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2026-05-22 - 05:26

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 May 22, 2026 00:46:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
111391680,35ptp4l0-21swapper/119:07:031
195522660,0sleep00-21swapper/021:52:160
2786526544,6sleep70-21swapper/719:09:097
111391640,30ptp4l0-21swapper/019:06:180
111391610,5ptp4l0-21swapper/519:07:105
111391600,5ptp4l0-21swapper/419:09:314
111391580,6ptp4l0-21swapper/619:06:146
39872570,0sleep40-21swapper/419:25:154
111391550,5ptp4l0-21swapper/219:05:252
2762924735,7sleep30-21swapper/319:06:093
111391360,0ptp4l0-21swapper/420:25:164
111391330,0ptp4l0-21swapper/021:27:040
111391330,0ptp4l0-21swapper/019:40:000
111391320,0ptp4l13394-21ssh22:28:014
111391320,0ptp4l0-21swapper/219:55:002
111391310,0ptp4l0-21swapper/423:10:144
111391310,0ptp4l0-21swapper/423:10:144
111391310,0ptp4l0-21swapper/123:45:171
111391300,3ptp4l0-21swapper/423:20:184
111391300,0ptp4l0-21swapper/520:50:165
111391300,0ptp4l0-21swapper/422:50:174
111391300,0ptp4l0-21swapper/422:23:174
111391300,0ptp4l0-21swapper/022:17:240
111391300,0ptp4l0-21swapper/021:20:010
111391290,6ptp4l0-21swapper/421:07:334
111391290,0ptp4l0-21swapper/423:41:194
111391290,0ptp4l0-21swapper/421:30:544
111391290,0ptp4l0-21swapper/400:36:164
111391290,0ptp4l0-21swapper/220:35:112
111391290,0ptp4l0-21swapper/220:35:102
111391290,0ptp4l0-21swapper/100:38:071
111391290,0ptp4l0-21swapper/023:10:100
111391290,0ptp4l0-21swapper/023:10:090
111391290,0ptp4l0-21swapper/022:55:500
111391280,0ptp4l0-21swapper/521:14:535
111391280,0ptp4l0-21swapper/500:07:135
111391280,0ptp4l0-21swapper/423:19:564
111391280,0ptp4l0-21swapper/421:12:304
111391280,0ptp4l0-21swapper/123:27:531
111391280,0ptp4l0-21swapper/021:12:050
111391280,0ptp4l0-21swapper/000:33:360
111391280,0ptp4l0-21swapper/000:02:360
111391270,5ptp4l31745-21phc2sys-jitter21:25:175
111391270,2ptp4l0-21swapper/521:15:165
111391270,1ptp4l19665-21df21:10:121
111391270,0ptp4l18961-21diskmemload00:16:264
111391270,0ptp4l121rcu_preempt22:32:024
111391270,0ptp4l0-21swapper/523:07:535
111391270,0ptp4l0-21swapper/522:39:585
111391270,0ptp4l0-21swapper/500:38:195
111391270,0ptp4l0-21swapper/500:31:035
111391270,0ptp4l0-21swapper/423:53:314
111391270,0ptp4l0-21swapper/421:53:554
111391270,0ptp4l0-21swapper/421:28:074
111391270,0ptp4l0-21swapper/400:30:004
111391270,0ptp4l0-21swapper/123:31:261
111391270,0ptp4l0-21swapper/123:07:461
111391270,0ptp4l0-21swapper/023:54:490
111391270,0ptp4l0-21swapper/000:39:140
111391270,0ptp4l0-21swapper/000:19:250
111391260,0ptp4l0-21swapper/523:13:225
111391260,0ptp4l0-21swapper/523:13:215
111391260,0ptp4l0-21swapper/522:34:345
111391260,0ptp4l0-21swapper/520:17:005
111391260,0ptp4l0-21swapper/423:58:404
111391260,0ptp4l0-21swapper/422:15:404
111391260,0ptp4l0-21swapper/421:35:124
111391260,0ptp4l0-21swapper/421:19:004
111391260,0ptp4l0-21swapper/400:01:264
111391260,0ptp4l0-21swapper/122:34:591
111391260,0ptp4l0-21swapper/023:57:350
111391260,0ptp4l0-21swapper/023:28:030
111391260,0ptp4l0-21swapper/023:15:550
111391260,0ptp4l0-21swapper/023:04:300
111391260,0ptp4l0-21swapper/022:09:300
111391260,0ptp4l0-21swapper/021:55:130
111391250,0ptp4l0-21swapper/523:35:475
111391250,0ptp4l0-21swapper/522:47:475
111391250,0ptp4l0-21swapper/500:13:215
111391250,0ptp4l0-21swapper/423:05:124
111391250,0ptp4l0-21swapper/422:45:164
111391250,0ptp4l0-21swapper/422:40:434
111391250,0ptp4l0-21swapper/422:00:154
111391250,0ptp4l0-21swapper/421:45:144
111391250,0ptp4l0-21swapper/421:24:084
111391250,0ptp4l0-21swapper/419:15:004
111391250,0ptp4l0-21swapper/400:26:554
111391250,0ptp4l0-21swapper/400:21:034
111391250,0ptp4l0-21swapper/122:46:291
111391250,0ptp4l0-21swapper/122:00:181
111391250,0ptp4l0-21swapper/121:00:131
111391250,0ptp4l0-21swapper/100:35:001
111391250,0ptp4l0-21swapper/100:12:261
111391250,0ptp4l0-21swapper/100:06:181
111391250,0ptp4l0-21swapper/019:50:140
111391250,0ptp4l0-21swapper/019:49:590
111391250,0ptp4l0-21swapper/019:30:180
111391250,0ptp4l0-21swapper/019:20:320
175052240,0sleep3391rcuc/322:34:083
111391240,2ptp4l0-21swapper/122:41:361
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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