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2026-05-21 - 04:41

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 Thu May 21, 2026 00:46:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
226092620,1sleep09-21ksoftirqd/000:26:550
281742590,0sleep4471rcuc/423:05:124
1881915633,7phc2sys0-21swapper/119:07:491
1536725645,6sleep70-21swapper/719:06:387
111391530,6ptp4l0-21swapper/019:05:080
1527125140,7sleep20-21swapper/219:05:212
1550224938,6sleep40-21swapper/419:08:184
1552224838,6sleep60-21swapper/619:08:376
1550324736,7sleep50-21swapper/519:08:205
1535424635,7sleep30-21swapper/319:06:263
111391360,8ptp4l0-21swapper/522:30:005
111391360,4ptp4l0-21swapper/319:10:153
111391330,0ptp4l0-21swapper/422:32:354
111391330,0ptp4l0-21swapper/421:10:214
111391320,0ptp4l0-21swapper/423:03:354
111391320,0ptp4l0-21swapper/000:20:430
111391310,0ptp4l0-21swapper/421:49:454
111391310,0ptp4l0-21swapper/021:50:140
111391300,1ptp4l5708-21taskset23:18:581
111391300,0ptp4l0-21swapper/721:30:127
111391300,0ptp4l0-21swapper/523:12:415
111391300,0ptp4l0-21swapper/422:54:054
111391300,0ptp4l0-21swapper/422:36:494
111391300,0ptp4l0-21swapper/422:02:474
111391300,0ptp4l0-21swapper/421:41:014
111391300,0ptp4l0-21swapper/420:50:134
111391300,0ptp4l0-21swapper/122:30:201
111391300,0ptp4l0-21swapper/023:45:160
111391300,0ptp4l0-21swapper/023:03:140
111391300,0ptp4l0-21swapper/022:51:380
111391300,0ptp4l0-21swapper/022:34:100
111391300,0ptp4l0-21swapper/022:26:430
111391300,0ptp4l0-21swapper/021:20:490
111391300,0ptp4l0-21swapper/021:05:190
111391300,0ptp4l0-21swapper/000:30:120
111391290,0ptp4l0-21swapper/423:45:584
111391290,0ptp4l0-21swapper/423:40:134
111391290,0ptp4l0-21swapper/423:22:024
111391290,0ptp4l0-21swapper/422:43:074
111391290,0ptp4l0-21swapper/421:55:114
111391290,0ptp4l0-21swapper/421:33:444
111391290,0ptp4l0-21swapper/400:38:054
111391290,0ptp4l0-21swapper/400:33:514
111391290,0ptp4l0-21swapper/400:15:154
111391290,0ptp4l0-21swapper/121:33:021
111391290,0ptp4l0-21swapper/023:40:220
111391290,0ptp4l0-21swapper/022:23:170
111391290,0ptp4l0-21swapper/022:17:430
111391290,0ptp4l0-21swapper/022:17:430
111391290,0ptp4l0-21swapper/021:57:060
111391290,0ptp4l0-21swapper/021:46:300
111391290,0ptp4l0-21swapper/021:32:260
111391280,3ptp4l0-21swapper/421:15:454
111391280,0ptp4l0-21swapper/523:38:325
111391280,0ptp4l0-21swapper/522:01:135
111391280,0ptp4l0-21swapper/521:37:125
111391280,0ptp4l0-21swapper/422:59:194
111391280,0ptp4l0-21swapper/421:36:404
111391280,0ptp4l0-21swapper/419:36:104
111391280,0ptp4l0-21swapper/323:05:193
111391280,0ptp4l0-21swapper/322:40:073
111391280,0ptp4l0-21swapper/123:47:221
111391280,0ptp4l0-21swapper/023:10:230
111391280,0ptp4l0-21swapper/022:48:290
111391280,0ptp4l0-21swapper/022:08:390
111391280,0ptp4l0-21swapper/022:02:400
111391280,0ptp4l0-21swapper/021:41:090
111391280,0ptp4l0-21swapper/000:19:140
111391270,3ptp4l0-21swapper/023:08:090
111391270,0ptp4l0-21swapper/523:50:235
111391270,0ptp4l0-21swapper/521:27:305
111391270,0ptp4l0-21swapper/500:32:235
111391270,0ptp4l0-21swapper/500:17:005
111391270,0ptp4l0-21swapper/423:58:484
111391270,0ptp4l0-21swapper/423:11:224
111391270,0ptp4l0-21swapper/421:50:044
111391270,0ptp4l0-21swapper/421:28:194
111391270,0ptp4l0-21swapper/122:59:291
111391270,0ptp4l0-21swapper/119:45:111
111391270,0ptp4l0-21swapper/021:29:150
111391270,0ptp4l0-21swapper/021:17:140
111391270,0ptp4l0-21swapper/021:13:530
111391270,0ptp4l0-21swapper/000:05:540
111391260,3ptp4l0-21swapper/420:59:104
111391260,1ptp4l0-21swapper/522:30:105
111391260,0ptp4l0-21swapper/721:29:257
111391260,0ptp4l0-21swapper/522:46:155
111391260,0ptp4l0-21swapper/522:20:355
111391260,0ptp4l0-21swapper/520:20:135
111391260,0ptp4l0-21swapper/423:50:174
111391260,0ptp4l0-21swapper/422:45:124
111391260,0ptp4l0-21swapper/420:30:574
111391260,0ptp4l0-21swapper/419:20:144
111391260,0ptp4l0-21swapper/419:15:104
111391260,0ptp4l0-21swapper/400:22:434
111391260,0ptp4l0-21swapper/400:08:394
111391260,0ptp4l0-21swapper/321:30:243
111391260,0ptp4l0-21swapper/122:25:021
111391260,0ptp4l0-21swapper/121:59:171
111391260,0ptp4l0-21swapper/121:40:041
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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