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2026-06-09 - 13:42

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 Jun 09, 2026 00:46:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
15945992394373,14sleep140-21swapper/1419:08:246
15947172386367,12sleep100-21swapper/1019:09:562
15945962371331,13sleep110-21swapper/1119:08:213
15944142371333,13sleep70-21swapper/719:06:0913
15912342367359,5sleep120-21swapper/1219:05:094
15946482360343,11sleep50-21swapper/519:09:0311
15945752357348,6sleep150-21swapper/1519:08:107
15945862354333,13sleep30-21swapper/319:08:139
15945982352332,13sleep130-21swapper/1319:08:235
15944602352331,14sleep20-21swapper/219:06:358
15945842349330,12sleep10-21swapper/119:08:121
15943932349312,13sleep90-21swapper/919:05:5415
15944832348329,12sleep60-21swapper/619:06:5512
15924312348329,13sleep40-21swapper/419:05:1710
15944462347327,13sleep80-21swapper/819:06:2514
15946022343322,14sleep00-21swapper/019:08:270
1595182993528,7cyclictest1904711-21kworker/u32:0+flush-259:000:09:3014
1595182993434,0cyclictest0-21swapper/822:30:3114
1595196993332,1cyclictest1321ktimers/1200:09:294
1595182993332,1cyclictest1688683-21kworker/u32:2+events_unbound23:05:1814
1595182993331,2cyclictest961ktimers/822:19:3414
159516499333,27cyclictest1598723-21kworker/u32:5+events_unbound20:00:118
1595164993328,4cyclictest1718060-21cat21:25:148
1595196993232,0cyclictest0-21swapper/1223:53:444
1595196993232,0cyclictest0-21swapper/1223:05:234
1595196993232,0cyclictest0-21swapper/1221:11:524
1595187993229,3cyclictest0-21swapper/1021:25:142
1595187993229,2cyclictest1752586-21kworker/10:2+events22:24:472
1595182993232,0cyclictest0-21swapper/823:42:2914
1595182993232,0cyclictest0-21swapper/821:17:2614
1595182993232,0cyclictest0-21swapper/800:27:1114
1595182993231,1cyclictest1644620-21kworker/u32:1+flush-259:020:15:1814
159517499320,31cyclictest0-21swapper/523:40:5811
159515999320,29cyclictest0-21swapper/021:25:130
159515999320,29cyclictest0-21swapper/019:35:150
159520799310,30cyclictest0-21swapper/1500:15:147
1595196993131,0cyclictest0-21swapper/1223:42:304
1595196993131,0cyclictest0-21swapper/1223:03:594
1595196993130,0cyclictest211rcu_preempt22:44:554
159519199310,30cyclictest0-21swapper/1122:36:533
1595187993130,1cyclictest1752586-21kworker/10:2+events22:57:272
1595187993130,1cyclictest1752586-21kworker/10:2+events21:54:182
1595187993130,1cyclictest1752586-21kworker/10:2+events21:54:172
1595187993129,1cyclictest1951573-21kworker/10:0+events00:30:162
1595187993129,1cyclictest1899540-21kworker/10:2+events00:08:362
1595187993129,1cyclictest1854907-21kworker/10:0+events23:23:582
1595187993129,1cyclictest1837431-21kworker/10:1+events23:07:502
1595187993129,1cyclictest1752586-21kworker/10:2+events22:32:512
1595187993129,1cyclictest1752586-21kworker/10:2+events21:59:532
1595187993129,1cyclictest1718403-21kworker/10:0+events21:45:542
1595187993129,1cyclictest1718403-21kworker/10:0+events21:45:542
1595187993129,1cyclictest1459180-21kworker/10:0+events20:48:452
1595187993129,1cyclictest1459180-21kworker/10:0+events20:14:102
1595187993129,1cyclictest1459180-21kworker/10:0+events20:02:092
1595187993129,1cyclictest1459180-21kworker/10:0+events19:52:452
1595187993129,1cyclictest1459180-21kworker/10:0+events19:48:002
1595187993129,1cyclictest1459180-21kworker/10:0+events19:13:552
159518799310,30cyclictest0-21swapper/1020:16:422
1595182993131,0cyclictest0-21swapper/822:27:0614
1595182993131,0cyclictest0-21swapper/822:20:3714
1595182993131,0cyclictest0-21swapper/821:48:3214
1595182993131,0cyclictest0-21swapper/821:48:3114
1595182993131,0cyclictest0-21swapper/820:47:1914
1595182993131,0cyclictest0-21swapper/819:10:0714
1595182993124,4cyclictest0-21swapper/819:53:2914
159518099310,30cyclictest0-21swapper/700:04:0413
159517099310,30cyclictest0-21swapper/419:39:4610
159517099310,30cyclictest0-21swapper/400:01:5410
1595167993129,1cyclictest1774-21snmpd23:09:339
1595164993128,3cyclictest1727220-21ssh21:32:358
1595164993127,4cyclictest1774-21snmpd19:10:038
1595207993029,1cyclictest1774-21snmpd22:00:517
1595207993029,1cyclictest1774-21snmpd20:24:017
1595207993029,1cyclictest0-21swapper/1523:57:037
1595207993028,2cyclictest1640408-21kworker/u32:0+events_unbound21:15:177
159520799300,29cyclictest0-21swapper/1520:34:347
159520799300,1cyclictest0-21swapper/1523:37:497
159520799300,1cyclictest0-21swapper/1523:22:127
159520799300,1cyclictest0-21swapper/1520:44:557
159520799300,1cyclictest0-21swapper/1500:13:197
1595205993029,1cyclictest1774-21snmpd22:24:306
1595205993029,1cyclictest0-21swapper/1423:21:126
1595205993029,1cyclictest0-21swapper/1423:16:026
1595200993029,1cyclictest1774-21snmpd22:48:225
1595200993029,1cyclictest1774-21snmpd19:58:115
159520099300,1cyclictest0-21swapper/1321:59:425
1595196993030,0cyclictest0-21swapper/1223:58:314
1595196993030,0cyclictest0-21swapper/1222:30:314
1595196993030,0cyclictest0-21swapper/1200:11:424
1595196993029,1cyclictest1774-21snmpd22:57:524
1595196993029,1cyclictest1774-21snmpd19:17:244
159519699300,30cyclictest1321ktimers/1222:52:424
159519699300,30cyclictest0-21swapper/1221:02:084
159519699300,1cyclictest0-21swapper/1221:59:394
159519699300,1cyclictest0-21swapper/1219:10:404
1595191993029,1cyclictest1774-21snmpd20:38:033
159519199300,30cyclictest0-21swapper/1119:11:523
159519199300,29cyclictest0-21swapper/1119:50:223
1595187993030,0cyclictest1899540-21kworker/10:2+events23:56:002
1595187993030,0cyclictest1882456-21kworker/10:1+events23:44:342
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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