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2026-08-03 - 06:27

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 Mon Aug 03, 2026 00:46:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
111391620,31ptp4l0-21swapper/019:07:160
111391610,5ptp4l0-21swapper/519:06:515
111391580,5ptp4l0-21swapper/419:07:364
1018425846,7sleep10-21swapper/119:08:251
995325747,6sleep20-21swapper/219:05:312
1028925141,6sleep70-21swapper/719:09:457
908025029,16sleep60-21swapper/619:05:196
1003124634,7sleep30-21swapper/319:06:283
111391390,0ptp4l0-21swapper/419:55:134
111391320,0ptp4l0-21swapper/423:15:204
111391320,0ptp4l0-21swapper/421:35:154
111391310,0ptp4l0-21swapper/421:12:194
111391310,0ptp4l0-21swapper/021:40:140
111391300,0ptp4l0-21swapper/523:04:495
111391300,0ptp4l0-21swapper/523:04:495
111391300,0ptp4l0-21swapper/423:36:024
111391300,0ptp4l0-21swapper/422:48:014
111391300,0ptp4l0-21swapper/123:48:181
111391300,0ptp4l0-21swapper/121:21:591
111391300,0ptp4l0-21swapper/022:02:310
111391300,0ptp4l0-21swapper/020:30:190
111391300,0ptp4l0-21swapper/000:15:460
111391290,0ptp4l0-21swapper/522:32:065
111391290,0ptp4l0-21swapper/522:14:125
111391290,0ptp4l0-21swapper/423:56:114
111391290,0ptp4l0-21swapper/423:02:194
111391290,0ptp4l0-21swapper/423:02:194
111391290,0ptp4l0-21swapper/400:21:034
111391290,0ptp4l0-21swapper/100:17:011
111391290,0ptp4l0-21swapper/023:57:310
111391290,0ptp4l0-21swapper/022:56:120
111391290,0ptp4l0-21swapper/022:56:120
111391290,0ptp4l0-21swapper/022:19:410
111391280,0ptp4l0-21swapper/700:05:187
111391280,0ptp4l0-21swapper/623:54:236
111391280,0ptp4l0-21swapper/523:46:185
111391280,0ptp4l0-21swapper/422:15:244
111391280,0ptp4l0-21swapper/421:26:054
111391280,0ptp4l0-21swapper/400:36:374
111391280,0ptp4l0-21swapper/322:27:093
111391280,0ptp4l0-21swapper/123:50:371
111391280,0ptp4l0-21swapper/122:11:391
111391280,0ptp4l0-21swapper/022:52:280
111391280,0ptp4l0-21swapper/022:07:540
111391280,0ptp4l0-21swapper/021:00:170
111391280,0ptp4l0-21swapper/000:34:530
111391280,0ptp4l0-21swapper/000:26:040
10604992825,1cyclictest29287-21taskset19:49:344
111391270,0ptp4l7679-21ssh00:13:280
111391270,0ptp4l0-21swapper/721:18:567
111391270,0ptp4l0-21swapper/519:54:425
111391270,0ptp4l0-21swapper/422:23:164
111391270,0ptp4l0-21swapper/422:03:464
111391270,0ptp4l0-21swapper/421:47:134
111391270,0ptp4l0-21swapper/421:41:374
111391270,0ptp4l0-21swapper/323:06:023
111391270,0ptp4l0-21swapper/322:09:043
111391270,0ptp4l0-21swapper/121:58:171
111391270,0ptp4l0-21swapper/023:53:260
111391270,0ptp4l0-21swapper/023:27:060
111391270,0ptp4l0-21swapper/023:07:390
111391270,0ptp4l0-21swapper/023:01:290
111391270,0ptp4l0-21swapper/023:01:290
111391270,0ptp4l0-21swapper/022:44:180
111391270,0ptp4l0-21swapper/022:39:050
111391270,0ptp4l0-21swapper/022:34:540
111391270,0ptp4l0-21swapper/022:13:080
111391270,0ptp4l0-21swapper/021:56:120
111391270,0ptp4l0-21swapper/021:36:390
111391270,0ptp4l0-21swapper/021:31:270
111391270,0ptp4l0-21swapper/021:21:000
111391270,0ptp4l0-21swapper/021:05:160
111391270,0ptp4l0-21swapper/000:37:120
111391270,0ptp4l0-21swapper/000:21:020
111391260,0ptp4l0-21swapper/523:59:575
111391260,0ptp4l0-21swapper/523:25:145
111391260,0ptp4l0-21swapper/521:42:025
111391260,0ptp4l0-21swapper/500:01:145
111391260,0ptp4l0-21swapper/423:22:414
111391260,0ptp4l0-21swapper/421:34:184
111391260,0ptp4l0-21swapper/121:14:231
111391260,0ptp4l0-21swapper/100:09:471
111391260,0ptp4l0-21swapper/023:38:300
111391260,0ptp4l0-21swapper/023:14:470
111391260,0ptp4l0-21swapper/021:50:520
111391260,0ptp4l0-21swapper/021:46:210
111391250,3ptp4l321ktimersoftd/221:27:162
111391250,0ptp4l0-21swapper/521:19:065
111391250,0ptp4l0-21swapper/520:25:135
111391250,0ptp4l0-21swapper/520:05:445
111391250,0ptp4l0-21swapper/422:35:114
111391250,0ptp4l0-21swapper/421:17:524
111391250,0ptp4l0-21swapper/421:05:134
111391250,0ptp4l0-21swapper/400:11:574
111391250,0ptp4l0-21swapper/400:06:084
111391250,0ptp4l0-21swapper/321:18:413
111391250,0ptp4l0-21swapper/023:31:540
111391250,0ptp4l0-21swapper/023:20:120
111391250,0ptp4l0-21swapper/023:19:410
111391250,0ptp4l0-21swapper/022:45:520
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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