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2026-06-06 - 23:28

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #4

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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rackeslot4s.osadl.org (updated Sat Jun 06, 2026 00:44:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2444992994438,4cyclictest2710653-21latency_hist23:25:013
2444987994441,2cyclictest2549702-21kworker/u8:0+flush-259:021:30:011
2444992994339,2cyclictest2658735-21gpgv22:35:013
2444992994238,3cyclictest2549702-21kworker/u8:0+events_unbound21:45:023
2444992994037,2cyclictest2549702-21kworker/u8:0+events_unbound21:37:303
2444992994036,3cyclictest2471205-21kworker/u8:3+events_unbound19:37:313
2444984994032,6cyclictest335557-21systemd-journal20:55:000
2444987993934,3cyclictest2684909-21kworker/u8:0+flush-259:023:20:221
2444987993933,4cyclictest2742212-21kworker/u8:0+flush-259:023:55:151
2444984993931,6cyclictest2658805-21cp22:35:000
2444992993835,2cyclictest2518170-21kworker/u8:2+events_unbound20:20:253
2444992993834,3cyclictest2653664-21kworker/u8:2+events_unbound22:55:143
2444987993834,3cyclictest2653451-21kworker/u8:1+flush-259:023:00:201
2444992993734,3cyclictest2705517-21kworker/u8:1+events_unbound23:31:183
2444992993734,2cyclictest2752767-21kworker/u8:4+events_unbound00:05:153
2444992993733,3cyclictest2493289-21kworker/u8:0+events_unbound20:10:293
2444992993733,3cyclictest2429517-21kworker/u8:2+events_unbound19:25:293
2444988993731,4cyclictest2518426-21latency_hist20:20:012
2444987993731,4cyclictest2664480-21apt-get22:40:121
2444987993730,5cyclictest2626251-21ntpq22:00:201
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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