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2026-09-02 - 07:16

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 Wed Sep 02, 2026 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
32621592275266,6sleep60-21swapper/618:55:096
32622952266217,17sleep40-21swapper/418:57:064
32620382265218,16sleep20-21swapper/218:53:252
32621782261214,37sleep10-21swapper/118:55:211
32622912258233,16sleep00-21swapper/018:57:010
32621602258217,32sleep70-21swapper/718:55:107
32622602256217,16sleep50-21swapper/518:56:325
32622162248223,16sleep30-21swapper/318:55:563
3262639993430,3cyclictest3314142-21awk20:31:175
3262650993331,1cyclictest1390-21snmpd20:40:237
3262631993230,1cyclictest1390-21snmpd22:52:514
3262650993029,1cyclictest0-21swapper/721:07:367
326261599300,27cyclictest0-21swapper/022:08:140
326262899290,25cyclictest0-21swapper/300:14:483
3262615992821,6cyclictest1390-21snmpd23:41:420
3262628992721,5cyclictest1390-21snmpd19:11:543
326265099260,24cyclictest0-21swapper/722:05:087
3262639992622,3cyclictest3429788-21cat00:09:015
3262639992622,3cyclictest3429788-21cat00:09:005
3262639992622,3cyclictest1390-21snmpd23:45:425
326262899260,22cyclictest0-21swapper/322:58:053
3262624992622,3cyclictest1390-21snmpd20:47:552
326262499260,22cyclictest0-21swapper/223:43:042
326262499260,22cyclictest0-21swapper/223:18:422
3262650992521,3cyclictest1390-21snmpd19:43:547
326265099250,3cyclictest3383658-21find22:41:047
3262646992521,3cyclictest1390-21snmpd20:17:226
3262646992518,5cyclictest0-21swapper/600:24:336
3262639992521,3cyclictest3283886-21cat19:34:155
326263199256,3cyclictest0-21swapper/422:46:044
3262631992521,3cyclictest1390-21snmpd22:06:234
3262628992518,5cyclictest0-21swapper/323:31:303
3262628992518,5cyclictest0-21swapper/323:22:193
3262624992521,3cyclictest1390-21snmpd20:34:442
3262624992521,3cyclictest1390-21snmpd00:09:312
3262624992521,3cyclictest1390-21snmpd00:09:302
3262624992518,5cyclictest0-21swapper/200:02:432
3262619992522,2cyclictest1390-21snmpd19:39:391
3262619992521,3cyclictest1390-21snmpd21:13:221
3262619992521,3cyclictest1390-21snmpd00:36:191
3262615992518,5cyclictest0-21swapper/021:29:020
3262615992518,5cyclictest0-21swapper/020:15:480
326261599250,23cyclictest0-21swapper/023:48:150
326261599250,23cyclictest0-21swapper/022:41:510
326261599250,1cyclictest0-21swapper/021:03:310
326261599250,1cyclictest0-21swapper/020:03:280
326261599250,1cyclictest0-21swapper/019:09:220
326265099240,22cyclictest0-21swapper/700:08:077
326265099240,22cyclictest0-21swapper/700:08:077
3262646992420,3cyclictest1390-21snmpd19:54:426
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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