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2026-06-24 - 18:21

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 Wed Jun 24, 2026 12:46:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
246972660,0sleep30-21swapper/309:50:163
111391650,0ptp4l17112-21sh10:25:134
267726332,16sleep40-21swapper/407:07:424
282126252,6sleep70-21swapper/707:09:307
227752620,1sleep4481ktimersoftd/412:01:314
111391620,29ptp4l0-21swapper/107:07:311
111391610,5ptp4l0-21swapper/007:07:120
255825342,7sleep20-21swapper/207:06:282
89924939,6sleep60-21swapper/607:05:056
268924736,7sleep30-21swapper/307:07:503
280124631,10sleep50-21swapper/507:09:115
111391400,0ptp4l0-21swapper/412:30:434
111391340,0ptp4l0-21swapper/409:16:344
111391340,0ptp4l0-21swapper/409:16:334
111391330,0ptp4l0-21swapper/409:30:184
111391320,0ptp4l0-21swapper/110:02:411
111391310,0ptp4l0-21swapper/410:03:214
111391310,0ptp4l0-21swapper/408:35:194
111391310,0ptp4l0-21swapper/011:46:410
111391300,2ptp4l0-21swapper/412:09:074
111391300,0ptp4l0-21swapper/512:10:115
111391300,0ptp4l0-21swapper/411:07:304
111391300,0ptp4l0-21swapper/410:49:294
111391300,0ptp4l0-21swapper/409:55:204
111391300,0ptp4l0-21swapper/409:11:254
111391300,0ptp4l0-21swapper/409:11:244
111391300,0ptp4l0-21swapper/110:52:491
111391300,0ptp4l0-21swapper/109:15:241
111391300,0ptp4l0-21swapper/109:15:231
111391300,0ptp4l0-21swapper/010:09:540
111391290,2ptp4l0-21swapper/409:46:054
111391290,0ptp4l26246-21diskmemload10:18:051
111391290,0ptp4l0-21swapper/411:42:154
111391290,0ptp4l0-21swapper/112:10:081
111391290,0ptp4l0-21swapper/111:35:211
111391290,0ptp4l0-21swapper/109:21:121
111391290,0ptp4l0-21swapper/109:12:551
111391290,0ptp4l0-21swapper/109:12:551
111391290,0ptp4l0-21swapper/010:11:170
111391280,0ptp4l0-21swapper/508:40:185
111391280,0ptp4l0-21swapper/411:18:314
111391280,0ptp4l0-21swapper/112:08:091
111391280,0ptp4l0-21swapper/012:31:320
111391280,0ptp4l0-21swapper/011:14:540
111391280,0ptp4l0-21swapper/009:56:430
111391280,0ptp4l0-21swapper/009:16:010
111391280,0ptp4l0-21swapper/009:16:010
111391280,0ptp4l0-21swapper/008:15:120
3152992722,2cyclictest30479-21turbostat10:00:013
111391270,2ptp4l0-21swapper/411:32:304
111391270,0ptp4l0-21swapper/709:59:177
111391270,0ptp4l0-21swapper/511:56:105
111391270,0ptp4l0-21swapper/109:41:391
111391270,0ptp4l0-21swapper/012:13:310
111391270,0ptp4l0-21swapper/012:04:070
111391270,0ptp4l0-21swapper/011:05:130
111391270,0ptp4l0-21swapper/011:03:310
111391270,0ptp4l0-21swapper/010:44:190
111391270,0ptp4l0-21swapper/010:38:330
111391270,0ptp4l0-21swapper/010:03:080
111391270,0ptp4l0-21swapper/009:35:500
111391260,0ptp4l0-21swapper/709:27:077
111391260,0ptp4l0-21swapper/412:36:184
111391260,0ptp4l0-21swapper/411:25:494
111391260,0ptp4l0-21swapper/411:13:394
111391260,0ptp4l0-21swapper/410:54:314
111391260,0ptp4l0-21swapper/309:14:493
111391260,0ptp4l0-21swapper/309:14:483
111391260,0ptp4l0-21swapper/112:25:021
111391260,0ptp4l0-21swapper/109:54:021
111391260,0ptp4l0-21swapper/009:20:140
111391250,0ptp4l0-21swapper/512:34:205
111391250,0ptp4l0-21swapper/510:25:195
111391250,0ptp4l0-21swapper/412:26:574
111391250,0ptp4l0-21swapper/411:50:104
111391250,0ptp4l0-21swapper/411:50:094
111391250,0ptp4l0-21swapper/410:05:174
111391250,0ptp4l0-21swapper/409:22:424
111391250,0ptp4l0-21swapper/212:00:222
111391250,0ptp4l0-21swapper/112:19:251
111391250,0ptp4l0-21swapper/110:42:461
111391250,0ptp4l0-21swapper/108:50:151
111391250,0ptp4l0-21swapper/012:38:020
111391250,0ptp4l0-21swapper/012:24:240
111391250,0ptp4l0-21swapper/012:19:530
111391250,0ptp4l0-21swapper/011:50:480
111391250,0ptp4l0-21swapper/011:50:470
111391250,0ptp4l0-21swapper/011:36:100
111391250,0ptp4l0-21swapper/011:27:450
111391250,0ptp4l0-21swapper/009:45:300
111391250,0ptp4l0-21swapper/009:40:420
111391250,0ptp4l0-21swapper/009:26:170
111391250,0ptp4l0-21swapper/008:52:580
111391250,0ptp4l0-21swapper/008:10:120
111391240,1ptp4l22910-21irqstats07:50:155
111391240,1ptp4l19944-21sed07:45:014
111391240,1ptp4l16803-21/usr/sbin/munin10:25:160
111391240,1ptp4l14695-21unixbench_singl10:20:200
111391240,1ptp4l11484-21latency07:25:140
111391240,0ptp4l25169-21strings11:20:174
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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