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2026-06-23 - 20:40
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OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #e, slot #6

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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackeslot6.osadl.org (updated Tue Jun 23, 2026 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
339699799131119,8cyclictest3442837-21latency_hist09:30:020
339699899129121,5cyclictest3423207-21kworker/u8:0+flush-179:009:25:011
339699899126117,6cyclictest3411829-21apt-get07:55:021
339699799123117,3cyclictest3457389-21kworker/u8:0+events_unbound10:25:000
339699799123113,7cyclictest3489516-21apt-get11:55:000
339699799123113,7cyclictest3489516-21apt-get11:55:000
339699899120111,7cyclictest3489516-21apt-get11:55:031
339699799119112,5cyclictest3494521-21kworker/u8:0+events_unbound12:20:010
339699899115106,6cyclictest3463524-21latency_hist10:35:011
339699799115108,5cyclictest3465389-21kworker/u8:0+flush-179:011:25:010
339699899114103,8cyclictest1213033-21systemd-journal09:55:011
339699799109102,5cyclictest3429572-21kworker/u8:1+flush-179:009:15:010
339699899108100,6cyclictest1213033-21systemd-journal07:50:001
33969979910699,6cyclictest3504142-21kworker/u8:1+events_unbound12:40:010
33969979910496,6cyclictest3469870-21kworker/u8:1+flush-179:011:10:000
33969989910393,7cyclictest3458757-21latency_hist10:20:011
33969979910293,7cyclictest3465389-21kworker/u8:0+events_unbound11:45:000
33969979910195,4cyclictest3457389-21kworker/u8:0+flush-179:010:30:250
33969979910195,4cyclictest3423207-21kworker/u8:0+flush-179:009:35:240
33969989910085,10cyclictest510-21rs:main1
3396997999993,4cyclictest3491628-21apt-get12:00:110
3396997999993,4cyclictest3465389-21kworker/u8:0+flush-179:011:00:250
3396997999887,7cyclictest3423221-21latency_hist08:30:010
3396997999687,6cyclictest3490002-21kworker/u8:2+events_unbound12:35:000
3396997999677,14cyclictest1213033-21systemd-journal09:20:000
3396997999588,5cyclictest3395100-21kworker/u8:3+events_unbound07:10:020
3396998999383,6cyclictest3484985-21kworker/u8:1+flush-179:011:40:231
3396997999386,5cyclictest3410217-21kworker/u8:2+events_unbound08:15:010
3396997999383,6cyclictest3380721-21kworker/u8:0+flush-179:007:25:200
3396997999282,8cyclictest3465389-21kworker/u8:0+events_unbound11:40:000
3396997999282,7cyclictest3380721-21kworker/u8:0+events_unbound07:45:010
3396998998760,23cyclictest1213033-21systemd-journal08:40:381
3396997998780,5cyclictest3476821-21kworker/u8:2+flush-179:011:30:200
3396997998780,5cyclictest3406416-21kworker/u8:3+flush-179:007:50:170
3396998998680,4cyclictest3431173-21latency_hist08:55:011
3396998998557,17cyclictest3457153-21latency_hist10:15:021
3396997998576,5cyclictest3429572-21kworker/u8:1+events_unbound09:35:000
3396997998572,4cyclictest3406416-21kworker/u8:3+events_unbound08:20:000
3396997998477,5cyclictest3425063-21apt-get08:35:120
3396997998476,5cyclictest3429572-21kworker/u8:1+flush-179:009:45:210
3396997998476,4cyclictest3395100-21kworker/u8:3+events_unbound07:15:200
339699799840,82cyclictest1-21systemd10:10:000
3396998998374,6cyclictest510-21rs:main1
3396997998377,4cyclictest3490002-21kworker/u8:2+flush-179:012:05:270
3396997998374,6cyclictest3411865-21kworker/u8:0+flush-179:008:00:010
3396997998275,4cyclictest3461935-21latency_hist10:30:000
3396998998174,5cyclictest3451042-21apt-get09:55:111
3396998998172,6cyclictest3465389-21kworker/u8:0+events_unbound11:15:001
3396997998073,5cyclictest3429572-21kworker/u8:1+flush-179:009:20:210
3396998997970,6cyclictest3449203-21latency_hist09:50:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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