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2026-07-10 - 00:22

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 Jul 09, 2026 12:46:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
111391770,34ptp4l0-21swapper/307:07:393
111391640,5ptp4l0-21swapper/707:09:437
111391640,30ptp4l0-21swapper/107:06:281
111391600,5ptp4l0-21swapper/007:05:200
2175225937,7sleep20-21swapper/207:08:132
111391590,5ptp4l0-21swapper/407:06:114
264422580,1sleep557-21ksoftirqd/512:10:135
66422570,0sleep40-21swapper/411:04:114
280012550,0sleep10-21swapper/109:27:311
111391500,5ptp4l0-21swapper/507:07:195
2156524737,6sleep60-21swapper/607:05:446
111391370,0ptp4l0-21swapper/010:10:530
111391320,1ptp4l29530-21diskmemload09:30:070
111391320,0ptp4l0-21swapper/408:15:164
111391320,0ptp4l0-21swapper/009:55:000
111391310,4ptp4l0-21swapper/511:55:135
111391310,4ptp4l0-21swapper/509:50:325
111391310,0ptp4l20749-21ssh09:19:014
111391310,0ptp4l12933-21diskmemload10:48:380
111391310,0ptp4l0-21swapper/409:48:044
111391310,0ptp4l0-21swapper/109:18:371
111391310,0ptp4l0-21swapper/010:55:110
111391300,0ptp4l0-21swapper/710:10:007
111391300,0ptp4l0-21swapper/710:08:447
111391300,0ptp4l0-21swapper/509:49:315
111391300,0ptp4l0-21swapper/412:33:304
111391300,0ptp4l0-21swapper/411:53:384
111391300,0ptp4l0-21swapper/408:10:104
111391300,0ptp4l0-21swapper/110:57:141
111391300,0ptp4l0-21swapper/011:03:010
111391300,0ptp4l0-21swapper/010:15:200
111391290,2ptp4l0-21swapper/012:06:560
111391290,0ptp4l0-21swapper/511:01:295
111391290,0ptp4l0-21swapper/412:13:514
111391290,0ptp4l0-21swapper/410:58:314
111391290,0ptp4l0-21swapper/410:10:054
111391290,0ptp4l0-21swapper/409:30:164
111391290,0ptp4l0-21swapper/012:37:370
111391290,0ptp4l0-21swapper/012:20:390
111391290,0ptp4l0-21swapper/012:13:540
111391290,0ptp4l0-21swapper/011:26:070
111391290,0ptp4l0-21swapper/011:08:080
111391290,0ptp4l0-21swapper/011:08:080
111391290,0ptp4l0-21swapper/010:03:400
111391290,0ptp4l0-21swapper/009:42:460
111391290,0ptp4l0-21swapper/007:40:150
22206992825,2cyclictest17870-21turbostat12:00:003
111391280,2ptp4l0-21swapper/410:47:174
111391280,1ptp4l7777-21sed08:55:184
111391280,0ptp4l0-21swapper/512:31:315
111391280,0ptp4l0-21swapper/511:32:335
111391280,0ptp4l0-21swapper/509:31:265
111391280,0ptp4l0-21swapper/411:05:474
111391280,0ptp4l0-21swapper/411:05:474
111391280,0ptp4l0-21swapper/409:58:014
111391280,0ptp4l0-21swapper/409:38:154
111391280,0ptp4l0-21swapper/409:24:224
111391280,0ptp4l0-21swapper/109:45:221
111391280,0ptp4l0-21swapper/109:23:131
111391280,0ptp4l0-21swapper/012:02:480
111391270,3ptp4l0-21swapper/011:14:510
111391270,3ptp4l0-21swapper/011:14:510
111391270,2ptp4l0-21swapper/511:17:585
111391270,0ptp4l0-21swapper/712:34:557
111391270,0ptp4l0-21swapper/512:29:415
111391270,0ptp4l0-21swapper/511:29:535
111391270,0ptp4l0-21swapper/412:39:514
111391270,0ptp4l0-21swapper/412:27:254
111391270,0ptp4l0-21swapper/411:32:104
111391270,0ptp4l0-21swapper/411:28:514
111391270,0ptp4l0-21swapper/410:15:214
111391270,0ptp4l0-21swapper/011:47:400
111391270,0ptp4l0-21swapper/011:19:460
111391270,0ptp4l0-21swapper/010:31:090
111391270,0ptp4l0-21swapper/010:25:290
111391270,0ptp4l0-21swapper/009:46:180
111391260,2ptp4l0-21swapper/412:07:034
111391260,0ptp4l0-21swapper/611:10:596
111391260,0ptp4l0-21swapper/611:10:586
111391260,0ptp4l0-21swapper/512:17:595
111391260,0ptp4l0-21swapper/511:20:315
111391260,0ptp4l0-21swapper/412:19:444
111391260,0ptp4l0-21swapper/410:40:424
111391260,0ptp4l0-21swapper/410:38:494
111391260,0ptp4l0-21swapper/410:32:054
111391260,0ptp4l0-21swapper/410:26:384
111391260,0ptp4l0-21swapper/410:03:114
111391260,0ptp4l0-21swapper/407:45:154
111391260,0ptp4l0-21swapper/110:30:151
111391260,0ptp4l0-21swapper/109:44:481
111391260,0ptp4l0-21swapper/109:35:191
111391260,0ptp4l0-21swapper/011:56:180
111391260,0ptp4l0-21swapper/009:27:220
111391250,2ptp4l0-21swapper/011:44:020
111391250,1ptp4l21354-21smartctl10:40:180
111391250,1ptp4l17176-21latency_hist09:15:000
111391250,0ptp4l0-21swapper/510:25:505
111391250,0ptp4l0-21swapper/509:42:135
111391250,0ptp4l0-21swapper/508:35:115
111391250,0ptp4l0-21swapper/508:35:115
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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