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2025-12-11 - 07:04

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 Dec 11, 2025 00:46:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2120917048,6phc2sys0-21swapper/719:06:357
2120917048,6phc2sys0-21swapper/719:06:357
114091640,5ptp4l0-21swapper/019:06:300
114091640,5ptp4l0-21swapper/019:06:290
3091326353,6sleep60-21swapper/619:07:386
3091326353,6sleep60-21swapper/619:07:386
114091630,5ptp4l0-21swapper/419:05:224
114091630,5ptp4l0-21swapper/419:05:224
3098326142,6sleep30-21swapper/319:08:313
3098326142,6sleep30-21swapper/319:08:313
127282590,0sleep20-21swapper/220:46:162
3086225645,7sleep10-21swapper/119:07:011
3086225645,7sleep10-21swapper/119:07:011
3100925039,6sleep20-21swapper/219:08:542
3100925039,6sleep20-21swapper/219:08:542
3094824636,6sleep50-21swapper/519:08:095
3094824636,6sleep50-21swapper/519:08:095
114091330,0ptp4l0-21swapper/619:25:156
114091320,0ptp4l0-21swapper/723:39:257
114091320,0ptp4l0-21swapper/622:24:336
114091320,0ptp4l0-21swapper/221:16:232
114091310,0ptp4l0-21swapper/700:24:037
114091310,0ptp4l0-21swapper/700:24:027
114091310,0ptp4l0-21swapper/600:14:356
114091310,0ptp4l0-21swapper/421:39:284
114091310,0ptp4l0-21swapper/121:10:151
114091300,0ptp4l0-21swapper/623:20:226
114091300,0ptp4l0-21swapper/423:13:514
114091300,0ptp4l0-21swapper/221:47:012
114091300,0ptp4l0-21swapper/221:47:012
114091300,0ptp4l0-21swapper/220:40:152
114091300,0ptp4l0-21swapper/100:25:201
114091300,0ptp4l0-21swapper/000:30:520
114091290,2ptp4l0-21swapper/723:46:597
114091290,0ptp4l0-21swapper/722:01:017
114091290,0ptp4l0-21swapper/622:41:326
114091290,0ptp4l0-21swapper/620:15:156
114091290,0ptp4l0-21swapper/422:21:014
114091290,0ptp4l0-21swapper/120:45:171
114091290,0ptp4l0-21swapper/021:26:370
114091280,0ptp4l0-21swapper/623:06:596
114091280,0ptp4l0-21swapper/621:41:366
114091280,0ptp4l0-21swapper/621:41:366
114091280,0ptp4l0-21swapper/422:15:294
114091280,0ptp4l0-21swapper/400:28:134
114091280,0ptp4l0-21swapper/222:59:032
114091280,0ptp4l0-21swapper/219:55:202
114091270,0ptp4l0-21swapper/723:14:577
114091270,0ptp4l0-21swapper/721:39:427
114091270,0ptp4l0-21swapper/700:39:077
114091270,0ptp4l0-21swapper/622:10:146
114091270,0ptp4l0-21swapper/622:09:066
114091270,0ptp4l0-21swapper/621:25:536
114091270,0ptp4l0-21swapper/600:27:586
114091270,0ptp4l0-21swapper/421:17:074
114091270,0ptp4l0-21swapper/323:36:133
114091270,0ptp4l0-21swapper/223:44:292
114091270,0ptp4l0-21swapper/222:42:592
114091270,0ptp4l0-21swapper/221:50:472
114091270,0ptp4l0-21swapper/100:13:271
114091260,4ptp4l0-21swapper/421:12:364
114091260,0ptp4l22236-21diskmemload23:15:356
114091260,0ptp4l22236-21diskmemload22:10:112
114091260,0ptp4l0-21swapper/722:30:587
114091260,0ptp4l0-21swapper/623:44:376
114091260,0ptp4l0-21swapper/623:37:326
114091260,0ptp4l0-21swapper/622:57:266
114091260,0ptp4l0-21swapper/622:15:436
114091260,0ptp4l0-21swapper/621:47:376
114091260,0ptp4l0-21swapper/621:47:366
114091260,0ptp4l0-21swapper/222:45:382
114091260,0ptp4l0-21swapper/200:14:142
114091260,0ptp4l0-21swapper/123:53:191
114091260,0ptp4l0-21swapper/122:04:351
114091260,0ptp4l0-21swapper/121:53:231
114091250,8ptp4l0-21swapper/219:31:372
114091250,1ptp4l18140-21latency_hist19:50:022
114091250,0ptp4l0-21swapper/723:51:557
114091250,0ptp4l0-21swapper/621:16:166
114091250,0ptp4l0-21swapper/621:08:346
114091250,0ptp4l0-21swapper/620:12:306
114091250,0ptp4l0-21swapper/419:30:134
114091250,0ptp4l0-21swapper/419:19:294
114091250,0ptp4l0-21swapper/223:16:312
114091250,0ptp4l0-21swapper/221:25:242
114091250,0ptp4l0-21swapper/123:25:011
114091250,0ptp4l0-21swapper/123:06:481
114091250,0ptp4l0-21swapper/121:59:071
114091250,0ptp4l0-21swapper/119:13:391
114091250,0ptp4l0-21swapper/100:19:321
114091250,0ptp4l0-21swapper/100:19:311
114091250,0ptp4l0-21swapper/023:21:530
114091250,0ptp4l0-21swapper/022:34:410
114091250,0ptp4l0-21swapper/022:23:030
114091250,0ptp4l0-21swapper/022:05:170
114091240,1ptp4l21013-21sed21:05:155
114091240,1ptp4l20826-21ps21:05:141
114091240,1ptp4l15528-21diskstats22:30:122
114091240,1ptp4l14970-21wc19:40:216
114091240,0ptp4l0-21swapper/723:41:337
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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