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2026-03-20 - 03:59

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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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 Fri Mar 20, 2026 00:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
407663699741,3cyclictest0-21swapper/021:05:100
4076640997240,28cyclictest4127794-21cron00:10:002
4076640997028,5cyclictest0-21swapper/219:30:262
4076640996632,28cyclictest0-21swapper/200:10:272
4076640996625,6cyclictest4124324-21unixbench_multi23:45:292
4076640996531,30cyclictest0-21swapper/221:20:292
4076640996434,27cyclictest4122736-21munin-plugin-st23:40:002
4076640996426,6cyclictest0-21swapper/223:20:012
4076640996420,6cyclictest0-21swapper/220:10:202
4076640996420,6cyclictest0-21swapper/220:10:202
4076640996125,4cyclictest0-21swapper/222:50:192
4076640995926,7cyclictest0-21swapper/220:35:272
407663699581,10cyclictest0-21swapper/020:20:180
4076640995716,32cyclictest4089846-21/usr/sbin/munin20:25:202
407663699562,36cyclictest0-21swapper/019:40:010
4076637995535,15cyclictest231ktimers/119:50:131
407664099546,39cyclictest4098273-21/usr/sbin/munin21:15:182
4076640995326,5cyclictest0-21swapper/222:25:212
4076640995326,5cyclictest0-21swapper/222:25:212
4076637995346,5cyclictest231ktimers/121:20:011
4076636995344,6cyclictest4119174-21grep23:15:280
407663699521,8cyclictest0-21swapper/000:00:200
4076637995143,4cyclictest4113367-21grep22:45:001
4076637995142,4cyclictest4119175-21unixbench_multi23:15:281
407663699512,11cyclictest0-21swapper/000:25:190
4076636995116,31cyclictest0-21swapper/021:30:290
407663799508,9cyclictest4077645-21munin-node19:15:021
4076637995031,13cyclictest231ktimers/121:35:101
4076640994934,9cyclictest0-21swapper/223:15:002
4076637994830,12cyclictest231ktimers/122:10:141
407663699483,42cyclictest0-21swapper/021:49:590
407663699483,13cyclictest15-21rcuc/020:40:020
407663699482,10cyclictest0-21swapper/022:30:010
407663699482,10cyclictest0-21swapper/022:30:010
4076637994632,6cyclictest4112391-21grep22:35:281
4076637994632,10cyclictest0-21swapper/121:45:001
4076637994632,10cyclictest0-21swapper/121:45:001
4076637994629,10cyclictest0-21swapper/123:05:261
4076637994629,10cyclictest0-21swapper/123:05:261
407663799462,8cyclictest0-21swapper/119:40:011
4076636994636,6cyclictest0-21swapper/023:20:190
4076640994534,7cyclictest0-21swapper/219:20:262
4076640994534,7cyclictest0-21swapper/219:20:262
4076637994541,2cyclictest0-21swapper/122:35:001
4076637994532,8cyclictest0-21swapper/100:10:271
4076636994527,13cyclictest131ktimers/022:30:130
407663699451,12cyclictest4088698-21apt-get20:20:000
4076640994435,6cyclictest4113366-21munin-plugin-st22:45:002
4076640994431,7cyclictest4083576-21unixbench_singl19:45:282
4076637994431,8cyclictest0-21swapper/119:20:271
4076637994431,8cyclictest0-21swapper/119:20:271
4076637994428,11cyclictest231ktimers/122:45:131
4076636994433,6cyclictest4109838-21grep22:20:280
4076636994430,9cyclictest0-21swapper/023:45:290
4076636994429,9cyclictest0-21swapper/000:20:280
4076637994331,8cyclictest0-21swapper/120:45:281
4076637994331,8cyclictest0-21swapper/120:45:271
4076637994329,9cyclictest0-21swapper/122:25:021
4076637994323,15cyclictest231ktimers/100:30:141
407663799431,4cyclictest0-21swapper/123:40:001
4076636994332,8cyclictest0-21swapper/023:10:280
4076636994330,8cyclictest4077460-21latency_hist19:15:010
4076636994319,20cyclictest4127206-21cpu00:05:150
407663699431,40cyclictest0-21swapper/020:00:300
4076636994312,27cyclictest0-21swapper/021:05:000
4076640994230,8cyclictest0-21swapper/222:00:012
4076637994230,7cyclictest0-21swapper/121:45:281
4076637994227,11cyclictest231ktimers/119:25:111
407663699423,5cyclictest4094968-21diskstats20:55:180
4076636994233,5cyclictest20650irq/252-8000000.ethernet22:10:280
4076636994228,9cyclictest0-21swapper/021:40:010
4076636994228,9cyclictest0-21swapper/020:10:290
4076636994228,9cyclictest0-21swapper/020:10:290
4076636994228,11cyclictest0-21swapper/000:15:280
407663699422,5cyclictest4121301-21df23:30:160
407663699422,37cyclictest0-21swapper/021:15:210
407663699421,38cyclictest0-21swapper/023:40:190
407663699421,37cyclictest4079474-21ls19:25:010
407663699421,37cyclictest4079474-21ls19:25:010
407663699421,37cyclictest0-21swapper/000:10:260
407663699420,23cyclictest0-21swapper/020:45:250
407663699420,23cyclictest0-21swapper/020:45:250
4076640994134,4cyclictest4093023-21grep20:44:592
4076637994129,6cyclictest0-21swapper/119:45:281
4076637994111,17cyclictest4114402-21/usr/sbin/munin22:50:171
4076636994137,2cyclictest0-21swapper/021:40:210
4076636994137,2cyclictest0-21swapper/021:40:210
4076636994132,6cyclictest4106452-21grep22:00:280
4076636994130,7cyclictest0-21swapper/020:40:290
4076636994128,9cyclictest0-21swapper/000:30:290
407663699411,38cyclictest0-21swapper/022:40:210
4076637994030,5cyclictest0-21swapper/120:20:271
4076637994028,8cyclictest0-21swapper/121:25:211
407663699404,32cyclictest0-21swapper/000:35:260
4076636994031,4cyclictest19750irq/27-20000000.i2c23:30:010
407663699401,4cyclictest4108699-21meminfo22:15:240
407663699401,37cyclictest0-21swapper/022:35:260
407663699401,36cyclictest0-21swapper/021:20:170
407663699401,35cyclictest0-21swapper/021:55:010
4076640993924,10cyclictest0-21swapper/200:35:262
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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