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2026-07-17 - 06:40

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 the 376 highest latencies:
System rackeslot4s.osadl.org (updated Fri Jul 17, 2026 00:44:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3665514995552,2cyclictest3660246-21kworker/u8:1+flush-259:019:35:210
3665516994537,5cyclictest3867789-21latency_hist22:25:011
3665516994036,3cyclictest3899325-21kworker/u8:4+flush-259:023:30:261
3665514993835,2cyclictest3842103-21kworker/u8:4+flush-259:022:20:210
3665514993834,3cyclictest3701704-21kworker/u8:2+events_unbound19:45:230
3665519993733,3cyclictest3940977-21kworker/u8:0+flush-259:023:40:002
3665516993732,4cyclictest3660246-21kworker/u8:1+flush-259:019:39:591
3665514993733,3cyclictest3826427-21kworker/u8:0+events_unbound21:50:170
3665516993633,2cyclictest3800570-21kworker/u8:1+flush-259:023:05:001
3665514993631,3cyclictest3676005-21kworker/u8:4+events_unbound19:25:200
3665514993532,2cyclictest3800570-21kworker/u8:1+events_unbound23:59:300
3665514993532,2cyclictest3800570-21kworker/u8:1+events_unbound22:50:230
3665514993532,2cyclictest3800570-21kworker/u8:1+events_unbound00:05:250
3665514993532,2cyclictest3701704-21kworker/u8:2+flush-259:020:30:160
3665514993531,3cyclictest3872992-21kworker/u8:2+events_unbound22:35:000
3665514993531,3cyclictest3872992-21kworker/u8:2+events_unbound22:34:590
3665514993531,3cyclictest3743426-21kworker/u8:3+events_unbound20:45:220
3665514993531,3cyclictest3676005-21kworker/u8:4+flush-259:019:20:100
3665519993430,3cyclictest3784961-21kworker/u8:2+flush-259:021:05:172
3665516993428,4cyclictest3743380-21latency_hist20:25:011
3665524993329,3cyclictest3920336-21kworker/u8:2+flush-259:023:35:173
3665519993330,2cyclictest3800570-21kworker/u8:1+flush-259:000:10:162
3665516993328,3cyclictest509-21rs:main1
3665516993328,3cyclictest3727475-21gpgv20:10:001
3665516993328,3cyclictest335557-21systemd-journal21:21:301
3665514993330,2cyclictest3784961-21kworker/u8:2+events_unbound21:30:400
3665514993329,3cyclictest3872992-21kworker/u8:2+flush-259:022:35:160
3665514993329,3cyclictest3601490-21kworker/u8:0+events_unbound20:15:260
3665514993329,3cyclictest3601490-21kworker/u8:0+events_unbound20:15:250
3665519993228,3cyclictest3899325-21kworker/u8:4+flush-259:023:20:232
3665519993228,3cyclictest3743426-21kworker/u8:3+flush-259:021:00:012
3665514993227,2cyclictest3790298-21kworker/u8:0+events_unbound21:20:220
3665524993126,3cyclictest3868032-21/usr/sbin/munin22:25:153
3665524993125,4cyclictest3800570-21kworker/u8:1+events_unbound21:35:163
3665519993126,4cyclictest335557-21systemd-journal20:33:282
3665514993128,2cyclictest3800570-21kworker/u8:1+flush-259:023:00:260
3665514993128,2cyclictest3701704-21kworker/u8:2+flush-259:019:55:230
3665514993128,2cyclictest3660246-21kworker/u8:1+events_unbound19:30:200
3665514993128,2cyclictest3601490-21kworker/u8:0+flush-259:020:20:250
3665514993128,2cyclictest3601490-21kworker/u8:0+events_unbound20:25:230
3665514993127,3cyclictest3987792-21kworker/u8:2+events_unbound00:34:310
3665514993127,3cyclictest3842103-21kworker/u8:4+flush-259:022:15:190
3665514993127,2cyclictest3701704-21kworker/u8:2+events_unbound19:50:180
3665514993123,3cyclictest3784961-21kworker/u8:2+events_unbound21:05:180
3665524993024,4cyclictest3966783-21cat00:00:013
3665519993027,2cyclictest3800570-21kworker/u8:1+flush-259:021:25:172
3665516993026,3cyclictest3998360-21apt-get00:30:101
3665514993027,2cyclictest3920336-21kworker/u8:2+events_unbound00:00:150
3665514993026,3cyclictest3790298-21kworker/u8:0+events_unbound21:15:180
3665514993026,3cyclictest3701704-21kworker/u8:2+events_unbound20:00:140
3665514993024,4cyclictest3805962-21apt-get21:25:110
3665516992923,4cyclictest3780197-21/usr/sbin/munin21:00:141
3665514992927,2cyclictest3800570-21kworker/u8:1+events_unbound23:25:180
3665514992926,2cyclictest3800570-21kworker/u8:1+events_unbound22:45:150
3665514992926,2cyclictest3676005-21kworker/u8:4+events_unbound19:40:190
3665514992925,3cyclictest3967276-21kworker/u8:4+flush-259:000:15:180
3665514992925,3cyclictest3800570-21kworker/u8:1+flush-259:023:52:510
3665524992824,3cyclictest3701704-21kworker/u8:2+events_unbound20:30:193
3665516992823,3cyclictest3805936-21/usr/sbin/munin21:25:201
3665514992825,2cyclictest3920336-21kworker/u8:2+events_unbound23:15:170
3665514992825,2cyclictest3676005-21kworker/u8:4+flush-259:020:05:210
3665514992825,2cyclictest3644947-21kworker/u8:2+events_unbound19:10:210
3665514992824,3cyclictest3997865-21kworker/u8:0+flush-259:000:35:160
3665524992723,3cyclictest3800570-21kworker/u8:1+flush-259:021:45:273
3665524992722,3cyclictest3811114-21/usr/sbin/munin21:30:363
3665519992724,2cyclictest3800570-21kworker/u8:1+flush-259:021:40:242
3665516992722,3cyclictest3800570-21kworker/u8:1+flush-259:022:20:001
3665516992722,3cyclictest3775070-21apt-get20:55:111
3665516992721,4cyclictest3934721-21ntpq23:25:221
3665514992721,5cyclictest3733052-21latency_hist20:15:010
3665514992721,5cyclictest3733052-21latency_hist20:15:000
3665524992622,3cyclictest3800570-21kworker/u8:1+flush-259:022:05:003
3665524992622,3cyclictest3800570-21kworker/u8:1+events_unbound00:20:223
3665524992622,3cyclictest3701704-21kworker/u8:2+flush-259:020:35:293
3665524992621,3cyclictest3758895-21apt-get20:40:013
3665519992620,4cyclictest3966619-21latency_hist00:00:012
3665516992620,4cyclictest3873209-21/usr/sbin/munin22:30:141
3665516992620,4cyclictest3873209-21/usr/sbin/munin22:30:141
3665514992623,2cyclictest3987792-21kworker/u8:2+events_unbound00:25:200
3665514992623,2cyclictest3800570-21kworker/u8:1+events_unbound22:05:140
3665514992622,3cyclictest3920336-21kworker/u8:2+events_unbound23:35:250
3665514992622,3cyclictest3790298-21kworker/u8:0+events_unbound21:10:220
3665514992620,4cyclictest335557-21systemd-journal20:35:290
3665524992522,2cyclictest3800570-21kworker/u8:1+flush-259:023:10:283
3665524992521,3cyclictest3899325-21kworker/u8:4+events_unbound23:30:183
3665524992521,3cyclictest3826427-21kworker/u8:0+events_unbound21:50:153
3665524992521,3cyclictest3800570-21kworker/u8:1+events_unbound22:10:183
3665524992519,4cyclictest3728113-21/usr/sbin/munin20:10:203
3665524992519,4cyclictest3728113-21/usr/sbin/munin20:10:193
3665519992518,5cyclictest3956289-21latency_hist23:50:012
3665516992522,2cyclictest3701704-21kworker/u8:2+flush-259:019:55:211
3665516992522,2cyclictest3601490-21kworker/u8:0+events_unbound19:15:201
3665516992520,3cyclictest3681213-21apt-get19:25:111
3665514992523,2cyclictest3826427-21kworker/u8:0+events_unbound21:55:230
3665524992422,1cyclictest3800570-21kworker/u8:1+events_unbound23:05:253
3665524992420,3cyclictest3743426-21kworker/u8:3+flush-259:020:45:243
3665516992420,3cyclictest3920336-21kworker/u8:2+flush-259:023:15:211
3665516992420,3cyclictest3800570-21kworker/u8:1+flush-259:022:25:171
3665516992419,4cyclictest3987792-21kworker/u8:2+flush-259:000:25:201
3665516992417,5cyclictest3790493-21/usr/sbin/munin21:10:111
3665514992421,2cyclictest3899325-21kworker/u8:4+events_unbound23:20:200
3665514992421,2cyclictest3800570-21kworker/u8:1+events_unbound21:45:310
3665524992317,4cyclictest3701704-21kworker/u8:2+events_unbound20:00:193
3665524992316,5cyclictest3961434-21latency_hist23:55:013
3665519992319,3cyclictest335557-21systemd-journal19:40:292
3665519992318,4cyclictest3888775-21cat22:45:012
3665516992319,3cyclictest3701704-21kworker/u8:2+flush-259:020:35:211
3665516992318,4cyclictest3743623-21/usr/sbin/munin20:25:161
3665514992320,2cyclictest3940977-21kworker/u8:0+flush-259:023:47:350
3665514992319,3cyclictest3800570-21kworker/u8:1+events_unbound23:05:140
3665514992319,3cyclictest3774852-21kworker/u8:0+events_unbound21:00:150
3665514992316,5cyclictest3904287-21apt-get22:57:270
3665524992218,3cyclictest3701704-21kworker/u8:2+events_unbound19:50:153
3665524992217,4cyclictest3987792-21kworker/u8:2+flush-259:000:30:173
3665519992216,4cyclictest3987792-21kworker/u8:2+flush-259:000:25:212
3665516992216,4cyclictest3836709-21latency_hist21:54:591
3665514992218,3cyclictest3753756-21kworker/u8:1+events_unbound20:52:280
3665524992118,2cyclictest3601490-21kworker/u8:0+events_unbound20:15:203
3665524992118,2cyclictest3601490-21kworker/u8:0+events_unbound20:15:203
3665524992117,3cyclictest3940977-21kworker/u8:0+events_unbound23:40:173
3665524992117,3cyclictest3852301-21kworker/u8:0+events_unbound22:22:283
3665524992117,3cyclictest3644947-21kworker/u8:2+flush-259:019:10:243
3665524992117,3cyclictest3601490-21kworker/u8:0+events_unbound20:25:313
3665524992116,4cyclictest3743426-21kworker/u8:3+events_unbound20:50:183
3665519992117,3cyclictest3784961-21kworker/u8:2+flush-259:021:40:012
3665516992118,2cyclictest4008451-21sh00:40:011
3665516992115,4cyclictest3956521-21/usr/sbin/munin23:50:151
3665514992119,2cyclictest3784961-21kworker/u8:2+events_unbound21:44:300
3665514992118,2cyclictest3920336-21kworker/u8:2+flush-259:023:40:260
3665514992118,2cyclictest3878424-21kworker/u8:3+events_unbound22:40:170
3665514992116,4cyclictest335557-21systemd-journal00:12:500
3665524992017,2cyclictest3920336-21kworker/u8:2+events_unbound23:45:303
3665524992016,3cyclictest3800570-21kworker/u8:1+flush-259:021:40:103
3665524992016,3cyclictest3701704-21kworker/u8:2+events_unbound19:45:283
3665524992016,2cyclictest3847363-21apt-get22:05:133
3665524992015,4cyclictest335557-21systemd-journal23:30:003
3665519992016,3cyclictest3800570-21kworker/u8:1+events_unbound23:10:192
3665519992015,4cyclictest3889170-21base6422:45:012
3665519992012,5cyclictest3831585-21latency_hist21:50:002
3665516992016,3cyclictest3852513-21/usr/sbin/munin22:10:151
3665516992015,3cyclictest335557-21systemd-journal20:10:291
3665516992015,3cyclictest335557-21systemd-journal20:10:281
3665516992015,3cyclictest335557-21systemd-journal00:05:301
3665514992016,3cyclictest3899324-21kworker/u8:3+events_unbound23:10:250
3665514992016,3cyclictest3743426-21kworker/u8:3+events_unbound20:55:260
3665524991916,2cyclictest3800570-21kworker/u8:1+events_unbound23:22:333
3665524991916,2cyclictest3800570-21kworker/u8:1+events_unbound22:49:303
3665524991915,3cyclictest3826427-21kworker/u8:0+flush-259:021:55:243
3665524991915,3cyclictest3660246-21kworker/u8:1+flush-259:019:35:233
3665524991912,5cyclictest335557-21systemd-journal21:10:013
3665519991916,1cyclictest0-21swapper/220:40:002
3665516991916,2cyclictest3899569-21apt-get22:55:111
3665516991915,3cyclictest3764739-21apt-get20:45:121
3665514991916,2cyclictest3842103-21kworker/u8:4+events_unbound22:12:270
3665514991916,2cyclictest3800570-21kworker/u8:1+events_unbound00:20:280
3665524991815,2cyclictest3676005-21kworker/u8:4+events_unbound19:24:303
3665524991814,3cyclictest3800570-21kworker/u8:1+events_unbound00:05:293
3665524991814,2cyclictest3920336-21kworker/u8:2+events_unbound23:15:233
3665519991812,4cyclictest335557-21systemd-journal19:46:292
3665516991814,3cyclictest3784961-21kworker/u8:2+flush-259:021:35:221
3665516991814,3cyclictest3601490-21kworker/u8:0+flush-259:020:15:271
3665516991814,3cyclictest3601490-21kworker/u8:0+flush-259:020:15:261
3665524991714,2cyclictest3784961-21kworker/u8:2+events_unbound21:22:303
3665524991714,2cyclictest3691292-21idleruntime-cro19:35:003
3665524991713,3cyclictest3997865-21kworker/u8:0+events_unbound00:39:313
3665524991713,3cyclictest3889201-21kworker/u8:0+events_unbound22:59:303
3665524991713,3cyclictest3800570-21kworker/u8:1+events_unbound00:10:283
3665524991713,2cyclictest3701704-21kworker/u8:2+events_unbound19:55:203
3665524991710,5cyclictest3967230-21base6400:00:013
3665519991714,2cyclictest3920336-21kworker/u8:2+flush-259:023:15:262
3665519991714,2cyclictest3914912-21cron23:10:002
3665519991713,3cyclictest3939877-21ntp_kernel_pll_23:30:232
3665516991714,2cyclictest3940977-21kworker/u8:0+flush-259:023:37:351
3665516991711,4cyclictest3883632-21/usr/sbin/munin22:40:151
3665514991713,3cyclictest3800570-21kworker/u8:1+events_unbound23:33:440
3665514991713,3cyclictest3800570-21kworker/u8:1+events_unbound22:00:560
3665514991713,3cyclictest3753756-21kworker/u8:1+events_unbound20:43:300
3665524991612,3cyclictest3899324-21kworker/u8:3+events_unbound23:00:173
3665524991612,3cyclictest3872992-21kworker/u8:2+flush-259:022:35:213
3665524991611,4cyclictest3967276-21kworker/u8:4+events_unbound00:15:283
3665519991611,4cyclictest3800570-21kworker/u8:1+flush-259:022:05:162
3665519991611,4cyclictest3743426-21kworker/u8:3+flush-259:020:50:262
366551999160,14cyclictest335557-21systemd-journal23:25:302
3665516991611,4cyclictest3894388-21/usr/sbin/munin22:50:161
3665516991610,4cyclictest3789340-21ntpq21:05:211
366552499159,4cyclictest3727452-21apt-get20:09:593
3665524991512,2cyclictest3878424-21kworker/u8:3+events_unbound22:40:253
3665524991512,2cyclictest3676005-21kworker/u8:4+events_unbound19:27:083
3665524991511,3cyclictest3875565-21kthreadcore22:30:183
3665524991511,3cyclictest3875565-21kthreadcore22:30:183
3665524991511,3cyclictest3676005-21kworker/u8:4+events_unbound19:42:123
3665519991512,2cyclictest3769208-21unixbench_singl20:45:242
3665519991511,2cyclictest3872955-21cron22:30:002
366551699159,5cyclictest3711043-21ntpq19:50:211
3665516991512,2cyclictest0-21swapper/123:25:001
3665516991512,2cyclictest0-21swapper/122:40:001
3665516991511,3cyclictest3940977-21kworker/u8:0+flush-259:023:41:071
3665516991510,4cyclictest335557-21systemd-journal19:12:301
3665514991511,3cyclictest3800570-21kworker/u8:1+events_unbound22:25:010
3665514991511,3cyclictest3644947-21kworker/u8:2+events_unbound19:16:590
3665514991510,3cyclictest3821233-21latency_hist21:40:000
3665524991410,3cyclictest3889201-21kworker/u8:0+events_unbound22:50:133
3665524991410,3cyclictest3790298-21kworker/u8:0+events_unbound21:10:303
366551999149,3cyclictest3790298-21kworker/u8:0+flush-259:021:10:162
3665519991411,2cyclictest3690441-21ntp_kernel_pll_19:30:212
3665519991411,2cyclictest3666750-21kthreadcore19:10:162
3665519991410,3cyclictest3899324-21kworker/u8:3+flush-259:022:55:252
3665519991410,3cyclictest3676005-21kworker/u8:4+flush-259:020:05:252
366551999140,3cyclictest3816056-21apt21:35:012
3665516991410,3cyclictest3660246-21kworker/u8:1+flush-259:019:30:221
3665524991310,2cyclictest3743426-21kworker/u8:3+events_unbound20:56:293
3665519991310,2cyclictest3852606-21cpuspeed_turbos22:10:132
3665519991310,2cyclictest3780289-21cpuspeed_turbos21:00:122
3665519991310,2cyclictest3743716-21cpuspeed_turbos20:25:142
3665519991310,2cyclictest3733383-21cpuspeed_turbos20:15:152
3665519991310,2cyclictest3733383-21cpuspeed_turbos20:15:152
3665519991310,2cyclictest3691644-21cpuspeed_turbos19:35:112
3665519991310,2cyclictest0-21swapper/200:20:002
3665519991310,1cyclictest0-21swapper/222:24:592
366551699139,3cyclictest3753756-21kworker/u8:1+flush-259:020:44:351
366551699138,4cyclictest3967144-21cat00:00:011
3665516991311,1cyclictest0-21swapper/120:30:161
366551699130,8cyclictest1-21systemd22:10:001
366552499128,3cyclictest3842103-21kworker/u8:4+events_unbound22:15:253
366552499127,4cyclictest3967276-21kworker/u8:4+events_unbound00:25:273
366551999129,2cyclictest3992507-21unixbench_singl00:20:262
366551999129,2cyclictest3712277-21cpuspeed_turbos19:55:122
366551999129,2cyclictest3671292-21irqcore19:15:172
366551999129,2cyclictest3660246-21kworker/u8:1+flush-259:019:20:222
366551999129,2cyclictest0-21swapper/223:40:182
366551999129,1cyclictest0-21swapper/221:15:172
366551999128,3cyclictest3987792-21kworker/u8:2+flush-259:000:38:002
366551999121,2cyclictest3722267-21awk20:04:592
366551699128,3cyclictest3821490-21apt-get21:40:111
366552499117,3cyclictest3784961-21kworker/u8:2+flush-259:021:29:343
366551999119,1cyclictest0-21swapper/222:50:142
366551999118,2cyclictest3739492-21kthreadcore20:20:172
366551999111,8cyclictest3847094-21latency_hist22:05:002
366551699119,1cyclictest0-21swapper/122:05:001
366551699118,2cyclictest0-21swapper/100:20:141
366552499107,2cyclictest3774852-21kworker/u8:0+events_unbound21:01:293
366551999106,2cyclictest3835816-21ntp_kernel_pll_21:50:212
366551999105,4cyclictest3957020-21sed23:50:172
366551699107,1cyclictest0-21swapper/123:55:131
36655199997,1cyclictest0-21swapper/220:10:142
36655199997,1cyclictest0-21swapper/220:10:132
36655169997,1cyclictest0-21swapper/121:15:171
36655169997,1cyclictest0-21swapper/120:00:241
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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