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2026-01-09 - 19:43

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 Fri Jan 09, 2026 12:46:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
205582850,2sleep420563-21unixbench_singl07:05:204
2085827947,17sleep70-21swapper/707:08:457
111391720,32ptp4l0-21swapper/107:05:101
80162700,0sleep20-21swapper/211:10:132
290182610,0sleep10-21swapper/110:12:441
269452560,0sleep70-21swapper/708:30:147
2097025434,6sleep20-21swapper/207:10:002
2074625433,6sleep60-21swapper/607:07:166
111391510,5ptp4l0-21swapper/507:09:075
2074324837,7sleep30-21swapper/307:07:133
2074024736,6sleep00-21swapper/007:07:090
111391320,0ptp4l0-21swapper/411:13:104
111391310,0ptp4l0-21swapper/410:56:534
111391310,0ptp4l0-21swapper/012:30:000
111391310,0ptp4l0-21swapper/011:40:190
111391310,0ptp4l0-21swapper/007:25:170
111391300,0ptp4l0-21swapper/611:00:146
111391300,0ptp4l0-21swapper/608:45:166
111391300,0ptp4l0-21swapper/411:59:534
111391300,0ptp4l0-21swapper/410:26:154
111391300,0ptp4l0-21swapper/209:50:382
111391300,0ptp4l0-21swapper/010:50:010
111391300,0ptp4l0-21swapper/010:34:150
111391300,0ptp4l0-21swapper/008:25:160
111391290,2ptp4l0-21swapper/411:33:234
111391290,1ptp4l6059-21ssh11:07:112
111391290,1ptp4l351-21ssh10:18:030
111391290,0ptp4l12119-21diskmemload11:42:184
111391290,0ptp4l0-21swapper/710:07:447
111391290,0ptp4l0-21swapper/412:30:134
111391290,0ptp4l0-21swapper/411:28:144
111391290,0ptp4l0-21swapper/411:17:094
111391290,0ptp4l0-21swapper/411:00:274
111391290,0ptp4l0-21swapper/409:46:364
111391290,0ptp4l0-21swapper/409:36:204
111391290,0ptp4l0-21swapper/409:21:324
111391290,0ptp4l0-21swapper/208:45:142
111391290,0ptp4l0-21swapper/111:12:271
111391290,0ptp4l0-21swapper/011:58:110
111391290,0ptp4l0-21swapper/010:00:430
111391290,0ptp4l0-21swapper/009:30:410
111391280,6ptp4l0-21swapper/009:59:570
111391280,0ptp4l0-21swapper/611:59:336
111391280,0ptp4l0-21swapper/412:20:164
111391280,0ptp4l0-21swapper/412:03:184
111391280,0ptp4l0-21swapper/411:06:414
111391280,0ptp4l0-21swapper/410:53:264
111391280,0ptp4l0-21swapper/409:17:174
111391280,0ptp4l0-21swapper/110:29:581
111391280,0ptp4l0-21swapper/109:26:511
111391280,0ptp4l0-21swapper/012:37:250
111391280,0ptp4l0-21swapper/011:16:140
111391280,0ptp4l0-21swapper/011:10:470
111391280,0ptp4l0-21swapper/010:52:560
111391280,0ptp4l0-21swapper/010:05:130
111391270,6ptp4l0-21swapper/009:20:520
111391270,0ptp4l0-21swapper/510:15:355
111391270,0ptp4l0-21swapper/410:35:344
111391270,0ptp4l0-21swapper/409:57:224
111391270,0ptp4l0-21swapper/409:51:244
111391270,0ptp4l0-21swapper/409:41:434
111391270,0ptp4l0-21swapper/112:23:341
111391270,0ptp4l0-21swapper/110:42:301
111391270,0ptp4l0-21swapper/012:13:570
111391270,0ptp4l0-21swapper/011:35:190
111391270,0ptp4l0-21swapper/011:27:270
111391270,0ptp4l0-21swapper/011:01:320
111391270,0ptp4l0-21swapper/010:28:130
111391260,0ptp4l0-21swapper/511:08:375
111391260,0ptp4l0-21swapper/412:25:484
111391260,0ptp4l0-21swapper/412:19:194
111391260,0ptp4l0-21swapper/410:41:324
111391260,0ptp4l0-21swapper/410:24:404
111391260,0ptp4l0-21swapper/111:52:011
111391260,0ptp4l0-21swapper/011:31:170
111391260,0ptp4l0-21swapper/011:06:380
111391260,0ptp4l0-21swapper/009:51:450
111391250,3ptp4l321ktimersoftd/211:33:292
111391250,1ptp4l8588-21sensors12:35:164
111391250,1ptp4l10481-21fw_conntrack09:05:120
111391250,1ptp4l10481-21fw_conntrack09:05:110
111391250,0ptp4l0-21swapper/612:06:026
111391250,0ptp4l0-21swapper/609:14:536
111391250,0ptp4l0-21swapper/609:14:536
111391250,0ptp4l0-21swapper/411:21:164
111391250,0ptp4l0-21swapper/410:45:134
111391250,0ptp4l0-21swapper/410:03:044
111391250,0ptp4l0-21swapper/409:25:444
111391250,0ptp4l0-21swapper/112:37:201
111391250,0ptp4l0-21swapper/011:49:140
111391250,0ptp4l0-21swapper/011:49:130
111391250,0ptp4l0-21swapper/010:55:180
111391250,0ptp4l0-21swapper/010:37:250
111391250,0ptp4l0-21swapper/009:49:230
111391250,0ptp4l0-21swapper/009:43:500
111391250,0ptp4l0-21swapper/009:15:420
111391240,7ptp4l0-21swapper/411:47:454
111391240,7ptp4l0-21swapper/411:47:444
111391240,1ptp4l6032-21diskstats07:45:115
111391240,1ptp4l5184-21sed12:30:192
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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