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2026-09-28 - 03:03

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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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.

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 Sun Sep 27, 2026 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
107143999881,3cyclictest0-21swapper/109:25:011
107143699871,12cyclictest1078528-21kworker/u8:3+events_power_efficient07:55:010
107144299854,56cyclictest1095791-21apt-get09:30:013
107143699851,3cyclictest0-21swapper/009:25:010
107143999832,75cyclictest0-21swapper/107:55:011
1071440998124,14cyclictest311ktimers/207:20:012
107143999771,45cyclictest0-21swapper/112:00:011
1071439997613,15cyclictest1123232-21/usr/sbin/munin12:05:201
107143699761,3cyclictest15-21rcuc/011:48:410
107143699761,3cyclictest15-21rcuc/011:48:410
1071439997513,19cyclictest1101158-21/usr/sbin/munin10:00:191
1071439997513,19cyclictest1101158-21/usr/sbin/munin10:00:191
1071440997155,11cyclictest311ktimers/211:48:412
1071440997155,11cyclictest311ktimers/211:48:412
107144099679,28cyclictest1103768-21/usr/sbin/munin10:15:192
1071436996020,7cyclictest0-21swapper/008:00:010
1071440995950,5cyclictest1108649-21munin-plugin-st10:45:002
107143699581,24cyclictest15-21rcuc/008:00:020
1071436995551,2cyclictest0-21swapper/008:30:000
1071436995546,4cyclictest0-21swapper/011:25:110
1071440995331,14cyclictest311ktimers/211:30:142
107143999531,13cyclictest0-21swapper/107:35:011
107143999531,13cyclictest0-21swapper/107:35:011
1071440995243,6cyclictest1072242-21munin-plugin-st07:15:002
1071439995237,11cyclictest1100946-21munin-plugin-st10:00:001
107143699521,36cyclictest15-21rcuc/009:25:010
107143999511,28cyclictest0-21swapper/112:25:001
1071436995142,7cyclictest1125587-21sendmail12:20:000
107143699511,48cyclictest0-21swapper/009:10:160
107143699510,8cyclictest0-21swapper/012:00:010
107144099509,10cyclictest1075903-21apt-get07:35:012
107144099509,10cyclictest1075903-21apt-get07:35:012
1071440995029,14cyclictest311ktimers/211:20:152
107143999501,27cyclictest0-21swapper/111:00:001
1071436995043,4cyclictest167350irq/118-8000000.ethernet-tx008:20:230
1071440994933,10cyclictest311ktimers/211:05:132
1071440994933,10cyclictest311ktimers/211:05:132
1071436994917,4cyclictest0-21swapper/011:10:000
1071436994917,4cyclictest0-21swapper/011:10:000
1071440994830,13cyclictest311ktimers/207:25:132
107143999480,27cyclictest22-21rcuc/111:25:011
107143999471,10cyclictest0-21swapper/108:40:191
107143699478,4cyclictest1123832-21sed12:05:290
1071436994737,6cyclictest0-21swapper/010:35:000
1071436994732,9cyclictest0-21swapper/012:30:280
1071436994732,9cyclictest0-21swapper/012:30:280
1071436994730,14cyclictest167350irq/118-8000000.ethernet-tx008:40:130
1071440994638,5cyclictest0-21swapper/207:45:012
1071440994634,8cyclictest0-21swapper/208:30:292
1071439994627,10cyclictest0-21swapper/107:25:271
107143699464,37cyclictest1074797-21ps07:25:250
1071440994529,12cyclictest311ktimers/211:55:152
1071440994526,13cyclictest311ktimers/212:25:142
1071439994532,9cyclictest0-21swapper/110:10:281
1071439994528,8cyclictest22-21rcuc/107:20:011
107143999451,27cyclictest0-21swapper/112:35:011
107143999451,27cyclictest0-21swapper/112:35:011
1071436994538,3cyclictest1107791-21apt10:40:000
1071436994538,3cyclictest1107791-21apt10:40:000
1071436994533,9cyclictest0-21swapper/011:20:000
1071436994533,9cyclictest0-21swapper/011:20:000
107143699452,41cyclictest0-21swapper/009:00:200
107143699451,2cyclictest0-21swapper/010:10:010
1071440994431,9cyclictest0-21swapper/208:05:002
1071440994423,15cyclictest311ktimers/212:35:152
107143999441,3cyclictest0-21swapper/109:10:011
1071436994438,3cyclictest167350irq/118-8000000.ethernet-tx009:50:120
107143699443,6cyclictest15-21rcuc/007:50:030
1071436994434,8cyclictest1104418-21munin-plugin-st10:20:000
1071439994335,4cyclictest47-21kauditd08:20:011
107143999431,4cyclictest0-21swapper/111:45:011
107143699431,4cyclictest0-21swapper/008:05:120
107143699431,38cyclictest0-21swapper/011:25:010
107143699431,35cyclictest0-21swapper/012:25:010
1071440994224,10cyclictest311ktimers/212:20:112
1071439994234,3cyclictest0-21swapper/110:30:151
1071439994233,5cyclictest0-21swapper/110:50:281
1071439994233,5cyclictest0-21swapper/110:50:281
1071439994229,9cyclictest0-21swapper/111:10:261
107143999421,25cyclictest0-21swapper/111:10:011
107143999421,25cyclictest0-21swapper/111:10:011
1071439994210,25cyclictest231ktimers/111:48:411
1071439994210,25cyclictest231ktimers/111:48:411
107143699426,30cyclictest0-21swapper/009:20:010
1071436994237,2cyclictest0-21swapper/011:50:230
1071436994225,8cyclictest0-21swapper/011:15:010
107143699421,5cyclictest1122696-21meminfo12:00:220
107143699421,5cyclictest1122696-21meminfo12:00:220
1071440994130,6cyclictest1078428-21grep07:45:272
1071440994121,14cyclictest311ktimers/209:15:122
1071440994110,6cyclictest0-21swapper/209:25:012
107143999414,20cyclictest1088214-21/usr/sbin/munin08:45:171
1071439994130,5cyclictest0-21swapper/108:35:251
1071439994129,9cyclictest0-21swapper/107:25:001
1071436994135,4cyclictest0-21swapper/008:50:200
1071436994131,6cyclictest0-21swapper/012:25:290
1071436994130,8cyclictest0-21swapper/012:39:590
1071436994130,8cyclictest0-21swapper/007:20:270
1071436994129,7cyclictest0-21swapper/009:35:280
1071436994127,9cyclictest0-21swapper/010:10:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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