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2026-09-08 - 09:21

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, 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 rack0slot3s.osadl.org (updated Tue Sep 08, 2026 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
24503222290282,5sleep50-21swapper/518:54:405
24478722256191,16sleep40-21swapper/418:53:234
24505602255232,15sleep60-21swapper/618:58:026
24505042251210,18sleep10-21swapper/118:57:141
24505572244217,17sleep30-21swapper/318:57:583
24505342244217,17sleep70-21swapper/718:57:387
24503972244232,8sleep20-21swapper/218:55:442
24503622243231,8sleep00-21swapper/018:55:160
258466621220,0sleep20-21swapper/223:07:022
2450941993431,2cyclictest1390-21snmpd22:18:347
245093099330,33cyclictest0-21swapper/400:14:354
2450937993130,1cyclictest0-21swapper/619:40:146
2450925993129,1cyclictest0-21swapper/300:27:503
2450921993130,1cyclictest0-21swapper/219:40:142
2450937993028,1cyclictest1390-21snmpd20:39:426
2450921993028,1cyclictest0-21swapper/220:39:432
2450941992928,1cyclictest0-21swapper/722:20:317
2450930992814,14cyclictest0-21swapper/421:11:554
2450912992827,1cyclictest0-21swapper/021:35:370
245094199270,27cyclictest0-21swapper/720:24:487
2450925992725,1cyclictest0-21swapper/319:40:143
245092599270,26cyclictest0-21swapper/322:05:433
2450912992726,1cyclictest0-21swapper/020:59:000
2450937992624,1cyclictest0-21swapper/619:22:566
2450937992624,1cyclictest0-21swapper/619:22:556
245093099264,22cyclictest1907017-21gnome-shell00:23:164
2450930992624,2cyclictest1390-21snmpd23:18:124
2450930992624,2cyclictest0-21swapper/423:48:444
245093099260,22cyclictest0-21swapper/422:36:004
2450921992624,1cyclictest1390-21snmpd19:22:562
2450921992624,1cyclictest1390-21snmpd19:22:562
245092199260,25cyclictest2489215-21ntp_states20:06:102
2450916992625,1cyclictest0-21swapper/100:34:421
245091299260,22cyclictest0-21swapper/020:31:540
245094199250,25cyclictest0-21swapper/719:00:377
2450933992521,3cyclictest1390-21snmpd20:52:425
2450933992521,3cyclictest1390-21snmpd00:15:005
245093099250,24cyclictest0-21swapper/421:19:264
2450925992522,2cyclictest1390-21snmpd00:19:433
2450925992521,3cyclictest1390-21snmpd23:21:433
2450925992518,3cyclictest0-21swapper/320:27:053
2450921992521,3cyclictest1390-21snmpd22:39:242
245092199250,24cyclictest0-21swapper/222:17:052
2450916992521,3cyclictest2590699-21cat23:17:221
2450912992521,3cyclictest1390-21snmpd20:27:390
2450912992521,3cyclictest1390-21snmpd19:07:340
2450912992518,5cyclictest0-21swapper/022:53:180
2450912992518,3cyclictest0-21swapper/020:42:210
2450941992420,3cyclictest1390-21snmpd20:19:487
245094199241,22cyclictest0-21swapper/700:04:277
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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