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2026-08-30 - 06:39

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #3

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 50 highest latencies:
System rack0slot3s.osadl.org (updated Sun Aug 30, 2026 00:44:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
15594382263215,16sleep00-21swapper/018:53:320
15596532259214,36sleep50-21swapper/518:56:335
15573602257207,18sleep10-21swapper/118:52:091
15596792254210,34sleep40-21swapper/418:56:574
15595912245219,16sleep30-21swapper/318:55:403
15595202242218,16sleep20-21swapper/218:54:412
15593932242218,16sleep70-21swapper/718:52:577
15593692239215,16sleep60-21swapper/618:52:396
15902592930,0sleep50-21swapper/519:49:335
156000499360,35cyclictest0-21swapper/622:07:426
1560008993432,1cyclictest1390-21snmpd00:14:557
1559977993431,2cyclictest1390-21snmpd21:17:521
1559986993332,1cyclictest1418559-21kworker/3:1+events19:28:373
1559982993228,3cyclictest1390-21snmpd23:37:532
1559977993230,2cyclictest0-21swapper/123:58:331
1559991993126,4cyclictest528-21systemd-journal22:36:264
1559991993126,4cyclictest528-21systemd-journal22:36:264
1559977993130,1cyclictest0-21swapper/120:09:341
1559977993130,1cyclictest0-21swapper/120:09:341
1560008993029,1cyclictest0-21swapper/722:02:317
1560008993028,2cyclictest0-21swapper/722:09:457
1559991993029,1cyclictest0-21swapper/423:23:264
155999999296,22cyclictest0-21swapper/519:24:335
1559986992927,1cyclictest0-21swapper/323:02:373
156000899285,22cyclictest0-21swapper/719:34:227
1560008992827,1cyclictest0-21swapper/700:00:217
1559999992827,1cyclictest0-21swapper/520:33:435
1559986992827,1cyclictest0-21swapper/322:07:373
156000899270,25cyclictest0-21swapper/718:59:377
155998299270,25cyclictest0-21swapper/200:14:202
1559977992713,1cyclictest1390-21snmpd00:21:491
1560008992620,4cyclictest1727804-21ntpq00:09:007
1560008992620,4cyclictest1606406-21ntp_states20:20:377
156000899260,22cyclictest0-21swapper/721:27:347
156000499260,24cyclictest0-21swapper/620:41:186
156000499260,22cyclictest0-21swapper/623:24:106
156000499260,22cyclictest0-21swapper/620:04:586
156000499260,22cyclictest0-21swapper/620:04:586
155999999260,24cyclictest0-21swapper/522:15:185
155999999260,22cyclictest0-21swapper/521:54:265
1559991992619,5cyclictest0-21swapper/421:12:284
1559986992622,3cyclictest1390-21snmpd00:01:493
155998699261,1cyclictest0-21swapper/321:22:513
155997799260,24cyclictest0-21swapper/121:48:481
1559973992622,3cyclictest1390-21snmpd00:10:150
155997399260,26cyclictest0-21swapper/020:39:570
155997399260,24cyclictest0-21swapper/021:31:490
1560008992521,3cyclictest1390-21snmpd19:04:027
156000899250,25cyclictest211573-21kworker/7:0+mm_percpu_wq19:13:177
156000899250,23cyclictest0-21swapper/721:58:427
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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