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2026-08-11 - 04:20

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 100 highest latencies:
System rack0slot4s.osadl.org (updated Tue Aug 11, 2026 00:45:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16834992398390,5sleep60-21swapper/619:06:5012
16835232362354,5sleep50-21swapper/519:07:0511
16836812359352,4sleep130-21swapper/1319:09:045
16836432355348,5sleep40-21swapper/419:08:3910
16802442353345,5sleep120-21swapper/1219:05:044
16836042351341,6sleep10-21swapper/119:08:041
16834462349340,6sleep140-21swapper/1419:06:096
16834622342333,6sleep110-21swapper/1119:06:233
16834782336327,6sleep80-21swapper/819:06:3514
16835662332323,6sleep90-21swapper/919:07:4015
16835382317309,5sleep20-21swapper/219:07:178
16837412316305,7sleep150-21swapper/1519:09:547
16834772314305,6sleep70-21swapper/719:06:3513
16837082309300,6sleep30-21swapper/319:09:269
16836962188179,6sleep100-21swapper/1019:09:182
1683421210096,2sleep00-21swapper/019:05:550
168416899543,26cyclictest618598-21thunderbird19:49:046
168416899522,25cyclictest0-21swapper/1421:49:536
168416899522,25cyclictest0-21swapper/1421:38:556
1684168994218,14cyclictest618598-21thunderbird20:00:036
1684151994240,2cyclictest1964550-21kworker/u32:0+flush-259:023:30:1914
168416899413,13cyclictest0-21swapper/1421:05:576
168416899402,25cyclictest1854910-21sh22:00:526
1684151993837,1cyclictest1697220-21kworker/u32:0+events_unbound19:30:1914
1684151993837,1cyclictest1697220-21kworker/u32:0+events_unbound19:30:1914
1684168993622,14cyclictest618700-21WRRende~ckend#121:16:576
1684168993612,11cyclictest618598-21thunderbird20:22:026
1684172993328,4cyclictest1774-21snmpd20:18:017
168415999330,32cyclictest0-21swapper/1121:28:343
1684152993330,3cyclictest1774-21snmpd20:29:1215
1684152993327,5cyclictest1774-21snmpd21:51:5215
168415299330,32cyclictest0-21swapper/919:30:5215
168415299330,32cyclictest0-21swapper/919:30:5115
1684151993332,1cyclictest0-21swapper/822:10:4314
1684151993331,2cyclictest1964550-21kworker/u32:0+events_unbound23:35:1814
1684172993227,5cyclictest1774-21snmpd20:50:357
168415799320,1cyclictest0-21swapper/1019:09:592
1684152993229,3cyclictest1774-21snmpd19:39:3615
1684152993229,3cyclictest1774-21snmpd19:39:3615
1684151993232,0cyclictest0-21swapper/823:48:0814
1684151993228,1cyclictest0-21swapper/823:50:1814
1684141993228,4cyclictest0-21swapper/521:20:1711
1684168993129,1cyclictest1774-21snmpd00:27:076
168416899310,30cyclictest0-21swapper/1420:28:026
168416899310,30cyclictest0-21swapper/1419:35:126
168416899310,30cyclictest0-21swapper/1419:35:126
1684164993130,1cyclictest1774-21snmpd21:11:075
168416299310,30cyclictest0-21swapper/1222:55:044
168416299310,30cyclictest0-21swapper/1220:52:574
168415999310,30cyclictest0-21swapper/1122:56:273
1684152993128,3cyclictest1774-21snmpd22:07:0115
1684151993131,0cyclictest0-21swapper/822:41:2214
1684151993130,1cyclictest1774-21snmpd22:24:2414
168415199310,30cyclictest0-21swapper/819:35:1214
168415199310,30cyclictest0-21swapper/819:35:1214
168414799310,30cyclictest0-21swapper/721:33:5213
168414799310,30cyclictest0-21swapper/719:54:5913
1684144993130,1cyclictest1774-21snmpd23:29:0512
168414499310,30cyclictest0-21swapper/619:15:4212
1684136993130,1cyclictest1774-21snmpd20:04:139
1684130993130,1cyclictest0-21swapper/120:27:341
168413099310,31cyclictest618598-21thunderbird22:40:361
168413099310,30cyclictest0-21swapper/121:42:261
168412699317,24cyclictest618598-21thunderbird00:30:210
1684126993131,0cyclictest0-21swapper/023:04:030
1684172993029,1cyclictest618598-21thunderbird19:09:597
1684172993029,1cyclictest1774-21snmpd23:52:457
1684172993029,1cyclictest1774-21snmpd19:41:247
1684172993026,4cyclictest1774-21snmpd22:41:147
168417299300,29cyclictest0-21swapper/1521:10:037
168417299300,29cyclictest0-21swapper/1521:01:117
168417299300,29cyclictest0-21swapper/1520:22:117
1684168993029,1cyclictest1859823-21nodev-device-ev22:05:166
168416899300,30cyclictest0-21swapper/1400:06:236
1684164993029,1cyclictest1774-21snmpd00:27:165
168416499300,30cyclictest0-21swapper/1322:47:285
168416499300,30cyclictest0-21swapper/1320:52:445
168416499300,30cyclictest0-21swapper/1319:49:425
168416499300,30cyclictest0-21swapper/1319:34:395
168416499300,30cyclictest0-21swapper/1319:34:395
168416499300,1cyclictest0-21swapper/1323:30:565
168416499300,1cyclictest0-21swapper/1321:50:585
1684162993029,1cyclictest1994940-21mii-tool23:50:154
1684162993029,1cyclictest1774-21snmpd22:27:414
1684162993029,1cyclictest1774-21snmpd22:27:414
1684159993023,1cyclictest0-21swapper/1122:20:203
1684157993029,1cyclictest1907471-21kworker/10:2+events23:10:492
168415799300,1cyclictest0-21swapper/1023:51:252
1684151993029,1cyclictest1972585-21kworker/u32:1+flush-259:000:10:4314
1684151993029,1cyclictest1774-21snmpd22:25:5714
1684151993029,1cyclictest1774-21snmpd22:25:5714
1684151993029,1cyclictest1774-21snmpd22:06:3414
1684147993029,1cyclictest1774-21snmpd19:36:3313
1684147993029,1cyclictest1774-21snmpd19:36:3313
168414799300,29cyclictest0-21swapper/721:25:0413
168414799300,1cyclictest0-21swapper/722:35:4713
168414799300,1cyclictest0-21swapper/722:35:4713
168414799300,1cyclictest0-21swapper/721:23:5213
168414799300,1cyclictest0-21swapper/720:50:4113
1684144993029,1cyclictest1774-21snmpd21:01:0612
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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