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2026-05-14 - 22:11

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 May 14, 2026 12:46:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
111391630,5ptp4l0-21swapper/107:07:141
111391620,31ptp4l0-21swapper/007:08:200
352326050,6sleep20-21swapper/207:05:072
522225533,7sleep50-21swapper/507:07:275
514225443,7sleep70-21swapper/707:06:247
43382540,0sleep30-21swapper/310:45:193
352525343,6sleep40-21swapper/407:05:084
535124938,6sleep60-21swapper/607:09:046
133412490,0sleep50-21swapper/508:35:125
133412490,0sleep50-21swapper/508:35:115
530224736,7sleep30-21swapper/307:08:293
111391310,6ptp4l0-21swapper/509:45:435
111391310,0ptp4l0-21swapper/410:59:344
111391310,0ptp4l0-21swapper/010:03:140
111391300,0ptp4l0-21swapper/507:10:135
111391300,0ptp4l0-21swapper/411:36:524
111391300,0ptp4l0-21swapper/411:07:064
111391300,0ptp4l0-21swapper/409:25:564
111391300,0ptp4l0-21swapper/011:30:110
111391300,0ptp4l0-21swapper/010:37:280
111391300,0ptp4l0-21swapper/009:58:370
111391300,0ptp4l0-21swapper/008:26:430
111391290,0ptp4l0-21swapper/511:56:295
111391290,0ptp4l0-21swapper/510:25:555
111391290,0ptp4l0-21swapper/508:25:125
111391290,0ptp4l0-21swapper/507:20:135
111391290,0ptp4l0-21swapper/412:01:504
111391290,0ptp4l0-21swapper/411:48:084
111391290,0ptp4l0-21swapper/010:49:080
111391290,0ptp4l0-21swapper/009:32:220
111391280,0ptp4l27208-21ssh11:16:171
111391280,0ptp4l0-21swapper/412:36:004
111391280,0ptp4l0-21swapper/412:05:374
111391280,0ptp4l0-21swapper/411:53:584
111391280,0ptp4l0-21swapper/410:20:154
111391280,0ptp4l0-21swapper/409:38:534
111391280,0ptp4l0-21swapper/110:20:451
111391280,0ptp4l0-21swapper/009:42:440
111391280,0ptp4l0-21swapper/009:20:140
111391270,0ptp4l0-21swapper/510:50:095
111391270,0ptp4l0-21swapper/412:20:194
111391270,0ptp4l0-21swapper/411:25:154
111391270,0ptp4l0-21swapper/411:10:174
111391270,0ptp4l0-21swapper/410:15:364
111391270,0ptp4l0-21swapper/410:07:364
111391270,0ptp4l0-21swapper/409:17:514
111391270,0ptp4l0-21swapper/112:08:291
111391270,0ptp4l0-21swapper/011:38:010
111391270,0ptp4l0-21swapper/010:56:260
111391270,0ptp4l0-21swapper/010:33:070
111391270,0ptp4l0-21swapper/010:17:050
111391270,0ptp4l0-21swapper/009:54:480
111391270,0ptp4l0-21swapper/008:40:210
111391270,0ptp4l0-21swapper/008:40:200
111391260,0ptp4l0-21swapper/511:19:085
111391260,0ptp4l0-21swapper/510:04:555
111391260,0ptp4l0-21swapper/410:38:514
111391260,0ptp4l0-21swapper/410:04:044
111391260,0ptp4l0-21swapper/409:30:534
111391260,0ptp4l0-21swapper/012:32:080
111391260,0ptp4l0-21swapper/012:28:500
111391260,0ptp4l0-21swapper/012:16:380
111391260,0ptp4l0-21swapper/012:10:330
111391260,0ptp4l0-21swapper/012:04:550
111391260,0ptp4l0-21swapper/010:54:490
111391260,0ptp4l0-21swapper/010:42:230
111391260,0ptp4l0-21swapper/010:14:110
111391260,0ptp4l0-21swapper/009:45:190
111391260,0ptp4l0-21swapper/009:26:310
111391260,0ptp4l0-21swapper/009:05:140
111391260,0ptp4l0-21swapper/008:55:210
111391260,0ptp4l0-21swapper/007:25:140
111391250,2ptp4l0-21swapper/512:26:525
111391250,1ptp4l8945-21hddtemp_smartct12:20:130
111391250,1ptp4l19237-21users08:45:194
111391250,1ptp4l14746-21munin-plugin-st11:45:010
111391250,0ptp4l0-21swapper/512:34:015
111391250,0ptp4l0-21swapper/510:07:535
111391250,0ptp4l0-21swapper/509:00:145
111391250,0ptp4l0-21swapper/509:00:005
111391250,0ptp4l0-21swapper/412:31:524
111391250,0ptp4l0-21swapper/411:30:444
111391250,0ptp4l0-21swapper/407:30:114
111391250,0ptp4l0-21swapper/211:55:212
111391250,0ptp4l0-21swapper/112:11:121
111391250,0ptp4l0-21swapper/110:57:401
111391250,0ptp4l0-21swapper/107:55:161
111391250,0ptp4l0-21swapper/012:35:130
111391250,0ptp4l0-21swapper/011:57:250
111391250,0ptp4l0-21swapper/011:24:280
111391250,0ptp4l0-21swapper/011:24:280
111391250,0ptp4l0-21swapper/011:10:540
111391250,0ptp4l0-21swapper/009:15:140
111391250,0ptp4l0-21swapper/008:15:140
111391250,0ptp4l0-21swapper/008:10:150
111391250,0ptp4l0-21swapper/008:00:130
111391240,1ptp4l9429-21irqstats07:15:150
111391240,1ptp4l8593-21memory11:35:155
111391240,1ptp4l7896-21latency_hist09:25:014
111391240,1ptp4l25-21ksoftirqd/109:20:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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