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2026-05-20 - 23:25

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 May 20, 2026 00:46:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
30815722389369,13sleep110-21swapper/1119:05:383
30816092387381,4sleep30-21swapper/319:06:029
30817312366341,16sleep70-21swapper/719:07:4213
30816532365321,15sleep100-21swapper/1019:06:412
30818512350329,14sleep20-21swapper/219:09:148
30817752350327,15sleep60-21swapper/619:08:1412
30815752347324,15sleep140-21swapper/1419:05:416
30816212344324,13sleep120-21swapper/1219:06:114
30816022344323,14sleep150-21swapper/1519:05:587
30818452342322,13sleep130-21swapper/1319:09:095
30816132342322,13sleep50-21swapper/519:06:0411
30818872341318,14sleep10-21swapper/119:09:451
30818762341319,15sleep90-21swapper/919:09:3715
30815862341320,14sleep80-21swapper/819:05:5114
30816042339319,13sleep00-21swapper/019:05:590
30816122278258,13sleep40-21swapper/419:06:0310
3082368999335,30cyclictest0-21swapper/820:24:0114
3082386999131,30cyclictest0-21swapper/1320:24:015
3082392998931,29cyclictest0-21swapper/1420:24:016
3082365998814,74cyclictest0-21swapper/720:24:0213
308235399780,50cyclictest0-21swapper/320:24:029
3082359996665,1cyclictest3318-21Xorg20:24:0111
3082363995929,30cyclictest0-21swapper/620:24:0112
3082344995728,29cyclictest3082338-21cyclictest20:24:010
3082392995417,24cyclictest3407560-21ssh00:00:546
3082378994443,1cyclictest3318-21Xorg20:24:023
3082375994140,1cyclictest3255487-21kworker/u32:6+events_unbound22:45:172
3082394993938,1cyclictest3318-21Xorg20:24:027
3082392993936,2cyclictest3266735-21kworker/u32:0+flush-259:022:55:256
3082349993835,2cyclictest3212358-21kworker/u32:1+flush-259:021:45:208
3082373993635,1cyclictest3266735-21kworker/u32:0+flush-259:023:05:1915
308236399350,1cyclictest0-21swapper/623:13:4412
3082386993433,1cyclictest3193524-21kworker/u32:5+events_unbound21:41:255
3082378993430,1cyclictest3448328-21kworker/u32:2+events_unbound00:35:183
308236399340,30cyclictest0-21swapper/623:57:4912
3082375993326,1cyclictest3212070-21kworker/10:0+events21:55:172
308235799332,27cyclictest3140516-21kworker/u32:3+i91520:24:0210
308239499320,32cyclictest0-21swapper/1519:51:127
3082392993229,3cyclictest1774-21snmpd19:49:366
3082380993229,3cyclictest1774-21snmpd19:57:364
3082380993224,8cyclictest0-21swapper/1221:55:544
3082375993231,1cyclictest0-21swapper/1020:24:022
3082375993229,3cyclictest3407876-21kworker/10:2+events00:27:492
3082394993129,2cyclictest0-21swapper/1519:40:007
308239299318,10cyclictest0-21swapper/1422:00:046
3082392993130,1cyclictest1774-21snmpd23:50:156
3082380993130,1cyclictest1774-21snmpd20:29:314
3082378993131,0cyclictest0-21swapper/1123:31:363
3082378993131,0cyclictest0-21swapper/1123:23:403
3082378993131,0cyclictest0-21swapper/1100:09:173
3082378993130,1cyclictest3260849-21ssh22:09:113
3082378993130,1cyclictest0-21swapper/1121:20:013
3082375993130,1cyclictest3407876-21kworker/10:2+events00:34:142
3082375993130,1cyclictest3407876-21kworker/10:2+events00:19:312
3082375993130,1cyclictest3377232-21kworker/10:0+events23:53:292
3082375993130,1cyclictest3299447-21kworker/10:2+events23:09:262
3082375993130,1cyclictest3253758-21kworker/10:1+events22:37:042
3082375993130,1cyclictest3253758-21kworker/10:1+events22:30:392
3082375993130,1cyclictest3195853-21kworker/10:2+events21:32:172
3082375993129,1cyclictest3299447-21kworker/10:2+events23:00:082
3082375993129,1cyclictest3238172-21kworker/10:2+events22:00:152
308236599310,30cyclictest0-21swapper/721:24:1413
3082363993130,1cyclictest0-21swapper/619:43:3612
3082363993127,1cyclictest1774-21snmpd19:46:1212
308235999310,30cyclictest0-21swapper/519:57:5411
308235999310,30cyclictest0-21swapper/500:20:1911
3082357993130,1cyclictest1774-21snmpd21:11:4710
308235799310,30cyclictest0-21swapper/423:11:1410
308235799310,30cyclictest0-21swapper/423:03:0610
308235799310,30cyclictest0-21swapper/419:37:4510
3082353993130,1cyclictest1774-21snmpd22:00:159
3082347993130,1cyclictest1774-21snmpd21:03:441
308234799310,30cyclictest0-21swapper/122:40:141
308234499310,30cyclictest0-21swapper/021:50:210
3082394993029,1cyclictest1774-21snmpd22:58:147
3082394993029,1cyclictest1774-21snmpd22:28:197
3082394993029,1cyclictest1774-21snmpd21:53:277
3082394993029,1cyclictest1774-21snmpd00:03:177
3082394993029,1cyclictest0-21swapper/1521:49:397
308239299300,1cyclictest0-21swapper/1400:16:406
3082386993029,1cyclictest0-21swapper/1300:11:525
3082380993029,1cyclictest1774-21snmpd00:19:324
3082380993029,1cyclictest0-21swapper/1223:40:134
3082380993029,1cyclictest0-21swapper/1223:40:134
3082378993030,0cyclictest0-21swapper/1122:21:413
3082378993029,1cyclictest3266735-21kworker/u32:0+flush-259:022:30:183
3082375993030,0cyclictest3407876-21kworker/10:2+events00:07:372
3082375993030,0cyclictest3377232-21kworker/10:0+events00:01:552
3082375993030,0cyclictest3299447-21kworker/10:2+events22:55:342
3082375993030,0cyclictest3299447-21kworker/10:2+events22:52:022
3082375993030,0cyclictest3212070-21kworker/10:0+events21:37:152
3082375993030,0cyclictest2822575-21kworker/10:1+events21:06:572
3082375993029,1cyclictest3407876-21kworker/10:2+events00:35:372
3082375993029,1cyclictest3407876-21kworker/10:2+events00:20:542
3082375993029,1cyclictest3377232-21kworker/10:0+events23:55:512
3082375993029,1cyclictest3377232-21kworker/10:0+events23:48:432
3082375993029,1cyclictest3339532-21kworker/10:1+events23:40:262
3082375993029,1cyclictest3339532-21kworker/10:1+events23:40:252
3082375993029,1cyclictest3339532-21kworker/10:1+events23:35:172
3082375993029,1cyclictest3339532-21kworker/10:1+events23:32:522
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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