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2025-11-14 - 01:20

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 Fri Nov 14, 2025 00:46:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17760162390369,14sleep90-21swapper/919:05:3015
17761642374340,27sleep140-21swapper/1419:07:286
17760632367346,13sleep20-21swapper/219:06:118
17762102354313,13sleep70-21swapper/719:08:0913
17761312353332,14sleep80-21swapper/819:07:0614
17760882350327,15sleep40-21swapper/419:06:2910
17762412349328,14sleep150-21swapper/1519:08:337
17761962349328,14sleep100-21swapper/1019:07:562
17761972346325,14sleep110-21swapper/1119:07:573
17761622346324,14sleep120-21swapper/1219:07:264
17761682345324,14sleep10-21swapper/119:07:311
17760972344322,15sleep130-21swapper/1319:06:395
17760302344324,13sleep50-21swapper/519:05:4211
17762092342319,15sleep60-21swapper/619:08:0812
17762062341319,14sleep30-21swapper/319:08:059
17762432340320,13sleep00-21swapper/019:08:340
177674499118118,0cyclictest0-21swapper/819:19:0514
17767479911528,45cyclictest0-21swapper/921:21:0115
17767189911444,70cyclictest0-21swapper/021:21:010
17767569910426,78cyclictest0-21swapper/1221:21:014
17767629910129,28cyclictest0-21swapper/1419:19:056
17767409910034,31cyclictest0-21swapper/721:21:0113
1776759999635,31cyclictest0-21swapper/1321:21:005
1776718999536,30cyclictest0-21swapper/019:19:050
1776759999334,31cyclictest0-21swapper/1319:19:055
1776766999134,28cyclictest0-21swapper/1519:19:057
1776756999132,30cyclictest0-21swapper/1219:19:064
1776731998611,75cyclictest0-21swapper/419:19:0610
1776725998528,29cyclictest0-21swapper/221:21:018
1776766997719,29cyclictest0-21swapper/1521:21:017
1776762996741,11cyclictest0-21swapper/1421:21:016
1776723996161,0cyclictest3411-21Xorg21:21:001
1776740995425,0cyclictest0-21swapper/719:19:0513
1776749995150,1cyclictest3411-21Xorg21:21:012
1776734994618,28cyclictest0-21swapper/521:21:0011
1776766994342,1cyclictest1759843-21kworker/u32:4+flush-259:019:20:207
1776738994342,1cyclictest3411-21Xorg19:19:0512
1776749994140,1cyclictest3411-21Xorg19:19:052
1776734994140,1cyclictest3411-21Xorg19:19:0511
1776738993938,1cyclictest3411-21Xorg21:21:0112
1776718993625,9cyclictest2395797-21snmpd23:45:030
1776759993532,2cyclictest1993734-21kworker/u32:1+flush-259:000:27:205
1776747993432,1cyclictest0-21swapper/923:05:1515
1776744993332,1cyclictest3411-21Xorg21:21:0114
1776738993320,3cyclictest211rcu_preempt00:25:1612
1776718993329,4cyclictest2395797-21snmpd23:19:490
1776718993328,5cyclictest2395797-21snmpd22:58:220
177675499324,28cyclictest0-21swapper/1100:12:163
1776740993227,4cyclictest1763863-1kworker/u33:2+i915_flip00:11:0313
177672399320,31cyclictest0-21swapper/123:15:161
1776718993229,3cyclictest2395797-21snmpd20:52:240
1776766993131,0cyclictest0-21swapper/1519:35:247
1776766993127,4cyclictest66450irq/154-i91523:47:327
177676299310,30cyclictest0-21swapper/1400:03:426
177675699310,30cyclictest0-21swapper/1223:32:564
1776754993131,0cyclictest0-21swapper/1121:46:323
1776754993131,0cyclictest0-21swapper/1121:46:323
177675499310,31cyclictest0-21swapper/1119:19:053
177674999310,30cyclictest0-21swapper/1023:13:442
177674799310,30cyclictest0-21swapper/921:53:0315
177674799310,30cyclictest0-21swapper/921:53:0315
177674799310,30cyclictest0-21swapper/919:20:1715
177674799310,30cyclictest0-21swapper/919:11:5315
177674499310,30cyclictest0-21swapper/819:51:3014
177674099310,30cyclictest0-21swapper/723:20:1513
177674099310,30cyclictest0-21swapper/720:10:2113
177673499310,30cyclictest0-21swapper/519:25:0211
177673499310,1cyclictest0-21swapper/523:07:3711
1776731993131,0cyclictest1884408-21kworker/4:2+events21:21:0010
1776731993130,1cyclictest2395797-21snmpd21:16:2410
177673199310,30cyclictest0-21swapper/423:20:5510
177673199310,30cyclictest0-21swapper/422:21:3910
1776728993130,1cyclictest2395797-21snmpd20:07:019
1776728993128,2cyclictest0-21swapper/321:21:029
1776725993130,1cyclictest2395797-21snmpd22:20:538
177672599310,30cyclictest0-21swapper/221:50:318
177672599310,30cyclictest0-21swapper/221:50:318
177672599310,30cyclictest0-21swapper/220:34:028
177672599310,30cyclictest0-21swapper/219:11:408
1776723993130,1cyclictest0-21swapper/100:15:121
177672399310,30cyclictest0-21swapper/120:15:431
177671899310,30cyclictest0-21swapper/020:23:310
1776766993030,0cyclictest0-21swapper/1522:10:297
1776766993030,0cyclictest0-21swapper/1500:30:287
1776766993029,1cyclictest2395797-21snmpd20:21:477
1776762993029,1cyclictest1778846-21mii-tool19:10:156
1776762993029,1cyclictest0-21swapper/1420:50:516
177676299300,30cyclictest0-21swapper/1400:09:546
1776759993029,1cyclictest2395797-21snmpd19:33:235
1776759993029,1cyclictest0-21swapper/1321:32:495
1776759993029,1cyclictest0-21swapper/1321:11:135
1776759993029,1cyclictest0-21swapper/1320:38:325
177675999300,30cyclictest0-21swapper/1323:18:045
177675999300,1cyclictest0-21swapper/1320:44:155
1776756993025,3cyclictest0-21swapper/1223:16:544
177675699300,30cyclictest0-21swapper/1223:11:184
177675699300,30cyclictest0-21swapper/1220:41:344
177675699300,30cyclictest0-21swapper/1220:30:064
177675699300,29cyclictest0-21swapper/1223:51:104
177675699300,29cyclictest0-21swapper/1223:41:424
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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