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2026-06-17 - 12:30

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 Wed Jun 17, 2026 00:45:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
24496922398392,4sleep90-21swapper/919:09:0915
24497582372365,5sleep140-21swapper/1419:09:476
24495132365327,13sleep10-21swapper/119:06:511
24474672360351,6sleep00-21swapper/019:05:150
24496392357336,14sleep60-21swapper/619:08:3312
24496962354334,13sleep120-21swapper/1219:09:114
24495252353332,14sleep130-21swapper/1319:07:055
24496782352332,13sleep150-21swapper/1519:08:597
24494922352332,13sleep50-21swapper/519:06:3911
24497522351331,13sleep100-21swapper/1019:09:422
24496242350330,13sleep110-21swapper/1119:08:223
24496192350331,13sleep70-21swapper/719:08:1813
24496542348327,14sleep30-21swapper/319:08:479
24495712346324,14sleep20-21swapper/219:07:428
24495852345324,14sleep80-21swapper/819:07:4814
24496162344325,12sleep40-21swapper/419:08:1510
245020499510,26cyclictest0-21swapper/1421:27:016
245020499500,26cyclictest0-21swapper/1421:38:006
245020499500,25cyclictest0-21swapper/1423:27:506
245020499500,25cyclictest0-21swapper/1423:05:516
245020499500,25cyclictest0-21swapper/1421:59:576
245020499490,24cyclictest0-21swapper/1421:48:586
245020499470,22cyclictest0-21swapper/1400:22:456
2450204994610,11cyclictest0-21swapper/1419:26:126
2450170994343,0cyclictest0-21swapper/319:10:039
245018599421,0cyclictest951rcuc/821:35:5414
2450162993837,1cyclictest2795699-21kworker/u32:2+flush-259:000:35:160
2450185993737,0cyclictest0-21swapper/819:20:1614
2450164993735,1cyclictest2446268-21kworker/u32:0+flush-259:019:25:181
2450185993534,1cyclictest2685421-21kworker/u32:3+events_unbound22:55:1614
2450185993534,1cyclictest2620567-21kworker/u32:4+flush-259:022:20:1414
2450170993535,0cyclictest0-21swapper/323:36:299
2450170993535,0cyclictest0-21swapper/323:36:299
2450185993434,0cyclictest0-21swapper/823:56:3114
2450185993434,0cyclictest0-21swapper/823:48:1914
2450185993434,0cyclictest0-21swapper/823:42:4714
2450185993434,0cyclictest0-21swapper/823:42:4714
2450185993434,0cyclictest0-21swapper/819:10:0414
2450200993330,3cyclictest1774-21snmpd21:15:065
2450200993329,4cyclictest2580044-21ethtool21:30:165
2450194993329,1cyclictest1774-21snmpd20:19:333
2450194993329,1cyclictest1774-21snmpd19:51:433
2450185993333,0cyclictest0-21swapper/822:07:3114
2450170993333,0cyclictest0-21swapper/320:26:149
2450170993333,0cyclictest0-21swapper/320:26:149
2450194993229,1cyclictest1774-21snmpd23:30:533
2450194993229,1cyclictest1774-21snmpd23:30:533
2450185993232,0cyclictest0-21swapper/820:57:5214
2450185993232,0cyclictest0-21swapper/800:32:0514
2450185993230,2cyclictest2648086-21kworker/8:0-events22:52:4114
2450170993232,0cyclictest0-21swapper/321:01:079
2450170993232,0cyclictest0-21swapper/320:24:529
245020699310,30cyclictest0-21swapper/1521:18:407
245020499317,13cyclictest0-21swapper/1423:49:486
245020499310,30cyclictest0-21swapper/1400:25:216
245019499310,30cyclictest2490629-21diskstats19:55:133
2450191993130,1cyclictest2569345-21kworker/10:2+events21:26:442
245018999310,30cyclictest0-21swapper/923:51:5615
2450185993131,0cyclictest0-21swapper/823:20:4314
2450185993131,0cyclictest0-21swapper/823:14:3714
2450185993130,1cyclictest0-21swapper/800:18:5214
2450183993130,1cyclictest1774-21snmpd22:59:5113
2450183993130,1cyclictest1774-21snmpd20:54:5813
245018399310,30cyclictest0-21swapper/719:19:4613
245016899310,30cyclictest0-21swapper/219:30:578
245016499310,30cyclictest0-21swapper/122:55:161
245016299310,30cyclictest0-21swapper/020:35:570
245016299310,30cyclictest0-21swapper/020:35:570
2450206993029,1cyclictest0-21swapper/1522:50:167
245020499306,13cyclictest0-21swapper/1420:54:046
245020499306,13cyclictest0-21swapper/1400:33:436
245020499305,14cyclictest0-21swapper/1421:05:036
245020499300,30cyclictest0-21swapper/1420:29:326
245020499300,30cyclictest0-21swapper/1420:29:326
245020499300,29cyclictest0-21swapper/1422:21:386
2450200993030,0cyclictest2512007-21mii-tool20:20:145
245020099300,30cyclictest0-21swapper/1321:09:515
2450198993029,1cyclictest1774-21snmpd21:38:164
245019899300,30cyclictest0-21swapper/1223:59:024
2450194993029,1cyclictest0-21swapper/1123:22:383
245019499300,29cyclictest0-21swapper/1120:10:153
2450191993029,1cyclictest2712826-21kworker/10:2+events23:39:552
2450191993029,1cyclictest2712826-21kworker/10:2+events23:39:542
2450191993029,1cyclictest2569345-21kworker/10:2+events21:31:542
2450191993029,1cyclictest1774-21snmpd23:20:532
2450191993029,1cyclictest1774-21snmpd19:32:272
245019199300,30cyclictest0-21swapper/1023:00:492
245019199300,29cyclictest0-21swapper/1022:15:172
245019199300,1cyclictest0-21swapper/1021:48:292
2450189993029,1cyclictest1774-21snmpd21:44:5815
2450189993029,1cyclictest1774-21snmpd20:59:1615
245018999300,30cyclictest0-21swapper/921:12:4315
245018999300,29cyclictest0-21swapper/920:10:3715
245018999300,27cyclictest0-21swapper/921:20:1515
245018999300,1cyclictest0-21swapper/900:02:3615
2450185993030,0cyclictest0-21swapper/820:53:0214
2450185993030,0cyclictest0-21swapper/819:16:3214
2450185993030,0cyclictest0-21swapper/800:36:0914
2450183993029,1cyclictest1774-21snmpd21:26:3213
245018399300,29cyclictest0-21swapper/700:34:4613
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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