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2025-12-21 - 08:39

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 Dec 21, 2025 00:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
25631292127112,10sleep30-21swapper/319:05:323
25633462126111,10sleep50-21swapper/519:08:395
25632472126112,9sleep00-21swapper/019:07:140
25631192122107,10sleep20-21swapper/219:05:232
25634352121106,9sleep10-21swapper/119:09:551
25632342121107,9sleep70-21swapper/719:07:067
25632332121107,9sleep60-21swapper/619:07:046
25632312119105,9sleep40-21swapper/419:07:024
25636919910299,3cyclictest556-21snmpd21:00:346
2563691991020,0cyclictest0-21swapper/622:50:176
2563683991020,102cyclictest0-21swapper/423:47:294
2563683991020,101cyclictest0-21swapper/422:31:584
2563683991020,0cyclictest0-21swapper/419:25:314
25636799910298,3cyclictest556-21snmpd22:22:433
25636759910298,4cyclictest556-21snmpd22:59:112
2563671991020,102cyclictest0-21swapper/123:10:141
2563696991010,100cyclictest0-21swapper/723:07:327
25636919910198,3cyclictest556-21snmpd23:31:516
2563691991010,0cyclictest0-21swapper/623:06:386
2563691991010,0cyclictest0-21swapper/620:52:216
25636879910199,2cyclictest556-21snmpd22:04:275
256368799101100,1cyclictest556-21snmpd23:52:525
25636839910199,1cyclictest556-21snmpd00:04:464
25636839910198,3cyclictest556-21snmpd19:44:254
2563683991010,101cyclictest0-21swapper/420:20:474
2563683991010,0cyclictest0-21swapper/422:17:124
25636799910199,2cyclictest556-21snmpd21:19:043
25636799910199,2cyclictest556-21snmpd20:59:313
25636799910199,2cyclictest556-21snmpd20:41:333
25636799910199,2cyclictest556-21snmpd20:41:333
25636799910199,2cyclictest556-21snmpd19:11:513
25636799910198,3cyclictest556-21snmpd20:50:183
25636759910199,2cyclictest556-21snmpd23:06:112
25636759910198,3cyclictest556-21snmpd22:10:002
2563675991010,101cyclictest0-21swapper/220:00:562
25636719910199,2cyclictest556-21snmpd00:14:251
25636719910198,3cyclictest556-21snmpd23:28:301
25636719910197,4cyclictest556-21snmpd20:53:191
2563671991010,99cyclictest0-21swapper/121:13:281
2563671991010,0cyclictest0-21swapper/122:07:451
25636689910199,2cyclictest556-21snmpd19:15:010
2563668991010,100cyclictest0-21swapper/023:30:090
2563668991010,100cyclictest0-21swapper/021:45:230
2563668991010,100cyclictest0-21swapper/021:29:290
2563668991010,100cyclictest0-21swapper/000:24:060
2563696991000,99cyclictest0-21swapper/721:32:267
2563696991000,99cyclictest0-21swapper/720:57:257
2563696991000,99cyclictest0-21swapper/720:41:217
2563696991000,99cyclictest0-21swapper/720:41:217
2563696991000,99cyclictest0-21swapper/720:17:237
2563696991000,99cyclictest0-21swapper/720:10:207
2563696991000,99cyclictest0-21swapper/700:30:327
2563696991000,100cyclictest0-21swapper/723:37:427
2563696991000,100cyclictest0-21swapper/722:48:317
2563696991000,100cyclictest0-21swapper/719:14:397
2563696991000,100cyclictest0-21swapper/700:19:087
25636919910099,1cyclictest556-21snmpd20:49:516
25636919910099,1cyclictest2811861-21cat00:10:166
25636919910098,2cyclictest556-21snmpd21:34:146
25636919910097,3cyclictest556-21snmpd20:06:266
2563691991000,99cyclictest0-21swapper/623:04:266
2563691991000,99cyclictest0-21swapper/621:43:386
2563691991000,99cyclictest0-21swapper/621:06:166
25636879910099,1cyclictest556-21snmpd23:35:515
25636879910099,1cyclictest556-21snmpd23:22:585
25636879910099,1cyclictest556-21snmpd19:34:385
25636879910098,2cyclictest556-21snmpd23:45:305
25636879910098,2cyclictest556-21snmpd22:25:435
25636879910098,1cyclictest556-21snmpd19:53:015
2563687991000,99cyclictest0-21swapper/522:54:055
2563687991000,1cyclictest0-21swapper/523:25:125
25636839910099,1cyclictest556-21snmpd22:02:394
25636839910099,1cyclictest556-21snmpd21:50:174
25636839910099,1cyclictest556-21snmpd20:15:384
25636839910099,1cyclictest556-21snmpd19:49:464
25636839910097,3cyclictest2575806-21cat19:30:164
2563683991000,99cyclictest0-21swapper/422:51:294
2563683991000,99cyclictest0-21swapper/419:11:154
2563683991000,100cyclictest0-21swapper/423:42:484
2563683991000,0cyclictest0-21swapper/419:51:524
25636799910099,1cyclictest556-21snmpd23:33:573
25636799910099,1cyclictest556-21snmpd23:03:083
25636799910099,1cyclictest556-21snmpd20:45:183
25636799910099,1cyclictest556-21snmpd20:18:443
25636799910098,2cyclictest556-21snmpd23:19:483
25636799910098,2cyclictest556-21snmpd21:53:573
25636759910099,1cyclictest556-21snmpd23:41:102
25636759910099,1cyclictest556-21snmpd21:44:512
25636759910094,3cyclictest556-21snmpd21:26:382
2563675991000,100cyclictest0-21swapper/221:56:542
25636719910098,2cyclictest556-21snmpd21:49:201
25636719910098,2cyclictest556-21snmpd20:55:121
2563671991000,99cyclictest0-21swapper/123:58:161
2563671991000,99cyclictest0-21swapper/122:30:461
2563671991000,99cyclictest0-21swapper/120:35:161
2563671991000,99cyclictest0-21swapper/119:46:371
2563671991000,99cyclictest0-21swapper/100:00:171
2563671991000,100cyclictest0-21swapper/122:23:521
2563671991000,100cyclictest0-21swapper/121:42:561
25636689910099,1cyclictest556-21snmpd22:59:530
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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