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2026-05-16 - 04:14

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 Sat May 16, 2026 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4116968995811,8cyclictest4117791-21munin-node19:15:020
411697199557,43cyclictest22-21rcuc/121:55:021
411697199557,43cyclictest22-21rcuc/121:55:021
4116972995235,14cyclictest311ktimers/221:50:122
4116972995235,14cyclictest311ktimers/221:50:112
4116968995240,7cyclictest0-21swapper/021:10:250
4116971995136,11cyclictest0-21swapper/122:30:001
411697299506,26cyclictest0-21swapper/223:25:012
411697299504,28cyclictest32-21ksoftirqd/220:45:012
4116971995042,4cyclictest4140294-21munin-plugin-st21:25:011
411697199501,22cyclictest0-21swapper/120:05:191
4116968994913,3cyclictest0-21swapper/023:55:010
411697199489,22cyclictest4126780-21apt-key20:05:011
4116971994839,4cyclictest0-21swapper/121:25:271
411696899481,17cyclictest0-21swapper/020:25:010
411697299474,12cyclictest32-21ksoftirqd/223:15:022
411697299474,12cyclictest32-21ksoftirqd/223:15:012
4116972994738,5cyclictest4153012-21grep22:35:282
4116972994738,5cyclictest4153012-21grep22:35:282
4116971994739,4cyclictest4122384-21apt-get19:40:001
4116971994731,8cyclictest4125727-21grep19:55:281
4116968994740,4cyclictest167350irq/118-8000000.ethernet-tx023:30:300
411696899472,14cyclictest274-21systemd-journal23:05:000
4116972994610,16cyclictest0-21swapper/220:05:012
411697199467,9cyclictest4121598-21gpg-connect-age19:35:011
4116971994634,7cyclictest4159854-21grep23:15:271
4116968994632,9cyclictest0-21swapper/022:45:300
4116968994613,31cyclictest0-21swapper/022:50:210
4116972994538,4cyclictest4158280-21grep23:10:012
4116972994533,8cyclictest0-21swapper/200:25:312
4116972994533,7cyclictest0-21swapper/200:25:002
4116972994528,9cyclictest0-21swapper/200:30:262
4116972994526,8cyclictest0-21swapper/222:55:282
4116971994539,4cyclictest231ktimers/120:15:121
411697299443,8cyclictest30-21rcuc/222:10:012
4116972994414,10cyclictest4145435-21apt-get21:55:012
4116972994414,10cyclictest4145435-21apt-get21:55:012
411697199444,23cyclictest24-21ksoftirqd/100:10:011
4116971994437,5cyclictest231ktimers/122:20:001
4116971994434,7cyclictest0-21swapper/100:25:311
411697199441,8cyclictest0-21swapper/120:55:011
4116968994437,4cyclictest167350irq/118-8000000.ethernet-tx019:25:240
4116968994436,5cyclictest4136918-21munin-plugin-st21:05:000
4116968994434,5cyclictest0-21swapper/019:40:050
4116968994432,5cyclictest4125741-21unixbench_multi19:55:290
4116968994431,10cyclictest4149748-21munin-plugin-st22:19:590
411696899441,13cyclictest0-21swapper/022:25:010
4116972994333,5cyclictest4129305-21run-parts20:20:002
4116972994329,7cyclictest4150499-21grep22:20:282
4116972994329,10cyclictest0-21swapper/219:55:292
411697299431,27cyclictest0-21swapper/222:50:002
4116971994336,4cyclictest0-21swapper/122:55:271
4116971994335,4cyclictest0-21swapper/119:10:161
4116971994333,6cyclictest4160812-21cron23:25:011
4116971994331,8cyclictest4158209-21grep23:05:281
4116968994337,3cyclictest20650irq/252-8000000.ethernet20:30:200
4116968994336,4cyclictest167350irq/118-8000000.ethernet-tx020:57:430
4116968994336,4cyclictest0-21swapper/022:30:290
411696899432,6cyclictest4161090-21diskstats23:25:190
4116968994326,15cyclictest0-21swapper/021:05:270
4116968994326,15cyclictest0-21swapper/021:05:270
4116972994229,7cyclictest4134339-21grep20:45:262
4116971994228,9cyclictest4162443-21grep23:30:291
4116968994236,3cyclictest14-21rcu_preempt20:20:010
4116968994233,5cyclictest0-21swapper/021:35:290
4116972994132,5cyclictest0-21swapper/222:30:292
4116971994132,4cyclictest0-21swapper/120:20:281
4116971994128,8cyclictest0-21swapper/100:05:011
4116971994123,15cyclictest22-21rcuc/121:05:011
4116971994123,15cyclictest22-21rcuc/121:05:011
4116971994122,9cyclictest0-21swapper/123:10:281
4116971994122,9cyclictest0-21swapper/123:10:281
4116971994122,14cyclictest0-21swapper/119:20:271
4116968994132,5cyclictest167350irq/118-8000000.ethernet-tx021:40:180
4116968994132,5cyclictest167350irq/118-8000000.ethernet-tx021:40:180
4116968994132,4cyclictest4122420-21latency_hist19:40:010
4116968994130,8cyclictest0-21swapper/022:30:000
4116968994118,19cyclictest0-21swapper/022:00:180
411696899411,38cyclictest0-21swapper/021:25:280
411696899411,38cyclictest0-21swapper/020:40:130
4116972994030,6cyclictest0-21swapper/222:25:292
4116972994029,5cyclictest0-21swapper/221:30:192
4116972994028,8cyclictest0-21swapper/220:40:002
4116972994028,6cyclictest4121388-21grep19:30:292
4116972994027,9cyclictest4136063-21sendmail21:00:002
4116972994024,8cyclictest0-21swapper/223:35:282
4116972994024,8cyclictest0-21swapper/223:35:282
4116972994024,8cyclictest0-21swapper/200:00:162
4116971994029,6cyclictest0-21swapper/121:00:011
4116971994028,5cyclictest0-21swapper/122:50:191
411696899407,17cyclictest4169453-21/usr/sbin/munin00:15:190
411696899407,17cyclictest4169453-21/usr/sbin/munin00:15:180
4116968994033,4cyclictest167350irq/118-8000000.ethernet-tx000:00:180
4116968994028,7cyclictest0-21swapper/019:50:280
4116972993930,5cyclictest0-21swapper/220:50:292
4116972993930,4cyclictest0-21swapper/223:30:292
4116972993926,9cyclictest0-21swapper/219:20:292
4116972993925,6cyclictest0-21swapper/221:15:212
4116972993923,9cyclictest0-21swapper/219:35:272
4116971993930,4cyclictest14-21rcu_preempt19:50:291
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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