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2026-05-23 - 18:06

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 here to display the system's profile data or here to proceed to next system.
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 100 highest latencies:
System rackeslot4s.osadl.org (updated Sat May 23, 2026 12:44:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3328674993628,6cyclictest3384798-21ntpq08:00:230
3328685993530,3cyclictest3620911-21kworker/u8:1+flush-259:011:50:173
3328683993328,3cyclictest3422017-21/usr/sbin/munin08:40:152
3328674993327,4cyclictest3339182-21latency_hist07:20:010
3328685993228,3cyclictest3344341-21kworker/u8:2+flush-259:007:40:173
3328685993226,4cyclictest509-21rs:main3
3328674993228,3cyclictest3636488-21kworker/u8:2+flush-259:012:15:160
3328674993228,3cyclictest3552837-21gpgv10:45:010
3328685993127,3cyclictest3510513-21kworker/u8:2+events_unbound10:30:013
3328685993125,4cyclictest3463483-21kworker/u8:3+flush-259:009:49:593
3328674993028,1cyclictest3568876-21kworker/0:2+pm11:27:070
3328685992926,2cyclictest3531349-21kworker/u8:0+flush-259:010:40:003
3328683992918,9cyclictest335557-21systemd-journal10:30:002
3328685992823,3cyclictest3553464-21kworker/u8:1+flush-259:011:10:003
3328683992813,6cyclictest0-21swapper/207:40:002
3328685992721,4cyclictest3515875-21diskstats10:10:133
3328679992721,4cyclictest335557-21systemd-journal10:45:011
3328674992722,4cyclictest3339454-21apt-get07:20:120
3328674992721,5cyclictest3573358-21ntpq11:00:200
3328685992623,2cyclictest3579406-21kworker/u8:2+flush-259:011:11:083
3328679992613,4cyclictest3630164-21ntp_kernel_pll_11:55:211
3328685992521,3cyclictest3479160-21kworker/u8:1+flush-259:009:50:183
3328683992519,4cyclictest3401081-21latency_hist08:20:012
3328679992519,4cyclictest3569117-21latency_hist11:00:011
3328674992519,4cyclictest335557-21systemd-journal12:10:000
3328683992419,3cyclictest3531417-21cp10:25:002
3328683992414,9cyclictest500-21systemd-logind11:27:082
3328679992418,4cyclictest3536897-21latency_hist10:30:011
3328674992417,5cyclictest3353829-21ntpq07:30:220
3328685992319,3cyclictest3636488-21kworker/u8:2+flush-259:012:25:003
3328685992319,3cyclictest3426957-21kworker/u8:1+flush-259:008:55:213
3328685992318,3cyclictest3579406-21kworker/u8:2+events_unbound11:20:183
3328685992317,4cyclictest3666610-21ntpq12:30:223
3328685992317,4cyclictest3666610-21ntpq12:30:223
3328685992317,4cyclictest3553464-21kworker/u8:1+flush-259:010:55:173
332868399230,13cyclictest3467672-21ntp_kernel_err09:20:212
3328685992219,2cyclictest3508791-21kworker/u8:1+flush-259:010:00:263
3328685992219,2cyclictest3508791-21kworker/u8:1+flush-259:010:00:253
3328685992218,3cyclictest3426957-21kworker/u8:1+events_unbound08:45:233
3328685992217,4cyclictest3370023-21kworker/u8:3+events_unbound08:40:223
3328685992217,3cyclictest3463483-21kworker/u8:3+events_unbound09:25:243
3328685992216,4cyclictest3641439-21latency_hist12:10:003
3328683992219,2cyclictest507-21in:imuxsock08:15:002
3328679992218,3cyclictest3558402-21apt-get10:49:591
3328674992218,3cyclictest3390998-21apt-get08:10:130
3328674992217,4cyclictest3411719-21apt-get08:30:120
3328674992216,5cyclictest3467691-21ntpq09:20:210
3328685992118,2cyclictest3323297-21kworker/u8:2+flush-259:007:15:003
3328685992117,3cyclictest3579406-21kworker/u8:2+events_unbound11:40:223
3328685992117,3cyclictest3489417-21kworker/u8:0+events_unbound10:15:203
3328685992116,4cyclictest3457631-21kworker/u8:0+flush-259:009:20:003
3328685992116,3cyclictest3531349-21kworker/u8:0+flush-259:011:00:163
3328685992116,3cyclictest3499763-21kworker/u8:4+events_unbound12:25:133
3328683992117,3cyclictest3323297-21kworker/u8:2+flush-259:007:10:162
3328679992116,4cyclictest335557-21systemd-journal09:55:281
3328674992119,1cyclictest3370023-21kworker/u8:3+events_unbound08:45:180
3328674992118,2cyclictest3620911-21kworker/u8:1+events_unbound12:10:200
3328674992115,4cyclictest3574522-21/usr/sbin/munin11:05:140
3328674992114,4cyclictest3349457-21latency_hist07:30:000
3328685992016,3cyclictest3426957-21kworker/u8:1+events_unbound09:00:183
3328685992015,3cyclictest3344341-21kworker/u8:2+flush-259:007:35:403
3328685992014,4cyclictest3334035-21kworker/u8:1+flush-259:007:29:553
3328683992016,3cyclictest3531349-21kworker/u8:0+flush-259:010:30:182
332868399201,17cyclictest3421766-21awk08:40:002
3328674992016,3cyclictest3457631-21kworker/u8:0+flush-259:009:25:140
3328674992013,5cyclictest335557-21systemd-journal10:49:070
3328685991917,1cyclictest3334035-21kworker/u8:1+events_unbound07:55:243
3328685991916,2cyclictest3616217-21irqcore11:45:163
3328685991916,2cyclictest187307-21kworker/u8:0+flush-259:007:15:153
3328685991915,3cyclictest3531349-21kworker/u8:0+flush-259:010:50:563
3328685991915,3cyclictest3370023-21kworker/u8:3+flush-259:008:05:233
3328685991915,3cyclictest187307-21kworker/u8:0+flush-259:007:20:263
3328685991914,4cyclictest3636488-21kworker/u8:2+events_unbound12:15:123
3328685991912,5cyclictest3499763-21kworker/u8:4+flush-259:011:35:173
332868399194,6cyclictest3662240-21munin-run12:30:002
3328683991917,1cyclictest3589713-21cron11:20:002
3328683991915,3cyclictest3553373-21gpgv10:45:002
3328683991915,3cyclictest3499763-21kworker/u8:4+flush-259:012:05:002
332868399190,9cyclictest3386277-21cat08:05:172
3328679991914,3cyclictest3427181-21apt-get08:45:111
3328674991916,2cyclictest3426957-21kworker/u8:1+events_unbound08:55:230
3328674991915,3cyclictest3626149-21/usr/sbin/munin11:55:190
3328674991915,3cyclictest3432293-21kworker/u8:2+flush-259:009:40:200
3328674991915,3cyclictest187307-21kworker/u8:0+flush-259:007:55:000
3328674991914,3cyclictest3636488-21kworker/u8:2+flush-259:012:35:000
3328674991914,3cyclictest3636488-21kworker/u8:2+flush-259:012:34:590
3328674991914,3cyclictest3401310-21kworker/u8:2+flush-259:008:25:210
3328674991913,4cyclictest335557-21systemd-journal07:14:590
332867499190,18cyclictest1-21systemd10:00:290
332867499190,18cyclictest1-21systemd10:00:280
3328685991814,3cyclictest3631083-21kworker/u8:0+events_unbound12:01:033
3328685991814,3cyclictest3499763-21kworker/u8:4+events_unbound11:15:163
3328685991814,3cyclictest3370023-21kworker/u8:3+events_unbound08:23:053
3328685991813,3cyclictest3380658-21kworker/u8:4+flush-259:008:05:013
3328685991812,4cyclictest3631083-21kworker/u8:0+flush-259:012:36:103
332868399181,15cyclictest3457836-21awk09:15:012
3328683991810,6cyclictest0-21swapper/209:50:212
332868399180,17cyclictest3328682-21cat07:10:012
332868399180,10cyclictest3478740-21taskset09:32:582
3328679991813,4cyclictest3334020-21latency_hist07:15:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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