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2026-08-25 - 14:11
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 Tue Aug 25, 2026 00:44:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
84471099149135,9cyclictest1213033-21systemd-journal22:50:021
84471099144134,7cyclictest897889-21latency_hist21:55:011
84470699139131,6cyclictest920676-21kworker/u8:0+events_unbound23:05:000
84470699139129,7cyclictest864217-21latency_hist20:10:010
84470699135128,5cyclictest898038-21kworker/u8:2+events_unbound22:29:590
84471099132123,7cyclictest861077-21kworker/u8:0+flush-179:020:20:011
84470699132122,8cyclictest844567-21latency_hist19:10:020
84470699132122,7cyclictest1213033-21systemd-journal19:15:020
84470699132122,7cyclictest1213033-21systemd-journal19:15:010
84471099131121,7cyclictest899766-21latency_hist22:00:021
84471099131121,7cyclictest899766-21latency_hist22:00:021
84470699125114,6cyclictest920676-21kworker/u8:0+events_unbound23:10:020
84470699124114,6cyclictest909330-21kworker/u8:0+events_unbound22:40:010
84470699121110,8cyclictest843107-21kworker/u8:1+events_unbound19:30:020
84470699120105,6cyclictest923913-21kworker/u8:3+flush-179:023:20:240
844706991200,118cyclictest1-21systemd23:00:000
844706991200,118cyclictest1-21systemd21:40:000
84471099118107,7cyclictest854683-21latency_hist19:40:011
84471099116104,4cyclictest934238-21kworker/u8:0+events_unbound00:00:011
84471099115103,9cyclictest944663-21latency_hist00:30:011
84470699115108,5cyclictest947555-21kworker/u8:0+flush-179:000:40:000
84470699113101,8cyclictest873747-21kworker/u8:0+events_unbound21:05:200
8447069911099,7cyclictest898038-21kworker/u8:2+events_unbound22:50:200
84470699109100,6cyclictest847827-21kworker/u8:3+flush-179:019:20:150
8447069910897,7cyclictest923852-21kworker/u8:2+events_unbound23:25:190
84470699108103,4cyclictest935907-21kworker/u8:2+events_unbound00:04:000
8447069910798,6cyclictest923913-21kworker/u8:3+events_unbound23:35:040
8447069910798,6cyclictest923913-21kworker/u8:3+events_unbound23:35:030
8447069910793,11cyclictest851236-21apt-get19:30:000
8447069910699,5cyclictest873747-21kworker/u8:0+events_unbound21:20:010
8447109910591,11cyclictest1213033-21systemd-journal21:25:001
8447069910595,8cyclictest854938-21apt-get19:40:130
8447069910592,5cyclictest923913-21kworker/u8:3+events_unbound23:57:150
8447069910498,4cyclictest942860-21kworker/u8:1+flush-179:000:30:200
8447069910497,4cyclictest867369-21kworker/u8:1+events_unbound20:45:200
8447069910393,8cyclictest937750-21/usr/sbin/munin00:05:260
8447069910393,8cyclictest873747-21kworker/u8:0+flush-179:020:50:260
8447109910193,5cyclictest924833-21apt-get23:15:201
8447109910093,5cyclictest843107-21kworker/u8:1+flush-179:019:25:171
8447069910095,4cyclictest884887-21kworker/u8:3+flush-179:021:55:250
8447069910095,4cyclictest884887-21kworker/u8:3+flush-179:021:55:240
844706999995,3cyclictest843107-21kworker/u8:1+flush-179:019:35:240
844706999992,4cyclictest942860-21kworker/u8:1+flush-179:000:25:250
844706999893,4cyclictest922267-21kworker/u8:1+flush-179:023:15:250
844706999889,6cyclictest881711-21kworker/u8:1+events_unbound21:10:180
844706999889,6cyclictest881711-21kworker/u8:1+events_unbound21:10:170
844706999783,7cyclictest884887-21kworker/u8:3+events_unbound21:20:190
844706999690,4cyclictest873747-21kworker/u8:0+events_unbound21:25:100
844706999687,7cyclictest923913-21kworker/u8:3+flush-179:000:20:160
844706999687,6cyclictest909330-21kworker/u8:0+flush-179:022:40:150
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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