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2026-08-07 - 02:59

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 Fri Aug 07, 2026 00:45:37)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27963722353336,6sleep60-21swapper/619:06:2112
27963362351342,6sleep130-21swapper/1319:05:565
27966102350341,6sleep80-21swapper/819:09:2014
27965482348339,6sleep110-21swapper/1119:08:353
27966662347338,6sleep90-21swapper/919:09:5315
27963702347339,5sleep50-21swapper/519:06:1911
27963542343335,5sleep100-21swapper/1019:06:092
27965112341332,6sleep150-21swapper/1519:08:077
27966182337328,6sleep140-21swapper/1419:09:266
27962982325317,5sleep10-21swapper/119:05:281
27963352317308,6sleep120-21swapper/1219:05:554
27966562306296,7sleep20-21swapper/219:09:468
27963042299290,6sleep70-21swapper/719:05:3413
27965832283274,6sleep30-21swapper/319:08:599
27965412261252,6sleep40-21swapper/419:08:2810
2796363210096,2sleep00-21swapper/019:06:150
2797160993736,1cyclictest3019022-21kworker/u32:0+flush-259:023:27:182
279712699360,35cyclictest0-21swapper/022:45:160
279712699350,34cyclictest0-21swapper/023:05:130
279712699350,34cyclictest0-21swapper/023:05:130
2797166993433,1cyclictest0-21swapper/1223:16:424
279716799331,30cyclictest0-21swapper/1323:21:505
2797142993331,2cyclictest2791212-21kworker/u32:3+events_unbound19:15:0112
279712699330,30cyclictest0-21swapper/022:17:310
2797174993228,1cyclictest618700-21WRRende~ckend#121:45:167
279717299320,29cyclictest0-21swapper/1420:35:176
2797166993232,0cyclictest0-21swapper/1222:43:304
2797166993232,0cyclictest0-21swapper/1221:53:594
2797166993229,1cyclictest211rcu_preempt22:14:184
279716699320,29cyclictest0-21swapper/1220:10:144
2797142993229,3cyclictest1774-21snmpd20:36:2712
2797137993228,3cyclictest1774-21snmpd23:31:2610
2797137993228,3cyclictest1774-21snmpd22:02:5310
279713799320,29cyclictest0-21swapper/423:20:1610
2797134993231,1cyclictest2903829-21kworker/u32:1+flush-259:022:10:229
279713199321,30cyclictest0-21swapper/220:28:478
279713199320,29cyclictest0-21swapper/223:40:168
2797126993227,1cyclictest1774-21snmpd22:26:240
279717499310,30cyclictest0-21swapper/1519:27:317
279717299316,14cyclictest0-21swapper/1422:38:336
279717299310,6cyclictest0-21swapper/1400:39:236
279717299310,30cyclictest0-21swapper/1420:11:026
279717299310,30cyclictest0-21swapper/1400:17:066
279717299310,28cyclictest0-21swapper/1419:15:166
2797166993131,0cyclictest0-21swapper/1221:55:344
2797166993131,0cyclictest0-21swapper/1220:16:524
2797162993130,1cyclictest1774-21snmpd20:43:003
279716299310,30cyclictest0-21swapper/1123:57:273
279716299310,30cyclictest0-21swapper/1122:37:483
279716099310,30cyclictest0-21swapper/1019:21:422
2797142993130,1cyclictest1774-21snmpd23:45:4412
279714299310,30cyclictest0-21swapper/622:09:5012
279714299310,30cyclictest0-21swapper/600:12:5112
279713799310,30cyclictest0-21swapper/423:35:1410
2797134993131,0cyclictest0-21swapper/323:41:059
2797134993130,1cyclictest0-21swapper/300:32:029
279713199310,30cyclictest0-21swapper/222:21:108
2797128993130,1cyclictest1774-21snmpd23:51:021
2797128993130,1cyclictest0-21swapper/100:34:031
279712899310,30cyclictest0-21swapper/123:28:351
279712899310,30cyclictest0-21swapper/123:06:521
279712899310,30cyclictest0-21swapper/123:06:521
279712899310,30cyclictest0-21swapper/121:25:501
2797126993130,1cyclictest1774-21snmpd21:29:430
2797126993130,1cyclictest0-21swapper/000:04:550
279712699310,30cyclictest0-21swapper/022:24:520
2797174993029,1cyclictest1774-21snmpd22:26:007
2797174993028,2cyclictest2888816-21kworker/u32:0+flush-259:021:10:207
279717499300,30cyclictest0-21swapper/1500:36:217
279717499300,1cyclictest0-21swapper/1522:03:177
2797172993029,1cyclictest2946007-21mii-tool21:45:166
279717299300,29cyclictest0-21swapper/1423:17:136
279716799300,30cyclictest0-21swapper/1319:26:305
279716799300,1cyclictest0-21swapper/1323:17:135
2797166993030,0cyclictest0-21swapper/1223:29:064
2797166993029,1cyclictest3014405-21kworker/12:1-mm_percpu_wq23:11:224
2797166993029,1cyclictest1774-21snmpd19:42:044
279716699300,30cyclictest618598-21thunderbird23:03:204
279716699300,30cyclictest618598-21thunderbird23:03:204
279716699300,30cyclictest0-21swapper/1221:14:194
2797162993029,1cyclictest1774-21snmpd21:46:143
2797162993029,1cyclictest1774-21snmpd19:29:313
2797162993029,1cyclictest0-21swapper/1122:25:163
279716299300,29cyclictest0-21swapper/1122:52:403
2797160993029,1cyclictest3005725-21kworker/10:0+events22:32:102
2797160993029,1cyclictest3005725-21kworker/10:0+events00:17:152
2797160993029,1cyclictest1774-21snmpd19:33:402
2797152993029,1cyclictest1774-21snmpd23:46:5614
2797152993029,1cyclictest1774-21snmpd19:57:5814
2797152993029,1cyclictest1774-21snmpd19:57:5814
2797152993029,1cyclictest0-21swapper/822:31:5114
279715299300,30cyclictest0-21swapper/819:10:1414
279714799300,1cyclictest0-21swapper/723:27:3213
279714299300,29cyclictest618598-21thunderbird22:03:2912
279714299300,29cyclictest0-21swapper/620:40:1312
279714299300,1cyclictest0-21swapper/621:49:3912
279714199300,30cyclictest0-21swapper/521:14:5211
279714199300,30cyclictest0-21swapper/519:38:1911
279714199300,29cyclictest0-21swapper/520:00:1611
279714199300,29cyclictest0-21swapper/520:00:1611
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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