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2025-09-16 - 13:18

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 Sep 16, 2025 00:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
22447282134110,16sleep60-21swapper/619:07:376
22446662134107,22sleep20-21swapper/219:06:452
22447652131119,7sleep50-21swapper/519:08:085
22448802128114,9sleep70-21swapper/719:09:477
22448082124110,9sleep10-21swapper/119:08:441
22427842122109,8sleep40-21swapper/419:05:104
22446642116102,9sleep00-21swapper/019:06:430
22451519911531,84cyclictest1773482-21kworker/3:021:20:443
22451519911228,84cyclictest1773482-21kworker/3:023:01:003
22451519911128,0cyclictest1773482-21kworker/3:021:10:453
22451519911126,85cyclictest1773482-21kworker/3:022:43:553
22451519911027,0cyclictest1773482-21kworker/3:021:37:043
22451519911025,84cyclictest1773482-21kworker/3:023:49:203
22451519911024,0cyclictest1773482-21kworker/3:023:25:103
2244593211095,10sleep30-21swapper/319:05:413
22451519910926,0cyclictest1773482-21kworker/3:023:50:043
22451519910926,0cyclictest1773482-21kworker/3:000:29:523
22451519910925,84cyclictest1773482-21kworker/3:022:38:563
22451519910925,84cyclictest1773482-21kworker/3:020:55:063
22451519910925,0cyclictest1773482-21kworker/3:021:40:383
22451519910925,0cyclictest1773482-21kworker/3:021:09:203
22451519910925,0cyclictest1773482-21kworker/3:020:12:283
22451519910925,0cyclictest1773482-21kworker/3:000:22:013
22451519910924,84cyclictest1773482-21kworker/3:022:26:503
22451519910924,84cyclictest1773482-21kworker/3:020:33:463
22451519910924,84cyclictest1773482-21kworker/3:019:46:503
22451519910825,0cyclictest1773482-21kworker/3:023:20:103
22451519910825,0cyclictest1773482-21kworker/3:021:31:223
22451519910825,0cyclictest1773482-21kworker/3:021:31:213
22451519910824,84cyclictest1773482-21kworker/3:020:26:403
22451519910824,84cyclictest1773482-21kworker/3:020:01:463
22451519910824,84cyclictest1773482-21kworker/3:019:30:293
22451519910824,0cyclictest1773482-21kworker/3:021:01:303
22451519910824,0cyclictest1773482-21kworker/3:019:24:483
22451519910824,0cyclictest1773482-21kworker/3:000:38:243
22451519910724,0cyclictest1773482-21kworker/3:023:38:393
22451519910724,0cyclictest1773482-21kworker/3:019:36:103
2245147991040,100cyclictest0-21swapper/220:15:142
2245147991030,100cyclictest0-21swapper/222:21:592
22451639910299,3cyclictest546-21snmpd23:54:566
2245163991020,102cyclictest0-21swapper/621:22:106
22451439910299,3cyclictest546-21snmpd19:56:521
224514399102100,2cyclictest546-21snmpd21:41:371
2245143991020,102cyclictest0-21swapper/120:07:041
2245143991020,102cyclictest0-21swapper/119:30:151
2245140991020,101cyclictest0-21swapper/019:23:020
22451639910199,2cyclictest546-21snmpd22:23:566
22451639910199,2cyclictest546-21snmpd19:18:396
2245163991010,101cyclictest0-21swapper/622:44:156
2245163991010,101cyclictest0-21swapper/622:26:106
22451549910199,2cyclictest546-21snmpd21:12:024
22451549910199,1cyclictest597-21lldpd22:49:564
22451519910199,1cyclictest546-21snmpd00:06:543
22451519910197,0cyclictest141rcu_preempt22:10:083
22451479910199,2cyclictest546-21snmpd23:36:502
22451479910199,1cyclictest546-21snmpd20:14:232
22451479910198,3cyclictest546-21snmpd19:12:152
224514799101100,1cyclictest546-21snmpd21:34:402
224514799101100,1cyclictest546-21snmpd21:34:392
224514799101100,1cyclictest546-21snmpd19:59:042
2245147991010,101cyclictest0-21swapper/223:42:052
2245147991010,101cyclictest0-21swapper/221:12:512
2245147991010,100cyclictest0-21swapper/223:31:182
22451439910199,2cyclictest546-21snmpd22:19:231
2245143991010,99cyclictest0-21swapper/121:07:531
22451409910199,2cyclictest546-21snmpd20:50:240
22451409910198,3cyclictest546-21snmpd19:54:150
22451409910197,4cyclictest546-21snmpd21:31:100
22451409910197,4cyclictest546-21snmpd21:31:100
2245140991010,101cyclictest0-21swapper/021:57:500
2245140991010,0cyclictest0-21swapper/019:42:030
2245140991010,0cyclictest0-21swapper/000:34:420
2245168991000,99cyclictest0-21swapper/722:27:447
2245168991000,99cyclictest0-21swapper/720:00:377
2245168991000,99cyclictest0-21swapper/719:24:217
2245168991000,100cyclictest0-21swapper/723:40:177
2245168991000,100cyclictest0-21swapper/723:03:107
2245168991000,100cyclictest0-21swapper/719:10:247
22451639910099,1cyclictest546-21snmpd19:43:546
22451639910098,2cyclictest546-21snmpd00:27:576
22451639910097,3cyclictest546-21snmpd20:11:526
2245163991000,99cyclictest0-21swapper/622:08:356
2245163991000,99cyclictest0-21swapper/619:21:096
2245163991000,100cyclictest0-21swapper/620:53:116
2245163991000,100cyclictest0-21swapper/620:16:086
2245163991000,100cyclictest0-21swapper/619:10:506
22451599910099,1cyclictest561-21ntpd21:16:255
22451599910099,1cyclictest546-21snmpd19:32:425
22451599910099,1cyclictest546-21snmpd00:29:355
2245159991000,99cyclictest0-21swapper/521:41:465
2245159991000,100cyclictest0-21swapper/523:02:075
2245159991000,100cyclictest0-21swapper/521:00:175
22451549910099,1cyclictest546-21snmpd21:57:344
22451549910099,1cyclictest546-21snmpd00:14:364
2245154991000,99cyclictest0-21swapper/420:30:384
2245154991000,99cyclictest0-21swapper/420:06:044
2245154991000,99cyclictest0-21swapper/400:37:224
2245154991000,100cyclictest0-21swapper/420:45:174
22451519910099,1cyclictest546-21snmpd23:40:503
22451519910098,2cyclictest546-21snmpd22:09:173
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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