13sleep70-21swapper/719:06:3913
13806032348328,13sleep30-21swapper/319:06:199
13806902347327,13sleep60-21swapper/619:07:1012
13808272346326,13sleep10-21swapper/119:08:421
13805992340319,14sleep00-21swapper/019:06:160
138143399413,25cyclictest0-21swapper/1423:15:576
138143399413,25cyclictest0-21swapper/1421:59:056
138143399413,25cyclictest0-21swapper/1420:53:106
138143399402,25cyclictest0-21swapper/1419:47:166
138143399402,25cyclictest0-21swapper/1419:14:196
138143399402,25cyclictest0-21swapper/1400:32:516
138143399391,25cyclictest0-21swapper/1420:31:126
138143399380,25cyclictest0-21swapper/1421:04:096
1381392993733,3cyclictest1504973-21kworker/u32:2+events_unbound21:32:258
138139299355,1cyclictest1558186-21kworker/u32:3+events_unbound22:56:228
138143399340,9cyclictest0-21swapper/1423:48:556
1381394993411,23cyclictest0-21swapper/320:17:189
138143399339,10cyclictest0-21swapper/1423:26:576
1381433993310,10cyclictest1591219-21ssh22:32:016
138142799330,30cyclictest0-21swapper/1223:34:374
138142299330,32cyclictest0-21swapper/1021:56:222
1381414993333,0cyclictest0-21swapper/823:55:4314
1381414993333,0cyclictest0-21swapper/822:20:4314
138140099330,30cyclictest0-21swapper/423:50:1610
138139299331,32cyclictest1720959-21kworker/u32:2+events_unbound00:14:338
138139299330,30cyclictest0-21swapper/223:23:378
138142799320,30cyclictest0-21swapper/1219:35:474
138142799320,30cyclictest0-21swapper/1219:35:474
1381414993232,0cyclictest0-21swapper/823:13:2714
1381414993232,0cyclictest0-21swapper/821:30:0114
1381412993230,1cyclictest1774-21snmpd23:36:0113
138140699320,29cyclictest0-21swapper/520:15:1411
138139299320,30cyclictest1689049-21ssh23:48:278
138139299320,29cyclictest0-21swapper/223:54:478
138139299320,29cyclictest0-21swapper/223:05:238
138139299320,29cyclictest0-21swapper/222:39:158
138139299320,29cyclictest0-21swapper/222:20:138
138139299320,29cyclictest0-21swapper/222:19:548
138139299320,29cyclictest0-21swapper/221:57:298
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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