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2026-07-18 - 21:36
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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 18, 2026 12:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
392519199166133,21cyclictest3929836-21latency_hist07:25:011
392519199148137,8cyclictest1213033-21systemd-journal10:10:001
392518899144139,4cyclictest3960317-21kworker/u8:2+events_unbound09:19:590
392519199140130,7cyclictest3949216-21latency_hist08:25:021
392518899131118,10cyclictest1213033-21systemd-journal11:15:010
3925188991310,128cyclictest1-21systemd09:55:010
392519199130122,5cyclictest3950836-21kworker/u8:0+flush-179:008:35:221
392518899130119,4cyclictest3995649-21kworker/u8:1+events_unbound10:55:260
392518899129122,5cyclictest3997290-21kworker/u8:2+events_unbound12:05:200
39251919912587,35cyclictest1213033-21systemd-journal11:20:001
392518899125118,4cyclictest3960317-21kworker/u8:2+events_unbound09:25:230
3925188991251,121cyclictest1-21systemd08:50:010
392518899124118,4cyclictest3975700-21kworker/u8:0+events_unbound10:00:200
392519199122114,5cyclictest4022977-21latency_hist12:15:011
392518899119114,4cyclictest3997290-21kworker/u8:2+events_unbound11:50:230
392518899118108,7cyclictest3961946-21latency_hist09:05:010
39251919911690,23cyclictest3962201-21apt-get09:05:121
392518899112106,4cyclictest3944471-21kworker/u8:3+events_unbound08:15:190
392518899110105,4cyclictest3980116-21kworker/u8:1+events_unbound10:15:250
392518899110101,3cyclictest3969884-21kworker/u8:0+events_unbound09:35:140
39251919910797,7cyclictest3933247-21kworker/u8:2+flush-179:007:45:241
392518899106101,4cyclictest3955561-21kworker/u8:0+events_unbound08:50:240
39251889910596,3cyclictest3961990-21kworker/u8:3+events_unbound10:10:250
39251919910392,8cyclictest4002549-21apt-get11:10:131
39251919910391,9cyclictest3941518-21apt-get08:00:121
39251889910398,4cyclictest4010224-21kworker/u8:0+events_unbound11:40:250
39251889910398,3cyclictest3933247-21kworker/u8:2+events_unbound07:45:230
39251889910292,3cyclictest4011889-21kworker/u8:3+events_unbound11:55:240
39251919910189,9cyclictest1213033-21systemd-journal11:55:001
39251889910195,4cyclictest4014054-21kworker/u8:1+events_unbound12:00:230
39251889910191,4cyclictest3987703-21kworker/u8:3+events_unbound10:50:260
39251889910191,4cyclictest3987703-21kworker/u8:3+events_unbound10:50:250
39251919910090,7cyclictest3981054-21apt-get10:05:001
3925188999994,4cyclictest3926690-21kworker/u8:2+events_unbound07:20:230
3925188999888,4cyclictest4011889-21kworker/u8:3+events_unbound11:45:240
3925188999791,4cyclictest3986318-21kworker/u8:0+events_unbound10:20:180
3925188999791,4cyclictest3933247-21kworker/u8:2+events_unbound07:50:110
3925188999787,3cyclictest3961990-21kworker/u8:3+events_unbound09:05:230
3925188999690,4cyclictest3961990-21kworker/u8:3+events_unbound09:10:260
3925191999583,9cyclictest3941010-21apt-get08:00:001
3925191999583,9cyclictest3941010-21apt-get08:00:001
3925188999387,4cyclictest3946060-21kworker/u8:1+events_unbound08:30:190
3925191999283,6cyclictest3933247-21kworker/u8:2+events_unbound07:50:191
3925188999288,3cyclictest3975700-21kworker/u8:0+events_unbound09:45:250
3925188999287,4cyclictest4006036-21kworker/u8:1+events_unbound11:35:260
3925191999184,4cyclictest4014054-21kworker/u8:1+flush-179:012:00:231
3925191999172,12cyclictest3975700-21kworker/u8:0+flush-179:009:55:231
3925188999186,3cyclictest3950836-21kworker/u8:0+events_unbound08:35:170
3925188999181,4cyclictest3961990-21kworker/u8:3+events_unbound09:40:220
3925191999083,5cyclictest3955617-21kworker/u8:2+flush-179:008:45:241
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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