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2026-03-17 - 06:10

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 Tue Mar 17, 2026 00:46:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
111391670,36ptp4l0-21swapper/119:07:161
70162610,0sleep70-21swapper/721:35:157
111391610,30ptp4l0-21swapper/019:05:250
131452590,0sleep60-21swapper/621:45:006
111391580,6ptp4l0-21swapper/519:09:535
111391580,6ptp4l0-21swapper/419:08:044
273642570,0sleep50-21swapper/522:04:535
2874425534,7sleep70-21swapper/719:07:317
2861225533,6sleep60-21swapper/619:05:456
2885825141,6sleep20-21swapper/219:08:542
2861824635,7sleep30-21swapper/319:05:503
37312440,0sleep40-21swapper/400:33:294
111391360,0ptp4l0-21swapper/023:30:570
111391310,0ptp4l0-21swapper/120:05:121
111391300,4ptp4l0-21swapper/021:42:380
111391300,0ptp4l0-21swapper/422:31:254
111391300,0ptp4l0-21swapper/000:12:270
111391290,0ptp4l0-21swapper/522:21:345
111391290,0ptp4l0-21swapper/423:02:084
111391290,0ptp4l0-21swapper/423:02:084
111391290,0ptp4l0-21swapper/422:38:454
111391290,0ptp4l0-21swapper/400:04:554
111391290,0ptp4l0-21swapper/122:36:391
111391290,0ptp4l0-21swapper/121:26:371
111391290,0ptp4l0-21swapper/119:35:211
111391290,0ptp4l0-21swapper/000:34:000
111391280,3ptp4l0-21swapper/720:45:187
111391280,0ptp4l0-21swapper/600:24:016
111391280,0ptp4l0-21swapper/521:54:475
111391280,0ptp4l0-21swapper/519:10:145
111391280,0ptp4l0-21swapper/423:47:384
111391280,0ptp4l0-21swapper/419:20:194
111391280,0ptp4l0-21swapper/121:54:091
111391280,0ptp4l0-21swapper/100:38:471
111391280,0ptp4l0-21swapper/022:32:380
111391280,0ptp4l0-21swapper/000:27:310
111391270,3ptp4l0-21swapper/023:39:560
111391270,0ptp4l0-21swapper/523:10:555
111391270,0ptp4l0-21swapper/521:19:435
111391270,0ptp4l0-21swapper/422:54:554
111391270,0ptp4l0-21swapper/221:16:032
111391270,0ptp4l0-21swapper/123:27:171
111391270,0ptp4l0-21swapper/123:11:401
111391270,0ptp4l0-21swapper/122:21:031
111391270,0ptp4l0-21swapper/121:23:521
111391270,0ptp4l0-21swapper/023:56:480
111391270,0ptp4l0-21swapper/022:56:180
111391270,0ptp4l0-21swapper/022:54:460
111391270,0ptp4l0-21swapper/022:07:280
111391270,0ptp4l0-21swapper/000:22:570
111391260,3ptp4l721ktimersoftd/700:20:397
111391260,1ptp4l785-21ssh21:26:000
111391260,0ptp4l0-21swapper/622:51:436
111391260,0ptp4l0-21swapper/523:15:535
111391260,0ptp4l0-21swapper/522:48:335
111391260,0ptp4l0-21swapper/500:38:045
111391260,0ptp4l0-21swapper/423:12:204
111391260,0ptp4l0-21swapper/422:57:204
111391260,0ptp4l0-21swapper/322:04:323
111391260,0ptp4l0-21swapper/123:24:561
111391260,0ptp4l0-21swapper/122:17:061
111391260,0ptp4l0-21swapper/121:19:261
111391260,0ptp4l0-21swapper/023:13:110
111391260,0ptp4l0-21swapper/022:25:540
111391260,0ptp4l0-21swapper/022:19:150
111391260,0ptp4l0-21swapper/022:10:200
111391260,0ptp4l0-21swapper/021:50:200
111391260,0ptp4l0-21swapper/021:49:380
111391260,0ptp4l0-21swapper/021:19:190
111391260,0ptp4l0-21swapper/020:20:010
111391260,0ptp4l0-21swapper/000:15:570
111391250,0ptp4l0-21swapper/721:44:597
111391250,0ptp4l0-21swapper/523:53:555
111391250,0ptp4l0-21swapper/520:30:155
111391250,0ptp4l0-21swapper/520:30:155
111391250,0ptp4l0-21swapper/519:45:005
111391250,0ptp4l0-21swapper/423:43:534
111391250,0ptp4l0-21swapper/423:16:074
111391250,0ptp4l0-21swapper/421:36:474
111391250,0ptp4l0-21swapper/221:28:272
111391250,0ptp4l0-21swapper/119:10:201
111391250,0ptp4l0-21swapper/023:47:510
111391250,0ptp4l0-21swapper/023:08:120
111391250,0ptp4l0-21swapper/022:22:490
111391250,0ptp4l0-21swapper/021:55:560
111391250,0ptp4l0-21swapper/021:31:420
111391250,0ptp4l0-21swapper/020:45:010
111391240,1ptp4l31353-21irqstats23:40:160
111391240,1ptp4l21792-21cat20:00:190
111391240,1ptp4l19470-21switchtime19:55:215
111391240,1ptp4l11421-21/usr/sbin/munin19:40:164
111391240,1ptp4l10896-21date20:50:000
111391240,1ptp4l0-21swapper/000:00:530
111391240,0ptp4l0-21swapper/722:04:017
111391240,0ptp4l0-21swapper/523:25:115
111391240,0ptp4l0-21swapper/523:01:305
111391240,0ptp4l0-21swapper/523:01:305
111391240,0ptp4l0-21swapper/522:15:145
111391240,0ptp4l0-21swapper/521:59:305
111391240,0ptp4l0-21swapper/520:59:515
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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