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2026-03-28 - 01:00

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 Fri Mar 27, 2026 12:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
230916399612,37cyclictest2329852-21apt-get09:10:012
230916099615,23cyclictest2365571-21apt-get12:40:011
230915999541,6cyclictest0-21swapper/009:00:110
230915999541,6cyclictest0-21swapper/009:00:100
2309163995344,6cyclictest2358826-21munin-plugin-st12:00:002
2309160995038,8cyclictest0-21swapper/107:29:591
2309163994936,8cyclictest0-21swapper/212:40:012
2309160994833,9cyclictest0-21swapper/110:15:291
2309159994840,5cyclictest167350irq/118-8000000.ethernet-tx009:15:240
2309159994836,9cyclictest2358830-21sendmail12:00:000
2309159994828,17cyclictest0-21swapper/009:50:150
230915999481,31cyclictest0-21swapper/008:40:020
2309163994725,2cyclictest14-21rcu_preempt11:05:272
2309163994724,16cyclictest311ktimers/207:25:132
230915999476,5cyclictest2326385-21apt-get08:50:010
2309159994742,3cyclictest0-21swapper/007:20:200
2309159994738,5cyclictest167350irq/118-8000000.ethernet-tx009:30:320
230915999472,4cyclictest2365448-21xargs12:35:270
2309159994714,18cyclictest2352198-21/usr/sbin/munin11:20:190
2309163994634,8cyclictest0-21swapper/208:50:282
2309163994632,9cyclictest0-21swapper/209:00:282
2309163994632,9cyclictest0-21swapper/209:00:282
2309160994636,7cyclictest2359592-21grep12:00:281
230915999466,2cyclictest0-21swapper/011:50:010
230915999465,9cyclictest0-21swapper/007:25:190
2309159994639,4cyclictest167350irq/118-8000000.ethernet-tx009:10:170
2309160994535,7cyclictest0-21swapper/111:00:001
2309160994532,9cyclictest0-21swapper/107:15:021
2309160994511,28cyclictest0-21swapper/111:40:271
230915999456,16cyclictest0-21swapper/011:10:010
2309163994435,6cyclictest2356220-21grep11:40:282
2309163994431,9cyclictest0-21swapper/211:10:282
2309160994433,8cyclictest2345150-21sendmail10:40:001
2309160994428,9cyclictest0-21swapper/107:19:591
2309160994427,10cyclictest0-21swapper/109:10:281
230915999447,5cyclictest0-21swapper/009:25:010
2309159994436,4cyclictest2339241-21munin-plugin-st10:05:000
2309159994436,4cyclictest2339241-21munin-plugin-st10:04:590
2309159994434,5cyclictest167350irq/118-8000000.ethernet-tx011:15:010
2309159994431,9cyclictest0-21swapper/007:30:190
2309159994429,13cyclictest167350irq/118-8000000.ethernet-tx010:35:140
230915999441,8cyclictest0-21swapper/008:00:010
2309163994333,6cyclictest0-21swapper/210:15:282
2309163994332,8cyclictest2324697-21sendmail08:39:592
2309163994331,8cyclictest0-21swapper/210:10:002
2309160994334,5cyclictest0-21swapper/110:50:281
2309160994333,5cyclictest0-21swapper/108:45:191
2309159994339,2cyclictest0-21swapper/009:10:000
230915999431,40cyclictest0-21swapper/008:30:130
230915999431,37cyclictest0-21swapper/008:40:010
2309163994233,5cyclictest167550irq/134-8000000.ethernet-tx212:20:182
2309160994231,7cyclictest0-21swapper/111:25:271
2309160994231,7cyclictest0-21swapper/111:25:271
2309160994231,5cyclictest2333280-21grep09:25:281
2309160994230,8cyclictest0-21swapper/107:40:301
2309160994228,9cyclictest0-21swapper/108:35:251
2309160994222,10cyclictest0-21swapper/112:10:281
2309160994222,10cyclictest0-21swapper/112:10:281
2309159994229,9cyclictest0-21swapper/011:35:230
230915999422,5cyclictest2340578-21meminfo10:10:250
230916399419,25cyclictest0-21swapper/207:10:002
2309163994132,6cyclictest2323011-21munin-plugin-st08:30:012
2309163994129,8cyclictest0-21swapper/209:35:272
2309163994129,7cyclictest0-21swapper/209:25:272
2309163994128,8cyclictest0-21swapper/209:40:282
2309163994127,10cyclictest0-21swapper/212:34:592
2309160994132,6cyclictest0-21swapper/107:55:281
2309160994127,9cyclictest0-21swapper/107:35:301
230916099411,5cyclictest0-21swapper/109:10:011
2309159994135,3cyclictest167350irq/118-8000000.ethernet-tx009:40:170
2309159994127,9cyclictest0-21swapper/008:20:000
230915999411,5cyclictest2327314-21apt08:55:010
230915999411,37cyclictest2342881-21ssh10:25:170
2309163994033,5cyclictest2343460-21munin-plugin-st10:30:002
2309163994032,5cyclictest2334165-21munin-plugin-st09:34:592
2309163994030,6cyclictest2345028-21grep10:35:282
2309163994030,6cyclictest2313580-21grep07:30:292
2309163994029,8cyclictest0-21swapper/211:30:272
2309163994027,8cyclictest0-21swapper/208:45:262
2309163994027,8cyclictest0-21swapper/208:10:292
2309163994024,10cyclictest0-21swapper/207:10:212
2309160994029,7cyclictest0-21swapper/110:40:271
230915999404,7cyclictest0-21swapper/007:40:270
2309159994028,9cyclictest0-21swapper/010:30:210
2309163993931,6cyclictest2359620-21grep12:00:302
2309163993926,8cyclictest0-21swapper/209:10:282
2309163993922,8cyclictest0-21swapper/207:40:302
2309163993921,15cyclictest311ktimers/212:25:132
2309163993921,12cyclictest311ktimers/207:15:112
2309163993920,14cyclictest311ktimers/211:45:122
2309160993927,9cyclictest0-21swapper/109:49:591
2309160993921,13cyclictest231ktimers/108:50:111
230916099391,5cyclictest0-21swapper/107:50:011
230916099391,5cyclictest0-21swapper/107:50:011
2309159993935,2cyclictest0-21swapper/010:50:280
2309159993932,4cyclictest167350irq/118-8000000.ethernet-tx009:35:160
2309159993929,6cyclictest0-21swapper/009:55:150
2309159993928,7cyclictest0-21swapper/011:00:270
2309159993927,8cyclictest0-21swapper/012:15:280
2309159993923,12cyclictest131ktimers/007:35:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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