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2026-07-09 - 07:35

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 792 highest latencies:
System rackeslot4s.osadl.org (updated Thu Jul 09, 2026 00:44:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3217610995144,5cyclictest3520297-21latency_hist00:00:000
3217610994742,4cyclictest3310722-21kworker/u8:3+flush-259:021:15:010
3217615994235,5cyclictest3405385-21gpgv22:10:001
3217610994239,2cyclictest3289880-21kworker/u8:0+flush-259:020:20:150
3217610994138,2cyclictest3368732-21kworker/u8:2+events_unbound22:10:010
3217615993830,5cyclictest3452505-21latency_hist22:55:011
3217617993528,5cyclictest3416015-21latency_hist22:20:012
3217610993532,2cyclictest3473308-21kworker/u8:3+flush-259:023:30:010
3217610993531,3cyclictest3494327-21kworker/u8:4+events_unbound00:00:210
3217610993530,4cyclictest3337599-21/usr/sbin/munin21:05:130
3217610993431,2cyclictest3342552-21kworker/u8:0+flush-259:023:00:250
3217610993430,3cyclictest3342552-21kworker/u8:0+flush-259:023:15:170
3217610993426,5cyclictest335557-21systemd-journal22:55:160
3217610993227,3cyclictest3494327-21kworker/u8:4+events_unbound23:35:230
3217620993124,5cyclictest3269558-21latency_hist20:00:003
3217610993127,3cyclictest3238459-21kworker/u8:2+flush-259:019:50:230
3217617993023,5cyclictest3529674-21ntpq00:05:202
3217610993027,2cyclictest3238459-21kworker/u8:2+events_unbound19:49:590
3217610992922,5cyclictest335557-21systemd-journal00:10:000
3217615992825,2cyclictest3358623-21kworker/u8:1+flush-259:021:40:001
3217610992823,3cyclictest3368732-21kworker/u8:2+events_unbound22:37:150
3217610992823,3cyclictest3342552-21kworker/u8:0+flush-259:022:50:160
3217610992821,5cyclictest335557-21systemd-journal20:10:010
3217620992724,2cyclictest3368732-21kworker/u8:2+flush-259:021:50:003
3217620992720,4cyclictest3274710-21latency_hist20:05:013
3217617992723,3cyclictest3289880-21kworker/u8:0+flush-259:020:25:012
3217610992724,2cyclictest3248591-21kworker/u8:3+flush-259:019:55:180
3217610992723,3cyclictest3342552-21kworker/u8:0+events_unbound22:15:120
3217620992619,5cyclictest335557-21systemd-journal19:39:593
3217617992622,3cyclictest3467939-21kworker/u8:1+flush-259:023:15:012
3217615992621,4cyclictest335557-21systemd-journal23:40:151
3217610992622,3cyclictest3368732-21kworker/u8:2+flush-259:022:10:200
3217610992622,3cyclictest3228000-21kworker/u8:0+flush-259:019:20:210
3217610992619,5cyclictest335557-21systemd-journal22:32:160
3217610992619,5cyclictest335557-21systemd-journal22:32:160
3217617992519,4cyclictest3405273-21apt-get22:10:012
3217615992521,3cyclictest3289880-21kworker/u8:0+events_unbound20:40:011
3217615992520,3cyclictest3457618-21latency_hist23:00:011
3217610992522,2cyclictest3482983-21kworker/u8:1+flush-259:023:40:190
3217610992522,2cyclictest3368732-21kworker/u8:2+flush-259:022:40:210
3217610992521,3cyclictest3310722-21kworker/u8:3+events_unbound21:25:000
3217610992517,3cyclictest3238459-21kworker/u8:2+events_unbound20:50:010
3217615992420,3cyclictest3368732-21kworker/u8:2+flush-259:022:25:001
3217615992418,4cyclictest3431044-21ntpq22:30:231
3217615992418,4cyclictest3431044-21ntpq22:30:221
3217610992421,2cyclictest3520331-21kworker/u8:1+events_unbound00:35:180
3217610992421,2cyclictest2624217-21kworker/u8:4+flush-259:019:17:150
3217610992420,3cyclictest3374085-21kworker/u8:3+events_unbound21:40:210
3217620992318,4cyclictest3374085-21kworker/u8:3+flush-259:022:00:003
3217620992317,5cyclictest335557-21systemd-journal21:54:593
3217617992319,3cyclictest3368732-21kworker/u8:2+flush-259:023:20:152
3217610992320,2cyclictest3228000-21kworker/u8:0+events_unbound19:35:250
3217610992319,3cyclictest3289880-21kworker/u8:0+events_unbound20:25:100
3217610992317,4cyclictest335557-21systemd-journal23:45:150
3217620992218,3cyclictest3238459-21kworker/u8:2+flush-259:019:54:593
3217617992218,3cyclictest3530585-21kworker/u8:2+flush-259:000:20:002
3217617992218,3cyclictest3238459-21kworker/u8:2+flush-259:020:55:202
3217617992218,3cyclictest3238459-21kworker/u8:2+flush-259:019:45:212
3217610992219,2cyclictest3473308-21kworker/u8:3+flush-259:023:30:220
3217610992217,3cyclictest3300715-21/usr/sbin/munin20:30:150
3217620992115,4cyclictest3269568-21kworker/u8:1+flush-259:020:05:163
3217620992114,5cyclictest3436088-21ntpq22:35:203
3217617992117,3cyclictest3259537-21apt-get19:50:102
321761799211,18cyclictest3342554-21unin-run21:10:012
3217615992117,3cyclictest3368732-21kworker/u8:2+flush-259:021:50:231
3217615992117,3cyclictest335557-21systemd-journal00:28:221
3217610992118,2cyclictest3520331-21kworker/u8:1+events_unbound00:30:210
3217610992117,3cyclictest507-21in:imuxsock21:30:010
3217610992117,3cyclictest3520331-21kworker/u8:1+events_unbound00:20:230
3217610992117,3cyclictest3510233-21kworker/u8:2+flush-259:023:50:240
3217610992114,5cyclictest3482445-21ntpq23:20:200
321761099210,19cyclictest1-21systemd20:38:140
3217620992016,3cyclictest3456749-21ntp_kernel_pll_22:55:213
3217620992013,5cyclictest3488511-21latency_hist23:30:003
3217617992017,2cyclictest2624217-21kworker/u8:4+events_unbound19:15:012
3217617992017,1cyclictest0-21swapper/222:30:002
3217617992014,5cyclictest3509753-21cat23:50:012
3217617992014,4cyclictest3310834-21cp20:40:012
3217615992017,2cyclictest3520331-21kworker/u8:1+flush-259:000:40:001
3217615992017,2cyclictest3342552-21kworker/u8:0+flush-259:021:30:011
3217615992017,2cyclictest3310722-21kworker/u8:3+events_unbound21:05:191
3217615992016,3cyclictest3493670-21apt-get23:35:011
3217615992016,3cyclictest3269568-21kworker/u8:1+flush-259:020:35:201
3217610992017,2cyclictest3238459-21kworker/u8:2+events_unbound20:15:140
3217610992016,3cyclictest3342552-21kworker/u8:0+events_unbound22:20:120
3217610992016,3cyclictest3248591-21kworker/u8:3+flush-259:020:05:000
3217610992015,4cyclictest3384865-21apt-get21:50:120
3217610992014,4cyclictest335557-21systemd-journal22:29:150
3217610992014,2cyclictest3289880-21kworker/u8:0+events_unbound20:40:190
3217620991915,3cyclictest1-21systemd21:05:003
3217617991913,4cyclictest3300478-21latency_hist20:30:002
3217615991916,2cyclictest3310722-21kworker/u8:3+flush-259:020:50:161
3217610991915,3cyclictest3248591-21kworker/u8:3+flush-259:020:10:160
3217610991915,3cyclictest3248591-21kworker/u8:3+flush-259:020:10:150
3217620991813,4cyclictest3238459-21kworker/u8:2+flush-259:019:40:183
3217620991811,5cyclictest3458042-21diskstats23:00:143
321762099181,15cyclictest3416066-21munin-run22:20:013
3217617991815,2cyclictest3520331-21kworker/u8:1+flush-259:000:10:152
3217617991815,2cyclictest3332443-21irqcore21:00:172
3217617991814,3cyclictest3238459-21kworker/u8:2+flush-259:019:40:162
3217615991815,2cyclictest3342552-21kworker/u8:0+flush-259:023:20:201
3217615991813,4cyclictest3284074-21ntpq20:10:211
3217615991813,4cyclictest3284074-21ntpq20:10:201
3217615991812,4cyclictest335557-21systemd-journal19:45:001
3217615991811,5cyclictest335557-21systemd-journal20:04:151
3217610991815,2cyclictest3368732-21kworker/u8:2+flush-259:022:45:160
3217610991813,3cyclictest60350irq/132-enp0s29f1:rx-020:50:200
3217610991813,3cyclictest3238459-21kworker/u8:2+flush-259:021:00:010
3217620991713,2cyclictest0-21swapper/321:30:003
3217620991712,4cyclictest3494327-21kworker/u8:4+flush-259:000:00:253
3217620991710,5cyclictest3426693-21latency_hist22:30:013
3217617991714,2cyclictest3373843-21idleruntime-cro21:40:002
3217617991713,3cyclictest0-21swapper/223:40:002
3217617991711,4cyclictest3352783-21latency_hist21:20:012
3217615991714,2cyclictest3473308-21kworker/u8:3+flush-259:023:25:201
3217615991714,2cyclictest3275388-21irqcore20:05:161
3217610991714,2cyclictest60350irq/132-enp0s29f1:rx-023:05:150
3217610991714,2cyclictest3494327-21kworker/u8:4+events_unbound00:25:150
3217610991714,2cyclictest3342552-21kworker/u8:0+flush-259:021:15:240
3217620991614,1cyclictest0-21swapper/321:25:013
3217620991613,2cyclictest3255017-21kthreadcore19:45:163
3217617991614,1cyclictest3462807-21idleruntime-cro23:05:002
3217617991613,2cyclictest3233768-21irqcore19:25:152
3217617991613,2cyclictest0-21swapper/220:15:012
3217617991613,2cyclictest0-21swapper/220:15:002
3217617991612,3cyclictest3494327-21kworker/u8:4+flush-259:000:00:062
3217617991612,3cyclictest3342552-21kworker/u8:0+flush-259:021:20:202
3217617991610,4cyclictest335557-21systemd-journal00:25:002
3217615991614,1cyclictest3248599-21systemd-run19:40:001
3217615991613,2cyclictest3520331-21kworker/u8:1+flush-259:000:10:151
3217615991612,3cyclictest3368732-21kworker/u8:2+flush-259:022:40:161
3217615991611,4cyclictest3510266-21apt-get23:50:111
3217610991613,2cyclictest60350irq/132-enp0s29f1:rx-021:55:170
3217610991613,2cyclictest60350irq/132-enp0s29f1:rx-019:33:220
3217610991612,3cyclictest3310722-21kworker/u8:3+events_unbound21:00:120
3217610991610,4cyclictest3539942-21ntpq00:15:180
321762099158,5cyclictest335557-21systemd-journal22:05:003
3217620991511,3cyclictest3228000-21kworker/u8:0+flush-259:019:30:103
3217620991510,4cyclictest3289880-21kworker/u8:0+flush-259:020:30:163
3217617991512,2cyclictest3264674-21apt-get19:55:102
3217617991512,2cyclictest0-21swapper/220:05:012
3217615991512,2cyclictest3342552-21kworker/u8:0+flush-259:021:15:211
3217615991512,2cyclictest3217791-21kworker/u8:3+flush-259:019:10:201
3217615991511,3cyclictest3269568-21kworker/u8:1+flush-259:020:15:271
3217610991513,1cyclictest60350irq/132-enp0s29f1:rx-019:10:250
3217610991512,2cyclictest60350irq/132-enp0s29f1:rx-021:35:150
3217610991512,2cyclictest60350irq/132-enp0s29f1:rx-019:42:570
321762099141,4cyclictest3556332-21awk00:35:003
3217620991412,1cyclictest3346832-21ntp_kernel_pll_21:10:213
3217620991410,3cyclictest3342552-21kworker/u8:0+flush-259:022:50:263
3217620991410,3cyclictest3295324-21cron20:25:003
3217617991412,1cyclictest0-21swapper/221:25:152
3217617991411,2cyclictest3346714-21needreboot21:10:192
3217617991411,2cyclictest3311831-21irqcore20:40:142
3217617991411,2cyclictest3244072-21irqcore19:35:132
3217617991411,2cyclictest2624217-21kworker/u8:4+events_unbound19:20:012
3217617991410,3cyclictest3269568-21kworker/u8:1+flush-259:020:05:202
3217615991411,2cyclictest3342552-21kworker/u8:0+flush-259:023:05:201
3217615991411,2cyclictest3259946-21irqcore19:50:151
3217610991412,1cyclictest60350irq/132-enp0s29f1:rx-022:02:320
3217610991411,2cyclictest60350irq/132-enp0s29f1:rx-021:45:190
3217610991410,3cyclictest3342552-21kworker/u8:0+events_unbound21:32:160
321762099139,3cyclictest3488835-21cpuspeed_turbos23:30:133
321762099139,3cyclictest3310722-21kworker/u8:3+flush-259:021:05:243
321762099139,2cyclictest3342552-21kworker/u8:0+flush-259:021:35:163
321762099139,2cyclictest0-21swapper/322:50:003
321762099138,4cyclictest3342552-21kworker/u8:0+flush-259:021:15:183
3217620991311,1cyclictest0-21swapper/321:00:003
3217620991310,2cyclictest0-21swapper/300:25:263
321761799139,3cyclictest3453067-21sshd22:55:152
321761799139,3cyclictest3342552-21kworker/u8:0+flush-259:021:45:012
321761799139,2cyclictest0-21swapper/200:00:002
3217617991310,2cyclictest3342552-21kworker/u8:0+events_unbound21:30:162
3217617991310,1cyclictest0-21swapper/222:45:012
321761599139,3cyclictest3421794-21/usr/sbin/munin22:25:141
321761599138,4cyclictest3374092-21/usr/sbin/munin21:40:141
321761599135,1cyclictest0-21swapper/123:20:011
3217615991311,1cyclictest0-21swapper/119:30:001
3217615991310,2cyclictest3494617-21fschecks_time23:35:131
3217615991310,2cyclictest3384625-21kworker/u8:4+flush-259:021:55:231
3217615991310,2cyclictest3310722-21kworker/u8:3+flush-259:021:10:231
3217610991311,1cyclictest60350irq/132-enp0s29f1:rx-019:27:530
321762099129,2cyclictest3478593-21cpuspeed_turbos23:20:123
321762099129,2cyclictest3300481-21latency_hist20:30:013
321762099129,1cyclictest0-21swapper/322:09:593
321762099128,3cyclictest3463473-21irqcore23:05:173
321762099125,4cyclictest335557-21systemd-journal23:36:353
321762099121,2cyclictest3546046-21awk00:24:593
3217620991210,1cyclictest0-21swapper/320:40:013
3217620991210,1cyclictest0-21swapper/319:24:593
3217620991210,1cyclictest0-21swapper/319:15:003
321761799129,2cyclictest3427026-21cpuspeed_turbos22:30:132
321761799129,2cyclictest3427026-21cpuspeed_turbos22:30:122
321761799128,3cyclictest3316602-21apt-get20:45:112
321761799128,3cyclictest0-21swapper/222:50:202
3217617991210,1cyclictest3421557-21sh22:25:002
3217617991210,1cyclictest0-21swapper/223:35:012
321761799120,3cyclictest32875371kthreadcore20:15:172
321761599129,2cyclictest0-21swapper/100:00:001
321761599128,3cyclictest3520331-21kworker/u8:1+events_unbound00:15:151
321761599128,2cyclictest3368732-21kworker/u8:2+flush-259:022:35:161
321761599120,4cyclictest3553545-21kthreadcore00:30:171
321762099118,2cyclictest3510332-21cpuspeed_turbos23:50:133
321762099118,2cyclictest3441751-21unixbench_singl22:40:263
321762099118,2cyclictest3289118-21needreboot20:15:183
321762099118,2cyclictest3280179-21cpuspeed_turbos20:10:133
321762099118,2cyclictest3280179-21cpuspeed_turbos20:10:123
321762099115,4cyclictest3474365-21grep23:15:183
321761799119,1cyclictest0-21swapper/200:40:002
321761799118,2cyclictest507-21in:imuxsock22:05:002
321761799118,2cyclictest3389309-21unixbench_multi21:50:242
321761799116,3cyclictest3499792-21fschecks_time23:40:152
321761599118,2cyclictest3368682-21idleruntime-cro21:35:011
321761599118,2cyclictest3228625-21grep19:20:151
321761599118,2cyclictest3227954-21sh19:20:011
321761599117,3cyclictest3374085-21kworker/u8:3+flush-259:022:00:591
321761599117,3cyclictest3238459-21kworker/u8:2+flush-259:020:20:251
321761599117,2cyclictest3301760-21kthreadcore20:30:181
321761099118,2cyclictest60350irq/132-enp0s29f1:rx-000:11:480
321762099108,1cyclictest0-21swapper/321:44:593
321762099107,2cyclictest3468244-21cpuspeed_turbos23:10:113
321762099106,3cyclictest3342552-21kworker/u8:0+flush-259:022:32:213
321762099106,3cyclictest3342552-21kworker/u8:0+flush-259:022:32:203
321761799107,2cyclictest0-21swapper/222:40:252
321761599108,1cyclictest3442853-21sed22:45:161
321761599106,3cyclictest3342552-21kworker/u8:0+events_unbound21:45:201
321761599105,3cyclictest490-21dbus-daemon20:30:001
32176159996,1cyclictest0-21swapper/120:50:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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