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2026-03-30 - 19:07

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 all highest latencies:
System rackeslot6s.osadl.org (updated Mon Mar 30, 2026 12:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
76301299110103,4cyclictest131ktimers/009:15:190
763013997510,12cyclictest819341-21apt-get12:40:021
763012996659,2cyclictest0-21swapper/010:50:010
763013996543,18cyclictest770850-21apt07:54:591
763013996524,35cyclictest0-21swapper/110:00:261
763013996516,37cyclictest0-21swapper/110:30:271
76301399639,30cyclictest801720-21/usr/sbin/munin10:55:201
76301899625,12cyclictest30-21rcuc/210:50:022
763012996256,4cyclictest131ktimers/011:55:010
763012996256,4cyclictest131ktimers/011:55:010
76301299621,59cyclictest0-21swapper/009:05:120
76301399611,15cyclictest815322-21apt-get12:15:151
763013996028,28cyclictest1660-21snmpd09:35:221
763018995911,31cyclictest32-21ksoftirqd/212:30:202
763013995935,20cyclictest0-21swapper/108:04:591
763013995824,26cyclictest0-21swapper/111:44:591
763013995823,28cyclictest0-21swapper/108:45:291
763013995816,34cyclictest0-21swapper/111:50:021
763013995743,10cyclictest815122-21munin-plugin-st12:15:001
76301399573,11cyclictest812098-21tune2fs11:55:221
76301399573,11cyclictest812098-21tune2fs11:55:221
763013995728,22cyclictest792054-21sendmail10:00:001
763013995721,29cyclictest0-21swapper/107:30:021
763013995717,4cyclictest0-21swapper/111:00:291
763013995715,36cyclictest0-21swapper/107:15:021
763013995715,36cyclictest0-21swapper/107:15:021
763013995715,31cyclictest0-21swapper/108:20:001
76301399561,13cyclictest798810-21sed10:35:291
76301399556,13cyclictest0-21swapper/109:40:281
76301399556,13cyclictest0-21swapper/109:40:281
76301399552,14cyclictest784804-21tune2fs09:15:191
763013995514,6cyclictest0-21swapper/108:05:241
763013995514,4cyclictest0-21swapper/107:20:201
763013995512,7cyclictest0-21swapper/109:00:271
763013995417,6cyclictest794781-21/usr/sbin/munin10:15:131
76301399541,13cyclictest779289-21grep08:40:271
763018995332,13cyclictest311ktimers/211:30:112
76301399532,31cyclictest776765-21apt-get08:30:011
763013995314,6cyclictest0-21swapper/110:25:291
76301399531,46cyclictest0-21swapper/108:25:191
763012995348,2cyclictest0-21swapper/009:30:010
76301299531,40cyclictest764940-21apt07:20:000
76301299531,40cyclictest764940-21apt07:20:000
76301899525,23cyclictest30-21rcuc/208:45:022
763018995244,4cyclictest790365-21munin-plugin-st09:49:592
76301399525,13cyclictest0-21swapper/110:50:271
763013995219,28cyclictest0-21swapper/108:20:271
76301399521,45cyclictest0-21swapper/111:35:111
763012995238,10cyclictest0-21swapper/008:55:000
76301299521,25cyclictest800590-21apt-get10:50:020
76301399515,11cyclictest0-21swapper/107:45:211
763013995112,5cyclictest0-21swapper/110:05:191
76301399502,12cyclictest800525-21head10:45:271
76301399502,12cyclictest773954-21grep08:10:281
76301399502,12cyclictest773954-21grep08:10:281
76301399501,22cyclictest0-21swapper/111:20:271
763013995011,6cyclictest0-21swapper/110:45:001
763013995011,5cyclictest0-21swapper/107:15:011
76301299501,47cyclictest0-21swapper/012:05:180
76301299501,17cyclictest0-21swapper/012:35:000
763018994940,5cyclictest763814-21munin-plugin-st07:15:012
76301399497,10cyclictest0-21swapper/111:15:281
763013994940,5cyclictest783605-21apt09:10:011
763013994922,23cyclictest763006-21cyclictest07:40:011
763013994922,20cyclictest0-21swapper/111:25:281
763013994914,4cyclictest0-21swapper/111:50:251
763018994832,11cyclictest311ktimers/209:20:162
763012994841,4cyclictest20650irq/252-8000000.ethernet11:10:190
76301899475,16cyclictest32-21ksoftirqd/209:30:022
763018994738,4cyclictest780235-21munin-plugin-st08:50:012
76301399476,8cyclictest781816-21sed08:55:291
76301399476,7cyclictest791155-21grep09:50:281
76301399472,12cyclictest785674-21sh09:20:201
76301399472,12cyclictest769060-21unixbench_multi07:40:281
763013994717,7cyclictest231ktimers/107:55:261
763012994736,8cyclictest788675-21sendmail09:39:590
763012994639,4cyclictest0-21swapper/008:30:020
763012994636,4cyclictest782409-21uname09:00:230
76301299461,43cyclictest0-21swapper/009:30:100
763018994527,13cyclictest311ktimers/211:25:092
76301399452,20cyclictest1660-21snmpd09:30:221
76301399452,13cyclictest767373-21grep07:30:291
76301399452,13cyclictest767373-21grep07:30:291
763013994516,7cyclictest0-21swapper/108:53:021
763013994515,3cyclictest0-21swapper/109:25:201
763018994435,5cyclictest0-21swapper/209:40:002
763018994330,4cyclictest0-21swapper/210:00:182
763018994328,10cyclictest311ktimers/207:30:122
763018994328,10cyclictest311ktimers/207:30:122
763013994331,7cyclictest813342-21grep12:00:291
763013994318,20cyclictest0-21swapper/110:25:011
763013994315,7cyclictest0-21swapper/109:10:281
76301399431,35cyclictest0-21swapper/111:05:221
76301399431,22cyclictest0-21swapper/112:30:271
763012994336,4cyclictest20650irq/252-8000000.ethernet07:40:270
76301299433,4cyclictest775290-21/usr/sbin/munin08:20:210
76301299432,5cyclictest780044-21sendmail_mailqu08:45:270
763018994236,3cyclictest819362-21apt-get12:40:012
763012994234,5cyclictest0-21swapper/012:10:270
76301299421,3cyclictest0-21swapper/008:10:000
76301299421,39cyclictest0-21swapper/007:50:150
763018994132,5cyclictest763006-21cyclictest12:30:012
763018994131,5cyclictest0-21swapper/207:55:302
763018994129,8cyclictest0-21swapper/207:45:282
76301399411,9cyclictest790490-21wc09:50:011
76301299416,12cyclictest15-21rcuc/011:25:020
76301299415,32cyclictest0-21swapper/008:15:260
76301299412,4cyclictest819344-21/usr/sbin/munin12:40:000
76301299412,3cyclictest811689-21sed11:50:310
76301299411,38cyclictest0-21swapper/010:55:290
76301299411,38cyclictest0-21swapper/009:45:160
76301899406,15cyclictest32-21ksoftirqd/211:00:022
763018994032,4cyclictest0-21swapper/212:20:002
763018994031,5cyclictest0-21swapper/211:10:292
763018994027,8cyclictest0-21swapper/210:15:302
763018994023,13cyclictest0-21swapper/211:35:292
763013994012,4cyclictest0-21swapper/111:15:011
763012994033,4cyclictest0-21swapper/012:05:000
763012994025,11cyclictest0-21swapper/009:45:010
763012994025,11cyclictest0-21swapper/009:45:010
763012994025,10cyclictest0-21swapper/011:35:200
763012994023,15cyclictest0-21swapper/008:10:250
763012994023,15cyclictest0-21swapper/008:10:250
76301299401,37cyclictest0-21swapper/011:45:210
763018993925,10cyclictest0-21swapper/209:40:272
763018993925,10cyclictest0-21swapper/209:40:272
76301299393,5cyclictest803103-21grep11:00:270
76301299393,4cyclictest0-21swapper/012:25:010
763012993932,4cyclictest167350irq/118-8000000.ethernet-tx012:25:160
763012993931,5cyclictest0-21swapper/007:10:280
763012993927,8cyclictest0-21swapper/007:25:260
763012993923,14cyclictest0-21swapper/011:30:100
763012993923,14cyclictest0-21swapper/007:20:120
763012993922,15cyclictest0-21swapper/008:35:110
76301299391,3cyclictest781890-21users08:55:300
76301299391,3cyclictest772281-21ps08:00:250
76301299391,36cyclictest0-21swapper/011:05:230
76301299391,36cyclictest0-21swapper/009:20:260
76301299391,35cyclictest792576-21/usr/sbin/munin10:00:230
763018993830,5cyclictest0-21swapper/210:10:292
763018993824,8cyclictest30-21rcuc/209:00:272
763018993821,13cyclictest311ktimers/212:10:142
763018993821,11cyclictest0-21swapper/208:30:012
763018993819,13cyclictest311ktimers/211:00:112
763012993831,4cyclictest0-21swapper/012:15:140
76301299381,4cyclictest792039-21cron10:00:010
76301299381,4cyclictest0-21swapper/007:45:170
763018993726,6cyclictest0-21swapper/210:45:282
763018993724,9cyclictest0-21swapper/212:20:282
763018993723,8cyclictest770828-21sshd07:51:162
763018993721,12cyclictest311ktimers/209:10:122
763018993721,11cyclictest311ktimers/211:40:142
76301899371,31cyclictest770831-1kworker/dying08:22:212
76301399371,7cyclictest0-21swapper/110:15:021
763012993731,4cyclictest0-21swapper/010:37:090
763012993730,4cyclictest0-21swapper/007:34:060
763012993730,4cyclictest0-21swapper/007:34:050
763012993726,7cyclictest0-21swapper/010:20:260
763012993726,6cyclictest0-21swapper/011:15:310
76301299372,32cyclictest797462-21fschecks_time10:30:200
76301299371,34cyclictest0-21swapper/010:15:250
763018993627,5cyclictest808267-21kworker/u8:0-events_power_efficient11:45:292
763012993627,7cyclictest797127-21munin-plugin-st10:30:000
76301299361,6cyclictest0-21swapper/009:55:010
76301299361,33cyclictest0-21swapper/010:40:280
763018993527,4cyclictest0-21swapper/210:05:292
763018993526,6cyclictest805647-21grep11:15:302
763018993526,6cyclictest796198-21grep10:20:272
763018993524,7cyclictest783575-21grep09:05:282
763018993521,9cyclictest0-21swapper/211:05:292
763018993518,10cyclictest0-21swapper/210:30:282
763013993525,7cyclictest777897-21/usr/sbin/munin08:35:151
763013993524,5cyclictest0-21swapper/112:20:261
763012993525,6cyclictest131ktimers/007:35:290
763012993524,8cyclictest0-21swapper/007:55:290
76301299351,3cyclictest0-21swapper/008:40:230
763018993426,6cyclictest0-21swapper/209:20:012
763018993425,6cyclictest798252-21/usr/sbin/munin10:35:232
763018993425,5cyclictest0-21swapper/209:55:182
763018993424,5cyclictest0-21swapper/208:10:302
763018993424,5cyclictest0-21swapper/208:10:292
763013993425,6cyclictest817572-21unixbench_multi12:25:291
763012993426,6cyclictest131ktimers/010:05:280
763012993421,8cyclictest0-21swapper/008:30:210
76301299341,31cyclictest0-21swapper/011:28:230
76301299341,31cyclictest0-21swapper/010:10:180
76301899335,15cyclictest780434-21/usr/sbin/munin08:50:202
763018993328,2cyclictest0-21swapper/207:20:022
763018993327,3cyclictest811699-21grep11:50:322
763018993324,5cyclictest0-21swapper/209:30:272
76301899331,4cyclictest0-21swapper/210:45:002
763013993322,5cyclictest0-21swapper/111:30:251
763012993327,4cyclictest20850irq/208-8000000.ethernet11:40:230
76301299331,30cyclictest0-21swapper/009:13:370
76301899326,14cyclictest32-21ksoftirqd/211:20:172
763018993224,4cyclictest0-21swapper/207:15:272
763018993224,4cyclictest0-21swapper/207:15:272
763018993221,7cyclictest774426-21/usr/sbin/munin08:15:182
763018993213,4cyclictest8321systemd-network08:30:222
763013993220,9cyclictest813637-21/usr/sbin/munin12:05:261
763012993213,6cyclictest746761-1kworker/0:0H+mmc_complete07:10:020
763018993120,8cyclictest0-21swapper/207:35:282
763018993120,7cyclictest0-21swapper/207:25:272
76301899309,4cyclictest832-21systemd-network10:28:262
763018993020,5cyclictest0-21swapper/208:55:192
763018993016,5cyclictest772748-21/usr/sbin/munin08:05:192
76301899301,27cyclictest0-21swapper/208:00:212
763018992918,8cyclictest0-21swapper/211:55:302
763018992918,8cyclictest0-21swapper/211:55:302
763018992918,7cyclictest0-21swapper/212:05:292
76301899287,4cyclictest8321systemd-network07:42:562
763018992820,4cyclictest0-21swapper/209:50:242
763013992818,5cyclictest763133-21latency_hist07:10:011
763018992718,7cyclictest30-21rcuc/212:00:252
76301899265,12cyclictest778425-21grep08:35:282
763018992415,7cyclictest0-21swapper/207:10:002
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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