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2026-08-21 - 12:56

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 Aug 21, 2026 00:46:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
111391640,30ptp4l0-21swapper/019:09:520
111391620,5ptp4l0-21swapper/119:08:111
111391610,5ptp4l0-21swapper/519:07:475
111391610,30ptp4l0-21swapper/219:09:322
1881915948,6phc2sys0-21swapper/419:09:084
231682560,0sleep20-21swapper/221:54:182
39925544,6sleep70-21swapper/719:09:257
40424938,7sleep30-21swapper/319:09:293
3270524737,6sleep60-21swapper/619:07:316
754994623,11cyclictest24782-21munin-run23:30:002
111391350,0ptp4l0-21swapper/422:06:274
111391320,0ptp4l0-21swapper/323:19:003
111391300,0ptp4l0-21swapper/523:13:395
111391300,0ptp4l0-21swapper/522:25:355
111391300,0ptp4l0-21swapper/500:01:515
111391300,0ptp4l0-21swapper/023:55:200
111391290,0ptp4l0-21swapper/523:15:195
111391290,0ptp4l0-21swapper/521:50:215
111391290,0ptp4l0-21swapper/521:25:195
111391290,0ptp4l0-21swapper/500:39:215
111391290,0ptp4l0-21swapper/123:22:551
111391290,0ptp4l0-21swapper/023:32:450
111391280,0ptp4l0-21swapper/523:38:115
111391280,0ptp4l0-21swapper/522:06:065
111391280,0ptp4l0-21swapper/521:49:565
111391280,0ptp4l0-21swapper/021:56:450
111391280,0ptp4l0-21swapper/021:47:220
111391270,0ptp4l0-21swapper/523:09:455
111391270,0ptp4l0-21swapper/500:33:295
111391270,0ptp4l0-21swapper/500:17:485
111391270,0ptp4l0-21swapper/421:30:534
111391270,0ptp4l0-21swapper/323:08:113
111391270,0ptp4l0-21swapper/122:41:091
111391270,0ptp4l0-21swapper/023:42:240
111391270,0ptp4l0-21swapper/022:28:110
111391260,0ptp4l0-21swapper/723:05:497
111391260,0ptp4l0-21swapper/522:56:235
111391260,0ptp4l0-21swapper/522:39:245
111391260,0ptp4l0-21swapper/521:44:025
111391260,0ptp4l0-21swapper/519:49:065
111391260,0ptp4l0-21swapper/422:54:234
111391260,0ptp4l0-21swapper/421:55:524
111391260,0ptp4l0-21swapper/400:34:044
111391260,0ptp4l0-21swapper/223:55:132
111391260,0ptp4l0-21swapper/122:34:031
111391260,0ptp4l0-21swapper/023:03:270
111391260,0ptp4l0-21swapper/022:45:450
111391260,0ptp4l0-21swapper/021:54:370
111391250,1ptp4l9980-21df_inode21:35:136
111391250,1ptp4l3329-21wc22:10:211
111391250,1ptp4l26939-21irqstats22:45:175
111391250,1ptp4l20604-21irqstats19:50:151
111391250,1ptp4l15923-21memory20:50:161
111391250,0ptp4l0-21swapper/720:45:007
111391250,0ptp4l0-21swapper/623:47:076
111391250,0ptp4l0-21swapper/623:47:066
111391250,0ptp4l0-21swapper/523:50:155
111391250,0ptp4l0-21swapper/522:30:125
111391250,0ptp4l0-21swapper/521:05:175
111391250,0ptp4l0-21swapper/521:05:175
111391250,0ptp4l0-21swapper/520:19:025
111391250,0ptp4l0-21swapper/519:15:135
111391250,0ptp4l0-21swapper/423:20:134
111391250,0ptp4l0-21swapper/422:20:004
111391250,0ptp4l0-21swapper/322:07:353
111391250,0ptp4l0-21swapper/300:32:133
111391250,0ptp4l0-21swapper/200:25:182
111391250,0ptp4l0-21swapper/122:20:131
111391250,0ptp4l0-21swapper/121:53:551
111391250,0ptp4l0-21swapper/121:30:141
111391250,0ptp4l0-21swapper/120:35:121
111391250,0ptp4l0-21swapper/119:40:151
111391250,0ptp4l0-21swapper/021:34:400
111391240,1ptp4l3996-21idleruntime20:25:132
111391240,1ptp4l32604-21smart_sda21:20:195
111391240,1ptp4l27759-21interrupts22:00:161
111391240,1ptp4l23930-21diskmemload00:05:161
111391240,1ptp4l2242-21ssh22:55:194
111391240,1ptp4l20679-21smartctl00:10:125
111391240,1ptp4l11537-21diskstats23:10:111
111391240,1ptp4l0-21swapper/519:25:165
111391240,0ptp4l0-21swapper/700:07:067
111391240,0ptp4l0-21swapper/522:44:555
111391240,0ptp4l0-21swapper/522:20:205
111391240,0ptp4l0-21swapper/521:30:135
111391240,0ptp4l0-21swapper/520:05:165
111391240,0ptp4l0-21swapper/519:55:135
111391240,0ptp4l0-21swapper/519:20:055
111391240,0ptp4l0-21swapper/500:20:135
111391240,0ptp4l0-21swapper/500:05:215
111391240,0ptp4l0-21swapper/422:04:304
111391240,0ptp4l0-21swapper/420:41:284
111391240,0ptp4l0-21swapper/223:13:102
111391240,0ptp4l0-21swapper/220:55:122
111391240,0ptp4l0-21swapper/123:45:181
111391240,0ptp4l0-21swapper/123:45:171
111391240,0ptp4l0-21swapper/123:35:211
111391240,0ptp4l0-21swapper/123:31:091
111391240,0ptp4l0-21swapper/123:05:171
111391240,0ptp4l0-21swapper/121:48:171
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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