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2026-05-02 - 20:42

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 Sat May 02, 2026 12:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
6841602129114,10sleep20-21swapper/207:06:282
684127212798,9sleep50-21swapper/507:06:005
684374212191,10sleep30-21swapper/307:09:353
6841092121107,9sleep70-21swapper/707:05:467
684245211989,9sleep40-21swapper/407:07:434
684090211499,10sleep60-21swapper/607:05:296
684132211298,9sleep10-21swapper/107:06:031
684371210792,10sleep00-21swapper/007:09:310
6846329910397,0cyclictest0-21swapper/108:38:281
684655991020,102cyclictest0-21swapper/710:29:077
6846479910299,3cyclictest553-21snmpd12:26:295
6846479910299,3cyclictest553-21snmpd08:12:595
68464599102100,2cyclictest553-21snmpd12:07:384
6846369910299,3cyclictest553-21snmpd11:38:582
6846369910299,3cyclictest553-21snmpd08:00:012
684636991020,102cyclictest0-21swapper/212:22:392
684636991020,0cyclictest0-21swapper/207:28:132
684655991010,100cyclictest0-21swapper/711:36:127
684655991010,100cyclictest0-21swapper/710:50:317
6846529910199,2cyclictest553-21snmpd11:55:046
684652991010,100cyclictest0-21swapper/609:49:396
6846479910199,1cyclictest605-21lldpd09:43:395
6846479910198,3cyclictest553-21snmpd10:57:035
6846479910198,3cyclictest553-21snmpd10:12:285
684647991010,99cyclictest0-21swapper/508:00:155
684647991010,100cyclictest0-21swapper/509:24:415
684645991010,99cyclictest0-21swapper/407:56:384
6846419910199,2cyclictest553-21snmpd12:25:423
6846369910199,2cyclictest825801-21cat10:20:132
6846329910199,2cyclictest0-21swapper/110:54:361
684632991010,100cyclictest872464-21ssh11:01:561
684632991010,0cyclictest0-21swapper/111:48:101
684627991010,100cyclictest0-21swapper/007:15:150
684655991000,99cyclictest0-21swapper/712:37:157
684655991000,99cyclictest0-21swapper/712:06:537
684655991000,99cyclictest0-21swapper/711:59:227
684655991000,99cyclictest0-21swapper/710:08:247
684655991000,100cyclictest0-21swapper/712:11:297
684655991000,100cyclictest0-21swapper/712:00:167
684655991000,100cyclictest0-21swapper/711:12:577
684655991000,100cyclictest0-21swapper/708:32:217
684655991000,100cyclictest0-21swapper/708:25:387
684655991000,100cyclictest0-21swapper/707:48:177
6846529910099,1cyclictest553-21snmpd12:27:416
6846529910099,1cyclictest553-21snmpd11:25:396
6846529910099,1cyclictest553-21snmpd08:25:546
6846529910099,1cyclictest553-21snmpd07:32:046
6846529910098,1cyclictest553-21snmpd12:34:486
6846529910098,1cyclictest553-21snmpd10:28:256
6846529910098,1cyclictest553-21snmpd08:02:356
684652991000,99cyclictest0-21swapper/611:04:426
684652991000,98cyclictest0-21swapper/611:17:536
684652991000,98cyclictest0-21swapper/611:17:536
684652991000,100cyclictest0-21swapper/611:40:196
684652991000,100cyclictest0-21swapper/610:05:036
684652991000,100cyclictest0-21swapper/607:35:166
6846479910099,1cyclictest553-21snmpd12:03:235
6846479910099,1cyclictest553-21snmpd11:47:355
6846479910099,1cyclictest553-21snmpd11:37:575
6846479910099,1cyclictest553-21snmpd09:32:325
6846479910099,1cyclictest553-21snmpd09:19:555
6846479910099,1cyclictest553-21snmpd09:13:495
6846479910099,1cyclictest553-21snmpd08:55:195
6846479910099,1cyclictest553-21snmpd07:46:315
6846479910097,3cyclictest553-21snmpd10:36:265
684647991000,99cyclictest0-21swapper/507:26:425
684647991000,100cyclictest0-21swapper/511:53:015
684647991000,100cyclictest0-21swapper/509:39:145
684647991000,100cyclictest0-21swapper/509:26:025
6846459910099,1cyclictest553-21snmpd12:01:414
6846459910099,1cyclictest553-21snmpd10:02:334
6846459910099,1cyclictest553-21snmpd08:49:284
684645991000,99cyclictest0-21swapper/408:42:004
684645991000,100cyclictest0-21swapper/409:59:544
684645991000,100cyclictest0-21swapper/409:21:384
6846419910099,1cyclictest553-21snmpd12:20:563
6846419910099,1cyclictest553-21snmpd11:51:193
6846419910099,1cyclictest553-21snmpd10:50:073
6846419910099,1cyclictest553-21snmpd10:46:193
6846419910099,1cyclictest553-21snmpd09:52:203
6846369910099,1cyclictest570-21ntpd08:56:572
6846369910099,1cyclictest553-21snmpd11:58:562
6846369910099,1cyclictest553-21snmpd11:07:262
6846369910099,1cyclictest553-21snmpd07:55:322
6846369910099,1cyclictest553-21snmpd07:53:232
6846369910098,2cyclictest553-21snmpd10:14:552
6846369910097,3cyclictest553-21snmpd11:03:562
684636991000,99cyclictest0-21swapper/212:28:212
684636991000,99cyclictest0-21swapper/209:06:072
684636991000,99cyclictest0-21swapper/207:39:002
684636991000,100cyclictest0-21swapper/210:51:352
684636991000,100cyclictest0-21swapper/208:36:272
684636991000,100cyclictest0-21swapper/208:10:022
6846329910099,1cyclictest570-21ntpd11:16:581
6846329910099,1cyclictest570-21ntpd11:16:581
6846329910099,1cyclictest553-21snmpd12:29:091
6846329910099,1cyclictest553-21snmpd12:13:551
6846329910099,1cyclictest553-21snmpd11:44:061
6846329910099,1cyclictest553-21snmpd11:11:421
684632991000,99cyclictest0-21swapper/112:22:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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