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2026-06-18 - 00:25

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 Wed Jun 17, 2026 00:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
29410912259235,16sleep30-21swapper/319:08:173
29410182258228,20sleep00-21swapper/019:07:190
29412472250210,17sleep50-21swapper/519:09:565
29410162250241,6sleep70-21swapper/719:07:177
29410042247225,14sleep40-21swapper/419:07:064
29412012245220,17sleep60-21swapper/619:09:336
29410902245219,17sleep20-21swapper/219:08:172
29409682245196,17sleep10-21swapper/119:06:391
2941564993631,3cyclictest3104487-21cpu00:05:136
294156099327,24cyclictest2753-21gnome-shell22:34:585
2941560993129,1cyclictest0-21swapper/500:25:265
2941546992922,6cyclictest1390-21snmpd00:09:222
2941546992821,6cyclictest1390-21snmpd21:07:052
294153399280,24cyclictest0-21swapper/020:43:150
294156999270,25cyclictest0-21swapper/722:38:357
2941546992720,6cyclictest1390-21snmpd23:36:152
2941546992720,6cyclictest1390-21snmpd20:08:532
294154199270,25cyclictest0-21swapper/122:15:251
294154199270,25cyclictest0-21swapper/122:15:241
294153399270,25cyclictest0-21swapper/000:28:530
2941569992620,2cyclictest0-21swapper/721:10:147
294156999260,24cyclictest0-21swapper/722:20:167
2941564992622,3cyclictest1390-21snmpd00:32:146
2941564992619,5cyclictest528-21systemd-journal20:54:106
2941560992619,6cyclictest1390-21snmpd22:41:565
2941560992613,7cyclictest3094818-21ntp_kernel_pll_23:45:205
294156099260,24cyclictest0-21swapper/519:31:175
294156099260,22cyclictest0-21swapper/519:16:255
2941555992625,1cyclictest0-21swapper/419:20:184
294155599260,22cyclictest0-21swapper/421:04:414
2941551992622,3cyclictest1390-21snmpd19:22:093
2941546992622,3cyclictest1390-21snmpd22:16:072
2941546992622,3cyclictest1390-21snmpd22:16:062
2941546992621,4cyclictest1390-21snmpd19:47:382
2941546992621,4cyclictest1390-21snmpd19:47:372
2941546992621,4cyclictest1390-21snmpd19:32:592
2941546992619,6cyclictest1390-21snmpd23:45:302
2941546992619,6cyclictest1390-21snmpd20:10:002
294153399260,22cyclictest0-21swapper/022:58:250
2941569992521,3cyclictest1390-21snmpd22:04:077
2941569992521,3cyclictest1390-21snmpd20:43:347
2941569992518,5cyclictest0-21swapper/720:57:107
2941569992513,1cyclictest0-21swapper/723:55:157
294156999250,23cyclictest0-21swapper/720:46:527
2941564992522,2cyclictest1390-21snmpd22:04:256
2941560992520,4cyclictest1390-21snmpd22:51:265
294156099250,23cyclictest0-21swapper/523:17:455
294156099250,23cyclictest0-21swapper/520:25:105
294156099250,22cyclictest0-21swapper/519:55:165
294156099250,1cyclictest0-21swapper/520:23:165
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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