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2026-04-10 - 15:44

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 Apr 10, 2026 12:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3861267996130,5cyclictest0-21swapper/111:40:361
3861267995144,4cyclictest39517632sleep111:30:101
3861259995040,6cyclictest3899471-21grep08:55:250
3861276994738,6cyclictest3959639-21grep11:50:243
3861259994435,6cyclictest3920368-21grep09:55:250
3861267994332,7cyclictest3966664-21grep12:10:241
3861272994233,6cyclictest0-21swapper/212:05:002
3861267994230,9cyclictest231ktimers/112:05:111
3861276994133,6cyclictest391ktimers/309:00:123
3861267994130,8cyclictest231ktimers/108:25:131
3861267994130,8cyclictest231ktimers/108:25:131
3861259994132,6cyclictest3891413-21sh08:35:000
3861259994132,6cyclictest3891413-21sh08:35:000
3861267994031,5cyclictest3937898-21munin-plugin-st10:50:011
3861276993928,8cyclictest3970933-21cut12:25:173
3861272993933,4cyclictest3887539-21kworker/u8:0+events_unbound08:35:012
3861272993933,4cyclictest3887539-21kworker/u8:0+events_unbound08:35:012
3861272993930,6cyclictest3869855-21unixbench_multi07:30:242
3861272993924,5cyclictest3896346-21kworker/u8:3+events_unbound08:54:152
3861267993930,5cyclictest3868628-21idleruntime-cro07:30:001
3861267993930,5cyclictest0-21swapper/109:40:091
3861259993928,8cyclictest3896126-21grep08:45:260
3861276993822,10cyclictest131rcu_preempt10:04:443
3861272993832,4cyclictest3879068-21sendmail08:00:012
3861272993831,5cyclictest3865213-21munin-plugin-st07:20:002
3861259993830,4cyclictest0-21swapper/009:30:160
386127699373,17cyclictest40-21ksoftirqd/307:35:163
3861276993721,11cyclictest391ktimers/311:25:143
3861272993732,3cyclictest3887539-21kworker/u8:0+events_unbound08:45:032
3861272993728,5cyclictest0-21swapper/210:35:002
3861272993728,5cyclictest0-21swapper/209:20:002
3861272993727,7cyclictest3929819-21fschecks_time10:25:162
3861272993727,7cyclictest3901237-21grep09:00:262
3861267993729,5cyclictest3972221-21munin-plugin-st12:30:011
3861272993629,4cyclictest0-21swapper/209:15:002
3861272993629,4cyclictest0-21swapper/207:15:012
3861272993628,4cyclictest0-21swapper/209:55:152
3861267993627,5cyclictest3871609-21unixbench_singl07:35:261
3861267993625,9cyclictest231ktimers/112:00:111
386125999365,5cyclictest131rcu_preempt09:25:120
3861276993511,14cyclictest40-21ksoftirqd/310:15:093
3861272993529,4cyclictest645-21runrttasks11:30:112
3861272993526,6cyclictest3951133-21unixbench_singl11:25:272
3861272993526,6cyclictest3934912-21fschecks_time10:40:162
3861272993525,6cyclictest0-21swapper/209:40:002
3861272993525,6cyclictest0-21swapper/209:40:002
3861267993528,4cyclictest3923855-21unixbench_singl10:05:241
3861267993527,4cyclictest0-21swapper/108:30:161
3861267993527,4cyclictest0-21swapper/108:30:151
386125999353,5cyclictest131rcu_preempt07:25:130
386127699345,7cyclictest40-21ksoftirqd/308:40:003
3861276993426,4cyclictest0-21swapper/312:35:003
3861276993418,10cyclictest131rcu_preempt11:16:163
3861276993418,10cyclictest131rcu_preempt11:16:153
3861272993418,10cyclictest311ktimers/208:05:122
3861272993417,5cyclictest3920591-21kworker/u8:2+events_unbound10:13:332
3861267993427,4cyclictest0-21swapper/109:05:011
3861259993428,3cyclictest3879092-21kworker/u8:308:00:000
3861259993424,6cyclictest0-21swapper/009:20:070
3861259993418,14cyclictest11-21ksoftirqd/011:25:130
386127699333,8cyclictest40-21ksoftirqd/311:15:003
3861276993323,8cyclictest3875647-21cron07:50:013
3861276993323,6cyclictest0-21swapper/311:30:233
3861272993326,4cyclictest3913568-21kworker/u8:0+events_unbound09:47:382
3861272993326,4cyclictest0-21swapper/211:10:162
3861272993323,6cyclictest0-21swapper/209:10:002
3861267993326,4cyclictest0-21swapper/112:15:241
3861259993326,4cyclictest3922540-21cron10:05:010
3861259993324,6cyclictest3894366-21grep08:40:250
3861259993321,8cyclictest0-21swapper/008:25:270
3861259993321,8cyclictest0-21swapper/008:25:260
3861276993226,4cyclictest3916923-21kworker/u8:3+events_unbound09:54:403
3861276993225,3cyclictest0-21swapper/307:25:173
3861276993224,4cyclictest3916814-21grep09:45:233
3861276993224,4cyclictest0-21swapper/312:20:013
3861276993222,6cyclictest0-21swapper/307:30:233
3861276993218,8cyclictest131rcu_preempt08:10:533
3861276993215,4cyclictest131rcu_preempt08:06:003
3861276993213,8cyclictest3877436-21cut07:55:013
3861276993213,11cyclictest131rcu_preempt10:50:203
386127299327,4cyclictest131rcu_preempt10:55:132
3861272993226,4cyclictest3965200-21kworker/u8:2+events_unbound12:25:472
3861267993225,4cyclictest0-21swapper/107:40:261
3861267993223,6cyclictest0-21swapper/108:50:241
386127699317,8cyclictest3902899-21unixbench_multi09:05:243
386127699317,7cyclictest40-21ksoftirqd/310:05:243
386127699314,7cyclictest40-21ksoftirqd/307:25:023
3861276993125,3cyclictest391ktimers/310:45:323
3861276993124,4cyclictest391ktimers/307:44:143
3861276993123,4cyclictest0-21swapper/310:30:133
3861276993122,5cyclictest3890939-21grep08:30:243
3861276993122,5cyclictest3890939-21grep08:30:243
3861272993124,4cyclictest0-21swapper/210:15:242
3861272993118,4cyclictest3894486-21kworker/u8:1+events_unbound09:00:012
3861272993117,6cyclictest3922449-21kworker/u8:1+events_unbound10:06:312
3861267993122,6cyclictest0-21swapper/112:00:011
3861267993121,7cyclictest3880980-21sh08:05:001
3861267993121,6cyclictest0-21swapper/108:00:001
3861267993120,7cyclictest0-21swapper/110:15:241
3861259993125,3cyclictest0-21swapper/009:00:250
3861259993123,6cyclictest3948042-21kworker/u8:3+events_unbound12:15:460
3861259993121,6cyclictest3885651-21grep08:15:270
386127699305,6cyclictest40-21ksoftirqd/308:55:153
386127699305,6cyclictest40-21ksoftirqd/308:25:263
386127699305,6cyclictest40-21ksoftirqd/308:25:263
386127699304,7cyclictest40-21ksoftirqd/308:20:013
386127699304,7cyclictest40-21ksoftirqd/307:15:043
386127699303,8cyclictest40-21ksoftirqd/312:00:163
3861276993023,3cyclictest0-21swapper/310:55:183
3861276993020,7cyclictest391ktimers/308:00:013
3861276993020,4cyclictest131rcu_preempt09:39:393
3861276993020,4cyclictest131rcu_preempt09:39:393
3861276993015,9cyclictest131rcu_preempt09:16:493
3861276993015,9cyclictest131rcu_preempt09:14:023
386127299307,3cyclictest0-21swapper/211:05:132
3861272993024,3cyclictest3965384-21cron12:10:002
3861272993023,4cyclictest0-21swapper/208:10:262
3861272993015,6cyclictest3910280-21kworker/u8:2+events_unbound09:43:062
3861272993014,5cyclictest3925803-21kworker/u8:3+events_unbound10:46:592
3861267993023,4cyclictest0-21swapper/109:45:141
3861267993022,4cyclictest0-21swapper/109:10:141
3861267993022,3cyclictest0-21swapper/107:15:021
3861267993021,6cyclictest0-21swapper/109:10:021
386126799301,8cyclictest39545132grep11:35:251
3861259993023,4cyclictest0-21swapper/011:25:000
3861259993020,6cyclictest0-21swapper/011:59:590
3861259993017,9cyclictest204-21dbus-daemon10:35:170
386127699297,6cyclictest40-21ksoftirqd/310:40:173
386127699295,7cyclictest40-21ksoftirqd/311:45:243
386127699295,6cyclictest40-21ksoftirqd/309:45:013
386127699294,7cyclictest40-21ksoftirqd/311:35:153
386127699293,6cyclictest40-21ksoftirqd/307:15:013
3861276992921,5cyclictest3966625-21tail12:10:243
3861276992921,4cyclictest0-21swapper/311:05:283
3861276992920,6cyclictest391ktimers/309:31:333
3861276992919,7cyclictest391ktimers/311:05:013
3861276992919,7cyclictest381rcuc/308:46:193
3861276992913,13cyclictest3861253-21cyclictest08:40:113
3861272992923,4cyclictest3873882-21latency_hist07:45:012
3861272992922,4cyclictest3958362-21ls11:50:002
3861272992919,7cyclictest0-21swapper/208:20:002
3861272992917,7cyclictest0-21swapper/210:20:242
3861272992915,6cyclictest3946086-21kworker/u8:0+events_unbound11:50:082
3861272992915,5cyclictest3970428-21kworker/u8:0+events_unbound12:24:182
3861267992920,6cyclictest0-21swapper/110:50:161
3861267992920,5cyclictest0-21swapper/111:00:241
3861259992922,5cyclictest11-21ksoftirqd/010:40:110
3861259992922,4cyclictest0-21swapper/011:10:240
3861259992916,9cyclictest204-21dbus-daemon09:15:080
3861259992914,13cyclictest11-21ksoftirqd/008:00:120
386127699288,6cyclictest40-21ksoftirqd/310:20:153
386127699285,7cyclictest40-21ksoftirqd/308:00:263
386127699285,6cyclictest40-21ksoftirqd/311:20:153
386127699285,5cyclictest40-21ksoftirqd/309:55:013
3861276992822,3cyclictest381rcuc/308:20:353
3861276992821,5cyclictest3946086-21kworker/u8:0+events_unbound11:55:413
3861276992819,6cyclictest391ktimers/309:25:013
3861276992816,6cyclictest131rcu_preempt12:35:323
3861276992810,11cyclictest131rcu_preempt10:36:063
3861272992821,5cyclictest3965200-21kworker/u8:2+events_unbound12:10:462
3861272992821,4cyclictest0-21swapper/209:25:262
3861272992821,4cyclictest0-21swapper/208:20:262
3861272992812,9cyclictest0-21swapper/210:00:452
3861267992821,4cyclictest0-21swapper/110:20:251
3861259992822,4cyclictest3961491-21kworker/u8:1+events_unbound12:00:420
3861259992822,3cyclictest0-21swapper/010:55:270
3861259992821,4cyclictest3915515-21idleruntime-cro09:45:000
3861259992821,4cyclictest0-21swapper/011:00:250
3861259992821,4cyclictest0-21swapper/008:40:000
3861259992820,5cyclictest0-21swapper/010:50:250
386127699274,5cyclictest40-21ksoftirqd/312:10:003
386127699271,6cyclictest0-21swapper/310:25:143
3861276992716,8cyclictest391ktimers/309:25:223
386127699270,8cyclictest40-21ksoftirqd/312:20:163
3861272992722,3cyclictest0-21swapper/207:45:162
3861272992720,5cyclictest0-21swapper/211:19:592
3861272992720,5cyclictest0-21swapper/211:19:592
386127299271,8cyclictest39087012latency_hist09:25:012
3861272992718,7cyclictest3877323-21kworker/u8:1+events_unbound08:25:522
3861272992718,7cyclictest3877323-21kworker/u8:1+events_unbound08:25:512
3861272992714,10cyclictest3861253-21cyclictest08:35:112
3861267992715,8cyclictest1-21systemd10:55:211
3861259992721,3cyclictest0-21swapper/011:50:230
3861259992720,4cyclictest3970094-21unixbench_singl12:20:230
3861259992720,4cyclictest0-21swapper/011:40:000
3861259992718,6cyclictest3873778-21ls07:45:000
3861259992718,6cyclictest0-21swapper/009:55:010
3861259992718,6cyclictest0-21swapper/007:15:010
3861259992717,7cyclictest3883965-21grep08:10:260
3861259992715,8cyclictest204-21dbus-daemon09:45:100
3861259992712,12cyclictest0-21swapper/009:10:010
3861276992617,6cyclictest391ktimers/308:50:163
3861272992620,4cyclictest3875503-21kworker/u8:3+events_unbound07:50:142
3861272992620,4cyclictest3855690-21kworker/u8:0+events_unbound07:38:412
3861272992619,5cyclictest3925803-21kworker/u8:3+events_unbound11:02:422
3861272992619,3cyclictest0-21swapper/209:30:242
3861272992615,8cyclictest204-21dbus-daemon12:35:462
386127299260,13cyclictest3967317-21/usr/sbin/munin12:15:212
386127299260,13cyclictest0-21swapper/207:20:122
3861267992619,5cyclictest3948119-21munin-plugin-st11:20:001
3861267992619,5cyclictest3948119-21munin-plugin-st11:19:591
3861267992618,5cyclictest231ktimers/108:40:101
3861259992620,3cyclictest0-21swapper/007:25:010
3861259992619,4cyclictest0-21swapper/011:05:280
3861272992519,4cyclictest3925803-21kworker/u8:3+events_unbound10:40:012
3861272992519,4cyclictest3885151-21kworker/u8:2+events_unbound08:40:142
3861272992518,5cyclictest3972183-21kworker/u8:1+events_unbound12:31:062
3861272992515,8cyclictest629-21snmpd07:28:002
3861272992511,8cyclictest131rcu_preempt10:55:012
386127299251,12cyclictest0-21swapper/209:50:182
3861272992510,4cyclictest3954572-21kworker/u8:1-events_freezable_power_11:40:172
3861267992517,5cyclictest3909996-21unixbench_singl09:25:261
3861267992516,6cyclictest3870388-21grep07:35:011
3861267992515,7cyclictest3925428-21cat10:10:231
3861259992521,2cyclictest13550irq/42-30be0000.ethernet12:30:170
3861259992521,2cyclictest13550irq/42-30be0000.ethernet12:05:100
3861259992519,4cyclictest3894486-21kworker/u8:1+events_unbound08:50:030
3861259992519,3cyclictest0-21swapper/007:50:270
3861259992518,4cyclictest13550irq/42-30be0000.ethernet08:05:140
3861259992518,3cyclictest0-21swapper/010:10:140
3861259992513,8cyclictest3927646-21sh10:20:000
386125999251,20cyclictest0-21swapper/010:49:380
386125999251,20cyclictest0-21swapper/010:09:340
3861272992418,4cyclictest3956601-21kworker/u8:2+events_unbound11:59:342
3861272992417,5cyclictest3877323-21kworker/u8:1+events_unbound08:02:532
3861272992411,3cyclictest3949370-21unixbench_multi11:20:232
3861267992418,3cyclictest0-21swapper/108:25:001
3861267992417,3cyclictest0-21swapper/112:35:011
3861267992416,4cyclictest0-21swapper/109:50:161
3861267992416,4cyclictest0-21swapper/107:15:251
3861259992420,2cyclictest13550irq/42-30be0000.ethernet11:45:180
3861259992418,4cyclictest3875503-21kworker/u8:3+events_unbound07:49:560
3861259992418,3cyclictest0-21swapper/007:15:220
3861259992417,4cyclictest3948126-21sh11:20:000
3861259992417,4cyclictest3948126-21sh11:20:000
386125999241,21cyclictest0-21swapper/012:26:350
386125999241,21cyclictest0-21swapper/010:32:060
386125999241,19cyclictest0-21swapper/011:31:210
386127299231,5cyclictest3953463-21/usr/sbin/munin11:35:172
3861267992316,5cyclictest0-21swapper/110:40:251
3861267992316,4cyclictest0-21swapper/110:00:251
3861267992315,6cyclictest3913791-21sh09:40:001
3861267992315,6cyclictest3913791-21sh09:40:001
3861267992315,5cyclictest231ktimers/107:50:201
3861259992317,3cyclictest0-21swapper/008:20:210
3861259992316,3cyclictest0-21swapper/012:11:080
386125999230,19cyclictest0-21swapper/010:29:550
3861267992215,4cyclictest3931481-21fschecks_time10:30:131
3861267992215,4cyclictest0-21swapper/107:45:241
3861267992212,7cyclictest3892688-21grep08:35:261
3861267992211,8cyclictest3930095-21wc10:25:201
3861259992216,4cyclictest3899871-21kworker/u8:2+events_unbound09:11:540
3861259992215,5cyclictest0-21swapper/007:35:150
3861259992215,4cyclictest3974325-21fschecks_time12:35:150
386125999220,19cyclictest0-21swapper/010:21:520
386125999220,18cyclictest0-21swapper/011:42:180
386125999220,18cyclictest0-21swapper/007:31:120
3861267992115,3cyclictest0-21swapper/111:45:241
3861267992115,3cyclictest0-21swapper/109:00:001
3861267992114,4cyclictest3908256-21tail09:20:231
3861267992114,4cyclictest0-21swapper/108:10:261
3861267992112,6cyclictest3974243-21ls12:35:131
3861267992112,6cyclictest0-21swapper/111:25:161
3861267992014,4cyclictest3884912-21if_eth008:15:181
3861267992012,5cyclictest0-21swapper/108:45:151
3861267992011,6cyclictest53-21kcompactd010:35:211
3861267991910,6cyclictest3949441-21uptime11:20:231
3861267991810,6cyclictest3945179-21cut11:10:161
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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