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2026-07-30 - 19:34

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 Thu Jul 30, 2026 00:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
7666932274265,6sleep70-21swapper/718:43:197
7689042259210,39sleep60-21swapper/618:46:286
7687382259210,39sleep30-21swapper/318:44:153
7687452245221,16sleep10-21swapper/118:44:221
7688102244219,17sleep50-21swapper/518:45:185
7690232242216,17sleep40-21swapper/418:48:094
7689092242217,16sleep20-21swapper/218:46:322
7687352241215,17sleep00-21swapper/018:44:130
7815312330,0sleep00-21swapper/019:09:580
769338993331,1cyclictest0-21swapper/120:08:371
769356993232,0cyclictest475598-21kworker/5:0+events21:54:585
769347993130,1cyclictest0-21swapper/300:23:593
76936599300,1cyclictest0-21swapper/722:48:167
769365992824,4cyclictest0-21swapper/721:33:497
76933899286,1cyclictest916-21NetworkManager00:06:431
769338992824,2cyclictest0-21swapper/122:48:171
76936599270,22cyclictest0-21swapper/722:17:417
769356992726,1cyclictest0-21swapper/520:24:355
769338992722,4cyclictest528-21systemd-journal23:18:511
769338992720,5cyclictest865266-21ntpq21:49:451
76933899270,25cyclictest0-21swapper/123:26:341
76936199260,22cyclictest0-21swapper/622:39:466
76935699260,24cyclictest0-21swapper/523:33:525
76935699260,24cyclictest0-21swapper/523:04:125
769352992623,2cyclictest1390-21snmpd20:20:434
76933899260,26cyclictest0-21swapper/119:01:491
76933899260,26cyclictest0-21swapper/119:01:481
76933899260,24cyclictest0-21swapper/121:07:071
769333992625,1cyclictest0-21swapper/020:24:350
769333992622,3cyclictest1390-21snmpd00:16:460
769365992522,3cyclictest862149-21cat21:44:227
769365992520,4cyclictest942021-21cat00:18:417
769361992518,5cyclictest0-21swapper/621:00:106
76935699251,22cyclictest0-21swapper/522:41:385
76935699250,1cyclictest0-21swapper/521:23:425
76935699250,1cyclictest0-21swapper/521:23:415
769347992521,3cyclictest1390-21snmpd19:55:133
769347992521,3cyclictest1390-21snmpd19:41:153
769343992522,2cyclictest1390-21snmpd23:52:582
769343992521,3cyclictest1390-21snmpd20:35:152
769338992521,3cyclictest1390-21snmpd21:23:261
769338992521,3cyclictest1390-21snmpd21:23:251
76933899250,23cyclictest0-21swapper/123:40:051
76933899250,23cyclictest0-21swapper/120:20:551
76933899250,22cyclictest0-21swapper/120:28:311
769333992522,2cyclictest1390-21snmpd22:32:130
769365992421,2cyclictest1390-21snmpd21:15:047
769365992420,1cyclictest1390-21snmpd18:48:407
769365992420,1cyclictest1390-21snmpd00:13:357
769365992419,1cyclictest1390-21snmpd00:08:127
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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