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2025-12-24 - 10:45

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 Dec 24, 2025 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
7007299912650,1261cyclictest7610522sleep319:55:023
7007299911830,1179cyclictest11150682sleep300:29:563
7007299911461,1140cyclictest1044382-21sleep23:35:003
88654221070,2sleep0221rcuc/021:30:190
8427372360,1sleep30-21swapper/320:55:163
700729992422,1cyclictest0-21swapper/323:00:003
700729991917,1cyclictest0-21swapper/322:50:213
10703342191,3sleep20-21swapper/223:55:142
700729991816,1cyclictest0-21swapper/322:10:233
700729991816,1cyclictest0-21swapper/321:55:013
700729991715,1cyclictest0-21swapper/323:55:003
700729991714,1cyclictest0-21swapper/320:20:243
70072999168,5cyclictest721274-21chrt19:20:203
700729991614,1cyclictest0-21swapper/323:56:433
700729991614,1cyclictest0-21swapper/321:40:113
700729991614,1cyclictest0-21swapper/321:20:013
700729991613,1cyclictest0-21swapper/323:26:283
700729991613,1cyclictest0-21swapper/322:41:303
70072999161,11cyclictest767689-21taskset20:00:153
70072999161,11cyclictest1089659-21taskset00:10:133
700729991513,1cyclictest0-21swapper/323:48:493
700729991513,1cyclictest0-21swapper/323:48:493
700729991513,1cyclictest0-21swapper/322:05:183
700729991513,1cyclictest0-21swapper/321:05:193
700729991513,1cyclictest0-21swapper/320:43:283
700729991513,1cyclictest0-21swapper/320:39:093
700729991513,1cyclictest0-21swapper/320:25:163
700729991513,0cyclictest0-21swapper/319:33:013
700729991512,1cyclictest0-21swapper/323:44:553
700729991512,1cyclictest0-21swapper/322:30:203
700729991512,1cyclictest0-21swapper/321:50:013
700729991512,1cyclictest0-21swapper/321:10:243
700729991512,1cyclictest0-21swapper/320:15:263
70072999151,10cyclictest1024819-21turbostat23:20:003
70072999151,10cyclictest1004864-21taskset23:00:253
301798150,4rtkit-daemon701881-21ps19:10:171
70072999144,7cyclictest8059492sleep320:30:133
700729991412,1cyclictest0-21swapper/323:10:163
700729991412,1cyclictest0-21swapper/322:45:043
700729991412,1cyclictest0-21swapper/322:35:163
700729991412,1cyclictest0-21swapper/322:05:003
700729991412,1cyclictest0-21swapper/319:50:333
700729991412,1cyclictest0-21swapper/319:35:203
700729991412,1cyclictest0-21swapper/300:32:443
700729991412,1cyclictest0-21swapper/300:16:403
700729991412,1cyclictest0-21swapper/300:05:233
700729991412,1cyclictest0-21swapper/300:00:583
700729991412,0cyclictest0-21swapper/319:47:043
700729991411,1cyclictest0-21swapper/321:20:223
700729991411,1cyclictest0-21swapper/321:20:223
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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