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2026-03-09 - 20:46

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 Mon Mar 09, 2026 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21152789911020,1098cyclictest2454875-21sleep11:10:003
21152789910580,1053cyclictest2364878-21sleep10:10:003
2115278992890,285cyclictest2537489-21turbostat12:09:553
2115278992700,267cyclictest2195728-21turbostat08:14:553
24971882210,3sleep12496905-21ssh11:35:181
173198210,6rtkit-daemon0-21swapper/112:33:561
21328752180,1sleep20-21swapper/207:20:162
211527899188,7cyclictest25153122sleep311:50:123
211527899182,12cyclictest2342448-21turbostat09:55:003
211527899176,7cyclictest21422952sleep307:25:193
211527899171,13cyclictest2248694-21taskset08:50:133
211527899166,7cyclictest23706742sleep310:10:253
211527899164,8cyclictest25602262sleep312:19:493
211527899164,8cyclictest25602262sleep312:19:493
211527899164,8cyclictest21583222sleep307:40:183
2115278991613,1cyclictest0-21swapper/310:49:133
2115278991613,1cyclictest0-21swapper/307:55:573
211527899161,11cyclictest2372692-21taskset10:15:123
211527899161,10cyclictest23278152sleep309:45:123
211527899160,6cyclictest0-21swapper/311:15:203
211527899155,7cyclictest2528186-21taskset11:55:193
211527899154,7cyclictest25670792sleep312:22:213
2115278991513,1cyclictest0-21swapper/310:24:143
2115278991513,1cyclictest0-21swapper/309:02:553
2115278991512,1cyclictest0-21swapper/312:10:563
2115278991512,1cyclictest0-21swapper/311:41:373
2115278991512,1cyclictest0-21swapper/309:22:573
2115278991512,1cyclictest0-21swapper/308:06:153
2115278991512,1cyclictest0-21swapper/307:11:133
211527899151,11cyclictest2500160-21taskset11:40:013
211527899151,11cyclictest2130568-21chrt07:20:013
23726652142,8sleep22372687-21apt-get10:15:132
211527899145,7cyclictest2575222-21taskset12:29:543
211527899145,6cyclictest25147852sleep311:49:033
211527899145,6cyclictest2202721-21taskset08:15:073
211527899144,7cyclictest24251722sleep310:50:043
211527899144,7cyclictest21438942sleep307:30:123
211527899144,7cyclictest21438942sleep307:30:113
211527899141,9cyclictest2400393-21taskset10:30:183
211527899141,9cyclictest22799162sleep309:10:213
211527899141,9cyclictest21699472sleep307:50:123
2115278991412,1cyclictest0-21swapper/309:37:393
2115278991412,0cyclictest0-21swapper/312:05:003
2115278991412,0cyclictest0-21swapper/309:27:233
2115278991412,0cyclictest0-21swapper/308:49:003
2115278991411,1cyclictest0-21swapper/310:36:033
2115278991411,1cyclictest0-21swapper/310:04:393
2115278991411,1cyclictest0-21swapper/308:30:193
211527899141,10cyclictest2589376-21taskset12:36:553
211527899141,10cyclictest2470471-21taskset11:20:133
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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