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2026-08-25 - 14:53

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 Aug 25, 2026 00:45:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
37124862419399,13sleep50-21swapper/519:09:2911
37124822407363,14sleep10-21swapper/119:09:251
37124902402381,14sleep90-21swapper/919:09:3315
37123982402379,15sleep120-21swapper/1219:08:154
37121532398377,14sleep140-21swapper/1419:05:376
37124702353342,7sleep70-21swapper/719:09:1413
37121542353333,13sleep150-21swapper/1519:05:387
37123222348326,14sleep60-21swapper/619:07:2012
37124772347324,14sleep130-21swapper/1319:09:205
37123202347326,14sleep40-21swapper/419:07:1910
37124612345323,15sleep00-21swapper/019:09:080
37124112344321,15sleep80-21swapper/819:08:2714
37125142343323,13sleep110-21swapper/1119:09:503
37123402343322,14sleep20-21swapper/219:07:348
37122322343322,14sleep30-21swapper/319:06:309
37124132342320,14sleep100-21swapper/1019:08:302
371293099500,25cyclictest0-21swapper/1419:21:326
3712893995049,1cyclictest4043952-21kworker/u32:1+events_unbound00:35:168
3712893994544,1cyclictest4018024-21kworker/u32:4+events_unbound00:05:248
3712890994116,23cyclictest0-21swapper/100:02:321
3712918993736,1cyclictest3881252-21kworker/u32:1+events_unbound23:16:172
3712918993736,1cyclictest3881252-21kworker/u32:1+events_unbound23:16:172
371293099360,25cyclictest0-21swapper/1421:00:236
3712893993433,1cyclictest3891590-21kworker/u32:3+flush-259:022:15:178
3712918993329,1cyclictest3982629-21kworker/10:2+events23:22:202
3712918993329,1cyclictest3982629-21kworker/10:2+events23:22:202
371290899330,31cyclictest0-21swapper/722:40:1413
371289399330,31cyclictest0-21swapper/223:47:028
371289399330,31cyclictest0-21swapper/223:30:228
371289399330,31cyclictest0-21swapper/222:12:408
371289399330,31cyclictest0-21swapper/221:19:348
371289399330,30cyclictest411rcuc/222:09:268
371289399330,30cyclictest1769-21arpwatch20:45:168
3712918993228,1cyclictest4018983-21kworker/10:2+events00:17:562
371289999320,30cyclictest0-21swapper/419:16:4010
3712893993231,1cyclictest4043952-21kworker/u32:1+flush-259:000:28:208
371289399320,32cyclictest0-21swapper/200:24:348
371289399320,31cyclictest0-21swapper/222:20:168
371289399320,31cyclictest0-21swapper/200:16:208
371289399320,30cyclictest0-21swapper/200:02:348
371289399320,29cyclictest0-21swapper/223:55:088
371289399320,29cyclictest0-21swapper/223:15:208
371289399320,29cyclictest0-21swapper/223:15:208
371289399320,29cyclictest0-21swapper/223:06:588
371289399320,29cyclictest0-21swapper/222:48:268
371289399320,29cyclictest0-21swapper/222:36:568
371289399320,29cyclictest0-21swapper/221:43:428
371289399320,29cyclictest0-21swapper/219:10:208
371293099317,14cyclictest0-21swapper/1400:18:056
371293099317,13cyclictest0-21swapper/1423:45:086
371293099317,13cyclictest0-21swapper/1421:22:216
371293099317,13cyclictest0-21swapper/1420:49:246
371293099317,13cyclictest0-21swapper/1420:16:276
3712930993128,2cyclictest1774-21snmpd19:39:436
371293099310,30cyclictest0-21swapper/1423:59:186
371292899310,30cyclictest0-21swapper/1321:00:155
371292899310,30cyclictest0-21swapper/1320:25:125
371292899310,30cyclictest0-21swapper/1319:10:155
3712918993130,1cyclictest4018983-21kworker/10:2+events00:27:472
3712918993130,1cyclictest4018983-21kworker/10:2+events00:12:082
3712918993130,1cyclictest3992593-21kworker/10:0+events23:34:562
3712918993130,1cyclictest3893750-21kworker/10:1+events22:30:262
3712918993130,1cyclictest3893750-21kworker/10:1+events22:28:382
3712918993130,1cyclictest3877861-21kworker/10:0+events22:02:022
3712918993130,1cyclictest3863097-21kworker/10:2+events21:55:322
3712918993130,1cyclictest3863097-21kworker/10:2+events21:54:502
3712918993130,1cyclictest3734303-21kworker/10:2+events20:48:142
3712918993130,1cyclictest3730413-21kworker/u32:1+events_unbound21:35:152
3712918993129,1cyclictest3893750-21kworker/10:1+events22:55:562
3712918993129,1cyclictest3734303-21kworker/10:2+events20:33:202
3712918993129,1cyclictest3734303-21kworker/10:2+events20:05:082
3712918993129,1cyclictest3734303-21kworker/10:2+events20:05:082
3712918993129,1cyclictest3734303-21kworker/10:2+events20:04:022
3712918993129,1cyclictest3734303-21kworker/10:2+events20:04:012
3712918993128,0cyclictest3734303-21kworker/10:2+events19:52:502
371291899310,30cyclictest0-21swapper/1023:55:112
371291899310,30cyclictest0-21swapper/1022:35:142
371291599310,30cyclictest0-21swapper/922:40:0415
371291599310,30cyclictest0-21swapper/919:50:1515
371291399310,30cyclictest0-21swapper/823:37:5714
371291399310,30cyclictest0-21swapper/823:34:4514
3712908993128,2cyclictest3970827-21kworker/u32:3+events_unbound23:25:2213
371290699310,30cyclictest0-21swapper/621:54:4512
3712899993130,1cyclictest1774-21snmpd22:37:4210
3712899993129,1cyclictest1774-21snmpd22:05:4810
371289999310,30cyclictest0-21swapper/423:02:2610
371289799310,30cyclictest0-21swapper/323:46:039
371289799310,30cyclictest0-21swapper/322:12:369
371289799310,30cyclictest0-21swapper/319:21:169
371289799310,30cyclictest0-21swapper/319:19:279
371289399310,30cyclictest0-21swapper/221:11:128
371289399310,28cyclictest0-21swapper/222:56:468
371289399310,28cyclictest0-21swapper/222:00:368
371289399310,28cyclictest0-21swapper/221:55:228
371289399310,0cyclictest0-21swapper/222:27:368
3712890993129,1cyclictest34-21ksoftirqd/121:50:141
371289099310,30cyclictest0-21swapper/122:05:151
371289099310,30cyclictest0-21swapper/121:07:121
371293499300,30cyclictest0-21swapper/1519:34:227
371293099307,13cyclictest0-21swapper/1420:27:256
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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