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2026-04-29 - 12:42

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 Wed Apr 29, 2026 00:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1696710991131,110cyclictest0-21swapper/019:29:100
16967119910933,42cyclictest231ktimers/119:29:101
169671699861,52cyclictest0-21swapper/320:15:023
169671699861,52cyclictest0-21swapper/320:15:023
1696711997615,45cyclictest1726971-21cat22:00:011
1696714997336,20cyclictest0-21swapper/220:45:002
1696714996631,10cyclictest14-21rcu_preempt00:20:012
1696710996357,4cyclictest131ktimers/021:50:000
1696710996152,4cyclictest0-21swapper/019:40:110
1696714995841,13cyclictest311ktimers/223:15:132
169671099574,23cyclictest15-21rcuc/020:45:010
169671499561,16cyclictest14-21rcu_preempt19:40:022
1696711995413,12cyclictest1747602-21/usr/sbin/munin00:00:201
169671499521,29cyclictest0-21swapper/221:10:022
169671499521,21cyclictest0-21swapper/223:00:012
169671099521,46cyclictest1745795-21latency_hist23:50:010
169671099521,46cyclictest1745795-21latency_hist23:50:000
169671499511,29cyclictest0-21swapper/219:55:012
169671499511,23cyclictest0-21swapper/219:20:012
1696710995031,15cyclictest131ktimers/022:45:280
169671099502,46cyclictest0-21swapper/000:15:130
169671499491,28cyclictest0-21swapper/219:50:002
169671499491,19cyclictest0-21swapper/221:05:022
1696710994939,5cyclictest20850irq/208-8000000.ethernet20:10:290
1696710994939,5cyclictest20850irq/208-8000000.ethernet20:10:290
1696710994832,14cyclictest167350irq/118-8000000.ethernet-tx020:50:160
169671199471,7cyclictest0-21swapper/121:45:011
169671099477,38cyclictest1720857-21sed21:20:290
1696710994730,15cyclictest167350irq/118-8000000.ethernet-tx023:30:280
1696710994729,15cyclictest167350irq/118-8000000.ethernet-tx021:50:240
1696710994729,15cyclictest167350irq/118-8000000.ethernet-tx019:15:050
1696710994729,12cyclictest20850irq/208-8000000.ethernet19:40:010
1696714994633,9cyclictest0-21swapper/220:05:012
1696714994633,9cyclictest0-21swapper/220:05:012
169671499462,21cyclictest1735485-21apt-get22:50:012
1696710994638,4cyclictest167350irq/118-8000000.ethernet-tx023:25:300
169671099462,39cyclictest1743959-21sed23:35:290
1696710994615,29cyclictest1740696-21latency_hist23:20:000
169671099461,43cyclictest0-21swapper/020:35:160
169671499451,7cyclictest0-21swapper/200:25:022
1696711994532,9cyclictest0-21swapper/122:20:291
1696711994532,9cyclictest0-21swapper/122:20:281
1696711994528,13cyclictest231ktimers/122:50:151
1696711994528,12cyclictest231ktimers/123:45:111
1696711994528,12cyclictest231ktimers/123:45:111
169671099451,42cyclictest0-21swapper/023:40:240
169671499441,29cyclictest0-21swapper/223:30:002
1696711994410,19cyclictest22-21rcuc/120:40:001
1696710994438,3cyclictest167350irq/118-8000000.ethernet-tx000:20:280
169671099442,6cyclictest1752500-21grep00:25:290
169671099441,6cyclictest0-21swapper/020:25:000
169671099441,6cyclictest0-21swapper/020:25:000
169671499432,26cyclictest0-21swapper/200:00:012
169671199434,34cyclictest22-21rcuc/100:35:011
1696711994331,8cyclictest1739692-21grep23:10:301
1696711994326,11cyclictest0-21swapper/123:20:251
1696711994325,11cyclictest0-21swapper/121:20:191
1696710994336,4cyclictest167350irq/118-8000000.ethernet-tx023:55:280
1696710994318,23cyclictest0-21swapper/021:10:010
169671499429,17cyclictest30-21rcuc/220:40:002
1696714994233,4cyclictest0-21swapper/219:29:112
1696711994232,7cyclictest0-21swapper/121:30:291
1696711994228,10cyclictest1707208-21grep20:00:281
1696711994228,10cyclictest1707208-21grep20:00:281
1696711994224,10cyclictest0-21swapper/123:25:221
1696711994222,14cyclictest231ktimers/123:30:131
1696710994236,3cyclictest167350irq/118-8000000.ethernet-tx021:55:210
1696710994235,4cyclictest167350irq/118-8000000.ethernet-tx021:00:280
169671099422,4cyclictest1753663-21df00:35:160
169671099421,3cyclictest1708320-21latency_hist20:10:010
1696714994126,10cyclictest0-21swapper/222:40:212
1696714994123,9cyclictest0-21swapper/223:30:252
169671199413,7cyclictest0-21swapper/123:10:021
169671199413,7cyclictest0-21swapper/123:10:011
1696711994135,4cyclictest0-21swapper/120:15:011
1696711994135,4cyclictest0-21swapper/120:15:011
169671199413,13cyclictest22-21rcuc/121:15:011
1696711994129,8cyclictest0-21swapper/122:45:291
1696711994125,10cyclictest1733686-21grep22:35:291
1696711994123,11cyclictest0-21swapper/120:30:261
1696710994130,7cyclictest0-21swapper/020:00:280
1696710994130,7cyclictest0-21swapper/020:00:280
1696710994124,15cyclictest0-21swapper/019:55:280
1696710994124,14cyclictest167350irq/118-8000000.ethernet-tx020:30:290
169671099411,5cyclictest0-21swapper/023:15:000
169671099411,38cyclictest1741461-21uptime23:20:270
169671099411,38cyclictest0-21swapper/021:30:210
169671099411,37cyclictest0-21swapper/022:40:250
169671099411,37cyclictest0-21swapper/021:20:020
169671099411,37cyclictest0-21swapper/021:20:020
1696714994028,4cyclictest167550irq/134-8000000.ethernet-tx220:05:232
1696711994031,6cyclictest1259-21in:imklog00:24:591
1696710994033,4cyclictest167350irq/118-8000000.ethernet-tx022:00:170
1696710994030,5cyclictest0-21swapper/020:55:220
1696710994029,8cyclictest1753473-21latency_hist00:35:000
1696710994028,8cyclictest0-21swapper/000:05:290
1696710994026,10cyclictest0-21swapper/022:35:290
169671099402,4cyclictest1709629-21memory20:15:240
1696710994024,10cyclictest0-21swapper/020:25:300
169671099401,37cyclictest0-21swapper/022:15:210
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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