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2026-04-08 - 19:45

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 Wed Apr 08, 2026 00:46:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40140242422403,12sleep100-21swapper/1019:06:502
40140242422403,12sleep100-21swapper/1019:06:492
40141022394374,13sleep40-21swapper/419:07:4810
40141022394374,13sleep40-21swapper/419:07:4810
40141922386367,12sleep80-21swapper/819:08:5714
40141922386367,12sleep80-21swapper/819:08:5614
40140472371364,4sleep130-21swapper/1319:07:095
40140472371364,4sleep130-21swapper/1319:07:085
40107822371326,14sleep150-21swapper/1519:05:027
40107822371326,14sleep150-21swapper/1519:05:027
40142472370362,5sleep90-21swapper/919:09:3015
40142472370362,5sleep90-21swapper/919:09:2915
40139742367347,13sleep70-21swapper/719:06:1513
40139742367347,13sleep70-21swapper/719:06:1413
40140202365324,14sleep60-21swapper/619:06:4612
40140202365324,14sleep60-21swapper/619:06:4512
40142612363341,14sleep10-21swapper/119:09:381
40142612363341,14sleep10-21swapper/119:09:371
40140192353333,13sleep50-21swapper/519:06:4511
40140192353333,13sleep50-21swapper/519:06:4411
40142842352310,14sleep110-21swapper/1119:09:473
40142842352310,14sleep110-21swapper/1119:09:473
40139692351331,14sleep20-21swapper/219:06:108
40139692351331,14sleep20-21swapper/219:06:098
40141012350330,13sleep30-21swapper/319:07:489
40141012350330,13sleep30-21swapper/319:07:479
40140982350330,13sleep00-21swapper/019:07:440
40140982350330,13sleep00-21swapper/019:07:440
40141502349330,12sleep140-21swapper/1419:08:316
40141502349330,12sleep140-21swapper/1419:08:306
40142532348328,13sleep120-21swapper/1219:09:334
40142532348328,13sleep120-21swapper/1219:09:324
41291972560,0sleep140-21swapper/1421:19:536
4014681994745,1cyclictest0-21swapper/319:50:139
401468899360,1cyclictest0-21swapper/623:36:2012
4014681993636,0cyclictest0-21swapper/300:38:539
4014698993534,1cyclictest109844-21kworker/u32:1+events_unbound23:35:162
4014681993533,0cyclictest211rcu_preempt22:51:319
401471299340,1cyclictest0-21swapper/1500:00:157
4014688993424,3cyclictest1774-21snmpd22:19:1612
4014688993424,3cyclictest1774-21snmpd22:19:1512
4014701993333,0cyclictest0-21swapper/1123:27:513
4014698993332,1cyclictest4008570-21kworker/u32:0+flush-259:019:15:012
4014698993332,1cyclictest4008570-21kworker/u32:0+flush-259:019:15:012
4014681993332,1cyclictest511ktimers/320:06:179
401471299320,31cyclictest0-21swapper/1521:50:127
401471099320,29cyclictest0-21swapper/1420:35:146
4014706993229,3cyclictest1774-21snmpd22:25:365
4014701993232,0cyclictest0-21swapper/1123:50:033
4014701993231,1cyclictest4017124-21kworker/u32:2+flush-259:019:30:173
4014698993227,1cyclictest69651-21kworker/10:2+events00:25:562
4014689993228,4cyclictest145631-21ethtool00:00:1513
4014689993227,5cyclictest4170505-21ethtool21:50:1213
4014712993128,3cyclictest1774-21snmpd22:36:077
4014710993130,1cyclictest1774-21snmpd00:27:336
401471099310,30cyclictest0-21swapper/1423:07:026
401471099310,30cyclictest0-21swapper/1422:06:026
4014701993131,0cyclictest0-21swapper/1122:42:373
4014701993130,1cyclictest1774-21snmpd21:24:013
4014698993131,0cyclictest69651-21kworker/10:2+events00:22:172
4014698993130,1cyclictest97294-21kworker/u32:0+events_unbound00:05:162
4014698993130,1cyclictest4151405-21kworker/10:2+events22:38:452
4014698993130,1cyclictest4151405-21kworker/10:2+events21:39:432
4014698993130,1cyclictest37725-21kworker/10:0+events22:40:212
4014698993130,0cyclictest69651-21kworker/10:2+events23:17:562
4014698993130,0cyclictest4110555-21kworker/10:1+events21:16:222
4014698993129,1cyclictest69651-21kworker/10:2+events23:11:322
4014698993127,0cyclictest4081228-21kworker/10:0+events20:45:202
4014698993126,1cyclictest4151405-21kworker/10:2+events21:53:262
401469899310,30cyclictest0-21swapper/1019:45:142
4014694993130,1cyclictest1774-21snmpd20:34:2015
4014694993129,1cyclictest1774-21snmpd22:45:3115
401469499310,1cyclictest0-21swapper/921:10:1915
401469199310,30cyclictest0-21swapper/819:51:3514
401468899310,30cyclictest0-21swapper/623:06:2612
4014683993130,1cyclictest1774-21snmpd22:21:4310
4014683993130,1cyclictest1774-21snmpd22:21:4210
401468399310,30cyclictest0-21swapper/419:38:5310
4014681993130,1cyclictest1774-21snmpd22:48:399
401467799310,30cyclictest0-21swapper/221:58:248
401467799310,30cyclictest0-21swapper/221:05:168
401467499310,30cyclictest0-21swapper/120:50:161
4014671993129,1cyclictest1774-21snmpd00:35:260
401467199310,28cyclictest0-21swapper/021:10:160
4014712993029,1cyclictest1774-21snmpd23:30:507
4014712993029,1cyclictest1774-21snmpd21:44:117
401471299300,29cyclictest0-21swapper/1521:09:407
401471299300,1cyclictest0-21swapper/1519:10:157
401471299300,1cyclictest0-21swapper/1519:10:147
401471099300,30cyclictest0-21swapper/1419:56:146
401471099300,1cyclictest0-21swapper/1421:20:156
401470699300,29cyclictest0-21swapper/1323:59:525
4014704993029,1cyclictest1774-21snmpd23:44:214
4014704993029,1cyclictest1774-21snmpd22:54:284
4014704993029,1cyclictest1774-21snmpd21:59:054
4014701993030,0cyclictest0-21swapper/1100:22:233
4014701993029,1cyclictest1774-21snmpd23:59:283
4014701993029,1cyclictest1774-21snmpd22:47:033
4014701993029,1cyclictest1774-21snmpd20:05:203
4014701993029,1cyclictest126547-21nodev-device-ev23:45:173
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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