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2026-07-25 - 20:50
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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 Sat Jul 25, 2026 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
197657199141130,8cyclictest2024132-21latency_hist09:35:010
197657399137127,7cyclictest2066297-21latency_hist11:45:021
197657399133126,5cyclictest1984564-21apt-get07:31:571
197657399130106,21cyclictest2063085-21kworker/u8:0+events_unbound12:00:011
197657199130122,6cyclictest1991752-21kworker/u8:2+events_unbound08:00:000
197657399125117,5cyclictest2023939-21kworker/u8:3+flush-179:009:50:011
197657399124112,9cyclictest1988088-21latency_hist07:45:011
197657199123114,7cyclictest2015653-21latency_hist09:10:010
197657199122115,5cyclictest2033674-21kworker/u8:3+events_unbound10:05:020
197657399121111,7cyclictest1981389-21latency_hist07:25:011
197657199120113,5cyclictest2056991-21kworker/u8:1+events_unbound11:40:230
197657399119111,5cyclictest1963306-21kworker/u8:1+flush-179:007:40:001
197657199119110,3cyclictest2023939-21kworker/u8:3+events_unbound09:40:240
197657399116107,5cyclictest1963306-21kworker/u8:1+events_unbound07:10:021
197657199116111,4cyclictest2043233-21kworker/u8:1+flush-179:010:35:260
197657199116111,4cyclictest2033674-21kworker/u8:3+events_unbound10:25:260
197657199116111,4cyclictest1963306-21kworker/u8:1+flush-179:007:25:250
197657199114109,4cyclictest1981627-21kworker/u8:0+flush-179:007:50:240
197657199114109,4cyclictest1981627-21kworker/u8:0+flush-179:007:50:230
197657399113104,6cyclictest2084059-21latency_hist12:40:001
197657399113103,7cyclictest2033690-21latency_hist10:05:011
197657199113108,4cyclictest1981627-21kworker/u8:0+flush-179:008:00:240
197657199113104,7cyclictest2058307-21kworker/u8:3+flush-179:011:25:000
197657399112101,8cyclictest2022282-21latency_hist09:30:011
19765719911298,4cyclictest1991752-21kworker/u8:2+events_unbound08:10:270
197657199112108,3cyclictest2056991-21kworker/u8:1+events_unbound11:30:230
197657199112106,4cyclictest2063085-21kworker/u8:0+flush-179:011:50:240
197657399111104,4cyclictest2058307-21kworker/u8:3+flush-179:011:35:231
197657199111106,4cyclictest2012448-21kworker/u8:0+flush-179:009:10:270
197657199111101,4cyclictest2063085-21kworker/u8:0+events_unbound12:15:240
19765739910999,7cyclictest2008365-21kworker/u8:3+events_unbound08:45:241
197657199108103,4cyclictest2063085-21kworker/u8:0+events_unbound12:00:250
197657199108102,4cyclictest2012517-21kworker/u8:2+flush-179:009:25:250
19765739910797,7cyclictest2063085-21kworker/u8:0+events_unbound12:20:011
19765739910795,9cyclictest1213033-21systemd-journal08:55:001
197657399107101,4cyclictest2056991-21kworker/u8:1+flush-179:011:30:181
19765719910794,5cyclictest1991752-21kworker/u8:2+events_unbound08:30:180
197657199107101,5cyclictest1983010-21kworker/u8:2+flush-179:007:45:260
197657199107101,4cyclictest2066332-21kworker/u8:2+flush-179:012:10:220
197657199106102,3cyclictest2023939-21kworker/u8:3+flush-179:009:35:250
19765719910592,10cyclictest2039242-21apt-get10:20:130
197657199105100,4cyclictest1974805-21kworker/u8:3+events_unbound07:15:230
19765739910498,4cyclictest2077957-21apt-get12:20:141
19765739910490,6cyclictest2048511-21kworker/u8:2+events_unbound11:10:011
19765719910498,4cyclictest1991752-21kworker/u8:2+flush-179:008:40:210
19765739910395,5cyclictest2040572-21latency_hist10:25:011
19765739910393,7cyclictest2012517-21kworker/u8:2+flush-179:009:45:011
19765719910397,4cyclictest1963306-21kworker/u8:1+events_unbound07:20:220
19765719910391,4cyclictest2063085-21kworker/u8:0+events_unbound11:55:120
19765739910296,4cyclictest2043233-21kworker/u8:1+flush-179:010:40:241
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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