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2025-11-15 - 17:25

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #5

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 rackeslot5s.osadl.org (updated Sat Nov 15, 2025 12:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3990992725,1cyclictest34-21ksoftirqd/312:15:003
399099240,23cyclictest0-21swapper/309:01:353
398499240,23cyclictest0-21swapper/209:01:352
398499240,1cyclictest11588-21apt-get10:46:352
398099240,23cyclictest21530-21awk10:00:001
3990992321,1cyclictest313-21systemd-journal10:32:223
3990992321,1cyclictest29721-21awk12:29:593
399099230,23cyclictest0-21swapper/309:56:353
398499230,1cyclictest30805-21idleruntime-cro11:25:002
398099230,22cyclictest313-21systemd-journal12:14:591
398099230,1cyclictest3539-21apt-get10:30:001
3976992322,0cyclictest0-21swapper/010:06:330
3976992320,2cyclictest25025-21idleruntime-cro09:00:000
397699230,22cyclictest0-21swapper/008:01:350
3990992220,1cyclictest8810-21sendmail-msp07:20:003
3990992220,1cyclictest22251-21apt-get08:55:003
3990992220,1cyclictest0-21swapper/308:54:593
399099220,21cyclictest8166-21apt-get08:26:353
399099220,21cyclictest0-21swapper/311:21:363
399099220,21cyclictest0-21swapper/310:16:353
399099220,1cyclictest8106-21munin-run11:44:593
3984992220,1cyclictest8814-21basename07:20:002
3984992220,1cyclictest22255-21perf08:55:002
3984992219,2cyclictest22861-21apt-get08:55:012
398499220,21cyclictest23939-21latency_hist10:05:002
398499220,21cyclictest0-21swapper/210:16:352
3980992222,0cyclictest0-21swapper/108:01:351
3980992220,1cyclictest30811-21idleruntime-cro11:24:591
3980992220,1cyclictest20090-21turbostat.cron12:10:001
3980992220,1cyclictest0-21swapper/110:15:011
398099220,21cyclictest9894-21apt-get09:36:361
398099220,21cyclictest25436-21apt-get09:01:351
398099220,21cyclictest0-21swapper/110:41:341
398099220,21cyclictest0-21swapper/109:46:371
398099220,21cyclictest0-21swapper/108:55:011
398099220,21cyclictest0-21swapper/108:11:361
398099220,21cyclictest0-21swapper/107:16:341
398099220,1cyclictest6772-21apt-get10:36:361
398099220,1cyclictest11198-21latency_hist07:25:001
3976992221,1cyclictest0-21swapper/010:41:340
3976992220,2cyclictest598-21rs:main0
397699220,21cyclictest8095-21cat11:45:000
397699220,21cyclictest4314-21apt-get07:11:340
397699220,21cyclictest0-21swapper/012:36:340
397699220,21cyclictest0-21swapper/010:01:340
397699220,21cyclictest0-21swapper/009:11:340
397699220,21cyclictest0-21swapper/009:06:340
397699220,1cyclictest3225-21grep11:35:000
397699220,1cyclictest31110-21cron10:20:000
397699220,1cyclictest0-21swapper/007:46:330
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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