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2026-09-04 - 18:49

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #5

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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  Phytec
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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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the highest latencies:
System rackbslot5s.osadl.org (updated Fri Sep 04, 2026 12:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1082820995042,6cyclictest1109238-21kworker/u8:0+events_unbound08:24:501
1082824994738,5cyclictest1100614-21munin-run08:00:002
1082820994726,14cyclictest131rcu_preempt10:00:191
1082820994637,6cyclictest1179459-21unixbench_multi11:45:231
1082820994539,4cyclictest1121351-21kworker/u8:1+events_unbound09:45:011
1082820994538,5cyclictest1107495-21kworker/u8:1+events_unbound08:19:501
1082824994438,4cyclictest1159180-21kworker/u8:1+events_unbound11:05:222
1082820994332,7cyclictest1096767-21grep07:45:251
1082820994328,4cyclictest131rcu_preempt09:57:171
1082820994328,4cyclictest131rcu_preempt09:57:171
1082829994236,3cyclictest0-21swapper/311:20:013
1082829994235,4cyclictest1116392-21cron08:45:003
1082829994233,5cyclictest1104659-21fschecks_time08:10:153
1082829994232,6cyclictest0-21swapper/311:45:003
1082824994228,11cyclictest311ktimers/212:20:142
108282099429,7cyclictest24-21ksoftirqd/107:10:261
1082820994125,4cyclictest131rcu_preempt10:24:451
1082820994124,4cyclictest1098541-21kworker/u8:0-events_freezable_power_08:02:541
1082820994122,5cyclictest131rcu_preempt08:46:131
1082815994132,5cyclictest1143698-21grep10:05:000
1082815994132,5cyclictest0-21swapper/012:35:010
1082829994034,4cyclictest1159180-21kworker/u8:1+events_unbound11:10:233
1082824994034,4cyclictest1153584-21kworker/u8:0+events_unbound11:00:222
1082824994027,8cyclictest0-21swapper/211:30:012
1082820994031,6cyclictest1114688-21grep08:40:001
1082815994031,4cyclictest0-21swapper/011:35:000
1082824993933,4cyclictest1197191-21munin-plugin-st12:40:002
1082820993927,7cyclictest1155350-21grep10:35:251
1082820993921,5cyclictest131rcu_preempt12:15:011
1082815993929,6cyclictest0-21swapper/007:15:000
1082815993928,6cyclictest0-21swapper/011:05:230
1082824993819,6cyclictest1121351-21kworker/u8:1+events_unbound09:30:022
1082820993826,8cyclictest1193362-21grep12:25:261
1082820993826,4cyclictest131rcu_preempt10:45:181
1082820993826,4cyclictest131rcu_preempt10:45:181
1082820993819,5cyclictest131rcu_preempt08:55:241
1082815993818,11cyclictest1121351-21kworker/u8:1+events_unbound09:22:320
1082829993731,4cyclictest1148819-21sendmail10:20:013
1082829993729,5cyclictest1197174-21cron12:40:013
1082829993722,4cyclictest131rcu_preempt12:12:113
1082824993728,6cyclictest0-21swapper/212:15:012
1082824993726,6cyclictest0-21swapper/207:15:242
1082824993719,5cyclictest1111013-21kworker/u8:1+events_unbound08:35:072
1082820993726,6cyclictest1121909-21fschecks_count09:00:151
1082820993726,6cyclictest0-21swapper/112:35:221
1082820993725,8cyclictest1160685-21grep10:50:281
1082820993724,9cyclictest1133444-21cron09:35:011
1082815993728,6cyclictest1158791-21unixbench_multi10:45:230
1082815993728,6cyclictest1158791-21unixbench_multi10:45:230
1082815993727,6cyclictest1179456-21grep11:45:240
1082815993720,11cyclictest1119606-21kworker/u8:0+events_unbound08:56:380
1082829993626,6cyclictest0-21swapper/310:00:263
1082829993626,6cyclictest0-21swapper/307:20:163
1082829993625,7cyclictest0-21swapper/310:25:153
1082829993619,11cyclictest1121351-21kworker/u8:1+events_unbound09:35:213
1082829993616,13cyclictest1084287-21kworker/u8:3+events_unbound07:25:243
1082824993627,6cyclictest0-21swapper/209:05:152
1082824993621,8cyclictest131rcu_preempt10:50:012
1082824993621,8cyclictest131rcu_preempt10:50:012
1082820993630,4cyclictest1090340-21kworker/u8:0+events_unbound07:38:411
1082820993625,7cyclictest1184594-21grep12:00:261
1082820993612,4cyclictest131rcu_preempt07:25:171
1082815993628,4cyclictest0-21swapper/012:40:010
1082815993624,8cyclictest1111059-21cron08:30:010
1082815993621,12cyclictest121ktimers/007:35:100
1082815993619,5cyclictest1123151-21kworker/u8:2+events_unbound09:13:530
1082829993529,4cyclictest1185047-21cron12:05:003
1082829993527,4cyclictest0-21swapper/311:39:593
1082829993526,6cyclictest1181622-21apt11:55:003
1082829993525,6cyclictest0-21swapper/310:50:183
1082829993525,6cyclictest0-21swapper/307:15:243
1082829993525,4cyclictest1116148-21kworker/u8:1+events_unbound08:45:113
1082829993516,5cyclictest1116148-21kworker/u8:1+events_unbound08:51:343
1082824993529,4cyclictest1084287-21kworker/u8:3+events_unbound07:24:402
1082824993527,4cyclictest0-21swapper/208:40:152
1082824993526,6cyclictest0-21swapper/209:40:002
1082824993523,7cyclictest0-21swapper/210:40:252
1082824993518,7cyclictest131rcu_preempt10:23:522
1082824993514,12cyclictest1173021-21kworker/u8:2+events_unbound12:25:192
1082820993529,4cyclictest1166138-21kworker/u8:0+events_unbound11:15:261
1082820993527,4cyclictest0-21swapper/108:25:251
1082820993525,5cyclictest0-21swapper/108:10:161
1082820993511,5cyclictest131rcu_preempt10:40:151
1082815993522,10cyclictest131rcu_preempt08:45:010
1082829993427,3cyclictest0-21swapper/308:00:013
1082829993424,6cyclictest1182859-21grep11:55:263
1082829993424,6cyclictest1182859-21grep11:55:253
1082829993421,9cyclictest391ktimers/309:55:123
1082829993421,9cyclictest391ktimers/309:55:123
1082829993417,5cyclictest131rcu_preempt09:15:013
1082829993417,5cyclictest1121351-21kworker/u8:1+events_unbound09:08:433
1082829993417,10cyclictest1121351-21kworker/u8:1+events_unbound09:31:453
1082824993427,4cyclictest0-21swapper/210:35:002
1082824993424,6cyclictest0-21swapper/212:00:162
1082824993423,7cyclictest0-21swapper/207:30:242
1082824993422,5cyclictest1104681-21kworker/u8:3+events_unbound08:29:502
1082824993419,7cyclictest131rcu_preempt07:35:242
1082820993428,4cyclictest1166138-21kworker/u8:0+events_unbound11:39:411
1082820993423,6cyclictest0-21swapper/112:15:001
1082820993422,8cyclictest1-21systemd11:50:311
1082820993419,9cyclictest1104400-21apt-key08:10:021
1082820993419,9cyclictest1104400-21apt-key08:10:021
1082820993417,4cyclictest0-21swapper/112:09:571
1082820993414,5cyclictest131rcu_preempt08:41:551
1082820993413,5cyclictest131rcu_preempt09:13:001
1082815993424,6cyclictest0-21swapper/011:40:260
1082815993422,6cyclictest1109238-21kworker/u8:0+events_unbound08:23:420
1082829993325,4cyclictest0-21swapper/312:25:393
1082829993325,4cyclictest0-21swapper/311:20:273
1082829993325,4cyclictest0-21swapper/311:00:153
1082829993325,4cyclictest0-21swapper/310:40:163
1082829993325,4cyclictest0-21swapper/309:20:243
1082829993322,6cyclictest0-21swapper/311:00:013
1082829993317,8cyclictest1121351-21kworker/u8:1+events_unbound09:01:393
1082824993326,4cyclictest0-21swapper/211:40:002
1082824993323,6cyclictest0-21swapper/208:15:232
1082824993320,8cyclictest0-21swapper/209:50:272
1082824993316,11cyclictest1104681-21kworker/u8:3+events_unbound08:20:232
1082824993314,7cyclictest131rcu_preempt07:15:012
1082824993313,4cyclictest131rcu_preempt08:30:122
1082824993313,4cyclictest131rcu_preempt08:30:122
1082820993323,7cyclictest1127868-21grep09:15:231
1082820993321,8cyclictest231ktimers/110:20:001
1082820993321,7cyclictest0-21swapper/110:35:011
1082820993316,4cyclictest0-21swapper/111:57:281
1082820993316,4cyclictest0-21swapper/111:57:271
1082820993313,10cyclictest131rcu_preempt09:40:171
1082820993312,5cyclictest131rcu_preempt11:03:581
1082820993310,4cyclictest221rcuc/110:10:551
1082815993327,4cyclictest1188143-21kworker/u8:0+events_unbound12:20:390
1082815993325,4cyclictest0-21swapper/008:15:000
1082815993322,6cyclictest0-21swapper/008:00:260
1082815993320,4cyclictest131rcu_preempt09:05:360
1082829993225,5cyclictest1143355-21kworker/u8:0+events_unbound10:10:093
1082829993223,6cyclictest0-21swapper/307:35:133
1082829993222,6cyclictest0-21swapper/310:05:243
1082829993222,6cyclictest0-21swapper/307:45:163
1082829993214,8cyclictest131rcu_preempt09:50:023
1082824993223,6cyclictest1140641-21fschecks_count09:55:162
1082824993223,6cyclictest1140641-21fschecks_count09:55:162
1082824993218,8cyclictest131rcu_preempt12:16:352
1082824993215,11cyclictest1143355-21kworker/u8:0+events_unbound10:10:302
1082824993214,7cyclictest131rcu_preempt10:25:112
1082824993214,10cyclictest1173021-21kworker/u8:2+events_unbound12:07:202
108282099327,7cyclictest24-21ksoftirqd/109:40:011
108282099323,6cyclictest221rcuc/109:25:011
1082820993224,6cyclictest1153584-21kworker/u8:0+events_unbound10:56:051
1082820993224,4cyclictest0-21swapper/108:50:261
1082820993223,4cyclictest0-21swapper/107:55:131
1082820993215,4cyclictest131rcu_preempt11:43:071
1082820993211,5cyclictest131rcu_preempt07:15:151
1082820993210,4cyclictest131rcu_preempt07:21:091
108281599328,6cyclictest131rcu_preempt09:30:120
1082815993224,4cyclictest0-21swapper/007:40:250
1082815993223,5cyclictest0-21swapper/012:25:260
1082815993221,8cyclictest131rcu_preempt08:50:150
1082815993221,6cyclictest1153461-21grep10:30:230
1082815993218,6cyclictest1119606-21kworker/u8:0+events_unbound09:04:070
1082815993217,5cyclictest1082810-21cyclictest07:20:010
1082815993214,12cyclictest1182432-21kworker/u8:3+events_unbound11:55:460
1082815993214,12cyclictest1182432-21kworker/u8:3+events_unbound11:55:460
108282999319,6cyclictest131rcu_preempt11:05:203
1082829993115,7cyclictest1121351-21kworker/u8:1+events_unbound09:19:163
1082824993125,3cyclictest1095506-21sh07:45:012
1082824993123,4cyclictest0-21swapper/210:35:162
108282499311,16cyclictest1127195-21/usr/sbin/munin09:15:162
108282099318,17cyclictest24-21ksoftirqd/111:20:261
1082820993122,6cyclictest0-21swapper/111:10:011
1082820993117,4cyclictest131rcu_preempt07:40:451
1082820993115,4cyclictest131rcu_preempt11:30:581
1082820993113,5cyclictest131rcu_preempt10:25:211
1082820993113,4cyclictest131rcu_preempt07:30:161
1082820993110,4cyclictest131rcu_preempt09:27:241
1082820993110,4cyclictest131rcu_preempt08:31:091
1082820993110,4cyclictest131rcu_preempt08:31:091
1082815993125,4cyclictest1146871-21kworker/u8:1+events_unbound10:42:400
1082815993125,3cyclictest0-21swapper/011:00:010
1082815993117,6cyclictest1145152-21kworker/u8:2+events_unbound10:11:370
108282999308,15cyclictest40-21ksoftirqd/308:20:213
1082829993024,4cyclictest1107668-21sendmail08:20:013
1082829993023,4cyclictest0-21swapper/310:40:003
1082829993022,4cyclictest0-21swapper/308:30:253
1082829993022,4cyclictest0-21swapper/308:30:253
1082829993017,5cyclictest1119606-21kworker/u8:0+events_unbound08:55:153
1082829993016,5cyclictest1137550-21meminfo09:45:183
1082829993015,4cyclictest0-21swapper/308:25:253
1082829993014,9cyclictest131rcu_preempt10:31:423
1082829993010,6cyclictest131rcu_preempt10:45:113
1082829993010,6cyclictest131rcu_preempt10:45:113
1082824993023,5cyclictest1121351-21kworker/u8:1+events_unbound09:45:112
1082824993022,4cyclictest0-21swapper/209:00:232
1082824993021,6cyclictest0-21swapper/210:04:592
1082824993020,6cyclictest0-21swapper/211:30:292
1082824993019,7cyclictest1129646-21grep09:20:252
1082824993018,6cyclictest1100254-21kworker/u8:2+events_unbound08:05:202
1082824993018,6cyclictest1100254-21kworker/u8:2+events_unbound08:05:202
1082824993018,4cyclictest131rcu_preempt11:10:212
1082820993022,4cyclictest131rcu_preempt07:53:431
1082820993016,10cyclictest131rcu_preempt11:14:531
1082820993015,4cyclictest131rcu_preempt12:21:401
1082820993015,4cyclictest0-21swapper/109:54:561
1082820993015,3cyclictest131rcu_preempt11:25:191
1082820993013,5cyclictest131rcu_preempt12:30:161
108281599308,4cyclictest0-21swapper/011:35:200
108281599307,11cyclictest11-21ksoftirqd/011:10:150
1082815993025,3cyclictest13550irq/42-30be0000.ethernet08:05:140
1082815993025,3cyclictest13550irq/42-30be0000.ethernet08:05:140
1082815993023,3cyclictest0-21swapper/011:20:260
1082815993019,6cyclictest0-21swapper/011:15:220
1082815993018,4cyclictest131rcu_preempt07:54:250
1082815993017,5cyclictest1178085-21kworker/u8:1+events_unbound11:50:020
1082815993012,4cyclictest0-21swapper/007:25:120
108282999297,4cyclictest40-21ksoftirqd/312:35:013
1082829992921,4cyclictest0-21swapper/308:00:173
1082829992917,4cyclictest131rcu_preempt12:20:093
1082829992916,5cyclictest1173021-21kworker/u8:2+events_unbound12:05:113
1082829992913,10cyclictest131rcu_preempt07:10:243
1082829992911,4cyclictest0-21swapper/309:40:243
108282499297,4cyclictest131rcu_preempt08:55:292
1082824992921,4cyclictest0-21swapper/210:15:272
1082824992919,6cyclictest0-21swapper/209:10:252
1082824992919,4cyclictest131rcu_preempt08:10:162
1082824992913,8cyclictest131rcu_preempt08:02:152
1082824992912,9cyclictest32-21ksoftirqd/211:41:532
108282099296,5cyclictest231ktimers/110:05:231
108281599298,14cyclictest11-21ksoftirqd/009:15:180
108281599297,4cyclictest11-21ksoftirqd/010:30:010
108281599295,18cyclictest0-21swapper/009:35:220
1082815992925,2cyclictest13550irq/42-30be0000.ethernet09:50:270
1082815992919,6cyclictest0-21swapper/008:45:250
1082815992912,10cyclictest1104681-21kworker/u8:3+events_unbound08:34:060
1082815992912,10cyclictest1104681-21kworker/u8:3+events_unbound08:34:050
1082815992911,12cyclictest0-21swapper/008:20:010
108282999288,12cyclictest131rcu_preempt11:30:283
108282999287,14cyclictest40-21ksoftirqd/307:42:493
1082829992816,4cyclictest131rcu_preempt12:20:013
1082829992810,12cyclictest0-21swapper/311:45:123
108282499287,9cyclictest32-21ksoftirqd/207:27:552
108282499287,4cyclictest131rcu_preempt07:50:112
108282499286,18cyclictest311ktimers/210:05:222
108282499285,11cyclictest131rcu_preempt12:30:152
1082824992816,6cyclictest1131392-21kworker/u8:2+events_unbound09:29:212
1082824992815,7cyclictest131rcu_preempt08:52:042
1082824992812,9cyclictest131rcu_preempt11:20:202
1082824992810,12cyclictest0-21swapper/209:40:142
1082820992817,8cyclictest231ktimers/109:05:161
108281599288,3cyclictest131rcu_preempt10:05:110
108281599288,10cyclictest131rcu_preempt12:10:170
108281599287,10cyclictest11-21ksoftirqd/010:35:160
108281599285,20cyclictest0-21swapper/007:20:150
1082815992821,5cyclictest1149264-21kworker/u8:0+events_unbound10:21:410
1082815992821,3cyclictest0-21swapper/010:50:290
1082815992821,3cyclictest0-21swapper/008:35:270
108281599281,5cyclictest1148787-21cron10:20:000
1082815992811,4cyclictest0-21swapper/012:05:010
108282999278,13cyclictest0-21swapper/310:20:153
108282999272,18cyclictest0-21swapper/309:25:183
1082829992714,4cyclictest0-21swapper/308:05:123
1082829992714,4cyclictest0-21swapper/308:05:113
1082829992710,10cyclictest0-21swapper/307:30:123
1082824992722,3cyclictest1082810-21cyclictest10:55:142
1082824992719,4cyclictest0-21swapper/208:45:162
1082824992717,3cyclictest131rcu_preempt11:15:152
108282499271,6cyclictest0-21swapper/211:55:142
108282499271,6cyclictest0-21swapper/211:55:142
1082815992719,4cyclictest1121351-21kworker/u8:1+events_unbound09:29:580
1082815992718,5cyclictest208-21systemd-logind09:45:010
1082815992714,5cyclictest1088405-21kworker/u8:1+events_unbound07:32:120
1082815992713,4cyclictest1188810-21apt-config12:15:010
1082815992712,5cyclictest131rcu_preempt12:05:230
108281599271,17cyclictest0-21swapper/007:56:000
108282999267,11cyclictest1171801-21fschecks_count11:25:153
108282999260,15cyclictest0-21swapper/307:52:043
1082824992617,6cyclictest0-21swapper/211:45:232
1082824992614,9cyclictest32-21ksoftirqd/211:50:262
1082824992612,9cyclictest131rcu_preempt10:50:572
1082824992610,7cyclictest131rcu_preempt07:45:122
108281599261,18cyclictest0-21swapper/011:00:160
108281599261,16cyclictest0-21swapper/009:57:310
108281599261,16cyclictest0-21swapper/009:57:300
1082815992610,8cyclictest131rcu_preempt11:29:410
108282999251,14cyclictest1113659-21meminfo08:35:213
1082815992516,5cyclictest0-21swapper/009:45:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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