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2026-04-19 - 10:44

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 Sun Apr 19, 2026 00:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9729012120106,9sleep20-21swapper/219:09:102
9728802120106,9sleep10-21swapper/119:08:541
9728462119105,9sleep30-21swapper/319:08:233
9726412118104,9sleep40-21swapper/419:05:274
9726932116101,10sleep00-21swapper/019:06:130
9728492114100,9sleep60-21swapper/619:08:266
972810211399,9sleep50-21swapper/519:07:535
972832211197,9sleep70-21swapper/719:08:117
9731789910399,4cyclictest1047013-21cat21:20:160
973206991020,100cyclictest0-21swapper/700:06:107
9731879910298,3cyclictest553-21snmpd21:35:292
97318799102100,2cyclictest553-21snmpd00:36:442
973187991020,99cyclictest0-21swapper/219:20:152
973187991020,100cyclictest0-21swapper/221:48:082
973178991020,101cyclictest0-21swapper/021:07:100
973206991010,101cyclictest0-21swapper/720:01:327
973206991010,0cyclictest0-21swapper/722:15:247
973206991010,0cyclictest0-21swapper/722:15:247
9732039910199,2cyclictest553-21snmpd22:43:466
9732039910199,1cyclictest553-21snmpd23:41:586
9731989910199,2cyclictest553-21snmpd20:21:115
9731959910199,2cyclictest553-21snmpd20:50:484
9731959910198,3cyclictest553-21snmpd22:33:584
9731959910198,3cyclictest553-21snmpd19:37:104
973195991010,101cyclictest0-21swapper/422:10:424
9731879910199,2cyclictest553-21snmpd19:34:292
973187991010,101cyclictest0-21swapper/222:28:072
973187991010,0cyclictest0-21swapper/219:51:042
9731839910199,2cyclictest553-21snmpd22:03:301
9731839910199,2cyclictest553-21snmpd21:48:361
9731839910199,2cyclictest553-21snmpd21:35:051
9731839910199,2cyclictest553-21snmpd21:11:401
973183991010,100cyclictest0-21swapper/123:44:511
973183991010,100cyclictest0-21swapper/122:36:141
9731789910199,2cyclictest553-21snmpd23:33:120
9731789910199,2cyclictest553-21snmpd19:19:420
9731789910199,2cyclictest0-21swapper/022:52:310
9731789910198,3cyclictest553-21snmpd21:52:110
9731789910198,3cyclictest1007676-21cat20:15:130
973178991010,99cyclictest0-21swapper/022:31:070
973178991010,101cyclictest0-21swapper/022:08:330
973178991010,101cyclictest0-21swapper/020:09:140
973178991010,100cyclictest0-21swapper/000:32:140
973206991000,99cyclictest0-21swapper/721:50:297
973206991000,100cyclictest0-21swapper/723:02:207
973206991000,100cyclictest0-21swapper/721:31:407
973206991000,100cyclictest0-21swapper/719:32:137
9732039910099,1cyclictest553-21snmpd22:52:386
9732039910099,1cyclictest553-21snmpd22:00:036
9732039910099,1cyclictest553-21snmpd21:53:356
9732039910099,1cyclictest553-21snmpd21:48:026
9732039910099,1cyclictest553-21snmpd19:26:096
9732039910099,1cyclictest553-21snmpd00:20:026
973203991000,99cyclictest0-21swapper/622:48:436
973203991000,99cyclictest0-21swapper/621:08:026
973203991000,99cyclictest0-21swapper/620:19:276
973203991000,1cyclictest0-21swapper/621:55:446
973203991000,100cyclictest0-21swapper/623:38:396
9731989910099,1cyclictest553-21snmpd21:05:045
9731989910099,1cyclictest553-21snmpd20:44:495
9731989910099,1cyclictest553-21snmpd20:05:235
9731989910098,2cyclictest0-21swapper/500:30:365
9731989910097,3cyclictest553-21snmpd21:51:295
973198991000,99cyclictest0-21swapper/522:32:315
973198991000,99cyclictest0-21swapper/522:01:485
973198991000,99cyclictest0-21swapper/521:56:275
973198991000,99cyclictest0-21swapper/520:27:205
973198991000,100cyclictest0-21swapper/522:28:045
973198991000,100cyclictest0-21swapper/520:54:155
973198991000,100cyclictest0-21swapper/519:20:035
9731959910099,1cyclictest553-21snmpd22:19:524
9731959910099,1cyclictest553-21snmpd22:19:514
9731959910099,1cyclictest553-21snmpd20:57:274
9731959910099,1cyclictest553-21snmpd20:02:174
9731959910099,1cyclictest553-21snmpd19:22:214
9731959910099,1cyclictest553-21snmpd00:24:024
9731959910098,1cyclictest553-21snmpd21:39:114
9731959910097,3cyclictest553-21snmpd00:28:484
973195991000,1cyclictest0-21swapper/423:26:394
973195991000,100cyclictest0-21swapper/422:25:394
973195991000,100cyclictest0-21swapper/421:02:464
973195991000,100cyclictest0-21swapper/420:35:244
973195991000,100cyclictest0-21swapper/419:53:584
9731929910099,1cyclictest553-21snmpd20:55:333
9731929910099,1cyclictest553-21snmpd19:31:013
9731929910099,1cyclictest553-21snmpd19:12:403
9731879910099,1cyclictest553-21snmpd23:02:322
9731879910099,1cyclictest553-21snmpd21:13:072
9731879910099,1cyclictest553-21snmpd21:04:392
9731879910099,1cyclictest553-21snmpd20:01:022
9731879910099,1cyclictest1041440-21cat21:15:142
9731879910098,2cyclictest553-21snmpd20:42:062
9731879910098,2cyclictest553-21snmpd00:07:162
973187991000,100cyclictest0-21swapper/223:56:202
973187991000,100cyclictest0-21swapper/222:30:132
973187991000,100cyclictest0-21swapper/219:47:012
973187991000,100cyclictest0-21swapper/219:27:342
9731839910099,1cyclictest553-21snmpd22:40:461
9731839910099,1cyclictest553-21snmpd22:26:541
9731839910099,1cyclictest553-21snmpd21:26:281
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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