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2026-07-31 - 06:15

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 Jul 31, 2026 00:46:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
89612680,0sleep1231rcuc/100:39:591
111391640,25ptp4l0-21swapper/019:05:120
111391620,5ptp4l0-21swapper/419:06:394
74722600,0sleep7721ktimersoftd/723:50:557
262002600,0sleep00-21swapper/022:50:010
1881916036,7phc2sys0-21swapper/119:07:201
2545425938,6sleep70-21swapper/719:05:567
281692580,0sleep60-21swapper/619:14:596
225832550,0sleep00-21swapper/000:15:000
2566325241,7sleep20-21swapper/219:08:332
111391470,6ptp4l0-21swapper/619:05:106
2554524635,7sleep30-21swapper/319:07:043
2576624531,9sleep50-21swapper/519:09:555
111391320,4ptp4l0-21swapper/423:17:074
111391320,4ptp4l0-21swapper/423:17:064
111391320,0ptp4l0-21swapper/421:52:184
111391310,0ptp4l0-21swapper/423:25:144
111391310,0ptp4l0-21swapper/422:22:174
111391310,0ptp4l0-21swapper/121:24:221
111391310,0ptp4l0-21swapper/000:05:130
111391300,0ptp4l0-21swapper/723:15:037
111391300,0ptp4l0-21swapper/723:15:027
111391300,0ptp4l0-21swapper/423:30:074
111391300,0ptp4l0-21swapper/422:15:214
111391300,0ptp4l0-21swapper/420:45:164
111391300,0ptp4l0-21swapper/022:05:510
111391290,1ptp4l4477-21rm23:04:521
111391290,0ptp4l16815-21diskmemload23:38:100
111391290,0ptp4l0-21swapper/421:23:274
111391290,0ptp4l0-21swapper/400:29:054
111391290,0ptp4l0-21swapper/123:24:391
111391290,0ptp4l0-21swapper/021:50:440
111391290,0ptp4l0-21swapper/000:40:000
111391280,0ptp4l0-21swapper/423:41:514
111391280,0ptp4l0-21swapper/423:37:294
111391280,0ptp4l0-21swapper/421:15:114
111391280,0ptp4l0-21swapper/421:13:394
111391280,0ptp4l0-21swapper/122:58:041
111391280,0ptp4l0-21swapper/122:51:501
111391280,0ptp4l0-21swapper/023:46:500
111391280,0ptp4l0-21swapper/021:40:150
111391280,0ptp4l0-21swapper/021:37:210
111391270,0ptp4l0-21swapper/422:37:094
111391270,0ptp4l0-21swapper/400:39:164
111391270,0ptp4l0-21swapper/222:04:342
111391270,0ptp4l0-21swapper/023:30:130
111391270,0ptp4l0-21swapper/022:38:420
111391270,0ptp4l0-21swapper/021:15:100
111391270,0ptp4l0-21swapper/021:13:360
111391270,0ptp4l0-21swapper/000:31:150
111391270,0ptp4l0-21swapper/000:24:290
111391260,1ptp4l16632-21grep19:55:205
111391260,0ptp4l0-21swapper/721:05:147
111391260,0ptp4l0-21swapper/522:50:395
111391260,0ptp4l0-21swapper/423:03:334
111391260,0ptp4l0-21swapper/422:55:184
111391260,0ptp4l0-21swapper/421:35:144
111391260,0ptp4l0-21swapper/421:25:414
111391260,0ptp4l0-21swapper/123:58:011
111391260,0ptp4l0-21swapper/100:30:321
111391260,0ptp4l0-21swapper/023:50:020
111391260,0ptp4l0-21swapper/023:28:580
111391260,0ptp4l0-21swapper/023:05:280
111391260,0ptp4l0-21swapper/022:55:500
111391260,0ptp4l0-21swapper/022:27:040
111391260,0ptp4l0-21swapper/022:16:330
111391260,0ptp4l0-21swapper/000:25:090
111391250,4ptp4l0-21swapper/400:15:144
111391250,1ptp4l16202-21df23:20:114
111391250,1ptp4l14063-21unixbench_multi21:00:200
111391250,0ptp4l0-21swapper/722:42:027
111391250,0ptp4l0-21swapper/423:55:124
111391250,0ptp4l0-21swapper/423:50:064
111391250,0ptp4l0-21swapper/422:50:194
111391250,0ptp4l0-21swapper/422:28:334
111391250,0ptp4l0-21swapper/421:55:384
111391250,0ptp4l0-21swapper/421:43:364
111391250,0ptp4l0-21swapper/400:01:434
111391250,0ptp4l0-21swapper/323:51:103
111391250,0ptp4l0-21swapper/322:20:043
111391250,0ptp4l0-21swapper/120:31:411
111391250,0ptp4l0-21swapper/120:30:011
111391250,0ptp4l0-21swapper/119:40:001
111391250,0ptp4l0-21swapper/022:40:190
111391250,0ptp4l0-21swapper/022:30:120
111391250,0ptp4l0-21swapper/020:00:200
111391240,2ptp4l12309-21ssh23:59:310
111391240,2ptp4l0-21swapper/521:27:585
111391240,2ptp4l0-21swapper/121:40:121
111391240,1ptp4l4285-21/usr/sbin/munin22:20:170
111391240,1ptp4l11958-21ssh21:45:190
111391240,1ptp4l1068-21runrttasks19:15:175
111391240,0ptp4l0-21swapper/522:09:185
111391240,0ptp4l0-21swapper/423:48:024
111391240,0ptp4l0-21swapper/422:45:064
111391240,0ptp4l0-21swapper/422:41:084
111391240,0ptp4l0-21swapper/422:10:244
111391240,0ptp4l0-21swapper/422:00:214
111391240,0ptp4l0-21swapper/421:45:584
111391240,0ptp4l0-21swapper/420:25:174
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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