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2026-05-23 - 09:00

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 May 23, 2026 00:44:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3810092995852,4cyclictest3986476-21getprofile21:57:453
3810083994236,4cyclictest3809982-21latency_hist19:10:011
3810078994238,3cyclictest4060419-21kworker/u8:0+events_unbound23:30:210
3810088994135,4cyclictest4102056-21latency_hist23:50:002
3810092994034,4cyclictest4039626-21latency_hist22:50:003
3810083994036,3cyclictest335557-21systemd-journal21:58:101
3810078993936,2cyclictest4034440-21kworker/u8:5+events_unbound23:05:200
3810092993832,4cyclictest3949590-21latency_hist21:25:013
3810078993835,2cyclictest3949607-21kworker/u8:0+events_unbound21:45:220
3810078993734,2cyclictest3992426-21kworker/u8:2+flush-259:023:40:200
3810078993734,2cyclictest3804833-21kworker/u8:4+events_unbound19:40:210
3810078993633,2cyclictest3997819-21kworker/u8:3+flush-259:022:10:230
3810078993633,2cyclictest3850428-21kworker/u8:2+flush-259:019:55:240
3810078993632,3cyclictest3992426-21kworker/u8:2+flush-259:023:25:200
3810078993632,3cyclictest3986566-21kworker/u8:2+events_unbound21:58:020
3810078993631,3cyclictest4112555-21/usr/sbin/munin00:00:240
3810078993532,2cyclictest4086801-21kworker/u8:4+events_unbound00:15:150
3810078993532,2cyclictest3949607-21kworker/u8:0+events_unbound22:35:180
3810078993531,3cyclictest3959935-21gpgv21:35:010
3810078993531,3cyclictest3804833-21kworker/u8:4+flush-259:019:45:180
3810092993430,3cyclictest3924072-21kworker/u8:4+events_unbound21:05:213
3810083993430,3cyclictest335557-21systemd-journal21:36:071
3810083993429,4cyclictest3991524-21ntpq22:00:221
3810078993431,2cyclictest3992426-21kworker/u8:2+flush-259:023:35:220
3810078993431,2cyclictest3924072-21kworker/u8:4+flush-259:021:20:230
3810078993431,2cyclictest3877273-21kworker/u8:3+events_unbound20:15:210
3810078993430,3cyclictest3918910-21kworker/u8:2+flush-259:021:00:150
3810078993430,3cyclictest3799627-21kworker/u8:2+events_unbound19:30:140
3810078993430,3cyclictest3789757-21kworker/u8:3+events_unbound19:10:220
3810078993330,2cyclictest4102284-21kworker/u8:3+events_unbound00:20:240
3810078993330,2cyclictest4086801-21kworker/u8:4+flush-259:023:55:200
3810078993330,2cyclictest3855987-21kworker/u8:0+events_unbound20:10:210
3810092993127,3cyclictest3789757-21kworker/u8:3+flush-259:019:15:253
3810078993128,2cyclictest4143157-21kworker/u8:0+events_unbound00:30:220
3810078993128,2cyclictest4112542-21kworker/u8:2+flush-259:000:05:220
3810078993128,2cyclictest4060419-21kworker/u8:0+events_unbound23:45:220
3810078993128,2cyclictest3924072-21kworker/u8:4+events_unbound21:11:160
3810078993128,2cyclictest3789757-21kworker/u8:3+events_unbound19:20:190
3810078993127,3cyclictest3892748-21kworker/u8:1+events_unbound20:40:150
3810088993026,3cyclictest4044833-21kworker/u8:3+flush-259:023:00:252
3810088993024,4cyclictest3908409-21diskstats20:45:132
3810083993023,5cyclictest4038785-21ntpq22:45:211
3810083993023,5cyclictest4002757-21latency_hist22:15:011
3810078993027,2cyclictest3992426-21kworker/u8:2+events_unbound23:15:150
3810078993027,2cyclictest3867293-21kworker/u8:2+events_unbound20:25:180
3810078993026,3cyclictest3882495-21apt-get20:20:080
3810078993025,4cyclictest3861788-21kworker/u8:4+events_unbound20:05:200
3810078993024,4cyclictest3825693-21/usr/sbin/munin19:25:130
3810088992925,3cyclictest3887374-21kworker/u8:0+events_unbound20:50:322
3810083992925,3cyclictest507-21in:imuxsock21:35:001
3810078992926,2cyclictest3992426-21kworker/u8:2+flush-259:022:51:310
3810078992926,2cyclictest3949607-21kworker/u8:0+events_unbound22:00:150
3810078992926,2cyclictest3789757-21kworker/u8:3+events_unbound19:15:210
3810092992823,3cyclictest4112542-21kworker/u8:2+events_unbound00:10:173
3810088992823,4cyclictest3865842-21ntpq20:00:212
3810088992823,3cyclictest4008448-21base6422:20:002
3810083992823,3cyclictest335557-21systemd-journal20:51:241
3810078992824,3cyclictest3892748-21kworker/u8:1+events_unbound20:45:220
3810092992722,3cyclictest3892748-21kworker/u8:1+flush-259:020:40:213
3810092992721,4cyclictest4102483-21diskstats23:50:153
3810092992721,4cyclictest3877045-21latency_hist20:15:003
3810088992723,3cyclictest4143157-21kworker/u8:0+flush-259:000:30:002
3810083992723,3cyclictest509-21rs:main1
3810078992724,2cyclictest3992426-21kworker/u8:2+events_unbound22:25:140
3810078992724,2cyclictest3992426-21kworker/u8:2+events_unbound22:15:220
3810078992724,2cyclictest3825681-21kworker/u8:1+events_unbound20:01:090
3810078992723,3cyclictest3959951-21kworker/u8:1+flush-259:021:55:010
3810078992720,6cyclictest3840071-21ntpq19:35:200
3810092992622,3cyclictest4013596-21kworker/u8:3+events_unbound22:37:473
3810092992621,4cyclictest3877273-21kworker/u8:3+flush-259:020:35:133
3810088992622,3cyclictest3789757-21kworker/u8:3+flush-259:019:10:162
3810088992620,4cyclictest4050086-21latency_hist23:00:002
3810078992623,2cyclictest3959951-21kworker/u8:1+flush-259:022:05:190
3810078992622,3cyclictest3850428-21kworker/u8:2+events_unbound19:50:110
3810092992522,2cyclictest3892748-21kworker/u8:1+events_unbound20:30:183
3810092992521,3cyclictest3825681-21kworker/u8:1+events_unbound20:05:153
3810092992521,2cyclictest3846362-21apt-get19:45:103
3810088992519,4cyclictest3856372-21latency_hist19:55:012
3810088992519,4cyclictest335557-21systemd-journal21:30:002
3810083992521,3cyclictest335557-21systemd-journal22:32:071
3810083992518,5cyclictest4060551-21cat23:10:001
3810078992522,2cyclictest4061042-21kworker/u8:1+events_unbound23:50:230
3810078992522,2cyclictest3877273-21kworker/u8:3+events_unbound21:15:200
3810078992521,3cyclictest3949852-21apt-get21:25:100
3810078992519,5cyclictest3970697-21latency_hist21:45:010
3810092992421,2cyclictest3892748-21kworker/u8:1+events_unbound20:45:163
3810092992420,3cyclictest3992426-21kworker/u8:2+events_unbound22:10:143
3810092992420,3cyclictest3949607-21kworker/u8:0+flush-259:022:30:123
3810092992419,3cyclictest4143157-21kworker/u8:0+events_unbound00:35:153
3810083992419,4cyclictest335557-21systemd-journal21:26:071
3810083992419,4cyclictest335557-21systemd-journal21:06:071
3810083992417,6cyclictest335557-21systemd-journal19:55:011
3810078992421,2cyclictest4029462-21kworker/u8:1+flush-259:022:55:250
3810078992421,2cyclictest3949607-21kworker/u8:0+flush-259:022:20:260
3810078992419,4cyclictest3992426-21kworker/u8:2+flush-259:022:31:230
3810092992320,2cyclictest3804833-21kworker/u8:4+flush-259:019:30:053
3810092992319,3cyclictest4102284-21kworker/u8:3+flush-259:000:20:133
3810083992320,2cyclictest4013503-21kworker/u8:1+flush-259:022:25:001
3810083992317,4cyclictest4076251-21latency_hist23:25:011
3810078992320,2cyclictest3992426-21kworker/u8:2+events_unbound22:45:180
3810078992320,2cyclictest3992426-21kworker/u8:2+events_unbound22:40:130
3810092992219,2cyclictest4061042-21kworker/u8:1+events_unbound23:20:233
3810092992218,3cyclictest4143157-21kworker/u8:0+flush-259:000:30:243
3810092992218,3cyclictest3992426-21kworker/u8:2+flush-259:022:50:123
3810092992218,3cyclictest3850428-21kworker/u8:2+events_unbound19:51:103
3810088992218,3cyclictest4112542-21kworker/u8:2+flush-259:000:05:242
3810088992218,3cyclictest3877273-21kworker/u8:3+flush-259:020:15:242
3810078992219,2cyclictest4060419-21kworker/u8:0+events_unbound23:23:080
3810078992219,2cyclictest3949607-21kworker/u8:0+flush-259:021:35:240
3810078992219,2cyclictest3877273-21kworker/u8:3+events_unbound21:06:260
3810078992218,3cyclictest3892748-21kworker/u8:1+events_unbound20:30:160
3810092992118,2cyclictest4044833-21kworker/u8:3+events_unbound23:00:213
3810092992118,2cyclictest3992426-21kworker/u8:2+events_unbound22:55:213
3810092992117,3cyclictest4112542-21kworker/u8:2+flush-259:000:25:263
3810092992117,3cyclictest4086801-21kworker/u8:4+events_unbound23:55:203
3810092992117,3cyclictest4086801-21kworker/u8:4+events_unbound00:19:073
3810092992117,3cyclictest3992426-21kworker/u8:2+flush-259:023:15:123
3810092992117,3cyclictest3992426-21kworker/u8:2+events_unbound23:26:353
3810092992117,3cyclictest3949607-21kworker/u8:0+events_unbound21:33:083
3810092992117,3cyclictest3949607-21kworker/u8:0+events_unbound21:25:233
3810092992117,3cyclictest3867293-21kworker/u8:2+events_unbound20:21:083
3810088992117,3cyclictest3877273-21kworker/u8:3+flush-259:021:10:152
3810088992116,3cyclictest4102284-21kworker/u8:3+flush-259:000:10:242
3810088992115,4cyclictest4023059-21ntpq22:30:222
3810088992115,4cyclictest3948700-21ntpq21:20:212
3810088992114,5cyclictest3901931-21ntpq20:35:192
3810088992114,5cyclictest335557-21systemd-journal21:57:542
3810083992118,2cyclictest335557-21systemd-journal00:33:431
3810083992116,4cyclictest4122901-21apt-get00:10:111
3810083992114,5cyclictest3944448-21latency_hist21:20:011
3810078992115,5cyclictest4142388-21ntpq00:25:210
3810092992017,2cyclictest4034440-21kworker/u8:5+events_unbound23:05:083
3810092992017,2cyclictest3992426-21kworker/u8:2+events_unbound23:40:233
3810092992016,3cyclictest4029462-21kworker/u8:1+events_unbound22:40:083
3810092992015,4cyclictest3877273-21kworker/u8:3+events_unbound20:15:173
3810092992015,3cyclictest3918910-21kworker/u8:2+flush-259:021:20:003
3810088992017,2cyclictest3861547-21idleruntime-cro20:00:012
3810088992017,2cyclictest2971-21cron20:29:592
3810088992016,3cyclictest3992426-21kworker/u8:2+flush-259:022:40:242
3810088992014,4cyclictest4034440-21kworker/u8:5+flush-259:023:05:162
3810083992014,4cyclictest3992426-21kworker/u8:2+flush-259:023:35:141
3810083992014,4cyclictest335557-21systemd-journal00:15:081
3810083992011,7cyclictest335557-21systemd-journal19:39:081
3810092991916,2cyclictest3815150-21turbostat.cron19:15:003
3810092991915,3cyclictest3949607-21kworker/u8:0+events_unbound21:45:243
3810092991915,3cyclictest3924072-21kworker/u8:4+events_unbound21:43:093
3810092991915,3cyclictest3825681-21kworker/u8:1+events_unbound19:42:083
3810092991914,3cyclictest4007928-21apt-get22:19:593
3810088991915,3cyclictest3804833-21kworker/u8:4+flush-259:019:45:232
3810088991915,3cyclictest3789757-21kworker/u8:3+flush-259:019:20:252
3810088991914,4cyclictest3887374-21kworker/u8:0+flush-259:020:45:002
3810088991913,4cyclictest4112335-21kworker/u8:0+flush-259:000:00:262
3810088991913,4cyclictest3834844-21ntpq19:30:192
3810083991911,5cyclictest3975000-21ntpq21:45:231
3810092991815,2cyclictest4112335-21kworker/u8:0+events_unbound00:00:243
3810092991815,2cyclictest3825681-21kworker/u8:1+events_unbound20:00:173
3810092991814,3cyclictest3959951-21kworker/u8:1+events_unbound22:01:183
3810092991814,3cyclictest3949607-21kworker/u8:0+events_unbound21:35:253
3810088991815,2cyclictest3855987-21kworker/u8:0+flush-259:020:10:122
3810088991815,1cyclictest0-21swapper/223:30:002
3810088991813,3cyclictest3992426-21kworker/u8:2+events_unbound22:25:172
3810083991813,4cyclictest3841179-21apt-get19:40:111
3810083991813,3cyclictest4061042-21kworker/u8:1+flush-259:023:55:141
3810078991814,3cyclictest3918910-21kworker/u8:2+events_unbound20:57:090
3810092991714,2cyclictest3867293-21kworker/u8:2+events_unbound20:26:093
3810092991713,2cyclictest0-21swapper/319:30:013
3810092991712,3cyclictest3992426-21kworker/u8:2+events_unbound23:45:073
3810092991712,3cyclictest3913153-21turbostat20:54:553
3810088991714,2cyclictest4043842-21needreboot22:50:182
3810088991713,3cyclictest3918910-21kworker/u8:2+flush-259:021:00:252
3810088991712,3cyclictest3949607-21kworker/u8:0+flush-259:021:40:142
3810088991712,3cyclictest3841154-21/usr/sbin/munin19:40:202
3810078991714,2cyclictest3887374-21kworker/u8:0+flush-259:020:35:150
3810078991713,3cyclictest3892748-21kworker/u8:1+events_unbound20:50:500
3810092991614,1cyclictest3825681-21kworker/u8:1+events_unbound19:59:223
3810092991613,2cyclictest3997577-21idleruntime-cro22:10:003
3810092991612,3cyclictest4086801-21kworker/u8:4+flush-259:000:09:133
3810092991612,3cyclictest4060419-21kworker/u8:0+flush-259:023:30:173
3810088991612,3cyclictest4060419-21kworker/u8:0+flush-259:023:30:202
3810088991612,3cyclictest3861788-21kworker/u8:4+flush-259:020:05:162
3810088991610,4cyclictest3923844-21latency_hist21:00:012
3810083991610,4cyclictest509-21rs:main1
3810078991613,2cyclictest4143157-21kworker/u8:0+events_unbound00:35:450
3810078991612,3cyclictest4061042-21kworker/u8:1+events_unbound23:10:320
3810078991612,3cyclictest4061042-21kworker/u8:1+events_unbound23:10:320
3810092991511,3cyclictest3918910-21kworker/u8:2+events_unbound21:03:083
3810092991511,3cyclictest3825681-21kworker/u8:1+flush-259:019:35:113
381008899158,5cyclictest335557-21systemd-journal23:25:012
3810088991511,3cyclictest4143664-21diskstats00:30:142
3810088991511,3cyclictest4087094-21fschecks_time23:35:132
3810088991510,4cyclictest3799627-21kworker/u8:2+flush-259:019:17:042
381008399159,4cyclictest3855987-21kworker/u8:0+flush-259:020:05:011
381008399153,7cyclictest3923003-21ntpq20:55:211
381008399153,2cyclictest4121741-21ntpq00:05:201
381008399153,2cyclictest3876220-21ntpq20:10:221
381008399152,4cyclictest3871020-21gcc20:05:221
381008399152,2cyclictest4065048-21ntpq23:10:201
381008399152,2cyclictest4065048-21ntpq23:10:191
3810083991512,2cyclictest3811298-21kthreadcore19:10:181
3810083991511,3cyclictest335557-21systemd-journal20:40:001
3810083991511,2cyclictest4086571-21sh23:35:001
3810083991510,4cyclictest3976103-21apt-get21:50:111
3810083991510,3cyclictest3934409-21apt-get21:10:101
3810078991511,3cyclictest4034440-21kworker/u8:5+events_unbound23:00:320
3810078991510,3cyclictest4112542-21kworker/u8:2+flush-259:000:15:010
3810092991411,2cyclictest3887374-21kworker/u8:0+flush-259:020:55:203
3810092991410,3cyclictest3992426-21kworker/u8:2+events_unbound23:38:083
381008399148,4cyclictest3892520-21latency_hist20:30:001
381008399142,3cyclictest4138071-21systemd-run00:25:001
381008399142,2cyclictest3969864-21ld21:40:191
381008399141,3cyclictest3835038-21sensors19:30:231
3810083991411,2cyclictest4003084-21cpuspeed_turbos22:15:131
381009299139,3cyclictest4061042-21kworker/u8:1+events_unbound23:10:233
381009299139,3cyclictest4061042-21kworker/u8:1+events_unbound23:10:223
381009299138,3cyclictest4008603-21/usr/sbin/munin22:20:233
3810092991310,2cyclictest3992426-21kworker/u8:2+events_unbound22:25:193
3810092991310,2cyclictest3824583-21ntp_kernel_pll_19:20:223
381008899139,3cyclictest4102284-21kworker/u8:3+events_unbound00:20:132
381008899139,2cyclictest0-21swapper/220:25:002
3810088991310,1cyclictest0-21swapper/221:05:142
381008399139,3cyclictest4066239-21apt-get23:15:101
381008399139,2cyclictest0-21swapper/122:25:241
381008399137,4cyclictest4076515-21apt-get23:25:101
381008399132,3cyclictest3851259-21systemd-run19:50:011
381008399132,2cyclictest4152689-21ntpq00:35:191
381008399132,2cyclictest4101215-21ntpq23:45:221
381008399132,2cyclictest4054380-21ntpq23:00:201
381008399131,7cyclictest3825456-21munin-run19:25:011
381008399131,2cyclictest4106395-21ntpq23:50:231
381008399131,2cyclictest4049174-21ntpq22:55:211
381008399131,2cyclictest3926275-21cut21:00:181
3810083991310,2cyclictest3944972-21fschecks_time21:20:151
3810083991310,2cyclictest3886440-21ntp_kernel_err20:20:181
3810083991310,2cyclictest0-21swapper/120:40:241
381008399130,3cyclictest3896796-21ntpq20:30:211
381009299127,3cyclictest3965723-21kworker/u8:3+flush-259:021:50:393
381009299126,4cyclictest3939284-21latency_hist21:15:013
381008899129,2cyclictest4007447-21unixbench_multi22:15:252
381008899129,2cyclictest2971-21cron23:45:002
381008899128,3cyclictest3799627-21kworker/u8:2+flush-259:019:30:012
381008899125,4cyclictest3980958-21cron21:55:002
381008399122,2cyclictest32-21ksoftirqd/122:55:001
381008399121,7cyclictest32-21ksoftirqd/122:35:221
381008399121,3cyclictest32-21ksoftirqd/122:40:211
3810083991211,1cyclictest301rcuc/122:07:391
381008399120,7cyclictest4142425-21ntp_states00:25:221
381008399120,3cyclictest4117386-21sshd00:04:071
381008399120,2cyclictest4095970-21ntpq23:40:191
381008899118,2cyclictest4102388-21cpuspeed_turbos23:50:142
381008899118,2cyclictest3971033-21cpuspeed_turbos21:45:142
381008899118,1cyclictest0-21swapper/222:05:012
381008899117,3cyclictest401ktimers/222:35:122
381008899117,2cyclictest4061042-21kworker/u8:1+flush-259:023:10:202
381008899117,2cyclictest4061042-21kworker/u8:1+flush-259:023:10:202
381008399113,4cyclictest32-21ksoftirqd/120:15:131
381008399111,3cyclictest301rcuc/120:45:161
381008399111,2cyclictest32-21ksoftirqd/119:55:061
381008899107,2cyclictest4035792-21kthreadcore22:45:172
381008899107,2cyclictest3955173-21cpuspeed_turbos21:30:142
381008899106,3cyclictest3836081-21cpuspeed_turbos19:35:112
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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