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2026-06-05 - 03:23

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 Fri Jun 05, 2026 00:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
24073210087,9sleep00-21swapper/019:07:400
2301429582,8sleep20-21swapper/219:05:182
2394529165,9sleep30-21swapper/319:06:043
2418628669,13sleep10-21swapper/119:09:101
24348992726,1cyclictest0-21swapper/322:30:403
2434899271,1cyclictest141rcu_preempt00:25:363
2434099270,3cyclictest0-21swapper/021:38:160
2434899250,1cyclictest0-21swapper/323:33:413
2434899250,0cyclictest0-21swapper/322:35:103
2434099250,5cyclictest14547-21grep19:55:170
2434099250,5cyclictest14547-21grep19:55:160
2434599240,22cyclictest0-21swapper/221:23:542
24342992422,1cyclictest5262-21gltestperf00:35:191
2434299242,19cyclictest30195-21apt-get22:35:121
2434899230,0cyclictest0-21swapper/321:47:333
2434299230,23cyclictest0-21swapper/121:31:501
2434099235,16cyclictest1-21systemd21:55:270
2434099232,2cyclictest2559-21cron20:40:000
2434099231,1cyclictest141rcu_preempt21:15:350
2434099231,0cyclictest0-21swapper/021:40:390
2434099230,4cyclictest0-21swapper/021:26:020
2434899221,18cyclictest0-21swapper/323:10:133
2434899220,22cyclictest0-21swapper/321:37:383
2434899220,1cyclictest0-21swapper/323:38:333
2434599220,0cyclictest0-21swapper/223:19:342
2434099220,5cyclictest0-21swapper/022:02:280
2434099220,4cyclictest0-21swapper/022:54:120
2434099220,3cyclictest0-21swapper/000:02:200
2434899210,21cyclictest0-21swapper/323:03:123
24342992121,0cyclictest0-21swapper/123:01:091
2434099211,2cyclictest0-21swapper/022:48:460
2434099210,7cyclictest0-21swapper/023:13:490
2434899202,1cyclictest141rcu_preempt22:19:463
2434599201,1cyclictest141rcu_preempt23:11:062
2434599201,1cyclictest141rcu_preempt22:48:302
2434599200,18cyclictest0-21swapper/223:02:562
2434299200,20cyclictest0-21swapper/122:01:061
2434299200,0cyclictest0-21swapper/122:32:201
2434099200,2cyclictest0-21swapper/023:17:160
2434099200,2cyclictest0-21swapper/022:17:250
2434099200,1cyclictest0-21swapper/021:30:390
2434899191,1cyclictest141rcu_preempt00:04:043
2434899190,1cyclictest0-21swapper/321:25:003
2434299190,2cyclictest0-21swapper/122:50:051
2434299190,2cyclictest0-21swapper/100:20:141
2434299190,19cyclictest0-21swapper/100:10:231
2434099193,4cyclictest0-21swapper/021:54:120
2434099193,4cyclictest0-21swapper/021:54:110
2434099190,1cyclictest0-21swapper/021:45:190
2434899183,6cyclictest0-21swapper/300:20:153
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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