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2026-06-17 - 21:44

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 Wed Jun 17, 2026 12:44:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3715782995751,4cyclictest3789431-21base6408:20:011
3715785994843,3cyclictest3794953-21gpgv08:25:002
3715780994842,5cyclictest3805580-21latency_hist08:35:010
3715780994236,4cyclictest3950440-21latency_hist10:55:020
3715785994135,4cyclictest3736534-21cat07:30:002
3715780994134,5cyclictest509-21rs:main0
3715780993834,3cyclictest3959856-21kworker/u8:3+flush-259:011:05:150
3715780993832,4cyclictest3997425-21latency_hist11:40:000
3715790993734,2cyclictest3914374-21kworker/u8:0+flush-259:010:25:003
3715780993730,5cyclictest3954742-21ntpq10:55:180
3715780993631,3cyclictest3924674-21kworker/u8:1+flush-259:010:35:000
3715785993528,5cyclictest3753280-21cp07:45:012
3715785993528,5cyclictest3753280-21cp07:45:012
3715785993525,9cyclictest3975860-21kworker/u8:4+flush-259:011:34:592
3715785993327,4cyclictest4038815-21latency_hist12:20:012
3715780993326,5cyclictest335557-21systemd-journal11:51:150
3715785993226,4cyclictest3956076-21diskstats11:00:142
3715780993229,2cyclictest3763623-21kworker/u8:4+flush-259:008:00:210
3715780993226,4cyclictest3795687-21diskstats08:25:150
3715785993121,9cyclictest3816137-21kworker/u8:0+flush-259:009:00:002
3715780993027,2cyclictest3965995-21kworker/u8:0+flush-259:011:10:250
3715790992923,4cyclictest3773739-21latency_hist08:05:013
3715782992925,3cyclictest4028723-21apt-get12:10:091
3715782992925,3cyclictest3853110-21sshd09:20:161
3715790992825,2cyclictest3959856-21kworker/u8:3+flush-259:011:05:003
3715785992823,3cyclictest4028451-21awk12:10:002
3715780992825,2cyclictest3831406-21kworker/u8:2+events_unbound10:00:170
3715780992825,2cyclictest3831406-21kworker/u8:2+events_unbound10:00:170
3715780992824,3cyclictest3924675-21kworker/u8:2+events_unbound10:40:180
3715780992824,3cyclictest3779424-21kworker/u8:1+flush-259:008:45:160
3715790992724,2cyclictest3975860-21kworker/u8:4+flush-259:012:30:143
3715785992722,3cyclictest3975860-21kworker/u8:4+flush-259:012:35:162
3715782992724,2cyclictest3816137-21kworker/u8:0+flush-259:008:50:161
3715780992723,3cyclictest3914374-21kworker/u8:0+flush-259:010:45:230
3715785992622,3cyclictest3883425-21kworker/u8:4+flush-259:010:05:162
3715785992620,5cyclictest3725208-21ntpq07:15:202
3715780992620,4cyclictest3789788-21base6408:20:020
3715780992620,4cyclictest3779424-21kworker/u8:1+flush-259:009:05:170
3715790992522,2cyclictest3862081-21kworker/u8:3+flush-259:009:55:153
3715790992520,4cyclictest3831408-21kworker/u8:4+flush-259:009:10:003
3715790992520,4cyclictest335557-21systemd-journal11:35:173
3715780992522,2cyclictest3677189-21kworker/u8:2+flush-259:007:20:200
3715780992521,3cyclictest3773760-21kworker/u8:0+events_unbound08:15:210
3715780992520,3cyclictest335557-21systemd-journal09:58:160
3715780992517,6cyclictest3836580-21latency_hist09:05:010
3715790992419,4cyclictest3939259-21ntpq10:40:193
3715782992417,5cyclictest3965069-21ntpq11:05:211
3715780992420,3cyclictest4033861-21kworker/u8:3+events_unbound12:22:160
3715780992420,3cyclictest4028227-21kworker/u8:0+events_unbound12:15:180
3715780992420,3cyclictest3831406-21kworker/u8:2+events_unbound09:36:170
3715780992419,3cyclictest3742444-21base6407:35:010
3715790992319,3cyclictest3971772-21/usr/sbin/munin11:15:133
3715782992319,2cyclictest509-21rs:main1
3715780992319,3cyclictest3779424-21kworker/u8:1+events_unbound08:40:230
3715780992319,3cyclictest3773760-21kworker/u8:0+events_unbound08:10:270
3715785992218,3cyclictest3982145-21kworker/u8:1+flush-259:011:25:142
3715785992218,3cyclictest3657272-21kworker/u8:0+flush-259:007:10:172
3715785992217,3cyclictest3795463-21cat08:25:012
3715785992216,4cyclictest3852183-21cat09:20:002
3715780992219,2cyclictest3982145-21kworker/u8:1+events_unbound11:30:140
3715780992218,3cyclictest3975860-21kworker/u8:4+flush-259:012:00:240
3715780992218,3cyclictest3924675-21kworker/u8:2+events_unbound11:23:180
3715780992218,3cyclictest3721132-21kworker/u8:4+flush-259:007:15:180
3715780992217,4cyclictest3862081-21kworker/u8:3+flush-259:010:10:010
3715790992117,3cyclictest3677189-21kworker/u8:2+flush-259:007:25:253
3715790992117,3cyclictest3677189-21kworker/u8:2+flush-259:007:20:213
3715790992116,4cyclictest3789275-21apt-get08:20:013
3715790992115,4cyclictest3778038-21ntpq08:05:233
3715785992118,2cyclictest3831406-21kworker/u8:2+flush-259:010:05:002
3715785992118,2cyclictest3831406-21kworker/u8:2+flush-259:010:05:002
3715782992118,2cyclictest3924674-21kworker/u8:1+flush-259:011:00:241
3715782992118,2cyclictest3831406-21kworker/u8:2+events_unbound09:55:001
3715782992118,2cyclictest3721132-21kworker/u8:4+flush-259:007:20:001
3715782992117,3cyclictest3747749-21apt-get07:40:111
3715780992118,2cyclictest3862081-21kworker/u8:3+events_unbound10:15:200
3715780992118,2cyclictest3862081-21kworker/u8:3+events_unbound09:41:180
3715780992118,2cyclictest3746997-21kworker/u8:2+flush-259:007:45:220
3715780992118,2cyclictest3746997-21kworker/u8:2+flush-259:007:45:220
3715780992117,3cyclictest4033861-21kworker/u8:3+flush-259:012:30:230
3715780992117,3cyclictest3924674-21kworker/u8:1+events_unbound10:35:260
3715780992117,3cyclictest3731464-21apt-get07:25:110
3715780992117,3cyclictest3657272-21kworker/u8:0+events_unbound07:13:260
3715780992114,5cyclictest3923772-21ntpq10:25:210
3715790992017,2cyclictest3721132-21kworker/u8:4+flush-259:007:35:183
3715790992016,3cyclictest3992466-21kworker/u8:3+flush-259:012:05:253
3715790992016,3cyclictest3831406-21kworker/u8:2+flush-259:009:50:003
3715790992016,3cyclictest3831406-21kworker/u8:2+flush-259:009:25:003
3715790992014,4cyclictest3965972-21latency_hist11:10:013
371578599206,6cyclictest3893770-21awk10:00:002
3715785992017,2cyclictest3746998-21kworker/u8:3+flush-259:007:50:232
3715785992016,2cyclictest3909231-21idleruntime-cro10:15:012
3715785992014,4cyclictest3997657-21/usr/sbin/munin11:40:132
3715782992017,2cyclictest3831657-21apt-get09:00:121
3715782992016,3cyclictest3800652-21kworker/u8:3+flush-259:008:30:211
3715780992017,2cyclictest3831406-21kworker/u8:2+flush-259:009:15:150
3715780992016,3cyclictest3975860-21kworker/u8:4+events_unbound11:59:180
3715780992016,3cyclictest3779424-21kworker/u8:1+events_unbound08:35:140
3715790991916,2cyclictest3992466-21kworker/u8:3+flush-259:011:50:213
3715790991916,2cyclictest3795053-21kworker/u8:2+flush-259:008:35:223
3715785991913,4cyclictest3767669-21ntpq07:55:202
3715782991916,2cyclictest335557-21systemd-journal11:25:011
3715782991914,3cyclictest3831389-21latency_hist09:00:011
3715782991914,3cyclictest3746998-21kworker/u8:3+flush-259:007:45:161
3715782991914,3cyclictest3746998-21kworker/u8:3+flush-259:007:45:161
371578299190,2cyclictest3846901-21awk09:14:591
3715780991916,2cyclictest3773968-21kworker/u8:2+events_unbound08:10:000
3715780991915,3cyclictest4033861-21kworker/u8:3+flush-259:012:25:180
3715780991915,3cyclictest3825373-21kworker/u8:3+events_unbound08:55:180
3715780991915,2cyclictest3836806-21kworker/u8:0+events_unbound09:20:180
3715790991815,2cyclictest3720890-21idleruntime-cro07:15:003
3715782991815,2cyclictest3779424-21kworker/u8:1+flush-259:008:40:211
3715782991815,2cyclictest3779424-21kworker/u8:1+flush-259:008:20:171
3715782991814,3cyclictest4033861-21kworker/u8:3+flush-259:012:25:161
3715780991815,2cyclictest3992466-21kworker/u8:3+events_unbound12:05:220
3715780991814,3cyclictest3816137-21kworker/u8:0+events_unbound08:50:110
3715780991812,5cyclictest3986232-21ntpq11:25:190
3715790991715,1cyclictest4002563-21sh11:44:593
3715790991712,2cyclictest3873076-21idleruntime-cro09:40:003
3715790991711,4cyclictest3914352-21latency_hist10:20:013
3715782991715,1cyclictest3924652-21sh10:30:001
3715782991715,1cyclictest0-21swapper/112:20:001
3715782991714,2cyclictest3924674-21kworker/u8:1+flush-259:010:39:121
3715782991714,1cyclictest3763378-21cron07:55:001
3715782991713,3cyclictest4013196-21apt-get11:55:111
3715782991711,4cyclictest335557-21systemd-journal08:09:161
3715780991713,3cyclictest3924675-21kworker/u8:2+events_unbound11:40:270
3715780991713,3cyclictest3851760-21kworker/u8:1+events_unbound09:30:250
3715780991712,3cyclictest335557-21systemd-journal12:39:160
3715790991613,2cyclictest3924675-21kworker/u8:2+flush-259:010:50:003
3715790991611,3cyclictest3836806-21kworker/u8:0+flush-259:009:10:163
3715790991611,3cyclictest335557-21systemd-journal08:18:163
3715785991613,2cyclictest0-21swapper/209:45:002
371578599160,7cyclictest3867954-21munin-run09:35:002
3715782991610,4cyclictest3720901-21latency_hist07:15:001
3715780991613,2cyclictest3862081-21kworker/u8:3+events_unbound10:14:030
3715790991513,1cyclictest4018835-21irqcore12:00:153
3715790991513,1cyclictest3862827-21idleruntime-cro09:29:593
3715790991512,2cyclictest0-21swapper/310:15:003
3715785991513,1cyclictest0-21swapper/207:35:002
3715785991512,2cyclictest3992466-21kworker/u8:3+flush-259:011:55:162
3715785991512,2cyclictest3778910-21latency_hist08:10:002
3715782991514,1cyclictest3982145-21kworker/u8:1+flush-259:011:28:201
3715782991512,2cyclictest4006919-21ntp_offset11:45:211
3715782991512,2cyclictest3918614-21ntp_kernel_pll_10:20:201
3715782991512,2cyclictest2971-21cron09:34:591
3715780991513,1cyclictest60350irq/132-enp0s29f1:rx-009:50:230
3715780991513,1cyclictest60350irq/132-enp0s29f1:rx-009:25:120
3715780991512,2cyclictest3992466-21kworker/u8:3+flush-259:011:47:220
3715780991512,2cyclictest3914374-21kworker/u8:0+events_unbound10:20:210
3715780991511,3cyclictest3975860-21kworker/u8:4+events_unbound11:18:190
3715790991411,2cyclictest3982145-21kworker/u8:1+flush-259:011:25:163
3715790991411,2cyclictest3895162-21kthreadcore10:00:173
3715790991411,2cyclictest3895162-21kthreadcore10:00:163
3715790991411,2cyclictest3767714-21ntp_offset07:55:213
371578599149,4cyclictest4033621-21latency_hist12:15:002
371578599149,3cyclictest3976847-21cat11:20:012
3715785991411,2cyclictest4009029-21kthreadcore11:50:172
3715785991411,2cyclictest3883425-21kworker/u8:4+flush-259:010:25:252
3715785991410,2cyclictest0-21swapper/208:20:012
3715782991412,1cyclictest3878259-21idleruntime-cro09:45:001
3715782991411,2cyclictest4023678-21cpuspeed_turbos12:05:121
3715782991411,2cyclictest3773745-21latency_hist08:05:001
3715782991411,2cyclictest0-21swapper/109:19:591
3715780991412,1cyclictest60350irq/132-enp0s29f1:rx-012:10:230
3715780991412,1cyclictest60350irq/132-enp0s29f1:rx-007:58:520
3715780991412,1cyclictest60350irq/132-enp0s29f1:rx-007:40:220
3715780991411,2cyclictest60350irq/132-enp0s29f1:rx-011:00:130
3715780991411,2cyclictest3746998-21kworker/u8:3+events_unbound07:50:130
371579099139,3cyclictest4028227-21kworker/u8:0+flush-259:012:15:243
371579099139,3cyclictest3883425-21kworker/u8:4+flush-259:010:30:013
371579099139,2cyclictest0-21swapper/310:35:153
3715790991311,1cyclictest0-21swapper/311:55:153
3715790991310,2cyclictest3976946-21apt-get11:20:103
371578599139,3cyclictest3862081-21kworker/u8:3+flush-259:009:39:012
3715785991311,1cyclictest3821061-21idleruntime-cro08:50:002
3715785991311,1cyclictest0-21swapper/211:15:002
3715785991311,1cyclictest0-21swapper/208:15:002
3715785991310,2cyclictest3924674-21kworker/u8:1+flush-259:010:44:122
3715785991310,2cyclictest3832083-21irqcore09:00:172
3715785991310,2cyclictest2971-21cron09:14:592
371578299139,3cyclictest3914374-21kworker/u8:0+events_unbound10:30:171
3715782991310,2cyclictest3883373-21cron09:50:001
3715782991310,2cyclictest3820617-21unixbench_multi08:45:281
3715782991310,2cyclictest3735493-21ntp_kernel_pll_07:25:211
371579099129,2cyclictest4028788-21cpuspeed_turbos12:10:113
371579099129,2cyclictest3899334-21fschecks_count10:05:143
371579099129,2cyclictest3852366-21apt-key09:20:003
371579099129,2cyclictest0-21swapper/308:10:173
371579099129,1cyclictest0-21swapper/310:55:143
371579099126,4cyclictest3883653-21apt-get09:50:123
371579099126,4cyclictest3763403-21awk07:55:003
371579099121,9cyclictest3831384-21awk09:00:013
3715790991210,1cyclictest3811185-21cpuspeed_turbos08:40:133
3715790991210,1cyclictest0-21swapper/309:40:163
371578599129,2cyclictest3940677-21fschecks_time10:45:132
371578599129,2cyclictest3857148-21unixbench_multi09:20:262
371578599129,2cyclictest0-21swapper/207:24:592
3715785991210,1cyclictest500-21systemd-logind12:30:002
3715782991210,1cyclictest3889919-21kthreadcore09:55:151
371578099128,3cyclictest3721132-21kworker/u8:4+events_unbound07:30:130
371579099118,2cyclictest0-21swapper/311:15:023
371579099117,2cyclictest0-21swapper/308:25:263
371578599117,3cyclictest3924675-21kworker/u8:2+flush-259:010:37:212
371578599116,4cyclictest3746998-21kworker/u8:3+flush-259:007:40:262
371578299118,2cyclictest3987558-21fschecks_count11:30:141
371578299118,2cyclictest3869238-21kthreadcore09:35:181
371578299117,3cyclictest3945578-21apt-get10:50:121
371579099108,1cyclictest0-21swapper/307:15:163
371579099107,1cyclictest0-21swapper/308:50:193
371579099104,4cyclictest3820824-21sshd08:47:163
371579099101,6cyclictest3949558-21ntpq10:50:213
371578599106,3cyclictest3914374-21kworker/u8:0+flush-259:011:00:012
371578599101,8cyclictest0-21swapper/212:05:002
37157909997,1cyclictest0-21swapper/312:20:203
37157859996,1cyclictest0-21swapper/208:35:172
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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