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2026-03-14 - 15:02

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 Sat Mar 14, 2026 00:46:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
20602822406387,13sleep90-21swapper/919:06:5715
20602202405384,14sleep30-21swapper/319:06:199
20604452396389,4sleep70-21swapper/719:09:0513
20601412394374,13sleep150-21swapper/1519:05:437
20604852371363,5sleep80-21swapper/819:09:3714
20602422368316,26sleep00-21swapper/019:06:330
20603912360339,13sleep140-21swapper/1419:08:236
20603872358351,5sleep120-21swapper/1219:08:214
20603022356317,13sleep100-21swapper/1019:07:142
20604142351331,13sleep20-21swapper/219:08:428
20602362350310,32sleep130-21swapper/1319:06:305
20602512349330,12sleep60-21swapper/619:06:3912
20601352348328,13sleep110-21swapper/1119:05:383
20601212345324,14sleep10-21swapper/119:05:291
20602242343322,14sleep50-21swapper/519:06:2211
20602212343324,13sleep40-21swapper/419:06:2110
2060936994643,1cyclictest2281545-21kworker/2:0-mm_percpu_wq00:21:008
2060936994617,29cyclictest2281545-21kworker/2:0-mm_percpu_wq23:03:098
206097399459,11cyclictest0-21swapper/1419:56:296
2060936994542,2cyclictest2281545-21kworker/2:0-events00:28:058
206097399435,25cyclictest0-21swapper/1423:14:126
2060936994342,1cyclictest0-21swapper/221:52:578
2060936994342,0cyclictest0-21swapper/221:31:458
2060973994242,0cyclictest0-21swapper/1422:36:496
2060936994240,2cyclictest2281545-21kworker/2:0-mm_percpu_wq23:11:078
2060936994235,3cyclictest0-21swapper/222:11:528
206093699419,30cyclictest0-21swapper/221:58:288
2060936994140,1cyclictest2247426-21kworker/u32:3+events_unbound22:55:188
206097399404,11cyclictest0-21swapper/1422:52:146
206093699405,1cyclictest211rcu_preempt00:17:518
2060936994038,2cyclictest0-21swapper/223:34:178
2060936994011,29cyclictest0-21swapper/223:23:598
2060936993938,1cyclictest2182898-21kworker/2:2-events21:41:508
2060936993937,2cyclictest0-21swapper/200:08:578
2060936993937,0cyclictest0-21swapper/221:18:208
2060936993937,0cyclictest0-21swapper/220:05:258
2060936993937,0cyclictest0-21swapper/200:01:538
206093699388,29cyclictest0-21swapper/222:09:018
206093699387,1cyclictest0-21swapper/223:19:068
206093699386,29cyclictest0-21swapper/223:05:058
2060936993836,2cyclictest0-21swapper/200:34:318
206093699378,29cyclictest0-21swapper/219:15:148
206093699378,0cyclictest0-21swapper/222:46:128
206093699377,0cyclictest0-21swapper/222:32:158
206093699376,31cyclictest0-21swapper/223:46:518
206093699376,1cyclictest0-21swapper/222:37:098
2060936993734,3cyclictest0-21swapper/222:28:218
2060936993732,3cyclictest0-21swapper/222:17:318
206097399368,27cyclictest0-21swapper/1423:04:466
2060966993635,1cyclictest2060153-21kworker/u32:1+events_unbound19:15:014
206093699367,29cyclictest0-21swapper/222:50:058
206093699367,29cyclictest0-21swapper/222:03:118
206093699365,1cyclictest0-21swapper/223:54:518
206093699365,1cyclictest0-21swapper/223:54:508
2060936993633,3cyclictest2132634-21kworker/u32:4+events_unbound20:34:218
2060936993633,3cyclictest0-21swapper/220:20:578
206093699360,4cyclictest0-21swapper/200:10:238
2060973993535,0cyclictest0-21swapper/1422:12:116
2060973993535,0cyclictest0-21swapper/1420:12:116
206093699356,29cyclictest0-21swapper/220:28:148
206093699356,0cyclictest0-21swapper/223:42:228
2060936993533,2cyclictest0-21swapper/219:50:558
2060936993533,0cyclictest0-21swapper/219:36:488
2060936993532,3cyclictest0-21swapper/220:17:088
2060936993532,0cyclictest0-21swapper/222:44:138
206093699350,31cyclictest0-21swapper/221:03:088
206093699350,31cyclictest0-21swapper/221:03:078
2060973993434,0cyclictest0-21swapper/1422:24:176
2060973993434,0cyclictest0-21swapper/1420:21:006
206093699343,31cyclictest0-21swapper/223:55:358
206093699343,31cyclictest0-21swapper/223:55:358
2060936993433,1cyclictest0-21swapper/220:37:568
2060936993433,0cyclictest0-21swapper/219:34:458
2060936993432,2cyclictest0-21swapper/221:36:238
2060936993432,2cyclictest0-21swapper/220:56:068
2060936993432,2cyclictest0-21swapper/220:56:068
2060936993432,2cyclictest0-21swapper/220:51:108
2060936993432,2cyclictest0-21swapper/220:51:108
2060936993432,2cyclictest0-21swapper/220:43:288
2060936993432,2cyclictest0-21swapper/219:40:058
2060936993432,2cyclictest0-21swapper/200:38:568
2060936993431,1cyclictest2095088-21kworker/2:2-events20:12:308
2060936993430,2cyclictest0-21swapper/222:20:558
206093699342,1cyclictest0-21swapper/221:46:528
206093699341,31cyclictest2095088-21kworker/2:2-events20:03:388
2060934993434,0cyclictest0-21swapper/100:03:591
2060934993433,1cyclictest2085332-21kworker/u32:2+events_unbound19:45:171
206097399338,25cyclictest0-21swapper/1420:18:286
2060973993333,0cyclictest0-21swapper/1420:46:146
206093699334,29cyclictest2050551-21kworker/2:0-events19:10:528
2060936993333,0cyclictest0-21swapper/220:45:018
206093699333,28cyclictest0-21swapper/221:22:538
2060936993332,1cyclictest0-21swapper/219:27:428
2060936993331,2cyclictest43-21ksoftirqd/223:29:298
2060936993331,2cyclictest0-21swapper/219:47:128
2060936993328,3cyclictest2095088-21kworker/2:2-events19:56:218
206093699330,31cyclictest2281545-21kworker/2:0+mm_percpu_wq23:36:238
206093699330,31cyclictest0-21swapper/221:06:228
2060973993232,0cyclictest0-21swapper/1421:51:026
2060973993232,0cyclictest0-21swapper/1420:50:466
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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