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2025-11-12 - 12:22

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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 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 rackeslot8s.osadl.org (updated Wed Nov 12, 2025 00:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
32936749912970,1294cyclictest36253762sleep323:00:013
32936749912160,1213cyclictest34720472sleep321:24:563
32936749912160,1213cyclictest34720472sleep321:24:563
32936749911940,1190cyclictest37312182sleep300:04:563
32936749911650,1161cyclictest33146802sleep319:24:573
32936749911410,1138cyclictest34035932sleep320:34:563
32936749910893,1082cyclictest3577710-21sleep22:30:013
3293674993731,368cyclictest3780082-21turbostat00:39:563
37330102180,1sleep00-21swapper/000:05:170
3293674991815,1cyclictest0-21swapper/322:35:273
3293674991815,1cyclictest0-21swapper/300:33:433
3293674991815,1cyclictest0-21swapper/300:25:013
132298180,4rtkit-daemon0-21swapper/022:09:110
3293674991614,1cyclictest0-21swapper/321:35:013
329367499161,12cyclictest3321523-21taskset19:30:013
329367499157,5cyclictest3416236-21turbostat20:45:003
329367499155,8cyclictest3690972-21taskset23:40:123
329367499155,8cyclictest3690972-21taskset23:40:123
329367499154,7cyclictest34944722sleep321:35:313
3293674991513,0cyclictest0-21swapper/323:33:593
3293674991513,0cyclictest0-21swapper/321:50:223
3293674991513,0cyclictest0-21swapper/320:54:053
3293674991512,1cyclictest0-21swapper/323:56:473
3293674991512,1cyclictest0-21swapper/323:50:153
3293674991512,1cyclictest0-21swapper/323:13:423
3293674991512,1cyclictest0-21swapper/322:32:053
3293674991512,1cyclictest0-21swapper/322:21:023
3293674991512,1cyclictest0-21swapper/319:13:433
3293674991512,1cyclictest0-21swapper/300:11:173
329367499151,11cyclictest3617219-21turbostat22:55:003
329367499151,11cyclictest3337164-21taskset19:40:193
329367499151,11cyclictest3333924-21turbostat19:40:013
329367499150,6cyclictest0-21swapper/323:35:123
329367499148,4cyclictest3640808-21taskset23:08:393
329367499147,4cyclictest3521251-21taskset21:55:143
329367499145,7cyclictest3503195-21taskset21:41:553
3293674991412,0cyclictest0-21swapper/323:15:503
3293674991412,0cyclictest0-21swapper/319:18:483
3293674991411,1cyclictest0-21swapper/321:15:243
3293674991411,1cyclictest0-21swapper/321:04:143
3293674991411,1cyclictest0-21swapper/319:58:343
3293674991411,1cyclictest0-21swapper/319:47:053
329367499141,10cyclictest3770043-21chrt00:25:323
329367499141,10cyclictest3671993-21taskset23:25:253
329367499141,10cyclictest3657925-21chrt23:20:133
329367499141,10cyclictest3617498-21taskset22:55:123
329367499141,10cyclictest3600759-21taskset22:41:143
329367499141,10cyclictest3529162-21chrt22:00:073
329367499141,10cyclictest3510908-21taskset21:45:563
329367499141,10cyclictest3479301-21chrt21:27:533
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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