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2026-07-13 - 01:13

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 Jul 12, 2026 12:46:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
19112690,2sleep72753999cyclictest12:15:087
111391660,27ptp4l0-21swapper/007:05:140
221332640,2sleep422124-21turbostat12:00:004
111391620,5ptp4l0-21swapper/407:07:354
111391620,31ptp4l0-21swapper/107:06:501
2710126050,6sleep70-21swapper/707:08:307
98262580,1sleep7711rcuc/709:40:007
2713525646,6sleep20-21swapper/207:08:502
306212550,0sleep10-21swapper/108:25:121
2692325533,7sleep50-21swapper/507:06:135
2688325533,7sleep30-21swapper/307:05:383
2705225231,6sleep60-21swapper/607:07:506
157502490,0sleep30-21swapper/309:45:333
111391350,0ptp4l0-21swapper/008:25:180
111391340,1ptp4l21219-21diskstats10:35:131
111391340,1ptp4l21219-21diskstats10:35:131
111391340,0ptp4l0-21swapper/509:59:115
111391340,0ptp4l0-21swapper/012:18:310
111391320,0ptp4l0-21swapper/511:38:415
111391320,0ptp4l0-21swapper/110:34:161
111391320,0ptp4l0-21swapper/009:16:370
111391310,0ptp4l0-21swapper/409:00:204
111391310,0ptp4l0-21swapper/110:25:141
111391310,0ptp4l0-21swapper/109:33:561
111391310,0ptp4l0-21swapper/011:44:550
111391310,0ptp4l0-21swapper/011:35:120
111391310,0ptp4l0-21swapper/011:13:020
111391310,0ptp4l0-21swapper/009:45:110
111391310,0ptp4l0-21swapper/009:12:480
111391310,0ptp4l0-21swapper/007:25:170
111391300,3ptp4l0-21swapper/110:58:581
111391300,0ptp4l0-21swapper/511:29:435
111391300,0ptp4l0-21swapper/509:33:585
111391300,0ptp4l0-21swapper/411:17:244
111391300,0ptp4l0-21swapper/011:58:300
111391300,0ptp4l0-21swapper/011:34:570
111391300,0ptp4l0-21swapper/011:15:200
111391300,0ptp4l0-21swapper/010:58:050
111391300,0ptp4l0-21swapper/010:45:070
111391300,0ptp4l0-21swapper/010:41:080
111391300,0ptp4l0-21swapper/010:38:260
111391300,0ptp4l0-21swapper/010:38:260
111391300,0ptp4l0-21swapper/010:20:460
111391300,0ptp4l0-21swapper/010:17:590
111391300,0ptp4l0-21swapper/010:02:330
111391300,0ptp4l0-21swapper/009:37:250
111391300,0ptp4l0-21swapper/009:34:430
111391300,0ptp4l0-21swapper/009:26:070
111391290,2ptp4l0-21swapper/510:22:115
111391290,0ptp4l0-21swapper/510:16:085
111391290,0ptp4l0-21swapper/509:28:085
111391290,0ptp4l0-21swapper/508:50:015
111391290,0ptp4l0-21swapper/409:48:244
111391290,0ptp4l0-21swapper/012:37:040
111391290,0ptp4l0-21swapper/011:22:190
111391280,0ptp4l0-21swapper/412:29:084
111391280,0ptp4l0-21swapper/412:23:284
111391280,0ptp4l0-21swapper/409:28:504
111391280,0ptp4l0-21swapper/109:40:221
111391280,0ptp4l0-21swapper/011:50:100
111391280,0ptp4l0-21swapper/010:25:550
111391270,0ptp4l0-21swapper/512:15:215
111391270,0ptp4l0-21swapper/411:28:034
111391270,0ptp4l0-21swapper/410:49:094
111391270,0ptp4l0-21swapper/409:13:274
111391270,0ptp4l0-21swapper/407:15:124
111391270,0ptp4l0-21swapper/110:10:101
111391270,0ptp4l0-21swapper/012:33:560
111391270,0ptp4l0-21swapper/011:48:510
111391270,0ptp4l0-21swapper/010:05:040
111391270,0ptp4l0-21swapper/009:43:080
111391260,2ptp4l0-21swapper/111:38:421
111391260,0ptp4l0-21swapper/511:32:125
111391260,0ptp4l0-21swapper/511:12:175
111391260,0ptp4l0-21swapper/510:42:365
111391260,0ptp4l0-21swapper/112:06:531
111391260,0ptp4l0-21swapper/111:29:581
111391260,0ptp4l0-21swapper/107:23:001
111391260,0ptp4l0-21swapper/012:20:310
111391260,0ptp4l0-21swapper/012:11:260
111391260,0ptp4l0-21swapper/012:08:120
111391260,0ptp4l0-21swapper/011:05:540
111391260,0ptp4l0-21swapper/009:53:510
111391260,0ptp4l0-21swapper/009:23:060
111391260,0ptp4l0-21swapper/007:53:330
111391250,1ptp4l6604-21cat10:15:194
111391250,1ptp4l11174-21sed07:40:210
111391250,0ptp4l0-21swapper/512:33:305
111391250,0ptp4l0-21swapper/512:06:415
111391250,0ptp4l0-21swapper/510:57:155
111391250,0ptp4l0-21swapper/411:37:474
111391250,0ptp4l0-21swapper/411:20:204
111391250,0ptp4l0-21swapper/410:22:574
111391250,0ptp4l0-21swapper/410:09:074
111391250,0ptp4l0-21swapper/110:05:551
111391250,0ptp4l0-21swapper/109:13:381
111391250,0ptp4l0-21swapper/108:47:201
111391250,0ptp4l0-21swapper/108:11:161
111391250,0ptp4l0-21swapper/010:51:340
111391250,0ptp4l0-21swapper/008:51:420
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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