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2026-08-23 - 21:40

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 Sun Aug 23, 2026 12:44:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3521741995653,2cyclictest3489237-21kworker/u8:1+events_unbound08:10:121
3521739994741,4cyclictest3668427-21apt-get09:30:120
3521744994540,4cyclictest3563110-21kworker/u8:0+events_unbound08:07:192
3521741994441,2cyclictest3583915-21kworker/u8:4+flush-259:008:15:251
3521744994035,2cyclictest3814569-21systemd11:50:002
3521748993934,4cyclictest3558328-21latency_hist07:45:003
3521739993932,5cyclictest3762559-21latency_hist11:00:010
3521748993835,2cyclictest3614878-21kworker/u8:3+flush-259:010:50:003
3521739993832,4cyclictest3563752-21apt-get07:50:110
3521739993831,5cyclictest3657811-21latency_hist09:20:000
3521741993733,3cyclictest3815034-21kworker/u8:3+events_unbound12:05:131
3521748993632,3cyclictest3820219-21kworker/u8:0+events_unbound12:00:163
3521741993633,2cyclictest3767759-21kworker/u8:4+flush-259:011:45:261
3521739993632,3cyclictest3835772-21kworker/u8:4+flush-259:012:10:250
3521741993532,2cyclictest3673999-21kworker/u8:4+flush-259:010:00:201
3521739993530,3cyclictest3631765-21apt-get08:55:110
3521739993528,5cyclictest3809225-21latency_hist11:45:000
3521744993329,3cyclictest3752461-21apt-get10:50:132
3521744993328,3cyclictest3614878-21kworker/u8:3+flush-259:010:35:172
3521741993330,2cyclictest3521589-21kworker/u8:3+flush-259:007:30:261
3521739993326,5cyclictest3814409-21kworker/u8:2+flush-259:012:20:170
3521739993326,5cyclictest3814409-21kworker/u8:2+flush-259:012:20:160
3521748993229,2cyclictest3705296-21kworker/u8:0+flush-259:010:50:263
3521744993226,4cyclictest3699884-21cp10:00:002
3521741993228,3cyclictest3568952-21apt-get07:55:131
3521739993225,5cyclictest335557-21systemd-journal09:30:000
3521748993126,4cyclictest3830622-21apt-get12:05:123
3521741993128,2cyclictest3625923-21kworker/u8:1+flush-259:008:55:241
3521741993027,2cyclictest3767759-21kworker/u8:4+events_unbound11:40:111
3521741993027,2cyclictest3614878-21kworker/u8:3+flush-259:008:50:011
3521741993026,3cyclictest3815034-21kworker/u8:3+events_unbound12:30:191
3521741993021,2cyclictest3614878-21kworker/u8:3+events_unbound10:15:251
3521739993023,5cyclictest3531651-21ntpq07:15:240
3521744992926,2cyclictest3605020-21kworker/u8:2+flush-259:008:50:112
3521741992926,2cyclictest3605020-21kworker/u8:2+flush-259:008:40:201
3521748992826,2cyclictest3814409-21kworker/u8:2+flush-259:011:50:143
3521748992823,3cyclictest335557-21systemd-journal12:37:143
3521744992824,3cyclictest3521589-21kworker/u8:3+flush-259:007:20:142
3521739992823,3cyclictest3684391-21apt-get09:45:130
3521739992823,3cyclictest3521589-21kworker/u8:3+flush-259:007:40:150
3521748992724,2cyclictest3521589-21kworker/u8:3+flush-259:007:35:253
3521748992723,3cyclictest3705296-21kworker/u8:0+events_unbound11:11:123
3521748992723,3cyclictest3605020-21kworker/u8:2+flush-259:008:50:243
3521748992723,3cyclictest3583915-21kworker/u8:4+events_unbound08:14:263
3521748992723,3cyclictest3563110-21kworker/u8:0+events_unbound07:54:123
3521748992723,3cyclictest3563110-21kworker/u8:0+events_unbound07:48:133
3521744992723,3cyclictest3673999-21kworker/u8:4+flush-259:009:40:232
3521741992724,2cyclictest3631131-21kworker/u8:4+flush-259:009:00:211
3521741992724,2cyclictest3614878-21kworker/u8:3+events_unbound09:39:121
3521741992724,2cyclictest3614878-21kworker/u8:3+events_unbound09:15:211
3521739992722,3cyclictest3537888-21apt-get07:25:120
3521748992622,3cyclictest3804094-21kworker/u8:2+events_unbound11:42:123
3521748992622,3cyclictest3614878-21kworker/u8:3+flush-259:010:25:253
3521748992621,3cyclictest335557-21systemd-journal10:10:113
3521744992621,3cyclictest3614878-21kworker/u8:3+events_unbound09:45:192
3521744992620,4cyclictest335557-21systemd-journal12:29:142
3521741992623,2cyclictest3705296-21kworker/u8:0+events_unbound10:45:121
3521741992622,3cyclictest3783551-21/usr/sbin/munin11:20:151
3521741992621,4cyclictest3548223-21apt-get07:35:111
3521739992619,5cyclictest3772949-21latency_hist11:10:010
3521748992522,2cyclictest3815034-21kworker/u8:3+events_unbound12:34:153
3521748992520,4cyclictest3584154-21latency_hist08:10:003
3521741992522,2cyclictest3705296-21kworker/u8:0+flush-259:010:55:161
3521741992520,3cyclictest3599639-21latency_hist08:25:011
3521739992519,4cyclictest509-21rs:main0
352173999250,23cyclictest1-21systemd10:36:110
3521748992421,2cyclictest3511492-21kworker/u8:0+flush-259:007:10:243
3521741992421,2cyclictest3767759-21kworker/u8:4+events_unbound11:35:211
3521741992421,2cyclictest3625923-21kworker/u8:1+events_unbound09:09:121
3521741992421,2cyclictest3521589-21kworker/u8:3+flush-259:007:25:131
3521741992421,2cyclictest3521589-21kworker/u8:3+events_unbound08:05:181
3521741992421,2cyclictest3489237-21kworker/u8:1+events_unbound07:22:121
3521739992418,4cyclictest3651741-21ntpq09:10:220
3521748992320,2cyclictest3815034-21kworker/u8:3+events_unbound12:14:133
3521748992319,3cyclictest3705296-21kworker/u8:0+events_unbound10:22:123
3521748992319,3cyclictest3673999-21kworker/u8:4+events_unbound10:02:133
3521748992319,3cyclictest3489237-21kworker/u8:1+events_unbound08:15:123
3521748992319,2cyclictest3489237-21kworker/u8:1+flush-259:008:00:113
3521744992318,3cyclictest3532516-21kworker/u8:2+events_unbound07:45:202
3521741992321,2cyclictest3767759-21kworker/u8:4+events_unbound11:55:111
3521741992320,2cyclictest3673999-21kworker/u8:4+events_unbound10:09:521
3521741992320,2cyclictest3614878-21kworker/u8:3+events_unbound10:20:151
3521741992320,2cyclictest3614878-21kworker/u8:3+events_unbound09:30:161
3521741992319,3cyclictest3851124-21kworker/u8:0+events_unbound12:35:111
3521741992319,3cyclictest3614878-21kworker/u8:3+flush-259:009:45:201
3521739992320,2cyclictest3594750-21apt-get08:20:120
3521739992317,4cyclictest3793701-21latency_hist11:30:020
3521748992219,2cyclictest3767759-21kworker/u8:4+events_unbound11:55:123
3521748992219,2cyclictest3589370-21kworker/u8:0+events_unbound08:30:113
3521748992219,2cyclictest3489237-21kworker/u8:1+events_unbound07:34:173
3521748992218,3cyclictest3705296-21kworker/u8:0+flush-259:010:55:213
3521744992219,2cyclictest3835525-21cron12:10:002
3521744992218,3cyclictest3705296-21kworker/u8:0+flush-259:010:45:212
3521744992214,6cyclictest335557-21systemd-journal11:10:002
3521741992218,3cyclictest3614878-21kworker/u8:3+flush-259:009:10:251
3521741992217,3cyclictest3856258-21latency_hist12:30:001
3521741992217,3cyclictest3768010-21apt-get11:05:121
3521739992217,4cyclictest335557-21systemd-journal07:49:190
3521739992217,3cyclictest3773220-21apt-get11:10:130
3521748992118,2cyclictest3673999-21kworker/u8:4+flush-259:009:40:153
3521748992117,3cyclictest3767759-21kworker/u8:4+events_unbound11:38:123
3521748992117,3cyclictest3705296-21kworker/u8:0+events_unbound11:00:223
3521744992118,2cyclictest3614878-21kworker/u8:3+flush-259:010:20:162
3521744992117,3cyclictest3521589-21kworker/u8:3+flush-259:007:10:162
3521741992118,2cyclictest3767759-21kworker/u8:4+flush-259:011:30:191
3521741992117,3cyclictest3752215-21kworker/u8:2+flush-259:011:10:161
3521741992117,3cyclictest3511492-21kworker/u8:0+flush-259:007:10:251
3521741992116,2cyclictest3489237-21kworker/u8:1+events_unbound08:25:211
3521748992017,3cyclictest3631131-21kworker/u8:4+events_unbound08:59:113
3521748992017,2cyclictest3605020-21kworker/u8:2+events_unbound08:39:133
3521748992015,4cyclictest335557-21systemd-journal09:50:003
3521744992017,2cyclictest3814409-21kworker/u8:2+events_unbound12:20:232
3521744992017,2cyclictest3814409-21kworker/u8:2+events_unbound12:20:222
3521741992017,2cyclictest3647660-21kworker/u8:2+events_unbound09:25:211
3521741992017,1cyclictest0-21swapper/109:25:001
3521741992016,3cyclictest3614878-21kworker/u8:3+flush-259:010:35:211
3521739992017,2cyclictest3609989-21sh08:35:010
3521748991916,2cyclictest3752214-21kworker/u8:1+flush-259:011:25:013
3521744991916,2cyclictest3631131-21kworker/u8:4+flush-259:009:00:162
3521744991916,2cyclictest0-21swapper/207:20:002
3521741991913,4cyclictest3742151-21apt-get10:40:121
3521739991915,3cyclictest3825411-21kworker/u8:1+flush-259:012:10:000
3521739991914,4cyclictest335557-21systemd-journal09:08:110
3521739991913,4cyclictest3615105-21cron08:40:010
3521739991913,4cyclictest3521957-21apt-get07:10:120
3521748991815,2cyclictest3815034-21kworker/u8:3+flush-259:012:15:193
3521748991815,2cyclictest3705296-21kworker/u8:0+events_unbound10:39:123
3521748991815,2cyclictest3625923-21kworker/u8:1+flush-259:009:05:213
3521748991814,3cyclictest3767759-21kworker/u8:4+events_unbound11:30:213
3521748991814,3cyclictest3705296-21kworker/u8:0+events_unbound11:15:113
3521748991814,3cyclictest3614878-21kworker/u8:3+events_unbound09:55:173
3521744991815,2cyclictest3815034-21kworker/u8:3+flush-259:012:15:002
3521744991814,3cyclictest3705296-21kworker/u8:0+events_unbound10:40:232
3521744991814,3cyclictest3631131-21kworker/u8:4+events_unbound08:55:232
3521741991816,1cyclictest3614878-21kworker/u8:3+events_unbound10:25:201
3521741991815,2cyclictest3705296-21kworker/u8:0+flush-259:011:15:271
3521741991815,1cyclictest0-21swapper/109:45:001
3521741991814,3cyclictest3705296-21kworker/u8:0+events_unbound11:01:031
3521741991812,4cyclictest3851112-21latency_hist12:25:001
3521741991812,4cyclictest3851112-21latency_hist12:25:001
3521739991812,4cyclictest335557-21systemd-journal09:24:590
3521739991811,5cyclictest3630196-21ntpq08:50:210
3521739991811,5cyclictest335557-21systemd-journal07:24:590
3521748991714,2cyclictest3851124-21kworker/u8:0+flush-259:012:25:253
3521748991714,2cyclictest3614878-21kworker/u8:3+flush-259:009:15:253
3521748991713,3cyclictest3614878-21kworker/u8:3+events_unbound09:10:243
3521748991712,3cyclictest335557-21systemd-journal11:46:133
3521744991714,2cyclictest3705296-21kworker/u8:0+flush-259:011:00:162
3521744991713,3cyclictest3489237-21kworker/u8:1+flush-259:007:25:152
3521744991712,3cyclictest3647660-21kworker/u8:2+events_unbound09:13:122
3521741991715,1cyclictest0-21swapper/107:20:001
3521741991714,2cyclictest3614878-21kworker/u8:3+events_unbound09:59:111
3521741991714,2cyclictest3605020-21kworker/u8:2+events_unbound08:35:181
3521741991714,2cyclictest3589370-21kworker/u8:0+events_unbound08:30:181
3521741991711,4cyclictest3815014-21cp11:50:011
352173999179,5cyclictest3803169-21ntpq11:35:200
3521739991714,2cyclictest60350irq/132-enp0s29f1:rx-010:15:150
3521739991713,3cyclictest3851124-21kworker/u8:0+flush-259:012:35:110
3521739991713,2cyclictest0-21swapper/010:00:000
3521748991614,1cyclictest0-21swapper/309:30:003
3521748991613,2cyclictest3631131-21kworker/u8:4+events_unbound09:00:233
3521748991613,2cyclictest3625923-21kworker/u8:1+events_unbound09:31:003
3521748991613,2cyclictest3521589-21kworker/u8:3+events_unbound07:25:133
3521748991612,3cyclictest3489237-21kworker/u8:1+events_unbound07:15:193
3521744991613,2cyclictest3767759-21kworker/u8:4+flush-259:011:25:212
3521744991613,2cyclictest3583915-21kworker/u8:4+flush-259:008:20:162
3521744991612,3cyclictest3489237-21kworker/u8:1+flush-259:008:00:252
3521741991613,2cyclictest3705296-21kworker/u8:0+events_unbound10:50:121
3521741991613,2cyclictest3614878-21kworker/u8:3+events_unbound10:30:141
3521741991612,3cyclictest3835805-21apt-get12:10:111
3521741991612,3cyclictest3673999-21kworker/u8:4+events_unbound10:11:551
3521741991612,3cyclictest3489237-21kworker/u8:1+events_unbound08:01:561
3521739991614,1cyclictest60350irq/132-enp0s29f1:rx-007:58:350
3521739991613,2cyclictest60350irq/132-enp0s29f1:rx-011:52:110
3521739991612,2cyclictest60350irq/132-enp0s29f1:rx-011:30:170
3521748991513,2cyclictest3614878-21kworker/u8:3+events_unbound08:45:273
3521748991512,2cyclictest3814409-21kworker/u8:2+flush-259:012:20:153
3521748991512,2cyclictest3814409-21kworker/u8:2+flush-259:012:20:153
3521748991511,3cyclictest3705296-21kworker/u8:0+events_unbound11:25:203
3521748991511,3cyclictest3673999-21kworker/u8:4+flush-259:010:05:253
3521744991512,2cyclictest3673999-21kworker/u8:4+flush-259:009:50:162
3521744991512,2cyclictest3614878-21kworker/u8:3+flush-259:010:25:212
3521744991512,2cyclictest3605020-21kworker/u8:2+events_unbound08:35:242
3521744991512,2cyclictest3521589-21kworker/u8:3+flush-259:007:40:152
3521744991512,2cyclictest0-21swapper/211:00:002
3521744991511,3cyclictest3673999-21kworker/u8:4+events_unbound09:39:442
3521744991511,3cyclictest3625923-21kworker/u8:1+events_unbound09:31:022
3521744991511,3cyclictest3589370-21kworker/u8:0+events_unbound08:30:162
3521744991510,3cyclictest3620296-21apt-get08:45:012
352174499150,8cyclictest3720825-21munin-run10:20:002
3521741991512,2cyclictest3814409-21kworker/u8:2+events_unbound12:19:561
3521741991511,3cyclictest3767759-21kworker/u8:4+events_unbound11:27:111
3521739991513,1cyclictest60350irq/132-enp0s29f1:rx-012:30:160
3521739991513,1cyclictest60350irq/132-enp0s29f1:rx-011:00:160
3521739991513,1cyclictest60350irq/132-enp0s29f1:rx-010:20:250
3521739991513,1cyclictest60350irq/132-enp0s29f1:rx-009:44:010
3521739991513,1cyclictest60350irq/132-enp0s29f1:rx-008:00:220
3521739991512,2cyclictest60350irq/132-enp0s29f1:rx-012:18:580
3521739991512,2cyclictest60350irq/132-enp0s29f1:rx-010:05:260
3521739991512,2cyclictest60350irq/132-enp0s29f1:rx-008:10:150
3521748991410,3cyclictest3614878-21kworker/u8:3+events_unbound10:30:123
3521748991410,3cyclictest335557-21systemd-journal10:19:553
352174499149,4cyclictest335557-21systemd-journal11:33:112
352174499149,3cyclictest3673999-21kworker/u8:4+events_unbound10:05:182
3521744991411,2cyclictest3563110-21kworker/u8:0+flush-259:007:50:202
3521744991410,3cyclictest3673999-21kworker/u8:4+events_unbound10:11:112
352174199149,4cyclictest3589370-21kworker/u8:0+events_unbound08:54:111
352173999149,4cyclictest0-21swapper/010:30:120
3521739991412,1cyclictest60350irq/132-enp0s29f1:rx-010:00:140
3521739991412,1cyclictest60350irq/132-enp0s29f1:rx-008:45:150
3521739991412,1cyclictest60350irq/132-enp0s29f1:rx-008:05:160
3521739991411,2cyclictest60350irq/132-enp0s29f1:rx-009:50:390
3521739991410,3cyclictest3714755-21ntp_kernel_pll_10:10:210
3521748991310,2cyclictest3674131-21cpuspeed_turbos09:35:143
352174499139,3cyclictest3815034-21kworker/u8:3+events_unbound12:30:232
3521744991310,3cyclictest3752215-21kworker/u8:2+flush-259:011:10:252
3521744991310,2cyclictest3705296-21kworker/u8:0+flush-259:011:20:222
3521744991310,2cyclictest3673999-21kworker/u8:4+events_unbound10:00:142
352174199139,3cyclictest3614878-21kworker/u8:3+events_unbound09:54:241
3521739991311,1cyclictest60350irq/132-enp0s29f1:rx-011:45:180
3521739991311,1cyclictest60350irq/132-enp0s29f1:rx-010:45:150
3521739991310,2cyclictest60350irq/132-enp0s29f1:rx-009:35:220
3521739991310,2cyclictest60350irq/132-enp0s29f1:rx-009:00:250
352174899129,2cyclictest3705296-21kworker/u8:0+events_unbound10:40:153
352174899128,3cyclictest3489237-21kworker/u8:1+events_unbound08:25:233
3521748991210,1cyclictest0-21swapper/311:10:003
3521748991210,1cyclictest0-21swapper/307:59:593
352174499129,2cyclictest3851124-21kworker/u8:0+events_unbound12:35:172
352174499129,2cyclictest3808814-21unixbench_singl11:40:252
352174499129,2cyclictest3767759-21kworker/u8:4+flush-259:011:35:142
352174499127,3cyclictest3583915-21kworker/u8:4+flush-259:008:15:012
3521744991210,1cyclictest3563110-21kworker/u8:0+events_unbound07:55:132
3521739991210,2cyclictest61150irq/133-enp0s29f1:tx-011:15:210
352174899118,2cyclictest3537166-21unixbench_multi07:20:273
352174899118,1cyclictest0-21swapper/309:50:193
352174499119,1cyclictest3489237-21kworker/u8:1+events_unbound07:35:152
352174499117,3cyclictest3705296-21kworker/u8:0+events_unbound10:34:562
352174499107,2cyclictest3647660-21kworker/u8:2+events_unbound09:25:102
352174499106,3cyclictest3815034-21kworker/u8:3+flush-259:012:03:172
352174499106,2cyclictest3646533-21ntpq09:05:222
35217489996,2cyclictest0-21swapper/308:20:233
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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