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2026-07-16 - 01:57

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 Jul 15, 2026 12:46:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2379021180,0sleep00-21swapper/012:05:210
8402680,0sleep00-21swapper/008:35:180
250232640,0sleep60-21swapper/610:45:016
111391630,29ptp4l0-21swapper/107:05:201
111391620,5ptp4l0-21swapper/007:05:070
309342590,0sleep50-21swapper/511:34:265
111391580,6ptp4l0-21swapper/507:05:425
2457925544,6sleep70-21swapper/707:09:567
1881915534,7phc2sys0-21swapper/407:09:464
2448625232,6sleep60-21swapper/607:08:436
2423925040,6sleep20-21swapper/207:05:342
262382490,0sleep40-21swapper/411:27:214
2426924737,6sleep30-21swapper/307:05:593
111391330,0ptp4l0-21swapper/408:55:154
111391330,0ptp4l0-21swapper/007:30:160
111391320,0ptp4l0-21swapper/410:00:224
111391310,0ptp4l0-21swapper/411:30:044
111391310,0ptp4l0-21swapper/411:00:204
111391310,0ptp4l0-21swapper/409:48:264
111391310,0ptp4l0-21swapper/012:14:310
111391310,0ptp4l0-21swapper/012:02:220
111391310,0ptp4l0-21swapper/009:30:110
111391300,0ptp4l0-21swapper/510:06:585
111391300,0ptp4l0-21swapper/411:37:554
111391300,0ptp4l0-21swapper/411:20:134
111391300,0ptp4l0-21swapper/409:15:124
111391300,0ptp4l0-21swapper/111:30:201
111391300,0ptp4l0-21swapper/008:55:130
111391290,0ptp4l0-21swapper/407:30:004
111391290,0ptp4l0-21swapper/108:50:191
111391290,0ptp4l0-21swapper/010:22:470
111391290,0ptp4l0-21swapper/010:03:070
111391290,0ptp4l0-21swapper/009:21:390
111391290,0ptp4l0-21swapper/008:10:200
111391280,0ptp4l0-21swapper/511:16:595
111391280,0ptp4l0-21swapper/412:36:234
111391280,0ptp4l0-21swapper/412:14:564
111391280,0ptp4l0-21swapper/411:40:144
111391280,0ptp4l0-21swapper/410:56:574
111391280,0ptp4l0-21swapper/211:52:092
111391280,0ptp4l0-21swapper/112:10:191
111391280,0ptp4l0-21swapper/111:58:031
111391280,0ptp4l0-21swapper/011:47:540
111391280,0ptp4l0-21swapper/011:37:350
111391280,0ptp4l0-21swapper/010:53:170
111391280,0ptp4l0-21swapper/010:15:480
111391280,0ptp4l0-21swapper/009:50:380
111391270,3ptp4l0-21swapper/310:40:513
111391270,3ptp4l0-21swapper/011:10:040
111391270,2ptp4l0-21swapper/410:43:214
111391270,0ptp4l0-21swapper/610:14:356
111391270,0ptp4l0-21swapper/509:19:495
111391270,0ptp4l0-21swapper/412:18:344
111391270,0ptp4l0-21swapper/410:52:414
111391270,0ptp4l0-21swapper/410:37:404
111391270,0ptp4l0-21swapper/410:26:544
111391270,0ptp4l0-21swapper/410:05:024
111391270,0ptp4l0-21swapper/111:06:421
111391270,0ptp4l0-21swapper/109:20:031
111391270,0ptp4l0-21swapper/109:10:211
111391270,0ptp4l0-21swapper/012:34:410
111391270,0ptp4l0-21swapper/012:34:400
111391270,0ptp4l0-21swapper/012:21:050
111391270,0ptp4l0-21swapper/011:59:100
111391270,0ptp4l0-21swapper/011:16:530
111391270,0ptp4l0-21swapper/010:58:060
111391270,0ptp4l0-21swapper/010:45:560
111391270,0ptp4l0-21swapper/010:28:310
111391270,0ptp4l0-21swapper/009:42:240
111391270,0ptp4l0-21swapper/009:12:500
111391260,1ptp4l25450-21ethtool07:10:135
111391260,0ptp4l0-21swapper/511:58:565
111391260,0ptp4l0-21swapper/511:52:335
111391260,0ptp4l0-21swapper/511:35:385
111391260,0ptp4l0-21swapper/511:13:365
111391260,0ptp4l0-21swapper/509:57:115
111391260,0ptp4l0-21swapper/509:57:105
111391260,0ptp4l0-21swapper/509:10:235
111391260,0ptp4l0-21swapper/508:56:395
111391260,0ptp4l0-21swapper/411:51:044
111391260,0ptp4l0-21swapper/411:13:154
111391260,0ptp4l0-21swapper/411:05:254
111391260,0ptp4l0-21swapper/111:17:181
111391260,0ptp4l0-21swapper/012:37:510
111391260,0ptp4l0-21swapper/011:32:140
111391260,0ptp4l0-21swapper/011:26:070
111391260,0ptp4l0-21swapper/010:42:400
111391260,0ptp4l0-21swapper/009:57:150
111391260,0ptp4l0-21swapper/009:57:140
111391260,0ptp4l0-21swapper/009:45:190
111391260,0ptp4l0-21swapper/008:15:180
111391250,2ptp4l481ktimersoftd/409:55:284
111391250,2ptp4l481ktimersoftd/409:55:284
111391250,1ptp4l31113-21swap08:30:170
111391250,1ptp4l2506-21fw_forwarded_lo08:40:134
111391250,1ptp4l15134-21unixbench_multi10:30:191
111391250,0ptp4l0-21swapper/710:41:327
111391250,0ptp4l0-21swapper/511:07:085
111391250,0ptp4l0-21swapper/511:01:395
111391250,0ptp4l0-21swapper/508:50:155
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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