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2025-12-12 - 11:55

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #4

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 rack0slot4s.osadl.org (updated Fri Dec 12, 2025 00:46:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
8838512386380,4sleep70-21swapper/719:05:4713
8840122367325,34sleep110-21swapper/1119:07:593
8839122367326,14sleep90-21swapper/919:06:3815
8839032357321,29sleep60-21swapper/619:06:3412
8841492353335,12sleep130-21swapper/1319:09:545
8841092349325,14sleep150-21swapper/1519:09:247
8840742349328,14sleep140-21swapper/1419:08:516
8839472349329,13sleep100-21swapper/1019:07:102
8838452349328,13sleep10-21swapper/119:05:401
8838632348328,13sleep20-21swapper/219:05:588
8840992347326,13sleep50-21swapper/519:09:1411
8839322345324,13sleep120-21swapper/1219:06:574
8839882343323,13sleep40-21swapper/419:07:3610
8839872343321,14sleep30-21swapper/319:07:359
8838862341323,12sleep80-21swapper/819:06:2014
8840602340320,13sleep00-21swapper/019:08:370
88457299127124,2cyclictest931111-21kworker/u32:3+flush-259:020:10:180
884577994442,2cyclictest1105871-21kworker/u32:2+events_unbound00:07:201
88461099353,32cyclictest1043180-21kworker/u32:4+flush-259:023:01:554
884602993430,2cyclictest0-21swapper/920:15:1815
88461399330,30cyclictest0-21swapper/1321:50:185
884610993329,2cyclictest1134115-21sed00:05:264
88461099330,30cyclictest1008985-21ntp_states21:35:194
884602993333,0cyclictest0-21swapper/923:31:2515
884602993333,0cyclictest0-21swapper/920:10:2515
884602993332,1cyclictest875691-21kworker/u32:4+events_unbound19:10:2315
88458699330,30cyclictest0-21swapper/423:20:1910
88457799330,33cyclictest0-21swapper/122:14:371
88457799330,33cyclictest0-21swapper/119:45:141
884610993227,3cyclictest858862-21kworker/u32:3+flush-259:019:23:354
88461099320,29cyclictest0-21swapper/1221:10:254
88460499320,31cyclictest1228-21in:imjournal21:02:012
884602993232,0cyclictest0-21swapper/900:30:2115
884592993229,3cyclictest2395797-21snmpd22:06:1212
884592993229,3cyclictest2395797-21snmpd22:06:1112
884592993229,3cyclictest2395797-21snmpd21:09:4912
88459299320,30cyclictest0-21swapper/600:18:3712
88459299320,1cyclictest0-21swapper/620:55:1212
884586993229,2cyclictest2395797-21snmpd00:31:5510
884577993231,1cyclictest858862-21kworker/u32:3+events_unbound19:34:591
884577993228,4cyclictest0-21swapper/119:15:251
88462099310,30cyclictest0-21swapper/1521:31:347
88462099310,30cyclictest0-21swapper/1520:56:157
88462099310,30cyclictest0-21swapper/1519:56:337
88462099310,30cyclictest0-21swapper/1500:19:107
88462099310,30cyclictest0-21swapper/1500:03:337
88461899310,30cyclictest0-21swapper/1423:45:156
88461899310,30cyclictest0-21swapper/1419:49:406
88461399310,30cyclictest0-21swapper/1320:25:145
884610993130,1cyclictest1014014-21kworker/u32:3+flush-259:022:25:204
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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