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2026-06-21 - 17:41

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, 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 100 highest latencies:
System rackcslot8s.osadl.org (updated Sun Jun 21, 2026 12:46:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
111391730,2ptp4l0-21swapper/407:05:184
111391730,2ptp4l0-21swapper/407:05:184
111391690,30ptp4l0-21swapper/007:05:160
111391690,30ptp4l0-21swapper/007:05:160
144902640,0sleep60-21swapper/609:19:456
3232600,0sleep40-21swapper/410:28:254
112592590,0sleep00-21swapper/010:43:030
1578625735,7sleep30-21swapper/307:08:163
1578625735,7sleep30-21swapper/307:08:153
1881915533,7phc2sys0-21swapper/207:06:132
1881915533,7phc2sys0-21swapper/207:06:132
1569325242,6sleep10-21swapper/107:07:021
1569325242,6sleep10-21swapper/107:07:021
1402125131,6sleep70-21swapper/707:05:077
1402125131,6sleep70-21swapper/707:05:077
1881914829,4phc2sys0-21swapper/607:05:136
1881914829,4phc2sys0-21swapper/607:05:126
1562424534,7sleep50-21swapper/507:06:105
1562424534,7sleep50-21swapper/507:06:095
111391350,0ptp4l0-21swapper/012:00:100
111391340,0ptp4l0-21swapper/407:20:184
111391330,0ptp4l0-21swapper/508:00:175
111391330,0ptp4l0-21swapper/012:24:530
111391330,0ptp4l0-21swapper/012:24:530
111391320,0ptp4l0-21swapper/511:05:205
111391320,0ptp4l0-21swapper/110:30:561
111391320,0ptp4l0-21swapper/011:15:480
111391310,0ptp4l0-21swapper/008:25:170
111391300,1ptp4l14006-21ssh10:45:390
111391300,0ptp4l6965-21diskmemload09:54:070
111391300,0ptp4l0-21swapper/510:02:205
111391300,0ptp4l0-21swapper/509:40:225
111391300,0ptp4l0-21swapper/509:40:225
111391300,0ptp4l0-21swapper/412:39:394
111391300,0ptp4l0-21swapper/412:26:054
111391300,0ptp4l0-21swapper/411:18:134
111391300,0ptp4l0-21swapper/409:44:104
111391300,0ptp4l0-21swapper/409:44:104
111391300,0ptp4l0-21swapper/011:10:140
111391300,0ptp4l0-21swapper/009:23:470
111391290,2ptp4l0-21swapper/511:25:115
111391290,0ptp4l0-21swapper/512:29:025
111391290,0ptp4l0-21swapper/512:13:115
111391290,0ptp4l0-21swapper/511:52:325
111391290,0ptp4l0-21swapper/411:09:334
111391290,0ptp4l0-21swapper/410:53:194
111391290,0ptp4l0-21swapper/410:17:214
111391290,0ptp4l0-21swapper/410:14:064
111391290,0ptp4l0-21swapper/409:53:194
111391290,0ptp4l0-21swapper/409:14:054
111391290,0ptp4l0-21swapper/109:40:051
111391290,0ptp4l0-21swapper/109:40:051
111391290,0ptp4l0-21swapper/109:38:411
111391290,0ptp4l0-21swapper/012:06:300
111391290,0ptp4l0-21swapper/011:54:490
111391290,0ptp4l0-21swapper/011:33:480
111391290,0ptp4l0-21swapper/010:12:400
111391290,0ptp4l0-21swapper/009:47:490
111391290,0ptp4l0-21swapper/009:30:400
111391280,0ptp4l0-21swapper/509:20:155
111391280,0ptp4l0-21swapper/412:06:594
111391280,0ptp4l0-21swapper/410:42:214
111391280,0ptp4l0-21swapper/409:22:214
111391280,0ptp4l0-21swapper/310:23:083
111391280,0ptp4l0-21swapper/111:51:321
111391280,0ptp4l0-21swapper/110:19:561
111391280,0ptp4l0-21swapper/010:31:300
111391280,0ptp4l0-21swapper/009:56:370
111391280,0ptp4l0-21swapper/009:36:140
111391280,0ptp4l0-21swapper/009:00:210
111391270,0ptp4l0-21swapper/711:14:317
111391270,0ptp4l0-21swapper/510:47:375
111391270,0ptp4l0-21swapper/411:59:214
111391270,0ptp4l0-21swapper/411:32:164
111391270,0ptp4l0-21swapper/411:27:074
111391270,0ptp4l0-21swapper/411:10:374
111391270,0ptp4l0-21swapper/410:20:584
111391270,0ptp4l0-21swapper/409:49:534
111391270,0ptp4l0-21swapper/409:36:284
111391270,0ptp4l0-21swapper/408:50:004
111391270,0ptp4l0-21swapper/112:29:301
111391270,0ptp4l0-21swapper/110:54:111
111391270,0ptp4l0-21swapper/110:24:261
111391270,0ptp4l0-21swapper/012:12:260
111391270,0ptp4l0-21swapper/011:57:480
111391270,0ptp4l0-21swapper/011:41:270
111391270,0ptp4l0-21swapper/011:08:400
111391270,0ptp4l0-21swapper/010:25:190
111391270,0ptp4l0-21swapper/010:06:550
111391270,0ptp4l0-21swapper/009:16:300
111391260,2ptp4l1061-21snmpd08:37:120
111391260,1ptp4l321ktimersoftd/211:52:382
111391260,0ptp4l0-21swapper/510:10:305
111391260,0ptp4l0-21swapper/509:12:455
111391260,0ptp4l0-21swapper/507:15:015
111391260,0ptp4l0-21swapper/412:18:274
111391260,0ptp4l0-21swapper/411:00:184
111391260,0ptp4l0-21swapper/409:56:024
111391260,0ptp4l0-21swapper/409:34:454
111391260,0ptp4l0-21swapper/408:35:194
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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