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2026-04-18 - 11:22

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 792 highest latencies:
System rackeslot6s.osadl.org (updated Sat Apr 18, 2026 00:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
35747499831,68cyclictest0-21swapper/022:10:110
35747899732,56cyclictest0-21swapper/223:45:012
357477997365,5cyclictest0-21swapper/121:05:011
357478997154,3cyclictest0-21swapper/220:50:012
35747899635,36cyclictest32-21ksoftirqd/220:35:012
357477995717,9cyclictest375539-21apt-get20:55:011
357478995645,7cyclictest406566-21munin-plugin-st23:55:002
357478995543,8cyclictest398802-21latency_hist23:10:022
357474995545,4cyclictest167350irq/118-8000000.ethernet-tx019:15:040
357474995412,39cyclictest412583-21sed00:30:010
35747899538,18cyclictest390939-21apt-key22:25:012
35747499531,49cyclictest0-21swapper/000:00:150
357477995110,13cyclictest401415-21apt-get23:25:011
357478995029,8cyclictest0-21swapper/220:50:262
357478994938,8cyclictest379948-21sendmail21:20:002
357478994938,8cyclictest379948-21sendmail21:20:002
35747899491,15cyclictest30-21rcuc/222:40:012
35747499491,8cyclictest0-21swapper/023:00:000
35747499491,44cyclictest368481-21ptp4l-jitter20:10:270
35747499491,42cyclictest0-21swapper/019:50:010
35747499491,2cyclictest0-21swapper/022:10:010
357478994835,9cyclictest0-21swapper/219:15:002
35747499482,41cyclictest387234-21phc2sys22:00:230
35747499482,24cyclictest15-21rcuc/022:50:010
35747499481,4cyclictest0-21swapper/000:35:110
357474994739,4cyclictest167350irq/118-8000000.ethernet-tx021:05:170
35747499471,44cyclictest0-21swapper/023:05:140
357478994637,5cyclictest0-21swapper/222:15:002
35747499466,36cyclictest15-21rcuc/020:20:010
357478994532,9cyclictest0-21swapper/223:20:272
357478994510,16cyclictest0-21swapper/221:30:112
357477994529,12cyclictest394424-21grep22:40:281
357477994523,16cyclictest231ktimers/123:50:101
35747499454,12cyclictest0-21swapper/019:35:010
357474994535,7cyclictest390928-21apt-get22:25:050
35747499453,4cyclictest366967-21head20:00:280
35747499452,9cyclictest0-21swapper/022:35:010
35747899445,27cyclictest361301-21/usr/sbin/munin19:30:182
357478994439,4cyclictest0-21swapper/222:30:012
357478994432,8cyclictest390087-21sendmail22:20:002
357477994432,8cyclictest0-21swapper/120:10:281
357477994422,16cyclictest231ktimers/122:35:111
357474994428,14cyclictest167350irq/118-8000000.ethernet-tx023:30:130
357474994428,14cyclictest167350irq/118-8000000.ethernet-tx023:30:120
357474994425,13cyclictest0-21swapper/019:15:000
357478994334,5cyclictest409092-21cron00:10:002
357478994333,6cyclictest311ktimers/221:35:122
357478994331,7cyclictest0-21swapper/219:25:292
357477994334,5cyclictest0-21swapper/123:00:201
357474994337,3cyclictest167350irq/118-8000000.ethernet-tx021:15:150
357474994337,3cyclictest167350irq/118-8000000.ethernet-tx021:15:150
35747499431,3cyclictest0-21swapper/023:45:010
35747499431,39cyclictest0-21swapper/021:50:230
357478994234,3cyclictest395325-21munin-plugin-st22:50:002
357478994225,9cyclictest0-21swapper/222:50:262
357477994235,5cyclictest231ktimers/100:15:151
357477994233,5cyclictest0-21swapper/122:55:001
357477994233,4cyclictest0-21swapper/119:10:281
357477994229,8cyclictest0-21swapper/120:00:001
357477994223,14cyclictest231ktimers/120:20:141
357474994235,4cyclictest20650irq/252-8000000.ethernet22:15:220
357474994235,4cyclictest0-21swapper/019:20:250
35747499422,4cyclictest383790-21irqstats21:40:220
35747499422,4cyclictest370395-21munin-run20:25:000
35747499421,39cyclictest0-21swapper/020:45:230
357478994129,7cyclictest363531-21grep19:40:282
357478994125,8cyclictest0-21swapper/222:30:282
357477994131,4cyclictest373004-21sendmail20:40:001
357477994122,14cyclictest231ktimers/122:10:121
357474994135,3cyclictest167350irq/118-8000000.ethernet-tx000:15:140
357474994134,2cyclictest0-21swapper/023:25:010
357474994129,8cyclictest379124-21latency_hist21:15:010
357474994128,9cyclictest0-21swapper/020:55:020
35747499411,4cyclictest0-21swapper/023:15:190
35747499411,4cyclictest0-21swapper/023:15:190
35747499411,38cyclictest0-21swapper/023:00:240
35747499411,38cyclictest0-21swapper/022:35:210
35747499411,38cyclictest0-21swapper/020:30:270
357478994031,5cyclictest409857-21grep00:10:262
357478994031,5cyclictest409857-21grep00:10:262
357478994028,8cyclictest0-21swapper/220:15:282
357478994027,6cyclictest0-21swapper/223:14:592
357478994026,9cyclictest0-21swapper/219:35:262
357478994026,9cyclictest0-21swapper/219:35:262
357477994020,14cyclictest231ktimers/120:40:131
357477994017,14cyclictest231ktimers/123:20:131
357474994030,7cyclictest376486-21sendmail21:00:000
357474994023,15cyclictest0-21swapper/019:35:210
357474994023,15cyclictest0-21swapper/019:35:210
35747499401,4cyclictest0-21swapper/021:00:180
35747499401,37cyclictest0-21swapper/023:25:110
35747499401,37cyclictest0-21swapper/000:30:240
35747499401,36cyclictest403542-21ssh23:35:200
35747499401,35cyclictest0-21swapper/019:30:010
35747499401,2cyclictest0-21swapper/021:35:010
35747499401,2cyclictest0-21swapper/020:10:010
357478993931,5cyclictest0-21swapper/200:00:002
357478993916,17cyclictest2-21kthreadd21:48:212
357478993913,15cyclictest0-21swapper/219:55:122
357477993935,2cyclictest0-21swapper/120:00:181
357477993934,2cyclictest0-21swapper/120:35:011
357477993930,5cyclictest374702-21munin-plugin-st20:50:001
357477993928,5cyclictest0-21swapper/119:20:191
357477993927,8cyclictest384956-21grep21:45:281
357477993925,10cyclictest0-21swapper/123:15:001
35747799392,22cyclictest24-21ksoftirqd/100:35:131
357477993914,22cyclictest22-21rcuc/100:25:011
35747499394,31cyclictest0-21swapper/021:55:270
35747499394,31cyclictest0-21swapper/021:55:270
35747499394,16cyclictest14-21rcu_preempt20:40:010
35747499391,36cyclictest0-21swapper/021:25:150
35747499391,36cyclictest0-21swapper/020:45:010
35747499391,36cyclictest0-21swapper/019:55:110
35747499391,36cyclictest0-21swapper/000:20:140
35747899389,24cyclictest311ktimers/220:20:272
357478993832,3cyclictest311ktimers/220:40:222
357478993830,4cyclictest167550irq/134-8000000.ethernet-tx223:35:232
357478993829,5cyclictest0-21swapper/220:35:282
357478993828,7cyclictest311ktimers/222:00:142
357478993821,10cyclictest311ktimers/200:00:212
357477993831,4cyclictest0-21swapper/123:45:271
357477993827,6cyclictest0-21swapper/100:00:301
357477993817,11cyclictest231ktimers/121:15:121
357477993817,11cyclictest231ktimers/121:15:121
35747499386,7cyclictest0-21swapper/021:45:230
357474993832,3cyclictest167350irq/118-8000000.ethernet-tx000:05:120
357474993831,4cyclictest0-21swapper/019:45:010
357474993821,15cyclictest200-21pr/ttyS200:00:000
35747499381,3cyclictest395524-21apt-get22:50:110
35747899377,3cyclictest0-21swapper/222:10:012
357478993729,4cyclictest0-21swapper/221:25:282
357478993729,4cyclictest0-21swapper/200:35:282
357478993727,5cyclictest0-21swapper/220:25:272
35747899371,4cyclictest0-21swapper/221:00:012
357478993714,17cyclictest2-21kthreadd21:14:212
357477993729,4cyclictest0-21swapper/119:45:001
357477993726,5cyclictest403928-21grep23:35:281
357477993725,8cyclictest360990-21grep19:25:281
357477993724,11cyclictest231ktimers/121:55:131
357477993724,11cyclictest231ktimers/121:55:131
357477993721,8cyclictest0-21swapper/100:30:211
357477993720,12cyclictest231ktimers/121:05:131
357474993730,4cyclictest20850irq/208-8000000.ethernet00:10:200
357474993730,4cyclictest20850irq/208-8000000.ethernet00:10:190
357474993729,4cyclictest167350irq/118-8000000.ethernet-tx019:50:170
357474993723,10cyclictest0-21swapper/021:35:210
35747499372,2cyclictest390291-21apt-get22:20:150
357478993628,4cyclictest0-21swapper/221:05:002
357478993627,6cyclictest311ktimers/223:30:122
357478993627,6cyclictest311ktimers/223:30:122
357478993626,4cyclictest0-21swapper/221:50:202
357478993622,8cyclictest0-21swapper/223:00:282
357477993628,4cyclictest379009-21munin-plugin-st21:15:001
35747799361,33cyclictest0-21swapper/123:10:001
357474993630,4cyclictest20850irq/208-8000000.ethernet23:10:230
357474993623,11cyclictest131ktimers/022:40:280
35747499362,2cyclictest0-21swapper/023:55:010
35747499361,4cyclictest405087-21apt-get23:45:100
35747499361,33cyclictest0-21swapper/021:20:330
35747499361,2cyclictest0-21swapper/019:10:010
35747899354,29cyclictest30-21rcuc/223:45:262
357478993525,5cyclictest0-21swapper/220:05:282
357478993522,6cyclictest410670-21grep00:15:292
357478993519,9cyclictest0-21swapper/221:20:282
35747899351,28cyclictest0-21swapper/219:45:162
35747899351,27cyclictest0-21swapper/223:17:232
35747899351,27cyclictest0-21swapper/223:17:232
357477993529,3cyclictest364796-21fschecks_count19:50:191
357477993524,7cyclictest387463-21grep22:00:251
35747799351,4cyclictest0-21swapper/120:20:011
357477993514,15cyclictest231ktimers/120:05:131
35747799351,2cyclictest0-21swapper/122:20:001
35747799351,28cyclictest0-21swapper/119:45:161
357478993426,5cyclictest311ktimers/219:50:272
357478993424,6cyclictest311ktimers/223:25:102
357478993421,8cyclictest0-21swapper/220:10:282
357478993418,9cyclictest0-21swapper/200:20:212
357477993429,3cyclictest371323-21latency_hist20:29:591
357477993419,9cyclictest0-21swapper/120:55:271
35747499341,31cyclictest0-21swapper/020:27:330
357478993328,3cyclictest311ktimers/219:20:182
357478993323,6cyclictest386571-21grep21:55:272
357478993323,6cyclictest386571-21grep21:55:272
357477993324,5cyclictest0-21swapper/119:15:211
35747799331,2cyclictest0-21swapper/100:15:011
35747799331,2cyclictest0-21swapper/100:15:011
357478993225,4cyclictest311ktimers/222:55:172
357478993225,3cyclictest311ktimers/222:40:112
357478993224,5cyclictest311ktimers/200:30:192
357478993222,4cyclictest0-21swapper/221:40:232
357478993217,10cyclictest311ktimers/221:10:012
357477993225,5cyclictest0-21swapper/123:15:271
357477993225,5cyclictest0-21swapper/123:15:271
357477993223,5cyclictest0-21swapper/100:25:171
357477993222,7cyclictest0-21swapper/122:25:011
357477993216,3cyclictest0-21swapper/121:55:021
357477993215,11cyclictest380995-21/usr/sbin/munin21:25:191
35747799312,4cyclictest0-21swapper/122:05:211
357477993123,5cyclictest0-21swapper/100:00:011
357477993123,4cyclictest0-21swapper/121:20:261
35747799311,6cyclictest0-21swapper/122:35:021
357478993021,6cyclictest311ktimers/200:25:212
357478993020,5cyclictest0-21swapper/219:15:282
35747899301,23cyclictest0-21swapper/220:01:232
357477993022,5cyclictest384062-21grep21:40:271
357477993017,10cyclictest231ktimers/122:55:131
357477993013,12cyclictest231ktimers/121:35:121
357477992922,4cyclictest0-21swapper/123:30:261
357477992922,4cyclictest0-21swapper/123:30:261
35747799291,2cyclictest0-21swapper/119:30:281
35747799291,2cyclictest0-21swapper/100:10:001
357477992821,5cyclictest0-21swapper/122:45:241
357477992715,7cyclictest0-21swapper/123:40:271
35747799271,2cyclictest0-21swapper/119:40:011
35747799271,2cyclictest0-21swapper/119:40:011
357478992621,3cyclictest311ktimers/219:10:012
357477992616,7cyclictest0-21swapper/122:25:281
35747799242,19cyclictest24-21ksoftirqd/121:30:121
357477992315,5cyclictest0-21swapper/119:10:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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