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2026-09-03 - 10:11

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 Thu Sep 03, 2026 00:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
49552699847,31cyclictest231ktimers/120:45:181
495526998352,17cyclictest0-21swapper/119:45:011
49552699693,27cyclictest548550-21apt-get00:20:011
49552699582,29cyclictest22-21rcuc/100:05:011
49552699573,29cyclictest22-21rcuc/119:15:021
49552599563,49cyclictest512170-21sh20:45:190
49552599561,53cyclictest0-21swapper/019:55:120
495525995343,5cyclictest167350irq/118-8000000.ethernet-tx020:25:260
49552599533,46cyclictest517758-21sed21:15:300
495525995330,16cyclictest0-21swapper/023:00:010
495525995244,4cyclictest12-21ksoftirqd/022:10:330
495525995243,5cyclictest167350irq/118-8000000.ethernet-tx019:10:180
495525995243,5cyclictest167350irq/118-8000000.ethernet-tx000:25:310
495525995225,24cyclictest1-21systemd22:50:160
49552899514,33cyclictest552143-21gpgv00:40:012
495525995146,3cyclictest0-21swapper/023:25:120
495525995146,3cyclictest0-21swapper/023:25:120
49552599513,4cyclictest0-21swapper/021:50:290
495525995125,5cyclictest131ktimers/022:00:240
495526995039,8cyclictest528973-21munin-plugin-st22:25:001
495526995038,8cyclictest0-21swapper/119:20:001
495526995038,8cyclictest0-21swapper/119:20:001
495525995036,8cyclictest528163-21latency_hist22:20:010
495528994931,12cyclictest311ktimers/221:05:142
49552599494,41cyclictest0-21swapper/019:50:280
495528994825,11cyclictest0-21swapper/222:30:012
495528994825,11cyclictest0-21swapper/222:30:012
49552599486,36cyclictest541214-21sh23:35:200
495525994840,4cyclictest20650irq/252-8000000.ethernet22:20:170
49552599481,44cyclictest0-21swapper/022:05:110
495528994738,6cyclictest537431-21grep23:10:332
495528994738,5cyclictest544246-21munin-plugin-st23:55:012
495528994730,12cyclictest311ktimers/221:40:122
495528994718,15cyclictest311ktimers/219:15:132
495528994718,15cyclictest311ktimers/219:15:122
495526994737,7cyclictest521096-21unixbench_multi21:35:301
49552699473,26cyclictest22-21rcuc/121:50:011
49552699471,6cyclictest0-21swapper/121:15:011
49552599479,12cyclictest0-21swapper/022:00:020
495525994736,7cyclictest0-21swapper/000:25:020
495526994620,17cyclictest0-21swapper/122:55:191
49552599466,37cyclictest0-21swapper/023:30:190
495525994638,5cyclictest518616-21grep21:20:310
495525994638,5cyclictest518616-21grep21:20:310
495525994629,15cyclictest167350irq/118-8000000.ethernet-tx019:35:120
49552599462,8cyclictest0-21swapper/022:45:020
495525994628,11cyclictest0-21swapper/023:50:290
49552599462,17cyclictest544515-21/usr/sbin/munin23:55:170
495525994615,27cyclictest510882-21tail20:35:280
49552599461,43cyclictest0-21swapper/020:15:280
49552599461,14cyclictest0-21swapper/023:15:010
49552899457,15cyclictest30-21rcuc/221:50:012
495528994533,9cyclictest519399-21grep21:25:292
495528994532,8cyclictest0-21swapper/219:10:292
495526994534,6cyclictest832-21systemd-network00:05:231
495526994521,13cyclictest231ktimers/100:25:131
49552599459,5cyclictest131ktimers/021:35:000
495525994535,5cyclictest535730-21cat23:05:000
49552599452,4cyclictest515688-21perl21:05:220
49552599451,5cyclictest545944-21http00:05:000
495528994438,4cyclictest495520-21cyclictest20:05:332
495528994432,6cyclictest0-21swapper/221:55:282
495528994425,14cyclictest311ktimers/223:30:142
495528994425,13cyclictest311ktimers/221:00:142
495528994419,14cyclictest311ktimers/220:20:122
495526994437,4cyclictest499885-21unixbench_multi19:30:291
495526994437,4cyclictest499885-21unixbench_multi19:30:291
495526994436,4cyclictest0-21swapper/120:00:291
495526994430,10cyclictest231ktimers/123:50:141
495526994427,10cyclictest0-21swapper/122:40:291
49552599447,16cyclictest12-21ksoftirqd/019:20:010
49552599447,16cyclictest12-21ksoftirqd/019:20:010
49552599442,4cyclictest546711-21/usr/sbin/munin00:05:320
495528994325,11cyclictest311ktimers/219:25:122
495526994325,7cyclictest0-21swapper/120:25:261
495526994322,15cyclictest231ktimers/120:40:111
49552599436,35cyclictest0-21swapper/020:35:000
49552599435,10cyclictest0-21swapper/020:55:010
495525994331,6cyclictest0-21swapper/021:25:210
495525994327,9cyclictest0-21swapper/020:55:270
49552599432,39cyclictest12-21ksoftirqd/023:45:220
495528994225,12cyclictest311ktimers/222:35:112
495526994228,8cyclictest0-21swapper/123:05:271
495526994228,8cyclictest0-21swapper/123:05:271
495525994233,5cyclictest0-21swapper/022:45:250
495525994232,5cyclictest0-21swapper/021:40:290
495525994230,9cyclictest0-21swapper/019:30:290
495525994230,9cyclictest0-21swapper/019:30:290
495525994229,7cyclictest0-21swapper/019:45:310
495525994214,3cyclictest497895-21/usr/sbin/munin19:20:220
49552599421,3cyclictest0-21swapper/019:25:140
49552599421,38cyclictest0-21swapper/000:30:240
495528994132,5cyclictest0-21swapper/223:05:272
495528994132,5cyclictest0-21swapper/223:05:272
495528994129,8cyclictest0-21swapper/200:29:592
495528994126,10cyclictest311ktimers/220:30:122
49552899411,10cyclictest0-21swapper/222:20:022
495526994130,5cyclictest0-21swapper/100:39:591
495526994129,7cyclictest0-21swapper/100:25:011
495526994128,9cyclictest231ktimers/121:00:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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