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2026-06-18 - 17:15

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 Jun 18, 2026 12:46:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1186926535,6sleep70-21swapper/707:09:277
318692640,1sleep125-21ksoftirqd/111:16:401
46872630,0sleep50-21swapper/509:10:185
111391620,31ptp4l0-21swapper/107:08:491
111391600,29ptp4l0-21swapper/007:08:230
1174725949,6sleep20-21swapper/207:07:542
111391590,5ptp4l0-21swapper/507:07:585
200532580,1sleep720050-21grep07:25:127
303522570,1sleep3391rcuc/311:15:133
294132570,0sleep30-21swapper/309:45:093
1184025645,6sleep40-21swapper/407:09:094
1187925533,7sleep60-21swapper/607:09:346
1160225334,7sleep30-21swapper/307:06:033
111391340,0ptp4l0-21swapper/507:50:175
111391310,2ptp4l0-21swapper/411:40:164
111391300,1ptp4l28108-21ssh09:43:025
111391300,1ptp4l18564-21latency_hist11:00:000
111391300,1ptp4l1217699cyclictest10:34:360
111391300,0ptp4l0-21swapper/512:22:545
111391290,0ptp4l0-21swapper/412:09:394
111391290,0ptp4l0-21swapper/410:11:344
111391290,0ptp4l0-21swapper/109:59:351
111391290,0ptp4l0-21swapper/107:10:091
111391290,0ptp4l0-21swapper/010:51:050
111391280,0ptp4l0-21swapper/607:20:126
111391280,0ptp4l0-21swapper/607:20:116
111391280,0ptp4l0-21swapper/409:50:214
111391280,0ptp4l0-21swapper/112:25:241
111391280,0ptp4l0-21swapper/112:24:591
111391280,0ptp4l0-21swapper/012:04:470
111391280,0ptp4l0-21swapper/011:02:440
111391280,0ptp4l0-21swapper/009:27:170
111391280,0ptp4l0-21swapper/009:23:380
111391270,2ptp4l0-21swapper/010:45:190
111391270,1ptp4l0-21swapper/407:55:184
111391270,0ptp4l0-21swapper/712:39:377
111391270,0ptp4l0-21swapper/712:39:367
111391270,0ptp4l0-21swapper/411:35:194
111391270,0ptp4l0-21swapper/411:20:334
111391270,0ptp4l0-21swapper/411:07:204
111391270,0ptp4l0-21swapper/409:21:444
111391270,0ptp4l0-21swapper/208:55:122
111391270,0ptp4l0-21swapper/111:45:441
111391270,0ptp4l0-21swapper/012:30:400
111391270,0ptp4l0-21swapper/010:35:220
111391270,0ptp4l0-21swapper/010:21:560
111391270,0ptp4l0-21swapper/009:39:480
111391270,0ptp4l0-21swapper/009:05:130
111391260,0ptp4l0-21swapper/709:12:397
111391260,0ptp4l0-21swapper/511:50:165
111391260,0ptp4l0-21swapper/511:22:445
111391260,0ptp4l0-21swapper/510:35:435
111391260,0ptp4l0-21swapper/509:57:175
111391260,0ptp4l0-21swapper/509:30:305
111391260,0ptp4l0-21swapper/411:30:134
111391260,0ptp4l0-21swapper/411:02:314
111391260,0ptp4l0-21swapper/410:47:504
111391260,0ptp4l0-21swapper/409:45:244
111391260,0ptp4l0-21swapper/409:43:074
111391260,0ptp4l0-21swapper/409:13:564
111391260,0ptp4l0-21swapper/308:25:003
111391260,0ptp4l0-21swapper/110:23:141
111391260,0ptp4l0-21swapper/012:20:120
111391260,0ptp4l0-21swapper/011:22:230
111391260,0ptp4l0-21swapper/011:11:230
111391260,0ptp4l0-21swapper/009:43:550
111391260,0ptp4l0-21swapper/009:30:360
111391250,1ptp4l6356-21ssh09:57:060
111391250,1ptp4l14454-21munin-node07:15:005
111391250,0ptp4l0-21swapper/512:36:375
111391250,0ptp4l0-21swapper/512:36:365
111391250,0ptp4l0-21swapper/512:12:415
111391250,0ptp4l0-21swapper/412:16:134
111391250,0ptp4l0-21swapper/411:13:114
111391250,0ptp4l0-21swapper/410:50:574
111391250,0ptp4l0-21swapper/410:07:194
111391250,0ptp4l0-21swapper/409:32:564
111391250,0ptp4l0-21swapper/409:15:064
111391250,0ptp4l0-21swapper/408:40:154
111391250,0ptp4l0-21swapper/011:58:470
111391250,0ptp4l0-21swapper/011:33:160
111391250,0ptp4l0-21swapper/009:45:360
111391250,0ptp4l0-21swapper/009:19:580
111391250,0ptp4l0-21swapper/009:11:490
111391240,3ptp4l18886-21kworker/1:012:38:541
111391240,3ptp4l18886-21kworker/1:012:38:541
111391240,2ptp4l321ktimersoftd/209:45:482
111391240,1ptp4l6378-21irqrtprio08:05:145
111391240,1ptp4l561ktimersoftd/510:40:595
111391240,1ptp4l30018-21/usr/sbin/munin10:30:134
111391240,1ptp4l27838-21smartctl07:40:194
111391240,1ptp4l26793-21smartctl08:50:115
111391240,1ptp4l20786-21cat08:35:181
111391240,1ptp4l20630-21grep07:25:174
111391240,1ptp4l18801-21timerandwakeup07:20:190
111391240,1ptp4l18801-21timerandwakeup07:20:180
111391240,1ptp4l17179-21unixbench_singl11:40:190
111391240,1ptp4l10063-21munin-run08:15:001
111391240,1ptp4l0-21swapper/111:55:101
111391240,0ptp4l0-21swapper/512:19:125
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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