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2026-05-28 - 12:19

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 28, 2026 00:46:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
111391670,5ptp4l0-21swapper/519:05:205
111391630,31ptp4l0-21swapper/019:09:290
111391620,5ptp4l0-21swapper/419:08:054
111391620,31ptp4l0-21swapper/119:08:071
2513526151,6sleep20-21swapper/219:05:342
110212590,0sleep30-21swapper/322:30:013
110212590,0sleep30-21swapper/322:30:003
109392590,0sleep20-21swapper/219:45:152
109392590,0sleep20-21swapper/219:45:142
96312580,0sleep00-21swapper/023:10:180
2525025847,6sleep70-21swapper/719:07:087
2527525635,6sleep60-21swapper/619:07:236
102342560,0sleep10-21swapper/122:27:501
102342560,0sleep10-21swapper/122:27:491
240642540,0sleep10-21swapper/122:02:191
2514524635,7sleep30-21swapper/319:05:433
79052450,1sleep09-21ksoftirqd/023:09:550
111391340,0ptp4l0-21swapper/423:20:234
111391330,0ptp4l0-21swapper/422:03:334
111391330,0ptp4l0-21swapper/000:20:170
111391330,0ptp4l0-21swapper/000:12:330
111391320,0ptp4l0-21swapper/522:34:235
111391320,0ptp4l0-21swapper/520:25:105
111391320,0ptp4l0-21swapper/423:45:164
111391320,0ptp4l0-21swapper/420:20:124
111391320,0ptp4l0-21swapper/021:50:110
111391320,0ptp4l0-21swapper/021:14:150
111391310,6ptp4l0-21swapper/421:18:534
111391310,0ptp4l0-21swapper/521:15:555
111391310,0ptp4l0-21swapper/023:56:510
111391310,0ptp4l0-21swapper/022:51:490
111391310,0ptp4l0-21swapper/020:20:190
111391300,0ptp4l0-21swapper/522:49:515
111391300,0ptp4l0-21swapper/500:16:475
111391300,0ptp4l0-21swapper/422:25:174
111391300,0ptp4l0-21swapper/422:25:164
111391300,0ptp4l0-21swapper/421:27:164
111391300,0ptp4l0-21swapper/400:28:244
111391300,0ptp4l0-21swapper/023:51:050
111391300,0ptp4l0-21swapper/021:19:500
111391300,0ptp4l0-21swapper/000:16:100
111391290,0ptp4l0-21swapper/522:37:535
111391290,0ptp4l0-21swapper/423:54:484
111391290,0ptp4l0-21swapper/423:08:164
111391290,0ptp4l0-21swapper/422:21:574
111391290,0ptp4l0-21swapper/422:21:574
111391290,0ptp4l0-21swapper/400:09:094
111391290,0ptp4l0-21swapper/123:22:431
111391290,0ptp4l0-21swapper/023:33:440
111391290,0ptp4l0-21swapper/023:03:420
111391290,0ptp4l0-21swapper/022:23:210
111391290,0ptp4l0-21swapper/022:23:200
111391290,0ptp4l0-21swapper/000:36:150
111391280,0ptp4l0-21swapper/523:27:535
111391280,0ptp4l0-21swapper/500:11:455
111391280,0ptp4l0-21swapper/423:56:294
111391280,0ptp4l0-21swapper/422:39:404
111391280,0ptp4l0-21swapper/421:52:424
111391280,0ptp4l0-21swapper/421:37:164
111391280,0ptp4l0-21swapper/421:30:194
111391280,0ptp4l0-21swapper/421:23:174
111391280,0ptp4l0-21swapper/121:36:041
111391280,0ptp4l0-21swapper/023:41:160
111391280,0ptp4l0-21swapper/022:03:050
111391280,0ptp4l0-21swapper/021:44:000
111391270,3ptp4l0-21swapper/400:30:144
111391270,0ptp4l0-21swapper/522:54:505
111391270,0ptp4l0-21swapper/521:39:545
111391270,0ptp4l0-21swapper/423:15:414
111391270,0ptp4l0-21swapper/422:06:414
111391270,0ptp4l0-21swapper/221:24:062
111391270,0ptp4l0-21swapper/200:36:512
111391270,0ptp4l0-21swapper/022:18:460
111391270,0ptp4l0-21swapper/021:33:510
111391270,0ptp4l0-21swapper/000:07:570
111391260,8ptp4l0-21swapper/022:34:120
111391260,0ptp4l0-21swapper/523:36:575
111391260,0ptp4l0-21swapper/521:33:245
111391260,0ptp4l0-21swapper/422:56:524
111391260,0ptp4l0-21swapper/421:10:134
111391260,0ptp4l0-21swapper/420:47:154
111391260,0ptp4l0-21swapper/419:55:174
111391260,0ptp4l0-21swapper/400:21:074
111391260,0ptp4l0-21swapper/223:29:442
111391260,0ptp4l0-21swapper/222:23:292
111391260,0ptp4l0-21swapper/222:23:282
111391260,0ptp4l0-21swapper/022:49:120
111391260,0ptp4l0-21swapper/021:21:540
111391260,0ptp4l0-21swapper/000:31:130
111391250,1ptp4l26348-21latency22:05:160
111391250,1ptp4l26249-21sh19:10:125
111391250,1ptp4l2577499cyclictest19:22:264
111391250,1ptp4l23475-21ps23:30:134
111391250,0ptp4l0-21swapper/621:13:266
111391250,0ptp4l0-21swapper/523:18:465
111391250,0ptp4l0-21swapper/521:43:235
111391250,0ptp4l0-21swapper/423:42:094
111391250,0ptp4l0-21swapper/420:52:054
111391250,0ptp4l0-21swapper/223:04:152
111391250,0ptp4l0-21swapper/119:10:171
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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