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2026-04-30 - 18:32

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #8

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 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 rackbslot8s (updated Thu Apr 30, 2026 12:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
122788299277276,1cyclictest0-21swapper/709:53:537
122787899244243,1cyclictest0-21swapper/609:53:516
122785999219218,1cyclictest1337457-21lspci09:53:511
122786299191191,0cyclictest1337313-21lspci09:53:512
122787399165165,0cyclictest0-21swapper/509:53:525
122786599155154,1cyclictest1337457-21lspci09:53:533
12273072130102,9sleep20-21swapper/207:05:242
12273072130102,9sleep20-21swapper/207:05:242
12275692121107,9sleep30-21swapper/307:09:113
12275692121107,9sleep30-21swapper/307:09:103
12275382121107,9sleep10-21swapper/107:08:441
12275382121107,9sleep10-21swapper/107:08:441
12273382120106,9sleep50-21swapper/507:05:525
12273382120106,9sleep50-21swapper/507:05:525
12273692115100,9sleep70-21swapper/707:06:187
12273692115100,9sleep70-21swapper/707:06:187
1227282211499,10sleep40-21swapper/407:05:034
1227282211499,10sleep40-21swapper/407:05:024
1227611211398,10sleep00-21swapper/007:09:480
1227611211398,10sleep00-21swapper/007:09:470
1227478211399,9sleep60-21swapper/607:07:536
1227478211399,9sleep60-21swapper/607:07:536
122787399102100,2cyclictest553-21snmpd11:25:475
1227873991020,102cyclictest0-21swapper/511:10:155
1227873991020,0cyclictest0-21swapper/512:28:475
12278709910299,3cyclictest553-21snmpd12:28:144
122787099102100,2cyclictest553-21snmpd07:24:574
12278659910299,2cyclictest553-21snmpd10:28:573
122786599102100,2cyclictest553-21snmpd12:16:143
1227882991010,99cyclictest0-21swapper/709:38:057
1227882991010,0cyclictest0-21swapper/710:40:097
12278789910199,2cyclictest553-21snmpd11:11:206
1227878991010,100cyclictest0-21swapper/609:47:346
1227878991010,100cyclictest0-21swapper/608:03:036
12278739910198,3cyclictest553-21snmpd10:54:535
1227873991010,100cyclictest0-21swapper/512:01:255
12278709910199,2cyclictest553-21snmpd11:41:304
12278709910199,2cyclictest553-21snmpd10:49:224
12278709910199,2cyclictest553-21snmpd09:39:044
12278709910199,2cyclictest553-21snmpd09:24:554
12278709910199,2cyclictest553-21snmpd08:40:484
12278709910199,2cyclictest553-21snmpd08:05:014
1227870991010,100cyclictest0-21swapper/409:57:364
1227870991010,0cyclictest0-21swapper/410:18:394
12278659910199,2cyclictest553-21snmpd11:28:543
12278659910198,2cyclictest553-21snmpd09:18:193
1227862991010,100cyclictest0-21swapper/210:11:452
122785999101100,1cyclictest553-21snmpd12:07:211
1227859991010,100cyclictest0-21swapper/111:21:421
1227859991010,100cyclictest0-21swapper/111:06:171
1227859991010,100cyclictest0-21swapper/109:56:351
12278549910199,2cyclictest553-21snmpd10:28:070
122785499101100,1cyclictest553-21snmpd09:52:580
12278829910099,1cyclictest0-21swapper/708:20:087
1227882991000,99cyclictest0-21swapper/709:08:287
1227882991000,100cyclictest0-21swapper/711:48:287
1227882991000,100cyclictest0-21swapper/710:39:097
1227882991000,100cyclictest0-21swapper/707:10:027
12278789910099,1cyclictest553-21snmpd11:06:356
12278789910098,2cyclictest553-21snmpd11:42:426
12278789910098,1cyclictest553-21snmpd08:33:196
1227878991000,99cyclictest0-21swapper/607:54:136
1227878991000,1cyclictest0-21swapper/611:45:156
1227878991000,100cyclictest0-21swapper/612:15:516
1227878991000,100cyclictest0-21swapper/610:09:296
1227878991000,100cyclictest0-21swapper/609:04:106
12278739910099,1cyclictest553-21snmpd11:39:305
12278739910099,1cyclictest553-21snmpd09:57:515
12278739910099,1cyclictest553-21snmpd08:42:455
12278739910099,1cyclictest0-21swapper/509:21:285
12278739910098,2cyclictest553-21snmpd11:15:265
12278739910097,3cyclictest553-21snmpd09:34:565
1227873991000,100cyclictest0-21swapper/512:21:445
1227873991000,100cyclictest0-21swapper/507:57:555
1227873991000,100cyclictest0-21swapper/507:33:485
12278709910099,1cyclictest553-21snmpd11:48:484
12278709910099,1cyclictest553-21snmpd11:09:024
12278709910099,1cyclictest553-21snmpd10:38:044
12278709910099,1cyclictest553-21snmpd08:21:044
12278709910099,1cyclictest553-21snmpd08:11:084
12278709910099,1cyclictest553-21snmpd07:32:084
12278709910099,1cyclictest553-21snmpd07:27:034
12278709910098,2cyclictest553-21snmpd11:53:574
12278709910097,3cyclictest553-21snmpd07:41:394
1227870991000,99cyclictest0-21swapper/408:47:384
1227870991000,99cyclictest0-21swapper/408:36:124
1227870991000,1cyclictest0-21swapper/412:13:304
12278659910099,1cyclictest553-21snmpd12:12:543
12278659910099,1cyclictest553-21snmpd11:41:083
12278659910099,1cyclictest553-21snmpd11:08:593
12278659910099,1cyclictest553-21snmpd09:46:383
12278629910099,1cyclictest553-21snmpd10:02:112
12278629910099,1cyclictest553-21snmpd09:05:152
12278629910099,1cyclictest553-21snmpd08:49:472
12278629910099,1cyclictest1281766-21cat08:55:122
1227862991000,99cyclictest0-21swapper/211:55:572
1227862991000,99cyclictest0-21swapper/211:19:132
1227862991000,99cyclictest0-21swapper/211:05:562
1227862991000,99cyclictest0-21swapper/209:31:522
1227862991000,100cyclictest0-21swapper/209:29:492
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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