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2026-04-14 - 06:16

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 Apr 14, 2026 00:46:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4233352366359,5sleep130-21swapper/1319:08:435
4234002365328,13sleep30-21swapper/319:09:229
4230562364347,11sleep80-21swapper/819:05:4214
4231582359321,30sleep20-21swapper/219:06:568
4231032359339,13sleep100-21swapper/1019:06:162
4231112353335,12sleep10-21swapper/119:06:231
4230902353332,14sleep140-21swapper/1419:06:046
4233942348325,15sleep150-21swapper/1519:09:187
4231512348325,15sleep120-21swapper/1219:06:504
4230992348327,14sleep60-21swapper/619:06:1212
4230872348328,13sleep110-21swapper/1119:06:013
4230782348328,13sleep50-21swapper/519:05:5411
4231022347327,13sleep90-21swapper/919:06:1515
4230762346326,13sleep40-21swapper/419:05:5410
4232992344322,14sleep70-21swapper/719:08:2213
4231562344323,14sleep00-21swapper/019:06:540
423955995328,0cyclictest0-21swapper/1420:41:516
423915994544,1cyclictest579470-21kworker/u32:3+events_unbound22:45:138
423955994128,0cyclictest0-21swapper/1420:52:506
423915993928,11cyclictest1322-21gpm21:19:558
423955993825,0cyclictest0-21swapper/1423:48:346
423915993837,1cyclictest697507-21kworker/u32:3+events_unbound23:23:378
42391099365,31cyclictest0-21swapper/123:34:271
423910993632,4cyclictest0-21swapper/122:52:411
423955993421,0cyclictest0-21swapper/1419:35:576
42394899330,30cyclictest0-21swapper/1222:35:174
42394599330,29cyclictest0-21swapper/1123:40:153
42394299330,4cyclictest0-21swapper/1023:30:152
42394299330,32cyclictest0-21swapper/1022:53:122
42395599327,14cyclictest0-21swapper/1422:42:406
42395599327,0cyclictest0-21swapper/1423:59:336
42395599327,0cyclictest0-21swapper/1400:21:316
423920993232,0cyclictest0-21swapper/422:52:4110
423915993232,0cyclictest0-21swapper/222:51:358
423915993231,0cyclictest0-21swapper/223:34:278
423915993230,2cyclictest0-21swapper/200:10:198
42391599320,29cyclictest0-21swapper/200:33:118
423910993232,0cyclictest0-21swapper/121:55:491
42395599317,13cyclictest0-21swapper/1423:04:386
42395599317,13cyclictest0-21swapper/1422:20:426
42395599317,13cyclictest0-21swapper/1421:14:486
423955993130,1cyclictest1774-21snmpd20:15:476
42395599310,30cyclictest0-21swapper/1421:55:156
42395599310,30cyclictest0-21swapper/1421:32:046
42395599310,30cyclictest0-21swapper/1421:00:096
42395599310,30cyclictest0-21swapper/1420:21:146
42395199310,30cyclictest0-21swapper/1322:37:505
42395199310,30cyclictest0-21swapper/1300:16:265
423948993130,1cyclictest1774-21snmpd20:30:534
423945993130,1cyclictest1774-21snmpd21:24:393
42394599310,30cyclictest0-21swapper/1120:05:153
42394599310,30cyclictest0-21swapper/1100:22:413
423942993130,1cyclictest613234-21kworker/10:0+events23:47:332
423942993130,1cyclictest613234-21kworker/10:0+events23:27:352
423942993129,1cyclictest613234-21kworker/10:0+events23:56:572
423942993129,1cyclictest613234-21kworker/10:0+events23:43:152
423942993129,1cyclictest613234-21kworker/10:0+events23:38:072
423942993129,1cyclictest613234-21kworker/10:0+events23:09:252
423942993129,1cyclictest613234-21kworker/10:0+events22:48:232
423942993129,1cyclictest613234-21kworker/10:0+events00:23:132
423942993129,1cyclictest613234-21kworker/10:0+events00:08:332
423942993129,1cyclictest515393-21kworker/10:1+events20:57:452
423942993129,1cyclictest406735-21kworker/10:0+events21:41:112
423942993129,1cyclictest406735-21kworker/10:0+events21:41:112
423942993129,1cyclictest406735-21kworker/10:0+events21:18:312
423942993127,3cyclictest1774-21snmpd20:44:322
42394299310,30cyclictest0-21swapper/1022:28:502
42394299310,30cyclictest0-21swapper/1021:56:252
42394299310,30cyclictest0-21swapper/1021:04:002
42394299310,30cyclictest0-21swapper/1019:32:092
42393399310,30cyclictest0-21swapper/722:15:2313
423927993130,1cyclictest1774-21snmpd22:18:3812
423927993130,1cyclictest1774-21snmpd22:11:5912
42392299310,30cyclictest0-21swapper/519:30:1611
42391799310,30cyclictest0-21swapper/322:09:269
42391799310,30cyclictest0-21swapper/321:29:589
423915993130,1cyclictest675376-21kworker/2:2+mm_percpu_wq23:35:198
423915993130,1cyclictest1774-21snmpd19:22:068
423915993130,1cyclictest0-21swapper/223:41:398
423915993129,2cyclictest0-21swapper/221:11:498
423915993127,1cyclictest0-21swapper/200:20:238
42391599310,31cyclictest0-21swapper/223:51:338
42391599310,31cyclictest0-21swapper/222:55:338
42391599310,29cyclictest0-21swapper/222:35:498
42391599310,29cyclictest0-21swapper/221:25:198
423910993131,0cyclictest0-21swapper/123:08:271
42391099311,29cyclictest0-21swapper/123:00:131
42390799310,30cyclictest0-21swapper/023:21:040
42390799310,30cyclictest0-21swapper/022:27:200
423957993029,1cyclictest1774-21snmpd00:16:597
42395799300,30cyclictest647444-21ssh22:43:547
42395799300,30cyclictest0-21swapper/1522:20:387
42395799300,30cyclictest0-21swapper/1500:11:027
42395799300,1cyclictest0-21swapper/1500:20:177
42395599306,13cyclictest0-21swapper/1419:46:566
42395599306,13cyclictest0-21swapper/1419:13:596
42395599306,13cyclictest0-21swapper/1400:10:326
42395599300,30cyclictest0-21swapper/1420:58:396
423951993029,1cyclictest447969-21ethtool19:35:155
42395199300,29cyclictest0-21swapper/1322:01:135
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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