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2026-04-20 - 07:33

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 Mon Apr 20, 2026 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
212756399903,68cyclictest0-21swapper/121:25:001
212756399824,72cyclictest2164561-21/usr/sbin/munin22:45:181
212756399811,42cyclictest0-21swapper/121:20:011
212756399811,42cyclictest0-21swapper/121:20:011
212756399761,46cyclictest0-21swapper/122:05:011
212756399741,36cyclictest0-21swapper/100:20:021
212756399691,56cyclictest0-21swapper/100:25:151
212756399691,56cyclictest0-21swapper/100:25:151
212756399685,57cyclictest2156968-21/usr/sbin/munin22:00:191
212756399681,52cyclictest0-21swapper/120:30:151
212756399671,37cyclictest0-21swapper/120:05:011
212756399661,51cyclictest0-21swapper/100:05:151
2127563996516,38cyclictest0-21swapper/120:20:301
212756399651,51cyclictest0-21swapper/123:20:131
212756399641,52cyclictest0-21swapper/123:50:141
212756399641,51cyclictest0-21swapper/119:35:121
212756399631,49cyclictest0-21swapper/123:35:151
212756399631,49cyclictest0-21swapper/121:00:151
212756399631,48cyclictest0-21swapper/121:55:131
2127563996220,37cyclictest0-21swapper/119:40:281
212756399621,49cyclictest0-21swapper/122:30:141
212756399621,49cyclictest0-21swapper/122:30:141
212756399621,46cyclictest0-21swapper/122:35:121
212756699611,25cyclictest0-21swapper/222:05:002
2127563996125,32cyclictest2159214-21unixbench_singl22:10:281
2127563996125,32cyclictest2154042-21sendmail_mailqu21:40:281
2127563996120,32cyclictest0-21swapper/119:10:011
212756399611,50cyclictest0-21swapper/100:20:131
2127559996145,11cyclictest0-21swapper/019:10:010
2127566996053,4cyclictest311ktimers/222:35:012
2127566996053,4cyclictest311ktimers/222:35:002
212756399601,53cyclictest2174678-21latency_hist23:45:011
212756399601,49cyclictest0-21swapper/120:50:131
212756399601,49cyclictest0-21swapper/120:50:121
212756399601,47cyclictest0-21swapper/123:45:131
212756399601,47cyclictest0-21swapper/123:45:131
212756399601,47cyclictest0-21swapper/119:15:131
212756399601,47cyclictest0-21swapper/119:15:131
212756399591,47cyclictest0-21swapper/120:05:141
212756399591,45cyclictest0-21swapper/120:55:161
212756399591,45cyclictest0-21swapper/119:55:141
2127566995837,11cyclictest30-21rcuc/220:30:012
2127566995837,11cyclictest30-21rcuc/220:30:002
212756399584,46cyclictest2170146-21unixbench_multi23:15:281
212756399581,48cyclictest2141252-21/usr/sbin/munin20:25:291
212756399581,48cyclictest2141252-21/usr/sbin/munin20:25:291
212756399581,45cyclictest0-21swapper/120:45:141
212756399581,32cyclictest0-21swapper/121:10:021
212756399572,46cyclictest2171319-21apt-get23:25:151
212756399561,52cyclictest0-21swapper/100:00:011
212756399561,47cyclictest2177803-21/usr/sbin/munin00:00:301
212756399561,44cyclictest0-21swapper/120:35:141
212756399553,43cyclictest2138526-21/usr/sbin/munin20:10:261
212756399551,47cyclictest2160859-21/usr/sbin/munin22:20:301
212756399551,46cyclictest2163725-21apt-get22:40:141
212756399551,46cyclictest2148432-21apt-get21:10:151
212756399551,46cyclictest2131869-21/usr/sbin/munin19:30:291
212756399551,46cyclictest2131869-21/usr/sbin/munin19:30:291
2127563995510,34cyclictest0-21swapper/123:10:011
2127563995510,34cyclictest0-21swapper/123:10:011
212756399542,44cyclictest2165398-21/usr/sbin/munin22:50:291
2127563995420,26cyclictest2134582-21grep19:45:281
212756399541,46cyclictest2179349-21/usr/sbin/munin00:10:251
212756399541,46cyclictest2143894-21/usr/sbin/munin20:40:281
212756399541,45cyclictest2169258-21/usr/sbin/munin23:10:281
212756399541,45cyclictest2166560-21/usr/sbin/munin22:55:261
212756399541,45cyclictest2130827-21/usr/sbin/munin19:25:231
212756399541,45cyclictest2130283-21/usr/sbin/munin19:20:281
212756399532,43cyclictest2167452-21/usr/sbin/munin23:00:271
212756399532,43cyclictest2154685-21/usr/sbin/munin21:45:231
212756399532,43cyclictest2134898-21/usr/sbin/munin19:50:191
212756399531,46cyclictest2161478-21/usr/sbin/munin22:25:241
212756399531,45cyclictest2172228-21diskstats23:30:171
212756399531,45cyclictest0-21swapper/121:36:221
212756399531,44cyclictest2155474-21/usr/sbin/munin21:50:221
212756399531,44cyclictest2151809-21apt-get21:30:131
212756399531,44cyclictest2151809-21apt-get21:30:121
212756399531,41cyclictest0-21swapper/120:15:141
2127559995342,5cyclictest2150733-21grep21:20:300
2127559995313,11cyclictest2145767-21gpgconf20:55:010
2127559995313,11cyclictest2145767-21gpgconf20:55:000
212756399522,43cyclictest2183339-21/usr/sbin/munin00:35:221
212756399522,43cyclictest2183339-21/usr/sbin/munin00:35:221
212756399521,42cyclictest2128080-21/usr/sbin/munin19:10:241
2127559995214,36cyclictest131ktimers/022:45:150
2127566995144,4cyclictest2127494-21latency_hist19:10:002
212756399511,44cyclictest2159558-21/usr/sbin/munin22:15:191
212756399511,44cyclictest2159558-21/usr/sbin/munin22:15:181
212755999518,8cyclictest2128552-21basename19:15:010
212756399501,46cyclictest2151050-21/usr/sbin/munin21:25:191
212756399501,41cyclictest2182378-21apt-get00:30:151
2127559994942,4cyclictest2158450-21munin-plugin-st22:10:010
2127559994941,5cyclictest0-21swapper/022:30:000
212755999492,40cyclictest2175518-21latency_hist23:50:010
212755999492,40cyclictest2175518-21latency_hist23:50:010
212755999491,4cyclictest0-21swapper/021:10:020
2127566994833,11cyclictest311ktimers/219:30:162
2127566994833,11cyclictest311ktimers/219:30:162
2127559994841,4cyclictest167350irq/118-8000000.ethernet-tx021:00:180
2127559994831,12cyclictest131ktimers/020:35:170
2127559994811,8cyclictest2174493-21apt-get23:45:000
2127559994740,3cyclictest0-21swapper/022:50:300
212755999471,44cyclictest0-21swapper/019:25:210
2127566994534,7cyclictest0-21swapper/220:05:012
212756699453,28cyclictest32-21ksoftirqd/200:40:012
212756699453,28cyclictest32-21ksoftirqd/200:40:002
212755999455,2cyclictest0-21swapper/000:05:010
2127559994437,4cyclictest167350irq/118-8000000.ethernet-tx023:00:250
2127559994436,4cyclictest167350irq/118-8000000.ethernet-tx021:15:240
2127559994436,4cyclictest167350irq/118-8000000.ethernet-tx021:15:240
212755999443,5cyclictest2168474-21grep23:05:290
212755999443,5cyclictest2168474-21grep23:05:290
212755999442,37cyclictest2176207-21sed23:50:290
2127559994327,13cyclictest0-21swapper/019:30:140
2127559994327,13cyclictest0-21swapper/019:30:140
212755999432,5cyclictest2163900-21perl22:40:230
212755999431,40cyclictest0-21swapper/021:40:040
2127566994231,6cyclictest0-21swapper/221:30:212
2127566994231,6cyclictest0-21swapper/221:30:212
2127566994214,11cyclictest2144962-21/usr/sbin/munin20:50:202
2127566994214,11cyclictest2144962-21/usr/sbin/munin20:50:202
2127559994236,3cyclictest167350irq/118-8000000.ethernet-tx020:00:180
212755999422,17cyclictest15-21rcuc/019:25:010
212755999421,39cyclictest0-21swapper/022:40:000
212755999421,39cyclictest0-21swapper/021:45:250
212755999421,36cyclictest0-21swapper/020:30:020
2127566994132,5cyclictest0-21swapper/219:35:282
2127559994132,4cyclictest0-21swapper/020:05:290
2127559994124,15cyclictest0-21swapper/020:15:290
2127559994124,11cyclictest0-21swapper/023:25:210
212755999411,38cyclictest0-21swapper/019:20:010
212755999411,38cyclictest0-21swapper/019:20:010
2127566994031,5cyclictest2177112-21sendmail23:59:592
2127566994029,6cyclictest2130356-21grep19:20:292
2127559994034,4cyclictest0-21swapper/023:20:140
2127559994026,10cyclictest0-21swapper/019:35:250
212755999402,3cyclictest2172208-21awk23:30:150
212755999401,37cyclictest0-21swapper/020:25:260
212755999401,37cyclictest0-21swapper/020:25:260
212755999401,37cyclictest0-21swapper/019:40:210
212755999401,36cyclictest2180032-21lsblk00:15:220
2127566993929,6cyclictest0-21swapper/222:10:012
212755999394,4cyclictest2183871-21apt-get00:40:010
212755999394,4cyclictest2183871-21apt-get00:40:010
2127559993934,3cyclictest167350irq/118-8000000.ethernet-tx021:10:200
2127559993932,4cyclictest0-21swapper/021:30:140
2127559993932,4cyclictest0-21swapper/021:30:130
2127559993931,5cyclictest20850irq/208-8000000.ethernet21:40:000
2127559993931,4cyclictest0-21swapper/021:55:020
212755999391,3cyclictest2135737-21diskstats19:55:210
212755999391,36cyclictest2173062-21/usr/sbin/munin23:35:170
212755999391,36cyclictest0-21swapper/019:50:180
212755999391,33cyclictest0-21swapper/023:00:000
2127566993832,4cyclictest311ktimers/221:55:002
2127566993823,10cyclictest0-21swapper/219:15:282
2127566993823,10cyclictest0-21swapper/219:15:282
2127566993821,11cyclictest0-21swapper/220:50:012
2127566993821,10cyclictest0-21swapper/220:55:222
2127559993830,5cyclictest0-21swapper/000:25:190
2127559993830,5cyclictest0-21swapper/000:25:180
2127559993822,14cyclictest0-21swapper/000:20:200
212755999381,4cyclictest0-21swapper/022:00:120
212755999381,4cyclictest0-21swapper/020:55:260
212755999381,35cyclictest0-21swapper/023:15:130
212755999381,35cyclictest0-21swapper/023:10:250
212755999381,33cyclictest0-21swapper/000:30:020
2127566993724,7cyclictest0-21swapper/223:35:292
2127566993719,12cyclictest30-21rcuc/220:05:212
212756699371,6cyclictest0-21swapper/220:15:012
2127559993731,4cyclictest0-21swapper/000:05:140
2127559993730,4cyclictest20850irq/208-8000000.ethernet19:45:240
2127559993730,4cyclictest0-21swapper/020:43:160
2127559993727,6cyclictest2160922-21grep22:20:290
212755999371,34cyclictest0-21swapper/020:10:130
212755999371,34cyclictest0-21swapper/000:10:200
2127566993624,6cyclictest2181535-21/usr/sbin/munin00:25:252
2127566993624,6cyclictest2181535-21/usr/sbin/munin00:25:252
2127559993629,4cyclictest20850irq/208-8000000.ethernet20:20:210
2127559993619,12cyclictest20850irq/208-8000000.ethernet20:45:160
212755999361,3cyclictest0-21swapper/022:15:270
212755999361,3cyclictest0-21swapper/022:15:260
212755999361,33cyclictest0-21swapper/021:55:190
212756699356,12cyclictest2167938-21/usr/sbin/munin23:05:202
212756699356,12cyclictest2167938-21/usr/sbin/munin23:05:202
2127566993526,5cyclictest0-21swapper/220:20:012
2127566993526,5cyclictest0-21swapper/219:54:592
2127566993525,6cyclictest2160043-21grep22:15:282
2127566993525,6cyclictest2160043-21grep22:15:282
2127566993524,6cyclictest0-21swapper/221:40:292
212756699351,3cyclictest0-21swapper/222:55:012
212756699351,28cyclictest0-21swapper/221:20:172
2127566993426,5cyclictest0-21swapper/223:40:272
212756699341,3cyclictest0-21swapper/220:35:002
212756699341,26cyclictest2161184-21/usr/sbin/munin22:25:172
2127559993425,5cyclictest0-21swapper/023:55:260
2127559993420,11cyclictest0-21swapper/022:10:290
2127566993320,9cyclictest0-21swapper/221:55:292
2127566993320,5cyclictest0-21swapper/200:35:012
2127566993318,10cyclictest311ktimers/222:20:162
212756699331,3cyclictest0-21swapper/200:05:012
212756699331,27cyclictest0-21swapper/220:35:482
2127559993326,4cyclictest20650irq/252-8000000.ethernet21:25:310
2127566993224,4cyclictest0-21swapper/223:00:212
2127566993222,6cyclictest0-21swapper/221:15:272
2127566993222,6cyclictest0-21swapper/221:15:272
2127566993211,5cyclictest832-21systemd-network00:10:222
2127566993123,5cyclictest2128327-21grep19:10:272
2127566993123,4cyclictest0-21swapper/223:30:262
2127566993123,4cyclictest0-21swapper/222:55:282
2127566993122,6cyclictest2180477-21sh00:20:012
2127566993122,5cyclictest0-21swapper/223:50:292
2127566993121,7cyclictest2165012-21sendmail_mailqu22:45:292
2127566993121,5cyclictest0-21swapper/221:45:272
2127566993119,8cyclictest311ktimers/219:40:112
212755999311,2cyclictest0-21swapper/022:30:240
212755999311,2cyclictest0-21swapper/022:30:240
2127566993025,3cyclictest0-21swapper/200:20:172
2127566993023,4cyclictest0-21swapper/223:10:282
2127566993022,6cyclictest311ktimers/222:10:182
2127566993020,7cyclictest0-21swapper/220:20:302
2127566993019,8cyclictest0-21swapper/220:40:282
2127566993019,7cyclictest0-21swapper/221:00:212
2127566993014,5cyclictest167550irq/134-8000000.ethernet-tx219:57:222
212756699301,27cyclictest0-21swapper/223:25:262
212756699301,23cyclictest0-21swapper/200:05:172
2127566992922,5cyclictest0-21swapper/222:40:232
2127566992920,6cyclictest0-21swapper/221:25:302
212756699291,2cyclictest0-21swapper/223:25:012
212756699291,26cyclictest0-21swapper/223:15:222
2127566992824,3cyclictest0-21swapper/219:25:182
2127566992818,6cyclictest30-21rcuc/219:45:242
212756699281,25cyclictest0-21swapper/223:45:282
212756699281,25cyclictest0-21swapper/223:45:282
2127566992716,8cyclictest0-21swapper/221:10:272
2127566992716,7cyclictest0-21swapper/221:40:012
212756699271,24cyclictest0-21swapper/221:05:442
2127566992617,6cyclictest0-21swapper/222:35:182
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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