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2026-04-14 - 21:34

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #8, slot #4

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 rack8slot4s.osadl.org (updated Tue Apr 14, 2026 12:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
483482229176,17sleep60-21swapper/607:08:136
460362219167,17sleep10-21swapper/107:05:101
484612213183,19sleep50-21swapper/507:09:505
482152213185,18sleep30-21swapper/307:06:173
484112211177,21sleep40-21swapper/407:09:084
481902211178,21sleep70-21swapper/707:05:577
484052206179,17sleep00-21swapper/007:09:030
460262201168,21sleep20-21swapper/207:05:032
4888299280,27cyclictest0-21swapper/209:55:002
4890199264,4cyclictest0-21swapper/708:53:437
4890199264,4cyclictest0-21swapper/708:09:477
4890199253,4cyclictest0-21swapper/711:38:297
4890199253,4cyclictest0-21swapper/709:37:407
4890199253,4cyclictest0-21swapper/709:37:397
4889799250,25cyclictest215796-21idleruntime-cro11:59:596
48882992521,3cyclictest230125-21basename12:25:002
4887999250,24cyclictest221533-21munin-run12:09:591
4887999250,24cyclictest0-21swapper/108:20:131
4890199240,23cyclictest81028-21munin-run08:05:007
4890199240,22cyclictest0-21swapper/708:40:137
48895992423,0cyclictest0-21swapper/509:25:135
48895992422,1cyclictest0-21swapper/511:20:155
4888299240,24cyclictest235830-21awk12:34:592
4887999240,3cyclictest201549-21awk11:35:001
4887999240,23cyclictest198683-21munin-run11:30:001
48877992420,3cyclictest363-21systemd-journal08:00:000
4887799240,23cyclictest0-21swapper/007:35:130
4890199230,22cyclictest238666-21awk12:39:597
4889799230,22cyclictest193402-21apt-get11:20:146
4889599230,22cyclictest187252-21munin-run11:10:005
4889599230,22cyclictest0-21swapper/509:50:115
48890992322,0cyclictest0-21swapper/410:05:114
4889099230,22cyclictest98162-21apt-get08:35:014
4888899230,2cyclictest155976-21apt-get10:15:123
4888899230,22cyclictest204412-21idleruntime-cro11:39:593
4888899230,22cyclictest0-21swapper/310:55:133
4888899230,22cyclictest0-21swapper/308:40:003
48882992322,1cyclictest98162-21apt-get08:35:002
4888299230,2cyclictest187257-21perf11:10:012
4888299230,22cyclictest124577-21apt-get09:20:122
4888299230,22cyclictest0-21swapper/212:05:132
4888299230,1cyclictest101726-21apt-get08:40:122
48877992322,0cyclictest0-21swapper/011:20:140
48877992321,1cyclictest72870-21apt-get07:50:130
4887799230,22cyclictest0-21swapper/011:10:010
4887799230,22cyclictest0-21swapper/010:40:140
4887799230,22cyclictest0-21swapper/010:35:000
48901992221,1cyclictest224804-21apt-get12:15:127
48901992221,1cyclictest0-21swapper/708:35:007
4890199220,21cyclictest0-21swapper/708:35:137
4890199220,21cyclictest0-21swapper/707:10:117
48897992221,1cyclictest170543-21apt-get10:40:146
4889799220,22cyclictest92885-21apt-get08:25:106
4889799220,22cyclictest0-21swapper/611:10:006
4889799220,21cyclictest0-21swapper/611:40:156
4889799220,21cyclictest0-21swapper/611:00:126
4889799220,21cyclictest0-21swapper/610:45:136
4889799220,21cyclictest0-21swapper/610:00:136
4889799220,21cyclictest0-21swapper/609:35:006
4889799220,1cyclictest89635-21sendmail-msp08:20:006
48895992222,0cyclictest0-21swapper/509:15:135
48895992221,1cyclictest0-21swapper/508:40:125
48895992220,1cyclictest95740-21apt-get08:30:135
48895992220,1cyclictest0-21swapper/512:05:135
48895992219,3cyclictest101311-21basename08:40:005
4889599220,22cyclictest0-21swapper/510:35:005
4889599220,21cyclictest0-21swapper/512:29:595
4889599220,21cyclictest0-21swapper/507:10:005
4889599220,1cyclictest109858-21munin-run08:55:015
4889599220,1cyclictest0-21swapper/507:40:125
48890992222,0cyclictest0-21swapper/411:40:144
4889099220,21cyclictest0-21swapper/412:35:144
4889099220,21cyclictest0-21swapper/411:25:144
4889099220,21cyclictest0-21swapper/410:20:104
4889099220,21cyclictest0-21swapper/409:20:134
48888992221,1cyclictest0-21swapper/307:55:003
4888899220,21cyclictest0-21swapper/311:40:143
4888899220,21cyclictest0-21swapper/311:05:113
4888899220,21cyclictest0-21swapper/311:00:123
4888899220,21cyclictest0-21swapper/310:50:113
48882992221,1cyclictest158849-21apt-get10:20:102
4888299220,21cyclictest0-21swapper/212:15:122
4888299220,21cyclictest0-21swapper/211:03:282
4888299220,21cyclictest0-21swapper/209:00:122
4888299220,21cyclictest0-21swapper/208:50:132
4888299220,21cyclictest0-21swapper/207:25:122
4888299220,1cyclictest238671-21perf12:39:592
4888299220,0cyclictest0-21swapper/209:45:142
48879992221,1cyclictest0-21swapper/111:35:151
48879992221,0cyclictest0-21swapper/110:20:101
4887999220,21cyclictest928882sleep108:25:101
4887999220,21cyclictest0-21swapper/111:55:121
4887999220,21cyclictest0-21swapper/108:05:111
4887999220,0cyclictest0-21swapper/108:55:131
4887999220,0cyclictest0-21swapper/108:45:121
48877992221,1cyclictest144552-21apt-get09:55:120
48877992221,1cyclictest0-21swapper/011:03:270
48877992220,1cyclictest219103-21apt-get12:05:140
48877992220,1cyclictest0-21swapper/007:30:120
4887799220,1cyclictest0-21swapper/012:35:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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