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2026-08-23 - 10:01
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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 Sun Aug 23, 2026 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
386296799140128,8cyclictest3872734-21kworker/u8:2+events_unbound19:50:001
386296799130120,7cyclictest3956234-21kworker/u8:1+events_unbound00:25:151
386296799128119,6cyclictest3866114-21kworker/u8:1+events_unbound19:30:011
386296799126114,10cyclictest1213033-21systemd-journal23:15:011
386296799126111,6cyclictest3956234-21kworker/u8:1+flush-179:000:00:251
386296599126114,9cyclictest3967747-21latency_hist00:35:010
386296599125114,7cyclictest3861326-21kworker/u8:2+flush-179:019:15:160
386296599124111,10cyclictest3867666-21apt-get19:25:000
386296799121112,6cyclictest3887518-21kworker/u8:3+flush-179:020:30:191
386296599120110,7cyclictest3871078-21kworker/u8:3+events_unbound20:15:000
386296799117109,5cyclictest3944848-21kworker/u8:3+flush-179:023:35:231
386296599116109,5cyclictest3882535-21kworker/u8:2+flush-179:021:34:560
386296799115109,4cyclictest3956331-21kworker/u8:2+flush-179:000:10:181
386296799115106,6cyclictest3928912-21kworker/u8:2+events_unbound22:40:171
386296799115105,7cyclictest3956234-21kworker/u8:1+flush-179:000:15:211
386296799114106,6cyclictest3944848-21kworker/u8:3+flush-179:023:35:001
386296799114106,5cyclictest3925211-21kworker/u8:1+flush-179:023:50:141
386296599114107,5cyclictest3921022-21kworker/u8:0+flush-179:022:10:170
386296599114103,9cyclictest3941928-21apt-get23:15:120
386296799113106,5cyclictest3893686-21kworker/u8:1+flush-179:021:05:161
38629659911398,5cyclictest3921022-21kworker/u8:0+events_unbound22:55:000
386296599113105,6cyclictest3953624-21kworker/u8:0+flush-179:000:05:000
386296799112106,4cyclictest3944848-21kworker/u8:3+events_unbound23:45:141
386296599111102,7cyclictest3882535-21kworker/u8:2+flush-179:020:20:000
38629679911096,13cyclictest3925211-21kworker/u8:1+flush-179:023:15:231
386296799110100,8cyclictest1213033-21systemd-journal20:55:011
386296599110104,4cyclictest3956331-21kworker/u8:2+flush-179:000:20:240
386296599110103,5cyclictest3925211-21kworker/u8:1+flush-179:022:20:210
386296599110103,5cyclictest3925211-21kworker/u8:1+flush-179:022:20:210
38629679910999,7cyclictest3882535-21kworker/u8:2+flush-179:020:55:271
386296799109102,5cyclictest3953624-21kworker/u8:0+events_unbound00:05:261
386296799108102,4cyclictest3953624-21kworker/u8:0+flush-179:023:55:201
386296599108101,5cyclictest1-21systemd20:55:000
38629659910798,7cyclictest3882535-21kworker/u8:2+flush-179:022:15:160
38629659910798,6cyclictest3928912-21kworker/u8:2+events_unbound22:35:250
38629659910795,10cyclictest3875883-21apt-get19:50:000
38629679910698,5cyclictest3903428-21kworker/u8:0+events_unbound21:25:241
38629659910697,7cyclictest3911170-21apt-get21:40:000
386296599106100,5cyclictest3956234-21kworker/u8:1+events_unbound00:20:010
38629659910598,5cyclictest3925211-21kworker/u8:1+flush-179:023:45:160
38629659910498,4cyclictest3893686-21kworker/u8:1+flush-179:020:55:230
38629659910497,5cyclictest3861326-21kworker/u8:2+flush-179:019:25:220
38629659910497,4cyclictest3861326-21kworker/u8:2+flush-179:019:10:270
38629659910496,5cyclictest3882535-21kworker/u8:2+flush-179:020:20:140
38629659910487,7cyclictest3953624-21kworker/u8:0+flush-179:000:05:170
38629679910397,4cyclictest3943946-21kworker/u8:2+flush-179:023:20:211
38629679910397,4cyclictest3925211-21kworker/u8:1+flush-179:022:45:251
38629679910396,5cyclictest3921022-21kworker/u8:0+flush-179:023:00:161
38629679910393,7cyclictest3956331-21kworker/u8:2+events_unbound00:20:251
38629659910399,2cyclictest3911231-21kworker/u8:1+flush-179:022:05:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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