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2026-03-07 - 00:52

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 Fri Mar 06, 2026 12:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
33094562244184,48sleep30-21swapper/307:09:343
33070452231167,20sleep40-21swapper/407:05:094
33092882221187,22sleep50-21swapper/507:07:115
33092632212185,17sleep70-21swapper/707:06:497
33093482211178,21sleep00-21swapper/007:08:020
33091922211173,24sleep10-21swapper/107:05:461
33091772209176,21sleep60-21swapper/607:05:356
33092762205177,18sleep20-21swapper/207:07:002
330972899327,1cyclictest201rcu_preempt12:30:124
3309728992928,1cyclictest3419492-21sendmail-msp10:20:004
330973799250,2cyclictest3425439-21munin-run10:30:007
330972499250,24cyclictest3362023-21turbostat08:40:003
3309722992523,1cyclictest3396326-21idleruntime-cro09:40:002
330971999250,24cyclictest3396739-21apt-get09:40:121
330971999250,24cyclictest0-21swapper/110:25:001
3309737992422,2cyclictest3431587-21apt-get10:40:117
330973799240,23cyclictest3316071-21basename07:20:007
3309733992423,1cyclictest0-21swapper/612:00:126
3309728992424,0cyclictest0-21swapper/408:35:124
330972499240,22cyclictest0-21swapper/307:30:133
3309722992422,1cyclictest3319325-21apt-get07:25:112
3309722992421,2cyclictest3451915-21sh11:15:002
330973799239,14cyclictest0-21swapper/711:35:207
3309737992321,1cyclictest3413749-21munin-run10:10:007
3309737992321,1cyclictest0-21swapper/711:20:007
3309737992321,1cyclictest0-21swapper/711:00:127
330973799230,22cyclictest0-21swapper/707:20:167
330973799230,1cyclictest3431141-21apt10:40:007
3309733992321,2cyclictest3402031-21idleruntime-cro09:50:006
3309733992321,1cyclictest3344896-21awk08:10:006
330973399231,22cyclictest0-21swapper/612:20:006
330973399230,23cyclictest0-21swapper/610:55:006
330973399230,22cyclictest3402439-21apt-get09:50:116
3309730992321,1cyclictest69-21ksoftirqd/510:15:005
330972899230,23cyclictest3428240-21updatedb.plocat10:34:404
330972899230,22cyclictest0-21swapper/411:40:114
330972499230,22cyclictest3475199-21apt-get11:55:123
330972499230,22cyclictest0-21swapper/308:50:003
330972299230,22cyclictest3312674-21latency_hist07:15:012
3309719992321,1cyclictest3413738-21idleruntime-cro10:10:001
330971999230,22cyclictest3313599-21apt-get07:15:111
330971999230,1cyclictest3402439-21apt-get09:50:101
3309717992322,1cyclictest0-21swapper/010:05:000
3309717992321,1cyclictest3497887-21idleruntime-cro12:35:000
3309717992320,2cyclictest3483628-21awk12:10:000
330971799230,22cyclictest0-21swapper/009:35:110
3309737992221,1cyclictest0-21swapper/709:10:127
3309737992220,1cyclictest883-21mta-sts-daemon09:00:137
3309737992220,1cyclictest3339465-21packagekitd08:00:017
3309733992221,1cyclictest0-21swapper/607:40:116
3309733992221,1cyclictest0-21swapper/607:40:116
330973399220,22cyclictest0-21swapper/612:15:006
330973399220,21cyclictest3414167-21apt-get10:10:116
330973399220,21cyclictest0-21swapper/611:05:016
330973099224,18cyclictest0-21swapper/509:50:115
3309730992222,0cyclictest0-21swapper/510:03:475
3309730992221,1cyclictest0-21swapper/508:25:115
3309730992221,1cyclictest0-21swapper/507:15:125
3309730992220,1cyclictest671rcuc/508:05:115
3309730992219,2cyclictest3445955-21latency_hist11:05:005
330973099220,22cyclictest671rcuc/508:35:125
330973099220,22cyclictest3422325-21munin-run10:25:005
330973099220,22cyclictest0-21swapper/511:40:105
330973099220,1cyclictest0-21swapper/511:10:125
3309728992221,1cyclictest591ktimers/411:05:004
3309728992221,1cyclictest0-21swapper/407:20:004
330972899220,22cyclictest0-21swapper/410:03:474
330972899220,22cyclictest0-21swapper/408:55:004
330972899220,21cyclictest0-21swapper/411:10:124
330972899220,21cyclictest0-21swapper/410:40:114
3309724992221,1cyclictest0-21swapper/312:25:133
3309724992221,1cyclictest0-21swapper/309:25:013
330972499220,21cyclictest0-21swapper/312:00:133
330972499220,21cyclictest0-21swapper/310:03:473
330972499220,21cyclictest0-21swapper/309:35:113
330972499220,1cyclictest3411317-21apt-get10:05:123
330972499220,1cyclictest3368164-21apt-get08:50:113
3309722992219,2cyclictest3486484-21basename12:15:002
330972299220,21cyclictest3399588-21apt-get09:45:112
330972299220,21cyclictest0-21swapper/210:20:122
330972299220,21cyclictest0-21swapper/209:15:132
330972299220,1cyclictest3436863-21apt-get10:50:012
330972299220,1cyclictest3417016-21apt-get10:15:112
330972299220,1cyclictest3371015-21apt-get08:55:112
3309719992221,1cyclictest3336474-21apt-get07:55:111
3309719992220,1cyclictest3451933-21basename11:15:001
3309719992220,1cyclictest3434438-21apt-get10:45:111
3309719992220,1cyclictest0-21swapper/110:20:001
330971999220,22cyclictest0-21swapper/109:50:001
330971999220,21cyclictest3463358-21munin-run11:35:001
330971999220,21cyclictest3440659-21apt-get10:55:121
330971999220,21cyclictest0-21swapper/109:20:111
330971999220,21cyclictest0-21swapper/109:00:131
330971999220,21cyclictest0-21swapper/108:15:001
330971999220,21cyclictest0-21swapper/107:40:111
330971999220,21cyclictest0-21swapper/107:40:111
330971999220,21cyclictest0-21swapper/107:25:111
330971999220,1cyclictest0-21swapper/112:35:001
3309717992222,0cyclictest0-21swapper/009:45:110
3309717992221,1cyclictest3463774-21apt-get11:35:100
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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