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2026-04-26 - 22:43

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 26, 2026 12:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2256094212293,10sleep20-21swapper/207:09:262
22558782120106,9sleep10-21swapper/107:06:201
22559942115100,10sleep70-21swapper/707:08:037
2256058211499,10sleep60-21swapper/607:08:586
2255913211499,10sleep00-21swapper/007:06:510
2255881211499,10sleep40-21swapper/407:06:234
2255972211399,9sleep30-21swapper/307:07:433
2255974210894,9sleep50-21swapper/507:07:455
22563919910299,3cyclictest553-21snmpd11:29:486
22563869910299,3cyclictest553-21snmpd11:19:175
22563869910299,3cyclictest553-21snmpd10:38:435
22563869910299,3cyclictest553-21snmpd08:41:175
22563869910299,3cyclictest553-21snmpd08:27:505
2256386991020,99cyclictest2379715-21ssh10:04:485
2256386991020,100cyclictest0-21swapper/509:21:195
22563659910299,2cyclictest553-21snmpd12:10:550
225639499101100,1cyclictest0-21swapper/708:20:207
2256394991010,100cyclictest0-21swapper/708:00:587
22563919910199,2cyclictest553-21snmpd11:32:546
22563919910199,2cyclictest553-21snmpd10:41:466
22563919910199,2cyclictest553-21snmpd09:30:036
22563919910199,2cyclictest553-21snmpd09:27:256
22563919910199,2cyclictest553-21snmpd09:21:226
22563919910199,2cyclictest553-21snmpd07:17:326
22563919910199,1cyclictest553-21snmpd11:53:556
2256391991010,101cyclictest0-21swapper/610:26:186
2256386991010,101cyclictest0-21swapper/510:06:485
2256386991010,101cyclictest0-21swapper/509:40:535
2256386991010,101cyclictest0-21swapper/508:49:515
2256386991010,100cyclictest0-21swapper/509:35:475
2256386991010,100cyclictest0-21swapper/508:58:005
2256386991010,100cyclictest0-21swapper/508:05:555
2256386991010,100cyclictest0-21swapper/507:27:485
22563829910199,2cyclictest553-21snmpd09:50:554
22563829910199,2cyclictest553-21snmpd09:42:234
2256382991010,100cyclictest0-21swapper/412:22:384
2256382991010,100cyclictest0-21swapper/408:13:494
22563789910199,2cyclictest553-21snmpd12:12:463
22563749910199,2cyclictest553-21snmpd12:22:282
2256369991010,100cyclictest0-21swapper/111:55:341
2256369991010,100cyclictest0-21swapper/109:13:281
22563659910199,2cyclictest553-21snmpd12:28:410
22563949910099,1cyclictest0-21swapper/709:46:357
22563949910099,1cyclictest0-21swapper/708:29:357
2256394991000,99cyclictest0-21swapper/711:24:157
2256394991000,99cyclictest0-21swapper/707:19:027
2256394991000,100cyclictest0-21swapper/710:31:137
2256394991000,100cyclictest0-21swapper/707:50:217
22563919910099,1cyclictest553-21snmpd10:56:476
22563919910099,1cyclictest553-21snmpd10:02:206
22563919910099,1cyclictest553-21snmpd08:22:386
22563919910099,1cyclictest553-21snmpd08:07:316
22563919910099,1cyclictest553-21snmpd07:35:306
22563919910099,0cyclictest553-21snmpd12:35:506
22563919910097,3cyclictest553-21snmpd07:12:566
22563919910097,3cyclictest2370079-21cat09:55:146
22563919910097,3cyclictest2370079-21cat09:55:136
2256391991000,100cyclictest0-21swapper/609:01:066
2256391991000,100cyclictest0-21swapper/608:50:516
22563869910099,1cyclictest553-21snmpd11:35:445
22563869910099,1cyclictest553-21snmpd08:53:185
22563869910098,2cyclictest553-21snmpd10:24:215
22563869910098,2cyclictest553-21snmpd09:26:015
2256386991000,100cyclictest0-21swapper/510:32:435
22563829910099,1cyclictest553-21snmpd12:31:054
22563829910099,1cyclictest553-21snmpd12:11:344
22563829910099,1cyclictest553-21snmpd11:40:274
22563829910099,1cyclictest553-21snmpd10:17:364
22563829910099,1cyclictest553-21snmpd09:56:084
22563829910099,1cyclictest553-21snmpd09:56:074
22563829910099,1cyclictest553-21snmpd09:04:234
22563829910099,1cyclictest553-21snmpd08:15:254
2256382991000,100cyclictest0-21swapper/411:12:084
2256382991000,100cyclictest0-21swapper/409:10:224
22563789910099,1cyclictest553-21snmpd12:07:433
22563789910099,1cyclictest553-21snmpd11:41:123
22563789910099,1cyclictest553-21snmpd10:37:483
22563789910099,1cyclictest553-21snmpd09:14:193
22563789910099,1cyclictest553-21snmpd07:48:033
22563789910098,1cyclictest553-21snmpd08:37:383
22563749910099,1cyclictest553-21snmpd09:52:372
22563749910099,1cyclictest553-21snmpd08:44:092
22563749910099,1cyclictest553-21snmpd07:55:222
22563749910099,1cyclictest2293706-21cat08:20:152
22563749910098,1cyclictest0-21swapper/211:20:162
2256374991000,99cyclictest0-21swapper/210:43:042
2256374991000,99cyclictest0-21swapper/209:17:312
2256369991000,99cyclictest0-21swapper/111:43:121
2256369991000,99cyclictest0-21swapper/111:11:321
2256369991000,99cyclictest0-21swapper/109:43:051
2256369991000,99cyclictest0-21swapper/107:29:391
2256369991000,100cyclictest0-21swapper/110:50:161
2256369991000,100cyclictest0-21swapper/110:45:461
2256369991000,100cyclictest0-21swapper/110:34:541
2256369991000,100cyclictest0-21swapper/108:42:501
2256369991000,100cyclictest0-21swapper/107:34:001
22563659910099,1cyclictest553-21snmpd10:57:370
22563659910099,1cyclictest553-21snmpd10:46:040
22563659910099,1cyclictest553-21snmpd10:28:110
22563659910099,1cyclictest553-21snmpd09:37:500
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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