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2026-04-20 - 00:39

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 Sun Apr 19, 2026 00:46:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9733482405386,12sleep140-21swapper/1419:07:336
9735262368348,13sleep80-21swapper/819:09:5214
9733402367347,13sleep60-21swapper/619:07:2512
9732872362341,14sleep20-21swapper/219:06:498
9732852362346,10sleep00-21swapper/019:06:470
9734722361326,12sleep90-21swapper/919:09:0415
9734682359320,13sleep50-21swapper/519:09:0011
9732202359319,13sleep130-21swapper/1319:05:555
9734072354334,13sleep110-21swapper/1119:08:183
9733582354334,13sleep70-21swapper/719:07:4213
9734502353333,13sleep120-21swapper/1219:08:524
9733222353334,13sleep100-21swapper/1019:07:132
9732052350330,13sleep30-21swapper/319:05:459
9734142349330,12sleep10-21swapper/119:08:241
9732482349329,13sleep150-21swapper/1519:06:137
9735222348328,13sleep40-21swapper/419:09:4810
973982994545,0cyclictest0-21swapper/320:38:179
974013994242,0cyclictest0-21swapper/1321:29:045
973982993633,2cyclictest1168079-21iostat_ios22:20:169
974013993535,0cyclictest0-21swapper/1322:24:085
974013993535,0cyclictest0-21swapper/1319:51:335
974008993528,4cyclictest0-21swapper/1121:03:533
97401399340,30cyclictest0-21swapper/1320:38:175
974008993430,4cyclictest0-21swapper/1120:12:413
97402099330,30cyclictest0-21swapper/1519:45:147
974013993333,0cyclictest0-21swapper/1323:39:555
974008993333,0cyclictest0-21swapper/1123:11:543
974008993333,0cyclictest0-21swapper/1122:06:073
97401099321,30cyclictest0-21swapper/1220:43:014
97400899320,32cyclictest124-21ksoftirqd/1121:23:573
974015993129,1cyclictest1774-21snmpd23:31:046
97401599310,30cyclictest0-21swapper/1422:06:276
97401599310,30cyclictest0-21swapper/1419:45:346
974013993130,1cyclictest1774-21snmpd00:01:385
974013993130,1cyclictest1774-21snmpd00:01:385
974013993127,4cyclictest0-21swapper/1319:47:055
974008993131,0cyclictest0-21swapper/1122:57:593
97400899310,31cyclictest1268737-21kworker/11:0-events23:53:133
974003993130,1cyclictest1149733-21kworker/10:1+events22:08:152
97400399310,30cyclictest0-21swapper/1022:37:102
97400199310,30cyclictest0-21swapper/923:03:5515
97399499310,30cyclictest0-21swapper/723:58:3313
97399499310,30cyclictest0-21swapper/723:58:3213
97399499310,30cyclictest0-21swapper/722:17:4113
97399499310,30cyclictest0-21swapper/700:11:1813
97399499310,30cyclictest0-21swapper/700:00:0613
97399499310,30cyclictest0-21swapper/700:00:0513
97399499310,1cyclictest0-21swapper/722:10:1313
973987993130,1cyclictest1774-21snmpd20:41:2710
97398799310,30cyclictest0-21swapper/419:12:4810
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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