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2026-04-19 - 15:31

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 Apr 19, 2026 12:46:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
326282860,2sleep773-21ksoftirqd/707:05:197
111391720,2ptp4l0-21swapper/007:05:180
111391620,5ptp4l0-21swapper/407:08:124
111391600,29ptp4l0-21swapper/107:06:481
276572580,0sleep50-21swapper/512:15:495
3117525545,6sleep20-21swapper/207:05:072
3274424837,7sleep30-21swapper/307:05:403
57224635,6sleep60-21swapper/607:09:116
3116924635,7sleep50-21swapper/507:05:025
111391320,0ptp4l0-21swapper/412:35:234
111391320,0ptp4l0-21swapper/412:35:224
111391320,0ptp4l0-21swapper/409:18:154
111391320,0ptp4l0-21swapper/110:45:241
111391320,0ptp4l0-21swapper/010:52:360
111391320,0ptp4l0-21swapper/008:41:560
111391310,4ptp4l0-21swapper/411:54:174
111391310,3ptp4l0-21swapper/410:58:344
111391310,0ptp4l0-21swapper/411:09:524
111391310,0ptp4l0-21swapper/410:45:074
111391310,0ptp4l0-21swapper/409:50:174
111391310,0ptp4l0-21swapper/409:46:414
111391310,0ptp4l0-21swapper/111:12:551
111391310,0ptp4l0-21swapper/012:39:240
111391310,0ptp4l0-21swapper/012:39:240
111391310,0ptp4l0-21swapper/011:41:090
111391310,0ptp4l0-21swapper/009:21:370
111391300,4ptp4l0-21swapper/411:12:054
111391300,2ptp4l0-21swapper/011:13:260
111391300,2ptp4l0-21swapper/010:38:460
111391300,0ptp4l0-21swapper/510:15:215
111391300,0ptp4l0-21swapper/412:14:184
111391300,0ptp4l0-21swapper/412:04:104
111391300,0ptp4l0-21swapper/410:31:414
111391300,0ptp4l0-21swapper/410:23:204
111391300,0ptp4l0-21swapper/410:16:494
111391300,0ptp4l0-21swapper/410:04:234
111391300,0ptp4l0-21swapper/407:38:204
111391300,0ptp4l0-21swapper/012:03:230
111391300,0ptp4l0-21swapper/010:59:230
111391300,0ptp4l0-21swapper/010:44:590
111391300,0ptp4l0-21swapper/010:07:540
111391300,0ptp4l0-21swapper/009:43:010
111391300,0ptp4l0-21swapper/009:19:070
111391290,2ptp4l0-21swapper/410:29:204
111391290,0ptp4l0-21swapper/412:23:324
111391290,0ptp4l0-21swapper/411:34:114
111391290,0ptp4l0-21swapper/411:25:084
111391290,0ptp4l0-21swapper/410:54:514
111391290,0ptp4l0-21swapper/410:35:424
111391290,0ptp4l0-21swapper/410:08:084
111391290,0ptp4l0-21swapper/409:27:384
111391290,0ptp4l0-21swapper/108:55:201
111391290,0ptp4l0-21swapper/107:45:131
111391290,0ptp4l0-21swapper/009:59:150
111391290,0ptp4l0-21swapper/009:59:140
111391290,0ptp4l0-21swapper/009:11:380
111391280,3ptp4l241ktimersoftd/108:10:181
111391280,0ptp4l0-21swapper/412:30:094
111391280,0ptp4l0-21swapper/412:18:304
111391280,0ptp4l0-21swapper/411:36:274
111391280,0ptp4l0-21swapper/411:16:264
111391280,0ptp4l0-21swapper/410:41:544
111391280,0ptp4l0-21swapper/409:55:044
111391280,0ptp4l0-21swapper/409:55:034
111391280,0ptp4l0-21swapper/409:20:144
111391280,0ptp4l0-21swapper/112:33:451
111391280,0ptp4l0-21swapper/112:17:041
111391280,0ptp4l0-21swapper/109:54:351
111391280,0ptp4l0-21swapper/012:25:020
111391280,0ptp4l0-21swapper/011:38:120
111391280,0ptp4l0-21swapper/011:27:320
111391280,0ptp4l0-21swapper/011:03:100
111391280,0ptp4l0-21swapper/009:52:290
111391270,2ptp4l0-21swapper/412:29:374
111391270,2ptp4l0-21swapper/409:38:034
111391270,0ptp4l0-21swapper/712:11:157
111391270,0ptp4l0-21swapper/411:01:024
111391270,0ptp4l0-21swapper/410:10:044
111391270,0ptp4l0-21swapper/407:10:434
111391270,0ptp4l0-21swapper/009:34:470
111391270,0ptp4l0-21swapper/008:38:550
111391260,1ptp4l0-21swapper/011:15:530
111391260,0ptp4l0-21swapper/511:56:465
111391260,0ptp4l0-21swapper/407:45:014
111391260,0ptp4l0-21swapper/310:27:123
111391260,0ptp4l0-21swapper/111:46:391
111391260,0ptp4l0-21swapper/110:34:571
111391260,0ptp4l0-21swapper/109:37:001
111391260,0ptp4l0-21swapper/108:33:581
111391260,0ptp4l0-21swapper/012:14:080
111391260,0ptp4l0-21swapper/011:22:430
111391260,0ptp4l0-21swapper/010:33:210
111391260,0ptp4l0-21swapper/009:47:380
111391260,0ptp4l0-21swapper/009:36:500
111391260,0ptp4l0-21swapper/008:31:200
111391260,0ptp4l0-21swapper/007:49:110
111391250,3ptp4l0-21swapper/010:45:270
111391250,1ptp4l806-21gdbus12:00:001
111391250,1ptp4l6429-21diskstats08:30:144
111391250,0ptp4l0-21swapper/708:54:447
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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