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2025-11-24 - 17:09

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #4

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 here to display the system's profile data or here to proceed to next system.
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 50 highest latencies:
System rack9slot4s (updated Mon Nov 24, 2025 12:59:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
143379912321207,18cyclictest30118-1kworker/1:0H07:55:131
143369912131183,23cyclictest1827-21kworker/0:107:25:100
142502656612,28sleep10-21swapper/107:24:461
138912463417,31sleep00-21swapper/007:21:010
1433699240217,18cyclictest26769-21df07:55:140
1433799180171,6cyclictest0-21swapper/107:25:101
1267121360,2sleep012670-21sh10:05:370
2416521220,2sleep024164-21ssh11:59:130
956821110,4sleep01433699cyclictest11:44:010
306702950,2sleep10-21swapper/110:25:131
123782850,8sleep11433799cyclictest12:20:171
254002820,8sleep01433699cyclictest12:33:550
168272790,4sleep11433799cyclictest11:17:351
168272790,4sleep11433799cyclictest11:17:341
144932690,2sleep014494-21sh11:49:090
227762490,7sleep11433799cyclictest07:45:161
83032460,5sleep11433799cyclictest10:35:191
250482460,4sleep122-21ksoftirqd/112:33:231
327042420,4sleep01433699cyclictest11:00:250
14337994213,15cyclictest22-21ksoftirqd/110:15:431
1433799418,11cyclictest0-21swapper/110:20:041
14337994118,8cyclictest22-21ksoftirqd/107:52:331
14337994115,7cyclictest22-21ksoftirqd/111:23:431
1433799411,19cyclictest32369-21fgrep12:40:271
14337994017,7cyclictest22-21ksoftirqd/111:29:051
14337994017,6cyclictest22-21ksoftirqd/109:33:271
14337994015,14cyclictest22-21ksoftirqd/111:48:321
1433699401,20cyclictest10017-21diskstats09:30:150
1433699401,19cyclictest28591-21ssh10:55:440
14337993924,5cyclictest22-21ksoftirqd/108:19:541
14337993918,6cyclictest22-21ksoftirqd/109:35:131
14337993918,6cyclictest22-21ksoftirqd/109:10:221
14337993917,8cyclictest22-21ksoftirqd/108:42:281
14337993917,7cyclictest22-21ksoftirqd/109:46:471
14337993917,7cyclictest22-21ksoftirqd/108:48:081
14337993917,6cyclictest22-21ksoftirqd/112:08:081
14337993917,6cyclictest22-21ksoftirqd/111:05:131
14337993916,7cyclictest22-21ksoftirqd/111:57:481
14337993916,6cyclictest22-21ksoftirqd/112:35:311
14337993916,14cyclictest22-21ksoftirqd/111:41:061
14337993915,6cyclictest22-21ksoftirqd/110:43:001
14337993913,15cyclictest22-21ksoftirqd/110:56:011
14337993913,10cyclictest22-21ksoftirqd/109:55:181
1433699392,21cyclictest25492-21ssh10:53:130
14337993819,8cyclictest22-21ksoftirqd/112:27:131
14337993817,6cyclictest22-21ksoftirqd/111:50:251
14337993817,6cyclictest22-21ksoftirqd/110:00:141
14337993817,10cyclictest3234-21diskstats10:30:171
14337993816,7cyclictest22-21ksoftirqd/112:02:461
14337993816,6cyclictest22-21ksoftirqd/111:13:031
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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