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2026-09-23 - 03:07
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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 Sep 22, 2026 12:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
281734899137125,9cyclictest2825261-21latency_hist07:35:010
281734899137124,10cyclictest2833245-21latency_hist08:00:010
281734899131122,3cyclictest2803639-21kworker/u8:1+events_unbound07:10:230
281734899124111,9cyclictest2865343-21latency_hist09:40:010
281734899124111,10cyclictest1213033-21systemd-journal09:10:000
281735099123111,9cyclictest2862149-21latency_hist09:30:011
281734899119106,10cyclictest1213033-21systemd-journal09:55:010
281734899119106,10cyclictest1213033-21systemd-journal09:55:010
281735099118110,6cyclictest2833292-21gpgv08:00:001
281734899116111,4cyclictest2919194-21kworker/u8:3+events_unbound12:35:220
281734899116110,4cyclictest2867834-21kworker/u8:1+events_unbound10:25:190
281734899114109,4cyclictest2905071-21kworker/u8:1+events_unbound11:45:240
281734899114108,4cyclictest2857402-21kworker/u8:3+events_unbound10:00:150
281734899113103,4cyclictest2867834-21kworker/u8:1+events_unbound09:45:280
281735099112103,6cyclictest2911159-21kworker/u8:2+flush-179:012:20:011
281734899111106,4cyclictest2857402-21kworker/u8:3+events_unbound10:05:150
281734899111101,4cyclictest2883847-21kworker/u8:2+events_unbound11:10:190
28173489911099,8cyclictest2820493-21latency_hist07:20:010
28173489911097,10cyclictest2857623-21apt-get09:15:130
28173509910898,7cyclictest2868513-21latency_hist09:50:011
28173489910897,7cyclictest2838271-21latency_hist08:15:020
28173489910697,4cyclictest2911159-21kworker/u8:2+events_unbound12:05:210
28173509910598,5cyclictest2887299-21/usr/sbin/munin10:45:241
28173509910597,6cyclictest2905071-21kworker/u8:1+flush-179:012:05:011
28173489910595,8cyclictest2875650-21apt-get10:10:150
28173509910393,8cyclictest2875137-21latency_hist10:10:011
28173489910393,8cyclictest2844895-21apt-get08:35:110
28173489910297,4cyclictest2844631-21kworker/u8:1+events_unbound09:30:300
28173489910293,3cyclictest2824407-21kworker/u8:2+events_unbound08:30:270
28173509910191,8cyclictest2903081-21cp11:35:011
28173489910194,5cyclictest2901416-21kworker/u8:3+flush-179:011:30:150
28173489910191,4cyclictest2905071-21kworker/u8:1+events_unbound12:25:180
28173509910090,7cyclictest2913024-21/usr/sbin/munin12:05:241
2817350999891,5cyclictest2893461-21kworker/u8:1+flush-179:011:25:241
2817350999885,10cyclictest510-21rs:main1
2817350999790,5cyclictest2893461-21kworker/u8:1+flush-179:011:15:221
2817350999788,7cyclictest2857368-21latency_hist09:15:011
2817348999789,5cyclictest2826892-21latency_hist07:40:000
2817348999687,7cyclictest2914628-21apt-get12:10:130
2817350999588,5cyclictest2800460-21kworker/u8:2+flush-179:007:20:211
2817350999587,5cyclictest2867834-21kworker/u8:1+flush-179:009:55:241
2817348999591,3cyclictest2876502-21kworker/u8:0+events_unbound10:20:160
2817350999486,5cyclictest2909571-21kworker/u8:0+flush-179:011:55:161
2817350999384,6cyclictest2876502-21kworker/u8:0+events_unbound10:20:021
2817350999380,11cyclictest2830318-21apt-get07:50:131
2817350999380,11cyclictest2830318-21apt-get07:50:121
2817350999368,22cyclictest2904838-21latency_hist11:40:011
2817350999284,6cyclictest2846292-21kworker/u8:0+flush-179:009:05:211
2817350999283,5cyclictest2911159-21kworker/u8:2+flush-179:012:25:011
2817348999286,4cyclictest2898252-21kworker/u8:0+events_unbound11:40:190
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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