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2026-07-23 - 19:03

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 Thu Jul 23, 2026 00:45:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
281837726646,1sleep60-21swapper/619:07:0912
418998610,59rtkit-daemon0-21swapper/019:09:190
281840825856,1sleep140-21swapper/1419:07:346
281909399470,21cyclictest618598-21thunderbird23:40:228
281851024644,1sleep10-21swapper/119:08:561
281842324644,1sleep110-21swapper/1119:07:463
2819127994544,1cyclictest2796360-1kworker/u33:0+i915_flip21:44:526
281912799436,13cyclictest618598-21thunderbird23:40:146
2819127994317,26cyclictest105512-21IMAP20:33:316
281912799413,25cyclictest0-21swapper/1400:13:116
2819127994016,13cyclictest0-21swapper/1420:11:336
281842024038,1sleep90-21swapper/919:07:4515
2819127993916,13cyclictest0-21swapper/1400:35:086
281847923937,1sleep50-21swapper/519:08:2811
2819101993830,8cyclictest2796360-1kworker/u33:0+i915_flip22:31:1411
281855823836,1sleep20-21swapper/219:09:298
281511123836,1sleep130-21swapper/1319:05:095
2819093993732,3cyclictest2821420-21kworker/u32:1+events_unbound19:42:198
281852623735,1sleep100-21swapper/1019:09:052
281841823634,1sleep70-21swapper/719:07:4213
2819095993534,1cyclictest0-21swapper/319:40:359
2819093993529,3cyclictest618598-21thunderbird21:08:578
281850423533,1sleep120-21swapper/1219:08:524
281848923532,2sleep150-21swapper/1519:08:397
281912799349,25cyclictest0-21swapper/1419:49:366
281909399344,1cyclictest618619-21glean.dispatche19:46:158
281909399340,34cyclictest618598-21thunderbird20:29:258
281847523432,1sleep30-21swapper/319:08:269
281831823432,1sleep80-21swapper/819:06:2314
2819131993332,1cyclictest2903421-21kworker/u32:2+flush-259:021:05:277
2819114993333,0cyclictest0-21swapper/923:22:4515
2819109993331,2cyclictest2890841-21kworker/u32:3+flush-259:020:40:1713
2819093993329,4cyclictest618598-21thunderbird23:57:478
2819093993328,2cyclictest618598-21thunderbird20:55:478
2819093993310,23cyclictest2984456-21ssh21:58:328
281909399330,31cyclictest618598-21thunderbird22:05:078
281909399330,30cyclictest618598-21thunderbird19:54:498
281909399330,30cyclictest0-21swapper/220:17:538
281909399330,29cyclictest0-21swapper/223:36:038
281831423331,1sleep40-21swapper/419:06:1910
2819116993229,1cyclictest2886812-21kworker/10:0+events20:57:272
281910499320,31cyclictest618598-21thunderbird23:40:1112
281910199326,16cyclictest3027804-21kworker/u32:1+flush-259:022:46:1111
2819095993230,1cyclictest0-21swapper/320:22:229
2819093993228,3cyclictest2930700-21kworker/u32:5+events_unbound22:28:428
281909399322,1cyclictest3147781-21kworker/u32:1+flush-259:000:19:498
281909399320,31cyclictest0-21swapper/221:10:568
281909399320,30cyclictest618698-21WRScene~ilder#120:02:158
281909399320,30cyclictest618698-21WRScene~ilder#120:02:158
281909399320,30cyclictest618598-21thunderbird21:42:268
281909399320,30cyclictest618598-21thunderbird21:29:258
281909399320,30cyclictest618598-21thunderbird20:43:278
281909399320,30cyclictest618598-21thunderbird20:08:448
281909399320,30cyclictest618598-21thunderbird20:08:438
281909399320,30cyclictest618598-21thunderbird19:35:348
281909399320,30cyclictest618598-21thunderbird19:22:298
281909399320,29cyclictest0-21swapper/223:47:318
281909399320,29cyclictest0-21swapper/223:25:298
281909399320,29cyclictest0-21swapper/223:11:248
281909399320,29cyclictest0-21swapper/223:07:218
281909399320,29cyclictest0-21swapper/223:00:028
281909399320,29cyclictest0-21swapper/223:00:018
281909399320,29cyclictest0-21swapper/222:10:048
281909399320,29cyclictest0-21swapper/220:32:418
281909399320,29cyclictest0-21swapper/219:29:528
281909399320,29cyclictest0-21swapper/219:12:318
281909399320,29cyclictest0-21swapper/200:28:258
2819088993230,1cyclictest1774-21snmpd23:22:200
2819088993228,4cyclictest2838955-21mii-tool19:30:150
281908899320,32cyclictest0-21swapper/019:35:590
2819131993130,1cyclictest1774-21snmpd22:10:077
281913199310,30cyclictest0-21swapper/1523:15:167
281913199310,30cyclictest0-21swapper/1519:22:377
281912799310,1cyclictest0-21swapper/1419:21:406
2819125993130,1cyclictest1774-21snmpd23:39:365
281912599310,30cyclictest0-21swapper/1319:25:285
2819116993130,1cyclictest3086619-21kworker/10:2+events23:44:252
2819116993130,1cyclictest2964616-21kworker/10:1+events23:16:142
2819116993130,1cyclictest2964616-21kworker/10:1+events23:02:222
2819116993130,1cyclictest2964616-21kworker/10:1+events23:02:212
2819116993130,1cyclictest2964616-21kworker/10:1+events22:14:572
2819116993130,1cyclictest2964616-21kworker/10:1+events21:46:362
2819116993130,1cyclictest2886812-21kworker/10:0+events21:14:432
2819116993130,1cyclictest2805912-21kworker/10:2+events19:18:112
2819116993130,1cyclictest1774-21snmpd21:52:512
2819116993130,1cyclictest1774-21snmpd19:38:442
2819116993129,1cyclictest2886812-21kworker/10:0+events21:03:112
2819116993129,1cyclictest2805912-21kworker/10:2+events19:28:432
281910999310,30cyclictest0-21swapper/700:36:5213
281910199317,24cyclictest2919078-21kworker/u32:4+events_unbound21:40:1511
2819101993130,1cyclictest3027804-21kworker/u32:1+events_unbound23:29:2211
2819101993130,1cyclictest1774-21snmpd00:23:3311
281910199310,31cyclictest618598-21thunderbird00:29:3411
2819099993129,2cyclictest3137313-21kworker/u32:4+events_unbound00:06:0610
281909999310,30cyclictest0-21swapper/421:07:1610
281909599310,1cyclictest0-21swapper/320:40:589
2819093993129,2cyclictest618598-21thunderbird00:06:038
2819093993128,3cyclictest618698-21WRScene~ilder#121:23:508
2819093993127,1cyclictest618598-21thunderbird21:48:398
281909399310,29cyclictest618700-21WRRende~ckend#100:12:588
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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