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2026-09-01 - 10:19

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 Tue Sep 01, 2026 00:46:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
39154792403383,13sleep40-21swapper/419:06:1010
39154962368329,13sleep20-21swapper/219:06:248
39155762364356,5sleep10-21swapper/119:07:281
39156532359317,14sleep150-21swapper/1519:08:307
39157642357319,14sleep00-21swapper/019:09:350
39154802353331,13sleep50-21swapper/519:06:1111
39156252352343,6sleep100-21swapper/1019:08:092
39154282352344,5sleep130-21swapper/1319:05:315
39157712351331,13sleep60-21swapper/619:09:4112
39156442350330,13sleep80-21swapper/819:08:2314
39155332348328,12sleep30-21swapper/319:06:579
39154702348324,14sleep120-21swapper/1219:06:024
39154412348328,13sleep90-21swapper/919:05:4315
39156902346327,13sleep70-21swapper/719:08:5413
39156482345323,14sleep110-21swapper/1119:08:263
39154462342322,13sleep140-21swapper/1419:05:486
3916239994745,1cyclictest4007753-21kworker/u32:4+flush-259:021:00:2412
3916239994342,0cyclictest0-21swapper/623:00:1512
3916227994342,1cyclictest4158164-21kworker/u32:0+events_unbound23:05:128
3916227994140,1cyclictest4138222-21kworker/u32:3+flush-259:022:53:028
3916232993837,1cyclictest0-21swapper/322:18:149
3916227993737,0cyclictest4022833-21ssh21:13:068
3916227993737,0cyclictest4022833-21ssh21:13:068
3916264993612,13cyclictest4017378-21diskmemload22:09:016
3916232993636,0cyclictest0-21swapper/300:17:089
3916232993636,0cyclictest0-21swapper/300:17:089
3916232993635,1cyclictest0-21swapper/321:59:389
3916232993635,1cyclictest0-21swapper/321:14:469
3916232993635,1cyclictest0-21swapper/321:14:469
391623299360,28cyclictest0-21swapper/300:00:029
3916227993633,1cyclictest4165174-21kworker/u32:3+events_unbound23:21:088
3916266993534,1cyclictest0-21swapper/1519:10:157
3916255993534,1cyclictest0-21swapper/1122:18:143
3916227993533,2cyclictest0-21swapper/223:30:028
3916227993532,3cyclictest0-21swapper/200:27:528
3916255993434,0cyclictest0-21swapper/1122:31:543
3916255993430,4cyclictest0-21swapper/1122:43:283
3916248993434,0cyclictest0-21swapper/919:44:4615
391623299345,29cyclictest511ktimers/322:56:099
3916227993433,1cyclictest4191388-21kworker/u32:0+events_unbound23:36:468
3916227993433,1cyclictest4140713-21sort22:45:128
3916227993433,1cyclictest4007753-21kworker/u32:4+flush-259:021:47:588
3916227993433,1cyclictest0-21swapper/223:52:188
391622799340,32cyclictest0-21swapper/200:05:028
391622799340,27cyclictest45844-21polkitd00:00:168
3916255993333,0cyclictest0-21swapper/1100:17:093
3916255993333,0cyclictest0-21swapper/1100:17:083
391623999330,30cyclictest0-21swapper/600:05:3512
3916232993333,0cyclictest0-21swapper/321:52:169
3916227993333,0cyclictest0-21swapper/200:11:478
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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