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2026-04-08 - 21:45

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #6

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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Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot6s.osadl.org (updated Wed Apr 08, 2026 12:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
33523699772,45cyclictest1660-21snmpd10:30:001
335236997562,7cyclictest231ktimers/109:25:181
335235996858,4cyclictest0-21swapper/011:40:120
33523699613,27cyclictest24-21ksoftirqd/107:50:021
33523699613,27cyclictest24-21ksoftirqd/107:50:021
33523699601,35cyclictest0-21swapper/107:35:011
33523599581,4cyclictest0-21swapper/012:15:110
335239995652,2cyclictest0-21swapper/207:35:172
335236995643,8cyclictest372812-21grep10:45:281
335239995533,15cyclictest311ktimers/210:20:152
335236995543,8cyclictest348054-21unixbench_multi08:20:271
33523599551,52cyclictest0-21swapper/011:25:110
33523999548,28cyclictest30-21rcuc/211:30:012
33523999544,46cyclictest366167-21cmp10:10:002
33523999544,46cyclictest366167-21cmp10:10:002
335236995314,15cyclictest231ktimers/112:20:021
335239995229,19cyclictest311ktimers/210:00:132
335239995212,16cyclictest352371-21apt-get08:50:012
335235995137,11cyclictest0-21swapper/012:15:000
33523599511,7cyclictest0-21swapper/012:00:000
33523599511,48cyclictest0-21swapper/009:45:240
33523599511,2cyclictest0-21swapper/008:35:010
33523599511,14cyclictest0-21swapper/011:15:010
335236994933,10cyclictest0-21swapper/108:45:011
335236994918,4cyclictest363442-21apt-get09:55:011
335235994935,11cyclictest0-21swapper/010:10:010
335235994935,11cyclictest0-21swapper/010:10:010
335235994931,15cyclictest167350irq/118-8000000.ethernet-tx010:15:240
33523999487,23cyclictest372275-21/usr/sbin/munin10:45:172
33523699488,21cyclictest24-21ksoftirqd/110:05:011
33523699486,10cyclictest22-21rcuc/112:15:011
335236994837,8cyclictest231ktimers/112:20:011
335239994737,6cyclictest358328-21grep09:20:272
33523699479,24cyclictest22-21rcuc/109:20:011
335236994712,7cyclictest336204-21users07:15:021
335236994712,7cyclictest336204-21users07:15:011
335235994725,19cyclictest20650irq/252-8000000.ethernet08:10:170
335239994631,11cyclictest311ktimers/209:35:142
335239994625,16cyclictest311ktimers/208:35:112
335236994636,5cyclictest348996-21munin-plugin-st08:30:001
335235994636,6cyclictest335237-21cat07:10:000
335239994532,9cyclictest337175-21sendmail07:19:592
335239994526,12cyclictest311ktimers/208:15:142
335239994513,15cyclictest369738-21/usr/sbin/munin10:30:192
335235994537,4cyclictest167350irq/118-8000000.ethernet-tx007:10:280
335235994537,4cyclictest167350irq/118-8000000.ethernet-tx007:10:280
33523599453,6cyclictest364029-21meminfo09:55:230
33523599453,6cyclictest364029-21meminfo09:55:230
33523599453,6cyclictest358383-21munin-run09:25:010
335235994536,5cyclictest376286-21cron11:10:000
335235994536,5cyclictest0-21swapper/010:50:260
33523999441,37cyclictest0-21swapper/212:15:002
33523699449,20cyclictest335230-21cyclictest11:00:111
335236994431,8cyclictest0-21swapper/108:50:011
335236994427,12cyclictest0-21swapper/110:15:191
335235994438,3cyclictest167350irq/118-8000000.ethernet-tx011:35:140
335235994438,3cyclictest167350irq/118-8000000.ethernet-tx011:35:140
335235994437,4cyclictest167350irq/118-8000000.ethernet-tx008:40:220
335235994428,12cyclictest0-21swapper/008:50:270
33523599442,6cyclictest344437-21memory08:00:250
33523599442,39cyclictest377889-21unixbench_multi11:15:270
335239994333,6cyclictest341321-21grep07:40:292
335239994324,13cyclictest311ktimers/212:30:122
33523699433,9cyclictest0-21swapper/110:10:021
33523699433,9cyclictest0-21swapper/110:10:011
33523699433,4cyclictest0-21swapper/111:20:001
335236994334,6cyclictest231ktimers/110:10:201
335236994334,5cyclictest391760-21sendmail12:39:591
335236994334,5cyclictest391760-21sendmail12:39:591
335236994316,13cyclictest24-21ksoftirqd/107:35:161
335235994335,4cyclictest167350irq/118-8000000.ethernet-tx010:10:250
335239994229,9cyclictest0-21swapper/211:40:272
335236994232,5cyclictest350571-21grep08:35:291
335236994231,6cyclictest380422-21grep11:30:291
335236994227,9cyclictest0-21swapper/109:45:251
335236994212,14cyclictest0-21swapper/112:05:111
33523599424,7cyclictest0-21swapper/012:25:020
335235994235,4cyclictest20650irq/252-8000000.ethernet10:45:240
33523599421,38cyclictest0-21swapper/012:25:290
33523599421,38cyclictest0-21swapper/012:25:290
33523599421,38cyclictest0-21swapper/009:35:190
335239994132,5cyclictest377035-21grep11:10:282
335239994127,10cyclictest0-21swapper/207:10:252
335239994127,10cyclictest0-21swapper/207:10:252
335239994123,9cyclictest0-21swapper/208:30:202
335239994122,13cyclictest0-21swapper/211:18:222
335236994126,9cyclictest0-21swapper/109:55:291
335236994126,9cyclictest0-21swapper/109:55:291
33523699411,9cyclictest0-21swapper/108:55:001
335236994110,16cyclictest24-21ksoftirqd/111:25:011
33523599414,34cyclictest0-21swapper/010:00:180
335235994135,4cyclictest0-21swapper/009:40:210
335235994134,4cyclictest347313-21sendmail08:20:000
335235994134,3cyclictest391610-21mailstats12:35:270
335235994134,3cyclictest391610-21mailstats12:35:270
335235994133,4cyclictest0-21swapper/011:20:180
335235994125,9cyclictest0-21swapper/007:40:010
33523599411,9cyclictest0-21swapper/011:35:010
33523599411,4cyclictest348995-21munin-run08:30:000
33523599411,37cyclictest0-21swapper/009:05:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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