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2025-10-28 - 15:50

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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  Congatec
Click here to display the system's profile data.
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 Oct 28, 2025 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
300190599744739,4cyclictest3078823-21kworker/0:1+events20:10:230
300191199743739,3cyclictest3265965-21kworker/2:2+events23:06:452
300190999743739,3cyclictest3085201-21kworker/1:2+events20:30:441
300190999743738,4cyclictest3209864-21kworker/1:2+events22:27:441
300191499742738,3cyclictest3178357-21kworker/3:0+events21:46:493
300190999742737,4cyclictest3147168-21kworker/1:0+events21:13:401
300191199741737,3cyclictest2949962-21kworker/2:0+events22:41:132
300190999741738,2cyclictest3209864-21kworker/1:2+events22:15:211
300190999741737,3cyclictest4034150-21kworker/1:2+events19:19:211
300190999741737,3cyclictest3209864-21kworker/1:2+events22:23:171
300190999741737,3cyclictest3085201-21kworker/1:2+events20:59:191
300190999741737,3cyclictest3085201-21kworker/1:2+events20:54:221
300191499740736,3cyclictest2995018-21kworker/3:2+events21:22:063
300191499740735,4cyclictest2995018-21kworker/3:2+events20:25:423
300191199740734,5cyclictest3265965-21kworker/2:2+events23:03:422
300190999740736,3cyclictest3147168-21kworker/1:0+events21:16:261
300190999738733,4cyclictest3085201-21kworker/1:2+events20:45:211
300191499737727,8cyclictest2995018-21kworker/3:2+events19:10:213
300191199737733,3cyclictest3265965-21kworker/2:2+events23:33:442
300190999737733,3cyclictest4034150-21kworker/1:2+events19:21:061
300191199736732,3cyclictest3265965-21kworker/2:2+events22:49:242
300190999736731,4cyclictest3085201-21kworker/1:2+events20:36:271
300191499735725,5cyclictest2995018-21kworker/3:2+events19:25:203
300191199735731,3cyclictest3265965-21kworker/2:2+events23:36:352
300191199735731,3cyclictest3265965-21kworker/2:2+events22:58:102
300190999735731,3cyclictest3085201-21kworker/1:2+events21:04:251
300190999734730,3cyclictest3085201-21kworker/1:2+events20:42:341
300191499733722,9cyclictest3178357-21kworker/3:0+events21:56:253
300191499731726,4cyclictest3178357-21kworker/3:0+events00:06:243
300190999731726,4cyclictest3147168-21kworker/1:0+events21:05:221
300191199730726,3cyclictest3265965-21kworker/2:2+events22:50:512
300191499729722,6cyclictest2995018-21kworker/3:2+events20:00:233
300191499724718,5cyclictest3178357-21kworker/3:0+events21:40:213
300190599717713,3cyclictest3059827-21kworker/0:0+events20:09:030
300191499714710,3cyclictest3172473-21turbostat21:29:553
300191499713709,3cyclictest3178357-21kworker/3:0+events23:45:223
300191499712704,3cyclictest3178357-21kworker/3:0+events23:40:203
300191499711708,2cyclictest2995018-21kworker/3:2+events19:47:393
300191499711706,4cyclictest3178357-21kworker/3:0+events23:14:343
300191499710706,3cyclictest3178704-21turbostat21:34:563
300191499708702,5cyclictest3178357-21kworker/3:0+events21:50:223
300191499706703,2cyclictest2995018-21kworker/3:2+events20:21:153
300191499704700,3cyclictest3178357-21kworker/3:0+events22:05:223
300191499703699,3cyclictest3159749-21turbostat21:19:563
300190999702699,2cyclictest3097630-21turbostat20:29:551
300191499701697,3cyclictest3216060-21turbostat22:04:553
300191499701697,3cyclictest3178357-21kworker/3:0+events00:25:213
300191499699694,4cyclictest3178357-21kworker/3:0+events21:35:213
300191499698695,2cyclictest3178357-21kworker/3:0+events00:19:373
300191499697694,2cyclictest3178357-21kworker/3:0+events22:10:243
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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