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2026-10-29 - 20:25

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #3

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 rack1slot3s.osadl.org (updated Thu Oct 29, 2026 12:43:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
57799210143,32mali-event-hand0-21swapper/107:11:191
863755995924,21cyclictest920387-21munin-run09:37:470
86375599524,32cyclictest51450weston10:57:460
863755995128,13cyclictest0-21swapper/007:12:480
86375599494,29cyclictest51450weston08:48:460
863755994918,17cyclictest926139-21munin-run09:47:470
863755994918,17cyclictest926139-21munin-run09:47:470
863757994837,5cyclictest0-21swapper/210:37:472
863755994823,13cyclictest975193-21latency_hist11:12:490
863755994725,12cyclictest1113-21lldpd11:23:250
863755994725,12cyclictest1113-21lldpd11:23:250
863755994619,10cyclictest974910-21latency_hist11:12:480
86375599461,26cyclictest923244-21apt-get09:42:470
86375599456,37cyclictest221rcuc/009:22:510
863755994533,8cyclictest882970-21apt08:07:480
863755994528,10cyclictest16-21ksoftirqd/007:17:480
863755994525,6cyclictest943370-21munin-run10:17:480
863755994524,6cyclictest913376-21kworker/u24:4-kvfree_rcu_reclaim10:03:380
863755994524,12cyclictest0-21swapper/011:52:490
86375599451,30cyclictest893581-21cat08:37:480
863758994437,5cyclictest0-21swapper/310:47:473
863757994434,7cyclictest920369-21cron09:37:472
86375599449,12cyclictest51450weston11:00:460
86375599449,12cyclictest51450weston11:00:460
86375599447,35cyclictest221rcuc/011:47:480
86375599447,15cyclictest16-21ksoftirqd/009:26:310
863755994420,10cyclictest863754-21cyclictest12:15:010
57799441,3mali-event-hand0-21swapper/511:14:195
863759994333,7cyclictest895185-21sendmail08:42:474
863759994333,7cyclictest895185-21sendmail08:42:474
863756994333,8cyclictest863754-21cyclictest09:28:101
863756994333,8cyclictest0-21swapper/112:23:491
863755994332,3cyclictest917454-21munin-run09:32:470
86375599432,26cyclictest51450weston10:09:460
86375599431,39cyclictest951448-21ssh10:30:470
86375599431,38cyclictest1003756-21ssh12:02:490
86375599431,32cyclictest0-21swapper/010:02:490
86375599431,32cyclictest0-21swapper/010:02:490
86375599431,26cyclictest905673-21diskmemload12:32:490
86375599431,14cyclictest955141-21ssh10:37:490
86375599431,11cyclictest986391-21cron11:32:470
86375599431,10cyclictest870853-21date07:32:480
863760994222,8cyclictest191rcu_preempt11:12:485
863760994222,8cyclictest191rcu_preempt11:12:485
863759994234,6cyclictest863754-21cyclictest09:27:474
863756994235,5cyclictest550-21in:imuxsock08:02:471
863756994225,13cyclictest878772-21ntp_states07:53:221
863755994228,12cyclictest888058-21systemd-userwor08:23:280
86375599421,31cyclictest0-21swapper/012:07:480
86375599421,15cyclictest905823-21cut09:12:480
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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