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2026-09-12 - 01:19

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 11, 2026 12:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2974228994942,5cyclictest3064774-21kworker/u8:2+events_unbound11:44:282
2974228994637,4cyclictest3052800-21munin-plugin-st10:55:012
2974228994636,6cyclictest2992021-21grep08:00:012
2974223994637,6cyclictest3059994-21tune2fs11:15:151
2974223994637,6cyclictest2993257-21grep08:00:241
2974223994637,6cyclictest2993257-21grep08:00:241
2974223994538,4cyclictest3048938-21unixbench_multi10:40:241
2974219994536,6cyclictest2991598-21unixbench_singl07:55:260
2974223994437,5cyclictest3064470-21unixbench_multi11:25:241
2974219994419,8cyclictest131rcu_preempt08:10:110
2974223994134,4cyclictest3075379-21latency_hist11:59:591
2974219994133,5cyclictest3052783-21sh10:55:000
2974219994130,6cyclictest3060887-21grep11:15:240
2974228994034,4cyclictest3032172-21apt-config09:55:002
2974223994033,4cyclictest0-21swapper/110:20:001
2974223994032,5cyclictest3042570-21idleruntime-cro10:24:591
2974219994030,7cyclictest3054499-21cat11:00:000
2974219994030,7cyclictest2993264-21grep08:00:240
2974219994030,7cyclictest2993264-21grep08:00:240
2974219994030,6cyclictest3021414-21grep09:20:250
2974228993930,6cyclictest3059996-21fschecks_count11:15:152
2974228993929,6cyclictest0-21swapper/208:50:242
2974228993927,8cyclictest3051089-21apt10:50:012
2974223993929,7cyclictest2991595-21grep07:55:261
2974231993829,4cyclictest0-21swapper/309:30:183
2974219993828,7cyclictest3005238-21grep08:35:260
2974231993730,3cyclictest3030396-21cron09:50:003
2974231993729,4cyclictest3065563-21sshd11:30:243
2974228993730,4cyclictest3089242-21latency_hist12:40:012
2974223993729,6cyclictest3055801-21unixbench_singl11:00:261
2974223993729,5cyclictest3020165-21sendmail09:20:011
2974223993727,6cyclictest0-21swapper/112:30:001
2974219993727,7cyclictest3020165-21sendmail09:20:010
2974231993629,3cyclictest0-21swapper/312:24:313
2974231993628,5cyclictest3007582-21cron08:45:013
2974231993627,5cyclictest3070266-21cron11:44:593
2974231993627,4cyclictest0-21swapper/311:10:013
2974231993626,5cyclictest0-21swapper/312:00:003
2974228993630,3cyclictest0-21swapper/210:40:252
2974228993629,3cyclictest0-21swapper/208:50:012
2974228993628,4cyclictest0-21swapper/207:35:172
2974223993625,7cyclictest0-21swapper/108:05:251
2974219993626,6cyclictest208-21systemd-logind08:18:440
2974231993526,6cyclictest3014845-21munin-plugin-st09:05:013
2974228993527,5cyclictest0-21swapper/210:39:592
2974228993526,4cyclictest0-21swapper/210:55:162
2974223993528,5cyclictest3051055-21kworker/u8:2+events_unbound11:09:231
2974223993525,6cyclictest0-21swapper/109:20:251
2974231993426,4cyclictest0-21swapper/311:15:243
2974231993425,7cyclictest3024926-21kworker/u8:1+events_unbound09:44:063
2974231993425,7cyclictest3024926-21kworker/u8:1+events_unbound09:44:053
2974228993426,5cyclictest0-21swapper/210:20:002
2974228993426,4cyclictest0-21swapper/210:30:162
2974228993426,4cyclictest0-21swapper/210:30:162
2974228993424,6cyclictest0-21swapper/208:10:252
2974228993423,7cyclictest0-21swapper/207:45:242
2974223993427,4cyclictest2998845-21munin-run08:20:011
2974223993425,5cyclictest0-21swapper/108:25:251
2974223993424,7cyclictest3000102-21grep08:20:261
2974219993426,4cyclictest0-21swapper/010:10:300
2974219993425,5cyclictest0-21swapper/008:08:430
2974219993424,6cyclictest0-21swapper/010:45:240
2974219993424,6cyclictest0-21swapper/007:40:250
2974219993423,6cyclictest0-21swapper/012:10:300
2974231993324,7cyclictest3034271-21kworker/u8:2+events_unbound10:04:103
2974231993324,4cyclictest0-21swapper/308:13:443
2974228993325,4cyclictest0-21swapper/208:20:262
2974228993324,5cyclictest0-21swapper/207:10:252
2974223993324,5cyclictest0-21swapper/111:50:251
2974219993324,6cyclictest151rcuc/010:25:110
2974219993323,5cyclictest0-21swapper/007:15:250
2974228993225,5cyclictest0-21swapper/212:00:002
2974228993225,4cyclictest0-21swapper/211:35:002
2974228993225,3cyclictest0-21swapper/208:05:002
2974228993225,3cyclictest0-21swapper/208:05:002
2974223993225,4cyclictest0-21swapper/110:50:261
2974223993225,4cyclictest0-21swapper/109:08:511
2974223993224,4cyclictest0-21swapper/109:40:001
2974223993222,6cyclictest0-21swapper/111:40:011
2974223993221,7cyclictest0-21swapper/112:00:251
2974219993226,3cyclictest0-21swapper/008:30:260
297421999322,5cyclictest3064480-21tail11:25:240
2974219993222,7cyclictest3077090-21sh12:04:590
2974231993122,4cyclictest0-21swapper/311:25:153
2974231993121,7cyclictest0-21swapper/312:20:013
2974231993120,6cyclictest0-21swapper/308:08:433
2974228993125,4cyclictest3005308-21kworker/u8:0+events_unbound09:05:162
2974228993125,3cyclictest2981583-21kthreadd07:30:012
2974228993123,4cyclictest0-21swapper/208:05:262
2974228993122,6cyclictest0-21swapper/211:15:012
2974223993122,6cyclictest0-21swapper/107:40:001
2974223993122,5cyclictest0-21swapper/109:59:091
2974219993121,6cyclictest0-21swapper/011:00:260
2974219993120,8cyclictest0-21swapper/009:30:000
2974219993120,6cyclictest0-21swapper/012:20:010
2974231993024,3cyclictest2978177-21sendmail07:20:003
2974231993023,4cyclictest3084742-21runrttasks12:25:173
2974231993021,6cyclictest3071570-21unixbench_singl11:45:233
2974231993021,6cyclictest2983889-21fschecks_count07:35:173
2974231993021,6cyclictest2978570-21fschecks_count07:20:163
2974231993020,6cyclictest0-21swapper/309:40:003
2974231993020,6cyclictest0-21swapper/308:05:013
2974231993020,6cyclictest0-21swapper/308:05:013
2974228993023,4cyclictest0-21swapper/211:00:262
2974228993023,3cyclictest0-21swapper/212:10:302
2974228993022,5cyclictest0-21swapper/209:05:012
2974228993022,5cyclictest0-21swapper/209:00:002
2974228993022,4cyclictest0-21swapper/207:18:352
2974228993021,6cyclictest0-21swapper/210:30:002
2974228993010,8cyclictest3017787-21switchtime09:10:242
2974223993021,6cyclictest0-21swapper/110:40:001
2974223993020,6cyclictest0-21swapper/111:20:251
2974223993020,6cyclictest0-21swapper/111:20:251
2974223993018,9cyclictest231ktimers/110:10:171
2974219993024,3cyclictest0-21swapper/008:50:000
2974219993023,4cyclictest0-21swapper/011:55:240
2974231992923,4cyclictest3034271-21kworker/u8:2+events_unbound10:09:093
2974231992921,4cyclictest0-21swapper/310:40:163
2974231992920,6cyclictest0-21swapper/308:40:013
2974228992921,5cyclictest0-21swapper/210:00:012
2974228992921,4cyclictest0-21swapper/207:50:242
2974228992920,5cyclictest0-21swapper/210:05:152
2974228992919,6cyclictest3003953-21sh08:35:012
2974223992924,3cyclictest3049345-21kworker/u8:0+events_unbound10:49:181
2974223992921,4cyclictest0-21swapper/112:10:301
2974223992920,6cyclictest0-21swapper/107:15:001
2974219992920,5cyclictest3023969-21grep09:30:180
2974231992820,4cyclictest0-21swapper/310:45:243
2974231992820,4cyclictest0-21swapper/307:40:253
2974231992818,6cyclictest3089229-21cron12:40:003
2974231992818,6cyclictest0-21swapper/309:05:253
297422899287,10cyclictest32-21ksoftirqd/209:40:002
297422899283,17cyclictest3005693-21sendmail-msp08:40:012
2974228992822,4cyclictest3042175-21kworker/u8:1+events_unbound10:24:132
2974228992822,4cyclictest0-21swapper/211:20:252
2974228992822,4cyclictest0-21swapper/211:20:252
2974228992822,3cyclictest0-21swapper/212:30:282
2974228992821,4cyclictest0-21swapper/211:45:132
2974228992820,5cyclictest0-21swapper/209:25:252
2974228992819,6cyclictest3067289-21grep11:35:162
2974228992819,6cyclictest3021413-21unixbench_multi09:20:242
2974228992819,5cyclictest0-21swapper/208:20:012
2974228992813,6cyclictest131rcu_preempt07:20:122
2974223992820,5cyclictest0-21swapper/109:55:001
2974223992820,5cyclictest0-21swapper/108:45:151
2974223992819,7cyclictest231ktimers/108:50:121
2974223992819,6cyclictest0-21swapper/112:24:591
297422399281,4cyclictest131rcu_preempt07:45:101
2974219992822,4cyclictest3073838-21latency_hist11:55:010
2974219992822,4cyclictest2981473-21kworker/u8:0+events_unbound07:53:430
2974219992821,5cyclictest3051055-21kworker/u8:2+events_unbound11:05:130
2974219992821,4cyclictest3047667-21apt10:40:000
2974219992820,5cyclictest0-21swapper/010:10:010
2974219992820,3cyclictest0-21swapper/012:25:240
2974219992819,5cyclictest0-21swapper/009:45:160
2974219992818,7cyclictest0-21swapper/012:10:000
2974219992817,7cyclictest3062824-21grep11:20:250
2974219992817,7cyclictest3062824-21grep11:20:240
2974219992817,7cyclictest2987296-21tune2fs07:45:150
2974219992816,8cyclictest0-21swapper/011:39:250
297421999281,23cyclictest3018462-21munin-run09:15:000
2974231992721,4cyclictest3076769-21kworker/u8:2+events_unbound12:04:313
2974231992720,3cyclictest0-21swapper/310:35:173
2974231992719,4cyclictest0-21swapper/310:25:003
2974231992718,6cyclictest3026657-21kworker/u8:0+events_unbound09:55:203
2974231992718,6cyclictest0-21swapper/308:55:013
2974231992718,5cyclictest0-21swapper/312:05:233
2974231992718,4cyclictest0-21swapper/310:50:263
2974231992716,7cyclictest0-21swapper/311:25:003
2974231992716,7cyclictest0-21swapper/311:24:593
2974228992720,4cyclictest0-21swapper/212:10:012
2974228992719,4cyclictest438-21cron09:20:012
2974228992718,4cyclictest0-21swapper/208:40:182
2974223992720,4cyclictest0-21swapper/108:15:001
2974223992719,4cyclictest0-21swapper/110:05:161
2974223992718,6cyclictest2983419-21sort07:35:021
2974223992718,6cyclictest0-21swapper/109:05:001
2974223992715,8cyclictest3045527-21grep10:30:251
2974223992715,8cyclictest3045527-21grep10:30:251
297421999274,19cyclictest0-21swapper/009:40:460
297421999274,19cyclictest0-21swapper/009:40:460
297421999272,9cyclictest11-21ksoftirqd/007:10:130
2974219992720,4cyclictest0-21swapper/007:25:160
2974219992718,6cyclictest3013163-21ls09:00:010
297421999271,7cyclictest3069846-21grep11:40:250
2974219992717,6cyclictest3042079-21unixbench_multi10:20:250
2974219992713,8cyclictest204-21dbus-daemon08:43:480
2974219992710,12cyclictest204-21dbus-daemon11:34:250
2974231992619,4cyclictest0-21swapper/309:15:243
2974231992619,3cyclictest3043004-21fschecks_time10:25:153
2974231992616,6cyclictest0-21swapper/309:30:003
2974231992616,6cyclictest0-21swapper/307:30:253
2974231992614,8cyclictest0-21swapper/308:25:253
2974228992620,3cyclictest0-21swapper/210:14:592
2974228992617,5cyclictest0-21swapper/211:25:232
2974228992613,9cyclictest204-21dbus-daemon08:28:452
297422399263,5cyclictest131rcu_preempt11:30:181
2974223992620,4cyclictest0-21swapper/112:30:211
2974223992619,4cyclictest0-21swapper/108:35:011
2974223992616,6cyclictest204-21dbus-daemon12:09:301
2974219992619,5cyclictest3034271-21kworker/u8:2+events_unbound10:00:200
2974219992619,5cyclictest3014713-21kworker/u8:1+events_unbound09:08:530
2974219992619,4cyclictest3089237-21sendmail12:40:000
2974219992618,3cyclictest0-21swapper/009:35:240
2974231992519,4cyclictest3012963-21kworker/u8:3+events_unbound08:58:523
2974231992519,3cyclictest0-21swapper/312:10:293
2974231992515,6cyclictest0-21swapper/311:04:203
2974228992516,6cyclictest3084519-21grep12:25:142
2974228992515,6cyclictest2986441-21grep07:40:252
2974228992515,6cyclictest0-21swapper/211:05:232
2974228992511,10cyclictest311ktimers/212:00:112
2974223992518,4cyclictest0-21swapper/107:50:251
2974223992517,4cyclictest0-21swapper/107:23:361
2974223992516,6cyclictest0-21swapper/107:25:261
2974223992515,7cyclictest1-21systemd07:43:391
297421999257,10cyclictest11-21ksoftirqd/009:00:180
297421999253,11cyclictest11-21ksoftirqd/008:29:490
297421999252,17cyclictest3049379-21cron10:45:000
2974219992518,5cyclictest2978113-21kworker/u8:1+events_unbound07:30:220
2974219992517,5cyclictest0-21swapper/007:40:000
297421999251,21cyclictest11-21ksoftirqd/008:20:140
2974231992418,3cyclictest0-21swapper/311:40:013
2974231992414,6cyclictest0-21swapper/310:55:253
2974231992414,6cyclictest0-21swapper/309:20:253
297423199241,13cyclictest0-21swapper/308:20:133
2974228992418,3cyclictest0-21swapper/209:40:162
2974228992418,3cyclictest0-21swapper/209:40:162
2974228992417,5cyclictest3081219-21sort12:15:182
2974228992415,6cyclictest2982049-21ls07:30:172
297422899241,13cyclictest0-21swapper/209:32:022
297422399244,3cyclictest131rcu_preempt08:55:131
297422399244,2cyclictest131rcu_preempt09:10:201
2974223992418,3cyclictest0-21swapper/110:55:161
2974223992417,5cyclictest3064774-21kworker/u8:2+events_unbound11:42:491
2974223992417,5cyclictest3020398-21kworker/u8:2+events_unbound09:33:461
2974223992417,4cyclictest3071966-21cron11:50:001
2974223992416,4cyclictest0-21swapper/109:45:161
2974223992415,7cyclictest3007056-21sed08:40:261
297421999248,10cyclictest3010269-21tr08:50:190
297421999247,10cyclictest11-21ksoftirqd/010:30:150
297421999247,10cyclictest11-21ksoftirqd/010:30:140
2974219992418,3cyclictest13850irq/36-mmc110:00:010
2974219992415,4cyclictest0-21swapper/011:45:230
297421999241,4cyclictest2978802-21latency07:20:180
297421999241,19cyclictest0-21swapper/012:33:390
297421999240,20cyclictest0-21swapper/010:19:510
297421999240,12cyclictest0-21swapper/009:52:140
2974231992316,4cyclictest0-21swapper/308:45:183
2974231992316,3cyclictest0-21swapper/307:55:233
2974231992315,5cyclictest0-21swapper/310:20:003
2974231992314,6cyclictest0-21swapper/311:50:163
2974231992313,6cyclictest0-21swapper/311:10:243
2974231992313,6cyclictest0-21swapper/308:15:243
2974231992313,6cyclictest0-21swapper/307:10:263
297422899235,5cyclictest3026657-21kworker/u8:0+events_unbound10:04:052
2974228992316,3cyclictest0-21swapper/211:50:252
2974223992317,3cyclictest0-21swapper/107:15:231
297422399231,5cyclictest131rcu_preempt12:35:111
2974223992315,5cyclictest0-21swapper/110:25:151
2974223992315,5cyclictest0-21swapper/109:40:141
2974223992315,5cyclictest0-21swapper/109:40:141
2974231992216,3cyclictest0-21swapper/309:10:163
2974231992213,6cyclictest0-21swapper/307:50:133
2974231992211,8cyclictest3044606-21df_inode10:30:153
2974231992211,8cyclictest3044606-21df_inode10:30:143
2974231992210,6cyclictest0-21swapper/307:50:013
2974223992215,4cyclictest3022645-21ntpq09:25:201
2974223992214,5cyclictest0-21swapper/112:20:011
297422399221,13cyclictest3005666-21sendmail08:40:001
297421999220,18cyclictest0-21swapper/011:11:140
2974231992115,4cyclictest3086070-21apt12:30:173
2974231992113,4cyclictest0-21swapper/310:10:203
2974231992111,7cyclictest3003053-21ntp_states08:30:223
2974231992014,3cyclictest3030638-21/usr/sbin/munin09:50:193
2974228992013,5cyclictest311ktimers/212:20:112
2974223992014,3cyclictest0-21swapper/110:00:141
2974231991812,3cyclictest2976162-21munin-node07:25:113
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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