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2026-08-22 - 03:52

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #6

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
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack3slot6s.osadl.org (updated Sat Aug 22, 2026 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16755210998,6sleep30-21swapper/319:07:363
16844210695,6sleep00-21swapper/019:08:440
16846210284,12sleep20-21swapper/219:08:472
16240210181,12sleep10-21swapper/119:06:021
197542930,1sleep20-21swapper/219:15:142
10372800,1sleep10-21swapper/122:15:191
73832730,0sleep10-21swapper/122:21:281
73832730,0sleep10-21swapper/122:21:271
291152730,0sleep20-21swapper/221:38:202
125122680,1sleep337-21rcuc/322:26:503
166362670,0sleep20-21swapper/223:37:372
108632660,0sleep00-21swapper/000:37:440
16973992320,2cyclictest335-21kworker/u8:000:27:043
304732220,1sleep00-21swapper/019:41:000
1697099221,2cyclictest0-21swapper/023:35:120
16973992118,2cyclictest20683-21kworker/u8:223:46:053
1697299211,18cyclictest0-21swapper/221:25:112
16973992017,2cyclictest2147-21kworker/u8:200:00:043
1697299200,18cyclictest0-21swapper/222:25:102
16973991916,2cyclictest7070-21kworker/u8:221:49:053
16973991916,2cyclictest13374-21kworker/u8:000:09:053
16970991916,2cyclictest20683-21kworker/u8:223:43:040
16973991815,2cyclictest2691-21kworker/u8:023:52:043
16973991815,2cyclictest21201-21kworker/u8:021:27:043
16970991815,2cyclictest7861-21kworker/u8:100:08:040
16970991714,2cyclictest7070-21kworker/u8:221:53:050
16970991714,2cyclictest20569-21kworker/u8:200:29:050
1697099170,2cyclictest0-21swapper/022:07:040
16973991613,2cyclictest32491-21kworker/u8:022:49:053
16973991613,2cyclictest27138-21kworker/u8:122:58:023
16973991613,2cyclictest21201-21kworker/u8:021:20:053
1697399161,13cyclictest9368-21ssh22:24:313
1697399161,13cyclictest9368-21ssh22:24:313
1697399160,2cyclictest0-21swapper/322:07:043
16972991611,3cyclictest26384-21ssh00:20:182
1697199164,11cyclictest207150irq/24-eth123:55:221
1697199163,2cyclictest0-21swapper/122:46:161
1697199160,2cyclictest2-21kthreadd22:07:041
1697199160,2cyclictest0-21swapper/100:27:051
16970991613,2cyclictest7861-21kworker/u8:100:14:050
16970991613,2cyclictest7861-21kworker/u8:100:04:060
16970991613,2cyclictest25417-21kworker/u8:022:19:050
16970991613,2cyclictest20569-21kworker/u8:200:16:050
16970991612,2cyclictest5099-21apt-get20:00:110
1697099161,13cyclictest627-21diskmemload22:34:480
1697099160,11cyclictest0-21swapper/021:26:050
16973991512,2cyclictest7861-21kworker/u8:100:12:053
16973991512,2cyclictest32579-21kworker/u8:122:34:053
16973991512,2cyclictest2691-21kworker/u8:023:55:053
16973991512,2cyclictest2691-21kworker/u8:023:39:043
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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