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2026-06-14 - 07:57

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 Jun 14, 2026 00:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
35878299787,47cyclictest0-21swapper/220:35:012
35878299583,18cyclictest0-21swapper/221:05:012
358777995828,25cyclictest0-21swapper/022:10:260
358777995645,6cyclictest376938-21munin-plugin-st20:55:000
358777995645,6cyclictest376938-21munin-plugin-st20:55:000
35878299551,33cyclictest370930-21apt-get20:20:012
358782995221,14cyclictest369446-21/usr/sbin/munin20:10:192
358782995217,28cyclictest364677-21kernelversion19:40:232
358777995242,6cyclictest0-21swapper/022:15:290
358777995143,4cyclictest369249-21munin-plugin-st20:10:000
35878099501,25cyclictest0-21swapper/120:35:011
358777995044,3cyclictest0-21swapper/000:20:120
358782994935,10cyclictest0-21swapper/200:25:282
35877799492,12cyclictest0-21swapper/000:20:010
358777994840,5cyclictest410140-21munin-plugin-st00:09:590
358777994839,4cyclictest167350irq/118-8000000.ethernet-tx023:00:180
35877799482,41cyclictest379413-21head21:05:310
35877799481,16cyclictest131ktimers/021:45:010
358782994738,4cyclictest360716-21munin-plugin-st19:20:002
358782994734,9cyclictest0-21swapper/223:05:002
35878099477,33cyclictest0-21swapper/121:35:231
358780994732,10cyclictest0-21swapper/120:55:301
358777994741,3cyclictest167350irq/118-8000000.ethernet-tx020:20:150
358782994624,15cyclictest0-21swapper/223:35:202
358777994640,4cyclictest408437-21cron00:00:000
358777994631,9cyclictest0-21swapper/022:25:010
35877799462,3cyclictest384207-21/usr/sbin/munin21:35:240
358777994615,4cyclictest0-21swapper/023:35:210
358782994533,9cyclictest1283-21cron22:10:002
35878099457,3cyclictest0-21swapper/123:10:161
358782994435,5cyclictest401460-21grep23:15:282
358782994433,8cyclictest311ktimers/221:15:142
358782994433,8cyclictest311ktimers/221:15:142
358782994432,7cyclictest0-21swapper/220:20:312
358782994415,27cyclictest368260-21tr20:00:292
358780994432,8cyclictest0-21swapper/122:25:011
358780994428,11cyclictest0-21swapper/100:00:291
358780994428,11cyclictest0-21swapper/100:00:291
358777994437,4cyclictest20850irq/208-8000000.ethernet19:45:200
358777994437,4cyclictest20850irq/208-8000000.ethernet19:45:200
358780994336,4cyclictest371781-21unixbench_multi20:20:311
358780994330,9cyclictest411823-21munin-plugin-st00:20:011
358780994327,9cyclictest402329-21grep23:20:291
35877799438,25cyclictest371064-21cat20:20:010
35877799433,4cyclictest395144-21sh22:40:210
358777994327,12cyclictest0-21swapper/021:00:290
358777994326,14cyclictest167350irq/118-8000000.ethernet-tx000:00:110
358777994326,14cyclictest167350irq/118-8000000.ethernet-tx000:00:110
35877799431,40cyclictest0-21swapper/021:25:210
35877799431,40cyclictest0-21swapper/019:30:250
358782994230,5cyclictest384546-21sendmail21:40:002
358780994233,5cyclictest0-21swapper/120:45:261
358780994227,8cyclictest0-21swapper/122:25:281
358780994227,10cyclictest0-21swapper/100:10:361
35877799421,35cyclictest0-21swapper/019:25:010
35877799421,35cyclictest0-21swapper/019:25:010
35878099414,3cyclictest0-21swapper/120:30:011
358777994134,4cyclictest167350irq/118-8000000.ethernet-tx023:05:290
358777994132,6cyclictest0-21swapper/020:44:590
358777994132,6cyclictest0-21swapper/019:50:310
358777994127,9cyclictest0-21swapper/019:55:280
35877799412,4cyclictest362155-21meminfo19:25:230
35877799411,4cyclictest0-21swapper/021:30:180
35877799411,38cyclictest0-21swapper/020:00:200
358782994032,4cyclictest167550irq/134-8000000.ethernet-tx219:45:232
358782994032,4cyclictest167550irq/134-8000000.ethernet-tx219:45:232
358782994031,6cyclictest0-21swapper/219:25:282
358782994028,9cyclictest0-21swapper/223:25:012
358780994033,4cyclictest0-21swapper/120:35:281
358780994032,4cyclictest167450irq/126-8000000.ethernet-tx122:55:261
358780994030,6cyclictest388661-21grep22:00:291
358777994034,3cyclictest167350irq/118-8000000.ethernet-tx022:25:130
358777994030,7cyclictest0-21swapper/023:30:280
358777994027,9cyclictest0-21swapper/000:35:010
35877799401,37cyclictest0-21swapper/020:25:200
358782993926,9cyclictest0-21swapper/222:00:312
358782993926,9cyclictest0-21swapper/221:05:302
358782993925,9cyclictest0-21swapper/222:15:292
358782993913,24cyclictest392677-21if_eth122:25:222
35878099395,18cyclictest374617-21/usr/sbin/munin20:40:191
358780993923,8cyclictest0-21swapper/122:35:281
358777993933,3cyclictest0-21swapper/000:10:320
358777993932,4cyclictest0-21swapper/022:45:240
358777993932,4cyclictest0-21swapper/022:45:240
358777993931,5cyclictest167350irq/118-8000000.ethernet-tx020:10:240
358777993931,4cyclictest167350irq/118-8000000.ethernet-tx023:25:250
358777993928,7cyclictest0-21swapper/000:25:290
358777993922,15cyclictest0-21swapper/023:55:010
358777993922,15cyclictest0-21swapper/023:20:140
35877799391,4cyclictest364147-21users19:35:320
35877799391,3cyclictest374404-21munin-run20:40:000
35877799391,36cyclictest0-21swapper/022:55:230
35878299388,27cyclictest0-21swapper/221:45:272
35878299388,15cyclictest407803-21/usr/sbin/munin23:55:192
358782993826,7cyclictest0-21swapper/200:15:282
358782993810,25cyclictest386672-21if_eth121:50:232
358780993829,5cyclictest0-21swapper/119:55:281
358780993829,5cyclictest0-21swapper/100:35:291
358780993827,6cyclictest403156-21grep23:25:281
358780993826,8cyclictest0-21swapper/121:50:281
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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