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2025-11-20 - 04:43
OSADL QA Farm

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 Thu Nov 20, 2025 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
31074929911394,14cyclictest3189841-40logrotate00:00:010
3107492999584,8cyclictest3109358-21latency_hist19:45:020
3107492999484,7cyclictest3131732-21latency_hist21:00:010
3107492999388,4cyclictest3148145-21kworker/u8:0+events_unbound21:55:230
3107492998775,5cyclictest3110121-21kworker/u8:0+events_unbound19:50:450
3107492998681,4cyclictest3138156-21kworker/u8:3+events_unbound21:30:230
310749299850,84cyclictest1-21systemd19:15:000
3107492998377,4cyclictest3127207-21kworker/u8:2+flush-179:021:25:220
3107495998274,5cyclictest3134927-21kworker/u8:0+events_unbound21:20:021
3107492998278,3cyclictest3144512-21kworker/u8:3+events_unbound21:40:230
3107492998269,5cyclictest3108364-21kworker/u8:2+events_unbound20:00:220
3107495997863,10cyclictest3151315-21kworker/u8:1+flush-179:022:10:001
3107492997873,4cyclictest3196318-21kworker/u8:1+events_unbound00:35:240
3107492997873,4cyclictest3127207-21kworker/u8:2+events_unbound21:45:230
3107492997672,3cyclictest3173713-21kworker/u8:2+events_unbound23:20:220
3107495997563,8cyclictest271-21systemd-journal19:55:011
3107495997465,6cyclictest3179238-21kworker/u8:3+flush-179:023:40:001
3107495997465,6cyclictest3179238-21kworker/u8:3+flush-179:023:40:001
3107492997469,4cyclictest3108364-21kworker/u8:2+events_unbound20:05:240
3107492997469,4cyclictest3108364-21kworker/u8:2+events_unbound20:05:230
3107492997160,8cyclictest3173677-21latency_hist23:10:010
3107492997065,4cyclictest3162523-21kworker/u8:1+events_unbound22:35:250
310749899690,66cyclictest0-21swapper/320:34:003
3107495996963,4cyclictest3108364-21kworker/u8:2+flush-179:019:55:251
3107495996956,10cyclictest3109365-21apt-get19:45:001
310749699680,65cyclictest0-21swapper/220:34:002
3107492996864,3cyclictest3196318-21kworker/u8:1+flush-179:000:30:000
3107492996862,4cyclictest3109345-21kworker/u8:3+events_unbound19:55:070
3107495996756,8cyclictest3133335-21latency_hist21:05:011
3107495996753,9cyclictest3127207-21kworker/u8:2+flush-179:021:35:221
3107492996763,3cyclictest3144512-21kworker/u8:3+events_unbound22:20:130
3107492996763,3cyclictest3108364-21kworker/u8:2+events_unbound20:10:240
3107492996761,4cyclictest3173713-21kworker/u8:2+events_unbound23:15:200
3107495996657,6cyclictest271-21systemd-journal23:35:011
3107492996561,3cyclictest3134927-21kworker/u8:0+events_unbound21:10:220
3107492996555,8cyclictest3131984-21/usr/sbin/munin21:00:230
3107492996460,3cyclictest3118714-21kworker/u8:4+events_unbound20:25:190
3107492996459,4cyclictest3173713-21kworker/u8:2+flush-179:023:35:200
3107492996459,4cyclictest3173713-21kworker/u8:2+flush-179:023:35:200
3107495996341,20cyclictest3146318-21apt-get21:45:091
3107495996252,7cyclictest3175262-21latency_hist23:15:001
3107492996258,3cyclictest3179238-21kworker/u8:3+events_unbound00:04:030
3107492996249,9cyclictest3149493-21latency_hist21:55:000
3107495996150,9cyclictest3125641-21apt-get20:40:131
3107492996156,4cyclictest3165774-21kworker/u8:0+events_unbound22:50:200
3107492996150,9cyclictest3196540-21apt-get00:20:110
3107492996150,9cyclictest3196540-21apt-get00:20:100
3107495996044,14cyclictest3123764-21kworker/u8:1+flush-179:020:50:251
3107492995955,3cyclictest3127207-21kworker/u8:2+events_unbound20:45:190
3107492995854,3cyclictest3162523-21kworker/u8:1+flush-179:022:41:210
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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