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2026-09-06 - 07:09

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #7

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 rack7slot7s.osadl.org (updated Sun Sep 06, 2026 00:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2611129469,9sleep20-21swapper/219:07:092
2632029367,8sleep00-21swapper/019:09:520
2606528370,9sleep30-21swapper/319:06:323
2627628164,13sleep10-21swapper/119:09:161
2641999290,28cyclictest0-21swapper/221:45:212
2642399280,24cyclictest0-21swapper/300:29:203
2641499230,22cyclictest0-21swapper/100:23:281
2641399221,15cyclictest0-21swapper/022:25:130
2641499200,18cyclictest0-21swapper/122:19:131
2641499190,18cyclictest0-21swapper/100:09:121
2641499190,18cyclictest0-21swapper/100:04:061
2641399196,6cyclictest31891-21ssh00:30:000
2641399195,8cyclictest11936-21grep23:39:590
26413991917,1cyclictest13-21ksoftirqd/000:30:180
26423991818,0cyclictest0-21swapper/322:41:363
26423991818,0cyclictest0-21swapper/322:41:363
26419991814,3cyclictest32-21ksoftirqd/222:55:122
2641499180,0cyclictest0-21swapper/123:44:081
2641399186,6cyclictest14329-21awk22:05:000
26413991813,5cyclictest13-21ksoftirqd/000:07:250
2641399180,18cyclictest0-21swapper/022:32:550
2642399170,1cyclictest0-21swapper/321:59:243
2641399175,6cyclictest3563-21awk21:20:000
26419991614,1cyclictest7628-21grep00:15:172
26419991612,3cyclictest3300-21cut23:15:172
2641999161,13cyclictest0-21swapper/200:13:082
2641499169,6cyclictest16154-21tr19:55:141
2641399164,3cyclictest225-21systemd-journal23:07:540
2641399160,2cyclictest0-21swapper/021:10:420
189092160,0chrt0-21swapper/222:26:102
2642399154,1cyclictest141rcu_preempt22:02:493
2641999153,11cyclictest2085-21ssh23:15:002
26419991511,3cyclictest11801-21uniq23:20:172
2641999151,13cyclictest0-21swapper/222:15:562
2641999150,1cyclictest0-21swapper/222:06:352
2641499153,1cyclictest0-21swapper/123:10:271
2641499152,9cyclictest16842-21cron21:05:011
26414991514,1cyclictest19219-21diskmemload21:40:191
26414991513,1cyclictest0-21swapper/123:15:161
2641499151,10cyclictest0-21swapper/121:38:251
2641499150,1cyclictest0-21swapper/122:00:451
2641399154,8cyclictest5427-21cups-browsed22:00:000
26413991513,1cyclictest13-21ksoftirqd/019:35:260
26413991512,2cyclictest13-21ksoftirqd/022:09:590
2642399143,5cyclictest0-21swapper/321:15:013
26423991411,2cyclictest4796-21ssh00:13:583
26423991410,3cyclictest5199-21grep23:35:193
26423991410,2cyclictest4548-21cron21:39:593
26423991410,2cyclictest18231-21wc22:45:213
26423991410,2cyclictest18049-21systemctl19:59:593
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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