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2026-04-23 - 01:54

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 the 376 highest latencies:
System rackeslot4s.osadl.org (updated Wed Apr 22, 2026 12:44:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
601129995043,4cyclictest601043-21latency_hist07:10:023
601126994640,4cyclictest876532-21latency_hist11:35:002
601122994643,2cyclictest653083-21kworker/u8:0+events_unbound08:25:131
601122994542,2cyclictest876551-21kworker/u8:2+events_unbound11:45:211
601122994440,3cyclictest840628-21kworker/u8:3+flush-259:011:25:011
601126994235,5cyclictest907433-21apt-get12:05:002
601122994239,2cyclictest855932-21kworker/u8:0+flush-259:011:30:211
601122994138,2cyclictest840628-21kworker/u8:3+flush-259:011:25:201
601122994037,2cyclictest876551-21kworker/u8:2+flush-259:011:40:171
601122994037,2cyclictest642629-21kworker/u8:2+events_unbound07:55:201
601122993936,2cyclictest830091-21kworker/u8:1+events_unbound11:02:121
601122993936,2cyclictest601108-21kworker/u8:1+events_unbound07:25:151
601122993936,2cyclictest540443-21kworker/u8:5+flush-259:007:20:211
601122993935,3cyclictest830305-21kworker/u8:2+flush-259:010:55:211
601119993937,1cyclictest861131-21kworker/0:0+pm12:03:290
601122993835,2cyclictest601108-21kworker/u8:1+flush-259:007:20:011
601122993834,3cyclictest855932-21kworker/u8:0+flush-259:011:55:011
601122993834,3cyclictest750975-21kworker/u8:0+flush-259:010:05:201
601122993833,3cyclictest658464-21/usr/sbin/munin08:05:131
601122993734,2cyclictest653083-21kworker/u8:0+flush-259:008:50:011
601122993727,3cyclictest694376-21kworker/u8:3+events_unbound08:55:141
601119993733,3cyclictest601108-21kworker/u8:1+events_unbound08:17:170
601129993627,6cyclictest252-21systemd-journal11:45:013
601122993633,2cyclictest855932-21kworker/u8:0+events_unbound12:05:231
601122993631,4cyclictest252-21systemd-journal10:45:011
601122993631,3cyclictest252-21systemd-journal09:41:141
601119993632,3cyclictest881919-21kworker/u8:3+flush-259:011:40:250
601122993531,3cyclictest601108-21kworker/u8:1+flush-259:008:45:001
601119993530,3cyclictest876551-21kworker/u8:2+events_unbound11:45:130
601122993431,2cyclictest714940-21kworker/u8:2+events_unbound09:33:111
601122993431,2cyclictest601108-21kworker/u8:1+flush-259:007:30:201
601122993431,2cyclictest601108-21kworker/u8:1+events_unbound09:12:261
601122993430,3cyclictest540443-21kworker/u8:5+events_unbound08:05:001
601122993330,2cyclictest897341-21kworker/u8:4+flush-259:011:55:201
601119993330,3cyclictest730582-21kworker/u8:0+flush-259:009:15:180
601119993329,3cyclictest714940-21kworker/u8:2+events_unbound09:30:140
601119993328,4cyclictest601108-21kworker/u8:1+events_unbound08:10:010
601126993224,5cyclictest913015-21latency_hist12:10:002
601122993229,2cyclictest793583-21kworker/u8:5+flush-259:011:05:211
601122993229,2cyclictest750975-21kworker/u8:0+flush-259:009:50:211
601122993229,2cyclictest740863-21kworker/u8:1+events_unbound09:28:161
601122993228,3cyclictest730582-21kworker/u8:0+events_unbound09:25:001
601119993229,2cyclictest653083-21kworker/u8:0+events_unbound08:35:160
601119993228,3cyclictest653083-21kworker/u8:0+flush-259:008:24:540
601119993227,4cyclictest876551-21kworker/u8:2+events_unbound11:50:160
601126993127,3cyclictest694376-21kworker/u8:3+flush-259:008:55:172
601122993128,2cyclictest540443-21kworker/u8:5+events_unbound08:10:151
601122993128,2cyclictest540443-21kworker/u8:5+events_unbound08:10:141
601122993127,3cyclictest840628-21kworker/u8:3+events_unbound11:15:181
601122993127,3cyclictest793583-21kworker/u8:5+events_unbound10:30:171
601122993126,4cyclictest714940-21kworker/u8:2+events_unbound10:10:161
601122993126,3cyclictest897341-21kworker/u8:4+flush-259:012:20:201
601122993126,3cyclictest637628-21base6407:45:001
601119993126,4cyclictest876792-21apt-get11:35:120
601129993024,4cyclictest809093-21latency_hist10:30:013
601129993018,10cyclictest601108-21kworker/u8:1+flush-259:008:10:003
601126993023,5cyclictest715337-21diskstats09:00:142
601122993027,2cyclictest750975-21kworker/u8:0+events_unbound09:35:131
601122993026,3cyclictest820362-21kworker/u8:0+flush-259:010:45:201
601119993026,3cyclictest907663-21kworker/u8:1+events_unbound12:25:180
601119993024,4cyclictest252-21systemd-journal11:08:130
601122992926,2cyclictest762332-21kworker/u8:4+flush-259:009:45:181
601122992926,2cyclictest601108-21kworker/u8:1+events_unbound08:50:171
601122992925,3cyclictest897341-21kworker/u8:4+events_unbound12:03:301
601122992925,3cyclictest684027-21kworker/u8:2+flush-259:008:35:011
601122992921,5cyclictest252-21systemd-journal10:55:001
601119992926,2cyclictest714940-21kworker/u8:2+flush-259:010:15:000
601119992925,3cyclictest653083-21kworker/u8:0+events_unbound08:00:220
60111999290,27cyclictest1-21systemd08:58:140
601129992821,5cyclictest861108-21latency_hist11:20:013
601129992821,5cyclictest834396-21ntpq10:50:193
601126992825,2cyclictest876551-21kworker/u8:2+events_unbound11:40:152
601126992824,3cyclictest876551-21kworker/u8:2+flush-259:011:45:152
601126992824,3cyclictest767382-21gpgv09:50:002
601122992824,3cyclictest601108-21kworker/u8:1+events_unbound07:11:141
601119992825,2cyclictest714940-21kworker/u8:2+flush-259:009:30:010
601119992824,3cyclictest762332-21kworker/u8:4+flush-259:010:46:530
601129992714,5cyclictest637223-21gpgv07:45:003
601126992724,2cyclictest540443-21kworker/u8:5+events_unbound07:20:152
601126992723,3cyclictest897341-21kworker/u8:4+flush-259:012:15:232
601126992723,3cyclictest658490-21apt-get08:05:112
601126992723,3cyclictest601108-21kworker/u8:1+flush-259:007:40:192
601122992723,3cyclictest897341-21kworker/u8:4+flush-259:012:10:241
601122992722,3cyclictest643367-21apt-get07:50:141
601119992723,3cyclictest840628-21kworker/u8:3+events_unbound11:25:230
601119992723,3cyclictest762332-21kworker/u8:4+flush-259:010:25:210
601119992720,5cyclictest642705-21latency_hist07:50:000
601129992617,7cyclictest252-21systemd-journal11:05:013
601129992614,10cyclictest0-21swapper/307:34:593
601129992613,5cyclictest621676-21latency_hist07:30:003
601126992622,3cyclictest897341-21kworker/u8:4+events_unbound12:10:122
601126992622,3cyclictest627093-21apt-get07:35:102
601126992620,4cyclictest714940-21kworker/u8:2+events_unbound09:55:152
601122992623,2cyclictest830091-21kworker/u8:1+flush-259:011:35:201
601122992622,3cyclictest601108-21kworker/u8:1+events_unbound08:15:151
601119992623,2cyclictest750975-21kworker/u8:0+flush-259:009:35:160
601119992621,4cyclictest861532-21diskstats11:20:140
60111999260,24cyclictest1-21systemd07:25:000
601129992519,4cyclictest750024-21ntpq09:30:213
601129992519,4cyclictest252-21systemd-journal10:20:003
601126992521,3cyclictest814272-21base6410:35:012
601126992521,3cyclictest725215-21kworker/u8:3+events_unbound10:20:012
601122992522,2cyclictest762332-21kworker/u8:4+events_unbound10:35:241
601122992521,3cyclictest907663-21kworker/u8:1+events_unbound12:19:031
601122992518,5cyclictest778037-21latency_hist10:00:011
601119992522,2cyclictest897341-21kworker/u8:4+flush-259:012:10:250
601119992521,3cyclictest730582-21kworker/u8:0+events_unbound09:20:170
601119992521,3cyclictest725215-21kworker/u8:3+flush-259:010:00:000
601129992420,3cyclictest740897-21apt-get09:25:113
601126992420,3cyclictest907663-21kworker/u8:1+events_unbound12:20:162
601122992421,2cyclictest913247-21kworker/u8:2+flush-259:012:25:241
601122992421,2cyclictest730582-21kworker/u8:0+events_unbound09:15:141
601119992420,3cyclictest830091-21kworker/u8:1+events_unbound11:00:180
601129992316,5cyclictest762102-21latency_hist09:45:003
601129992316,5cyclictest252-21systemd-journal10:21:123
601126992320,2cyclictest820362-21kworker/u8:0+events_unbound10:45:142
601126992319,3cyclictest840628-21kworker/u8:3+flush-259:011:10:242
601126992319,3cyclictest830305-21kworker/u8:2+events_unbound10:55:242
601126992317,4cyclictest648351-21diskstats07:55:132
601126992317,4cyclictest252-21systemd-journal10:50:132
601122992320,2cyclictest907663-21kworker/u8:1+events_unbound12:30:211
601122992320,2cyclictest840628-21kworker/u8:3+flush-259:011:10:161
601122992320,2cyclictest793583-21kworker/u8:5+events_unbound10:20:181
601122992317,3cyclictest626847-21kworker/u8:0+events_unbound07:40:151
601119992319,3cyclictest750975-21kworker/u8:0+flush-259:009:40:220
601119992319,3cyclictest653083-21kworker/u8:0+events_unbound08:25:210
601119992319,3cyclictest601108-21kworker/u8:1+flush-259:008:45:210
601129992217,3cyclictest788615-21/usr/sbin/munin10:10:133
601126992219,2cyclictest540443-21kworker/u8:5+events_unbound07:15:202
601126992218,3cyclictest855932-21kworker/u8:0+events_unbound11:15:222
601126992218,3cyclictest653083-21kworker/u8:0+flush-259:008:50:212
601126992216,4cyclictest751595-21/usr/sbin/munin09:35:142
601126992216,4cyclictest735730-21/usr/sbin/munin09:20:132
601122992218,3cyclictest601108-21kworker/u8:1+events_unbound09:06:251
601122992215,5cyclictest720082-21latency_hist09:05:011
601119992219,2cyclictest793583-21kworker/u8:5+flush-259:010:45:010
601119992218,3cyclictest913247-21kworker/u8:2+flush-259:012:15:200
601119992218,3cyclictest830091-21kworker/u8:1+flush-259:011:10:200
601119992218,3cyclictest642629-21kworker/u8:2+flush-259:007:55:200
601119992218,2cyclictest933434-21kworker/u8:0+flush-259:012:35:000
601129992114,4cyclictest653083-21kworker/u8:0+flush-259:008:25:163
601126992117,3cyclictest750975-21kworker/u8:0+flush-259:009:40:202
601126992115,5cyclictest772881-21latency_hist09:55:002
601119992118,2cyclictest830305-21kworker/u8:2+events_unbound10:50:130
601119992118,2cyclictest750975-21kworker/u8:0+events_unbound10:00:220
601119992118,2cyclictest601108-21kworker/u8:1+events_unbound07:33:170
601119992117,3cyclictest653083-21kworker/u8:0+events_unbound08:53:310
601119992116,4cyclictest750975-21kworker/u8:0+flush-259:009:45:150
601129992017,2cyclictest913247-21kworker/u8:2+flush-259:012:15:003
601126992016,3cyclictest653083-21kworker/u8:0+flush-259:008:00:252
601119992017,2cyclictest601108-21kworker/u8:1+events_unbound07:10:240
601119992016,3cyclictest601108-21kworker/u8:1+flush-259:008:40:180
601129991915,3cyclictest601108-21kworker/u8:1+events_unbound07:45:193
601126991915,3cyclictest798995-21kworker/u8:0+events_unbound10:25:152
601126991915,3cyclictest653083-21kworker/u8:0+flush-259:008:25:232
601126991915,3cyclictest540443-21kworker/u8:5+flush-259:007:25:212
601122991915,3cyclictest938711-21kworker/u8:2+events_unbound12:37:131
601119991916,2cyclictest626847-21kworker/u8:0+flush-259:007:40:110
601119991915,3cyclictest897341-21kworker/u8:4+events_unbound12:21:130
601119991915,3cyclictest855932-21kworker/u8:0+flush-259:011:30:200
601119991915,3cyclictest840628-21kworker/u8:3+events_unbound11:19:090
601119991915,3cyclictest793583-21kworker/u8:5+events_unbound10:30:210
601119991915,3cyclictest601108-21kworker/u8:1+events_unbound09:05:180
601129991814,2cyclictest757004-21gpgv09:40:013
601129991813,4cyclictest653083-21kworker/u8:0+flush-259:009:00:243
601129991812,4cyclictest814720-21cat10:35:003
601129991811,4cyclictest944044-21latency_hist12:40:013
601126991814,3cyclictest540443-21kworker/u8:5+flush-259:008:10:262
601126991814,3cyclictest540443-21kworker/u8:5+flush-259:008:10:252
601126991813,4cyclictest714940-21kworker/u8:2+events_unbound10:10:202
601122991815,2cyclictest601108-21kworker/u8:1+flush-259:007:35:201
601122991811,3cyclictest750975-21kworker/u8:0+events_unbound10:00:121
601119991815,2cyclictest730349-21sh09:15:010
601119991815,2cyclictest0-21swapper/007:20:000
601119991814,3cyclictest830305-21kworker/u8:2+events_unbound10:56:130
601119991814,3cyclictest252-21systemd-journal12:09:010
601119991813,4cyclictest252-21systemd-journal10:15:120
601129991711,4cyclictest252-21systemd-journal08:38:263
601126991714,2cyclictest841076-21irqcore11:00:152
601126991713,3cyclictest830091-21kworker/u8:1+events_unbound11:35:222
601126991713,3cyclictest740863-21kworker/u8:1+flush-259:009:25:182
601122991714,2cyclictest793583-21kworker/u8:5+events_unbound10:15:221
601122991711,2cyclictest601108-21kworker/u8:1+events_unbound08:40:001
60112999169,5cyclictest938878-21latency_hist12:35:013
601126991612,3cyclictest601108-21kworker/u8:1+flush-259:008:15:232
601122991613,2cyclictest798995-21kworker/u8:0+events_unbound10:25:071
601119991614,1cyclictest60350irq/132-enp0s29f1:rx-009:51:270
601119991613,2cyclictest815316-21irqcore10:35:160
601119991612,3cyclictest601108-21kworker/u8:1+flush-259:007:35:220
60112999159,4cyclictest252-21systemd-journal11:15:013
60112999158,5cyclictest252-21systemd-journal10:58:593
601129991513,1cyclictest2246241-21kworker/3:3+pm12:03:273
601129991510,3cyclictest0-21swapper/312:10:003
601126991511,3cyclictest897341-21kworker/u8:4+flush-259:011:55:242
601126991511,3cyclictest601108-21kworker/u8:1+flush-259:007:10:162
601119991513,2cyclictest653083-21kworker/u8:0+events_unbound09:00:020
601119991512,2cyclictest60350irq/132-enp0s29f1:rx-007:50:180
60112999149,3cyclictest643367-21apt-get07:50:143
60112999148,4cyclictest252-21systemd-journal11:53:133
60112999148,4cyclictest252-21systemd-journal07:12:143
601129991411,2cyclictest685322-21kthreadcore08:30:183
601129991411,2cyclictest673237-21unixbench_multi08:15:243
601129991410,3cyclictest809415-21cpuspeed_turbos10:30:133
601129991410,2cyclictest0-21swapper/309:00:003
60112699149,4cyclictest750975-21kworker/u8:0+events_unbound10:00:212
60112699148,4cyclictest689622-21diskstats08:35:142
601126991410,3cyclictest762332-21kworker/u8:4+flush-259:010:40:262
601126991410,3cyclictest540443-21kworker/u8:5+flush-259:007:50:202
601122991411,2cyclictest653083-21kworker/u8:0+events_unbound08:24:551
601119991412,1cyclictest60350irq/132-enp0s29f1:rx-010:20:070
601119991412,1cyclictest60350irq/132-enp0s29f1:rx-010:05:190
601119991411,2cyclictest60350irq/132-enp0s29f1:rx-008:10:180
601119991411,2cyclictest60350irq/132-enp0s29f1:rx-008:10:180
601119991410,3cyclictest897341-21kworker/u8:4+events_unbound12:35:110
60112999139,3cyclictest663825-21fschecks_count08:10:143
60112999139,3cyclictest663825-21fschecks_count08:10:133
60112999139,2cyclictest825197-21apt-get10:45:113
60112999139,2cyclictest0-21swapper/308:45:123
60112999137,4cyclictest855932-21kworker/u8:0+flush-259:011:55:173
60112699139,3cyclictest601108-21kworker/u8:1+events_unbound09:10:152
60112699137,4cyclictest252-21systemd-journal09:35:012
601119991311,1cyclictest60350irq/132-enp0s29f1:rx-008:30:180
60112999129,2cyclictest871749-21cpuspeed_turbos11:30:123
60112999129,2cyclictest768018-21cpuspeed_turbos09:50:123
60112999129,2cyclictest725879-21sed09:10:153
60112999129,2cyclictest0-21swapper/312:29:593
60112999129,2cyclictest0-21swapper/308:45:003
60112999128,3cyclictest738044-21kthreadcore09:20:173
60112999127,3cyclictest891948-21cron11:50:003
60112999121,9cyclictest725186-21awk09:10:013
60112699129,2cyclictest762332-21kworker/u8:4+flush-259:010:35:242
60112699129,2cyclictest732860-21kthreadcore09:15:192
60112699128,3cyclictest787961-21unixbench_singl10:05:232
60112699128,3cyclictest714940-21kworker/u8:2+flush-259:009:05:262
60112699128,3cyclictest601108-21kworker/u8:1+flush-259:008:20:192
60111999129,2cyclictest60350irq/132-enp0s29f1:rx-007:30:010
60112999118,1cyclictest0-21swapper/312:20:133
60112999117,3cyclictest922361-21cut12:15:193
60112699118,2cyclictest0-21swapper/208:30:202
60112699118,1cyclictest0-21swapper/208:45:002
60112699117,3cyclictest830091-21kworker/u8:1+events_unbound11:20:232
60112999104,4cyclictest252-21systemd-journal09:20:003
60112999100,8cyclictest709950-21cat08:55:013
60112699107,2cyclictest401ktimers/211:05:212
60112699105,3cyclictest896197-21awk11:50:202
60112699100,8cyclictest803919-21awk10:24:592
6011269996,2cyclictest934464-21irqcore12:30:162
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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