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2026-05-01 - 00:11

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 Apr 30, 2026 00:46:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16184962361317,14sleep70-21swapper/719:09:3813
16182422358338,13sleep150-21swapper/1519:06:507
16182572357319,13sleep130-21swapper/1319:07:045
16185132356333,16sleep20-21swapper/219:09:518
16181472356320,29sleep10-21swapper/119:05:321
16184782353331,14sleep90-21swapper/919:09:2515
16183382353334,13sleep100-21swapper/1019:08:062
16182182352330,14sleep80-21swapper/819:06:2714
16184162350330,13sleep30-21swapper/319:08:479
16181902350331,12sleep50-21swapper/519:06:0811
16183062349328,14sleep00-21swapper/019:07:400
16150092349330,12sleep40-21swapper/419:05:0310
16184542348328,13sleep120-21swapper/1219:09:124
16182162348329,13sleep60-21swapper/619:06:2412
16150182348329,12sleep110-21swapper/1119:05:103
16182052347326,14sleep140-21swapper/1419:06:166
1618924994342,1cyclictest1656943-21kworker/u32:2+events_unbound21:30:018
1618924994241,1cyclictest0-21swapper/200:02:318
1618933994140,1cyclictest1694561-21kworker/u32:5+flush-259:021:20:1511
1618924994139,0cyclictest0-21swapper/222:52:178
161896199402,25cyclictest0-21swapper/1422:23:446
161896199401,25cyclictest0-21swapper/1423:51:366
161896199401,25cyclictest0-21swapper/1421:28:496
1618933994040,0cyclictest0-21swapper/523:43:0111
1618924994039,1cyclictest1866663-21kworker/u32:3+events_unbound23:33:478
161896199391,25cyclictest0-21swapper/1422:56:416
161896199391,25cyclictest0-21swapper/1421:50:476
1618924993938,1cyclictest0-21swapper/222:12:178
1618924993938,1cyclictest0-21swapper/219:40:158
1618924993910,0cyclictest0-21swapper/223:28:298
1618933993838,0cyclictest0-21swapper/522:01:1911
161892499389,29cyclictest0-21swapper/221:58:078
161892499389,29cyclictest0-21swapper/200:21:288
161892499389,0cyclictest0-21swapper/222:24:238
1618924993837,1cyclictest0-21swapper/221:44:458
1618924993837,1cyclictest0-21swapper/221:44:458
1618924993836,2cyclictest0-21swapper/223:59:298
1618924993836,2cyclictest0-21swapper/223:08:098
161892499380,28cyclictest0-21swapper/200:31:178
1618951993735,0cyclictest211rcu_preempt23:31:333
1618933993737,0cyclictest0-21swapper/523:26:0711
1618933993737,0cyclictest0-21swapper/521:39:1111
1618933993737,0cyclictest0-21swapper/521:39:1111
1618924993736,1cyclictest0-21swapper/220:48:298
1618924993734,3cyclictest0-21swapper/223:23:218
1618924993734,3cyclictest0-21swapper/221:12:238
1618924993726,7cyclictest0-21swapper/220:19:048
1618918993737,0cyclictest1656943-21kworker/u32:2+flush-259:021:20:150
1618933993636,0cyclictest0-21swapper/500:25:4311
1618933993635,1cyclictest0-21swapper/521:49:5111
1618933993635,1cyclictest0-21swapper/521:49:5111
161892499367,0cyclictest0-21swapper/223:45:338
161892499367,0cyclictest0-21swapper/222:09:378
161892499367,0cyclictest0-21swapper/200:17:478
1618924993634,2cyclictest0-21swapper/223:00:318
161892499362,0cyclictest211rcu_preempt23:12:358
1618951993535,0cyclictest0-21swapper/1123:53:353
1618951993535,0cyclictest0-21swapper/1123:38:233
1618951993535,0cyclictest0-21swapper/1122:23:113
1618951993535,0cyclictest0-21swapper/1100:31:593
1618938993534,1cyclictest1829114-21kworker/u32:0-writeback22:49:0912
1618933993535,0cyclictest0-21swapper/523:23:5511
1618933993535,0cyclictest0-21swapper/522:26:4111
1618933993535,0cyclictest0-21swapper/522:24:1911
1618933993535,0cyclictest0-21swapper/500:10:1511
1618933993523,8cyclictest0-21swapper/520:19:0511
161892499356,29cyclictest0-21swapper/200:05:538
161892499356,0cyclictest0-21swapper/221:15:098
1618924993534,0cyclictest0-21swapper/222:43:358
161892499353,32cyclictest421ktimers/221:50:398
1618924993533,2cyclictest0-21swapper/219:12:598
1618924993532,3cyclictest0-21swapper/220:11:158
1618924993532,2cyclictest1809089-21kworker/2:0-events22:56:438
161892499352,31cyclictest421ktimers/222:03:278
161892499352,0cyclictest211rcu_preempt21:20:098
161892499350,31cyclictest43-21ksoftirqd/219:33:258
1618918993535,0cyclictest0-21swapper/023:21:570
1618918993535,0cyclictest0-21swapper/021:49:330
1618918993535,0cyclictest0-21swapper/021:49:320
1618918993535,0cyclictest0-21swapper/021:29:570
1618951993434,0cyclictest1787611-21kworker/11:2-events22:09:493
1618951993434,0cyclictest0-21swapper/1100:26:113
1618951993433,1cyclictest1739945-21kworker/11:0-events21:44:513
1618951993433,1cyclictest1739945-21kworker/11:0-events21:44:513
1618951993433,0cyclictest0-21swapper/1100:35:053
1618951993431,3cyclictest0-21swapper/1100:06:133
1618949993433,1cyclictest1596112-21kworker/10:2+events19:10:052
1618938993434,0cyclictest0-21swapper/619:30:2112
161893399345,0cyclictest0-21swapper/522:09:4311
1618933993434,0cyclictest0-21swapper/523:49:5111
1618933993434,0cyclictest0-21swapper/523:07:1911
1618933993434,0cyclictest0-21swapper/521:57:2711
1618933993434,0cyclictest0-21swapper/521:54:5511
1618933993434,0cyclictest0-21swapper/521:27:5711
1618933993434,0cyclictest0-21swapper/519:17:1911
1618933993433,0cyclictest0-21swapper/522:35:1711
161892499345,29cyclictest0-21swapper/221:08:378
161892499345,0cyclictest1554540-21kworker/2:2-events19:15:248
161892499345,0cyclictest0-21swapper/222:39:458
161892499345,0cyclictest0-21swapper/221:35:338
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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