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2026-10-08 - 03:05

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 Oct 08, 2026 00:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2637234212496,9sleep00-21swapper/019:07:090
2637358212193,23sleep30-21swapper/319:08:563
26373662119105,9sleep20-21swapper/219:09:032
26373232116103,9sleep40-21swapper/419:08:254
26370982116102,9sleep50-21swapper/519:05:215
2637278211498,10sleep60-21swapper/619:07:476
2637170211298,9sleep10-21swapper/119:06:131
2637109211297,10sleep70-21swapper/719:05:237
263784599106100,3cyclictest553-21snmpd19:46:236
26378419910399,4cyclictest553-21snmpd22:18:125
26378419910399,4cyclictest0-21swapper/500:25:425
2637841991030,100cyclictest0-21swapper/521:19:235
26378459910299,3cyclictest553-21snmpd21:33:266
26378459910299,3cyclictest553-21snmpd21:20:116
263784599102100,2cyclictest553-21snmpd22:55:206
2637845991020,100cyclictest0-21swapper/620:06:446
2637841991020,99cyclictest0-21swapper/519:16:435
26378319910299,3cyclictest553-21snmpd20:19:003
26378219910299,3cyclictest553-21snmpd19:34:551
26378169910299,3cyclictest2746354-21cat21:55:120
26378459910199,2cyclictest553-21snmpd23:51:266
26378459910199,2cyclictest553-21snmpd21:03:376
26378459910198,3cyclictest553-21snmpd22:09:436
26378459910198,3cyclictest553-21snmpd22:09:436
26378459910198,3cyclictest553-21snmpd21:28:086
263784599101100,1cyclictest553-21snmpd00:30:486
2637845991010,100cyclictest2699976-21diskmemload00:05:476
2637845991010,100cyclictest0-21swapper/620:49:106
2637845991010,0cyclictest0-21swapper/620:01:296
26378419910199,2cyclictest553-21snmpd21:57:395
26378419910199,2cyclictest553-21snmpd21:36:445
26378419910199,2cyclictest553-21snmpd20:10:505
26378419910199,2cyclictest0-21swapper/523:29:465
2637841991010,99cyclictest0-21swapper/523:33:105
2637834991010,100cyclictest0-21swapper/422:58:244
26378319910199,2cyclictest553-21snmpd22:40:383
26378319910199,2cyclictest553-21snmpd22:39:233
26378319910199,2cyclictest553-21snmpd19:10:123
263783199101100,1cyclictest553-21snmpd19:18:483
26378269910199,2cyclictest553-21snmpd21:13:292
26378269910198,3cyclictest553-21snmpd19:50:142
2637826991010,98cyclictest0-21swapper/222:09:102
2637826991010,98cyclictest0-21swapper/222:09:102
2637826991010,100cyclictest0-21swapper/222:28:222
26378219910199,2cyclictest553-21snmpd21:30:351
2637821991010,101cyclictest0-21swapper/100:14:021
26378169910199,2cyclictest553-21snmpd23:54:470
26378169910199,2cyclictest553-21snmpd19:39:480
26378169910198,3cyclictest553-21snmpd22:35:440
2637816991010,101cyclictest0-21swapper/023:10:030
2637816991010,100cyclictest0-21swapper/023:20:560
2637849991000,99cyclictest0-21swapper/719:52:057
2637849991000,100cyclictest0-21swapper/722:32:057
2637849991000,100cyclictest0-21swapper/722:22:377
2637849991000,100cyclictest0-21swapper/722:01:217
2637849991000,100cyclictest0-21swapper/722:01:207
2637849991000,100cyclictest0-21swapper/721:24:297
2637849991000,100cyclictest0-21swapper/720:18:427
2637849991000,100cyclictest0-21swapper/719:21:317
26378459910099,1cyclictest553-21snmpd23:56:296
26378459910099,1cyclictest553-21snmpd21:18:536
26378459910099,1cyclictest553-21snmpd20:23:216
26378459910099,1cyclictest553-21snmpd19:27:156
26378459910099,1cyclictest553-21snmpd00:00:166
26378459910098,2cyclictest553-21snmpd21:48:246
26378459910098,1cyclictest2751361-21cat22:00:136
26378459910098,1cyclictest2751361-21cat22:00:126
2637845991000,99cyclictest0-21swapper/623:02:576
2637845991000,100cyclictest0-21swapper/623:24:136
2637845991000,100cyclictest0-21swapper/621:12:566
26378419910099,1cyclictest553-21snmpd22:56:245
26378419910099,1cyclictest553-21snmpd20:35:005
26378419910099,1cyclictest1880257-21ntpd23:56:235
26378419910099,1cyclictest0-21swapper/520:49:165
26378419910098,2cyclictest553-21snmpd23:36:135
26378419910098,2cyclictest553-21snmpd19:57:475
26378419910098,2cyclictest0-21swapper/500:19:035
2637841991000,99cyclictest0-21swapper/523:13:425
2637841991000,99cyclictest0-21swapper/522:52:505
2637841991000,99cyclictest0-21swapper/522:28:465
2637841991000,99cyclictest0-21swapper/520:06:415
2637841991000,99cyclictest0-21swapper/519:51:015
2637841991000,100cyclictest0-21swapper/523:40:435
2637841991000,100cyclictest0-21swapper/521:27:235
26378349910099,1cyclictest553-21snmpd23:10:004
26378349910099,1cyclictest553-21snmpd22:41:254
26378349910099,1cyclictest553-21snmpd22:12:524
26378349910099,1cyclictest553-21snmpd19:54:084
26378349910099,1cyclictest553-21snmpd19:45:154
26378349910099,1cyclictest0-21swapper/421:49:484
26378349910098,2cyclictest553-21snmpd22:02:484
26378349910098,2cyclictest553-21snmpd22:02:484
26378349910098,2cyclictest553-21snmpd20:55:374
2637834991000,99cyclictest0-21swapper/423:49:504
2637834991000,99cyclictest0-21swapper/400:35:364
2637834991000,100cyclictest0-21swapper/423:28:554
26378319910099,1cyclictest553-21snmpd21:25:043
26378319910099,1cyclictest553-21snmpd20:53:373
26378319910099,1cyclictest553-21snmpd20:32:503
26378319910099,1cyclictest553-21snmpd19:44:163
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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