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2026-08-15 - 21:17

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #4

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 rackeslot4s.osadl.org (updated Sat Aug 15, 2026 12:44:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3090634994843,3cyclictest335557-21systemd-journal10:30:010
3090634994741,4cyclictest3407356-21latency_hist12:15:000
3090634994335,6cyclictest3376411-21latency_hist11:45:000
3090641994234,5cyclictest3153203-21cp08:10:012
3090644994135,4cyclictest3205050-21latency_hist09:00:003
3090641994136,4cyclictest3210229-21kworker/u8:1+flush-259:009:40:262
3090634994135,4cyclictest335557-21systemd-journal10:10:000
3090641994037,2cyclictest3220233-21kworker/u8:0+flush-259:011:40:252
3090641994034,4cyclictest3266994-21kworker/u8:3+flush-259:010:35:012
3090644993935,3cyclictest3314388-21kworker/u8:3+flush-259:010:50:013
3090641993935,3cyclictest3220233-21kworker/u8:0+flush-259:010:25:112
3090641993935,2cyclictest3210229-21kworker/u8:1+events_unbound10:15:232
3090634993834,3cyclictest3210229-21kworker/u8:1+flush-259:011:30:250
3090634993629,4cyclictest3246317-21latency_hist09:40:010
3090634993529,4cyclictest3350591-21latency_hist11:20:000
3090639993430,3cyclictest3309428-21apt-get10:40:111
3090634993430,3cyclictest3220233-21kworker/u8:0+flush-259:011:25:230
3090641993329,3cyclictest3381351-21kworker/u8:2+events_unbound11:50:192
3090641993329,3cyclictest3210229-21kworker/u8:1+events_unbound11:30:252
3090639993326,5cyclictest3110402-21ntpq07:25:211
3090641993229,2cyclictest3116287-21kworker/u8:2+flush-259:009:05:232
3090641993229,2cyclictest1033607-21kworker/u8:4+flush-259:008:35:232
3090641993229,2cyclictest1033607-21kworker/u8:4+flush-259:007:15:152
3090641993228,3cyclictest3319589-21kworker/u8:4+events_unbound11:09:312
3090641993227,3cyclictest3220233-21kworker/u8:0+events_unbound09:15:212
3090634993225,5cyclictest335557-21systemd-journal10:35:170
3090644993127,3cyclictest335557-21systemd-journal07:56:263
3090641993127,3cyclictest3381351-21kworker/u8:2+events_unbound12:38:412
3090639993128,2cyclictest3298808-21kworker/u8:2+flush-259:010:40:011
3090634993126,4cyclictest3418297-21kworker/u8:0+events_unbound12:30:230
3090634993125,4cyclictest3433525-21latency_hist12:40:010
3090644993026,3cyclictest3210229-21kworker/u8:1+flush-259:010:30:013
3090641993026,3cyclictest3220233-21kworker/u8:0+events_unbound11:25:222
3090641993025,3cyclictest3116287-21kworker/u8:2+flush-259:009:20:212
3090639993026,3cyclictest3220233-21kworker/u8:0+flush-259:010:50:251
3090634993024,4cyclictest3385801-21ntpq11:50:210
3090641992925,3cyclictest3366025-21kworker/u8:3+flush-259:012:10:202
3090641992925,3cyclictest1033607-21kworker/u8:4+flush-259:008:50:222
3090641992924,3cyclictest3106097-21latency_hist07:25:012
3090639992926,2cyclictest3116287-21kworker/u8:2+flush-259:008:55:251
3090639992925,3cyclictest3319589-21kworker/u8:4+flush-259:011:15:231
3090639992924,4cyclictest3366025-21kworker/u8:3+flush-259:011:50:171
3090634992925,3cyclictest3210229-21kworker/u8:1+flush-259:011:10:170
3090634992923,4cyclictest3418491-21diskstats12:25:150
3090644992825,2cyclictest1033607-21kworker/u8:4+flush-259:008:40:003
3090644992824,3cyclictest335557-21systemd-journal07:16:263
3090641992824,3cyclictest3381351-21kworker/u8:2+events_unbound11:55:212
3090641992824,3cyclictest3366025-21kworker/u8:3+events_unbound12:20:012
3090641992824,3cyclictest3116287-21kworker/u8:2+events_unbound08:16:292
3090641992824,3cyclictest1033607-21kworker/u8:4+flush-259:008:25:152
3090641992824,2cyclictest1033607-21kworker/u8:4+events_unbound08:10:172
3090639992824,3cyclictest3402219-21kworker/u8:1+flush-259:012:35:361
3090639992824,3cyclictest3210229-21kworker/u8:1+flush-259:009:45:251
3090639992824,3cyclictest3116287-21kworker/u8:2+flush-259:008:40:251
3090634992825,2cyclictest3116287-21kworker/u8:2+flush-259:009:25:290
3090634992824,3cyclictest3220233-21kworker/u8:0+flush-259:010:40:160
3090634992824,3cyclictest3210229-21kworker/u8:1+events_unbound09:55:230
3090644992723,3cyclictest3366025-21kworker/u8:3+flush-259:012:25:013
3090641992723,3cyclictest3418297-21kworker/u8:0+flush-259:012:30:252
3090641992723,3cyclictest1033607-21kworker/u8:4+events_unbound08:04:292
3090639992723,3cyclictest3418297-21kworker/u8:0+flush-259:012:30:161
3090639992722,3cyclictest3381537-40mandb11:49:551
3090644992623,2cyclictest3210229-21kworker/u8:1+events_unbound11:30:233
3090644992622,3cyclictest509-21rs:main3
3090644992620,4cyclictest3386721-21latency_hist11:55:013
3090641992623,2cyclictest3116287-21kworker/u8:2+events_unbound08:44:302
3090641992621,3cyclictest3220233-21kworker/u8:0+flush-259:011:35:222
3090639992622,3cyclictest1033607-21kworker/u8:4+flush-259:008:50:231
3090634992621,3cyclictest509-21rs:main0
3090634992620,4cyclictest3402172-21latency_hist12:10:000
3090644992522,2cyclictest3381351-21kworker/u8:2+events_unbound12:00:153
3090644992522,2cyclictest1033607-21kworker/u8:4+flush-259:008:15:013
3090644992521,3cyclictest1033607-21kworker/u8:4+events_unbound08:05:203
3090639992522,2cyclictest3126405-21kworker/u8:0+flush-259:007:50:181
3090639992521,3cyclictest335557-21systemd-journal09:20:001
3090639992519,4cyclictest3225969-21/usr/sbin/munin09:20:231
3090634992522,2cyclictest3392133-21apt-get12:00:120
3090634992522,2cyclictest3220233-21kworker/u8:0+flush-259:011:00:230
3090634992521,3cyclictest1033607-21kworker/u8:4+flush-259:008:45:000
3090634992520,4cyclictest335557-21systemd-journal10:20:010
3090634992519,4cyclictest3115506-21ntpq07:30:210
3090644992421,2cyclictest3266994-21kworker/u8:3+flush-259:010:00:263
3090644992419,4cyclictest3335077-21latency_hist11:05:003
3090644992418,4cyclictest3095760-21latency_hist07:15:013
3090641992420,3cyclictest3402219-21kworker/u8:1+flush-259:012:30:002
3090641992420,3cyclictest3366025-21kworker/u8:3+events_unbound12:20:292
3090641992420,3cyclictest3220233-21kworker/u8:0+flush-259:011:45:212
3090641992420,3cyclictest3220233-21kworker/u8:0+events_unbound10:50:222
3090641992420,2cyclictest1033607-21kworker/u8:4+flush-259:007:55:232
3090641992419,4cyclictest3319589-21kworker/u8:4+events_unbound11:15:282
3090641992419,4cyclictest3210229-21kworker/u8:1+flush-259:009:55:132
3090639992420,3cyclictest3366025-21kworker/u8:3+events_unbound12:15:211
3090639992420,3cyclictest3116287-21kworker/u8:2+events_unbound07:35:231
3090634992421,2cyclictest3266994-21kworker/u8:3+events_unbound10:10:120
3090634992419,4cyclictest3116688-21apt-get07:35:120
3090644992320,2cyclictest3381351-21kworker/u8:2+flush-259:011:55:223
3090644992320,2cyclictest3075206-21kworker/u8:0+flush-259:007:25:173
3090644992319,3cyclictest335557-21systemd-journal11:45:243
3090644992319,3cyclictest335557-21systemd-journal10:00:003
3090641992320,3cyclictest3266994-21kworker/u8:3+flush-259:010:00:262
3090641992319,3cyclictest3220233-21kworker/u8:0+events_unbound11:00:212
3090641992315,5cyclictest509-21rs:main2
3090639992320,2cyclictest3220233-21kworker/u8:0+flush-259:009:55:211
3090639992318,4cyclictest3251507-21latency_hist09:45:011
3090634992320,2cyclictest3210229-21kworker/u8:1+flush-259:009:40:180
3090634992319,3cyclictest1033607-21kworker/u8:4+flush-259:009:00:170
3090634992319,3cyclictest1033607-21kworker/u8:4+events_unbound07:20:220
3090634992319,3cyclictest1033607-21kworker/u8:4+events_unbound07:15:280
3090644992219,2cyclictest3266994-21kworker/u8:3+events_unbound10:10:213
3090644992219,2cyclictest3116287-21kworker/u8:2+flush-259:009:15:113
3090641992219,2cyclictest3116287-21kworker/u8:2+events_unbound07:35:072
3090641992218,3cyclictest1033607-21kworker/u8:4+flush-259:008:45:162
3090641992216,2cyclictest3210229-21kworker/u8:1+events_unbound09:30:202
3090639992219,2cyclictest3220233-21kworker/u8:0+flush-259:009:35:221
3090639992219,2cyclictest3116287-21kworker/u8:2+flush-259:008:30:271
3090639992218,3cyclictest3210229-21kworker/u8:1+flush-259:011:30:301
3090639992217,4cyclictest335557-21systemd-journal08:39:591
3090634992219,2cyclictest3220233-21kworker/u8:0+flush-259:011:05:170
3090634992218,3cyclictest3189889-21apt-get08:45:120
3090634992214,6cyclictest3416761-21ntpq12:20:220
3090644992118,2cyclictest3220233-21kworker/u8:0+flush-259:009:35:153
3090644992117,3cyclictest3220233-21kworker/u8:0+flush-259:010:35:213
3090644992117,3cyclictest3220233-21kworker/u8:0+flush-259:009:30:053
3090641992118,2cyclictest3106117-21kworker/u8:1+flush-259:007:40:192
3090641992117,3cyclictest3220233-21kworker/u8:0+events_unbound10:20:262
3090641992117,3cyclictest3116287-21kworker/u8:2+events_unbound09:25:262
3090641992116,4cyclictest3075206-21kworker/u8:0+events_unbound07:30:122
3090639992118,2cyclictest3220233-21kworker/u8:0+flush-259:010:05:181
3090639992118,2cyclictest3210229-21kworker/u8:1+events_unbound09:50:191
3090639992117,3cyclictest3210229-21kworker/u8:1+events_unbound11:10:231
3090639992117,3cyclictest3116287-21kworker/u8:2+flush-259:009:00:241
3090634992119,1cyclictest3210229-21kworker/u8:1+events_unbound10:45:230
3090634992118,2cyclictest3226411-21ps09:20:160
3090644992017,2cyclictest3220233-21kworker/u8:0+flush-259:010:50:203
3090644992017,2cyclictest3116287-21kworker/u8:2+flush-259:007:35:173
3090644992017,2cyclictest1033607-21kworker/u8:4+flush-259:007:20:233
3090644992016,3cyclictest3106117-21kworker/u8:1+events_unbound07:40:223
3090644992016,2cyclictest3220233-21kworker/u8:0+flush-259:011:20:163
3090644992015,3cyclictest335557-21systemd-journal12:20:003
3090644992013,5cyclictest3246746-21diskstats09:40:153
3090641992017,2cyclictest3210229-21kworker/u8:1+flush-259:011:10:262
3090641992016,3cyclictest1033607-21kworker/u8:4+flush-259:007:45:192
3090639992018,1cyclictest3236071-21sh09:30:001
3090639992017,2cyclictest3402219-21kworker/u8:1+events_unbound12:10:281
3090639992017,2cyclictest1033607-21kworker/u8:4+events_unbound07:45:221
3090639992016,3cyclictest1033607-21kworker/u8:4+flush-259:008:10:141
3090634992017,2cyclictest3220233-21kworker/u8:0+events_unbound11:20:220
3090634992016,3cyclictest3164050-21apt-get08:20:120
3090644991916,2cyclictest3418297-21kworker/u8:0+flush-259:012:30:193
3090644991916,2cyclictest3220233-21kworker/u8:0+events_unbound10:20:203
3090644991915,3cyclictest3220233-21kworker/u8:0+events_unbound11:41:303
3090644991915,3cyclictest3116287-21kworker/u8:2+flush-259:008:30:153
3090641991916,2cyclictest3220233-21kworker/u8:0+flush-259:010:05:192
3090641991916,2cyclictest3220233-21kworker/u8:0+events_unbound10:40:152
3090641991915,3cyclictest3220233-21kworker/u8:0+flush-259:010:55:122
3090641991915,3cyclictest3220233-21kworker/u8:0+events_unbound10:35:252
3090641991915,3cyclictest3116287-21kworker/u8:2+events_unbound08:55:152
3090641991915,2cyclictest3075206-21kworker/u8:0+events_unbound07:10:202
3090641991911,6cyclictest3282579-21cp10:15:012
3090639991915,3cyclictest3366025-21kworker/u8:3+flush-259:011:35:241
3090639991915,3cyclictest3220233-21kworker/u8:0+flush-259:011:00:211
3090634991916,2cyclictest3169203-21apt-get08:25:120
3090634991916,2cyclictest3116287-21kworker/u8:2+flush-259:009:05:210
3090634991915,3cyclictest3210229-21kworker/u8:1+flush-259:009:45:220
3090644991815,2cyclictest3366025-21kworker/u8:3+flush-259:012:05:203
3090644991815,2cyclictest3116287-21kworker/u8:2+events_unbound08:25:013
3090644991814,3cyclictest3220233-21kworker/u8:0+flush-259:010:15:213
3090644991814,3cyclictest1033607-21kworker/u8:4+flush-259:008:00:253
3090644991814,3cyclictest1033607-21kworker/u8:4+events_unbound08:40:293
3090641991815,2cyclictest3220233-21kworker/u8:0+events_unbound11:20:082
3090641991815,2cyclictest3126405-21kworker/u8:0+events_unbound07:50:212
3090641991815,2cyclictest3116287-21kworker/u8:2+flush-259:009:00:222
3090641991814,3cyclictest3220233-21kworker/u8:0+flush-259:009:35:162
3090639991815,2cyclictest3381351-21kworker/u8:2+events_unbound12:00:261
3090639991815,2cyclictest3210229-21kworker/u8:1+flush-259:011:25:011
3090639991815,2cyclictest0-21swapper/111:10:001
3090639991814,3cyclictest3220233-21kworker/u8:0+flush-259:010:25:231
3090639991814,3cyclictest3220233-21kworker/u8:0+events_unbound11:29:301
3090639991813,4cyclictest335557-21systemd-journal07:25:011
3090634991815,2cyclictest1033607-21kworker/u8:4+flush-259:007:50:250
3090634991814,3cyclictest3153044-21gpgv08:10:000
3090644991714,2cyclictest3220233-21kworker/u8:0+flush-259:010:40:163
3090644991714,2cyclictest3220233-21kworker/u8:0+flush-259:010:05:243
3090644991713,3cyclictest3220233-21kworker/u8:0+flush-259:010:55:213
3090644991713,3cyclictest3116287-21kworker/u8:2+events_unbound08:18:303
3090644991713,3cyclictest1033607-21kworker/u8:4+flush-259:009:00:073
3090641991714,2cyclictest3116287-21kworker/u8:2+flush-259:008:20:202
3090641991713,3cyclictest3116287-21kworker/u8:2+events_unbound09:13:282
3090641991713,3cyclictest1033607-21kworker/u8:4+events_unbound08:33:232
3090641991712,4cyclictest3210229-21kworker/u8:1+events_unbound09:48:262
3090634991714,2cyclictest3215658-21apt-get09:10:130
3090634991714,2cyclictest3210229-21kworker/u8:1+events_unbound09:30:160
3090634991712,4cyclictest3179270-21latency_hist08:35:000
3090644991614,2cyclictest3116287-21kworker/u8:2+flush-259:009:10:203
3090644991613,2cyclictest3210229-21kworker/u8:1+events_unbound09:46:323
3090644991612,3cyclictest3381351-21kworker/u8:2+flush-259:012:25:163
3090644991612,3cyclictest1033607-21kworker/u8:4+events_unbound08:27:273
3090644991612,3cyclictest1033607-21kworker/u8:4+events_unbound07:45:173
3090644991612,3cyclictest1033607-21kworker/u8:4+events_unbound07:30:223
3090641991614,2cyclictest3366025-21kworker/u8:3+flush-259:012:05:142
3090641991612,3cyclictest3210229-21kworker/u8:1+events_unbound10:50:002
3090639991613,2cyclictest1033607-21kworker/u8:4+flush-259:009:05:161
3090639991612,3cyclictest1033607-21kworker/u8:4+events_unbound07:55:181
3090639991611,4cyclictest335557-21systemd-journal08:25:011
3090639991611,3cyclictest335557-21systemd-journal12:05:381
3090634991614,1cyclictest60350irq/132-enp0s29f1:rx-010:55:170
3090634991614,1cyclictest60350irq/132-enp0s29f1:rx-010:00:260
3090634991614,1cyclictest60350irq/132-enp0s29f1:rx-007:48:470
3090634991612,3cyclictest3075206-21kworker/u8:0+events_unbound07:10:270
3090644991511,3cyclictest3220233-21kworker/u8:0+events_unbound11:05:153
3090644991510,4cyclictest3210229-21kworker/u8:1+events_unbound11:18:313
3090641991512,2cyclictest3220233-21kworker/u8:0+events_unbound09:50:072
3090641991511,3cyclictest3381351-21kworker/u8:2+events_unbound12:01:562
3090639991513,1cyclictest3266994-21kworker/u8:3+events_unbound10:10:151
3090639991512,2cyclictest3381351-21kworker/u8:2+flush-259:012:25:201
3090639991512,2cyclictest3220233-21kworker/u8:0+flush-259:010:20:161
3090639991511,3cyclictest3210229-21kworker/u8:1+events_unbound10:45:191
3090639991511,3cyclictest3116287-21kworker/u8:2+flush-259:008:17:311
3090634991513,2cyclictest3381351-21kworker/u8:2+events_unbound11:55:270
3090634991513,2cyclictest3210229-21kworker/u8:1+events_unbound09:51:300
3090634991513,1cyclictest60350irq/132-enp0s29f1:rx-007:25:150
3090634991512,2cyclictest60350irq/132-enp0s29f1:rx-010:30:150
3090634991512,2cyclictest60350irq/132-enp0s29f1:rx-008:35:120
3090634991512,2cyclictest60350irq/132-enp0s29f1:rx-008:16:540
3090634991512,2cyclictest60350irq/132-enp0s29f1:rx-008:01:550
3090634991512,2cyclictest60350irq/132-enp0s29f1:rx-007:40:130
3090644991411,2cyclictest3116287-21kworker/u8:2+flush-259:009:25:173
3090644991411,2cyclictest3116287-21kworker/u8:2+flush-259:009:20:213
3090644991410,3cyclictest3210229-21kworker/u8:1+events_unbound11:10:213
3090639991412,1cyclictest0-21swapper/112:00:001
3090639991411,2cyclictest3116287-21kworker/u8:2+events_unbound08:00:191
3090639991411,2cyclictest1033607-21kworker/u8:4+flush-259:007:15:171
3090639991410,3cyclictest3116287-21kworker/u8:2+events_unbound09:10:141
3090634991412,1cyclictest60350irq/132-enp0s29f1:rx-011:45:250
3090634991412,1cyclictest60350irq/132-enp0s29f1:rx-009:15:170
3090634991412,1cyclictest60350irq/132-enp0s29f1:rx-008:54:390
3090634991411,2cyclictest3366025-21kworker/u8:3+events_unbound11:35:210
3090634991411,2cyclictest0-21swapper/007:10:010
3090634991410,3cyclictest3366025-21kworker/u8:3+events_unbound12:15:180
3090634991410,3cyclictest3319589-21kworker/u8:4+flush-259:010:53:010
3090644991310,2cyclictest3210229-21kworker/u8:1+flush-259:009:50:433
3090634991311,1cyclictest60350irq/132-enp0s29f1:rx-008:55:170
3090634991311,1cyclictest60350irq/132-enp0s29f1:rx-008:10:230
309064499129,3cyclictest3210229-21kworker/u8:1+events_unbound10:30:223
309064499129,2cyclictest3220233-21kworker/u8:0+flush-259:011:25:243
309064499128,3cyclictest3116287-21kworker/u8:2+flush-259:008:47:013
309064499128,3cyclictest3116287-21kworker/u8:2+events_unbound08:50:313
3090644991210,1cyclictest1033607-21kworker/u8:4+events_unbound07:50:253
309063999129,2cyclictest3366025-21kworker/u8:3+flush-259:012:20:141
309063999129,2cyclictest1033607-21kworker/u8:4+flush-259:008:05:171
3090639991210,1cyclictest3288065-21cron10:20:001
309064499118,2cyclictest3210543-21cpuspeed_turbos09:05:133
309064499117,3cyclictest3366025-21kworker/u8:3+events_unbound11:36:303
309063999118,2cyclictest3111732-21fschecks_count07:30:151
309063999118,2cyclictest3091863-21kthreadcore07:10:171
309063999117,3cyclictest3220233-21kworker/u8:0+flush-259:010:00:161
309064499106,3cyclictest3402638-21fschecks_count12:10:153
309063999108,1cyclictest0-21swapper/108:50:001
309063499107,2cyclictest60350irq/132-enp0s29f1:rx-007:55:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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