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2026-05-14 - 00:34

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 May 13, 2026 12:46:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1881916432,13phc2sys0-21swapper/107:08:431
111391630,5ptp4l0-21swapper/407:07:474
2437525948,6sleep70-21swapper/707:06:347
111391590,5ptp4l0-21swapper/007:07:420
288632570,0sleep70-21swapper/711:36:277
2450725342,7sleep20-21swapper/207:08:132
2274024837,6sleep60-21swapper/607:05:056
2431524736,7sleep30-21swapper/307:05:423
111391470,3ptp4l23385-21/usr/sbin/munin07:05:165
111391330,0ptp4l0-21swapper/010:14:560
111391330,0ptp4l0-21swapper/010:01:380
111391320,0ptp4l0-21swapper/009:45:350
111391310,1ptp4l2491499cyclictest11:22:000
111391310,0ptp4l0-21swapper/411:14:074
111391310,0ptp4l0-21swapper/011:55:160
111391300,0ptp4l0-21swapper/611:40:516
111391300,0ptp4l0-21swapper/509:44:595
111391300,0ptp4l0-21swapper/110:36:001
111391300,0ptp4l0-21swapper/110:35:591
111391300,0ptp4l0-21swapper/110:25:151
111391290,3ptp4l0-21swapper/107:30:181
111391290,0ptp4l0-21swapper/509:13:355
111391290,0ptp4l0-21swapper/409:27:254
111391290,0ptp4l0-21swapper/309:20:203
111391290,0ptp4l0-21swapper/112:31:591
111391290,0ptp4l0-21swapper/111:25:411
111391290,0ptp4l0-21swapper/109:40:161
111391290,0ptp4l0-21swapper/109:14:591
111391290,0ptp4l0-21swapper/010:36:350
111391290,0ptp4l0-21swapper/010:36:350
111391280,0ptp4l0-21swapper/412:30:354
111391280,0ptp4l0-21swapper/410:44:074
111391280,0ptp4l0-21swapper/410:04:224
111391280,0ptp4l0-21swapper/409:43:124
111391280,0ptp4l0-21swapper/110:05:391
111391280,0ptp4l0-21swapper/009:53:560
111391280,0ptp4l0-21swapper/009:18:290
111391270,0ptp4l0-21swapper/510:29:365
111391270,0ptp4l0-21swapper/510:01:115
111391270,0ptp4l0-21swapper/507:10:215
111391270,0ptp4l0-21swapper/412:08:374
111391270,0ptp4l0-21swapper/411:20:384
111391270,0ptp4l0-21swapper/411:18:574
111391270,0ptp4l0-21swapper/410:46:174
111391270,0ptp4l0-21swapper/410:33:164
111391270,0ptp4l0-21swapper/012:36:070
111391270,0ptp4l0-21swapper/011:37:080
111391270,0ptp4l0-21swapper/009:42:350
111391260,0ptp4l0-21swapper/511:30:125
111391260,0ptp4l0-21swapper/412:02:214
111391260,0ptp4l0-21swapper/411:45:124
111391260,0ptp4l0-21swapper/411:29:064
111391260,0ptp4l0-21swapper/410:05:114
111391260,0ptp4l0-21swapper/012:29:330
111391260,0ptp4l0-21swapper/011:02:330
111391250,1ptp4l12225-21irqrtprio07:50:164
111391250,0ptp4l0-21swapper/512:39:115
111391250,0ptp4l0-21swapper/511:04:525
111391250,0ptp4l0-21swapper/408:40:194
111391250,0ptp4l0-21swapper/112:15:121
111391250,0ptp4l0-21swapper/111:51:011
111391250,0ptp4l0-21swapper/111:32:541
111391250,0ptp4l0-21swapper/109:56:501
111391250,0ptp4l0-21swapper/109:30:341
111391250,0ptp4l0-21swapper/107:55:201
111391250,0ptp4l0-21swapper/107:35:161
111391250,0ptp4l0-21swapper/008:00:150
111391250,0ptp4l0-21swapper/008:00:150
111391250,0ptp4l0-21swapper/007:25:000
111391240,4ptp4l0-21swapper/212:03:042
111391240,3ptp4l0-21swapper/111:07:401
111391240,1ptp4l6371-21sed11:50:144
111391240,1ptp4l1526-21sed07:25:195
111391240,0ptp4l0-21swapper/707:45:187
111391240,0ptp4l0-21swapper/512:25:155
111391240,0ptp4l0-21swapper/511:11:595
111391240,0ptp4l0-21swapper/509:45:115
111391240,0ptp4l0-21swapper/509:36:175
111391240,0ptp4l0-21swapper/507:30:195
111391240,0ptp4l0-21swapper/411:40:134
111391240,0ptp4l0-21swapper/411:01:044
111391240,0ptp4l0-21swapper/410:21:464
111391240,0ptp4l0-21swapper/409:47:294
111391240,0ptp4l0-21swapper/409:35:134
111391240,0ptp4l0-21swapper/409:30:154
111391240,0ptp4l0-21swapper/409:16:524
111391240,0ptp4l0-21swapper/408:30:114
111391240,0ptp4l0-21swapper/407:15:134
111391240,0ptp4l0-21swapper/309:29:163
111391240,0ptp4l0-21swapper/307:45:023
111391240,0ptp4l0-21swapper/110:54:201
111391240,0ptp4l0-21swapper/110:47:431
111391240,0ptp4l0-21swapper/110:41:171
111391240,0ptp4l0-21swapper/110:19:261
111391240,0ptp4l0-21swapper/110:00:191
111391240,0ptp4l0-21swapper/109:46:551
111391240,0ptp4l0-21swapper/107:10:191
111391240,0ptp4l0-21swapper/012:15:540
111391240,0ptp4l0-21swapper/012:13:030
111391240,0ptp4l0-21swapper/011:49:340
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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