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2025-11-30 - 03:40

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #6

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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack3slot6s.osadl.org (updated Sun Nov 30, 2025 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
7465211699,12sleep20-21swapper/219:07:092
7357211595,15sleep00-21swapper/019:05:480
7538211296,11sleep10-21swapper/119:08:041
7355210796,6sleep30-21swapper/319:05:463
204672800,1sleep10-21swapper/121:40:171
138172750,0sleep10-21swapper/122:07:351
180142680,0sleep10-21swapper/123:55:181
180142680,0sleep10-21swapper/123:55:181
237372610,3sleep1771799cyclictest00:01:031
771699259,14cyclictest0-21swapper/020:35:120
771899221,19cyclictest5798-21ssh21:25:122
771899221,19cyclictest0-21swapper/220:55:132
771899211,18cyclictest0-21swapper/200:10:142
771699210,19cyclictest0-21swapper/019:45:140
7716992017,2cyclictest10897-21kworker/u8:022:57:040
771699200,18cyclictest0-21swapper/020:20:130
7719991916,2cyclictest30230-21kworker/u8:000:09:043
7719991916,2cyclictest27437-21kworker/u8:121:54:013
7719991916,2cyclictest14146-21kworker/u8:123:49:043
7718991913,4cyclictest14018-21stty19:25:122
771899191,16cyclictest0-21swapper/221:20:132
771899190,2cyclictest0-21swapper/223:35:112
7717991916,2cyclictest6218-21kworker/u8:022:04:041
7719991815,2cyclictest9581-21kworker/u8:021:35:043
7719991815,2cyclictest6218-21kworker/u8:022:22:043
7719991815,2cyclictest16726-21kworker/u8:221:46:043
7719991815,2cyclictest14277-21kworker/u8:200:00:043
7719991815,2cyclictest10897-21kworker/u8:023:19:043
771999180,2cyclictest0-21swapper/322:04:053
771899180,16cyclictest0-21swapper/223:20:122
7716991815,2cyclictest9581-21kworker/u8:021:32:040
7716991815,2cyclictest9581-21kworker/u8:021:32:040
7719991714,2cyclictest6218-21kworker/u8:022:14:043
7719991714,2cyclictest28706-21kworker/u8:121:31:043
7719991714,2cyclictest28706-21kworker/u8:121:31:043
7719991714,2cyclictest14277-21kworker/u8:223:59:043
7719991714,2cyclictest14277-21kworker/u8:223:59:043
7719991713,3cyclictest14146-21kworker/u8:123:44:043
7716991713,2cyclictest16726-21kworker/u8:221:47:040
771699170,15cyclictest0-21swapper/021:54:050
771999161,3cyclictest7654-21ntp_states22:35:183
771999161,3cyclictest4618-21ssh00:15:243
7719991613,2cyclictest9922-21kworker/u8:021:12:043
7719991613,2cyclictest3487-21kworker/u8:200:23:043
7719991613,2cyclictest32413-21kworker/u8:221:57:043
7719991613,2cyclictest29718-21kworker/u8:122:30:053
7719991613,2cyclictest26069-21kworker/u8:023:34:043
7719991613,2cyclictest19559-21kworker/u8:020:20:043
7719991613,2cyclictest1851-21kworker/u8:119:39:043
7719991613,2cyclictest11147-21kworker/u8:000:36:053
7719991613,2cyclictest10897-21kworker/u8:023:03:043
771999161,13cyclictest3227-21ssh21:21:353
771999161,13cyclictest23135-21ssh21:43:203
771999161,13cyclictest0-21swapper/319:15:173
771899163,11cyclictest0-21swapper/222:53:162
771899161,4cyclictest11898-21ssh23:15:112
7718991613,2cyclictest0-21swapper/222:24:392
7718991611,3cyclictest11084-21fw_packets21:30:162
7718991611,3cyclictest11084-21fw_packets21:30:152
7718991611,3cyclictest0-21swapper/223:25:502
771899161,13cyclictest0-21swapper/222:15:162
7716991613,2cyclictest28706-21kworker/u8:121:24:050
7716991613,2cyclictest22083-21kworker/u8:220:07:040
7716991613,2cyclictest14146-21kworker/u8:100:18:040
7716991613,2cyclictest14146-21kworker/u8:100:05:040
7719991512,2cyclictest9922-21kworker/u8:020:57:043
7719991512,2cyclictest7444-21kworker/u8:321:26:043
7719991512,2cyclictest6218-21kworker/u8:022:08:043
7719991512,2cyclictest5944-21kworker/u8:220:39:043
7719991512,2cyclictest5149-21kworker/u8:223:10:013
7719991512,2cyclictest3487-21kworker/u8:200:26:043
7719991512,2cyclictest31838-21kworker/u8:019:11:043
7719991512,2cyclictest30230-21kworker/u8:000:14:043
7719991512,2cyclictest22083-21kworker/u8:220:09:043
7719991512,2cyclictest19559-21kworker/u8:019:54:053
7719991512,2cyclictest1361-21kworker/u8:120:29:043
7719991512,2cyclictest10897-21kworker/u8:022:54:053
771999151,12cyclictest0-21swapper/319:25:153
771999150,13cyclictest0-21swapper/322:56:363
771899152,7cyclictest15418-21ssh22:10:012
771899152,6cyclictest0-21swapper/222:41:312
771899152,3cyclictest31293-21sh22:25:382
771899152,2cyclictest23838-21diskmemload21:52:362
771899151,3cyclictest7113-21ssh23:44:302
7718991512,2cyclictest23838-21diskmemload21:49:152
7718991511,3cyclictest27627-21gzip00:05:242
771899151,12cyclictest25893-21apt-get23:30:102
771899151,12cyclictest0-21swapper/223:09:462
771899150,13cyclictest0-21swapper/200:39:202
7717991512,2cyclictest23838-21diskmemload21:24:461
7717991512,2cyclictest23838-21diskmemload00:08:251
7717991512,2cyclictest19559-21kworker/u8:019:48:041
7717991512,2cyclictest0-21swapper/122:40:251
771799150,2cyclictest0-21swapper/123:10:561
771799150,13cyclictest0-21swapper/122:32:551
771799150,13cyclictest0-21swapper/100:10:251
7716991512,2cyclictest9922-21kworker/u8:021:14:010
7716991512,2cyclictest5149-21kworker/u8:223:11:040
7716991512,2cyclictest5149-21kworker/u8:223:08:050
7716991512,2cyclictest5058-21kworker/u8:222:41:050
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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