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2025-12-21 - 07:32

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #8

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 rackeslot8s.osadl.org (updated Sun Dec 21, 2025 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
38550169911540,1149cyclictest3954037-21sleep20:25:003
38550169910040,998cyclictest3986397-21sleep20:50:013
41844452280,1sleep20-21swapper/223:20:202
385501699198,8cyclictest18856-21turbostat23:45:013
3855016991815,1cyclictest0-21swapper/319:40:003
41035182172,4sleep04103532-21apt-get22:20:130
3855016991714,1cyclictest0-21swapper/323:35:013
3855016991714,1cyclictest0-21swapper/319:15:253
385501699171,13cyclictest4148491-21taskset22:55:013
385501699162,10cyclictest4013154-21taskset21:10:113
3855016991614,1cyclictest0-21swapper/321:34:593
3855016991613,1cyclictest0-21swapper/320:20:003
3855016991613,1cyclictest0-21swapper/300:30:183
41805662151,4sleep24180631-21munin-run23:20:012
3855016991513,0cyclictest0-21swapper/319:59:583
3855016991512,1cyclictest0-21swapper/322:39:463
3855016991512,1cyclictest0-21swapper/320:45:013
385501699151,11cyclictest4051451-21taskset21:40:003
385501699151,11cyclictest3938635-21taskset20:10:203
385501699151,10cyclictest4026030-21taskset21:20:133
385501699141,9cyclictest643492sleep300:20:123
3855016991413,0cyclictest0-21swapper/321:58:373
3855016991412,1cyclictest0-21swapper/323:59:263
3855016991412,1cyclictest0-21swapper/323:46:313
3855016991412,1cyclictest0-21swapper/322:41:083
3855016991412,1cyclictest0-21swapper/320:08:043
3855016991412,1cyclictest0-21swapper/319:52:343
3855016991412,1cyclictest0-21swapper/319:14:563
3855016991412,1cyclictest0-21swapper/300:03:583
3855016991412,0cyclictest0-21swapper/320:29:453
3855016991412,0cyclictest0-21swapper/300:25:203
385501699141,11cyclictest3876644-21taskset19:25:013
3855016991411,1cyclictest0-21swapper/323:29:183
3855016991411,1cyclictest0-21swapper/323:10:423
3855016991411,1cyclictest0-21swapper/323:07:453
3855016991411,1cyclictest0-21swapper/321:29:273
385501699141,10cyclictest4155127-21chrt23:00:013
385501699141,10cyclictest4084222-21taskset22:05:163
385501699141,10cyclictest4057207-21taskset21:40:243
385501699141,10cyclictest3986922-21taskset20:50:113
385501699141,10cyclictest3961065-21taskset20:30:163
385501699141,10cyclictest3902136-21taskset19:41:443
385501699141,10cyclictest3888744-21taskset19:30:253
385501699134,7cyclictest4186825-21taskset23:23:053
385501699134,6cyclictest40970132sleep322:15:153
385501699131,9cyclictest4174415-21taskset23:15:123
385501699131,9cyclictest4154539-21chrt22:55:533
385501699131,9cyclictest4141697-21taskset22:45:583
385501699131,9cyclictest4077335-21chrt22:00:073
385501699131,9cyclictest4012626-21sleep21:10:013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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