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2026-06-09 - 06:08

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 Tue Jun 09, 2026 00:44:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2384029212699,22sleep20-21swapper/219:09:422
23838332121107,9sleep30-21swapper/319:06:543
23838162120106,9sleep40-21swapper/419:06:394
23838472119105,9sleep60-21swapper/619:07:066
2383936211499,10sleep10-21swapper/119:08:211
2383794211499,10sleep00-21swapper/019:06:190
2383808210692,9sleep50-21swapper/519:06:325
2383781210489,9sleep70-21swapper/719:06:107
2384307991020,100cyclictest0-21swapper/721:15:437
238430299102100,2cyclictest0-21swapper/600:12:316
23842949910299,3cyclictest553-21snmpd22:32:004
23842949910299,3cyclictest553-21snmpd22:32:004
23842949910299,3cyclictest553-21snmpd19:55:434
23842909910299,2cyclictest553-21snmpd23:52:003
23842889910299,3cyclictest553-21snmpd22:23:212
23842889910299,3cyclictest553-21snmpd22:23:212
23842889910299,3cyclictest553-21snmpd20:29:052
23842889910299,3cyclictest553-21snmpd20:12:292
2384288991020,99cyclictest0-21swapper/221:54:142
2384288991020,100cyclictest0-21swapper/223:23:202
238427999102100,2cyclictest553-21snmpd22:04:090
238427999102100,2cyclictest553-21snmpd21:05:000
2384279991020,100cyclictest0-21swapper/023:26:050
2384279991020,100cyclictest0-21swapper/020:38:380
2384307991010,100cyclictest0-21swapper/722:41:077
23843029910199,2cyclictest553-21snmpd21:22:226
23843029910197,1cyclictest2619877-21cat23:45:146
2384298991010,100cyclictest0-21swapper/500:33:555
23842949910198,3cyclictest553-21snmpd22:23:004
23842949910198,3cyclictest553-21snmpd22:23:004
23842949910198,2cyclictest553-21snmpd22:27:124
23842949910198,2cyclictest553-21snmpd22:27:124
2384294991010,0cyclictest0-21swapper/422:47:254
23842909910199,2cyclictest553-21snmpd23:46:243
23842909910199,2cyclictest553-21snmpd21:43:023
23842909910198,3cyclictest553-21snmpd00:08:553
23842889910199,2cyclictest553-21snmpd00:18:282
23842889910195,2cyclictest0-21swapper/223:56:302
2384288991010,100cyclictest0-21swapper/223:08:442
2384288991010,100cyclictest0-21swapper/220:46:182
23842839910199,2cyclictest553-21snmpd22:49:191
2384279991010,99cyclictest0-21swapper/020:11:410
2384307991000,99cyclictest0-21swapper/720:59:337
2384307991000,99cyclictest0-21swapper/719:36:247
2384307991000,99cyclictest0-21swapper/719:20:097
2384307991000,100cyclictest0-21swapper/721:30:077
2384307991000,0cyclictest0-21swapper/720:41:487
2384307991000,0cyclictest0-21swapper/719:40:427
23843029910099,1cyclictest553-21snmpd21:38:266
23843029910099,1cyclictest553-21snmpd19:48:226
23843029910099,1cyclictest2642247-21cat00:05:166
23843029910099,1cyclictest2603369-21cat23:30:136
23843029910099,1cyclictest2591148-21kworker/6:223:20:016
2384302991000,99cyclictest0-21swapper/619:29:576
2384302991000,1cyclictest0-21swapper/600:35:346
2384302991000,100cyclictest0-21swapper/622:22:066
2384302991000,100cyclictest0-21swapper/622:22:066
2384302991000,100cyclictest0-21swapper/621:54:326
2384302991000,0cyclictest0-21swapper/622:05:136
23842989910099,1cyclictest553-21snmpd21:08:105
23842989910099,1cyclictest553-21snmpd20:43:125
23842989910099,1cyclictest553-21snmpd20:03:075
23842989910099,1cyclictest553-21snmpd19:39:425
23842989910099,1cyclictest2564809-21cat22:55:145
23842989910098,2cyclictest553-21snmpd00:06:015
238429899100100,0cyclictest553-21snmpd20:45:125
2384298991000,100cyclictest0-21swapper/520:19:445
2384298991000,100cyclictest0-21swapper/519:13:025
23842949910099,1cyclictest553-21snmpd23:20:474
23842949910099,1cyclictest553-21snmpd23:15:114
23842949910099,1cyclictest553-21snmpd20:55:544
23842949910099,1cyclictest553-21snmpd20:36:294
23842949910099,1cyclictest553-21snmpd20:29:294
23842949910098,2cyclictest553-21snmpd23:39:334
2384294991000,100cyclictest0-21swapper/421:19:464
23842909910099,1cyclictest553-21snmpd23:18:593
23842909910099,1cyclictest553-21snmpd22:51:133
23842909910099,1cyclictest553-21snmpd21:58:473
23842909910099,1cyclictest553-21snmpd20:30:443
23842909910099,1cyclictest553-21snmpd20:25:053
23842909910099,1cyclictest553-21snmpd20:20:563
23842909910099,1cyclictest553-21snmpd00:17:223
23842909910099,0cyclictest553-21snmpd23:39:423
23842909910098,2cyclictest553-21snmpd19:14:203
23842889910099,1cyclictest553-21snmpd21:29:342
23842889910099,1cyclictest0-21swapper/223:10:142
23842889910099,1cyclictest0-21swapper/222:06:032
23842889910098,2cyclictest553-21snmpd22:40:012
23842889910097,3cyclictest553-21snmpd20:00:132
23842889910097,3cyclictest2619892-21cat23:45:152
2384288991000,99cyclictest2556237-21ssh22:47:222
2384288991000,100cyclictest0-21swapper/220:05:222
23842839910099,1cyclictest553-21snmpd23:01:201
23842839910099,1cyclictest553-21snmpd22:34:311
23842839910099,1cyclictest553-21snmpd22:34:311
23842839910099,1cyclictest553-21snmpd21:17:551
23842839910099,1cyclictest553-21snmpd00:36:431
23842839910099,0cyclictest553-21snmpd19:45:281
2384283991000,99cyclictest0-21swapper/121:46:141
2384283991000,99cyclictest0-21swapper/119:39:301
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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