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2026-03-31 - 00:02

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 Tue Mar 24, 2026 00:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
8688089919950,1991cyclictest9226212sleep319:49:563
8688089917610,1756cyclictest1109366-21sleep22:05:013
10924242560,2sleep20-21swapper/221:50:272
9357032270,1sleep10-21swapper/120:00:011
9694262210,1sleep30-21swapper/320:25:173
86880899181,13cyclictest884101-21taskset19:20:013
86880899181,13cyclictest1012238-21turbostat21:00:003
12861512180,9sleep21286294-21sed00:00:152
86880899177,7cyclictest1040360-21turbostat21:20:003
86880899175,8cyclictest13312242sleep300:30:003
868808991712,3cyclictest9993432sleep320:47:533
86880899171,13cyclictest1170538-21turbostat22:45:003
86880899171,13cyclictest1093538-21taskset21:53:483
86880899166,7cyclictest12933572sleep300:05:133
86880899166,7cyclictest1277700-21sleep23:59:553
86880899166,7cyclictest1053439-21taskset21:25:213
86880899164,8cyclictest9437262sleep320:05:173
868808991613,1cyclictest0-21swapper/300:31:133
86880899161,12cyclictest1269432-21taskset23:48:193
86880899161,12cyclictest1140234-21taskset22:25:143
86880899161,12cyclictest1070982-21taskset21:40:023
86880899161,11cyclictest875201-21turbostat19:15:003
86880899161,11cyclictest1315893-21turbostat00:20:003
86880899161,11cyclictest1086319-21turbostat21:50:003
86880899161,11cyclictest1024976-21turbostat21:10:003
86880899156,7cyclictest1131208-21taskset22:16:553
86880899155,7cyclictest12532472sleep323:35:413
86880899154,8cyclictest10321052sleep321:13:193
868808991513,0cyclictest0-21swapper/300:39:113
868808991512,1cyclictest0-21swapper/323:21:493
868808991512,1cyclictest0-21swapper/320:23:073
86880899151,11cyclictest986650-21taskset20:38:333
86880899151,11cyclictest957548-21taskset20:15:193
86880899151,11cyclictest915806-21taskset19:40:343
86880899151,11cyclictest1292948-21taskset00:04:403
86880899151,11cyclictest1245757-21taskset23:31:073
86880899151,11cyclictest1018244-21taskset21:00:303
86880899151,10cyclictest1301457-21taskset00:10:173
86880899151,10cyclictest1215193-21taskset23:11:093
86880899151,10cyclictest1197059-21taskset23:00:183
86880899145,7cyclictest987458-21taskset20:40:133
86880899141,9cyclictest897081-21chrt19:30:123
86880899141,9cyclictest1255074-21taskset23:40:133
86880899141,9cyclictest1221191-21taskset23:15:183
86880899141,9cyclictest1201528-21taskset23:05:123
86880899141,9cyclictest11708702sleep322:45:153
86880899141,9cyclictest1137433-21taskset22:20:203
86880899141,9cyclictest1117259-21taskset22:10:133
868808991412,0cyclictest0-21swapper/320:04:213
868808991411,1cyclictest0-21swapper/322:50:463
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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