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2026-07-21 - 21:21

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 Tue Jul 21, 2026 12:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
411606999598,12cyclictest4150805-21rm10:30:010
4116069995748,6cyclictest167350irq/118-8000000.ethernet-tx009:15:310
411606999561,53cyclictest0-21swapper/010:35:180
4116070995536,13cyclictest231ktimers/110:35:121
4116072995343,7cyclictest4122423-21munin-plugin-st07:45:002
411606999531,49cyclictest0-21swapper/008:00:130
4116072995240,8cyclictest4119678-21unixbench_multi07:25:322
4116069995242,4cyclictest4148455-21fschecks_time10:15:210
4116070995138,9cyclictest1283-21cron11:15:001
4116072995038,8cyclictest1283-21cron07:55:002
4116069995035,11cyclictest0-21swapper/009:30:000
411606999501,47cyclictest0-21swapper/011:05:120
411606999501,47cyclictest0-21swapper/011:05:120
411606999501,43cyclictest4120643-21apt-config07:35:000
411606999499,4cyclictest0-21swapper/012:00:010
411607099482,5cyclictest0-21swapper/111:45:001
411606999482,43cyclictest4130667-21find08:30:310
411606999481,45cyclictest0-21swapper/007:40:270
4116072994733,10cyclictest30-21rcuc/209:25:012
4116072994732,9cyclictest0-21swapper/208:35:312
4116069994741,3cyclictest167350irq/118-8000000.ethernet-tx009:10:000
4116069994639,4cyclictest167350irq/118-8000000.ethernet-tx012:25:240
4116069994639,4cyclictest167350irq/118-8000000.ethernet-tx007:15:010
4116069994616,6cyclictest4168709-21dropbear12:15:170
411606999461,10cyclictest0-21swapper/012:35:010
4116072994532,8cyclictest0-21swapper/209:05:272
411607099456,2cyclictest0-21swapper/110:00:011
411607099455,25cyclictest231ktimers/108:50:011
4116070994536,5cyclictest4118009-21munin-plugin-st07:20:001
4116070994533,7cyclictest0-21swapper/111:35:301
4116070994510,4cyclictest83250systemd-network09:25:011
411606999452,37cyclictest0-21swapper/012:35:190
411606999452,37cyclictest0-21swapper/012:35:190
4116072994433,7cyclictest0-21swapper/211:25:302
4116072994432,8cyclictest0-21swapper/212:10:292
4116072994431,7cyclictest0-21swapper/208:15:292
4116072994431,10cyclictest4172766-21munin-plugin-st12:40:002
4116072994431,10cyclictest4172766-21munin-plugin-st12:40:002
4116070994431,8cyclictest0-21swapper/107:45:291
4116070994430,9cyclictest0-21swapper/111:45:301
4116070994430,9cyclictest0-21swapper/111:45:291
4116070994429,10cyclictest0-21swapper/107:40:291
4116070994425,13cyclictest231ktimers/109:05:111
4116070994413,13cyclictest4158518-21/usr/sbin/munin11:15:211
4116072994329,8cyclictest0-21swapper/210:45:262
4116072994328,8cyclictest0-21swapper/209:45:292
4116072994310,26cyclictest4146034-21phc2sys-jitter10:00:272
4116070994335,5cyclictest4144454-21munin-plugin-st09:55:001
4116070994325,12cyclictest0-21swapper/108:15:211
411606999433,5cyclictest4123617-21fschecks_time07:50:190
4116069994327,13cyclictest4169797-21kernelversion12:20:230
411606999432,37cyclictest4159043-21grep11:15:310
411606999431,36cyclictest0-21swapper/010:30:010
4116072994231,7cyclictest0-21swapper/208:10:292
4116072994230,7cyclictest0-21swapper/210:40:282
4116072994229,9cyclictest0-21swapper/207:15:292
4116072994228,9cyclictest0-21swapper/208:30:312
4116072994228,8cyclictest0-21swapper/208:00:312
411607299421,3cyclictest0-21swapper/211:20:012
4116070994236,3cyclictest4118863-21munin-run07:25:001
4116069994235,4cyclictest167350irq/118-8000000.ethernet-tx010:55:210
4116069994232,7cyclictest0-21swapper/009:55:200
411606999421,39cyclictest0-21swapper/009:00:190
4116072994131,5cyclictest0-21swapper/207:45:292
4116070994132,5cyclictest4166717-21grep12:00:301
4116070994125,12cyclictest231ktimers/111:55:171
4116069994126,10cyclictest0-21swapper/011:40:010
4116069994116,16cyclictest19750irq/27-20000000.i2c11:00:190
411606999411,4cyclictest4147164-21latency_hist10:10:010
4116072994031,5cyclictest4169197-21grep12:15:302
4116072994029,6cyclictest0-21swapper/212:05:292
4116072994027,8cyclictest0-21swapper/212:30:312
4116072994026,9cyclictest0-21swapper/209:55:012
4116070994031,4cyclictest0-21swapper/107:15:001
4116070994029,7cyclictest4149733-21grep10:20:281
4116070994027,9cyclictest0-21swapper/112:10:301
4116069994034,4cyclictest0-21swapper/008:50:290
4116069994034,3cyclictest167350irq/118-8000000.ethernet-tx007:25:060
411606999403,32cyclictest4142680-21grep09:40:280
4116069994032,4cyclictest0-21swapper/012:05:270
4116069994032,4cyclictest0-21swapper/007:45:290
411606999403,10cyclictest4118861-21apt-get07:25:010
4116069994029,6cyclictest0-21swapper/011:45:290
4116069994029,6cyclictest0-21swapper/011:45:290
411606999402,4cyclictest4128635-21grep08:20:210
411606999402,3cyclictest0-21swapper/009:30:280
411606999401,3cyclictest4153768-21meminfo10:45:230
411606999401,37cyclictest0-21swapper/010:00:170
411606999401,36cyclictest0-21swapper/007:15:050
4116072993928,7cyclictest0-21swapper/210:25:302
4116072993925,10cyclictest0-21swapper/210:30:282
4116070993928,7cyclictest4140187-21grep09:25:291
4116070993928,7cyclictest0-21swapper/107:35:001
4116070993926,9cyclictest0-21swapper/108:35:001
411607099392,30cyclictest0-21swapper/112:05:171
4116070993922,9cyclictest0-21swapper/108:00:291
411607099391,32cyclictest1660-21snmpd10:00:151
4116069993933,3cyclictest4141616-21/usr/sbin/munin09:35:240
4116069993933,3cyclictest4141616-21/usr/sbin/munin09:35:240
4116069993925,6cyclictest0-21swapper/010:20:270
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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